1 /* Compiler driver program that can handle many languages. 2 Copyright (C) 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 4 2010, 2011, 2012 5 Free Software Foundation, Inc. 6 7 This file is part of GCC. 8 9 GCC is free software; you can redistribute it and/or modify it under 10 the terms of the GNU General Public License as published by the Free 11 Software Foundation; either version 3, or (at your option) any later 12 version. 13 14 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 15 WARRANTY; without even the implied warranty of MERCHANTABILITY or 16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 17 for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with GCC; see the file COPYING3. If not see 21 <http://www.gnu.org/licenses/>. */ 22 23 /* This program is the user interface to the C compiler and possibly to 24 other compilers. It is used because compilation is a complicated procedure 25 which involves running several programs and passing temporary files between 26 them, forwarding the users switches to those programs selectively, 27 and deleting the temporary files at the end. 28 29 CC recognizes how to compile each input file by suffixes in the file names. 30 Once it knows which kind of compilation to perform, the procedure for 31 compilation is specified by a string called a "spec". */ 32 33 #include "config.h" 34 #include "system.h" 35 #include "coretypes.h" 36 #include "multilib.h" /* before tm.h */ 37 #include "tm.h" 38 #include "xregex.h" 39 #include "obstack.h" 40 #include "intl.h" 41 #include "prefix.h" 42 #include "gcc.h" 43 #include "diagnostic.h" 44 #include "flags.h" 45 #include "opts.h" 46 #include "params.h" 47 #include "vec.h" 48 #include "filenames.h" 49 50 /* By default there is no special suffix for target executables. */ 51 /* FIXME: when autoconf is fixed, remove the host check - dj */ 52 #if defined(TARGET_EXECUTABLE_SUFFIX) && defined(HOST_EXECUTABLE_SUFFIX) 53 #define HAVE_TARGET_EXECUTABLE_SUFFIX 54 #endif 55 56 /* By default there is no special suffix for host executables. */ 57 #ifdef HOST_EXECUTABLE_SUFFIX 58 #define HAVE_HOST_EXECUTABLE_SUFFIX 59 #else 60 #define HOST_EXECUTABLE_SUFFIX "" 61 #endif 62 63 /* By default, the suffix for target object files is ".o". */ 64 #ifdef TARGET_OBJECT_SUFFIX 65 #define HAVE_TARGET_OBJECT_SUFFIX 66 #else 67 #define TARGET_OBJECT_SUFFIX ".o" 68 #endif 69 70 static const char dir_separator_str[] = { DIR_SEPARATOR, 0 }; 71 72 /* Most every one is fine with LIBRARY_PATH. For some, it conflicts. */ 73 #ifndef LIBRARY_PATH_ENV 74 #define LIBRARY_PATH_ENV "LIBRARY_PATH" 75 #endif 76 77 /* If a stage of compilation returns an exit status >= 1, 78 compilation of that file ceases. */ 79 80 #define MIN_FATAL_STATUS 1 81 82 /* Flag set by cppspec.c to 1. */ 83 int is_cpp_driver; 84 85 /* Flag set to nonzero if an @file argument has been supplied to gcc. */ 86 static bool at_file_supplied; 87 88 /* Definition of string containing the arguments given to configure. */ 89 #include "configargs.h" 90 91 /* Flag saying to print the command line options understood by gcc and its 92 sub-processes. */ 93 94 static int print_help_list; 95 96 /* Flag saying to print the version of gcc and its sub-processes. */ 97 98 static int print_version; 99 100 /* Flag indicating whether we should ONLY print the command and 101 arguments (like verbose_flag) without executing the command. 102 Displayed arguments are quoted so that the generated command 103 line is suitable for execution. This is intended for use in 104 shell scripts to capture the driver-generated command line. */ 105 static int verbose_only_flag; 106 107 /* Flag indicating how to print command line options of sub-processes. */ 108 109 static int print_subprocess_help; 110 111 /* Whether we should report subprocess execution times to a file. */ 112 113 FILE *report_times_to_file = NULL; 114 115 /* Nonzero means place this string before uses of /, so that include 116 and library files can be found in an alternate location. */ 117 118 #ifdef TARGET_SYSTEM_ROOT 119 static const char *target_system_root = TARGET_SYSTEM_ROOT; 120 #else 121 static const char *target_system_root = 0; 122 #endif 123 124 /* Nonzero means pass the updated target_system_root to the compiler. */ 125 126 static int target_system_root_changed; 127 128 /* Nonzero means append this string to target_system_root. */ 129 130 static const char *target_sysroot_suffix = 0; 131 132 /* Nonzero means append this string to target_system_root for headers. */ 133 134 static const char *target_sysroot_hdrs_suffix = 0; 135 136 /* Nonzero means write "temp" files in source directory 137 and use the source file's name in them, and don't delete them. */ 138 139 static enum save_temps { 140 SAVE_TEMPS_NONE, /* no -save-temps */ 141 SAVE_TEMPS_CWD, /* -save-temps in current directory */ 142 SAVE_TEMPS_OBJ /* -save-temps in object directory */ 143 } save_temps_flag; 144 145 /* Output file to use to get the object directory for -save-temps=obj */ 146 static char *save_temps_prefix = 0; 147 static size_t save_temps_length = 0; 148 149 /* The compiler version. */ 150 151 static const char *compiler_version; 152 153 /* The target version. */ 154 155 static const char *const spec_version = DEFAULT_TARGET_VERSION; 156 157 /* The target machine. */ 158 159 static const char *spec_machine = DEFAULT_TARGET_MACHINE; 160 161 /* Nonzero if cross-compiling. 162 When -b is used, the value comes from the `specs' file. */ 163 164 #ifdef CROSS_DIRECTORY_STRUCTURE 165 static const char *cross_compile = "1"; 166 #else 167 static const char *cross_compile = "0"; 168 #endif 169 170 /* Greatest exit code of sub-processes that has been encountered up to 171 now. */ 172 static int greatest_status = 1; 173 174 /* This is the obstack which we use to allocate many strings. */ 175 176 static struct obstack obstack; 177 178 /* This is the obstack to build an environment variable to pass to 179 collect2 that describes all of the relevant switches of what to 180 pass the compiler in building the list of pointers to constructors 181 and destructors. */ 182 183 static struct obstack collect_obstack; 184 185 /* Forward declaration for prototypes. */ 186 struct path_prefix; 187 struct prefix_list; 188 189 static void init_spec (void); 190 static void store_arg (const char *, int, int); 191 static void insert_wrapper (const char *); 192 static char *load_specs (const char *); 193 static void read_specs (const char *, int); 194 static void set_spec (const char *, const char *); 195 static struct compiler *lookup_compiler (const char *, size_t, const char *); 196 static char *build_search_list (const struct path_prefix *, const char *, 197 bool, bool); 198 static void xputenv (const char *); 199 static void putenv_from_prefixes (const struct path_prefix *, const char *, 200 bool); 201 static int access_check (const char *, int); 202 static char *find_a_file (const struct path_prefix *, const char *, int, bool); 203 static void add_prefix (struct path_prefix *, const char *, const char *, 204 int, int, int); 205 static void add_sysrooted_prefix (struct path_prefix *, const char *, 206 const char *, int, int, int); 207 static char *skip_whitespace (char *); 208 static void delete_if_ordinary (const char *); 209 static void delete_temp_files (void); 210 static void delete_failure_queue (void); 211 static void clear_failure_queue (void); 212 static int check_live_switch (int, int); 213 static const char *handle_braces (const char *); 214 static inline bool input_suffix_matches (const char *, const char *); 215 static inline bool switch_matches (const char *, const char *, int); 216 static inline void mark_matching_switches (const char *, const char *, int); 217 static inline void process_marked_switches (void); 218 static const char *process_brace_body (const char *, const char *, const char *, int, int); 219 static const struct spec_function *lookup_spec_function (const char *); 220 static const char *eval_spec_function (const char *, const char *); 221 static const char *handle_spec_function (const char *); 222 static char *save_string (const char *, int); 223 static void set_collect_gcc_options (void); 224 static int do_spec_1 (const char *, int, const char *); 225 static int do_spec_2 (const char *); 226 static void do_option_spec (const char *, const char *); 227 static void do_self_spec (const char *); 228 static const char *find_file (const char *); 229 static int is_directory (const char *, bool); 230 static const char *validate_switches (const char *); 231 static void validate_all_switches (void); 232 static inline void validate_switches_from_spec (const char *); 233 static void give_switch (int, int); 234 static int used_arg (const char *, int); 235 static int default_arg (const char *, int); 236 static void set_multilib_dir (void); 237 static void print_multilib_info (void); 238 static void perror_with_name (const char *); 239 static void display_help (void); 240 static void add_preprocessor_option (const char *, int); 241 static void add_assembler_option (const char *, int); 242 static void add_linker_option (const char *, int); 243 static void process_command (unsigned int, struct cl_decoded_option *); 244 static int execute (void); 245 static void alloc_args (void); 246 static void clear_args (void); 247 static void fatal_signal (int); 248 #if defined(ENABLE_SHARED_LIBGCC) && !defined(REAL_LIBGCC_SPEC) 249 static void init_gcc_specs (struct obstack *, const char *, const char *, 250 const char *); 251 #endif 252 #if defined(HAVE_TARGET_OBJECT_SUFFIX) || defined(HAVE_TARGET_EXECUTABLE_SUFFIX) 253 static const char *convert_filename (const char *, int, int); 254 #endif 255 256 static const char *getenv_spec_function (int, const char **); 257 static const char *if_exists_spec_function (int, const char **); 258 static const char *if_exists_else_spec_function (int, const char **); 259 static const char *replace_outfile_spec_function (int, const char **); 260 static const char *remove_outfile_spec_function (int, const char **); 261 static const char *version_compare_spec_function (int, const char **); 262 static const char *include_spec_function (int, const char **); 263 static const char *find_file_spec_function (int, const char **); 264 static const char *find_plugindir_spec_function (int, const char **); 265 static const char *print_asm_header_spec_function (int, const char **); 266 static const char *compare_debug_dump_opt_spec_function (int, const char **); 267 static const char *compare_debug_self_opt_spec_function (int, const char **); 268 static const char *compare_debug_auxbase_opt_spec_function (int, const char **); 269 static const char *pass_through_libs_spec_func (int, const char **); 270 271 /* The Specs Language 272 273 Specs are strings containing lines, each of which (if not blank) 274 is made up of a program name, and arguments separated by spaces. 275 The program name must be exact and start from root, since no path 276 is searched and it is unreliable to depend on the current working directory. 277 Redirection of input or output is not supported; the subprograms must 278 accept filenames saying what files to read and write. 279 280 In addition, the specs can contain %-sequences to substitute variable text 281 or for conditional text. Here is a table of all defined %-sequences. 282 Note that spaces are not generated automatically around the results of 283 expanding these sequences; therefore, you can concatenate them together 284 or with constant text in a single argument. 285 286 %% substitute one % into the program name or argument. 287 %i substitute the name of the input file being processed. 288 %b substitute the basename of the input file being processed. 289 This is the substring up to (and not including) the last period 290 and not including the directory unless -save-temps was specified 291 to put temporaries in a different location. 292 %B same as %b, but include the file suffix (text after the last period). 293 %gSUFFIX 294 substitute a file name that has suffix SUFFIX and is chosen 295 once per compilation, and mark the argument a la %d. To reduce 296 exposure to denial-of-service attacks, the file name is now 297 chosen in a way that is hard to predict even when previously 298 chosen file names are known. For example, `%g.s ... %g.o ... %g.s' 299 might turn into `ccUVUUAU.s ccXYAXZ12.o ccUVUUAU.s'. SUFFIX matches 300 the regexp "[.0-9A-Za-z]*%O"; "%O" is treated exactly as if it 301 had been pre-processed. Previously, %g was simply substituted 302 with a file name chosen once per compilation, without regard 303 to any appended suffix (which was therefore treated just like 304 ordinary text), making such attacks more likely to succeed. 305 %|SUFFIX 306 like %g, but if -pipe is in effect, expands simply to "-". 307 %mSUFFIX 308 like %g, but if -pipe is in effect, expands to nothing. (We have both 309 %| and %m to accommodate differences between system assemblers; see 310 the AS_NEEDS_DASH_FOR_PIPED_INPUT target macro.) 311 %uSUFFIX 312 like %g, but generates a new temporary file name even if %uSUFFIX 313 was already seen. 314 %USUFFIX 315 substitutes the last file name generated with %uSUFFIX, generating a 316 new one if there is no such last file name. In the absence of any 317 %uSUFFIX, this is just like %gSUFFIX, except they don't share 318 the same suffix "space", so `%g.s ... %U.s ... %g.s ... %U.s' 319 would involve the generation of two distinct file names, one 320 for each `%g.s' and another for each `%U.s'. Previously, %U was 321 simply substituted with a file name chosen for the previous %u, 322 without regard to any appended suffix. 323 %jSUFFIX 324 substitutes the name of the HOST_BIT_BUCKET, if any, and if it is 325 writable, and if save-temps is off; otherwise, substitute the name 326 of a temporary file, just like %u. This temporary file is not 327 meant for communication between processes, but rather as a junk 328 disposal mechanism. 329 %.SUFFIX 330 substitutes .SUFFIX for the suffixes of a matched switch's args when 331 it is subsequently output with %*. SUFFIX is terminated by the next 332 space or %. 333 %d marks the argument containing or following the %d as a 334 temporary file name, so that that file will be deleted if GCC exits 335 successfully. Unlike %g, this contributes no text to the argument. 336 %w marks the argument containing or following the %w as the 337 "output file" of this compilation. This puts the argument 338 into the sequence of arguments that %o will substitute later. 339 %V indicates that this compilation produces no "output file". 340 %W{...} 341 like %{...} but mark last argument supplied within 342 as a file to be deleted on failure. 343 %o substitutes the names of all the output files, with spaces 344 automatically placed around them. You should write spaces 345 around the %o as well or the results are undefined. 346 %o is for use in the specs for running the linker. 347 Input files whose names have no recognized suffix are not compiled 348 at all, but they are included among the output files, so they will 349 be linked. 350 %O substitutes the suffix for object files. Note that this is 351 handled specially when it immediately follows %g, %u, or %U 352 (with or without a suffix argument) because of the need for 353 those to form complete file names. The handling is such that 354 %O is treated exactly as if it had already been substituted, 355 except that %g, %u, and %U do not currently support additional 356 SUFFIX characters following %O as they would following, for 357 example, `.o'. 358 %I Substitute any of -iprefix (made from GCC_EXEC_PREFIX), -isysroot 359 (made from TARGET_SYSTEM_ROOT), -isystem (made from COMPILER_PATH 360 and -B options) and -imultilib as necessary. 361 %s current argument is the name of a library or startup file of some sort. 362 Search for that file in a standard list of directories 363 and substitute the full name found. 364 %eSTR Print STR as an error message. STR is terminated by a newline. 365 Use this when inconsistent options are detected. 366 %nSTR Print STR as a notice. STR is terminated by a newline. 367 %x{OPTION} Accumulate an option for %X. 368 %X Output the accumulated linker options specified by compilations. 369 %Y Output the accumulated assembler options specified by compilations. 370 %Z Output the accumulated preprocessor options specified by compilations. 371 %a process ASM_SPEC as a spec. 372 This allows config.h to specify part of the spec for running as. 373 %A process ASM_FINAL_SPEC as a spec. A capital A is actually 374 used here. This can be used to run a post-processor after the 375 assembler has done its job. 376 %D Dump out a -L option for each directory in startfile_prefixes. 377 If multilib_dir is set, extra entries are generated with it affixed. 378 %l process LINK_SPEC as a spec. 379 %L process LIB_SPEC as a spec. 380 %G process LIBGCC_SPEC as a spec. 381 %R Output the concatenation of target_system_root and 382 target_sysroot_suffix. 383 %S process STARTFILE_SPEC as a spec. A capital S is actually used here. 384 %E process ENDFILE_SPEC as a spec. A capital E is actually used here. 385 %C process CPP_SPEC as a spec. 386 %1 process CC1_SPEC as a spec. 387 %2 process CC1PLUS_SPEC as a spec. 388 %* substitute the variable part of a matched option. (See below.) 389 Note that each comma in the substituted string is replaced by 390 a single space. 391 %<S remove all occurrences of -S from the command line. 392 Note - this command is position dependent. % commands in the 393 spec string before this one will see -S, % commands in the 394 spec string after this one will not. 395 %>S Similar to "%<S", but keep it in the GCC command line. 396 %<S* remove all occurrences of all switches beginning with -S from the 397 command line. 398 %:function(args) 399 Call the named function FUNCTION, passing it ARGS. ARGS is 400 first processed as a nested spec string, then split into an 401 argument vector in the usual fashion. The function returns 402 a string which is processed as if it had appeared literally 403 as part of the current spec. 404 %{S} substitutes the -S switch, if that switch was given to GCC. 405 If that switch was not specified, this substitutes nothing. 406 Here S is a metasyntactic variable. 407 %{S*} substitutes all the switches specified to GCC whose names start 408 with -S. This is used for -o, -I, etc; switches that take 409 arguments. GCC considers `-o foo' as being one switch whose 410 name starts with `o'. %{o*} would substitute this text, 411 including the space; thus, two arguments would be generated. 412 %{S*&T*} likewise, but preserve order of S and T options (the order 413 of S and T in the spec is not significant). Can be any number 414 of ampersand-separated variables; for each the wild card is 415 optional. Useful for CPP as %{D*&U*&A*}. 416 417 %{S:X} substitutes X, if the -S switch was given to GCC. 418 %{!S:X} substitutes X, if the -S switch was NOT given to GCC. 419 %{S*:X} substitutes X if one or more switches whose names start 420 with -S was given to GCC. Normally X is substituted only 421 once, no matter how many such switches appeared. However, 422 if %* appears somewhere in X, then X will be substituted 423 once for each matching switch, with the %* replaced by the 424 part of that switch that matched the '*'. 425 %{.S:X} substitutes X, if processing a file with suffix S. 426 %{!.S:X} substitutes X, if NOT processing a file with suffix S. 427 %{,S:X} substitutes X, if processing a file which will use spec S. 428 %{!,S:X} substitutes X, if NOT processing a file which will use spec S. 429 430 %{S|T:X} substitutes X if either -S or -T was given to GCC. This may be 431 combined with '!', '.', ',', and '*' as above binding stronger 432 than the OR. 433 If %* appears in X, all of the alternatives must be starred, and 434 only the first matching alternative is substituted. 435 %{S:X; if S was given to GCC, substitutes X; 436 T:Y; else if T was given to GCC, substitutes Y; 437 :D} else substitutes D. There can be as many clauses as you need. 438 This may be combined with '.', '!', ',', '|', and '*' as above. 439 440 %(Spec) processes a specification defined in a specs file as *Spec: 441 442 The conditional text X in a %{S:X} or similar construct may contain 443 other nested % constructs or spaces, or even newlines. They are 444 processed as usual, as described above. Trailing white space in X is 445 ignored. White space may also appear anywhere on the left side of the 446 colon in these constructs, except between . or * and the corresponding 447 word. 448 449 The -O, -f, -m, and -W switches are handled specifically in these 450 constructs. If another value of -O or the negated form of a -f, -m, or 451 -W switch is found later in the command line, the earlier switch 452 value is ignored, except with {S*} where S is just one letter; this 453 passes all matching options. 454 455 The character | at the beginning of the predicate text is used to indicate 456 that a command should be piped to the following command, but only if -pipe 457 is specified. 458 459 Note that it is built into GCC which switches take arguments and which 460 do not. You might think it would be useful to generalize this to 461 allow each compiler's spec to say which switches take arguments. But 462 this cannot be done in a consistent fashion. GCC cannot even decide 463 which input files have been specified without knowing which switches 464 take arguments, and it must know which input files to compile in order 465 to tell which compilers to run. 466 467 GCC also knows implicitly that arguments starting in `-l' are to be 468 treated as compiler output files, and passed to the linker in their 469 proper position among the other output files. */ 470 471 /* Define the macros used for specs %a, %l, %L, %S, %C, %1. */ 472 473 /* config.h can define ASM_SPEC to provide extra args to the assembler 474 or extra switch-translations. */ 475 #ifndef ASM_SPEC 476 #define ASM_SPEC "" 477 #endif 478 479 /* config.h can define ASM_FINAL_SPEC to run a post processor after 480 the assembler has run. */ 481 #ifndef ASM_FINAL_SPEC 482 #define ASM_FINAL_SPEC "" 483 #endif 484 485 /* config.h can define CPP_SPEC to provide extra args to the C preprocessor 486 or extra switch-translations. */ 487 #ifndef CPP_SPEC 488 #define CPP_SPEC "" 489 #endif 490 491 /* config.h can define CC1_SPEC to provide extra args to cc1 and cc1plus 492 or extra switch-translations. */ 493 #ifndef CC1_SPEC 494 #define CC1_SPEC "" 495 #endif 496 497 /* config.h can define CC1PLUS_SPEC to provide extra args to cc1plus 498 or extra switch-translations. */ 499 #ifndef CC1PLUS_SPEC 500 #define CC1PLUS_SPEC "" 501 #endif 502 503 /* config.h can define LINK_SPEC to provide extra args to the linker 504 or extra switch-translations. */ 505 #ifndef LINK_SPEC 506 #define LINK_SPEC "" 507 #endif 508 509 /* config.h can define LIB_SPEC to override the default libraries. */ 510 #ifndef LIB_SPEC 511 #define LIB_SPEC "%{!shared:%{g*:-lg} %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}}" 512 #endif 513 514 /* mudflap specs */ 515 #ifndef MFWRAP_SPEC 516 /* XXX: valid only for GNU ld */ 517 /* XXX: should exactly match hooks provided by libmudflap.a */ 518 #define MFWRAP_SPEC " %{static: %{fmudflap|fmudflapth: \ 519 --wrap=malloc --wrap=free --wrap=calloc --wrap=realloc\ 520 --wrap=mmap --wrap=mmap64 --wrap=munmap --wrap=alloca\ 521 } %{fmudflapth: --wrap=pthread_create\ 522 }} %{fmudflap|fmudflapth: --wrap=main}" 523 #endif 524 #ifndef MFLIB_SPEC 525 #define MFLIB_SPEC "%{fmudflap|fmudflapth: -export-dynamic}" 526 #endif 527 528 /* When using -fsplit-stack we need to wrap pthread_create, in order 529 to initialize the stack guard. We always use wrapping, rather than 530 shared library ordering, and we keep the wrapper function in 531 libgcc. This is not yet a real spec, though it could become one; 532 it is currently just stuffed into LINK_SPEC. FIXME: This wrapping 533 only works with GNU ld and gold. FIXME: This is incompatible with 534 -fmudflap when linking statically, which wants to do its own 535 wrapping. */ 536 #define STACK_SPLIT_SPEC " %{fsplit-stack: --wrap=pthread_create}" 537 538 /* config.h can define LIBGCC_SPEC to override how and when libgcc.a is 539 included. */ 540 #ifndef LIBGCC_SPEC 541 #if defined(REAL_LIBGCC_SPEC) 542 #define LIBGCC_SPEC REAL_LIBGCC_SPEC 543 #elif defined(LINK_LIBGCC_SPECIAL_1) 544 /* Have gcc do the search for libgcc.a. */ 545 #define LIBGCC_SPEC "libgcc.a%s" 546 #else 547 #define LIBGCC_SPEC "-lgcc" 548 #endif 549 #endif 550 551 /* config.h can define STARTFILE_SPEC to override the default crt0 files. */ 552 #ifndef STARTFILE_SPEC 553 #define STARTFILE_SPEC \ 554 "%{!shared:%{pg:gcrt0%O%s}%{!pg:%{p:mcrt0%O%s}%{!p:crt0%O%s}}}" 555 #endif 556 557 /* config.h can define ENDFILE_SPEC to override the default crtn files. */ 558 #ifndef ENDFILE_SPEC 559 #define ENDFILE_SPEC "" 560 #endif 561 562 #ifndef LINKER_NAME 563 #define LINKER_NAME "collect2" 564 #endif 565 566 #ifdef HAVE_AS_DEBUG_PREFIX_MAP 567 #define ASM_MAP " %{fdebug-prefix-map=*:--debug-prefix-map %*}" 568 #else 569 #define ASM_MAP "" 570 #endif 571 572 /* Define ASM_DEBUG_SPEC to be a spec suitable for translating '-g' 573 to the assembler. */ 574 #ifndef ASM_DEBUG_SPEC 575 # if defined(DBX_DEBUGGING_INFO) && defined(DWARF2_DEBUGGING_INFO) \ 576 && defined(HAVE_AS_GDWARF2_DEBUG_FLAG) && defined(HAVE_AS_GSTABS_DEBUG_FLAG) 577 # define ASM_DEBUG_SPEC \ 578 (PREFERRED_DEBUGGING_TYPE == DBX_DEBUG \ 579 ? "%{!g0:%{gdwarf-2*:--gdwarf2}%{!gdwarf-2*:%{g*:--gstabs}}}" ASM_MAP \ 580 : "%{!g0:%{gstabs*:--gstabs}%{!gstabs*:%{g*:--gdwarf2}}}" ASM_MAP) 581 # else 582 # if defined(DBX_DEBUGGING_INFO) && defined(HAVE_AS_GSTABS_DEBUG_FLAG) 583 # define ASM_DEBUG_SPEC "%{g*:%{!g0:--gstabs}}" ASM_MAP 584 # endif 585 # if defined(DWARF2_DEBUGGING_INFO) && defined(HAVE_AS_GDWARF2_DEBUG_FLAG) 586 # define ASM_DEBUG_SPEC "%{g*:%{!g0:--gdwarf2}}" ASM_MAP 587 # endif 588 # endif 589 #endif 590 #ifndef ASM_DEBUG_SPEC 591 # define ASM_DEBUG_SPEC "" 592 #endif 593 594 /* Here is the spec for running the linker, after compiling all files. */ 595 596 /* This is overridable by the target in case they need to specify the 597 -lgcc and -lc order specially, yet not require them to override all 598 of LINK_COMMAND_SPEC. */ 599 #ifndef LINK_GCC_C_SEQUENCE_SPEC 600 #define LINK_GCC_C_SEQUENCE_SPEC "%G %L %G" 601 #endif 602 603 #ifndef LINK_SSP_SPEC 604 #ifdef TARGET_LIBC_PROVIDES_SSP 605 #define LINK_SSP_SPEC "%{fstack-protector:}" 606 #else 607 #define LINK_SSP_SPEC "%{fstack-protector|fstack-protector-all:-lssp_nonshared -lssp}" 608 #endif 609 #endif 610 611 #ifndef LINK_PIE_SPEC 612 #ifdef HAVE_LD_PIE 613 #define LINK_PIE_SPEC "%{pie:-pie} " 614 #else 615 #define LINK_PIE_SPEC "%{pie:} " 616 #endif 617 #endif 618 619 #ifndef LINK_BUILDID_SPEC 620 # if defined(HAVE_LD_BUILDID) && defined(ENABLE_LD_BUILDID) 621 # define LINK_BUILDID_SPEC "%{!r:--build-id} " 622 # endif 623 #endif 624 625 /* Conditional to test whether the LTO plugin is used or not. 626 FIXME: For slim LTO we will need to enable plugin unconditionally. This 627 still cause problems with PLUGIN_LD != LD and when plugin is built but 628 not useable. For GCC 4.6 we don't support slim LTO and thus we can enable 629 plugin only when LTO is enabled. We still honor explicit 630 -fuse-linker-plugin if the linker used understands -plugin. */ 631 632 /* The linker has some plugin support. */ 633 #if HAVE_LTO_PLUGIN > 0 634 /* The linker used has full plugin support, use LTO plugin by default. */ 635 #if HAVE_LTO_PLUGIN == 2 636 #define PLUGIN_COND "!fno-use-linker-plugin:%{flto|flto=*|fuse-linker-plugin" 637 #define PLUGIN_COND_CLOSE "}" 638 #else 639 /* The linker used has limited plugin support, use LTO plugin with explicit 640 -fuse-linker-plugin. */ 641 #define PLUGIN_COND "fuse-linker-plugin" 642 #define PLUGIN_COND_CLOSE "" 643 #endif 644 #define LINK_PLUGIN_SPEC \ 645 "%{"PLUGIN_COND": \ 646 -plugin %(linker_plugin_file) \ 647 -plugin-opt=%(lto_wrapper) \ 648 -plugin-opt=-fresolution=%u.res \ 649 %{!nostdlib:%{!nodefaultlibs:%:pass-through-libs(%(link_gcc_c_sequence))}} \ 650 }"PLUGIN_COND_CLOSE 651 #else 652 /* The linker used doesn't support -plugin, reject -fuse-linker-plugin. */ 653 #define LINK_PLUGIN_SPEC "%{fuse-linker-plugin:\ 654 %e-fuse-linker-plugin is not supported in this configuration}" 655 #endif 656 657 658 /* -u* was put back because both BSD and SysV seem to support it. */ 659 /* %{static:} simply prevents an error message if the target machine 660 doesn't handle -static. */ 661 /* We want %{T*} after %{L*} and %D so that it can be used to specify linker 662 scripts which exist in user specified directories, or in standard 663 directories. */ 664 /* We pass any -flto flags on to the linker, which is expected 665 to understand them. In practice, this means it had better be collect2. */ 666 /* %{e*} includes -export-dynamic; see comment in common.opt. */ 667 #ifndef LINK_COMMAND_SPEC 668 #define LINK_COMMAND_SPEC "\ 669 %{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\ 670 %(linker) " \ 671 LINK_PLUGIN_SPEC \ 672 "%{flto|flto=*:%<fcompare-debug*} \ 673 %{flto} %{flto=*} %l " LINK_PIE_SPEC \ 674 "%X %{o*} %{e*} %{N} %{n} %{r}\ 675 %{s} %{t} %{u*} %{z} %{Z} %{!nostdlib:%{!nostartfiles:%S}}\ 676 %{static:} %{L*} %(mfwrap) %(link_libgcc) %o\ 677 %{fopenmp|ftree-parallelize-loops=*:%:include(libgomp.spec)%(link_gomp)}\ 678 %{fgnu-tm:%:include(libitm.spec)%(link_itm)}\ 679 %(mflib) " STACK_SPLIT_SPEC "\ 680 %{fprofile-arcs|fprofile-generate*|coverage:-lgcov}\ 681 %{!nostdlib:%{!nodefaultlibs:%(link_ssp) %(link_gcc_c_sequence)}}\ 682 %{!nostdlib:%{!nostartfiles:%E}} %{T*} }}}}}}" 683 #endif 684 685 #ifndef LINK_LIBGCC_SPEC 686 /* Generate -L options for startfile prefix list. */ 687 # define LINK_LIBGCC_SPEC "%D" 688 #endif 689 690 #ifndef STARTFILE_PREFIX_SPEC 691 # define STARTFILE_PREFIX_SPEC "" 692 #endif 693 694 #ifndef SYSROOT_SPEC 695 # define SYSROOT_SPEC "--sysroot=%R" 696 #endif 697 698 #ifndef SYSROOT_SUFFIX_SPEC 699 # define SYSROOT_SUFFIX_SPEC "" 700 #endif 701 702 #ifndef SYSROOT_HEADERS_SUFFIX_SPEC 703 # define SYSROOT_HEADERS_SUFFIX_SPEC "" 704 #endif 705 706 static const char *asm_debug; 707 static const char *cpp_spec = CPP_SPEC; 708 static const char *cc1_spec = CC1_SPEC; 709 static const char *cc1plus_spec = CC1PLUS_SPEC; 710 static const char *link_gcc_c_sequence_spec = LINK_GCC_C_SEQUENCE_SPEC; 711 static const char *link_ssp_spec = LINK_SSP_SPEC; 712 static const char *asm_spec = ASM_SPEC; 713 static const char *asm_final_spec = ASM_FINAL_SPEC; 714 static const char *link_spec = LINK_SPEC; 715 static const char *lib_spec = LIB_SPEC; 716 static const char *mfwrap_spec = MFWRAP_SPEC; 717 static const char *mflib_spec = MFLIB_SPEC; 718 static const char *link_gomp_spec = ""; 719 static const char *libgcc_spec = LIBGCC_SPEC; 720 static const char *endfile_spec = ENDFILE_SPEC; 721 static const char *startfile_spec = STARTFILE_SPEC; 722 static const char *linker_name_spec = LINKER_NAME; 723 static const char *linker_plugin_file_spec = ""; 724 static const char *lto_wrapper_spec = ""; 725 static const char *lto_gcc_spec = ""; 726 static const char *link_command_spec = LINK_COMMAND_SPEC; 727 static const char *link_libgcc_spec = LINK_LIBGCC_SPEC; 728 static const char *startfile_prefix_spec = STARTFILE_PREFIX_SPEC; 729 static const char *sysroot_spec = SYSROOT_SPEC; 730 static const char *sysroot_suffix_spec = SYSROOT_SUFFIX_SPEC; 731 static const char *sysroot_hdrs_suffix_spec = SYSROOT_HEADERS_SUFFIX_SPEC; 732 static const char *self_spec = ""; 733 734 /* Standard options to cpp, cc1, and as, to reduce duplication in specs. 735 There should be no need to override these in target dependent files, 736 but we need to copy them to the specs file so that newer versions 737 of the GCC driver can correctly drive older tool chains with the 738 appropriate -B options. */ 739 740 /* When cpplib handles traditional preprocessing, get rid of this, and 741 call cc1 (or cc1obj in objc/lang-specs.h) from the main specs so 742 that we default the front end language better. */ 743 static const char *trad_capable_cpp = 744 "cc1 -E %{traditional|traditional-cpp:-traditional-cpp}"; 745 746 /* We don't wrap .d files in %W{} since a missing .d file, and 747 therefore no dependency entry, confuses make into thinking a .o 748 file that happens to exist is up-to-date. */ 749 static const char *cpp_unique_options = 750 "%{!Q:-quiet} %{nostdinc*} %{C} %{CC} %{v} %{I*&F*} %{P} %I\ 751 %{MD:-MD %{!o:%b.d}%{o*:%.d%*}}\ 752 %{MMD:-MMD %{!o:%b.d}%{o*:%.d%*}}\ 753 %{M} %{MM} %{MF*} %{MG} %{MP} %{MQ*} %{MT*}\ 754 %{!E:%{!M:%{!MM:%{!MT:%{!MQ:%{MD|MMD:%{o*:-MQ %*}}}}}}}\ 755 %{remap} %{g3|ggdb3|gstabs3|gcoff3|gxcoff3|gvms3:-dD}\ 756 %{!iplugindir*:%{fplugin*:%:find-plugindir()}}\ 757 %{H} %C %{D*&U*&A*} %{i*} %Z %i\ 758 %{fmudflap:-D_MUDFLAP -include mf-runtime.h}\ 759 %{fmudflapth:-D_MUDFLAP -D_MUDFLAPTH -include mf-runtime.h}\ 760 %{E|M|MM:%W{o*}}"; 761 762 /* This contains cpp options which are common with cc1_options and are passed 763 only when preprocessing only to avoid duplication. We pass the cc1 spec 764 options to the preprocessor so that it the cc1 spec may manipulate 765 options used to set target flags. Those special target flags settings may 766 in turn cause preprocessor symbols to be defined specially. */ 767 static const char *cpp_options = 768 "%(cpp_unique_options) %1 %{m*} %{std*&ansi&trigraphs} %{W*&pedantic*} %{w}\ 769 %{f*} %{g*:%{!g0:%{g*} %{!fno-working-directory:-fworking-directory}}} %{O*}\ 770 %{undef} %{save-temps*:-fpch-preprocess}"; 771 772 /* This contains cpp options which are not passed when the preprocessor 773 output will be used by another program. */ 774 static const char *cpp_debug_options = "%{d*}"; 775 776 /* NB: This is shared amongst all front-ends, except for Ada. */ 777 static const char *cc1_options = 778 "%{pg:%{fomit-frame-pointer:%e-pg and -fomit-frame-pointer are incompatible}}\ 779 %{!iplugindir*:%{fplugin*:%:find-plugindir()}}\ 780 %1 %{!Q:-quiet} %{!dumpbase:-dumpbase %B} %{d*} %{m*} %{aux-info*}\ 781 %{fcompare-debug-second:%:compare-debug-auxbase-opt(%b)} \ 782 %{!fcompare-debug-second:%{c|S:%{o*:-auxbase-strip %*}%{!o*:-auxbase %b}}}%{!c:%{!S:-auxbase %b}} \ 783 %{g*} %{O*} %{W*&pedantic*} %{w} %{std*&ansi&trigraphs}\ 784 %{v:-version} %{pg:-p} %{p} %{f*} %{undef}\ 785 %{Qn:-fno-ident} %{Qy:} %{-help:--help}\ 786 %{-target-help:--target-help}\ 787 %{-version:--version}\ 788 %{-help=*:--help=%*}\ 789 %{!fsyntax-only:%{S:%W{o*}%{!o*:-o %b.s}}}\ 790 %{fsyntax-only:-o %j} %{-param*}\ 791 %{fmudflap|fmudflapth:-fno-builtin -fno-merge-constants}\ 792 %{coverage:-fprofile-arcs -ftest-coverage}"; 793 794 static const char *asm_options = 795 "%{-target-help:%:print-asm-header()} " 796 #if HAVE_GNU_AS 797 /* If GNU AS is used, then convert -w (no warnings), -I, and -v 798 to the assembler equivalents. */ 799 "%{v} %{w:-W} %{I*} " 800 #endif 801 "%a %Y %{c:%W{o*}%{!o*:-o %w%b%O}}%{!c:-o %d%w%u%O}"; 802 803 static const char *invoke_as = 804 #ifdef AS_NEEDS_DASH_FOR_PIPED_INPUT 805 "%{!fwpa:\ 806 %{fcompare-debug=*|fdump-final-insns=*:%:compare-debug-dump-opt()}\ 807 %{!S:-o %|.s |\n as %(asm_options) %|.s %A }\ 808 }"; 809 #else 810 "%{!fwpa:\ 811 %{fcompare-debug=*|fdump-final-insns=*:%:compare-debug-dump-opt()}\ 812 %{!S:-o %|.s |\n as %(asm_options) %m.s %A }\ 813 }"; 814 #endif 815 816 /* Some compilers have limits on line lengths, and the multilib_select 817 and/or multilib_matches strings can be very long, so we build them at 818 run time. */ 819 static struct obstack multilib_obstack; 820 static const char *multilib_select; 821 static const char *multilib_matches; 822 static const char *multilib_defaults; 823 static const char *multilib_exclusions; 824 825 /* Check whether a particular argument is a default argument. */ 826 827 #ifndef MULTILIB_DEFAULTS 828 #define MULTILIB_DEFAULTS { "" } 829 #endif 830 831 static const char *const multilib_defaults_raw[] = MULTILIB_DEFAULTS; 832 833 #ifndef DRIVER_SELF_SPECS 834 #define DRIVER_SELF_SPECS "" 835 #endif 836 837 /* Adding -fopenmp should imply pthreads. This is particularly important 838 for targets that use different start files and suchlike. */ 839 #ifndef GOMP_SELF_SPECS 840 #define GOMP_SELF_SPECS "%{fopenmp|ftree-parallelize-loops=*: -pthread}" 841 #endif 842 843 /* Likewise for -fgnu-tm. */ 844 #ifndef GTM_SELF_SPECS 845 #define GTM_SELF_SPECS "%{fgnu-tm: -pthread}" 846 #endif 847 848 static const char *const driver_self_specs[] = { 849 "%{fdump-final-insns:-fdump-final-insns=.} %<fdump-final-insns", 850 DRIVER_SELF_SPECS, CONFIGURE_SPECS, GOMP_SELF_SPECS, GTM_SELF_SPECS 851 }; 852 853 #ifndef OPTION_DEFAULT_SPECS 854 #define OPTION_DEFAULT_SPECS { "", "" } 855 #endif 856 857 struct default_spec 858 { 859 const char *name; 860 const char *spec; 861 }; 862 863 static const struct default_spec 864 option_default_specs[] = { OPTION_DEFAULT_SPECS }; 865 866 struct user_specs 867 { 868 struct user_specs *next; 869 const char *filename; 870 }; 871 872 static struct user_specs *user_specs_head, *user_specs_tail; 873 874 875 /* Record the mapping from file suffixes for compilation specs. */ 876 877 struct compiler 878 { 879 const char *suffix; /* Use this compiler for input files 880 whose names end in this suffix. */ 881 882 const char *spec; /* To use this compiler, run this spec. */ 883 884 const char *cpp_spec; /* If non-NULL, substitute this spec 885 for `%C', rather than the usual 886 cpp_spec. */ 887 const int combinable; /* If nonzero, compiler can deal with 888 multiple source files at once (IMA). */ 889 const int needs_preprocessing; /* If nonzero, source files need to 890 be run through a preprocessor. */ 891 }; 892 893 /* Pointer to a vector of `struct compiler' that gives the spec for 894 compiling a file, based on its suffix. 895 A file that does not end in any of these suffixes will be passed 896 unchanged to the loader and nothing else will be done to it. 897 898 An entry containing two 0s is used to terminate the vector. 899 900 If multiple entries match a file, the last matching one is used. */ 901 902 static struct compiler *compilers; 903 904 /* Number of entries in `compilers', not counting the null terminator. */ 905 906 static int n_compilers; 907 908 /* The default list of file name suffixes and their compilation specs. */ 909 910 static const struct compiler default_compilers[] = 911 { 912 /* Add lists of suffixes of known languages here. If those languages 913 were not present when we built the driver, we will hit these copies 914 and be given a more meaningful error than "file not used since 915 linking is not done". */ 916 {".m", "#Objective-C", 0, 0, 0}, {".mi", "#Objective-C", 0, 0, 0}, 917 {".mm", "#Objective-C++", 0, 0, 0}, {".M", "#Objective-C++", 0, 0, 0}, 918 {".mii", "#Objective-C++", 0, 0, 0}, 919 {".cc", "#C++", 0, 0, 0}, {".cxx", "#C++", 0, 0, 0}, 920 {".cpp", "#C++", 0, 0, 0}, {".cp", "#C++", 0, 0, 0}, 921 {".c++", "#C++", 0, 0, 0}, {".C", "#C++", 0, 0, 0}, 922 {".CPP", "#C++", 0, 0, 0}, {".ii", "#C++", 0, 0, 0}, 923 {".ads", "#Ada", 0, 0, 0}, {".adb", "#Ada", 0, 0, 0}, 924 {".f", "#Fortran", 0, 0, 0}, {".F", "#Fortran", 0, 0, 0}, 925 {".for", "#Fortran", 0, 0, 0}, {".FOR", "#Fortran", 0, 0, 0}, 926 {".ftn", "#Fortran", 0, 0, 0}, {".FTN", "#Fortran", 0, 0, 0}, 927 {".fpp", "#Fortran", 0, 0, 0}, {".FPP", "#Fortran", 0, 0, 0}, 928 {".f90", "#Fortran", 0, 0, 0}, {".F90", "#Fortran", 0, 0, 0}, 929 {".f95", "#Fortran", 0, 0, 0}, {".F95", "#Fortran", 0, 0, 0}, 930 {".f03", "#Fortran", 0, 0, 0}, {".F03", "#Fortran", 0, 0, 0}, 931 {".f08", "#Fortran", 0, 0, 0}, {".F08", "#Fortran", 0, 0, 0}, 932 {".r", "#Ratfor", 0, 0, 0}, 933 {".p", "#Pascal", 0, 0, 0}, {".pas", "#Pascal", 0, 0, 0}, 934 {".java", "#Java", 0, 0, 0}, {".class", "#Java", 0, 0, 0}, 935 {".zip", "#Java", 0, 0, 0}, {".jar", "#Java", 0, 0, 0}, 936 {".go", "#Go", 0, 1, 0}, 937 /* Next come the entries for C. */ 938 {".c", "@c", 0, 0, 1}, 939 {"@c", 940 /* cc1 has an integrated ISO C preprocessor. We should invoke the 941 external preprocessor if -save-temps is given. */ 942 "%{E|M|MM:%(trad_capable_cpp) %(cpp_options) %(cpp_debug_options)}\ 943 %{!E:%{!M:%{!MM:\ 944 %{traditional:\ 945 %eGNU C no longer supports -traditional without -E}\ 946 %{save-temps*|traditional-cpp|no-integrated-cpp:%(trad_capable_cpp) \ 947 %(cpp_options) -o %{save-temps*:%b.i} %{!save-temps*:%g.i} \n\ 948 cc1 -fpreprocessed %{save-temps*:%b.i} %{!save-temps*:%g.i} \ 949 %(cc1_options)}\ 950 %{!save-temps*:%{!traditional-cpp:%{!no-integrated-cpp:\ 951 cc1 %(cpp_unique_options) %(cc1_options)}}}\ 952 %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 1}, 953 {"-", 954 "%{!E:%e-E or -x required when input is from standard input}\ 955 %(trad_capable_cpp) %(cpp_options) %(cpp_debug_options)", 0, 0, 0}, 956 {".h", "@c-header", 0, 0, 0}, 957 {"@c-header", 958 /* cc1 has an integrated ISO C preprocessor. We should invoke the 959 external preprocessor if -save-temps is given. */ 960 "%{E|M|MM:%(trad_capable_cpp) %(cpp_options) %(cpp_debug_options)}\ 961 %{!E:%{!M:%{!MM:\ 962 %{save-temps*|traditional-cpp|no-integrated-cpp:%(trad_capable_cpp) \ 963 %(cpp_options) -o %{save-temps*:%b.i} %{!save-temps*:%g.i} \n\ 964 cc1 -fpreprocessed %{save-temps*:%b.i} %{!save-temps*:%g.i} \ 965 %(cc1_options)\ 966 %{!fdump-ada-spec*:-o %g.s %{!o*:--output-pch=%i.gch}\ 967 %W{o*:--output-pch=%*}}%V}\ 968 %{!save-temps*:%{!traditional-cpp:%{!no-integrated-cpp:\ 969 cc1 %(cpp_unique_options) %(cc1_options)\ 970 %{!fdump-ada-spec*:-o %g.s %{!o*:--output-pch=%i.gch}\ 971 %W{o*:--output-pch=%*}}%V}}}}}}", 0, 0, 0}, 972 {".i", "@cpp-output", 0, 0, 0}, 973 {"@cpp-output", 974 "%{!M:%{!MM:%{!E:cc1 -fpreprocessed %i %(cc1_options) %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0}, 975 {".s", "@assembler", 0, 0, 0}, 976 {"@assembler", 977 "%{!M:%{!MM:%{!E:%{!S:as %(asm_debug) %(asm_options) %i %A }}}}", 0, 0, 0}, 978 {".sx", "@assembler-with-cpp", 0, 0, 0}, 979 {".S", "@assembler-with-cpp", 0, 0, 0}, 980 {"@assembler-with-cpp", 981 #ifdef AS_NEEDS_DASH_FOR_PIPED_INPUT 982 "%(trad_capable_cpp) -lang-asm %(cpp_options) -fno-directives-only\ 983 %{E|M|MM:%(cpp_debug_options)}\ 984 %{!M:%{!MM:%{!E:%{!S:-o %|.s |\n\ 985 as %(asm_debug) %(asm_options) %|.s %A }}}}" 986 #else 987 "%(trad_capable_cpp) -lang-asm %(cpp_options) -fno-directives-only\ 988 %{E|M|MM:%(cpp_debug_options)}\ 989 %{!M:%{!MM:%{!E:%{!S:-o %|.s |\n\ 990 as %(asm_debug) %(asm_options) %m.s %A }}}}" 991 #endif 992 , 0, 0, 0}, 993 994 #include "specs.h" 995 /* Mark end of table. */ 996 {0, 0, 0, 0, 0} 997 }; 998 999 /* Number of elements in default_compilers, not counting the terminator. */ 1000 1001 static const int n_default_compilers = ARRAY_SIZE (default_compilers) - 1; 1002 1003 typedef char *char_p; /* For DEF_VEC_P. */ 1004 DEF_VEC_P(char_p); 1005 DEF_VEC_ALLOC_P(char_p,heap); 1006 1007 /* A vector of options to give to the linker. 1008 These options are accumulated by %x, 1009 and substituted into the linker command with %X. */ 1010 static VEC(char_p,heap) *linker_options; 1011 1012 /* A vector of options to give to the assembler. 1013 These options are accumulated by -Wa, 1014 and substituted into the assembler command with %Y. */ 1015 static VEC(char_p,heap) *assembler_options; 1016 1017 /* A vector of options to give to the preprocessor. 1018 These options are accumulated by -Wp, 1019 and substituted into the preprocessor command with %Z. */ 1020 static VEC(char_p,heap) *preprocessor_options; 1021 1022 static char * 1023 skip_whitespace (char *p) 1024 { 1025 while (1) 1026 { 1027 /* A fully-blank line is a delimiter in the SPEC file and shouldn't 1028 be considered whitespace. */ 1029 if (p[0] == '\n' && p[1] == '\n' && p[2] == '\n') 1030 return p + 1; 1031 else if (*p == '\n' || *p == ' ' || *p == '\t') 1032 p++; 1033 else if (*p == '#') 1034 { 1035 while (*p != '\n') 1036 p++; 1037 p++; 1038 } 1039 else 1040 break; 1041 } 1042 1043 return p; 1044 } 1045 /* Structures to keep track of prefixes to try when looking for files. */ 1046 1047 struct prefix_list 1048 { 1049 const char *prefix; /* String to prepend to the path. */ 1050 struct prefix_list *next; /* Next in linked list. */ 1051 int require_machine_suffix; /* Don't use without machine_suffix. */ 1052 /* 2 means try both machine_suffix and just_machine_suffix. */ 1053 int priority; /* Sort key - priority within list. */ 1054 int os_multilib; /* 1 if OS multilib scheme should be used, 1055 0 for GCC multilib scheme. */ 1056 }; 1057 1058 struct path_prefix 1059 { 1060 struct prefix_list *plist; /* List of prefixes to try */ 1061 int max_len; /* Max length of a prefix in PLIST */ 1062 const char *name; /* Name of this list (used in config stuff) */ 1063 }; 1064 1065 /* List of prefixes to try when looking for executables. */ 1066 1067 static struct path_prefix exec_prefixes = { 0, 0, "exec" }; 1068 1069 /* List of prefixes to try when looking for startup (crt0) files. */ 1070 1071 static struct path_prefix startfile_prefixes = { 0, 0, "startfile" }; 1072 1073 /* List of prefixes to try when looking for include files. */ 1074 1075 static struct path_prefix include_prefixes = { 0, 0, "include" }; 1076 1077 /* Suffix to attach to directories searched for commands. 1078 This looks like `MACHINE/VERSION/'. */ 1079 1080 static const char *machine_suffix = 0; 1081 1082 /* Suffix to attach to directories searched for commands. 1083 This is just `MACHINE/'. */ 1084 1085 static const char *just_machine_suffix = 0; 1086 1087 /* Adjusted value of GCC_EXEC_PREFIX envvar. */ 1088 1089 static const char *gcc_exec_prefix; 1090 1091 /* Adjusted value of standard_libexec_prefix. */ 1092 1093 static const char *gcc_libexec_prefix; 1094 1095 /* Default prefixes to attach to command names. */ 1096 1097 #ifndef STANDARD_STARTFILE_PREFIX_1 1098 #define STANDARD_STARTFILE_PREFIX_1 "/lib/" 1099 #endif 1100 #ifndef STANDARD_STARTFILE_PREFIX_2 1101 #define STANDARD_STARTFILE_PREFIX_2 "/usr/lib/" 1102 #endif 1103 1104 #ifdef CROSS_DIRECTORY_STRUCTURE /* Don't use these prefixes for a cross compiler. */ 1105 #undef MD_EXEC_PREFIX 1106 #undef MD_STARTFILE_PREFIX 1107 #undef MD_STARTFILE_PREFIX_1 1108 #endif 1109 1110 /* If no prefixes defined, use the null string, which will disable them. */ 1111 #ifndef MD_EXEC_PREFIX 1112 #define MD_EXEC_PREFIX "" 1113 #endif 1114 #ifndef MD_STARTFILE_PREFIX 1115 #define MD_STARTFILE_PREFIX "" 1116 #endif 1117 #ifndef MD_STARTFILE_PREFIX_1 1118 #define MD_STARTFILE_PREFIX_1 "" 1119 #endif 1120 1121 /* These directories are locations set at configure-time based on the 1122 --prefix option provided to configure. Their initializers are 1123 defined in Makefile.in. These paths are not *directly* used when 1124 gcc_exec_prefix is set because, in that case, we know where the 1125 compiler has been installed, and use paths relative to that 1126 location instead. */ 1127 static const char *const standard_exec_prefix = STANDARD_EXEC_PREFIX; 1128 static const char *const standard_libexec_prefix = STANDARD_LIBEXEC_PREFIX; 1129 static const char *const standard_bindir_prefix = STANDARD_BINDIR_PREFIX; 1130 static const char *const standard_startfile_prefix = STANDARD_STARTFILE_PREFIX; 1131 1132 /* For native compilers, these are well-known paths containing 1133 components that may be provided by the system. For cross 1134 compilers, these paths are not used. */ 1135 static const char *md_exec_prefix = MD_EXEC_PREFIX; 1136 static const char *md_startfile_prefix = MD_STARTFILE_PREFIX; 1137 static const char *md_startfile_prefix_1 = MD_STARTFILE_PREFIX_1; 1138 static const char *const standard_startfile_prefix_1 1139 = STANDARD_STARTFILE_PREFIX_1; 1140 static const char *const standard_startfile_prefix_2 1141 = STANDARD_STARTFILE_PREFIX_2; 1142 1143 /* A relative path to be used in finding the location of tools 1144 relative to the driver. */ 1145 static const char *const tooldir_base_prefix = TOOLDIR_BASE_PREFIX; 1146 1147 /* Subdirectory to use for locating libraries. Set by 1148 set_multilib_dir based on the compilation options. */ 1149 1150 static const char *multilib_dir; 1151 1152 /* Subdirectory to use for locating libraries in OS conventions. Set by 1153 set_multilib_dir based on the compilation options. */ 1154 1155 static const char *multilib_os_dir; 1156 1157 /* Structure to keep track of the specs that have been defined so far. 1158 These are accessed using %(specname) in a compiler or link 1159 spec. */ 1160 1161 struct spec_list 1162 { 1163 /* The following 2 fields must be first */ 1164 /* to allow EXTRA_SPECS to be initialized */ 1165 const char *name; /* name of the spec. */ 1166 const char *ptr; /* available ptr if no static pointer */ 1167 1168 /* The following fields are not initialized */ 1169 /* by EXTRA_SPECS */ 1170 const char **ptr_spec; /* pointer to the spec itself. */ 1171 struct spec_list *next; /* Next spec in linked list. */ 1172 int name_len; /* length of the name */ 1173 int alloc_p; /* whether string was allocated */ 1174 }; 1175 1176 #define INIT_STATIC_SPEC(NAME,PTR) \ 1177 { NAME, NULL, PTR, (struct spec_list *) 0, sizeof (NAME) - 1, 0 } 1178 1179 /* List of statically defined specs. */ 1180 static struct spec_list static_specs[] = 1181 { 1182 INIT_STATIC_SPEC ("asm", &asm_spec), 1183 INIT_STATIC_SPEC ("asm_debug", &asm_debug), 1184 INIT_STATIC_SPEC ("asm_final", &asm_final_spec), 1185 INIT_STATIC_SPEC ("asm_options", &asm_options), 1186 INIT_STATIC_SPEC ("invoke_as", &invoke_as), 1187 INIT_STATIC_SPEC ("cpp", &cpp_spec), 1188 INIT_STATIC_SPEC ("cpp_options", &cpp_options), 1189 INIT_STATIC_SPEC ("cpp_debug_options", &cpp_debug_options), 1190 INIT_STATIC_SPEC ("cpp_unique_options", &cpp_unique_options), 1191 INIT_STATIC_SPEC ("trad_capable_cpp", &trad_capable_cpp), 1192 INIT_STATIC_SPEC ("cc1", &cc1_spec), 1193 INIT_STATIC_SPEC ("cc1_options", &cc1_options), 1194 INIT_STATIC_SPEC ("cc1plus", &cc1plus_spec), 1195 INIT_STATIC_SPEC ("link_gcc_c_sequence", &link_gcc_c_sequence_spec), 1196 INIT_STATIC_SPEC ("link_ssp", &link_ssp_spec), 1197 INIT_STATIC_SPEC ("endfile", &endfile_spec), 1198 INIT_STATIC_SPEC ("link", &link_spec), 1199 INIT_STATIC_SPEC ("lib", &lib_spec), 1200 INIT_STATIC_SPEC ("mfwrap", &mfwrap_spec), 1201 INIT_STATIC_SPEC ("mflib", &mflib_spec), 1202 INIT_STATIC_SPEC ("link_gomp", &link_gomp_spec), 1203 INIT_STATIC_SPEC ("libgcc", &libgcc_spec), 1204 INIT_STATIC_SPEC ("startfile", &startfile_spec), 1205 INIT_STATIC_SPEC ("cross_compile", &cross_compile), 1206 INIT_STATIC_SPEC ("version", &compiler_version), 1207 INIT_STATIC_SPEC ("multilib", &multilib_select), 1208 INIT_STATIC_SPEC ("multilib_defaults", &multilib_defaults), 1209 INIT_STATIC_SPEC ("multilib_extra", &multilib_extra), 1210 INIT_STATIC_SPEC ("multilib_matches", &multilib_matches), 1211 INIT_STATIC_SPEC ("multilib_exclusions", &multilib_exclusions), 1212 INIT_STATIC_SPEC ("multilib_options", &multilib_options), 1213 INIT_STATIC_SPEC ("linker", &linker_name_spec), 1214 INIT_STATIC_SPEC ("linker_plugin_file", &linker_plugin_file_spec), 1215 INIT_STATIC_SPEC ("lto_wrapper", <o_wrapper_spec), 1216 INIT_STATIC_SPEC ("lto_gcc", <o_gcc_spec), 1217 INIT_STATIC_SPEC ("link_libgcc", &link_libgcc_spec), 1218 INIT_STATIC_SPEC ("md_exec_prefix", &md_exec_prefix), 1219 INIT_STATIC_SPEC ("md_startfile_prefix", &md_startfile_prefix), 1220 INIT_STATIC_SPEC ("md_startfile_prefix_1", &md_startfile_prefix_1), 1221 INIT_STATIC_SPEC ("startfile_prefix_spec", &startfile_prefix_spec), 1222 INIT_STATIC_SPEC ("sysroot_spec", &sysroot_spec), 1223 INIT_STATIC_SPEC ("sysroot_suffix_spec", &sysroot_suffix_spec), 1224 INIT_STATIC_SPEC ("sysroot_hdrs_suffix_spec", &sysroot_hdrs_suffix_spec), 1225 INIT_STATIC_SPEC ("self_spec", &self_spec), 1226 }; 1227 1228 #ifdef EXTRA_SPECS /* additional specs needed */ 1229 /* Structure to keep track of just the first two args of a spec_list. 1230 That is all that the EXTRA_SPECS macro gives us. */ 1231 struct spec_list_1 1232 { 1233 const char *const name; 1234 const char *const ptr; 1235 }; 1236 1237 static const struct spec_list_1 extra_specs_1[] = { EXTRA_SPECS }; 1238 static struct spec_list *extra_specs = (struct spec_list *) 0; 1239 #endif 1240 1241 /* List of dynamically allocates specs that have been defined so far. */ 1242 1243 static struct spec_list *specs = (struct spec_list *) 0; 1244 1245 /* List of static spec functions. */ 1246 1247 static const struct spec_function static_spec_functions[] = 1248 { 1249 { "getenv", getenv_spec_function }, 1250 { "if-exists", if_exists_spec_function }, 1251 { "if-exists-else", if_exists_else_spec_function }, 1252 { "replace-outfile", replace_outfile_spec_function }, 1253 { "remove-outfile", remove_outfile_spec_function }, 1254 { "version-compare", version_compare_spec_function }, 1255 { "include", include_spec_function }, 1256 { "find-file", find_file_spec_function }, 1257 { "find-plugindir", find_plugindir_spec_function }, 1258 { "print-asm-header", print_asm_header_spec_function }, 1259 { "compare-debug-dump-opt", compare_debug_dump_opt_spec_function }, 1260 { "compare-debug-self-opt", compare_debug_self_opt_spec_function }, 1261 { "compare-debug-auxbase-opt", compare_debug_auxbase_opt_spec_function }, 1262 { "pass-through-libs", pass_through_libs_spec_func }, 1263 #ifdef EXTRA_SPEC_FUNCTIONS 1264 EXTRA_SPEC_FUNCTIONS 1265 #endif 1266 { 0, 0 } 1267 }; 1268 1269 static int processing_spec_function; 1270 1271 /* Add appropriate libgcc specs to OBSTACK, taking into account 1272 various permutations of -shared-libgcc, -shared, and such. */ 1273 1274 #if defined(ENABLE_SHARED_LIBGCC) && !defined(REAL_LIBGCC_SPEC) 1275 1276 #ifndef USE_LD_AS_NEEDED 1277 #define USE_LD_AS_NEEDED 0 1278 #endif 1279 1280 static void 1281 init_gcc_specs (struct obstack *obstack, const char *shared_name, 1282 const char *static_name, const char *eh_name) 1283 { 1284 char *buf; 1285 1286 buf = concat ("%{static|static-libgcc:", static_name, " ", eh_name, "}" 1287 "%{!static:%{!static-libgcc:" 1288 #if USE_LD_AS_NEEDED 1289 "%{!shared-libgcc:", 1290 static_name, " --as-needed ", shared_name, " --no-as-needed" 1291 "}" 1292 "%{shared-libgcc:", 1293 shared_name, "%{!shared: ", static_name, "}" 1294 "}" 1295 #else 1296 "%{!shared:" 1297 "%{!shared-libgcc:", static_name, " ", eh_name, "}" 1298 "%{shared-libgcc:", shared_name, " ", static_name, "}" 1299 "}" 1300 #ifdef LINK_EH_SPEC 1301 "%{shared:" 1302 "%{shared-libgcc:", shared_name, "}" 1303 "%{!shared-libgcc:", static_name, "}" 1304 "}" 1305 #else 1306 "%{shared:", shared_name, "}" 1307 #endif 1308 #endif 1309 "}}", NULL); 1310 1311 obstack_grow (obstack, buf, strlen (buf)); 1312 free (buf); 1313 } 1314 #endif /* ENABLE_SHARED_LIBGCC */ 1315 1316 /* Initialize the specs lookup routines. */ 1317 1318 static void 1319 init_spec (void) 1320 { 1321 struct spec_list *next = (struct spec_list *) 0; 1322 struct spec_list *sl = (struct spec_list *) 0; 1323 int i; 1324 1325 if (specs) 1326 return; /* Already initialized. */ 1327 1328 if (verbose_flag) 1329 fnotice (stderr, "Using built-in specs.\n"); 1330 1331 #ifdef EXTRA_SPECS 1332 extra_specs = XCNEWVEC (struct spec_list, ARRAY_SIZE (extra_specs_1)); 1333 1334 for (i = ARRAY_SIZE (extra_specs_1) - 1; i >= 0; i--) 1335 { 1336 sl = &extra_specs[i]; 1337 sl->name = extra_specs_1[i].name; 1338 sl->ptr = extra_specs_1[i].ptr; 1339 sl->next = next; 1340 sl->name_len = strlen (sl->name); 1341 sl->ptr_spec = &sl->ptr; 1342 next = sl; 1343 } 1344 #endif 1345 1346 for (i = ARRAY_SIZE (static_specs) - 1; i >= 0; i--) 1347 { 1348 sl = &static_specs[i]; 1349 sl->next = next; 1350 next = sl; 1351 } 1352 1353 #if defined(ENABLE_SHARED_LIBGCC) && !defined(REAL_LIBGCC_SPEC) 1354 /* ??? If neither -shared-libgcc nor --static-libgcc was 1355 seen, then we should be making an educated guess. Some proposed 1356 heuristics for ELF include: 1357 1358 (1) If "-Wl,--export-dynamic", then it's a fair bet that the 1359 program will be doing dynamic loading, which will likely 1360 need the shared libgcc. 1361 1362 (2) If "-ldl", then it's also a fair bet that we're doing 1363 dynamic loading. 1364 1365 (3) For each ET_DYN we're linking against (either through -lfoo 1366 or /some/path/foo.so), check to see whether it or one of 1367 its dependencies depends on a shared libgcc. 1368 1369 (4) If "-shared" 1370 1371 If the runtime is fixed to look for program headers instead 1372 of calling __register_frame_info at all, for each object, 1373 use the shared libgcc if any EH symbol referenced. 1374 1375 If crtstuff is fixed to not invoke __register_frame_info 1376 automatically, for each object, use the shared libgcc if 1377 any non-empty unwind section found. 1378 1379 Doing any of this probably requires invoking an external program to 1380 do the actual object file scanning. */ 1381 { 1382 const char *p = libgcc_spec; 1383 int in_sep = 1; 1384 1385 /* Transform the extant libgcc_spec into one that uses the shared libgcc 1386 when given the proper command line arguments. */ 1387 while (*p) 1388 { 1389 if (in_sep && *p == '-' && strncmp (p, "-lgcc", 5) == 0) 1390 { 1391 init_gcc_specs (&obstack, 1392 "-lgcc_s" 1393 #ifdef USE_LIBUNWIND_EXCEPTIONS 1394 " -lunwind" 1395 #endif 1396 , 1397 "-lgcc", 1398 "-lgcc_eh" 1399 #ifdef USE_LIBUNWIND_EXCEPTIONS 1400 # ifdef HAVE_LD_STATIC_DYNAMIC 1401 " %{!static:" LD_STATIC_OPTION "} -lunwind" 1402 " %{!static:" LD_DYNAMIC_OPTION "}" 1403 # else 1404 " -lunwind" 1405 # endif 1406 #endif 1407 ); 1408 1409 p += 5; 1410 in_sep = 0; 1411 } 1412 else if (in_sep && *p == 'l' && strncmp (p, "libgcc.a%s", 10) == 0) 1413 { 1414 /* Ug. We don't know shared library extensions. Hope that 1415 systems that use this form don't do shared libraries. */ 1416 init_gcc_specs (&obstack, 1417 "-lgcc_s", 1418 "libgcc.a%s", 1419 "libgcc_eh.a%s" 1420 #ifdef USE_LIBUNWIND_EXCEPTIONS 1421 " -lunwind" 1422 #endif 1423 ); 1424 p += 10; 1425 in_sep = 0; 1426 } 1427 else 1428 { 1429 obstack_1grow (&obstack, *p); 1430 in_sep = (*p == ' '); 1431 p += 1; 1432 } 1433 } 1434 1435 obstack_1grow (&obstack, '\0'); 1436 libgcc_spec = XOBFINISH (&obstack, const char *); 1437 } 1438 #endif 1439 #ifdef USE_AS_TRADITIONAL_FORMAT 1440 /* Prepend "--traditional-format" to whatever asm_spec we had before. */ 1441 { 1442 static const char tf[] = "--traditional-format "; 1443 obstack_grow (&obstack, tf, sizeof(tf) - 1); 1444 obstack_grow0 (&obstack, asm_spec, strlen (asm_spec)); 1445 asm_spec = XOBFINISH (&obstack, const char *); 1446 } 1447 #endif 1448 1449 #if defined LINK_EH_SPEC || defined LINK_BUILDID_SPEC || \ 1450 defined LINKER_HASH_STYLE 1451 # ifdef LINK_BUILDID_SPEC 1452 /* Prepend LINK_BUILDID_SPEC to whatever link_spec we had before. */ 1453 obstack_grow (&obstack, LINK_BUILDID_SPEC, sizeof(LINK_BUILDID_SPEC) - 1); 1454 # endif 1455 # ifdef LINK_EH_SPEC 1456 /* Prepend LINK_EH_SPEC to whatever link_spec we had before. */ 1457 obstack_grow (&obstack, LINK_EH_SPEC, sizeof(LINK_EH_SPEC) - 1); 1458 # endif 1459 # ifdef LINKER_HASH_STYLE 1460 /* Prepend --hash-style=LINKER_HASH_STYLE to whatever link_spec we had 1461 before. */ 1462 { 1463 static const char hash_style[] = "--hash-style="; 1464 obstack_grow (&obstack, hash_style, sizeof(hash_style) - 1); 1465 obstack_grow (&obstack, LINKER_HASH_STYLE, sizeof(LINKER_HASH_STYLE) - 1); 1466 obstack_1grow (&obstack, ' '); 1467 } 1468 # endif 1469 obstack_grow0 (&obstack, link_spec, strlen (link_spec)); 1470 link_spec = XOBFINISH (&obstack, const char *); 1471 #endif 1472 1473 specs = sl; 1474 } 1475 1476 /* Change the value of spec NAME to SPEC. If SPEC is empty, then the spec is 1477 removed; If the spec starts with a + then SPEC is added to the end of the 1478 current spec. */ 1479 1480 static void 1481 set_spec (const char *name, const char *spec) 1482 { 1483 struct spec_list *sl; 1484 const char *old_spec; 1485 int name_len = strlen (name); 1486 int i; 1487 1488 /* If this is the first call, initialize the statically allocated specs. */ 1489 if (!specs) 1490 { 1491 struct spec_list *next = (struct spec_list *) 0; 1492 for (i = ARRAY_SIZE (static_specs) - 1; i >= 0; i--) 1493 { 1494 sl = &static_specs[i]; 1495 sl->next = next; 1496 next = sl; 1497 } 1498 specs = sl; 1499 } 1500 1501 /* See if the spec already exists. */ 1502 for (sl = specs; sl; sl = sl->next) 1503 if (name_len == sl->name_len && !strcmp (sl->name, name)) 1504 break; 1505 1506 if (!sl) 1507 { 1508 /* Not found - make it. */ 1509 sl = XNEW (struct spec_list); 1510 sl->name = xstrdup (name); 1511 sl->name_len = name_len; 1512 sl->ptr_spec = &sl->ptr; 1513 sl->alloc_p = 0; 1514 *(sl->ptr_spec) = ""; 1515 sl->next = specs; 1516 specs = sl; 1517 } 1518 1519 old_spec = *(sl->ptr_spec); 1520 *(sl->ptr_spec) = ((spec[0] == '+' && ISSPACE ((unsigned char)spec[1])) 1521 ? concat (old_spec, spec + 1, NULL) 1522 : xstrdup (spec)); 1523 1524 #ifdef DEBUG_SPECS 1525 if (verbose_flag) 1526 fnotice (stderr, "Setting spec %s to '%s'\n\n", name, *(sl->ptr_spec)); 1527 #endif 1528 1529 /* Free the old spec. */ 1530 if (old_spec && sl->alloc_p) 1531 free (CONST_CAST(char *, old_spec)); 1532 1533 sl->alloc_p = 1; 1534 } 1535 1536 /* Accumulate a command (program name and args), and run it. */ 1537 1538 typedef const char *const_char_p; /* For DEF_VEC_P. */ 1539 DEF_VEC_P(const_char_p); 1540 DEF_VEC_ALLOC_P(const_char_p,heap); 1541 1542 /* Vector of pointers to arguments in the current line of specifications. */ 1543 1544 static VEC(const_char_p,heap) *argbuf; 1545 1546 /* Position in the argbuf vector containing the name of the output file 1547 (the value associated with the "-o" flag). */ 1548 1549 static int have_o_argbuf_index = 0; 1550 1551 /* Were the options -c, -S or -E passed. */ 1552 static int have_c = 0; 1553 1554 /* Was the option -o passed. */ 1555 static int have_o = 0; 1556 1557 /* This is the list of suffixes and codes (%g/%u/%U/%j) and the associated 1558 temp file. If the HOST_BIT_BUCKET is used for %j, no entry is made for 1559 it here. */ 1560 1561 static struct temp_name { 1562 const char *suffix; /* suffix associated with the code. */ 1563 int length; /* strlen (suffix). */ 1564 int unique; /* Indicates whether %g or %u/%U was used. */ 1565 const char *filename; /* associated filename. */ 1566 int filename_length; /* strlen (filename). */ 1567 struct temp_name *next; 1568 } *temp_names; 1569 1570 /* Number of commands executed so far. */ 1571 1572 static int execution_count; 1573 1574 /* Number of commands that exited with a signal. */ 1575 1576 static int signal_count; 1577 1578 /* Allocate the argument vector. */ 1579 1580 static void 1581 alloc_args (void) 1582 { 1583 argbuf = VEC_alloc (const_char_p, heap, 10); 1584 } 1585 1586 /* Clear out the vector of arguments (after a command is executed). */ 1587 1588 static void 1589 clear_args (void) 1590 { 1591 VEC_truncate (const_char_p, argbuf, 0); 1592 } 1593 1594 /* Add one argument to the vector at the end. 1595 This is done when a space is seen or at the end of the line. 1596 If DELETE_ALWAYS is nonzero, the arg is a filename 1597 and the file should be deleted eventually. 1598 If DELETE_FAILURE is nonzero, the arg is a filename 1599 and the file should be deleted if this compilation fails. */ 1600 1601 static void 1602 store_arg (const char *arg, int delete_always, int delete_failure) 1603 { 1604 VEC_safe_push (const_char_p, heap, argbuf, arg); 1605 1606 if (strcmp (arg, "-o") == 0) 1607 have_o_argbuf_index = VEC_length (const_char_p, argbuf); 1608 if (delete_always || delete_failure) 1609 { 1610 const char *p; 1611 /* If the temporary file we should delete is specified as 1612 part of a joined argument extract the filename. */ 1613 if (arg[0] == '-' 1614 && (p = strrchr (arg, '='))) 1615 arg = p + 1; 1616 record_temp_file (arg, delete_always, delete_failure); 1617 } 1618 } 1619 1620 /* Load specs from a file name named FILENAME, replacing occurrences of 1621 various different types of line-endings, \r\n, \n\r and just \r, with 1622 a single \n. */ 1623 1624 static char * 1625 load_specs (const char *filename) 1626 { 1627 int desc; 1628 int readlen; 1629 struct stat statbuf; 1630 char *buffer; 1631 char *buffer_p; 1632 char *specs; 1633 char *specs_p; 1634 1635 if (verbose_flag) 1636 fnotice (stderr, "Reading specs from %s\n", filename); 1637 1638 /* Open and stat the file. */ 1639 desc = open (filename, O_RDONLY, 0); 1640 if (desc < 0) 1641 pfatal_with_name (filename); 1642 if (stat (filename, &statbuf) < 0) 1643 pfatal_with_name (filename); 1644 1645 /* Read contents of file into BUFFER. */ 1646 buffer = XNEWVEC (char, statbuf.st_size + 1); 1647 readlen = read (desc, buffer, (unsigned) statbuf.st_size); 1648 if (readlen < 0) 1649 pfatal_with_name (filename); 1650 buffer[readlen] = 0; 1651 close (desc); 1652 1653 specs = XNEWVEC (char, readlen + 1); 1654 specs_p = specs; 1655 for (buffer_p = buffer; buffer_p && *buffer_p; buffer_p++) 1656 { 1657 int skip = 0; 1658 char c = *buffer_p; 1659 if (c == '\r') 1660 { 1661 if (buffer_p > buffer && *(buffer_p - 1) == '\n') /* \n\r */ 1662 skip = 1; 1663 else if (*(buffer_p + 1) == '\n') /* \r\n */ 1664 skip = 1; 1665 else /* \r */ 1666 c = '\n'; 1667 } 1668 if (! skip) 1669 *specs_p++ = c; 1670 } 1671 *specs_p = '\0'; 1672 1673 free (buffer); 1674 return (specs); 1675 } 1676 1677 /* Read compilation specs from a file named FILENAME, 1678 replacing the default ones. 1679 1680 A suffix which starts with `*' is a definition for 1681 one of the machine-specific sub-specs. The "suffix" should be 1682 *asm, *cc1, *cpp, *link, *startfile, etc. 1683 The corresponding spec is stored in asm_spec, etc., 1684 rather than in the `compilers' vector. 1685 1686 Anything invalid in the file is a fatal error. */ 1687 1688 static void 1689 read_specs (const char *filename, int main_p) 1690 { 1691 char *buffer; 1692 char *p; 1693 1694 buffer = load_specs (filename); 1695 1696 /* Scan BUFFER for specs, putting them in the vector. */ 1697 p = buffer; 1698 while (1) 1699 { 1700 char *suffix; 1701 char *spec; 1702 char *in, *out, *p1, *p2, *p3; 1703 1704 /* Advance P in BUFFER to the next nonblank nocomment line. */ 1705 p = skip_whitespace (p); 1706 if (*p == 0) 1707 break; 1708 1709 /* Is this a special command that starts with '%'? */ 1710 /* Don't allow this for the main specs file, since it would 1711 encourage people to overwrite it. */ 1712 if (*p == '%' && !main_p) 1713 { 1714 p1 = p; 1715 while (*p && *p != '\n') 1716 p++; 1717 1718 /* Skip '\n'. */ 1719 p++; 1720 1721 if (!strncmp (p1, "%include", sizeof ("%include") - 1) 1722 && (p1[sizeof "%include" - 1] == ' ' 1723 || p1[sizeof "%include" - 1] == '\t')) 1724 { 1725 char *new_filename; 1726 1727 p1 += sizeof ("%include"); 1728 while (*p1 == ' ' || *p1 == '\t') 1729 p1++; 1730 1731 if (*p1++ != '<' || p[-2] != '>') 1732 fatal_error ("specs %%include syntax malformed after " 1733 "%ld characters", 1734 (long) (p1 - buffer + 1)); 1735 1736 p[-2] = '\0'; 1737 new_filename = find_a_file (&startfile_prefixes, p1, R_OK, true); 1738 read_specs (new_filename ? new_filename : p1, FALSE); 1739 continue; 1740 } 1741 else if (!strncmp (p1, "%include_noerr", sizeof "%include_noerr" - 1) 1742 && (p1[sizeof "%include_noerr" - 1] == ' ' 1743 || p1[sizeof "%include_noerr" - 1] == '\t')) 1744 { 1745 char *new_filename; 1746 1747 p1 += sizeof "%include_noerr"; 1748 while (*p1 == ' ' || *p1 == '\t') 1749 p1++; 1750 1751 if (*p1++ != '<' || p[-2] != '>') 1752 fatal_error ("specs %%include syntax malformed after " 1753 "%ld characters", 1754 (long) (p1 - buffer + 1)); 1755 1756 p[-2] = '\0'; 1757 new_filename = find_a_file (&startfile_prefixes, p1, R_OK, true); 1758 if (new_filename) 1759 read_specs (new_filename, FALSE); 1760 else if (verbose_flag) 1761 fnotice (stderr, "could not find specs file %s\n", p1); 1762 continue; 1763 } 1764 else if (!strncmp (p1, "%rename", sizeof "%rename" - 1) 1765 && (p1[sizeof "%rename" - 1] == ' ' 1766 || p1[sizeof "%rename" - 1] == '\t')) 1767 { 1768 int name_len; 1769 struct spec_list *sl; 1770 struct spec_list *newsl; 1771 1772 /* Get original name. */ 1773 p1 += sizeof "%rename"; 1774 while (*p1 == ' ' || *p1 == '\t') 1775 p1++; 1776 1777 if (! ISALPHA ((unsigned char) *p1)) 1778 fatal_error ("specs %%rename syntax malformed after " 1779 "%ld characters", 1780 (long) (p1 - buffer)); 1781 1782 p2 = p1; 1783 while (*p2 && !ISSPACE ((unsigned char) *p2)) 1784 p2++; 1785 1786 if (*p2 != ' ' && *p2 != '\t') 1787 fatal_error ("specs %%rename syntax malformed after " 1788 "%ld characters", 1789 (long) (p2 - buffer)); 1790 1791 name_len = p2 - p1; 1792 *p2++ = '\0'; 1793 while (*p2 == ' ' || *p2 == '\t') 1794 p2++; 1795 1796 if (! ISALPHA ((unsigned char) *p2)) 1797 fatal_error ("specs %%rename syntax malformed after " 1798 "%ld characters", 1799 (long) (p2 - buffer)); 1800 1801 /* Get new spec name. */ 1802 p3 = p2; 1803 while (*p3 && !ISSPACE ((unsigned char) *p3)) 1804 p3++; 1805 1806 if (p3 != p - 1) 1807 fatal_error ("specs %%rename syntax malformed after " 1808 "%ld characters", 1809 (long) (p3 - buffer)); 1810 *p3 = '\0'; 1811 1812 for (sl = specs; sl; sl = sl->next) 1813 if (name_len == sl->name_len && !strcmp (sl->name, p1)) 1814 break; 1815 1816 if (!sl) 1817 fatal_error ("specs %s spec was not found to be renamed", p1); 1818 1819 if (strcmp (p1, p2) == 0) 1820 continue; 1821 1822 for (newsl = specs; newsl; newsl = newsl->next) 1823 if (strcmp (newsl->name, p2) == 0) 1824 fatal_error ("%s: attempt to rename spec %qs to " 1825 "already defined spec %qs", 1826 filename, p1, p2); 1827 1828 if (verbose_flag) 1829 { 1830 fnotice (stderr, "rename spec %s to %s\n", p1, p2); 1831 #ifdef DEBUG_SPECS 1832 fnotice (stderr, "spec is '%s'\n\n", *(sl->ptr_spec)); 1833 #endif 1834 } 1835 1836 set_spec (p2, *(sl->ptr_spec)); 1837 if (sl->alloc_p) 1838 free (CONST_CAST (char *, *(sl->ptr_spec))); 1839 1840 *(sl->ptr_spec) = ""; 1841 sl->alloc_p = 0; 1842 continue; 1843 } 1844 else 1845 fatal_error ("specs unknown %% command after %ld characters", 1846 (long) (p1 - buffer)); 1847 } 1848 1849 /* Find the colon that should end the suffix. */ 1850 p1 = p; 1851 while (*p1 && *p1 != ':' && *p1 != '\n') 1852 p1++; 1853 1854 /* The colon shouldn't be missing. */ 1855 if (*p1 != ':') 1856 fatal_error ("specs file malformed after %ld characters", 1857 (long) (p1 - buffer)); 1858 1859 /* Skip back over trailing whitespace. */ 1860 p2 = p1; 1861 while (p2 > buffer && (p2[-1] == ' ' || p2[-1] == '\t')) 1862 p2--; 1863 1864 /* Copy the suffix to a string. */ 1865 suffix = save_string (p, p2 - p); 1866 /* Find the next line. */ 1867 p = skip_whitespace (p1 + 1); 1868 if (p[1] == 0) 1869 fatal_error ("specs file malformed after %ld characters", 1870 (long) (p - buffer)); 1871 1872 p1 = p; 1873 /* Find next blank line or end of string. */ 1874 while (*p1 && !(*p1 == '\n' && (p1[1] == '\n' || p1[1] == '\0'))) 1875 p1++; 1876 1877 /* Specs end at the blank line and do not include the newline. */ 1878 spec = save_string (p, p1 - p); 1879 p = p1; 1880 1881 /* Delete backslash-newline sequences from the spec. */ 1882 in = spec; 1883 out = spec; 1884 while (*in != 0) 1885 { 1886 if (in[0] == '\\' && in[1] == '\n') 1887 in += 2; 1888 else if (in[0] == '#') 1889 while (*in && *in != '\n') 1890 in++; 1891 1892 else 1893 *out++ = *in++; 1894 } 1895 *out = 0; 1896 1897 if (suffix[0] == '*') 1898 { 1899 if (! strcmp (suffix, "*link_command")) 1900 link_command_spec = spec; 1901 else 1902 set_spec (suffix + 1, spec); 1903 } 1904 else 1905 { 1906 /* Add this pair to the vector. */ 1907 compilers 1908 = XRESIZEVEC (struct compiler, compilers, n_compilers + 2); 1909 1910 compilers[n_compilers].suffix = suffix; 1911 compilers[n_compilers].spec = spec; 1912 n_compilers++; 1913 memset (&compilers[n_compilers], 0, sizeof compilers[n_compilers]); 1914 } 1915 1916 if (*suffix == 0) 1917 link_command_spec = spec; 1918 } 1919 1920 if (link_command_spec == 0) 1921 fatal_error ("spec file has no spec for linking"); 1922 } 1923 1924 /* Record the names of temporary files we tell compilers to write, 1925 and delete them at the end of the run. */ 1926 1927 /* This is the common prefix we use to make temp file names. 1928 It is chosen once for each run of this program. 1929 It is substituted into a spec by %g or %j. 1930 Thus, all temp file names contain this prefix. 1931 In practice, all temp file names start with this prefix. 1932 1933 This prefix comes from the envvar TMPDIR if it is defined; 1934 otherwise, from the P_tmpdir macro if that is defined; 1935 otherwise, in /usr/tmp or /tmp; 1936 or finally the current directory if all else fails. */ 1937 1938 static const char *temp_filename; 1939 1940 /* Length of the prefix. */ 1941 1942 static int temp_filename_length; 1943 1944 /* Define the list of temporary files to delete. */ 1945 1946 struct temp_file 1947 { 1948 const char *name; 1949 struct temp_file *next; 1950 }; 1951 1952 /* Queue of files to delete on success or failure of compilation. */ 1953 static struct temp_file *always_delete_queue; 1954 /* Queue of files to delete on failure of compilation. */ 1955 static struct temp_file *failure_delete_queue; 1956 1957 /* Record FILENAME as a file to be deleted automatically. 1958 ALWAYS_DELETE nonzero means delete it if all compilation succeeds; 1959 otherwise delete it in any case. 1960 FAIL_DELETE nonzero means delete it if a compilation step fails; 1961 otherwise delete it in any case. */ 1962 1963 void 1964 record_temp_file (const char *filename, int always_delete, int fail_delete) 1965 { 1966 char *const name = xstrdup (filename); 1967 1968 if (always_delete) 1969 { 1970 struct temp_file *temp; 1971 for (temp = always_delete_queue; temp; temp = temp->next) 1972 if (! filename_cmp (name, temp->name)) 1973 goto already1; 1974 1975 temp = XNEW (struct temp_file); 1976 temp->next = always_delete_queue; 1977 temp->name = name; 1978 always_delete_queue = temp; 1979 1980 already1:; 1981 } 1982 1983 if (fail_delete) 1984 { 1985 struct temp_file *temp; 1986 for (temp = failure_delete_queue; temp; temp = temp->next) 1987 if (! filename_cmp (name, temp->name)) 1988 goto already2; 1989 1990 temp = XNEW (struct temp_file); 1991 temp->next = failure_delete_queue; 1992 temp->name = name; 1993 failure_delete_queue = temp; 1994 1995 already2:; 1996 } 1997 } 1998 1999 /* Delete all the temporary files whose names we previously recorded. */ 2000 2001 #ifndef DELETE_IF_ORDINARY 2002 #define DELETE_IF_ORDINARY(NAME,ST,VERBOSE_FLAG) \ 2003 do \ 2004 { \ 2005 if (stat (NAME, &ST) >= 0 && S_ISREG (ST.st_mode)) \ 2006 if (unlink (NAME) < 0) \ 2007 if (VERBOSE_FLAG) \ 2008 perror_with_name (NAME); \ 2009 } while (0) 2010 #endif 2011 2012 static void 2013 delete_if_ordinary (const char *name) 2014 { 2015 struct stat st; 2016 #ifdef DEBUG 2017 int i, c; 2018 2019 printf ("Delete %s? (y or n) ", name); 2020 fflush (stdout); 2021 i = getchar (); 2022 if (i != '\n') 2023 while ((c = getchar ()) != '\n' && c != EOF) 2024 ; 2025 2026 if (i == 'y' || i == 'Y') 2027 #endif /* DEBUG */ 2028 DELETE_IF_ORDINARY (name, st, verbose_flag); 2029 } 2030 2031 static void 2032 delete_temp_files (void) 2033 { 2034 struct temp_file *temp; 2035 2036 for (temp = always_delete_queue; temp; temp = temp->next) 2037 delete_if_ordinary (temp->name); 2038 always_delete_queue = 0; 2039 } 2040 2041 /* Delete all the files to be deleted on error. */ 2042 2043 static void 2044 delete_failure_queue (void) 2045 { 2046 struct temp_file *temp; 2047 2048 for (temp = failure_delete_queue; temp; temp = temp->next) 2049 delete_if_ordinary (temp->name); 2050 } 2051 2052 static void 2053 clear_failure_queue (void) 2054 { 2055 failure_delete_queue = 0; 2056 } 2057 2058 /* Call CALLBACK for each path in PATHS, breaking out early if CALLBACK 2059 returns non-NULL. 2060 If DO_MULTI is true iterate over the paths twice, first with multilib 2061 suffix then without, otherwise iterate over the paths once without 2062 adding a multilib suffix. When DO_MULTI is true, some attempt is made 2063 to avoid visiting the same path twice, but we could do better. For 2064 instance, /usr/lib/../lib is considered different from /usr/lib. 2065 At least EXTRA_SPACE chars past the end of the path passed to 2066 CALLBACK are available for use by the callback. 2067 CALLBACK_INFO allows extra parameters to be passed to CALLBACK. 2068 2069 Returns the value returned by CALLBACK. */ 2070 2071 static void * 2072 for_each_path (const struct path_prefix *paths, 2073 bool do_multi, 2074 size_t extra_space, 2075 void *(*callback) (char *, void *), 2076 void *callback_info) 2077 { 2078 struct prefix_list *pl; 2079 const char *multi_dir = NULL; 2080 const char *multi_os_dir = NULL; 2081 const char *multi_suffix; 2082 const char *just_multi_suffix; 2083 char *path = NULL; 2084 void *ret = NULL; 2085 bool skip_multi_dir = false; 2086 bool skip_multi_os_dir = false; 2087 2088 multi_suffix = machine_suffix; 2089 just_multi_suffix = just_machine_suffix; 2090 if (do_multi && multilib_dir && strcmp (multilib_dir, ".") != 0) 2091 { 2092 multi_dir = concat (multilib_dir, dir_separator_str, NULL); 2093 multi_suffix = concat (multi_suffix, multi_dir, NULL); 2094 just_multi_suffix = concat (just_multi_suffix, multi_dir, NULL); 2095 } 2096 if (do_multi && multilib_os_dir && strcmp (multilib_os_dir, ".") != 0) 2097 multi_os_dir = concat (multilib_os_dir, dir_separator_str, NULL); 2098 2099 while (1) 2100 { 2101 size_t multi_dir_len = 0; 2102 size_t multi_os_dir_len = 0; 2103 size_t suffix_len; 2104 size_t just_suffix_len; 2105 size_t len; 2106 2107 if (multi_dir) 2108 multi_dir_len = strlen (multi_dir); 2109 if (multi_os_dir) 2110 multi_os_dir_len = strlen (multi_os_dir); 2111 suffix_len = strlen (multi_suffix); 2112 just_suffix_len = strlen (just_multi_suffix); 2113 2114 if (path == NULL) 2115 { 2116 len = paths->max_len + extra_space + 1; 2117 if (suffix_len > multi_os_dir_len) 2118 len += suffix_len; 2119 else 2120 len += multi_os_dir_len; 2121 path = XNEWVEC (char, len); 2122 } 2123 2124 for (pl = paths->plist; pl != 0; pl = pl->next) 2125 { 2126 len = strlen (pl->prefix); 2127 memcpy (path, pl->prefix, len); 2128 2129 #if 0 /* MACHINE/VERSION isn't used anywhere DragonFly */ 2130 /* Look first in MACHINE/VERSION subdirectory. */ 2131 if (!skip_multi_dir) 2132 { 2133 memcpy (path + len, multi_suffix, suffix_len + 1); 2134 ret = callback (path, callback_info); 2135 if (ret) 2136 break; 2137 } 2138 #endif 2139 2140 /* Some paths are tried with just the machine (ie. target) 2141 subdir. This is used for finding as, ld, etc. */ 2142 if (!skip_multi_dir 2143 && pl->require_machine_suffix == 2) 2144 { 2145 memcpy (path + len, just_multi_suffix, just_suffix_len + 1); 2146 ret = callback (path, callback_info); 2147 if (ret) 2148 break; 2149 } 2150 2151 /* Now try the base path. */ 2152 if (!pl->require_machine_suffix 2153 && !(pl->os_multilib ? skip_multi_os_dir : skip_multi_dir)) 2154 { 2155 const char *this_multi; 2156 size_t this_multi_len; 2157 2158 if (pl->os_multilib) 2159 { 2160 this_multi = multi_os_dir; 2161 this_multi_len = multi_os_dir_len; 2162 } 2163 else 2164 { 2165 this_multi = multi_dir; 2166 this_multi_len = multi_dir_len; 2167 } 2168 2169 if (this_multi_len) 2170 memcpy (path + len, this_multi, this_multi_len + 1); 2171 else 2172 path[len] = '\0'; 2173 2174 ret = callback (path, callback_info); 2175 if (ret) 2176 break; 2177 } 2178 } 2179 if (pl) 2180 break; 2181 2182 if (multi_dir == NULL && multi_os_dir == NULL) 2183 break; 2184 2185 /* Run through the paths again, this time without multilibs. 2186 Don't repeat any we have already seen. */ 2187 if (multi_dir) 2188 { 2189 free (CONST_CAST (char *, multi_dir)); 2190 multi_dir = NULL; 2191 free (CONST_CAST (char *, multi_suffix)); 2192 multi_suffix = machine_suffix; 2193 free (CONST_CAST (char *, just_multi_suffix)); 2194 just_multi_suffix = just_machine_suffix; 2195 } 2196 else 2197 skip_multi_dir = true; 2198 if (multi_os_dir) 2199 { 2200 free (CONST_CAST (char *, multi_os_dir)); 2201 multi_os_dir = NULL; 2202 } 2203 else 2204 skip_multi_os_dir = true; 2205 } 2206 2207 if (multi_dir) 2208 { 2209 free (CONST_CAST (char *, multi_dir)); 2210 free (CONST_CAST (char *, multi_suffix)); 2211 free (CONST_CAST (char *, just_multi_suffix)); 2212 } 2213 if (multi_os_dir) 2214 free (CONST_CAST (char *, multi_os_dir)); 2215 if (ret != path) 2216 free (path); 2217 return ret; 2218 } 2219 2220 /* Callback for build_search_list. Adds path to obstack being built. */ 2221 2222 struct add_to_obstack_info { 2223 struct obstack *ob; 2224 bool check_dir; 2225 bool first_time; 2226 }; 2227 2228 static void * 2229 add_to_obstack (char *path, void *data) 2230 { 2231 struct add_to_obstack_info *info = (struct add_to_obstack_info *) data; 2232 2233 if (info->check_dir && !is_directory (path, false)) 2234 return NULL; 2235 2236 if (!info->first_time) 2237 obstack_1grow (info->ob, PATH_SEPARATOR); 2238 2239 obstack_grow (info->ob, path, strlen (path)); 2240 2241 info->first_time = false; 2242 return NULL; 2243 } 2244 2245 /* Add or change the value of an environment variable, outputting the 2246 change to standard error if in verbose mode. */ 2247 static void 2248 xputenv (const char *string) 2249 { 2250 if (verbose_flag) 2251 fnotice (stderr, "%s\n", string); 2252 putenv (CONST_CAST (char *, string)); 2253 } 2254 2255 /* Build a list of search directories from PATHS. 2256 PREFIX is a string to prepend to the list. 2257 If CHECK_DIR_P is true we ensure the directory exists. 2258 If DO_MULTI is true, multilib paths are output first, then 2259 non-multilib paths. 2260 This is used mostly by putenv_from_prefixes so we use `collect_obstack'. 2261 It is also used by the --print-search-dirs flag. */ 2262 2263 static char * 2264 build_search_list (const struct path_prefix *paths, const char *prefix, 2265 bool check_dir, bool do_multi) 2266 { 2267 struct add_to_obstack_info info; 2268 2269 info.ob = &collect_obstack; 2270 info.check_dir = check_dir; 2271 info.first_time = true; 2272 2273 obstack_grow (&collect_obstack, prefix, strlen (prefix)); 2274 obstack_1grow (&collect_obstack, '='); 2275 2276 for_each_path (paths, do_multi, 0, add_to_obstack, &info); 2277 2278 obstack_1grow (&collect_obstack, '\0'); 2279 return XOBFINISH (&collect_obstack, char *); 2280 } 2281 2282 /* Rebuild the COMPILER_PATH and LIBRARY_PATH environment variables 2283 for collect. */ 2284 2285 static void 2286 putenv_from_prefixes (const struct path_prefix *paths, const char *env_var, 2287 bool do_multi) 2288 { 2289 xputenv (build_search_list (paths, env_var, true, do_multi)); 2290 } 2291 2292 /* Check whether NAME can be accessed in MODE. This is like access, 2293 except that it never considers directories to be executable. */ 2294 2295 static int 2296 access_check (const char *name, int mode) 2297 { 2298 if (mode == X_OK) 2299 { 2300 struct stat st; 2301 2302 if (stat (name, &st) < 0 2303 || S_ISDIR (st.st_mode)) 2304 return -1; 2305 } 2306 2307 return access (name, mode); 2308 } 2309 2310 /* Callback for find_a_file. Appends the file name to the directory 2311 path. If the resulting file exists in the right mode, return the 2312 full pathname to the file. */ 2313 2314 struct file_at_path_info { 2315 const char *name; 2316 const char *suffix; 2317 int name_len; 2318 int suffix_len; 2319 int mode; 2320 }; 2321 2322 static void * 2323 file_at_path (char *path, void *data) 2324 { 2325 struct file_at_path_info *info = (struct file_at_path_info *) data; 2326 size_t len = strlen (path); 2327 2328 memcpy (path + len, info->name, info->name_len); 2329 len += info->name_len; 2330 2331 /* Some systems have a suffix for executable files. 2332 So try appending that first. */ 2333 if (info->suffix_len) 2334 { 2335 memcpy (path + len, info->suffix, info->suffix_len + 1); 2336 if (access_check (path, info->mode) == 0) 2337 return path; 2338 } 2339 2340 path[len] = '\0'; 2341 if (access_check (path, info->mode) == 0) 2342 return path; 2343 2344 return NULL; 2345 } 2346 2347 /* Search for NAME using the prefix list PREFIXES. MODE is passed to 2348 access to check permissions. If DO_MULTI is true, search multilib 2349 paths then non-multilib paths, otherwise do not search multilib paths. 2350 Return 0 if not found, otherwise return its name, allocated with malloc. */ 2351 2352 static char * 2353 find_a_file (const struct path_prefix *pprefix, const char *name, int mode, 2354 bool do_multi) 2355 { 2356 struct file_at_path_info info; 2357 2358 #ifdef DEFAULT_ASSEMBLER 2359 if (! strcmp (name, "as") && access (DEFAULT_ASSEMBLER, mode) == 0) 2360 return xstrdup (DEFAULT_ASSEMBLER); 2361 #endif 2362 2363 #ifdef DEFAULT_LINKER 2364 if (! strcmp(name, "ld") && access (DEFAULT_LINKER, mode) == 0) 2365 return xstrdup (DEFAULT_LINKER); 2366 #endif 2367 2368 /* Determine the filename to execute (special case for absolute paths). */ 2369 2370 if (IS_ABSOLUTE_PATH (name)) 2371 { 2372 if (access (name, mode) == 0) 2373 return xstrdup (name); 2374 2375 return NULL; 2376 } 2377 2378 info.name = name; 2379 info.suffix = (mode & X_OK) != 0 ? HOST_EXECUTABLE_SUFFIX : ""; 2380 info.name_len = strlen (info.name); 2381 info.suffix_len = strlen (info.suffix); 2382 info.mode = mode; 2383 2384 return (char*) for_each_path (pprefix, do_multi, 2385 info.name_len + info.suffix_len, 2386 file_at_path, &info); 2387 } 2388 2389 /* Ranking of prefixes in the sort list. -B prefixes are put before 2390 all others. */ 2391 2392 enum path_prefix_priority 2393 { 2394 PREFIX_PRIORITY_B_OPT, 2395 PREFIX_PRIORITY_LAST 2396 }; 2397 2398 /* Add an entry for PREFIX in PLIST. The PLIST is kept in ascending 2399 order according to PRIORITY. Within each PRIORITY, new entries are 2400 appended. 2401 2402 If WARN is nonzero, we will warn if no file is found 2403 through this prefix. WARN should point to an int 2404 which will be set to 1 if this entry is used. 2405 2406 COMPONENT is the value to be passed to update_path. 2407 2408 REQUIRE_MACHINE_SUFFIX is 1 if this prefix can't be used without 2409 the complete value of machine_suffix. 2410 2 means try both machine_suffix and just_machine_suffix. */ 2411 2412 static void 2413 add_prefix (struct path_prefix *pprefix, const char *prefix, 2414 const char *component, /* enum prefix_priority */ int priority, 2415 int require_machine_suffix, int os_multilib) 2416 { 2417 struct prefix_list *pl, **prev; 2418 int len; 2419 2420 for (prev = &pprefix->plist; 2421 (*prev) != NULL && (*prev)->priority <= priority; 2422 prev = &(*prev)->next) 2423 ; 2424 2425 /* Keep track of the longest prefix. */ 2426 2427 prefix = update_path (prefix, component); 2428 len = strlen (prefix); 2429 if (len > pprefix->max_len) 2430 pprefix->max_len = len; 2431 2432 pl = XNEW (struct prefix_list); 2433 pl->prefix = prefix; 2434 pl->require_machine_suffix = require_machine_suffix; 2435 pl->priority = priority; 2436 pl->os_multilib = os_multilib; 2437 2438 /* Insert after PREV. */ 2439 pl->next = (*prev); 2440 (*prev) = pl; 2441 } 2442 2443 /* Same as add_prefix, but prepending target_system_root to prefix. */ 2444 /* The target_system_root prefix has been relocated by gcc_exec_prefix. */ 2445 static void 2446 add_sysrooted_prefix (struct path_prefix *pprefix, const char *prefix, 2447 const char *component, 2448 /* enum prefix_priority */ int priority, 2449 int require_machine_suffix, int os_multilib) 2450 { 2451 if (!IS_ABSOLUTE_PATH (prefix)) 2452 fatal_error ("system path %qs is not absolute", prefix); 2453 2454 if (target_system_root) 2455 { 2456 char *sysroot_no_trailing_dir_separator = xstrdup (target_system_root); 2457 size_t sysroot_len = strlen (target_system_root); 2458 2459 if (sysroot_len > 0 2460 && target_system_root[sysroot_len - 1] == DIR_SEPARATOR) 2461 sysroot_no_trailing_dir_separator[sysroot_len - 1] = '\0'; 2462 2463 if (target_sysroot_suffix) 2464 prefix = concat (target_sysroot_suffix, prefix, NULL); 2465 prefix = concat (sysroot_no_trailing_dir_separator, prefix, NULL); 2466 free (sysroot_no_trailing_dir_separator); 2467 2468 /* We have to override this because GCC's notion of sysroot 2469 moves along with GCC. */ 2470 component = "GCC"; 2471 } 2472 2473 add_prefix (pprefix, prefix, component, priority, 2474 require_machine_suffix, os_multilib); 2475 } 2476 2477 /* Execute the command specified by the arguments on the current line of spec. 2478 When using pipes, this includes several piped-together commands 2479 with `|' between them. 2480 2481 Return 0 if successful, -1 if failed. */ 2482 2483 static int 2484 execute (void) 2485 { 2486 int i; 2487 int n_commands; /* # of command. */ 2488 char *string; 2489 struct pex_obj *pex; 2490 struct command 2491 { 2492 const char *prog; /* program name. */ 2493 const char **argv; /* vector of args. */ 2494 }; 2495 const char *arg; 2496 2497 struct command *commands; /* each command buffer with above info. */ 2498 2499 gcc_assert (!processing_spec_function); 2500 2501 if (wrapper_string) 2502 { 2503 string = find_a_file (&exec_prefixes, 2504 VEC_index (const_char_p, argbuf, 0), X_OK, false); 2505 if (string) 2506 VEC_replace (const_char_p, argbuf, 0, string); 2507 insert_wrapper (wrapper_string); 2508 } 2509 2510 /* Count # of piped commands. */ 2511 for (n_commands = 1, i = 0; VEC_iterate (const_char_p, argbuf, i, arg); i++) 2512 if (strcmp (arg, "|") == 0) 2513 n_commands++; 2514 2515 /* Get storage for each command. */ 2516 commands = (struct command *) alloca (n_commands * sizeof (struct command)); 2517 2518 /* Split argbuf into its separate piped processes, 2519 and record info about each one. 2520 Also search for the programs that are to be run. */ 2521 2522 VEC_safe_push (const_char_p, heap, argbuf, 0); 2523 2524 commands[0].prog = VEC_index (const_char_p, argbuf, 0); /* first command. */ 2525 commands[0].argv = VEC_address (const_char_p, argbuf); 2526 2527 if (!wrapper_string) 2528 { 2529 string = find_a_file (&exec_prefixes, commands[0].prog, X_OK, false); 2530 commands[0].argv[0] = (string) ? string : commands[0].argv[0]; 2531 } 2532 2533 for (n_commands = 1, i = 0; VEC_iterate (const_char_p, argbuf, i, arg); i++) 2534 if (arg && strcmp (arg, "|") == 0) 2535 { /* each command. */ 2536 #if defined (__MSDOS__) || defined (OS2) || defined (VMS) 2537 fatal_error ("-pipe not supported"); 2538 #endif 2539 VEC_replace (const_char_p, argbuf, i, 0); /* Termination of 2540 command args. */ 2541 commands[n_commands].prog = VEC_index (const_char_p, argbuf, i + 1); 2542 commands[n_commands].argv 2543 = &(VEC_address (const_char_p, argbuf))[i + 1]; 2544 string = find_a_file (&exec_prefixes, commands[n_commands].prog, 2545 X_OK, false); 2546 if (string) 2547 commands[n_commands].argv[0] = string; 2548 n_commands++; 2549 } 2550 2551 /* If -v, print what we are about to do, and maybe query. */ 2552 2553 if (verbose_flag) 2554 { 2555 /* For help listings, put a blank line between sub-processes. */ 2556 if (print_help_list) 2557 fputc ('\n', stderr); 2558 2559 /* Print each piped command as a separate line. */ 2560 for (i = 0; i < n_commands; i++) 2561 { 2562 const char *const *j; 2563 2564 if (verbose_only_flag) 2565 { 2566 for (j = commands[i].argv; *j; j++) 2567 { 2568 const char *p; 2569 for (p = *j; *p; ++p) 2570 if (!ISALNUM ((unsigned char) *p) 2571 && *p != '_' && *p != '/' && *p != '-' && *p != '.') 2572 break; 2573 if (*p || !*j) 2574 { 2575 fprintf (stderr, " \""); 2576 for (p = *j; *p; ++p) 2577 { 2578 if (*p == '"' || *p == '\\' || *p == '$') 2579 fputc ('\\', stderr); 2580 fputc (*p, stderr); 2581 } 2582 fputc ('"', stderr); 2583 } 2584 /* If it's empty, print "". */ 2585 else if (!**j) 2586 fprintf (stderr, " \"\""); 2587 else 2588 fprintf (stderr, " %s", *j); 2589 } 2590 } 2591 else 2592 for (j = commands[i].argv; *j; j++) 2593 /* If it's empty, print "". */ 2594 if (!**j) 2595 fprintf (stderr, " \"\""); 2596 else 2597 fprintf (stderr, " %s", *j); 2598 2599 /* Print a pipe symbol after all but the last command. */ 2600 if (i + 1 != n_commands) 2601 fprintf (stderr, " |"); 2602 fprintf (stderr, "\n"); 2603 } 2604 fflush (stderr); 2605 if (verbose_only_flag != 0) 2606 { 2607 /* verbose_only_flag should act as if the spec was 2608 executed, so increment execution_count before 2609 returning. This prevents spurious warnings about 2610 unused linker input files, etc. */ 2611 execution_count++; 2612 return 0; 2613 } 2614 #ifdef DEBUG 2615 fnotice (stderr, "\nGo ahead? (y or n) "); 2616 fflush (stderr); 2617 i = getchar (); 2618 if (i != '\n') 2619 while (getchar () != '\n') 2620 ; 2621 2622 if (i != 'y' && i != 'Y') 2623 return 0; 2624 #endif /* DEBUG */ 2625 } 2626 2627 #ifdef ENABLE_VALGRIND_CHECKING 2628 /* Run the each command through valgrind. To simplify prepending the 2629 path to valgrind and the option "-q" (for quiet operation unless 2630 something triggers), we allocate a separate argv array. */ 2631 2632 for (i = 0; i < n_commands; i++) 2633 { 2634 const char **argv; 2635 int argc; 2636 int j; 2637 2638 for (argc = 0; commands[i].argv[argc] != NULL; argc++) 2639 ; 2640 2641 argv = XALLOCAVEC (const char *, argc + 3); 2642 2643 argv[0] = VALGRIND_PATH; 2644 argv[1] = "-q"; 2645 for (j = 2; j < argc + 2; j++) 2646 argv[j] = commands[i].argv[j - 2]; 2647 argv[j] = NULL; 2648 2649 commands[i].argv = argv; 2650 commands[i].prog = argv[0]; 2651 } 2652 #endif 2653 2654 /* Run each piped subprocess. */ 2655 2656 pex = pex_init (PEX_USE_PIPES | ((report_times || report_times_to_file) 2657 ? PEX_RECORD_TIMES : 0), 2658 progname, temp_filename); 2659 if (pex == NULL) 2660 fatal_error ("pex_init failed: %m"); 2661 2662 for (i = 0; i < n_commands; i++) 2663 { 2664 const char *errmsg; 2665 int err; 2666 const char *string = commands[i].argv[0]; 2667 2668 errmsg = pex_run (pex, 2669 ((i + 1 == n_commands ? PEX_LAST : 0) 2670 | (string == commands[i].prog ? PEX_SEARCH : 0)), 2671 string, CONST_CAST (char **, commands[i].argv), 2672 NULL, NULL, &err); 2673 if (errmsg != NULL) 2674 { 2675 if (err == 0) 2676 fatal_error (errmsg); 2677 else 2678 { 2679 errno = err; 2680 pfatal_with_name (errmsg); 2681 } 2682 } 2683 2684 if (string != commands[i].prog) 2685 free (CONST_CAST (char *, string)); 2686 } 2687 2688 execution_count++; 2689 2690 /* Wait for all the subprocesses to finish. */ 2691 2692 { 2693 int *statuses; 2694 struct pex_time *times = NULL; 2695 int ret_code = 0; 2696 2697 statuses = (int *) alloca (n_commands * sizeof (int)); 2698 if (!pex_get_status (pex, n_commands, statuses)) 2699 fatal_error ("failed to get exit status: %m"); 2700 2701 if (report_times || report_times_to_file) 2702 { 2703 times = (struct pex_time *) alloca (n_commands * sizeof (struct pex_time)); 2704 if (!pex_get_times (pex, n_commands, times)) 2705 fatal_error ("failed to get process times: %m"); 2706 } 2707 2708 pex_free (pex); 2709 2710 for (i = 0; i < n_commands; ++i) 2711 { 2712 int status = statuses[i]; 2713 2714 if (WIFSIGNALED (status)) 2715 { 2716 #ifdef SIGPIPE 2717 /* SIGPIPE is a special case. It happens in -pipe mode 2718 when the compiler dies before the preprocessor is done, 2719 or the assembler dies before the compiler is done. 2720 There's generally been an error already, and this is 2721 just fallout. So don't generate another error unless 2722 we would otherwise have succeeded. */ 2723 if (WTERMSIG (status) == SIGPIPE 2724 && (signal_count || greatest_status >= MIN_FATAL_STATUS)) 2725 { 2726 signal_count++; 2727 ret_code = -1; 2728 } 2729 else 2730 #endif 2731 internal_error ("%s (program %s)", 2732 strsignal (WTERMSIG (status)), commands[i].prog); 2733 } 2734 else if (WIFEXITED (status) 2735 && WEXITSTATUS (status) >= MIN_FATAL_STATUS) 2736 { 2737 if (WEXITSTATUS (status) > greatest_status) 2738 greatest_status = WEXITSTATUS (status); 2739 ret_code = -1; 2740 } 2741 2742 if (report_times || report_times_to_file) 2743 { 2744 struct pex_time *pt = ×[i]; 2745 double ut, st; 2746 2747 ut = ((double) pt->user_seconds 2748 + (double) pt->user_microseconds / 1.0e6); 2749 st = ((double) pt->system_seconds 2750 + (double) pt->system_microseconds / 1.0e6); 2751 2752 if (ut + st != 0) 2753 { 2754 if (report_times) 2755 fnotice (stderr, "# %s %.2f %.2f\n", 2756 commands[i].prog, ut, st); 2757 2758 if (report_times_to_file) 2759 { 2760 int c = 0; 2761 const char *const *j; 2762 2763 fprintf (report_times_to_file, "%g %g", ut, st); 2764 2765 for (j = &commands[i].prog; *j; j = &commands[i].argv[++c]) 2766 { 2767 const char *p; 2768 for (p = *j; *p; ++p) 2769 if (*p == '"' || *p == '\\' || *p == '$' 2770 || ISSPACE (*p)) 2771 break; 2772 2773 if (*p) 2774 { 2775 fprintf (report_times_to_file, " \""); 2776 for (p = *j; *p; ++p) 2777 { 2778 if (*p == '"' || *p == '\\' || *p == '$') 2779 fputc ('\\', report_times_to_file); 2780 fputc (*p, report_times_to_file); 2781 } 2782 fputc ('"', report_times_to_file); 2783 } 2784 else 2785 fprintf (report_times_to_file, " %s", *j); 2786 } 2787 2788 fputc ('\n', report_times_to_file); 2789 } 2790 } 2791 } 2792 } 2793 2794 return ret_code; 2795 } 2796 } 2797 2798 /* Find all the switches given to us 2799 and make a vector describing them. 2800 The elements of the vector are strings, one per switch given. 2801 If a switch uses following arguments, then the `part1' field 2802 is the switch itself and the `args' field 2803 is a null-terminated vector containing the following arguments. 2804 Bits in the `live_cond' field are: 2805 SWITCH_LIVE to indicate this switch is true in a conditional spec. 2806 SWITCH_FALSE to indicate this switch is overridden by a later switch. 2807 SWITCH_IGNORE to indicate this switch should be ignored (used in %<S). 2808 SWITCH_IGNORE_PERMANENTLY to indicate this switch should be ignored 2809 in all do_spec calls afterwards. Used for %<S from self specs. 2810 The `validated' field is nonzero if any spec has looked at this switch; 2811 if it remains zero at the end of the run, it must be meaningless. */ 2812 2813 #define SWITCH_LIVE (1 << 0) 2814 #define SWITCH_FALSE (1 << 1) 2815 #define SWITCH_IGNORE (1 << 2) 2816 #define SWITCH_IGNORE_PERMANENTLY (1 << 3) 2817 #define SWITCH_KEEP_FOR_GCC (1 << 4) 2818 2819 struct switchstr 2820 { 2821 const char *part1; 2822 const char **args; 2823 unsigned int live_cond; 2824 unsigned char validated; 2825 unsigned char ordering; 2826 }; 2827 2828 static struct switchstr *switches; 2829 2830 static int n_switches; 2831 2832 static int n_switches_alloc; 2833 2834 /* Set to zero if -fcompare-debug is disabled, positive if it's 2835 enabled and we're running the first compilation, negative if it's 2836 enabled and we're running the second compilation. For most of the 2837 time, it's in the range -1..1, but it can be temporarily set to 2 2838 or 3 to indicate that the -fcompare-debug flags didn't come from 2839 the command-line, but rather from the GCC_COMPARE_DEBUG environment 2840 variable, until a synthesized -fcompare-debug flag is added to the 2841 command line. */ 2842 int compare_debug; 2843 2844 /* Set to nonzero if we've seen the -fcompare-debug-second flag. */ 2845 int compare_debug_second; 2846 2847 /* Set to the flags that should be passed to the second compilation in 2848 a -fcompare-debug compilation. */ 2849 const char *compare_debug_opt; 2850 2851 static struct switchstr *switches_debug_check[2]; 2852 2853 static int n_switches_debug_check[2]; 2854 2855 static int n_switches_alloc_debug_check[2]; 2856 2857 static char *debug_check_temp_file[2]; 2858 2859 /* Language is one of three things: 2860 2861 1) The name of a real programming language. 2862 2) NULL, indicating that no one has figured out 2863 what it is yet. 2864 3) '*', indicating that the file should be passed 2865 to the linker. */ 2866 struct infile 2867 { 2868 const char *name; 2869 const char *language; 2870 struct compiler *incompiler; 2871 bool compiled; 2872 bool preprocessed; 2873 }; 2874 2875 /* Also a vector of input files specified. */ 2876 2877 static struct infile *infiles; 2878 2879 int n_infiles; 2880 2881 static int n_infiles_alloc; 2882 2883 /* True if multiple input files are being compiled to a single 2884 assembly file. */ 2885 2886 static bool combine_inputs; 2887 2888 /* This counts the number of libraries added by lang_specific_driver, so that 2889 we can tell if there were any user supplied any files or libraries. */ 2890 2891 static int added_libraries; 2892 2893 /* And a vector of corresponding output files is made up later. */ 2894 2895 const char **outfiles; 2896 2897 #if defined(HAVE_TARGET_OBJECT_SUFFIX) || defined(HAVE_TARGET_EXECUTABLE_SUFFIX) 2898 2899 /* Convert NAME to a new name if it is the standard suffix. DO_EXE 2900 is true if we should look for an executable suffix. DO_OBJ 2901 is true if we should look for an object suffix. */ 2902 2903 static const char * 2904 convert_filename (const char *name, int do_exe ATTRIBUTE_UNUSED, 2905 int do_obj ATTRIBUTE_UNUSED) 2906 { 2907 #if defined(HAVE_TARGET_EXECUTABLE_SUFFIX) 2908 int i; 2909 #endif 2910 int len; 2911 2912 if (name == NULL) 2913 return NULL; 2914 2915 len = strlen (name); 2916 2917 #ifdef HAVE_TARGET_OBJECT_SUFFIX 2918 /* Convert x.o to x.obj if TARGET_OBJECT_SUFFIX is ".obj". */ 2919 if (do_obj && len > 2 2920 && name[len - 2] == '.' 2921 && name[len - 1] == 'o') 2922 { 2923 obstack_grow (&obstack, name, len - 2); 2924 obstack_grow0 (&obstack, TARGET_OBJECT_SUFFIX, strlen (TARGET_OBJECT_SUFFIX)); 2925 name = XOBFINISH (&obstack, const char *); 2926 } 2927 #endif 2928 2929 #if defined(HAVE_TARGET_EXECUTABLE_SUFFIX) 2930 /* If there is no filetype, make it the executable suffix (which includes 2931 the "."). But don't get confused if we have just "-o". */ 2932 if (! do_exe || TARGET_EXECUTABLE_SUFFIX[0] == 0 || (len == 2 && name[0] == '-')) 2933 return name; 2934 2935 for (i = len - 1; i >= 0; i--) 2936 if (IS_DIR_SEPARATOR (name[i])) 2937 break; 2938 2939 for (i++; i < len; i++) 2940 if (name[i] == '.') 2941 return name; 2942 2943 obstack_grow (&obstack, name, len); 2944 obstack_grow0 (&obstack, TARGET_EXECUTABLE_SUFFIX, 2945 strlen (TARGET_EXECUTABLE_SUFFIX)); 2946 name = XOBFINISH (&obstack, const char *); 2947 #endif 2948 2949 return name; 2950 } 2951 #endif 2952 2953 /* Display the command line switches accepted by gcc. */ 2954 static void 2955 display_help (void) 2956 { 2957 printf (_("Usage: %s [options] file...\n"), progname); 2958 fputs (_("Options:\n"), stdout); 2959 2960 fputs (_(" -pass-exit-codes Exit with highest error code from a phase\n"), stdout); 2961 fputs (_(" --help Display this information\n"), stdout); 2962 fputs (_(" --target-help Display target specific command line options\n"), stdout); 2963 fputs (_(" --help={common|optimizers|params|target|warnings|[^]{joined|separate|undocumented}}[,...]\n"), stdout); 2964 fputs (_(" Display specific types of command line options\n"), stdout); 2965 if (! verbose_flag) 2966 fputs (_(" (Use '-v --help' to display command line options of sub-processes)\n"), stdout); 2967 fputs (_(" --version Display compiler version information\n"), stdout); 2968 fputs (_(" -dumpspecs Display all of the built in spec strings\n"), stdout); 2969 fputs (_(" -dumpversion Display the version of the compiler\n"), stdout); 2970 fputs (_(" -dumpmachine Display the compiler's target processor\n"), stdout); 2971 fputs (_(" -print-search-dirs Display the directories in the compiler's search path\n"), stdout); 2972 fputs (_(" -print-libgcc-file-name Display the name of the compiler's companion library\n"), stdout); 2973 fputs (_(" -print-file-name=<lib> Display the full path to library <lib>\n"), stdout); 2974 fputs (_(" -print-prog-name=<prog> Display the full path to compiler component <prog>\n"), stdout); 2975 fputs (_(" -print-multi-directory Display the root directory for versions of libgcc\n"), stdout); 2976 fputs (_("\ 2977 -print-multi-lib Display the mapping between command line options and\n\ 2978 multiple library search directories\n"), stdout); 2979 fputs (_(" -print-multi-os-directory Display the relative path to OS libraries\n"), stdout); 2980 fputs (_(" -print-sysroot Display the target libraries directory\n"), stdout); 2981 fputs (_(" -print-sysroot-headers-suffix Display the sysroot suffix used to find headers\n"), stdout); 2982 fputs (_(" -Wa,<options> Pass comma-separated <options> on to the assembler\n"), stdout); 2983 fputs (_(" -Wp,<options> Pass comma-separated <options> on to the preprocessor\n"), stdout); 2984 fputs (_(" -Wl,<options> Pass comma-separated <options> on to the linker\n"), stdout); 2985 fputs (_(" -Xassembler <arg> Pass <arg> on to the assembler\n"), stdout); 2986 fputs (_(" -Xpreprocessor <arg> Pass <arg> on to the preprocessor\n"), stdout); 2987 fputs (_(" -Xlinker <arg> Pass <arg> on to the linker\n"), stdout); 2988 fputs (_(" -save-temps Do not delete intermediate files\n"), stdout); 2989 fputs (_(" -save-temps=<arg> Do not delete intermediate files\n"), stdout); 2990 fputs (_("\ 2991 -no-canonical-prefixes Do not canonicalize paths when building relative\n\ 2992 prefixes to other gcc components\n"), stdout); 2993 fputs (_(" -pipe Use pipes rather than intermediate files\n"), stdout); 2994 fputs (_(" -time Time the execution of each subprocess\n"), stdout); 2995 fputs (_(" -specs=<file> Override built-in specs with the contents of <file>\n"), stdout); 2996 fputs (_(" -std=<standard> Assume that the input sources are for <standard>\n"), stdout); 2997 fputs (_("\ 2998 --sysroot=<directory> Use <directory> as the root directory for headers\n\ 2999 and libraries\n"), stdout); 3000 fputs (_(" -B <directory> Add <directory> to the compiler's search paths\n"), stdout); 3001 fputs (_(" -v Display the programs invoked by the compiler\n"), stdout); 3002 fputs (_(" -### Like -v but options quoted and commands not executed\n"), stdout); 3003 fputs (_(" -E Preprocess only; do not compile, assemble or link\n"), stdout); 3004 fputs (_(" -S Compile only; do not assemble or link\n"), stdout); 3005 fputs (_(" -c Compile and assemble, but do not link\n"), stdout); 3006 fputs (_(" -o <file> Place the output into <file>\n"), stdout); 3007 fputs (_(" -pie Create a position independent executable\n"), stdout); 3008 fputs (_(" -shared Create a shared library\n"), stdout); 3009 fputs (_("\ 3010 -x <language> Specify the language of the following input files\n\ 3011 Permissible languages include: c c++ assembler none\n\ 3012 'none' means revert to the default behavior of\n\ 3013 guessing the language based on the file's extension\n\ 3014 "), stdout); 3015 3016 printf (_("\ 3017 \nOptions starting with -g, -f, -m, -O, -W, or --param are automatically\n\ 3018 passed on to the various sub-processes invoked by %s. In order to pass\n\ 3019 other options on to these processes the -W<letter> options must be used.\n\ 3020 "), progname); 3021 3022 /* The rest of the options are displayed by invocations of the various 3023 sub-processes. */ 3024 } 3025 3026 static void 3027 add_preprocessor_option (const char *option, int len) 3028 { 3029 VEC_safe_push (char_p, heap, preprocessor_options, 3030 save_string (option, len)); 3031 } 3032 3033 static void 3034 add_assembler_option (const char *option, int len) 3035 { 3036 VEC_safe_push (char_p, heap, assembler_options, save_string (option, len)); 3037 } 3038 3039 static void 3040 add_linker_option (const char *option, int len) 3041 { 3042 VEC_safe_push (char_p, heap, linker_options, save_string (option, len)); 3043 } 3044 3045 /* Allocate space for an input file in infiles. */ 3046 3047 static void 3048 alloc_infile (void) 3049 { 3050 if (n_infiles_alloc == 0) 3051 { 3052 n_infiles_alloc = 16; 3053 infiles = XNEWVEC (struct infile, n_infiles_alloc); 3054 } 3055 else if (n_infiles_alloc == n_infiles) 3056 { 3057 n_infiles_alloc *= 2; 3058 infiles = XRESIZEVEC (struct infile, infiles, n_infiles_alloc); 3059 } 3060 } 3061 3062 /* Store an input file with the given NAME and LANGUAGE in 3063 infiles. */ 3064 3065 static void 3066 add_infile (const char *name, const char *language) 3067 { 3068 alloc_infile (); 3069 infiles[n_infiles].name = name; 3070 infiles[n_infiles++].language = language; 3071 } 3072 3073 /* Allocate space for a switch in switches. */ 3074 3075 static void 3076 alloc_switch (void) 3077 { 3078 if (n_switches_alloc == 0) 3079 { 3080 n_switches_alloc = 16; 3081 switches = XNEWVEC (struct switchstr, n_switches_alloc); 3082 } 3083 else if (n_switches_alloc == n_switches) 3084 { 3085 n_switches_alloc *= 2; 3086 switches = XRESIZEVEC (struct switchstr, switches, n_switches_alloc); 3087 } 3088 } 3089 3090 /* Save an option OPT with N_ARGS arguments in array ARGS, marking it 3091 as validated if VALIDATED. */ 3092 3093 static void 3094 save_switch (const char *opt, size_t n_args, const char *const *args, 3095 bool validated) 3096 { 3097 alloc_switch (); 3098 switches[n_switches].part1 = opt + 1; 3099 if (n_args == 0) 3100 switches[n_switches].args = 0; 3101 else 3102 { 3103 switches[n_switches].args = XNEWVEC (const char *, n_args + 1); 3104 memcpy (switches[n_switches].args, args, n_args * sizeof (const char *)); 3105 switches[n_switches].args[n_args] = NULL; 3106 } 3107 3108 switches[n_switches].live_cond = 0; 3109 switches[n_switches].validated = validated; 3110 switches[n_switches].ordering = 0; 3111 n_switches++; 3112 } 3113 3114 /* Handle an option DECODED that is unknown to the option-processing 3115 machinery. */ 3116 3117 static bool 3118 driver_unknown_option_callback (const struct cl_decoded_option *decoded) 3119 { 3120 const char *opt = decoded->arg; 3121 if (opt[1] == 'W' && opt[2] == 'n' && opt[3] == 'o' && opt[4] == '-' 3122 && !(decoded->errors & CL_ERR_NEGATIVE)) 3123 { 3124 /* Leave unknown -Wno-* options for the compiler proper, to be 3125 diagnosed only if there are warnings. */ 3126 save_switch (decoded->canonical_option[0], 3127 decoded->canonical_option_num_elements - 1, 3128 &decoded->canonical_option[1], false); 3129 return false; 3130 } 3131 else 3132 return true; 3133 } 3134 3135 /* Handle an option DECODED that is not marked as CL_DRIVER. 3136 LANG_MASK will always be CL_DRIVER. */ 3137 3138 static void 3139 driver_wrong_lang_callback (const struct cl_decoded_option *decoded, 3140 unsigned int lang_mask ATTRIBUTE_UNUSED) 3141 { 3142 /* At this point, non-driver options are accepted (and expected to 3143 be passed down by specs) unless marked to be rejected by the 3144 driver. Options to be rejected by the driver but accepted by the 3145 compilers proper are treated just like completely unknown 3146 options. */ 3147 const struct cl_option *option = &cl_options[decoded->opt_index]; 3148 3149 if (option->cl_reject_driver) 3150 error ("unrecognized command line option %qs", 3151 decoded->orig_option_with_args_text); 3152 else 3153 save_switch (decoded->canonical_option[0], 3154 decoded->canonical_option_num_elements - 1, 3155 &decoded->canonical_option[1], false); 3156 } 3157 3158 static const char *spec_lang = 0; 3159 static int last_language_n_infiles; 3160 3161 /* Handle a driver option; arguments and return value as for 3162 handle_option. */ 3163 3164 static bool 3165 driver_handle_option (struct gcc_options *opts, 3166 struct gcc_options *opts_set, 3167 const struct cl_decoded_option *decoded, 3168 unsigned int lang_mask ATTRIBUTE_UNUSED, int kind, 3169 location_t loc, 3170 const struct cl_option_handlers *handlers ATTRIBUTE_UNUSED, 3171 diagnostic_context *dc) 3172 { 3173 size_t opt_index = decoded->opt_index; 3174 const char *arg = decoded->arg; 3175 const char *compare_debug_replacement_opt; 3176 int value = decoded->value; 3177 bool validated = false; 3178 bool do_save = true; 3179 3180 gcc_assert (opts == &global_options); 3181 gcc_assert (opts_set == &global_options_set); 3182 gcc_assert (kind == DK_UNSPECIFIED); 3183 gcc_assert (loc == UNKNOWN_LOCATION); 3184 gcc_assert (dc == global_dc); 3185 3186 switch (opt_index) 3187 { 3188 case OPT_dumpspecs: 3189 { 3190 struct spec_list *sl; 3191 init_spec (); 3192 for (sl = specs; sl; sl = sl->next) 3193 printf ("*%s:\n%s\n\n", sl->name, *(sl->ptr_spec)); 3194 if (link_command_spec) 3195 printf ("*link_command:\n%s\n\n", link_command_spec); 3196 exit (0); 3197 } 3198 3199 case OPT_dumpversion: 3200 printf ("%s\n", spec_version); 3201 exit (0); 3202 3203 case OPT_dumpmachine: 3204 printf ("%s\n", spec_machine); 3205 exit (0); 3206 3207 case OPT__version: 3208 print_version = 1; 3209 3210 /* CPP driver cannot obtain switch from cc1_options. */ 3211 if (is_cpp_driver) 3212 add_preprocessor_option ("--version", strlen ("--version")); 3213 add_assembler_option ("--version", strlen ("--version")); 3214 add_linker_option ("--version", strlen ("--version")); 3215 break; 3216 3217 case OPT__help: 3218 print_help_list = 1; 3219 3220 /* CPP driver cannot obtain switch from cc1_options. */ 3221 if (is_cpp_driver) 3222 add_preprocessor_option ("--help", 6); 3223 add_assembler_option ("--help", 6); 3224 add_linker_option ("--help", 6); 3225 break; 3226 3227 case OPT__help_: 3228 print_subprocess_help = 2; 3229 break; 3230 3231 case OPT__target_help: 3232 print_subprocess_help = 1; 3233 3234 /* CPP driver cannot obtain switch from cc1_options. */ 3235 if (is_cpp_driver) 3236 add_preprocessor_option ("--target-help", 13); 3237 add_assembler_option ("--target-help", 13); 3238 add_linker_option ("--target-help", 13); 3239 break; 3240 3241 case OPT_pass_exit_codes: 3242 case OPT_print_search_dirs: 3243 case OPT_print_file_name_: 3244 case OPT_print_prog_name_: 3245 case OPT_print_multi_lib: 3246 case OPT_print_multi_directory: 3247 case OPT_print_sysroot: 3248 case OPT_print_multi_os_directory: 3249 case OPT_print_sysroot_headers_suffix: 3250 case OPT_time: 3251 case OPT_wrapper: 3252 /* These options set the variables specified in common.opt 3253 automatically, and do not need to be saved for spec 3254 processing. */ 3255 do_save = false; 3256 break; 3257 3258 case OPT_print_libgcc_file_name: 3259 print_file_name = "libgcc.a"; 3260 do_save = false; 3261 break; 3262 3263 case OPT_fcompare_debug_second: 3264 compare_debug_second = 1; 3265 break; 3266 3267 case OPT_fcompare_debug: 3268 switch (value) 3269 { 3270 case 0: 3271 compare_debug_replacement_opt = "-fcompare-debug="; 3272 arg = ""; 3273 goto compare_debug_with_arg; 3274 3275 case 1: 3276 compare_debug_replacement_opt = "-fcompare-debug=-gtoggle"; 3277 arg = "-gtoggle"; 3278 goto compare_debug_with_arg; 3279 3280 default: 3281 gcc_unreachable (); 3282 } 3283 break; 3284 3285 case OPT_fcompare_debug_: 3286 compare_debug_replacement_opt = decoded->canonical_option[0]; 3287 compare_debug_with_arg: 3288 gcc_assert (decoded->canonical_option_num_elements == 1); 3289 gcc_assert (arg != NULL); 3290 if (*arg) 3291 compare_debug = 1; 3292 else 3293 compare_debug = -1; 3294 if (compare_debug < 0) 3295 compare_debug_opt = NULL; 3296 else 3297 compare_debug_opt = arg; 3298 save_switch (compare_debug_replacement_opt, 0, NULL, validated); 3299 return true; 3300 3301 case OPT_Wa_: 3302 { 3303 int prev, j; 3304 /* Pass the rest of this option to the assembler. */ 3305 3306 /* Split the argument at commas. */ 3307 prev = 0; 3308 for (j = 0; arg[j]; j++) 3309 if (arg[j] == ',') 3310 { 3311 add_assembler_option (arg + prev, j - prev); 3312 prev = j + 1; 3313 } 3314 3315 /* Record the part after the last comma. */ 3316 add_assembler_option (arg + prev, j - prev); 3317 } 3318 do_save = false; 3319 break; 3320 3321 case OPT_Wp_: 3322 { 3323 int prev, j; 3324 /* Pass the rest of this option to the preprocessor. */ 3325 3326 /* Split the argument at commas. */ 3327 prev = 0; 3328 for (j = 0; arg[j]; j++) 3329 if (arg[j] == ',') 3330 { 3331 add_preprocessor_option (arg + prev, j - prev); 3332 prev = j + 1; 3333 } 3334 3335 /* Record the part after the last comma. */ 3336 add_preprocessor_option (arg + prev, j - prev); 3337 } 3338 do_save = false; 3339 break; 3340 3341 case OPT_Wl_: 3342 { 3343 int prev, j; 3344 /* Split the argument at commas. */ 3345 prev = 0; 3346 for (j = 0; arg[j]; j++) 3347 if (arg[j] == ',') 3348 { 3349 add_infile (save_string (arg + prev, j - prev), "*"); 3350 prev = j + 1; 3351 } 3352 /* Record the part after the last comma. */ 3353 add_infile (arg + prev, "*"); 3354 } 3355 do_save = false; 3356 break; 3357 3358 case OPT_Xlinker: 3359 add_infile (arg, "*"); 3360 do_save = false; 3361 break; 3362 3363 case OPT_Xpreprocessor: 3364 add_preprocessor_option (arg, strlen (arg)); 3365 do_save = false; 3366 break; 3367 3368 case OPT_Xassembler: 3369 add_assembler_option (arg, strlen (arg)); 3370 do_save = false; 3371 break; 3372 3373 case OPT_l: 3374 /* POSIX allows separation of -l and the lib arg; canonicalize 3375 by concatenating -l with its arg */ 3376 add_infile (concat ("-l", arg, NULL), "*"); 3377 do_save = false; 3378 break; 3379 3380 case OPT_L: 3381 /* Similarly, canonicalize -L for linkers that may not accept 3382 separate arguments. */ 3383 save_switch (concat ("-L", arg, NULL), 0, NULL, validated); 3384 return true; 3385 3386 case OPT_F: 3387 /* Likewise -F. */ 3388 save_switch (concat ("-F", arg, NULL), 0, NULL, validated); 3389 return true; 3390 3391 case OPT_save_temps: 3392 save_temps_flag = SAVE_TEMPS_CWD; 3393 validated = true; 3394 break; 3395 3396 case OPT_save_temps_: 3397 if (strcmp (arg, "cwd") == 0) 3398 save_temps_flag = SAVE_TEMPS_CWD; 3399 else if (strcmp (arg, "obj") == 0 3400 || strcmp (arg, "object") == 0) 3401 save_temps_flag = SAVE_TEMPS_OBJ; 3402 else 3403 fatal_error ("%qs is an unknown -save-temps option", 3404 decoded->orig_option_with_args_text); 3405 break; 3406 3407 case OPT_no_canonical_prefixes: 3408 /* Already handled as a special case, so ignored here. */ 3409 do_save = false; 3410 break; 3411 3412 case OPT_pipe: 3413 validated = true; 3414 /* These options set the variables specified in common.opt 3415 automatically, but do need to be saved for spec 3416 processing. */ 3417 break; 3418 3419 case OPT_specs_: 3420 { 3421 struct user_specs *user = XNEW (struct user_specs); 3422 3423 user->next = (struct user_specs *) 0; 3424 user->filename = arg; 3425 if (user_specs_tail) 3426 user_specs_tail->next = user; 3427 else 3428 user_specs_head = user; 3429 user_specs_tail = user; 3430 } 3431 do_save = false; 3432 break; 3433 3434 case OPT__sysroot_: 3435 target_system_root = arg; 3436 target_system_root_changed = 1; 3437 do_save = false; 3438 break; 3439 3440 case OPT_time_: 3441 if (report_times_to_file) 3442 fclose (report_times_to_file); 3443 report_times_to_file = fopen (arg, "a"); 3444 do_save = false; 3445 break; 3446 3447 case OPT____: 3448 /* "-###" 3449 This is similar to -v except that there is no execution 3450 of the commands and the echoed arguments are quoted. It 3451 is intended for use in shell scripts to capture the 3452 driver-generated command line. */ 3453 verbose_only_flag++; 3454 verbose_flag = 1; 3455 do_save = false; 3456 break; 3457 3458 case OPT_B: 3459 { 3460 size_t len = strlen (arg); 3461 3462 /* Catch the case where the user has forgotten to append a 3463 directory separator to the path. Note, they may be using 3464 -B to add an executable name prefix, eg "i386-elf-", in 3465 order to distinguish between multiple installations of 3466 GCC in the same directory. Hence we must check to see 3467 if appending a directory separator actually makes a 3468 valid directory name. */ 3469 if (!IS_DIR_SEPARATOR (arg[len - 1]) 3470 && is_directory (arg, false)) 3471 { 3472 char *tmp = XNEWVEC (char, len + 2); 3473 strcpy (tmp, arg); 3474 tmp[len] = DIR_SEPARATOR; 3475 tmp[++len] = 0; 3476 arg = tmp; 3477 } 3478 3479 add_prefix (&exec_prefixes, arg, NULL, 3480 PREFIX_PRIORITY_B_OPT, 0, 0); 3481 add_prefix (&startfile_prefixes, arg, NULL, 3482 PREFIX_PRIORITY_B_OPT, 0, 0); 3483 add_prefix (&include_prefixes, arg, NULL, 3484 PREFIX_PRIORITY_B_OPT, 0, 0); 3485 } 3486 validated = true; 3487 break; 3488 3489 case OPT_x: 3490 spec_lang = arg; 3491 if (!strcmp (spec_lang, "none")) 3492 /* Suppress the warning if -xnone comes after the last input 3493 file, because alternate command interfaces like g++ might 3494 find it useful to place -xnone after each input file. */ 3495 spec_lang = 0; 3496 else 3497 last_language_n_infiles = n_infiles; 3498 do_save = false; 3499 break; 3500 3501 case OPT_o: 3502 have_o = 1; 3503 #if defined(HAVE_TARGET_EXECUTABLE_SUFFIX) || defined(HAVE_TARGET_OBJECT_SUFFIX) 3504 arg = convert_filename (arg, ! have_c, 0); 3505 #endif 3506 /* Save the output name in case -save-temps=obj was used. */ 3507 save_temps_prefix = xstrdup (arg); 3508 /* On some systems, ld cannot handle "-o" without a space. So 3509 split the option from its argument. */ 3510 save_switch ("-o", 1, &arg, validated); 3511 return true; 3512 3513 case OPT_static_libgcc: 3514 case OPT_shared_libgcc: 3515 case OPT_static_libgfortran: 3516 case OPT_static_libstdc__: 3517 /* These are always valid, since gcc.c itself understands the 3518 first two, gfortranspec.c understands -static-libgfortran and 3519 g++spec.c understands -static-libstdc++ */ 3520 validated = true; 3521 break; 3522 3523 default: 3524 /* Various driver options need no special processing at this 3525 point, having been handled in a prescan above or being 3526 handled by specs. */ 3527 break; 3528 } 3529 3530 if (do_save) 3531 save_switch (decoded->canonical_option[0], 3532 decoded->canonical_option_num_elements - 1, 3533 &decoded->canonical_option[1], validated); 3534 return true; 3535 } 3536 3537 /* Put the driver's standard set of option handlers in *HANDLERS. */ 3538 3539 static void 3540 set_option_handlers (struct cl_option_handlers *handlers) 3541 { 3542 handlers->unknown_option_callback = driver_unknown_option_callback; 3543 handlers->wrong_lang_callback = driver_wrong_lang_callback; 3544 handlers->num_handlers = 3; 3545 handlers->handlers[0].handler = driver_handle_option; 3546 handlers->handlers[0].mask = CL_DRIVER; 3547 handlers->handlers[1].handler = common_handle_option; 3548 handlers->handlers[1].mask = CL_COMMON; 3549 handlers->handlers[2].handler = target_handle_option; 3550 handlers->handlers[2].mask = CL_TARGET; 3551 } 3552 3553 /* Create the vector `switches' and its contents. 3554 Store its length in `n_switches'. */ 3555 3556 static void 3557 process_command (unsigned int decoded_options_count, 3558 struct cl_decoded_option *decoded_options) 3559 { 3560 const char *temp; 3561 char *temp1; 3562 const char *tooldir_prefix; 3563 char *(*get_relative_prefix) (const char *, const char *, 3564 const char *) = NULL; 3565 struct cl_option_handlers handlers; 3566 unsigned int j; 3567 3568 gcc_exec_prefix = getenv ("GCC_EXEC_PREFIX"); 3569 3570 n_switches = 0; 3571 n_infiles = 0; 3572 added_libraries = 0; 3573 3574 /* Figure compiler version from version string. */ 3575 3576 compiler_version = temp1 = xstrdup (version_string); 3577 3578 for (; *temp1; ++temp1) 3579 { 3580 if (*temp1 == ' ') 3581 { 3582 *temp1 = '\0'; 3583 break; 3584 } 3585 } 3586 3587 /* Handle any -no-canonical-prefixes flag early, to assign the function 3588 that builds relative prefixes. This function creates default search 3589 paths that are needed later in normal option handling. */ 3590 3591 for (j = 1; j < decoded_options_count; j++) 3592 { 3593 if (decoded_options[j].opt_index == OPT_no_canonical_prefixes) 3594 { 3595 get_relative_prefix = make_relative_prefix_ignore_links; 3596 break; 3597 } 3598 } 3599 if (! get_relative_prefix) 3600 get_relative_prefix = make_relative_prefix; 3601 3602 /* Set up the default search paths. If there is no GCC_EXEC_PREFIX, 3603 see if we can create it from the pathname specified in 3604 decoded_options[0].arg. */ 3605 3606 gcc_libexec_prefix = standard_libexec_prefix; 3607 #ifndef VMS 3608 /* FIXME: make_relative_prefix doesn't yet work for VMS. */ 3609 if (!gcc_exec_prefix) 3610 { 3611 #if 0 /* Never use relative prefix (not bootstrapped) */ 3612 gcc_exec_prefix = get_relative_prefix (decoded_options[0].arg, 3613 standard_bindir_prefix, 3614 standard_exec_prefix); 3615 gcc_libexec_prefix = get_relative_prefix (decoded_options[0].arg, 3616 standard_bindir_prefix, 3617 standard_libexec_prefix); 3618 if (gcc_exec_prefix) 3619 xputenv (concat ("GCC_EXEC_PREFIX=", gcc_exec_prefix, NULL)); 3620 #endif 3621 } 3622 else 3623 { 3624 /* make_relative_prefix requires a program name, but 3625 GCC_EXEC_PREFIX is typically a directory name with a trailing 3626 / (which is ignored by make_relative_prefix), so append a 3627 program name. */ 3628 char *tmp_prefix = concat (gcc_exec_prefix, "gcc", NULL); 3629 gcc_libexec_prefix = get_relative_prefix (tmp_prefix, 3630 standard_exec_prefix, 3631 standard_libexec_prefix); 3632 3633 /* The path is unrelocated, so fallback to the original setting. */ 3634 if (!gcc_libexec_prefix) 3635 gcc_libexec_prefix = standard_libexec_prefix; 3636 3637 free (tmp_prefix); 3638 } 3639 #else 3640 #endif 3641 /* From this point onward, gcc_exec_prefix is non-null if the toolchain 3642 is relocated. The toolchain was either relocated using GCC_EXEC_PREFIX 3643 or an automatically created GCC_EXEC_PREFIX from 3644 decoded_options[0].arg. */ 3645 3646 /* Do language-specific adjustment/addition of flags. */ 3647 lang_specific_driver (&decoded_options, &decoded_options_count, 3648 &added_libraries); 3649 3650 if (gcc_exec_prefix) 3651 { 3652 int len = strlen (gcc_exec_prefix); 3653 3654 if (len > (int) sizeof ("/lib/gcc/") - 1 3655 && (IS_DIR_SEPARATOR (gcc_exec_prefix[len-1]))) 3656 { 3657 temp = gcc_exec_prefix + len - sizeof ("/lib/gcc/") + 1; 3658 if (IS_DIR_SEPARATOR (*temp) 3659 && filename_ncmp (temp + 1, "lib", 3) == 0 3660 && IS_DIR_SEPARATOR (temp[4]) 3661 && filename_ncmp (temp + 5, "gcc", 3) == 0) 3662 len -= sizeof ("/lib/gcc/") - 1; 3663 } 3664 3665 #if 0 /* Bad Paths */ 3666 set_std_prefix (gcc_exec_prefix, len); 3667 add_prefix (&exec_prefixes, gcc_libexec_prefix, "GCC", 3668 PREFIX_PRIORITY_LAST, 0, 0); 3669 add_prefix (&startfile_prefixes, gcc_exec_prefix, "GCC", 3670 PREFIX_PRIORITY_LAST, 0, 0); 3671 #endif 3672 } 3673 3674 /* COMPILER_PATH and LIBRARY_PATH have values 3675 that are lists of directory names with colons. */ 3676 3677 temp = getenv ("COMPILER_PATH"); 3678 if (temp) 3679 { 3680 const char *startp, *endp; 3681 char *nstore = (char *) alloca (strlen (temp) + 3); 3682 3683 startp = endp = temp; 3684 while (1) 3685 { 3686 if (*endp == PATH_SEPARATOR || *endp == 0) 3687 { 3688 strncpy (nstore, startp, endp - startp); 3689 if (endp == startp) 3690 strcpy (nstore, concat (".", dir_separator_str, NULL)); 3691 else if (!IS_DIR_SEPARATOR (endp[-1])) 3692 { 3693 nstore[endp - startp] = DIR_SEPARATOR; 3694 nstore[endp - startp + 1] = 0; 3695 } 3696 else 3697 nstore[endp - startp] = 0; 3698 add_prefix (&exec_prefixes, nstore, 0, 3699 PREFIX_PRIORITY_LAST, 0, 0); 3700 add_prefix (&include_prefixes, nstore, 0, 3701 PREFIX_PRIORITY_LAST, 0, 0); 3702 if (*endp == 0) 3703 break; 3704 endp = startp = endp + 1; 3705 } 3706 else 3707 endp++; 3708 } 3709 } 3710 3711 temp = getenv (LIBRARY_PATH_ENV); 3712 if (temp && *cross_compile == '0') 3713 { 3714 const char *startp, *endp; 3715 char *nstore = (char *) alloca (strlen (temp) + 3); 3716 3717 startp = endp = temp; 3718 while (1) 3719 { 3720 if (*endp == PATH_SEPARATOR || *endp == 0) 3721 { 3722 strncpy (nstore, startp, endp - startp); 3723 if (endp == startp) 3724 strcpy (nstore, concat (".", dir_separator_str, NULL)); 3725 else if (!IS_DIR_SEPARATOR (endp[-1])) 3726 { 3727 nstore[endp - startp] = DIR_SEPARATOR; 3728 nstore[endp - startp + 1] = 0; 3729 } 3730 else 3731 nstore[endp - startp] = 0; 3732 add_prefix (&startfile_prefixes, nstore, NULL, 3733 PREFIX_PRIORITY_LAST, 0, 1); 3734 if (*endp == 0) 3735 break; 3736 endp = startp = endp + 1; 3737 } 3738 else 3739 endp++; 3740 } 3741 } 3742 3743 /* Use LPATH like LIBRARY_PATH (for the CMU build program). */ 3744 temp = getenv ("LPATH"); 3745 if (temp && *cross_compile == '0') 3746 { 3747 const char *startp, *endp; 3748 char *nstore = (char *) alloca (strlen (temp) + 3); 3749 3750 startp = endp = temp; 3751 while (1) 3752 { 3753 if (*endp == PATH_SEPARATOR || *endp == 0) 3754 { 3755 strncpy (nstore, startp, endp - startp); 3756 if (endp == startp) 3757 strcpy (nstore, concat (".", dir_separator_str, NULL)); 3758 else if (!IS_DIR_SEPARATOR (endp[-1])) 3759 { 3760 nstore[endp - startp] = DIR_SEPARATOR; 3761 nstore[endp - startp + 1] = 0; 3762 } 3763 else 3764 nstore[endp - startp] = 0; 3765 add_prefix (&startfile_prefixes, nstore, NULL, 3766 PREFIX_PRIORITY_LAST, 0, 1); 3767 if (*endp == 0) 3768 break; 3769 endp = startp = endp + 1; 3770 } 3771 else 3772 endp++; 3773 } 3774 } 3775 3776 /* Process the options and store input files and switches in their 3777 vectors. */ 3778 3779 last_language_n_infiles = -1; 3780 3781 set_option_handlers (&handlers); 3782 3783 for (j = 1; j < decoded_options_count; j++) 3784 { 3785 switch (decoded_options[j].opt_index) 3786 { 3787 case OPT_S: 3788 case OPT_c: 3789 case OPT_E: 3790 have_c = 1; 3791 break; 3792 } 3793 if (have_c) 3794 break; 3795 } 3796 3797 for (j = 1; j < decoded_options_count; j++) 3798 { 3799 if (decoded_options[j].opt_index == OPT_SPECIAL_input_file) 3800 { 3801 const char *arg = decoded_options[j].arg; 3802 const char *p = strrchr (arg, '@'); 3803 char *fname; 3804 long offset; 3805 int consumed; 3806 #ifdef HAVE_TARGET_OBJECT_SUFFIX 3807 arg = convert_filename (arg, 0, access (arg, F_OK)); 3808 #endif 3809 /* For LTO static archive support we handle input file 3810 specifications that are composed of a filename and 3811 an offset like FNAME@OFFSET. */ 3812 if (p 3813 && p != arg 3814 && sscanf (p, "@%li%n", &offset, &consumed) >= 1 3815 && strlen (p) == (unsigned int)consumed) 3816 { 3817 fname = (char *)xmalloc (p - arg + 1); 3818 memcpy (fname, arg, p - arg); 3819 fname[p - arg] = '\0'; 3820 /* Only accept non-stdin and existing FNAME parts, otherwise 3821 try with the full name. */ 3822 if (strcmp (fname, "-") == 0 || access (fname, F_OK) < 0) 3823 { 3824 free (fname); 3825 fname = xstrdup (arg); 3826 } 3827 } 3828 else 3829 fname = xstrdup (arg); 3830 3831 if (strcmp (fname, "-") != 0 && access (fname, F_OK) < 0) 3832 perror_with_name (fname); 3833 else 3834 add_infile (arg, spec_lang); 3835 3836 free (fname); 3837 continue; 3838 } 3839 3840 read_cmdline_option (&global_options, &global_options_set, 3841 decoded_options + j, UNKNOWN_LOCATION, 3842 CL_DRIVER, &handlers, global_dc); 3843 } 3844 3845 /* If -save-temps=obj and -o name, create the prefix to use for %b. 3846 Otherwise just make -save-temps=obj the same as -save-temps=cwd. */ 3847 if (save_temps_flag == SAVE_TEMPS_OBJ && save_temps_prefix != NULL) 3848 { 3849 save_temps_length = strlen (save_temps_prefix); 3850 temp = strrchr (lbasename (save_temps_prefix), '.'); 3851 if (temp) 3852 { 3853 save_temps_length -= strlen (temp); 3854 save_temps_prefix[save_temps_length] = '\0'; 3855 } 3856 3857 } 3858 else if (save_temps_prefix != NULL) 3859 { 3860 free (save_temps_prefix); 3861 save_temps_prefix = NULL; 3862 } 3863 3864 if (save_temps_flag && use_pipes) 3865 { 3866 /* -save-temps overrides -pipe, so that temp files are produced */ 3867 if (save_temps_flag) 3868 warning (0, "-pipe ignored because -save-temps specified"); 3869 use_pipes = 0; 3870 } 3871 3872 if (!compare_debug) 3873 { 3874 const char *gcd = getenv ("GCC_COMPARE_DEBUG"); 3875 3876 if (gcd && gcd[0] == '-') 3877 { 3878 compare_debug = 2; 3879 compare_debug_opt = gcd; 3880 } 3881 else if (gcd && *gcd && strcmp (gcd, "0")) 3882 { 3883 compare_debug = 3; 3884 compare_debug_opt = "-gtoggle"; 3885 } 3886 } 3887 else if (compare_debug < 0) 3888 { 3889 compare_debug = 0; 3890 gcc_assert (!compare_debug_opt); 3891 } 3892 3893 /* Set up the search paths. We add directories that we expect to 3894 contain GNU Toolchain components before directories specified by 3895 the machine description so that we will find GNU components (like 3896 the GNU assembler) before those of the host system. */ 3897 3898 /* If we don't know where the toolchain has been installed, use the 3899 configured-in locations. */ 3900 if (!gcc_exec_prefix) 3901 { 3902 #ifndef OS2 3903 add_prefix (&exec_prefixes, standard_libexec_prefix, NULL, 3904 PREFIX_PRIORITY_LAST, 0, 0); 3905 #if 0 /* Bad paths */ 3906 add_prefix (&exec_prefixes, standard_libexec_prefix, "GCC", 3907 PREFIX_PRIORITY_LAST, 1, 0); 3908 add_prefix (&exec_prefixes, standard_libexec_prefix, "BINUTILS", 3909 PREFIX_PRIORITY_LAST, 2, 0); 3910 add_prefix (&exec_prefixes, standard_exec_prefix, "BINUTILS", 3911 PREFIX_PRIORITY_LAST, 2, 0); 3912 #endif 3913 #endif 3914 #if 0 /* Bad paths */ 3915 add_prefix (&startfile_prefixes, standard_exec_prefix, "BINUTILS", 3916 PREFIX_PRIORITY_LAST, 1, 0); 3917 #endif 3918 } 3919 3920 gcc_assert (!IS_ABSOLUTE_PATH (tooldir_base_prefix)); 3921 tooldir_prefix = concat (tooldir_base_prefix, spec_machine, 3922 dir_separator_str, NULL); 3923 3924 /* Look for tools relative to the location from which the driver is 3925 running, or, if that is not available, the configured prefix. */ 3926 tooldir_prefix 3927 = concat (gcc_exec_prefix ? gcc_exec_prefix : standard_exec_prefix, 3928 spec_machine, dir_separator_str, 3929 spec_version, dir_separator_str, tooldir_prefix, NULL); 3930 3931 #if 0 /* Bad paths */ 3932 add_prefix (&exec_prefixes, 3933 concat (tooldir_prefix, "bin", dir_separator_str, NULL), 3934 "BINUTILS", PREFIX_PRIORITY_LAST, 0, 0); 3935 add_prefix (&startfile_prefixes, 3936 concat (tooldir_prefix, "lib", dir_separator_str, NULL), 3937 "BINUTILS", PREFIX_PRIORITY_LAST, 0, 1); 3938 #endif 3939 3940 #if defined(TARGET_SYSTEM_ROOT_RELOCATABLE) && !defined(VMS) 3941 /* If the normal TARGET_SYSTEM_ROOT is inside of $exec_prefix, 3942 then consider it to relocate with the rest of the GCC installation 3943 if GCC_EXEC_PREFIX is set. 3944 ``make_relative_prefix'' is not compiled for VMS, so don't call it. */ 3945 if (target_system_root && !target_system_root_changed && gcc_exec_prefix) 3946 { 3947 char *tmp_prefix = get_relative_prefix (decoded_options[0].arg, 3948 standard_bindir_prefix, 3949 target_system_root); 3950 if (tmp_prefix && access_check (tmp_prefix, F_OK) == 0) 3951 { 3952 target_system_root = tmp_prefix; 3953 target_system_root_changed = 1; 3954 } 3955 } 3956 #endif 3957 3958 /* More prefixes are enabled in main, after we read the specs file 3959 and determine whether this is cross-compilation or not. */ 3960 3961 if (n_infiles == last_language_n_infiles && spec_lang != 0) 3962 warning (0, "%<-x %s%> after last input file has no effect", spec_lang); 3963 3964 if (compare_debug == 2 || compare_debug == 3) 3965 { 3966 alloc_switch (); 3967 switches[n_switches].part1 = concat ("fcompare-debug=", 3968 compare_debug_opt, 3969 NULL); 3970 switches[n_switches].args = 0; 3971 switches[n_switches].live_cond = 0; 3972 switches[n_switches].validated = 0; 3973 switches[n_switches].ordering = 0; 3974 n_switches++; 3975 compare_debug = 1; 3976 } 3977 3978 /* Ensure we only invoke each subprocess once. */ 3979 if (print_subprocess_help || print_help_list || print_version) 3980 { 3981 n_infiles = 0; 3982 3983 /* Create a dummy input file, so that we can pass 3984 the help option on to the various sub-processes. */ 3985 add_infile ("help-dummy", "c"); 3986 } 3987 3988 alloc_switch (); 3989 switches[n_switches].part1 = 0; 3990 alloc_infile (); 3991 infiles[n_infiles].name = 0; 3992 } 3993 3994 /* Store switches not filtered out by %<S in spec in COLLECT_GCC_OPTIONS 3995 and place that in the environment. */ 3996 3997 static void 3998 set_collect_gcc_options (void) 3999 { 4000 int i; 4001 int first_time; 4002 4003 /* Build COLLECT_GCC_OPTIONS to have all of the options specified to 4004 the compiler. */ 4005 obstack_grow (&collect_obstack, "COLLECT_GCC_OPTIONS=", 4006 sizeof ("COLLECT_GCC_OPTIONS=") - 1); 4007 4008 first_time = TRUE; 4009 for (i = 0; (int) i < n_switches; i++) 4010 { 4011 const char *const *args; 4012 const char *p, *q; 4013 if (!first_time) 4014 obstack_grow (&collect_obstack, " ", 1); 4015 4016 first_time = FALSE; 4017 4018 /* Ignore elided switches. */ 4019 if ((switches[i].live_cond 4020 & (SWITCH_IGNORE | SWITCH_KEEP_FOR_GCC)) 4021 == SWITCH_IGNORE) 4022 continue; 4023 4024 obstack_grow (&collect_obstack, "'-", 2); 4025 q = switches[i].part1; 4026 while ((p = strchr (q, '\''))) 4027 { 4028 obstack_grow (&collect_obstack, q, p - q); 4029 obstack_grow (&collect_obstack, "'\\''", 4); 4030 q = ++p; 4031 } 4032 obstack_grow (&collect_obstack, q, strlen (q)); 4033 obstack_grow (&collect_obstack, "'", 1); 4034 4035 for (args = switches[i].args; args && *args; args++) 4036 { 4037 obstack_grow (&collect_obstack, " '", 2); 4038 q = *args; 4039 while ((p = strchr (q, '\''))) 4040 { 4041 obstack_grow (&collect_obstack, q, p - q); 4042 obstack_grow (&collect_obstack, "'\\''", 4); 4043 q = ++p; 4044 } 4045 obstack_grow (&collect_obstack, q, strlen (q)); 4046 obstack_grow (&collect_obstack, "'", 1); 4047 } 4048 } 4049 obstack_grow (&collect_obstack, "\0", 1); 4050 xputenv (XOBFINISH (&collect_obstack, char *)); 4051 } 4052 4053 /* Process a spec string, accumulating and running commands. */ 4054 4055 /* These variables describe the input file name. 4056 input_file_number is the index on outfiles of this file, 4057 so that the output file name can be stored for later use by %o. 4058 input_basename is the start of the part of the input file 4059 sans all directory names, and basename_length is the number 4060 of characters starting there excluding the suffix .c or whatever. */ 4061 4062 static const char *gcc_input_filename; 4063 static int input_file_number; 4064 size_t input_filename_length; 4065 static int basename_length; 4066 static int suffixed_basename_length; 4067 static const char *input_basename; 4068 static const char *input_suffix; 4069 #ifndef HOST_LACKS_INODE_NUMBERS 4070 static struct stat input_stat; 4071 #endif 4072 static int input_stat_set; 4073 4074 /* The compiler used to process the current input file. */ 4075 static struct compiler *input_file_compiler; 4076 4077 /* These are variables used within do_spec and do_spec_1. */ 4078 4079 /* Nonzero if an arg has been started and not yet terminated 4080 (with space, tab or newline). */ 4081 static int arg_going; 4082 4083 /* Nonzero means %d or %g has been seen; the next arg to be terminated 4084 is a temporary file name. */ 4085 static int delete_this_arg; 4086 4087 /* Nonzero means %w has been seen; the next arg to be terminated 4088 is the output file name of this compilation. */ 4089 static int this_is_output_file; 4090 4091 /* Nonzero means %s has been seen; the next arg to be terminated 4092 is the name of a library file and we should try the standard 4093 search dirs for it. */ 4094 static int this_is_library_file; 4095 4096 /* Nonzero means %T has been seen; the next arg to be terminated 4097 is the name of a linker script and we should try all of the 4098 standard search dirs for it. If it is found insert a --script 4099 command line switch and then substitute the full path in place, 4100 otherwise generate an error message. */ 4101 static int this_is_linker_script; 4102 4103 /* Nonzero means that the input of this command is coming from a pipe. */ 4104 static int input_from_pipe; 4105 4106 /* Nonnull means substitute this for any suffix when outputting a switches 4107 arguments. */ 4108 static const char *suffix_subst; 4109 4110 /* If there is an argument being accumulated, terminate it and store it. */ 4111 4112 static void 4113 end_going_arg (void) 4114 { 4115 if (arg_going) 4116 { 4117 const char *string; 4118 4119 obstack_1grow (&obstack, 0); 4120 string = XOBFINISH (&obstack, const char *); 4121 if (this_is_library_file) 4122 string = find_file (string); 4123 if (this_is_linker_script) 4124 { 4125 char * full_script_path = find_a_file (&startfile_prefixes, string, R_OK, true); 4126 4127 if (full_script_path == NULL) 4128 { 4129 error ("unable to locate default linker script %qs in the library search paths", string); 4130 /* Script was not found on search path. */ 4131 return; 4132 } 4133 store_arg ("--script", false, false); 4134 string = full_script_path; 4135 } 4136 store_arg (string, delete_this_arg, this_is_output_file); 4137 if (this_is_output_file) 4138 outfiles[input_file_number] = string; 4139 arg_going = 0; 4140 } 4141 } 4142 4143 4144 /* Parse the WRAPPER string which is a comma separated list of the command line 4145 and insert them into the beginning of argbuf. */ 4146 4147 static void 4148 insert_wrapper (const char *wrapper) 4149 { 4150 int n = 0; 4151 int i; 4152 char *buf = xstrdup (wrapper); 4153 char *p = buf; 4154 unsigned int old_length = VEC_length (const_char_p, argbuf); 4155 4156 do 4157 { 4158 n++; 4159 while (*p == ',') 4160 p++; 4161 } 4162 while ((p = strchr (p, ',')) != NULL); 4163 4164 VEC_safe_grow (const_char_p, heap, argbuf, old_length + n); 4165 memmove (VEC_address (const_char_p, argbuf) + n, 4166 VEC_address (const_char_p, argbuf), 4167 old_length * sizeof (const_char_p)); 4168 4169 i = 0; 4170 p = buf; 4171 do 4172 { 4173 while (*p == ',') 4174 { 4175 *p = 0; 4176 p++; 4177 } 4178 VEC_replace (const_char_p, argbuf, i, p); 4179 i++; 4180 } 4181 while ((p = strchr (p, ',')) != NULL); 4182 gcc_assert (i == n); 4183 } 4184 4185 /* Process the spec SPEC and run the commands specified therein. 4186 Returns 0 if the spec is successfully processed; -1 if failed. */ 4187 4188 int 4189 do_spec (const char *spec) 4190 { 4191 int value; 4192 4193 value = do_spec_2 (spec); 4194 4195 /* Force out any unfinished command. 4196 If -pipe, this forces out the last command if it ended in `|'. */ 4197 if (value == 0) 4198 { 4199 if (VEC_length (const_char_p, argbuf) > 0 4200 && !strcmp (VEC_last (const_char_p, argbuf), "|")) 4201 VEC_pop (const_char_p, argbuf); 4202 4203 set_collect_gcc_options (); 4204 4205 if (VEC_length (const_char_p, argbuf) > 0) 4206 value = execute (); 4207 } 4208 4209 return value; 4210 } 4211 4212 static int 4213 do_spec_2 (const char *spec) 4214 { 4215 int result; 4216 4217 clear_args (); 4218 arg_going = 0; 4219 delete_this_arg = 0; 4220 this_is_output_file = 0; 4221 this_is_library_file = 0; 4222 this_is_linker_script = 0; 4223 input_from_pipe = 0; 4224 suffix_subst = NULL; 4225 4226 result = do_spec_1 (spec, 0, NULL); 4227 4228 end_going_arg (); 4229 4230 return result; 4231 } 4232 4233 4234 /* Process the given spec string and add any new options to the end 4235 of the switches/n_switches array. */ 4236 4237 static void 4238 do_option_spec (const char *name, const char *spec) 4239 { 4240 unsigned int i, value_count, value_len; 4241 const char *p, *q, *value; 4242 char *tmp_spec, *tmp_spec_p; 4243 4244 if (configure_default_options[0].name == NULL) 4245 return; 4246 4247 for (i = 0; i < ARRAY_SIZE (configure_default_options); i++) 4248 if (strcmp (configure_default_options[i].name, name) == 0) 4249 break; 4250 if (i == ARRAY_SIZE (configure_default_options)) 4251 return; 4252 4253 value = configure_default_options[i].value; 4254 value_len = strlen (value); 4255 4256 /* Compute the size of the final spec. */ 4257 value_count = 0; 4258 p = spec; 4259 while ((p = strstr (p, "%(VALUE)")) != NULL) 4260 { 4261 p ++; 4262 value_count ++; 4263 } 4264 4265 /* Replace each %(VALUE) by the specified value. */ 4266 tmp_spec = (char *) alloca (strlen (spec) + 1 4267 + value_count * (value_len - strlen ("%(VALUE)"))); 4268 tmp_spec_p = tmp_spec; 4269 q = spec; 4270 while ((p = strstr (q, "%(VALUE)")) != NULL) 4271 { 4272 memcpy (tmp_spec_p, q, p - q); 4273 tmp_spec_p = tmp_spec_p + (p - q); 4274 memcpy (tmp_spec_p, value, value_len); 4275 tmp_spec_p += value_len; 4276 q = p + strlen ("%(VALUE)"); 4277 } 4278 strcpy (tmp_spec_p, q); 4279 4280 do_self_spec (tmp_spec); 4281 } 4282 4283 /* Process the given spec string and add any new options to the end 4284 of the switches/n_switches array. */ 4285 4286 static void 4287 do_self_spec (const char *spec) 4288 { 4289 int i; 4290 4291 do_spec_2 (spec); 4292 do_spec_1 (" ", 0, NULL); 4293 4294 /* Mark %<S switches processed by do_self_spec to be ignored permanently. 4295 do_self_specs adds the replacements to switches array, so it shouldn't 4296 be processed afterwards. */ 4297 for (i = 0; i < n_switches; i++) 4298 if ((switches[i].live_cond & SWITCH_IGNORE)) 4299 switches[i].live_cond |= SWITCH_IGNORE_PERMANENTLY; 4300 4301 if (VEC_length (const_char_p, argbuf) > 0) 4302 { 4303 const char **argbuf_copy; 4304 struct cl_decoded_option *decoded_options; 4305 struct cl_option_handlers handlers; 4306 unsigned int decoded_options_count; 4307 unsigned int j; 4308 4309 /* Create a copy of argbuf with a dummy argv[0] entry for 4310 decode_cmdline_options_to_array. */ 4311 argbuf_copy = XNEWVEC (const char *, 4312 VEC_length (const_char_p, argbuf) + 1); 4313 argbuf_copy[0] = ""; 4314 memcpy (argbuf_copy + 1, VEC_address (const_char_p, argbuf), 4315 VEC_length (const_char_p, argbuf) * sizeof (const char *)); 4316 4317 decode_cmdline_options_to_array (VEC_length (const_char_p, argbuf) + 1, 4318 argbuf_copy, 4319 CL_DRIVER, &decoded_options, 4320 &decoded_options_count); 4321 4322 set_option_handlers (&handlers); 4323 4324 for (j = 1; j < decoded_options_count; j++) 4325 { 4326 switch (decoded_options[j].opt_index) 4327 { 4328 case OPT_SPECIAL_input_file: 4329 /* Specs should only generate options, not input 4330 files. */ 4331 if (strcmp (decoded_options[j].arg, "-") != 0) 4332 fatal_error ("switch %qs does not start with %<-%>", 4333 decoded_options[j].arg); 4334 else 4335 fatal_error ("spec-generated switch is just %<-%>"); 4336 break; 4337 4338 case OPT_fcompare_debug_second: 4339 case OPT_fcompare_debug: 4340 case OPT_fcompare_debug_: 4341 case OPT_o: 4342 /* Avoid duplicate processing of some options from 4343 compare-debug specs; just save them here. */ 4344 save_switch (decoded_options[j].canonical_option[0], 4345 (decoded_options[j].canonical_option_num_elements 4346 - 1), 4347 &decoded_options[j].canonical_option[1], false); 4348 break; 4349 4350 default: 4351 read_cmdline_option (&global_options, &global_options_set, 4352 decoded_options + j, UNKNOWN_LOCATION, 4353 CL_DRIVER, &handlers, global_dc); 4354 break; 4355 } 4356 } 4357 4358 alloc_switch (); 4359 switches[n_switches].part1 = 0; 4360 } 4361 } 4362 4363 /* Callback for processing %D and %I specs. */ 4364 4365 struct spec_path_info { 4366 const char *option; 4367 const char *append; 4368 size_t append_len; 4369 bool omit_relative; 4370 bool separate_options; 4371 }; 4372 4373 static void * 4374 spec_path (char *path, void *data) 4375 { 4376 struct spec_path_info *info = (struct spec_path_info *) data; 4377 size_t len = 0; 4378 char save = 0; 4379 4380 if (info->omit_relative && !IS_ABSOLUTE_PATH (path)) 4381 return NULL; 4382 4383 if (info->append_len != 0) 4384 { 4385 len = strlen (path); 4386 memcpy (path + len, info->append, info->append_len + 1); 4387 } 4388 4389 if (!is_directory (path, true)) 4390 return NULL; 4391 4392 do_spec_1 (info->option, 1, NULL); 4393 if (info->separate_options) 4394 do_spec_1 (" ", 0, NULL); 4395 4396 if (info->append_len == 0) 4397 { 4398 len = strlen (path); 4399 save = path[len - 1]; 4400 if (IS_DIR_SEPARATOR (path[len - 1])) 4401 path[len - 1] = '\0'; 4402 } 4403 4404 do_spec_1 (path, 1, NULL); 4405 do_spec_1 (" ", 0, NULL); 4406 4407 /* Must not damage the original path. */ 4408 if (info->append_len == 0) 4409 path[len - 1] = save; 4410 4411 return NULL; 4412 } 4413 4414 /* Create a temporary FILE with the contents of ARGV. Add @FILE to the 4415 argument list. */ 4416 4417 static void 4418 create_at_file (char **argv) 4419 { 4420 char *temp_file = make_temp_file (""); 4421 char *at_argument = concat ("@", temp_file, NULL); 4422 FILE *f = fopen (temp_file, "w"); 4423 int status; 4424 4425 if (f == NULL) 4426 fatal_error ("could not open temporary response file %s", 4427 temp_file); 4428 4429 status = writeargv (argv, f); 4430 4431 if (status) 4432 fatal_error ("could not write to temporary response file %s", 4433 temp_file); 4434 4435 status = fclose (f); 4436 4437 if (EOF == status) 4438 fatal_error ("could not close temporary response file %s", 4439 temp_file); 4440 4441 store_arg (at_argument, 0, 0); 4442 4443 record_temp_file (temp_file, !save_temps_flag, !save_temps_flag); 4444 } 4445 4446 /* True if we should compile INFILE. */ 4447 4448 static bool 4449 compile_input_file_p (struct infile *infile) 4450 { 4451 if ((!infile->language) || (infile->language[0] != '*')) 4452 if (infile->incompiler == input_file_compiler) 4453 return true; 4454 return false; 4455 } 4456 4457 /* Process each member of VEC as a spec. */ 4458 4459 static void 4460 do_specs_vec (VEC(char_p,heap) *vec) 4461 { 4462 unsigned ix; 4463 char *opt; 4464 4465 FOR_EACH_VEC_ELT (char_p, vec, ix, opt) 4466 { 4467 do_spec_1 (opt, 1, NULL); 4468 /* Make each accumulated option a separate argument. */ 4469 do_spec_1 (" ", 0, NULL); 4470 } 4471 } 4472 4473 /* Process the sub-spec SPEC as a portion of a larger spec. 4474 This is like processing a whole spec except that we do 4475 not initialize at the beginning and we do not supply a 4476 newline by default at the end. 4477 INSWITCH nonzero means don't process %-sequences in SPEC; 4478 in this case, % is treated as an ordinary character. 4479 This is used while substituting switches. 4480 INSWITCH nonzero also causes SPC not to terminate an argument. 4481 4482 Value is zero unless a line was finished 4483 and the command on that line reported an error. */ 4484 4485 static int 4486 do_spec_1 (const char *spec, int inswitch, const char *soft_matched_part) 4487 { 4488 const char *p = spec; 4489 int c; 4490 int i; 4491 int value; 4492 4493 /* If it's an empty string argument to a switch, keep it as is. */ 4494 if (inswitch && !*p) 4495 arg_going = 1; 4496 4497 while ((c = *p++)) 4498 /* If substituting a switch, treat all chars like letters. 4499 Otherwise, NL, SPC, TAB and % are special. */ 4500 switch (inswitch ? 'a' : c) 4501 { 4502 case '\n': 4503 end_going_arg (); 4504 4505 if (VEC_length (const_char_p, argbuf) > 0 4506 && !strcmp (VEC_last (const_char_p, argbuf), "|")) 4507 { 4508 /* A `|' before the newline means use a pipe here, 4509 but only if -pipe was specified. 4510 Otherwise, execute now and don't pass the `|' as an arg. */ 4511 if (use_pipes) 4512 { 4513 input_from_pipe = 1; 4514 break; 4515 } 4516 else 4517 VEC_pop (const_char_p, argbuf); 4518 } 4519 4520 set_collect_gcc_options (); 4521 4522 if (VEC_length (const_char_p, argbuf) > 0) 4523 { 4524 value = execute (); 4525 if (value) 4526 return value; 4527 } 4528 /* Reinitialize for a new command, and for a new argument. */ 4529 clear_args (); 4530 arg_going = 0; 4531 delete_this_arg = 0; 4532 this_is_output_file = 0; 4533 this_is_library_file = 0; 4534 this_is_linker_script = 0; 4535 input_from_pipe = 0; 4536 break; 4537 4538 case '|': 4539 end_going_arg (); 4540 4541 /* Use pipe */ 4542 obstack_1grow (&obstack, c); 4543 arg_going = 1; 4544 break; 4545 4546 case '\t': 4547 case ' ': 4548 end_going_arg (); 4549 4550 /* Reinitialize for a new argument. */ 4551 delete_this_arg = 0; 4552 this_is_output_file = 0; 4553 this_is_library_file = 0; 4554 this_is_linker_script = 0; 4555 break; 4556 4557 case '%': 4558 switch (c = *p++) 4559 { 4560 case 0: 4561 fatal_error ("spec %qs invalid", spec); 4562 4563 case 'b': 4564 if (save_temps_length) 4565 obstack_grow (&obstack, save_temps_prefix, save_temps_length); 4566 else 4567 obstack_grow (&obstack, input_basename, basename_length); 4568 if (compare_debug < 0) 4569 obstack_grow (&obstack, ".gk", 3); 4570 arg_going = 1; 4571 break; 4572 4573 case 'B': 4574 if (save_temps_length) 4575 obstack_grow (&obstack, save_temps_prefix, save_temps_length); 4576 else 4577 obstack_grow (&obstack, input_basename, suffixed_basename_length); 4578 if (compare_debug < 0) 4579 obstack_grow (&obstack, ".gk", 3); 4580 arg_going = 1; 4581 break; 4582 4583 case 'd': 4584 delete_this_arg = 2; 4585 break; 4586 4587 /* Dump out the directories specified with LIBRARY_PATH, 4588 followed by the absolute directories 4589 that we search for startfiles. */ 4590 case 'D': 4591 { 4592 struct spec_path_info info; 4593 4594 info.option = "-L"; 4595 info.append_len = 0; 4596 #ifdef RELATIVE_PREFIX_NOT_LINKDIR 4597 /* Used on systems which record the specified -L dirs 4598 and use them to search for dynamic linking. 4599 Relative directories always come from -B, 4600 and it is better not to use them for searching 4601 at run time. In particular, stage1 loses. */ 4602 info.omit_relative = true; 4603 #else 4604 info.omit_relative = false; 4605 #endif 4606 info.separate_options = false; 4607 4608 for_each_path (&startfile_prefixes, true, 0, spec_path, &info); 4609 } 4610 break; 4611 4612 case 'e': 4613 /* %efoo means report an error with `foo' as error message 4614 and don't execute any more commands for this file. */ 4615 { 4616 const char *q = p; 4617 char *buf; 4618 while (*p != 0 && *p != '\n') 4619 p++; 4620 buf = (char *) alloca (p - q + 1); 4621 strncpy (buf, q, p - q); 4622 buf[p - q] = 0; 4623 error ("%s", _(buf)); 4624 return -1; 4625 } 4626 break; 4627 case 'n': 4628 /* %nfoo means report a notice with `foo' on stderr. */ 4629 { 4630 const char *q = p; 4631 char *buf; 4632 while (*p != 0 && *p != '\n') 4633 p++; 4634 buf = (char *) alloca (p - q + 1); 4635 strncpy (buf, q, p - q); 4636 buf[p - q] = 0; 4637 inform (0, "%s", _(buf)); 4638 if (*p) 4639 p++; 4640 } 4641 break; 4642 4643 case 'j': 4644 { 4645 struct stat st; 4646 4647 /* If save_temps_flag is off, and the HOST_BIT_BUCKET is 4648 defined, and it is not a directory, and it is 4649 writable, use it. Otherwise, treat this like any 4650 other temporary file. */ 4651 4652 if ((!save_temps_flag) 4653 && (stat (HOST_BIT_BUCKET, &st) == 0) && (!S_ISDIR (st.st_mode)) 4654 && (access (HOST_BIT_BUCKET, W_OK) == 0)) 4655 { 4656 obstack_grow (&obstack, HOST_BIT_BUCKET, 4657 strlen (HOST_BIT_BUCKET)); 4658 delete_this_arg = 0; 4659 arg_going = 1; 4660 break; 4661 } 4662 } 4663 goto create_temp_file; 4664 case '|': 4665 if (use_pipes) 4666 { 4667 obstack_1grow (&obstack, '-'); 4668 delete_this_arg = 0; 4669 arg_going = 1; 4670 4671 /* consume suffix */ 4672 while (*p == '.' || ISALNUM ((unsigned char) *p)) 4673 p++; 4674 if (p[0] == '%' && p[1] == 'O') 4675 p += 2; 4676 4677 break; 4678 } 4679 goto create_temp_file; 4680 case 'm': 4681 if (use_pipes) 4682 { 4683 /* consume suffix */ 4684 while (*p == '.' || ISALNUM ((unsigned char) *p)) 4685 p++; 4686 if (p[0] == '%' && p[1] == 'O') 4687 p += 2; 4688 4689 break; 4690 } 4691 goto create_temp_file; 4692 case 'g': 4693 case 'u': 4694 case 'U': 4695 create_temp_file: 4696 { 4697 struct temp_name *t; 4698 int suffix_length; 4699 const char *suffix = p; 4700 char *saved_suffix = NULL; 4701 4702 while (*p == '.' || ISALNUM ((unsigned char) *p)) 4703 p++; 4704 suffix_length = p - suffix; 4705 if (p[0] == '%' && p[1] == 'O') 4706 { 4707 p += 2; 4708 /* We don't support extra suffix characters after %O. */ 4709 if (*p == '.' || ISALNUM ((unsigned char) *p)) 4710 fatal_error ("spec %qs has invalid %<%%0%c%>", spec, *p); 4711 if (suffix_length == 0) 4712 suffix = TARGET_OBJECT_SUFFIX; 4713 else 4714 { 4715 saved_suffix 4716 = XNEWVEC (char, suffix_length 4717 + strlen (TARGET_OBJECT_SUFFIX)); 4718 strncpy (saved_suffix, suffix, suffix_length); 4719 strcpy (saved_suffix + suffix_length, 4720 TARGET_OBJECT_SUFFIX); 4721 } 4722 suffix_length += strlen (TARGET_OBJECT_SUFFIX); 4723 } 4724 4725 if (compare_debug < 0) 4726 { 4727 suffix = concat (".gk", suffix, NULL); 4728 suffix_length += 3; 4729 } 4730 4731 /* If -save-temps=obj and -o were specified, use that for the 4732 temp file. */ 4733 if (save_temps_length) 4734 { 4735 char *tmp; 4736 temp_filename_length 4737 = save_temps_length + suffix_length + 1; 4738 tmp = (char *) alloca (temp_filename_length); 4739 memcpy (tmp, save_temps_prefix, save_temps_length); 4740 memcpy (tmp + save_temps_length, suffix, suffix_length); 4741 tmp[save_temps_length + suffix_length] = '\0'; 4742 temp_filename = save_string (tmp, 4743 temp_filename_length + 1); 4744 obstack_grow (&obstack, temp_filename, 4745 temp_filename_length); 4746 arg_going = 1; 4747 delete_this_arg = 0; 4748 break; 4749 } 4750 4751 /* If the gcc_input_filename has the same suffix specified 4752 for the %g, %u, or %U, and -save-temps is specified, 4753 we could end up using that file as an intermediate 4754 thus clobbering the user's source file (.e.g., 4755 gcc -save-temps foo.s would clobber foo.s with the 4756 output of cpp0). So check for this condition and 4757 generate a temp file as the intermediate. */ 4758 4759 if (save_temps_flag) 4760 { 4761 char *tmp; 4762 temp_filename_length = basename_length + suffix_length + 1; 4763 tmp = (char *) alloca (temp_filename_length); 4764 memcpy (tmp, input_basename, basename_length); 4765 memcpy (tmp + basename_length, suffix, suffix_length); 4766 tmp[basename_length + suffix_length] = '\0'; 4767 temp_filename = tmp; 4768 4769 if (filename_cmp (temp_filename, gcc_input_filename) != 0) 4770 { 4771 #ifndef HOST_LACKS_INODE_NUMBERS 4772 struct stat st_temp; 4773 4774 /* Note, set_input() resets input_stat_set to 0. */ 4775 if (input_stat_set == 0) 4776 { 4777 input_stat_set = stat (gcc_input_filename, 4778 &input_stat); 4779 if (input_stat_set >= 0) 4780 input_stat_set = 1; 4781 } 4782 4783 /* If we have the stat for the gcc_input_filename 4784 and we can do the stat for the temp_filename 4785 then the they could still refer to the same 4786 file if st_dev/st_ino's are the same. */ 4787 if (input_stat_set != 1 4788 || stat (temp_filename, &st_temp) < 0 4789 || input_stat.st_dev != st_temp.st_dev 4790 || input_stat.st_ino != st_temp.st_ino) 4791 #else 4792 /* Just compare canonical pathnames. */ 4793 char* input_realname = lrealpath (gcc_input_filename); 4794 char* temp_realname = lrealpath (temp_filename); 4795 bool files_differ = filename_cmp (input_realname, temp_realname); 4796 free (input_realname); 4797 free (temp_realname); 4798 if (files_differ) 4799 #endif 4800 { 4801 temp_filename = save_string (temp_filename, 4802 temp_filename_length + 1); 4803 obstack_grow (&obstack, temp_filename, 4804 temp_filename_length); 4805 arg_going = 1; 4806 delete_this_arg = 0; 4807 break; 4808 } 4809 } 4810 } 4811 4812 /* See if we already have an association of %g/%u/%U and 4813 suffix. */ 4814 for (t = temp_names; t; t = t->next) 4815 if (t->length == suffix_length 4816 && strncmp (t->suffix, suffix, suffix_length) == 0 4817 && t->unique == (c == 'u' || c == 'U' || c == 'j')) 4818 break; 4819 4820 /* Make a new association if needed. %u and %j 4821 require one. */ 4822 if (t == 0 || c == 'u' || c == 'j') 4823 { 4824 if (t == 0) 4825 { 4826 t = XNEW (struct temp_name); 4827 t->next = temp_names; 4828 temp_names = t; 4829 } 4830 t->length = suffix_length; 4831 if (saved_suffix) 4832 { 4833 t->suffix = saved_suffix; 4834 saved_suffix = NULL; 4835 } 4836 else 4837 t->suffix = save_string (suffix, suffix_length); 4838 t->unique = (c == 'u' || c == 'U' || c == 'j'); 4839 temp_filename = make_temp_file (t->suffix); 4840 temp_filename_length = strlen (temp_filename); 4841 t->filename = temp_filename; 4842 t->filename_length = temp_filename_length; 4843 } 4844 4845 free (saved_suffix); 4846 4847 obstack_grow (&obstack, t->filename, t->filename_length); 4848 delete_this_arg = 1; 4849 } 4850 arg_going = 1; 4851 break; 4852 4853 case 'i': 4854 if (combine_inputs) 4855 { 4856 if (at_file_supplied) 4857 { 4858 /* We are going to expand `%i' to `@FILE', where FILE 4859 is a newly-created temporary filename. The filenames 4860 that would usually be expanded in place of %o will be 4861 written to the temporary file. */ 4862 char **argv; 4863 int n_files = 0; 4864 int j; 4865 4866 for (i = 0; i < n_infiles; i++) 4867 if (compile_input_file_p (&infiles[i])) 4868 n_files++; 4869 4870 argv = (char **) alloca (sizeof (char *) * (n_files + 1)); 4871 4872 /* Copy the strings over. */ 4873 for (i = 0, j = 0; i < n_infiles; i++) 4874 if (compile_input_file_p (&infiles[i])) 4875 { 4876 argv[j] = CONST_CAST (char *, infiles[i].name); 4877 infiles[i].compiled = true; 4878 j++; 4879 } 4880 argv[j] = NULL; 4881 4882 create_at_file (argv); 4883 } 4884 else 4885 for (i = 0; (int) i < n_infiles; i++) 4886 if (compile_input_file_p (&infiles[i])) 4887 { 4888 store_arg (infiles[i].name, 0, 0); 4889 infiles[i].compiled = true; 4890 } 4891 } 4892 else 4893 { 4894 obstack_grow (&obstack, gcc_input_filename, 4895 input_filename_length); 4896 arg_going = 1; 4897 } 4898 break; 4899 4900 case 'I': 4901 { 4902 struct spec_path_info info; 4903 4904 if (multilib_dir) 4905 { 4906 do_spec_1 ("-imultilib", 1, NULL); 4907 /* Make this a separate argument. */ 4908 do_spec_1 (" ", 0, NULL); 4909 do_spec_1 (multilib_dir, 1, NULL); 4910 do_spec_1 (" ", 0, NULL); 4911 } 4912 4913 if (gcc_exec_prefix) 4914 { 4915 do_spec_1 ("-iprefix", 1, NULL); 4916 /* Make this a separate argument. */ 4917 do_spec_1 (" ", 0, NULL); 4918 do_spec_1 (gcc_exec_prefix, 1, NULL); 4919 do_spec_1 (" ", 0, NULL); 4920 } 4921 4922 if (target_system_root_changed || 4923 (target_system_root && target_sysroot_hdrs_suffix)) 4924 { 4925 do_spec_1 ("-isysroot", 1, NULL); 4926 /* Make this a separate argument. */ 4927 do_spec_1 (" ", 0, NULL); 4928 do_spec_1 (target_system_root, 1, NULL); 4929 if (target_sysroot_hdrs_suffix) 4930 do_spec_1 (target_sysroot_hdrs_suffix, 1, NULL); 4931 do_spec_1 (" ", 0, NULL); 4932 } 4933 4934 info.option = "-isystem"; 4935 info.append = "include"; 4936 info.append_len = strlen (info.append); 4937 info.omit_relative = false; 4938 info.separate_options = true; 4939 4940 for_each_path (&include_prefixes, false, info.append_len, 4941 spec_path, &info); 4942 4943 info.append = "include-fixed"; 4944 if (*sysroot_hdrs_suffix_spec) 4945 info.append = concat (info.append, dir_separator_str, 4946 multilib_dir, NULL); 4947 info.append_len = strlen (info.append); 4948 for_each_path (&include_prefixes, false, info.append_len, 4949 spec_path, &info); 4950 } 4951 break; 4952 4953 case 'o': 4954 { 4955 int max = n_infiles; 4956 max += lang_specific_extra_outfiles; 4957 4958 if (HAVE_GNU_LD && at_file_supplied) 4959 { 4960 /* We are going to expand `%o' to `@FILE', where FILE 4961 is a newly-created temporary filename. The filenames 4962 that would usually be expanded in place of %o will be 4963 written to the temporary file. */ 4964 4965 char **argv; 4966 int n_files, j; 4967 4968 /* Convert OUTFILES into a form suitable for writeargv. */ 4969 4970 /* Determine how many are non-NULL. */ 4971 for (n_files = 0, i = 0; i < max; i++) 4972 n_files += outfiles[i] != NULL; 4973 4974 argv = (char **) alloca (sizeof (char *) * (n_files + 1)); 4975 4976 /* Copy the strings over. */ 4977 for (i = 0, j = 0; i < max; i++) 4978 if (outfiles[i]) 4979 { 4980 argv[j] = CONST_CAST (char *, outfiles[i]); 4981 j++; 4982 } 4983 argv[j] = NULL; 4984 4985 create_at_file (argv); 4986 } 4987 else 4988 for (i = 0; i < max; i++) 4989 if (outfiles[i]) 4990 store_arg (outfiles[i], 0, 0); 4991 break; 4992 } 4993 4994 case 'O': 4995 obstack_grow (&obstack, TARGET_OBJECT_SUFFIX, strlen (TARGET_OBJECT_SUFFIX)); 4996 arg_going = 1; 4997 break; 4998 4999 case 's': 5000 this_is_library_file = 1; 5001 break; 5002 5003 case 'T': 5004 this_is_linker_script = 1; 5005 break; 5006 5007 case 'V': 5008 outfiles[input_file_number] = NULL; 5009 break; 5010 5011 case 'w': 5012 this_is_output_file = 1; 5013 break; 5014 5015 case 'W': 5016 { 5017 unsigned int cur_index = VEC_length (const_char_p, argbuf); 5018 /* Handle the {...} following the %W. */ 5019 if (*p != '{') 5020 fatal_error ("spec %qs has invalid %<%%W%c%>", spec, *p); 5021 p = handle_braces (p + 1); 5022 if (p == 0) 5023 return -1; 5024 end_going_arg (); 5025 /* If any args were output, mark the last one for deletion 5026 on failure. */ 5027 if (VEC_length (const_char_p, argbuf) != cur_index) 5028 record_temp_file (VEC_last (const_char_p, argbuf), 0, 1); 5029 break; 5030 } 5031 5032 /* %x{OPTION} records OPTION for %X to output. */ 5033 case 'x': 5034 { 5035 const char *p1 = p; 5036 char *string; 5037 char *opt; 5038 unsigned ix; 5039 5040 /* Skip past the option value and make a copy. */ 5041 if (*p != '{') 5042 fatal_error ("spec %qs has invalid %<%%x%c%>", spec, *p); 5043 while (*p++ != '}') 5044 ; 5045 string = save_string (p1 + 1, p - p1 - 2); 5046 5047 /* See if we already recorded this option. */ 5048 FOR_EACH_VEC_ELT (char_p, linker_options, ix, opt) 5049 if (! strcmp (string, opt)) 5050 { 5051 free (string); 5052 return 0; 5053 } 5054 5055 /* This option is new; add it. */ 5056 add_linker_option (string, strlen (string)); 5057 } 5058 break; 5059 5060 /* Dump out the options accumulated previously using %x. */ 5061 case 'X': 5062 do_specs_vec (linker_options); 5063 break; 5064 5065 /* Dump out the options accumulated previously using -Wa,. */ 5066 case 'Y': 5067 do_specs_vec (assembler_options); 5068 break; 5069 5070 /* Dump out the options accumulated previously using -Wp,. */ 5071 case 'Z': 5072 do_specs_vec (preprocessor_options); 5073 break; 5074 5075 /* Here are digits and numbers that just process 5076 a certain constant string as a spec. */ 5077 5078 case '1': 5079 value = do_spec_1 (cc1_spec, 0, NULL); 5080 if (value != 0) 5081 return value; 5082 break; 5083 5084 case '2': 5085 value = do_spec_1 (cc1plus_spec, 0, NULL); 5086 if (value != 0) 5087 return value; 5088 break; 5089 5090 case 'a': 5091 value = do_spec_1 (asm_spec, 0, NULL); 5092 if (value != 0) 5093 return value; 5094 break; 5095 5096 case 'A': 5097 value = do_spec_1 (asm_final_spec, 0, NULL); 5098 if (value != 0) 5099 return value; 5100 break; 5101 5102 case 'C': 5103 { 5104 const char *const spec 5105 = (input_file_compiler->cpp_spec 5106 ? input_file_compiler->cpp_spec 5107 : cpp_spec); 5108 value = do_spec_1 (spec, 0, NULL); 5109 if (value != 0) 5110 return value; 5111 } 5112 break; 5113 5114 case 'E': 5115 value = do_spec_1 (endfile_spec, 0, NULL); 5116 if (value != 0) 5117 return value; 5118 break; 5119 5120 case 'l': 5121 value = do_spec_1 (link_spec, 0, NULL); 5122 if (value != 0) 5123 return value; 5124 break; 5125 5126 case 'L': 5127 value = do_spec_1 (lib_spec, 0, NULL); 5128 if (value != 0) 5129 return value; 5130 break; 5131 5132 case 'G': 5133 value = do_spec_1 (libgcc_spec, 0, NULL); 5134 if (value != 0) 5135 return value; 5136 break; 5137 5138 case 'R': 5139 /* We assume there is a directory 5140 separator at the end of this string. */ 5141 if (target_system_root) 5142 { 5143 obstack_grow (&obstack, target_system_root, 5144 strlen (target_system_root)); 5145 if (target_sysroot_suffix) 5146 obstack_grow (&obstack, target_sysroot_suffix, 5147 strlen (target_sysroot_suffix)); 5148 } 5149 break; 5150 5151 case 'S': 5152 value = do_spec_1 (startfile_spec, 0, NULL); 5153 if (value != 0) 5154 return value; 5155 break; 5156 5157 /* Here we define characters other than letters and digits. */ 5158 5159 case '{': 5160 p = handle_braces (p); 5161 if (p == 0) 5162 return -1; 5163 break; 5164 5165 case ':': 5166 p = handle_spec_function (p); 5167 if (p == 0) 5168 return -1; 5169 break; 5170 5171 case '%': 5172 obstack_1grow (&obstack, '%'); 5173 break; 5174 5175 case '.': 5176 { 5177 unsigned len = 0; 5178 5179 while (p[len] && p[len] != ' ' && p[len] != '%') 5180 len++; 5181 suffix_subst = save_string (p - 1, len + 1); 5182 p += len; 5183 } 5184 break; 5185 5186 /* Henceforth ignore the option(s) matching the pattern 5187 after the %<. */ 5188 case '<': 5189 case '>': 5190 { 5191 unsigned len = 0; 5192 int have_wildcard = 0; 5193 int i; 5194 int switch_option; 5195 5196 if (c == '>') 5197 switch_option = SWITCH_IGNORE | SWITCH_KEEP_FOR_GCC; 5198 else 5199 switch_option = SWITCH_IGNORE; 5200 5201 while (p[len] && p[len] != ' ' && p[len] != '\t') 5202 len++; 5203 5204 if (p[len-1] == '*') 5205 have_wildcard = 1; 5206 5207 for (i = 0; i < n_switches; i++) 5208 if (!strncmp (switches[i].part1, p, len - have_wildcard) 5209 && (have_wildcard || switches[i].part1[len] == '\0')) 5210 { 5211 switches[i].live_cond |= switch_option; 5212 switches[i].validated = 1; 5213 } 5214 5215 p += len; 5216 } 5217 break; 5218 5219 case '*': 5220 if (soft_matched_part) 5221 { 5222 if (soft_matched_part[0]) 5223 do_spec_1 (soft_matched_part, 1, NULL); 5224 do_spec_1 (" ", 0, NULL); 5225 } 5226 else 5227 /* Catch the case where a spec string contains something like 5228 '%{foo:%*}'. i.e. there is no * in the pattern on the left 5229 hand side of the :. */ 5230 error ("spec failure: %<%%*%> has not been initialized by pattern match"); 5231 break; 5232 5233 /* Process a string found as the value of a spec given by name. 5234 This feature allows individual machine descriptions 5235 to add and use their own specs. */ 5236 case '(': 5237 { 5238 const char *name = p; 5239 struct spec_list *sl; 5240 int len; 5241 5242 /* The string after the S/P is the name of a spec that is to be 5243 processed. */ 5244 while (*p && *p != ')') 5245 p++; 5246 5247 /* See if it's in the list. */ 5248 for (len = p - name, sl = specs; sl; sl = sl->next) 5249 if (sl->name_len == len && !strncmp (sl->name, name, len)) 5250 { 5251 name = *(sl->ptr_spec); 5252 #ifdef DEBUG_SPECS 5253 fnotice (stderr, "Processing spec (%s), which is '%s'\n", 5254 sl->name, name); 5255 #endif 5256 break; 5257 } 5258 5259 if (sl) 5260 { 5261 value = do_spec_1 (name, 0, NULL); 5262 if (value != 0) 5263 return value; 5264 } 5265 5266 /* Discard the closing paren. */ 5267 if (*p) 5268 p++; 5269 } 5270 break; 5271 5272 default: 5273 error ("spec failure: unrecognized spec option %qc", c); 5274 break; 5275 } 5276 break; 5277 5278 case '\\': 5279 /* Backslash: treat next character as ordinary. */ 5280 c = *p++; 5281 5282 /* Fall through. */ 5283 default: 5284 /* Ordinary character: put it into the current argument. */ 5285 obstack_1grow (&obstack, c); 5286 arg_going = 1; 5287 } 5288 5289 /* End of string. If we are processing a spec function, we need to 5290 end any pending argument. */ 5291 if (processing_spec_function) 5292 end_going_arg (); 5293 5294 return 0; 5295 } 5296 5297 /* Look up a spec function. */ 5298 5299 static const struct spec_function * 5300 lookup_spec_function (const char *name) 5301 { 5302 const struct spec_function *sf; 5303 5304 for (sf = static_spec_functions; sf->name != NULL; sf++) 5305 if (strcmp (sf->name, name) == 0) 5306 return sf; 5307 5308 return NULL; 5309 } 5310 5311 /* Evaluate a spec function. */ 5312 5313 static const char * 5314 eval_spec_function (const char *func, const char *args) 5315 { 5316 const struct spec_function *sf; 5317 const char *funcval; 5318 5319 /* Saved spec processing context. */ 5320 VEC(const_char_p,heap) *save_argbuf; 5321 5322 int save_arg_going; 5323 int save_delete_this_arg; 5324 int save_this_is_output_file; 5325 int save_this_is_library_file; 5326 int save_input_from_pipe; 5327 int save_this_is_linker_script; 5328 const char *save_suffix_subst; 5329 5330 5331 sf = lookup_spec_function (func); 5332 if (sf == NULL) 5333 fatal_error ("unknown spec function %qs", func); 5334 5335 /* Push the spec processing context. */ 5336 save_argbuf = argbuf; 5337 5338 save_arg_going = arg_going; 5339 save_delete_this_arg = delete_this_arg; 5340 save_this_is_output_file = this_is_output_file; 5341 save_this_is_library_file = this_is_library_file; 5342 save_this_is_linker_script = this_is_linker_script; 5343 save_input_from_pipe = input_from_pipe; 5344 save_suffix_subst = suffix_subst; 5345 5346 /* Create a new spec processing context, and build the function 5347 arguments. */ 5348 5349 alloc_args (); 5350 if (do_spec_2 (args) < 0) 5351 fatal_error ("error in args to spec function %qs", func); 5352 5353 /* argbuf_index is an index for the next argument to be inserted, and 5354 so contains the count of the args already inserted. */ 5355 5356 funcval = (*sf->func) (VEC_length (const_char_p, argbuf), 5357 VEC_address (const_char_p, argbuf)); 5358 5359 /* Pop the spec processing context. */ 5360 VEC_free (const_char_p, heap, argbuf); 5361 argbuf = save_argbuf; 5362 5363 arg_going = save_arg_going; 5364 delete_this_arg = save_delete_this_arg; 5365 this_is_output_file = save_this_is_output_file; 5366 this_is_library_file = save_this_is_library_file; 5367 this_is_linker_script = save_this_is_linker_script; 5368 input_from_pipe = save_input_from_pipe; 5369 suffix_subst = save_suffix_subst; 5370 5371 return funcval; 5372 } 5373 5374 /* Handle a spec function call of the form: 5375 5376 %:function(args) 5377 5378 ARGS is processed as a spec in a separate context and split into an 5379 argument vector in the normal fashion. The function returns a string 5380 containing a spec which we then process in the caller's context, or 5381 NULL if no processing is required. */ 5382 5383 static const char * 5384 handle_spec_function (const char *p) 5385 { 5386 char *func, *args; 5387 const char *endp, *funcval; 5388 int count; 5389 5390 processing_spec_function++; 5391 5392 /* Get the function name. */ 5393 for (endp = p; *endp != '\0'; endp++) 5394 { 5395 if (*endp == '(') /* ) */ 5396 break; 5397 /* Only allow [A-Za-z0-9], -, and _ in function names. */ 5398 if (!ISALNUM (*endp) && !(*endp == '-' || *endp == '_')) 5399 fatal_error ("malformed spec function name"); 5400 } 5401 if (*endp != '(') /* ) */ 5402 fatal_error ("no arguments for spec function"); 5403 func = save_string (p, endp - p); 5404 p = ++endp; 5405 5406 /* Get the arguments. */ 5407 for (count = 0; *endp != '\0'; endp++) 5408 { 5409 /* ( */ 5410 if (*endp == ')') 5411 { 5412 if (count == 0) 5413 break; 5414 count--; 5415 } 5416 else if (*endp == '(') /* ) */ 5417 count++; 5418 } 5419 /* ( */ 5420 if (*endp != ')') 5421 fatal_error ("malformed spec function arguments"); 5422 args = save_string (p, endp - p); 5423 p = ++endp; 5424 5425 /* p now points to just past the end of the spec function expression. */ 5426 5427 funcval = eval_spec_function (func, args); 5428 if (funcval != NULL && do_spec_1 (funcval, 0, NULL) < 0) 5429 p = NULL; 5430 5431 free (func); 5432 free (args); 5433 5434 processing_spec_function--; 5435 5436 return p; 5437 } 5438 5439 /* Inline subroutine of handle_braces. Returns true if the current 5440 input suffix matches the atom bracketed by ATOM and END_ATOM. */ 5441 static inline bool 5442 input_suffix_matches (const char *atom, const char *end_atom) 5443 { 5444 return (input_suffix 5445 && !strncmp (input_suffix, atom, end_atom - atom) 5446 && input_suffix[end_atom - atom] == '\0'); 5447 } 5448 5449 /* Subroutine of handle_braces. Returns true if the current 5450 input file's spec name matches the atom bracketed by ATOM and END_ATOM. */ 5451 static bool 5452 input_spec_matches (const char *atom, const char *end_atom) 5453 { 5454 return (input_file_compiler 5455 && input_file_compiler->suffix 5456 && input_file_compiler->suffix[0] != '\0' 5457 && !strncmp (input_file_compiler->suffix + 1, atom, 5458 end_atom - atom) 5459 && input_file_compiler->suffix[end_atom - atom + 1] == '\0'); 5460 } 5461 5462 /* Subroutine of handle_braces. Returns true if a switch 5463 matching the atom bracketed by ATOM and END_ATOM appeared on the 5464 command line. */ 5465 static bool 5466 switch_matches (const char *atom, const char *end_atom, int starred) 5467 { 5468 int i; 5469 int len = end_atom - atom; 5470 int plen = starred ? len : -1; 5471 5472 for (i = 0; i < n_switches; i++) 5473 if (!strncmp (switches[i].part1, atom, len) 5474 && (starred || switches[i].part1[len] == '\0') 5475 && check_live_switch (i, plen)) 5476 return true; 5477 5478 /* Check if a switch with separated form matching the atom. 5479 We check -D and -U switches. */ 5480 else if (switches[i].args != 0) 5481 { 5482 if ((*switches[i].part1 == 'D' || *switches[i].part1 == 'U') 5483 && *switches[i].part1 == atom[0]) 5484 { 5485 if (!strncmp (switches[i].args[0], &atom[1], len - 1) 5486 && (starred || (switches[i].part1[1] == '\0' 5487 && switches[i].args[0][len - 1] == '\0')) 5488 && check_live_switch (i, (starred ? 1 : -1))) 5489 return true; 5490 } 5491 } 5492 5493 return false; 5494 } 5495 5496 /* Inline subroutine of handle_braces. Mark all of the switches which 5497 match ATOM (extends to END_ATOM; STARRED indicates whether there 5498 was a star after the atom) for later processing. */ 5499 static inline void 5500 mark_matching_switches (const char *atom, const char *end_atom, int starred) 5501 { 5502 int i; 5503 int len = end_atom - atom; 5504 int plen = starred ? len : -1; 5505 5506 for (i = 0; i < n_switches; i++) 5507 if (!strncmp (switches[i].part1, atom, len) 5508 && (starred || switches[i].part1[len] == '\0') 5509 && check_live_switch (i, plen)) 5510 switches[i].ordering = 1; 5511 } 5512 5513 /* Inline subroutine of handle_braces. Process all the currently 5514 marked switches through give_switch, and clear the marks. */ 5515 static inline void 5516 process_marked_switches (void) 5517 { 5518 int i; 5519 5520 for (i = 0; i < n_switches; i++) 5521 if (switches[i].ordering == 1) 5522 { 5523 switches[i].ordering = 0; 5524 give_switch (i, 0); 5525 } 5526 } 5527 5528 /* Handle a %{ ... } construct. P points just inside the leading {. 5529 Returns a pointer one past the end of the brace block, or 0 5530 if we call do_spec_1 and that returns -1. */ 5531 5532 static const char * 5533 handle_braces (const char *p) 5534 { 5535 const char *atom, *end_atom; 5536 const char *d_atom = NULL, *d_end_atom = NULL; 5537 const char *orig = p; 5538 5539 bool a_is_suffix; 5540 bool a_is_spectype; 5541 bool a_is_starred; 5542 bool a_is_negated; 5543 bool a_matched; 5544 5545 bool a_must_be_last = false; 5546 bool ordered_set = false; 5547 bool disjunct_set = false; 5548 bool disj_matched = false; 5549 bool disj_starred = true; 5550 bool n_way_choice = false; 5551 bool n_way_matched = false; 5552 5553 #define SKIP_WHITE() do { while (*p == ' ' || *p == '\t') p++; } while (0) 5554 5555 do 5556 { 5557 if (a_must_be_last) 5558 goto invalid; 5559 5560 /* Scan one "atom" (S in the description above of %{}, possibly 5561 with '!', '.', '@', ',', or '*' modifiers). */ 5562 a_matched = false; 5563 a_is_suffix = false; 5564 a_is_starred = false; 5565 a_is_negated = false; 5566 a_is_spectype = false; 5567 5568 SKIP_WHITE(); 5569 if (*p == '!') 5570 p++, a_is_negated = true; 5571 5572 SKIP_WHITE(); 5573 if (*p == '.') 5574 p++, a_is_suffix = true; 5575 else if (*p == ',') 5576 p++, a_is_spectype = true; 5577 5578 atom = p; 5579 while (ISIDNUM(*p) || *p == '-' || *p == '+' || *p == '=' 5580 || *p == ',' || *p == '.' || *p == '@') 5581 p++; 5582 end_atom = p; 5583 5584 if (*p == '*') 5585 p++, a_is_starred = 1; 5586 5587 SKIP_WHITE(); 5588 switch (*p) 5589 { 5590 case '&': case '}': 5591 /* Substitute the switch(es) indicated by the current atom. */ 5592 ordered_set = true; 5593 if (disjunct_set || n_way_choice || a_is_negated || a_is_suffix 5594 || a_is_spectype || atom == end_atom) 5595 goto invalid; 5596 5597 mark_matching_switches (atom, end_atom, a_is_starred); 5598 5599 if (*p == '}') 5600 process_marked_switches (); 5601 break; 5602 5603 case '|': case ':': 5604 /* Substitute some text if the current atom appears as a switch 5605 or suffix. */ 5606 disjunct_set = true; 5607 if (ordered_set) 5608 goto invalid; 5609 5610 if (atom == end_atom) 5611 { 5612 if (!n_way_choice || disj_matched || *p == '|' 5613 || a_is_negated || a_is_suffix || a_is_spectype 5614 || a_is_starred) 5615 goto invalid; 5616 5617 /* An empty term may appear as the last choice of an 5618 N-way choice set; it means "otherwise". */ 5619 a_must_be_last = true; 5620 disj_matched = !n_way_matched; 5621 disj_starred = false; 5622 } 5623 else 5624 { 5625 if ((a_is_suffix || a_is_spectype) && a_is_starred) 5626 goto invalid; 5627 5628 if (!a_is_starred) 5629 disj_starred = false; 5630 5631 /* Don't bother testing this atom if we already have a 5632 match. */ 5633 if (!disj_matched && !n_way_matched) 5634 { 5635 if (a_is_suffix) 5636 a_matched = input_suffix_matches (atom, end_atom); 5637 else if (a_is_spectype) 5638 a_matched = input_spec_matches (atom, end_atom); 5639 else 5640 a_matched = switch_matches (atom, end_atom, a_is_starred); 5641 5642 if (a_matched != a_is_negated) 5643 { 5644 disj_matched = true; 5645 d_atom = atom; 5646 d_end_atom = end_atom; 5647 } 5648 } 5649 } 5650 5651 if (*p == ':') 5652 { 5653 /* Found the body, that is, the text to substitute if the 5654 current disjunction matches. */ 5655 p = process_brace_body (p + 1, d_atom, d_end_atom, disj_starred, 5656 disj_matched && !n_way_matched); 5657 if (p == 0) 5658 return 0; 5659 5660 /* If we have an N-way choice, reset state for the next 5661 disjunction. */ 5662 if (*p == ';') 5663 { 5664 n_way_choice = true; 5665 n_way_matched |= disj_matched; 5666 disj_matched = false; 5667 disj_starred = true; 5668 d_atom = d_end_atom = NULL; 5669 } 5670 } 5671 break; 5672 5673 default: 5674 goto invalid; 5675 } 5676 } 5677 while (*p++ != '}'); 5678 5679 return p; 5680 5681 invalid: 5682 fatal_error ("braced spec %qs is invalid at %qc", orig, *p); 5683 5684 #undef SKIP_WHITE 5685 } 5686 5687 /* Subroutine of handle_braces. Scan and process a brace substitution body 5688 (X in the description of %{} syntax). P points one past the colon; 5689 ATOM and END_ATOM bracket the first atom which was found to be true 5690 (present) in the current disjunction; STARRED indicates whether all 5691 the atoms in the current disjunction were starred (for syntax validation); 5692 MATCHED indicates whether the disjunction matched or not, and therefore 5693 whether or not the body is to be processed through do_spec_1 or just 5694 skipped. Returns a pointer to the closing } or ;, or 0 if do_spec_1 5695 returns -1. */ 5696 5697 static const char * 5698 process_brace_body (const char *p, const char *atom, const char *end_atom, 5699 int starred, int matched) 5700 { 5701 const char *body, *end_body; 5702 unsigned int nesting_level; 5703 bool have_subst = false; 5704 5705 /* Locate the closing } or ;, honoring nested braces. 5706 Trim trailing whitespace. */ 5707 body = p; 5708 nesting_level = 1; 5709 for (;;) 5710 { 5711 if (*p == '{') 5712 nesting_level++; 5713 else if (*p == '}') 5714 { 5715 if (!--nesting_level) 5716 break; 5717 } 5718 else if (*p == ';' && nesting_level == 1) 5719 break; 5720 else if (*p == '%' && p[1] == '*' && nesting_level == 1) 5721 have_subst = true; 5722 else if (*p == '\0') 5723 goto invalid; 5724 p++; 5725 } 5726 5727 end_body = p; 5728 while (end_body[-1] == ' ' || end_body[-1] == '\t') 5729 end_body--; 5730 5731 if (have_subst && !starred) 5732 goto invalid; 5733 5734 if (matched) 5735 { 5736 /* Copy the substitution body to permanent storage and execute it. 5737 If have_subst is false, this is a simple matter of running the 5738 body through do_spec_1... */ 5739 char *string = save_string (body, end_body - body); 5740 if (!have_subst) 5741 { 5742 if (do_spec_1 (string, 0, NULL) < 0) 5743 return 0; 5744 } 5745 else 5746 { 5747 /* ... but if have_subst is true, we have to process the 5748 body once for each matching switch, with %* set to the 5749 variant part of the switch. */ 5750 unsigned int hard_match_len = end_atom - atom; 5751 int i; 5752 5753 for (i = 0; i < n_switches; i++) 5754 if (!strncmp (switches[i].part1, atom, hard_match_len) 5755 && check_live_switch (i, hard_match_len)) 5756 { 5757 if (do_spec_1 (string, 0, 5758 &switches[i].part1[hard_match_len]) < 0) 5759 return 0; 5760 /* Pass any arguments this switch has. */ 5761 give_switch (i, 1); 5762 suffix_subst = NULL; 5763 } 5764 } 5765 } 5766 5767 return p; 5768 5769 invalid: 5770 fatal_error ("braced spec body %qs is invalid", body); 5771 } 5772 5773 /* Return 0 iff switch number SWITCHNUM is obsoleted by a later switch 5774 on the command line. PREFIX_LENGTH is the length of XXX in an {XXX*} 5775 spec, or -1 if either exact match or %* is used. 5776 5777 A -O switch is obsoleted by a later -O switch. A -f, -m, or -W switch 5778 whose value does not begin with "no-" is obsoleted by the same value 5779 with the "no-", similarly for a switch with the "no-" prefix. */ 5780 5781 static int 5782 check_live_switch (int switchnum, int prefix_length) 5783 { 5784 const char *name = switches[switchnum].part1; 5785 int i; 5786 5787 /* If we already processed this switch and determined if it was 5788 live or not, return our past determination. */ 5789 if (switches[switchnum].live_cond != 0) 5790 return ((switches[switchnum].live_cond & SWITCH_LIVE) != 0 5791 && (switches[switchnum].live_cond & SWITCH_FALSE) == 0 5792 && (switches[switchnum].live_cond & SWITCH_IGNORE_PERMANENTLY) 5793 == 0); 5794 5795 /* In the common case of {<at-most-one-letter>*}, a negating 5796 switch would always match, so ignore that case. We will just 5797 send the conflicting switches to the compiler phase. */ 5798 if (prefix_length >= 0 && prefix_length <= 1) 5799 return 1; 5800 5801 /* Now search for duplicate in a manner that depends on the name. */ 5802 switch (*name) 5803 { 5804 case 'O': 5805 for (i = switchnum + 1; i < n_switches; i++) 5806 if (switches[i].part1[0] == 'O') 5807 { 5808 switches[switchnum].validated = 1; 5809 switches[switchnum].live_cond = SWITCH_FALSE; 5810 return 0; 5811 } 5812 break; 5813 5814 case 'W': case 'f': case 'm': 5815 if (! strncmp (name + 1, "no-", 3)) 5816 { 5817 /* We have Xno-YYY, search for XYYY. */ 5818 for (i = switchnum + 1; i < n_switches; i++) 5819 if (switches[i].part1[0] == name[0] 5820 && ! strcmp (&switches[i].part1[1], &name[4])) 5821 { 5822 switches[switchnum].validated = 1; 5823 switches[switchnum].live_cond = SWITCH_FALSE; 5824 return 0; 5825 } 5826 } 5827 else 5828 { 5829 /* We have XYYY, search for Xno-YYY. */ 5830 for (i = switchnum + 1; i < n_switches; i++) 5831 if (switches[i].part1[0] == name[0] 5832 && switches[i].part1[1] == 'n' 5833 && switches[i].part1[2] == 'o' 5834 && switches[i].part1[3] == '-' 5835 && !strcmp (&switches[i].part1[4], &name[1])) 5836 { 5837 switches[switchnum].validated = 1; 5838 switches[switchnum].live_cond = SWITCH_FALSE; 5839 return 0; 5840 } 5841 } 5842 break; 5843 } 5844 5845 /* Otherwise the switch is live. */ 5846 switches[switchnum].live_cond |= SWITCH_LIVE; 5847 return 1; 5848 } 5849 5850 /* Pass a switch to the current accumulating command 5851 in the same form that we received it. 5852 SWITCHNUM identifies the switch; it is an index into 5853 the vector of switches gcc received, which is `switches'. 5854 This cannot fail since it never finishes a command line. 5855 5856 If OMIT_FIRST_WORD is nonzero, then we omit .part1 of the argument. */ 5857 5858 static void 5859 give_switch (int switchnum, int omit_first_word) 5860 { 5861 if ((switches[switchnum].live_cond & SWITCH_IGNORE) != 0) 5862 return; 5863 5864 if (!omit_first_word) 5865 { 5866 do_spec_1 ("-", 0, NULL); 5867 do_spec_1 (switches[switchnum].part1, 1, NULL); 5868 } 5869 5870 if (switches[switchnum].args != 0) 5871 { 5872 const char **p; 5873 for (p = switches[switchnum].args; *p; p++) 5874 { 5875 const char *arg = *p; 5876 5877 do_spec_1 (" ", 0, NULL); 5878 if (suffix_subst) 5879 { 5880 unsigned length = strlen (arg); 5881 int dot = 0; 5882 5883 while (length-- && !IS_DIR_SEPARATOR (arg[length])) 5884 if (arg[length] == '.') 5885 { 5886 (CONST_CAST(char *, arg))[length] = 0; 5887 dot = 1; 5888 break; 5889 } 5890 do_spec_1 (arg, 1, NULL); 5891 if (dot) 5892 (CONST_CAST(char *, arg))[length] = '.'; 5893 do_spec_1 (suffix_subst, 1, NULL); 5894 } 5895 else 5896 do_spec_1 (arg, 1, NULL); 5897 } 5898 } 5899 5900 do_spec_1 (" ", 0, NULL); 5901 switches[switchnum].validated = 1; 5902 } 5903 5904 /* Search for a file named NAME trying various prefixes including the 5905 user's -B prefix and some standard ones. 5906 Return the absolute file name found. If nothing is found, return NAME. */ 5907 5908 static const char * 5909 find_file (const char *name) 5910 { 5911 char *newname = find_a_file (&startfile_prefixes, name, R_OK, true); 5912 return newname ? newname : name; 5913 } 5914 5915 /* Determine whether a directory exists. If LINKER, return 0 for 5916 certain fixed names not needed by the linker. */ 5917 5918 static int 5919 is_directory (const char *path1, bool linker) 5920 { 5921 int len1; 5922 char *path; 5923 char *cp; 5924 struct stat st; 5925 5926 /* Ensure the string ends with "/.". The resulting path will be a 5927 directory even if the given path is a symbolic link. */ 5928 len1 = strlen (path1); 5929 path = (char *) alloca (3 + len1); 5930 memcpy (path, path1, len1); 5931 cp = path + len1; 5932 if (!IS_DIR_SEPARATOR (cp[-1])) 5933 *cp++ = DIR_SEPARATOR; 5934 *cp++ = '.'; 5935 *cp = '\0'; 5936 5937 /* Exclude directories that the linker is known to search. */ 5938 if (linker 5939 && IS_DIR_SEPARATOR (path[0]) 5940 && ((cp - path == 6 5941 && filename_ncmp (path + 1, "lib", 3) == 0) 5942 || (cp - path == 10 5943 && filename_ncmp (path + 1, "usr", 3) == 0 5944 && IS_DIR_SEPARATOR (path[4]) 5945 && filename_ncmp (path + 5, "lib", 3) == 0))) 5946 return 0; 5947 5948 return (stat (path, &st) >= 0 && S_ISDIR (st.st_mode)); 5949 } 5950 5951 /* Set up the various global variables to indicate that we're processing 5952 the input file named FILENAME. */ 5953 5954 void 5955 set_input (const char *filename) 5956 { 5957 const char *p; 5958 5959 gcc_input_filename = filename; 5960 input_filename_length = strlen (gcc_input_filename); 5961 input_basename = lbasename (gcc_input_filename); 5962 5963 /* Find a suffix starting with the last period, 5964 and set basename_length to exclude that suffix. */ 5965 basename_length = strlen (input_basename); 5966 suffixed_basename_length = basename_length; 5967 p = input_basename + basename_length; 5968 while (p != input_basename && *p != '.') 5969 --p; 5970 if (*p == '.' && p != input_basename) 5971 { 5972 basename_length = p - input_basename; 5973 input_suffix = p + 1; 5974 } 5975 else 5976 input_suffix = ""; 5977 5978 /* If a spec for 'g', 'u', or 'U' is seen with -save-temps then 5979 we will need to do a stat on the gcc_input_filename. The 5980 INPUT_STAT_SET signals that the stat is needed. */ 5981 input_stat_set = 0; 5982 } 5983 5984 /* On fatal signals, delete all the temporary files. */ 5985 5986 static void 5987 fatal_signal (int signum) 5988 { 5989 signal (signum, SIG_DFL); 5990 delete_failure_queue (); 5991 delete_temp_files (); 5992 /* Get the same signal again, this time not handled, 5993 so its normal effect occurs. */ 5994 kill (getpid (), signum); 5995 } 5996 5997 /* Compare the contents of the two files named CMPFILE[0] and 5998 CMPFILE[1]. Return zero if they're identical, nonzero 5999 otherwise. */ 6000 6001 static int 6002 compare_files (char *cmpfile[]) 6003 { 6004 int ret = 0; 6005 FILE *temp[2] = { NULL, NULL }; 6006 int i; 6007 6008 #if HAVE_MMAP_FILE 6009 { 6010 size_t length[2]; 6011 void *map[2] = { NULL, NULL }; 6012 6013 for (i = 0; i < 2; i++) 6014 { 6015 struct stat st; 6016 6017 if (stat (cmpfile[i], &st) < 0 || !S_ISREG (st.st_mode)) 6018 { 6019 error ("%s: could not determine length of compare-debug file %s", 6020 gcc_input_filename, cmpfile[i]); 6021 ret = 1; 6022 break; 6023 } 6024 6025 length[i] = st.st_size; 6026 } 6027 6028 if (!ret && length[0] != length[1]) 6029 { 6030 error ("%s: -fcompare-debug failure (length)", gcc_input_filename); 6031 ret = 1; 6032 } 6033 6034 if (!ret) 6035 for (i = 0; i < 2; i++) 6036 { 6037 int fd = open (cmpfile[i], O_RDONLY); 6038 if (fd < 0) 6039 { 6040 error ("%s: could not open compare-debug file %s", 6041 gcc_input_filename, cmpfile[i]); 6042 ret = 1; 6043 break; 6044 } 6045 6046 map[i] = mmap (NULL, length[i], PROT_READ, MAP_PRIVATE, fd, 0); 6047 close (fd); 6048 6049 if (map[i] == (void *) MAP_FAILED) 6050 { 6051 ret = -1; 6052 break; 6053 } 6054 } 6055 6056 if (!ret) 6057 { 6058 if (memcmp (map[0], map[1], length[0]) != 0) 6059 { 6060 error ("%s: -fcompare-debug failure", gcc_input_filename); 6061 ret = 1; 6062 } 6063 } 6064 6065 for (i = 0; i < 2; i++) 6066 if (map[i]) 6067 munmap ((caddr_t) map[i], length[i]); 6068 6069 if (ret >= 0) 6070 return ret; 6071 6072 ret = 0; 6073 } 6074 #endif 6075 6076 for (i = 0; i < 2; i++) 6077 { 6078 temp[i] = fopen (cmpfile[i], "r"); 6079 if (!temp[i]) 6080 { 6081 error ("%s: could not open compare-debug file %s", 6082 gcc_input_filename, cmpfile[i]); 6083 ret = 1; 6084 break; 6085 } 6086 } 6087 6088 if (!ret && temp[0] && temp[1]) 6089 for (;;) 6090 { 6091 int c0, c1; 6092 c0 = fgetc (temp[0]); 6093 c1 = fgetc (temp[1]); 6094 6095 if (c0 != c1) 6096 { 6097 error ("%s: -fcompare-debug failure", 6098 gcc_input_filename); 6099 ret = 1; 6100 break; 6101 } 6102 6103 if (c0 == EOF) 6104 break; 6105 } 6106 6107 for (i = 1; i >= 0; i--) 6108 { 6109 if (temp[i]) 6110 fclose (temp[i]); 6111 } 6112 6113 return ret; 6114 } 6115 6116 extern int main (int, char **); 6117 6118 int 6119 main (int argc, char **argv) 6120 { 6121 size_t i; 6122 int value; 6123 int linker_was_run = 0; 6124 int lang_n_infiles = 0; 6125 int num_linker_inputs = 0; 6126 char *explicit_link_files; 6127 char *specs_file; 6128 char *lto_wrapper_file; 6129 const char *p; 6130 struct user_specs *uptr; 6131 char **old_argv = argv; 6132 struct cl_decoded_option *decoded_options; 6133 unsigned int decoded_options_count; 6134 6135 /* Initialize here, not in definition. The IRIX 6 O32 cc sometimes chokes 6136 on ?: in file-scope variable initializations. */ 6137 asm_debug = ASM_DEBUG_SPEC; 6138 6139 p = argv[0] + strlen (argv[0]); 6140 while (p != argv[0] && !IS_DIR_SEPARATOR (p[-1])) 6141 --p; 6142 progname = p; 6143 6144 xmalloc_set_program_name (progname); 6145 6146 expandargv (&argc, &argv); 6147 6148 /* Determine if any expansions were made. */ 6149 if (argv != old_argv) 6150 at_file_supplied = true; 6151 6152 /* Register the language-independent parameters. */ 6153 global_init_params (); 6154 finish_params (); 6155 6156 init_options_struct (&global_options, &global_options_set); 6157 6158 decode_cmdline_options_to_array (argc, CONST_CAST2 (const char **, char **, 6159 argv), 6160 CL_DRIVER, 6161 &decoded_options, &decoded_options_count); 6162 6163 #ifdef GCC_DRIVER_HOST_INITIALIZATION 6164 /* Perform host dependent initialization when needed. */ 6165 GCC_DRIVER_HOST_INITIALIZATION; 6166 #endif 6167 6168 /* Unlock the stdio streams. */ 6169 unlock_std_streams (); 6170 6171 gcc_init_libintl (); 6172 6173 diagnostic_initialize (global_dc, 0); 6174 if (atexit (delete_temp_files) != 0) 6175 fatal_error ("atexit failed"); 6176 6177 if (signal (SIGINT, SIG_IGN) != SIG_IGN) 6178 signal (SIGINT, fatal_signal); 6179 #ifdef SIGHUP 6180 if (signal (SIGHUP, SIG_IGN) != SIG_IGN) 6181 signal (SIGHUP, fatal_signal); 6182 #endif 6183 if (signal (SIGTERM, SIG_IGN) != SIG_IGN) 6184 signal (SIGTERM, fatal_signal); 6185 #ifdef SIGPIPE 6186 if (signal (SIGPIPE, SIG_IGN) != SIG_IGN) 6187 signal (SIGPIPE, fatal_signal); 6188 #endif 6189 #ifdef SIGCHLD 6190 /* We *MUST* set SIGCHLD to SIG_DFL so that the wait4() call will 6191 receive the signal. A different setting is inheritable */ 6192 signal (SIGCHLD, SIG_DFL); 6193 #endif 6194 6195 /* Parsing and gimplification sometimes need quite large stack. 6196 Increase stack size limits if possible. */ 6197 stack_limit_increase (64 * 1024 * 1024); 6198 6199 /* Allocate the argument vector. */ 6200 alloc_args (); 6201 6202 obstack_init (&obstack); 6203 6204 /* Build multilib_select, et. al from the separate lines that make up each 6205 multilib selection. */ 6206 { 6207 const char *const *q = multilib_raw; 6208 int need_space; 6209 6210 obstack_init (&multilib_obstack); 6211 while ((p = *q++) != (char *) 0) 6212 obstack_grow (&multilib_obstack, p, strlen (p)); 6213 6214 obstack_1grow (&multilib_obstack, 0); 6215 multilib_select = XOBFINISH (&multilib_obstack, const char *); 6216 6217 q = multilib_matches_raw; 6218 while ((p = *q++) != (char *) 0) 6219 obstack_grow (&multilib_obstack, p, strlen (p)); 6220 6221 obstack_1grow (&multilib_obstack, 0); 6222 multilib_matches = XOBFINISH (&multilib_obstack, const char *); 6223 6224 q = multilib_exclusions_raw; 6225 while ((p = *q++) != (char *) 0) 6226 obstack_grow (&multilib_obstack, p, strlen (p)); 6227 6228 obstack_1grow (&multilib_obstack, 0); 6229 multilib_exclusions = XOBFINISH (&multilib_obstack, const char *); 6230 6231 need_space = FALSE; 6232 for (i = 0; i < ARRAY_SIZE (multilib_defaults_raw); i++) 6233 { 6234 if (need_space) 6235 obstack_1grow (&multilib_obstack, ' '); 6236 obstack_grow (&multilib_obstack, 6237 multilib_defaults_raw[i], 6238 strlen (multilib_defaults_raw[i])); 6239 need_space = TRUE; 6240 } 6241 6242 obstack_1grow (&multilib_obstack, 0); 6243 multilib_defaults = XOBFINISH (&multilib_obstack, const char *); 6244 } 6245 6246 #ifdef INIT_ENVIRONMENT 6247 /* Set up any other necessary machine specific environment variables. */ 6248 xputenv (INIT_ENVIRONMENT); 6249 #endif 6250 6251 /* Make a table of what switches there are (switches, n_switches). 6252 Make a table of specified input files (infiles, n_infiles). 6253 Decode switches that are handled locally. */ 6254 6255 process_command (decoded_options_count, decoded_options); 6256 6257 /* Initialize the vector of specs to just the default. 6258 This means one element containing 0s, as a terminator. */ 6259 6260 compilers = XNEWVAR (struct compiler, sizeof default_compilers); 6261 memcpy (compilers, default_compilers, sizeof default_compilers); 6262 n_compilers = n_default_compilers; 6263 6264 /* Read specs from a file if there is one. */ 6265 6266 machine_suffix = concat (spec_machine, dir_separator_str, 6267 spec_version, dir_separator_str, NULL); 6268 just_machine_suffix = concat (spec_machine, dir_separator_str, NULL); 6269 6270 specs_file = find_a_file (&startfile_prefixes, "specs", R_OK, true); 6271 /* Read the specs file unless it is a default one. */ 6272 if (specs_file != 0 && strcmp (specs_file, "specs")) 6273 read_specs (specs_file, TRUE); 6274 else 6275 init_spec (); 6276 6277 /* We need to check standard_exec_prefix/just_machine_suffix/specs 6278 for any override of as, ld and libraries. */ 6279 specs_file = (char *) alloca (strlen (standard_exec_prefix) 6280 + strlen (just_machine_suffix) + sizeof ("specs")); 6281 6282 strcpy (specs_file, standard_exec_prefix); 6283 strcat (specs_file, just_machine_suffix); 6284 strcat (specs_file, "specs"); 6285 if (access (specs_file, R_OK) == 0) 6286 read_specs (specs_file, TRUE); 6287 6288 /* Process any configure-time defaults specified for the command line 6289 options, via OPTION_DEFAULT_SPECS. */ 6290 for (i = 0; i < ARRAY_SIZE (option_default_specs); i++) 6291 do_option_spec (option_default_specs[i].name, 6292 option_default_specs[i].spec); 6293 6294 /* Process DRIVER_SELF_SPECS, adding any new options to the end 6295 of the command line. */ 6296 6297 for (i = 0; i < ARRAY_SIZE (driver_self_specs); i++) 6298 do_self_spec (driver_self_specs[i]); 6299 6300 /* If not cross-compiling, look for executables in the standard 6301 places. */ 6302 if (*cross_compile == '0') 6303 { 6304 if (*md_exec_prefix) 6305 { 6306 add_prefix (&exec_prefixes, md_exec_prefix, "GCC", 6307 PREFIX_PRIORITY_LAST, 0, 0); 6308 } 6309 } 6310 6311 /* Process sysroot_suffix_spec. */ 6312 if (*sysroot_suffix_spec != 0 6313 && do_spec_2 (sysroot_suffix_spec) == 0) 6314 { 6315 if (VEC_length (const_char_p, argbuf) > 1) 6316 error ("spec failure: more than one arg to SYSROOT_SUFFIX_SPEC"); 6317 else if (VEC_length (const_char_p, argbuf) == 1) 6318 target_sysroot_suffix = xstrdup (VEC_last (const_char_p, argbuf)); 6319 } 6320 6321 #ifdef HAVE_LD_SYSROOT 6322 /* Pass the --sysroot option to the linker, if it supports that. If 6323 there is a sysroot_suffix_spec, it has already been processed by 6324 this point, so target_system_root really is the system root we 6325 should be using. */ 6326 if (target_system_root) 6327 { 6328 obstack_grow (&obstack, "%(sysroot_spec) ", strlen ("%(sysroot_spec) ")); 6329 obstack_grow0 (&obstack, link_spec, strlen (link_spec)); 6330 set_spec ("link", XOBFINISH (&obstack, const char *)); 6331 } 6332 #endif 6333 6334 /* Process sysroot_hdrs_suffix_spec. */ 6335 if (*sysroot_hdrs_suffix_spec != 0 6336 && do_spec_2 (sysroot_hdrs_suffix_spec) == 0) 6337 { 6338 if (VEC_length (const_char_p, argbuf) > 1) 6339 error ("spec failure: more than one arg to SYSROOT_HEADERS_SUFFIX_SPEC"); 6340 else if (VEC_length (const_char_p, argbuf) == 1) 6341 target_sysroot_hdrs_suffix = xstrdup (VEC_last (const_char_p, argbuf)); 6342 } 6343 6344 /* Look for startfiles in the standard places. */ 6345 if (*startfile_prefix_spec != 0 6346 && do_spec_2 (startfile_prefix_spec) == 0 6347 && do_spec_1 (" ", 0, NULL) == 0) 6348 { 6349 const char *arg; 6350 int ndx; 6351 FOR_EACH_VEC_ELT (const_char_p, argbuf, ndx, arg) 6352 add_sysrooted_prefix (&startfile_prefixes, arg, "BINUTILS", 6353 PREFIX_PRIORITY_LAST, 0, 1); 6354 } 6355 /* We should eventually get rid of all these and stick to 6356 startfile_prefix_spec exclusively. */ 6357 else if (*cross_compile == '0' || target_system_root) 6358 { 6359 if (*md_startfile_prefix) 6360 add_sysrooted_prefix (&startfile_prefixes, md_startfile_prefix, 6361 "GCC", PREFIX_PRIORITY_LAST, 0, 1); 6362 6363 if (*md_startfile_prefix_1) 6364 add_sysrooted_prefix (&startfile_prefixes, md_startfile_prefix_1, 6365 "GCC", PREFIX_PRIORITY_LAST, 0, 1); 6366 6367 /* If standard_startfile_prefix is relative, base it on 6368 standard_exec_prefix. This lets us move the installed tree 6369 as a unit. If GCC_EXEC_PREFIX is defined, base 6370 standard_startfile_prefix on that as well. 6371 6372 If the prefix is relative, only search it for native compilers; 6373 otherwise we will search a directory containing host libraries. */ 6374 if (IS_ABSOLUTE_PATH (standard_startfile_prefix)) 6375 add_sysrooted_prefix (&startfile_prefixes, 6376 standard_startfile_prefix, "BINUTILS", 6377 PREFIX_PRIORITY_LAST, 0, 1); 6378 else if (*cross_compile == '0') 6379 { 6380 add_prefix (&startfile_prefixes, 6381 concat (gcc_exec_prefix 6382 ? gcc_exec_prefix : standard_exec_prefix, 6383 machine_suffix, 6384 standard_startfile_prefix, NULL), 6385 NULL, PREFIX_PRIORITY_LAST, 0, 1); 6386 } 6387 6388 /* Sysrooted prefixes are relocated because target_system_root is 6389 also relocated by gcc_exec_prefix. */ 6390 if (*standard_startfile_prefix_1) 6391 add_sysrooted_prefix (&startfile_prefixes, 6392 standard_startfile_prefix_1, "BINUTILS", 6393 PREFIX_PRIORITY_LAST, 0, 1); 6394 if (*standard_startfile_prefix_2) 6395 add_sysrooted_prefix (&startfile_prefixes, 6396 standard_startfile_prefix_2, "BINUTILS", 6397 PREFIX_PRIORITY_LAST, 0, 1); 6398 } 6399 6400 /* Process any user specified specs in the order given on the command 6401 line. */ 6402 for (uptr = user_specs_head; uptr; uptr = uptr->next) 6403 { 6404 char *filename = find_a_file (&startfile_prefixes, uptr->filename, 6405 R_OK, true); 6406 read_specs (filename ? filename : uptr->filename, FALSE); 6407 } 6408 6409 /* Process any user self specs. */ 6410 { 6411 struct spec_list *sl; 6412 for (sl = specs; sl; sl = sl->next) 6413 if (sl->name_len == sizeof "self_spec" - 1 6414 && !strcmp (sl->name, "self_spec")) 6415 do_self_spec (*sl->ptr_spec); 6416 } 6417 6418 if (compare_debug) 6419 { 6420 enum save_temps save; 6421 6422 if (!compare_debug_second) 6423 { 6424 n_switches_debug_check[1] = n_switches; 6425 n_switches_alloc_debug_check[1] = n_switches_alloc; 6426 switches_debug_check[1] = XDUPVEC (struct switchstr, switches, 6427 n_switches_alloc); 6428 6429 do_self_spec ("%:compare-debug-self-opt()"); 6430 n_switches_debug_check[0] = n_switches; 6431 n_switches_alloc_debug_check[0] = n_switches_alloc; 6432 switches_debug_check[0] = switches; 6433 6434 n_switches = n_switches_debug_check[1]; 6435 n_switches_alloc = n_switches_alloc_debug_check[1]; 6436 switches = switches_debug_check[1]; 6437 } 6438 6439 /* Avoid crash when computing %j in this early. */ 6440 save = save_temps_flag; 6441 save_temps_flag = SAVE_TEMPS_NONE; 6442 6443 compare_debug = -compare_debug; 6444 do_self_spec ("%:compare-debug-self-opt()"); 6445 6446 save_temps_flag = save; 6447 6448 if (!compare_debug_second) 6449 { 6450 n_switches_debug_check[1] = n_switches; 6451 n_switches_alloc_debug_check[1] = n_switches_alloc; 6452 switches_debug_check[1] = switches; 6453 compare_debug = -compare_debug; 6454 n_switches = n_switches_debug_check[0]; 6455 n_switches_alloc = n_switches_debug_check[0]; 6456 switches = switches_debug_check[0]; 6457 } 6458 } 6459 6460 6461 /* If we have a GCC_EXEC_PREFIX envvar, modify it for cpp's sake. */ 6462 if (gcc_exec_prefix) 6463 gcc_exec_prefix = concat (gcc_exec_prefix, spec_machine, dir_separator_str, 6464 spec_version, dir_separator_str, NULL); 6465 6466 /* Now we have the specs. 6467 Set the `valid' bits for switches that match anything in any spec. */ 6468 6469 validate_all_switches (); 6470 6471 /* Now that we have the switches and the specs, set 6472 the subdirectory based on the options. */ 6473 set_multilib_dir (); 6474 6475 /* Set up to remember the pathname of gcc and any options 6476 needed for collect. We use argv[0] instead of progname because 6477 we need the complete pathname. */ 6478 obstack_init (&collect_obstack); 6479 obstack_grow (&collect_obstack, "COLLECT_GCC=", sizeof ("COLLECT_GCC=") - 1); 6480 obstack_grow (&collect_obstack, argv[0], strlen (argv[0]) + 1); 6481 xputenv (XOBFINISH (&collect_obstack, char *)); 6482 6483 /* Set up to remember the pathname of the lto wrapper. */ 6484 6485 if (have_c) 6486 lto_wrapper_file = NULL; 6487 else 6488 lto_wrapper_file = find_a_file (&exec_prefixes, "lto-wrapper", 6489 X_OK, false); 6490 if (lto_wrapper_file) 6491 { 6492 lto_wrapper_spec = lto_wrapper_file; 6493 obstack_init (&collect_obstack); 6494 obstack_grow (&collect_obstack, "COLLECT_LTO_WRAPPER=", 6495 sizeof ("COLLECT_LTO_WRAPPER=") - 1); 6496 obstack_grow (&collect_obstack, lto_wrapper_spec, 6497 strlen (lto_wrapper_spec) + 1); 6498 xputenv (XOBFINISH (&collect_obstack, char *)); 6499 } 6500 6501 /* Warn about any switches that no pass was interested in. */ 6502 6503 for (i = 0; (int) i < n_switches; i++) 6504 if (! switches[i].validated) 6505 error ("unrecognized option %<-%s%>", switches[i].part1); 6506 6507 /* Obey some of the options. */ 6508 6509 if (print_search_dirs) 6510 { 6511 printf (_("install: %s\n"), STD_EXEC_PATH); 6512 printf (_("programs: %s\n"), 6513 build_search_list (&exec_prefixes, "", false, false)); 6514 printf (_("libraries: %s\n"), 6515 build_search_list (&startfile_prefixes, "", false, true)); 6516 return (0); 6517 } 6518 6519 if (print_file_name) 6520 { 6521 printf ("%s\n", find_file (print_file_name)); 6522 return (0); 6523 } 6524 6525 if (print_prog_name) 6526 { 6527 char *newname = find_a_file (&exec_prefixes, print_prog_name, X_OK, 0); 6528 printf ("%s\n", (newname ? newname : print_prog_name)); 6529 return (0); 6530 } 6531 6532 if (print_multi_lib) 6533 { 6534 print_multilib_info (); 6535 return (0); 6536 } 6537 6538 if (print_multi_directory) 6539 { 6540 if (multilib_dir == NULL) 6541 printf (".\n"); 6542 else 6543 printf ("%s\n", multilib_dir); 6544 return (0); 6545 } 6546 6547 if (print_sysroot) 6548 { 6549 if (target_system_root) 6550 { 6551 if (target_sysroot_suffix) 6552 printf ("%s%s\n", target_system_root, target_sysroot_suffix); 6553 else 6554 printf ("%s\n", target_system_root); 6555 } 6556 return (0); 6557 } 6558 6559 if (print_multi_os_directory) 6560 { 6561 if (multilib_os_dir == NULL) 6562 printf (".\n"); 6563 else 6564 printf ("%s\n", multilib_os_dir); 6565 return (0); 6566 } 6567 6568 if (print_sysroot_headers_suffix) 6569 { 6570 if (*sysroot_hdrs_suffix_spec) 6571 { 6572 printf("%s\n", (target_sysroot_hdrs_suffix 6573 ? target_sysroot_hdrs_suffix 6574 : "")); 6575 return (0); 6576 } 6577 else 6578 /* The error status indicates that only one set of fixed 6579 headers should be built. */ 6580 fatal_error ("not configured with sysroot headers suffix"); 6581 } 6582 6583 if (print_help_list) 6584 { 6585 display_help (); 6586 6587 if (! verbose_flag) 6588 { 6589 printf (_("\nFor bug reporting instructions, please see:\n")); 6590 printf ("%s.\n", bug_report_url); 6591 6592 return (0); 6593 } 6594 6595 /* We do not exit here. Instead we have created a fake input file 6596 called 'help-dummy' which needs to be compiled, and we pass this 6597 on the various sub-processes, along with the --help switch. 6598 Ensure their output appears after ours. */ 6599 fputc ('\n', stdout); 6600 fflush (stdout); 6601 } 6602 6603 if (print_version) 6604 { 6605 printf (_("%s %s%s\n"), progname, pkgversion_string, 6606 version_string); 6607 printf ("Copyright %s 2012 Free Software Foundation, Inc.\n", 6608 _("(C)")); 6609 fputs (_("This is free software; see the source for copying conditions. There is NO\n\ 6610 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\n"), 6611 stdout); 6612 if (! verbose_flag) 6613 return 0; 6614 6615 /* We do not exit here. We use the same mechanism of --help to print 6616 the version of the sub-processes. */ 6617 fputc ('\n', stdout); 6618 fflush (stdout); 6619 } 6620 6621 if (verbose_flag) 6622 { 6623 int n; 6624 const char *thrmod; 6625 6626 fnotice (stderr, "Target: %s\n", spec_machine); 6627 fnotice (stderr, "Configured with: %s\n", configuration_arguments); 6628 6629 #ifdef THREAD_MODEL_SPEC 6630 /* We could have defined THREAD_MODEL_SPEC to "%*" by default, 6631 but there's no point in doing all this processing just to get 6632 thread_model back. */ 6633 obstack_init (&obstack); 6634 do_spec_1 (THREAD_MODEL_SPEC, 0, thread_model); 6635 obstack_1grow (&obstack, '\0'); 6636 thrmod = XOBFINISH (&obstack, const char *); 6637 #else 6638 thrmod = thread_model; 6639 #endif 6640 6641 fnotice (stderr, "Thread model: %s\n", thrmod); 6642 6643 /* compiler_version is truncated at the first space when initialized 6644 from version string, so truncate version_string at the first space 6645 before comparing. */ 6646 for (n = 0; version_string[n]; n++) 6647 if (version_string[n] == ' ') 6648 break; 6649 6650 if (! strncmp (version_string, compiler_version, n) 6651 && compiler_version[n] == 0) 6652 fnotice (stderr, "gcc version %s %s\n", version_string, 6653 pkgversion_string); 6654 else 6655 fnotice (stderr, "gcc driver version %s %sexecuting gcc version %s\n", 6656 version_string, pkgversion_string, compiler_version); 6657 6658 if (n_infiles == 0) 6659 return (0); 6660 } 6661 6662 if (n_infiles == added_libraries) 6663 fatal_error ("no input files"); 6664 6665 if (seen_error ()) 6666 goto out; 6667 6668 /* Make a place to record the compiler output file names 6669 that correspond to the input files. */ 6670 6671 i = n_infiles; 6672 i += lang_specific_extra_outfiles; 6673 outfiles = XCNEWVEC (const char *, i); 6674 6675 /* Record which files were specified explicitly as link input. */ 6676 6677 explicit_link_files = XCNEWVEC (char, n_infiles); 6678 6679 combine_inputs = have_o || flag_wpa; 6680 6681 for (i = 0; (int) i < n_infiles; i++) 6682 { 6683 const char *name = infiles[i].name; 6684 struct compiler *compiler = lookup_compiler (name, 6685 strlen (name), 6686 infiles[i].language); 6687 6688 if (compiler && !(compiler->combinable)) 6689 combine_inputs = false; 6690 6691 if (lang_n_infiles > 0 && compiler != input_file_compiler 6692 && infiles[i].language && infiles[i].language[0] != '*') 6693 infiles[i].incompiler = compiler; 6694 else if (compiler) 6695 { 6696 lang_n_infiles++; 6697 input_file_compiler = compiler; 6698 infiles[i].incompiler = compiler; 6699 } 6700 else 6701 { 6702 /* Since there is no compiler for this input file, assume it is a 6703 linker file. */ 6704 explicit_link_files[i] = 1; 6705 infiles[i].incompiler = NULL; 6706 } 6707 infiles[i].compiled = false; 6708 infiles[i].preprocessed = false; 6709 } 6710 6711 if (!combine_inputs && have_c && have_o && lang_n_infiles > 1) 6712 fatal_error ("cannot specify -o with -c, -S or -E with multiple files"); 6713 6714 for (i = 0; (int) i < n_infiles; i++) 6715 { 6716 int this_file_error = 0; 6717 6718 /* Tell do_spec what to substitute for %i. */ 6719 6720 input_file_number = i; 6721 set_input (infiles[i].name); 6722 6723 if (infiles[i].compiled) 6724 continue; 6725 6726 /* Use the same thing in %o, unless cp->spec says otherwise. */ 6727 6728 outfiles[i] = gcc_input_filename; 6729 6730 /* Figure out which compiler from the file's suffix. */ 6731 6732 input_file_compiler 6733 = lookup_compiler (infiles[i].name, input_filename_length, 6734 infiles[i].language); 6735 6736 if (input_file_compiler) 6737 { 6738 /* Ok, we found an applicable compiler. Run its spec. */ 6739 6740 if (input_file_compiler->spec[0] == '#') 6741 { 6742 error ("%s: %s compiler not installed on this system", 6743 gcc_input_filename, &input_file_compiler->spec[1]); 6744 this_file_error = 1; 6745 } 6746 else 6747 { 6748 if (compare_debug) 6749 { 6750 free (debug_check_temp_file[0]); 6751 debug_check_temp_file[0] = NULL; 6752 6753 free (debug_check_temp_file[1]); 6754 debug_check_temp_file[1] = NULL; 6755 } 6756 6757 value = do_spec (input_file_compiler->spec); 6758 infiles[i].compiled = true; 6759 if (value < 0) 6760 this_file_error = 1; 6761 else if (compare_debug && debug_check_temp_file[0]) 6762 { 6763 if (verbose_flag) 6764 inform (0, "recompiling with -fcompare-debug"); 6765 6766 compare_debug = -compare_debug; 6767 n_switches = n_switches_debug_check[1]; 6768 n_switches_alloc = n_switches_alloc_debug_check[1]; 6769 switches = switches_debug_check[1]; 6770 6771 value = do_spec (input_file_compiler->spec); 6772 6773 compare_debug = -compare_debug; 6774 n_switches = n_switches_debug_check[0]; 6775 n_switches_alloc = n_switches_alloc_debug_check[0]; 6776 switches = switches_debug_check[0]; 6777 6778 if (value < 0) 6779 { 6780 error ("during -fcompare-debug recompilation"); 6781 this_file_error = 1; 6782 } 6783 6784 gcc_assert (debug_check_temp_file[1] 6785 && filename_cmp (debug_check_temp_file[0], 6786 debug_check_temp_file[1])); 6787 6788 if (verbose_flag) 6789 inform (0, "comparing final insns dumps"); 6790 6791 if (compare_files (debug_check_temp_file)) 6792 this_file_error = 1; 6793 } 6794 6795 if (compare_debug) 6796 { 6797 free (debug_check_temp_file[0]); 6798 debug_check_temp_file[0] = NULL; 6799 6800 free (debug_check_temp_file[1]); 6801 debug_check_temp_file[1] = NULL; 6802 } 6803 } 6804 } 6805 6806 /* If this file's name does not contain a recognized suffix, 6807 record it as explicit linker input. */ 6808 6809 else 6810 explicit_link_files[i] = 1; 6811 6812 /* Clear the delete-on-failure queue, deleting the files in it 6813 if this compilation failed. */ 6814 6815 if (this_file_error) 6816 { 6817 delete_failure_queue (); 6818 errorcount++; 6819 } 6820 /* If this compilation succeeded, don't delete those files later. */ 6821 clear_failure_queue (); 6822 } 6823 6824 /* Reset the input file name to the first compile/object file name, for use 6825 with %b in LINK_SPEC. We use the first input file that we can find 6826 a compiler to compile it instead of using infiles.language since for 6827 languages other than C we use aliases that we then lookup later. */ 6828 if (n_infiles > 0) 6829 { 6830 int i; 6831 6832 for (i = 0; i < n_infiles ; i++) 6833 if (infiles[i].incompiler 6834 || (infiles[i].language && infiles[i].language[0] != '*')) 6835 { 6836 set_input (infiles[i].name); 6837 break; 6838 } 6839 } 6840 6841 if (!seen_error ()) 6842 { 6843 /* Make sure INPUT_FILE_NUMBER points to first available open 6844 slot. */ 6845 input_file_number = n_infiles; 6846 if (lang_specific_pre_link ()) 6847 errorcount++; 6848 } 6849 6850 /* Determine if there are any linker input files. */ 6851 num_linker_inputs = 0; 6852 for (i = 0; (int) i < n_infiles; i++) 6853 if (explicit_link_files[i] || outfiles[i] != NULL) 6854 num_linker_inputs++; 6855 6856 /* Run ld to link all the compiler output files. */ 6857 6858 if (num_linker_inputs > 0 && !seen_error () && print_subprocess_help < 2) 6859 { 6860 int tmp = execution_count; 6861 6862 if (! have_c) 6863 { 6864 #if HAVE_LTO_PLUGIN > 0 6865 #if HAVE_LTO_PLUGIN == 2 6866 const char *fno_use_linker_plugin = "fno-use-linker-plugin"; 6867 #else 6868 const char *fuse_linker_plugin = "fuse-linker-plugin"; 6869 #endif 6870 #endif 6871 6872 /* We'll use ld if we can't find collect2. */ 6873 if (! strcmp (linker_name_spec, "collect2")) 6874 { 6875 char *s = find_a_file (&exec_prefixes, "collect2", X_OK, false); 6876 if (s == NULL) 6877 linker_name_spec = "ld"; 6878 } 6879 6880 #if HAVE_LTO_PLUGIN > 0 6881 #if HAVE_LTO_PLUGIN == 2 6882 if (!switch_matches (fno_use_linker_plugin, 6883 fno_use_linker_plugin 6884 + strlen (fno_use_linker_plugin), 0)) 6885 #else 6886 if (switch_matches (fuse_linker_plugin, 6887 fuse_linker_plugin 6888 + strlen (fuse_linker_plugin), 0)) 6889 #endif 6890 { 6891 linker_plugin_file_spec = find_a_file (&exec_prefixes, 6892 LTOPLUGINSONAME, R_OK, 6893 false); 6894 if (!linker_plugin_file_spec) 6895 fatal_error ("-fuse-linker-plugin, but %s not found", 6896 LTOPLUGINSONAME); 6897 } 6898 #endif 6899 lto_gcc_spec = argv[0]; 6900 } 6901 6902 /* Rebuild the COMPILER_PATH and LIBRARY_PATH environment variables 6903 for collect. */ 6904 putenv_from_prefixes (&exec_prefixes, "COMPILER_PATH", false); 6905 putenv_from_prefixes (&startfile_prefixes, LIBRARY_PATH_ENV, true); 6906 6907 if (print_subprocess_help == 1) 6908 { 6909 printf (_("\nLinker options\n==============\n\n")); 6910 printf (_("Use \"-Wl,OPTION\" to pass \"OPTION\"" 6911 " to the linker.\n\n")); 6912 fflush (stdout); 6913 } 6914 value = do_spec (link_command_spec); 6915 if (value < 0) 6916 errorcount = 1; 6917 linker_was_run = (tmp != execution_count); 6918 } 6919 6920 /* If options said don't run linker, 6921 complain about input files to be given to the linker. */ 6922 6923 if (! linker_was_run && !seen_error ()) 6924 for (i = 0; (int) i < n_infiles; i++) 6925 if (explicit_link_files[i] 6926 && !(infiles[i].language && infiles[i].language[0] == '*')) 6927 warning (0, "%s: linker input file unused because linking not done", 6928 outfiles[i]); 6929 6930 /* Delete some or all of the temporary files we made. */ 6931 6932 if (seen_error ()) 6933 delete_failure_queue (); 6934 delete_temp_files (); 6935 6936 if (print_help_list) 6937 { 6938 printf (("\nFor bug reporting instructions, please see:\n")); 6939 printf ("%s\n", bug_report_url); 6940 } 6941 6942 out: 6943 return (signal_count != 0 ? 2 6944 : seen_error () ? (pass_exit_codes ? greatest_status : 1) 6945 : 0); 6946 } 6947 6948 /* Find the proper compilation spec for the file name NAME, 6949 whose length is LENGTH. LANGUAGE is the specified language, 6950 or 0 if this file is to be passed to the linker. */ 6951 6952 static struct compiler * 6953 lookup_compiler (const char *name, size_t length, const char *language) 6954 { 6955 struct compiler *cp; 6956 6957 /* If this was specified by the user to be a linker input, indicate that. */ 6958 if (language != 0 && language[0] == '*') 6959 return 0; 6960 6961 /* Otherwise, look for the language, if one is spec'd. */ 6962 if (language != 0) 6963 { 6964 for (cp = compilers + n_compilers - 1; cp >= compilers; cp--) 6965 if (cp->suffix[0] == '@' && !strcmp (cp->suffix + 1, language)) 6966 return cp; 6967 6968 error ("language %s not recognized", language); 6969 return 0; 6970 } 6971 6972 /* Look for a suffix. */ 6973 for (cp = compilers + n_compilers - 1; cp >= compilers; cp--) 6974 { 6975 if (/* The suffix `-' matches only the file name `-'. */ 6976 (!strcmp (cp->suffix, "-") && !strcmp (name, "-")) 6977 || (strlen (cp->suffix) < length 6978 /* See if the suffix matches the end of NAME. */ 6979 && !strcmp (cp->suffix, 6980 name + length - strlen (cp->suffix)) 6981 )) 6982 break; 6983 } 6984 6985 #if defined (OS2) ||defined (HAVE_DOS_BASED_FILE_SYSTEM) 6986 /* Look again, but case-insensitively this time. */ 6987 if (cp < compilers) 6988 for (cp = compilers + n_compilers - 1; cp >= compilers; cp--) 6989 { 6990 if (/* The suffix `-' matches only the file name `-'. */ 6991 (!strcmp (cp->suffix, "-") && !strcmp (name, "-")) 6992 || (strlen (cp->suffix) < length 6993 /* See if the suffix matches the end of NAME. */ 6994 && ((!strcmp (cp->suffix, 6995 name + length - strlen (cp->suffix)) 6996 || !strpbrk (cp->suffix, "ABCDEFGHIJKLMNOPQRSTUVWXYZ")) 6997 && !strcasecmp (cp->suffix, 6998 name + length - strlen (cp->suffix))) 6999 )) 7000 break; 7001 } 7002 #endif 7003 7004 if (cp >= compilers) 7005 { 7006 if (cp->spec[0] != '@') 7007 /* A non-alias entry: return it. */ 7008 return cp; 7009 7010 /* An alias entry maps a suffix to a language. 7011 Search for the language; pass 0 for NAME and LENGTH 7012 to avoid infinite recursion if language not found. */ 7013 return lookup_compiler (NULL, 0, cp->spec + 1); 7014 } 7015 return 0; 7016 } 7017 7018 static char * 7019 save_string (const char *s, int len) 7020 { 7021 char *result = XNEWVEC (char, len + 1); 7022 7023 memcpy (result, s, len); 7024 result[len] = 0; 7025 return result; 7026 } 7027 7028 void 7029 pfatal_with_name (const char *name) 7030 { 7031 perror_with_name (name); 7032 delete_temp_files (); 7033 exit (1); 7034 } 7035 7036 static void 7037 perror_with_name (const char *name) 7038 { 7039 error ("%s: %m", name); 7040 } 7041 7042 static inline void 7043 validate_switches_from_spec (const char *spec) 7044 { 7045 const char *p = spec; 7046 char c; 7047 while ((c = *p++)) 7048 if (c == '%' && (*p == '{' || *p == '<' || (*p == 'W' && *++p == '{'))) 7049 /* We have a switch spec. */ 7050 p = validate_switches (p + 1); 7051 } 7052 7053 static void 7054 validate_all_switches (void) 7055 { 7056 struct compiler *comp; 7057 struct spec_list *spec; 7058 7059 for (comp = compilers; comp->spec; comp++) 7060 validate_switches_from_spec (comp->spec); 7061 7062 /* Look through the linked list of specs read from the specs file. */ 7063 for (spec = specs; spec; spec = spec->next) 7064 validate_switches_from_spec (*spec->ptr_spec); 7065 7066 validate_switches_from_spec (link_command_spec); 7067 } 7068 7069 /* Look at the switch-name that comes after START 7070 and mark as valid all supplied switches that match it. */ 7071 7072 static const char * 7073 validate_switches (const char *start) 7074 { 7075 const char *p = start; 7076 const char *atom; 7077 size_t len; 7078 int i; 7079 bool suffix = false; 7080 bool starred = false; 7081 7082 #define SKIP_WHITE() do { while (*p == ' ' || *p == '\t') p++; } while (0) 7083 7084 next_member: 7085 SKIP_WHITE (); 7086 7087 if (*p == '!') 7088 p++; 7089 7090 SKIP_WHITE (); 7091 if (*p == '.' || *p == ',') 7092 suffix = true, p++; 7093 7094 atom = p; 7095 while (ISIDNUM (*p) || *p == '-' || *p == '+' || *p == '=' 7096 || *p == ',' || *p == '.' || *p == '@') 7097 p++; 7098 len = p - atom; 7099 7100 if (*p == '*') 7101 starred = true, p++; 7102 7103 SKIP_WHITE (); 7104 7105 if (!suffix) 7106 { 7107 /* Mark all matching switches as valid. */ 7108 for (i = 0; i < n_switches; i++) 7109 if (!strncmp (switches[i].part1, atom, len) 7110 && (starred || switches[i].part1[len] == 0)) 7111 switches[i].validated = 1; 7112 } 7113 7114 if (*p) p++; 7115 if (*p && (p[-1] == '|' || p[-1] == '&')) 7116 goto next_member; 7117 7118 if (*p && p[-1] == ':') 7119 { 7120 while (*p && *p != ';' && *p != '}') 7121 { 7122 if (*p == '%') 7123 { 7124 p++; 7125 if (*p == '{' || *p == '<') 7126 p = validate_switches (p+1); 7127 else if (p[0] == 'W' && p[1] == '{') 7128 p = validate_switches (p+2); 7129 } 7130 else 7131 p++; 7132 } 7133 7134 if (*p) p++; 7135 if (*p && p[-1] == ';') 7136 goto next_member; 7137 } 7138 7139 return p; 7140 #undef SKIP_WHITE 7141 } 7142 7143 struct mdswitchstr 7144 { 7145 const char *str; 7146 int len; 7147 }; 7148 7149 static struct mdswitchstr *mdswitches; 7150 static int n_mdswitches; 7151 7152 /* Check whether a particular argument was used. The first time we 7153 canonicalize the switches to keep only the ones we care about. */ 7154 7155 static int 7156 used_arg (const char *p, int len) 7157 { 7158 struct mswitchstr 7159 { 7160 const char *str; 7161 const char *replace; 7162 int len; 7163 int rep_len; 7164 }; 7165 7166 static struct mswitchstr *mswitches; 7167 static int n_mswitches; 7168 int i, j; 7169 7170 if (!mswitches) 7171 { 7172 struct mswitchstr *matches; 7173 const char *q; 7174 int cnt = 0; 7175 7176 /* Break multilib_matches into the component strings of string 7177 and replacement string. */ 7178 for (q = multilib_matches; *q != '\0'; q++) 7179 if (*q == ';') 7180 cnt++; 7181 7182 matches 7183 = (struct mswitchstr *) alloca ((sizeof (struct mswitchstr)) * cnt); 7184 i = 0; 7185 q = multilib_matches; 7186 while (*q != '\0') 7187 { 7188 matches[i].str = q; 7189 while (*q != ' ') 7190 { 7191 if (*q == '\0') 7192 { 7193 invalid_matches: 7194 fatal_error ("multilib spec %qs is invalid", 7195 multilib_matches); 7196 } 7197 q++; 7198 } 7199 matches[i].len = q - matches[i].str; 7200 7201 matches[i].replace = ++q; 7202 while (*q != ';' && *q != '\0') 7203 { 7204 if (*q == ' ') 7205 goto invalid_matches; 7206 q++; 7207 } 7208 matches[i].rep_len = q - matches[i].replace; 7209 i++; 7210 if (*q == ';') 7211 q++; 7212 } 7213 7214 /* Now build a list of the replacement string for switches that we care 7215 about. Make sure we allocate at least one entry. This prevents 7216 xmalloc from calling fatal, and prevents us from re-executing this 7217 block of code. */ 7218 mswitches 7219 = XNEWVEC (struct mswitchstr, n_mdswitches + (n_switches ? n_switches : 1)); 7220 for (i = 0; i < n_switches; i++) 7221 if ((switches[i].live_cond & SWITCH_IGNORE) == 0) 7222 { 7223 int xlen = strlen (switches[i].part1); 7224 for (j = 0; j < cnt; j++) 7225 if (xlen == matches[j].len 7226 && ! strncmp (switches[i].part1, matches[j].str, xlen)) 7227 { 7228 mswitches[n_mswitches].str = matches[j].replace; 7229 mswitches[n_mswitches].len = matches[j].rep_len; 7230 mswitches[n_mswitches].replace = (char *) 0; 7231 mswitches[n_mswitches].rep_len = 0; 7232 n_mswitches++; 7233 break; 7234 } 7235 } 7236 7237 /* Add MULTILIB_DEFAULTS switches too, as long as they were not present 7238 on the command line nor any options mutually incompatible with 7239 them. */ 7240 for (i = 0; i < n_mdswitches; i++) 7241 { 7242 const char *r; 7243 7244 for (q = multilib_options; *q != '\0'; q++) 7245 { 7246 while (*q == ' ') 7247 q++; 7248 7249 r = q; 7250 while (strncmp (q, mdswitches[i].str, mdswitches[i].len) != 0 7251 || strchr (" /", q[mdswitches[i].len]) == NULL) 7252 { 7253 while (*q != ' ' && *q != '/' && *q != '\0') 7254 q++; 7255 if (*q != '/') 7256 break; 7257 q++; 7258 } 7259 7260 if (*q != ' ' && *q != '\0') 7261 { 7262 while (*r != ' ' && *r != '\0') 7263 { 7264 q = r; 7265 while (*q != ' ' && *q != '/' && *q != '\0') 7266 q++; 7267 7268 if (used_arg (r, q - r)) 7269 break; 7270 7271 if (*q != '/') 7272 { 7273 mswitches[n_mswitches].str = mdswitches[i].str; 7274 mswitches[n_mswitches].len = mdswitches[i].len; 7275 mswitches[n_mswitches].replace = (char *) 0; 7276 mswitches[n_mswitches].rep_len = 0; 7277 n_mswitches++; 7278 break; 7279 } 7280 7281 r = q + 1; 7282 } 7283 break; 7284 } 7285 } 7286 } 7287 } 7288 7289 for (i = 0; i < n_mswitches; i++) 7290 if (len == mswitches[i].len && ! strncmp (p, mswitches[i].str, len)) 7291 return 1; 7292 7293 return 0; 7294 } 7295 7296 static int 7297 default_arg (const char *p, int len) 7298 { 7299 int i; 7300 7301 for (i = 0; i < n_mdswitches; i++) 7302 if (len == mdswitches[i].len && ! strncmp (p, mdswitches[i].str, len)) 7303 return 1; 7304 7305 return 0; 7306 } 7307 7308 /* Work out the subdirectory to use based on the options. The format of 7309 multilib_select is a list of elements. Each element is a subdirectory 7310 name followed by a list of options followed by a semicolon. The format 7311 of multilib_exclusions is the same, but without the preceding 7312 directory. First gcc will check the exclusions, if none of the options 7313 beginning with an exclamation point are present, and all of the other 7314 options are present, then we will ignore this completely. Passing 7315 that, gcc will consider each multilib_select in turn using the same 7316 rules for matching the options. If a match is found, that subdirectory 7317 will be used. */ 7318 7319 static void 7320 set_multilib_dir (void) 7321 { 7322 const char *p; 7323 unsigned int this_path_len; 7324 const char *this_path, *this_arg; 7325 const char *start, *end; 7326 int not_arg; 7327 int ok, ndfltok, first; 7328 7329 n_mdswitches = 0; 7330 start = multilib_defaults; 7331 while (*start == ' ' || *start == '\t') 7332 start++; 7333 while (*start != '\0') 7334 { 7335 n_mdswitches++; 7336 while (*start != ' ' && *start != '\t' && *start != '\0') 7337 start++; 7338 while (*start == ' ' || *start == '\t') 7339 start++; 7340 } 7341 7342 if (n_mdswitches) 7343 { 7344 int i = 0; 7345 7346 mdswitches = XNEWVEC (struct mdswitchstr, n_mdswitches); 7347 for (start = multilib_defaults; *start != '\0'; start = end + 1) 7348 { 7349 while (*start == ' ' || *start == '\t') 7350 start++; 7351 7352 if (*start == '\0') 7353 break; 7354 7355 for (end = start + 1; 7356 *end != ' ' && *end != '\t' && *end != '\0'; end++) 7357 ; 7358 7359 obstack_grow (&multilib_obstack, start, end - start); 7360 obstack_1grow (&multilib_obstack, 0); 7361 mdswitches[i].str = XOBFINISH (&multilib_obstack, const char *); 7362 mdswitches[i++].len = end - start; 7363 7364 if (*end == '\0') 7365 break; 7366 } 7367 } 7368 7369 p = multilib_exclusions; 7370 while (*p != '\0') 7371 { 7372 /* Ignore newlines. */ 7373 if (*p == '\n') 7374 { 7375 ++p; 7376 continue; 7377 } 7378 7379 /* Check the arguments. */ 7380 ok = 1; 7381 while (*p != ';') 7382 { 7383 if (*p == '\0') 7384 { 7385 invalid_exclusions: 7386 fatal_error ("multilib exclusions %qs is invalid", 7387 multilib_exclusions); 7388 } 7389 7390 if (! ok) 7391 { 7392 ++p; 7393 continue; 7394 } 7395 7396 this_arg = p; 7397 while (*p != ' ' && *p != ';') 7398 { 7399 if (*p == '\0') 7400 goto invalid_exclusions; 7401 ++p; 7402 } 7403 7404 if (*this_arg != '!') 7405 not_arg = 0; 7406 else 7407 { 7408 not_arg = 1; 7409 ++this_arg; 7410 } 7411 7412 ok = used_arg (this_arg, p - this_arg); 7413 if (not_arg) 7414 ok = ! ok; 7415 7416 if (*p == ' ') 7417 ++p; 7418 } 7419 7420 if (ok) 7421 return; 7422 7423 ++p; 7424 } 7425 7426 first = 1; 7427 p = multilib_select; 7428 while (*p != '\0') 7429 { 7430 /* Ignore newlines. */ 7431 if (*p == '\n') 7432 { 7433 ++p; 7434 continue; 7435 } 7436 7437 /* Get the initial path. */ 7438 this_path = p; 7439 while (*p != ' ') 7440 { 7441 if (*p == '\0') 7442 { 7443 invalid_select: 7444 fatal_error ("multilib select %qs is invalid", 7445 multilib_select); 7446 } 7447 ++p; 7448 } 7449 this_path_len = p - this_path; 7450 7451 /* Check the arguments. */ 7452 ok = 1; 7453 ndfltok = 1; 7454 ++p; 7455 while (*p != ';') 7456 { 7457 if (*p == '\0') 7458 goto invalid_select; 7459 7460 if (! ok) 7461 { 7462 ++p; 7463 continue; 7464 } 7465 7466 this_arg = p; 7467 while (*p != ' ' && *p != ';') 7468 { 7469 if (*p == '\0') 7470 goto invalid_select; 7471 ++p; 7472 } 7473 7474 if (*this_arg != '!') 7475 not_arg = 0; 7476 else 7477 { 7478 not_arg = 1; 7479 ++this_arg; 7480 } 7481 7482 /* If this is a default argument, we can just ignore it. 7483 This is true even if this_arg begins with '!'. Beginning 7484 with '!' does not mean that this argument is necessarily 7485 inappropriate for this library: it merely means that 7486 there is a more specific library which uses this 7487 argument. If this argument is a default, we need not 7488 consider that more specific library. */ 7489 ok = used_arg (this_arg, p - this_arg); 7490 if (not_arg) 7491 ok = ! ok; 7492 7493 if (! ok) 7494 ndfltok = 0; 7495 7496 if (default_arg (this_arg, p - this_arg)) 7497 ok = 1; 7498 7499 if (*p == ' ') 7500 ++p; 7501 } 7502 7503 if (ok && first) 7504 { 7505 if (this_path_len != 1 7506 || this_path[0] != '.') 7507 { 7508 char *new_multilib_dir = XNEWVEC (char, this_path_len + 1); 7509 char *q; 7510 7511 strncpy (new_multilib_dir, this_path, this_path_len); 7512 new_multilib_dir[this_path_len] = '\0'; 7513 q = strchr (new_multilib_dir, ':'); 7514 if (q != NULL) 7515 *q = '\0'; 7516 multilib_dir = new_multilib_dir; 7517 } 7518 first = 0; 7519 } 7520 7521 if (ndfltok) 7522 { 7523 const char *q = this_path, *end = this_path + this_path_len; 7524 7525 while (q < end && *q != ':') 7526 q++; 7527 if (q < end) 7528 { 7529 char *new_multilib_os_dir = XNEWVEC (char, end - q); 7530 memcpy (new_multilib_os_dir, q + 1, end - q - 1); 7531 new_multilib_os_dir[end - q - 1] = '\0'; 7532 multilib_os_dir = new_multilib_os_dir; 7533 break; 7534 } 7535 } 7536 7537 ++p; 7538 } 7539 7540 if (multilib_dir == NULL && multilib_os_dir != NULL 7541 && strcmp (multilib_os_dir, ".") == 0) 7542 { 7543 free (CONST_CAST (char *, multilib_os_dir)); 7544 multilib_os_dir = NULL; 7545 } 7546 else if (multilib_dir != NULL && multilib_os_dir == NULL) 7547 multilib_os_dir = multilib_dir; 7548 } 7549 7550 /* Print out the multiple library subdirectory selection 7551 information. This prints out a series of lines. Each line looks 7552 like SUBDIRECTORY;@OPTION@OPTION, with as many options as is 7553 required. Only the desired options are printed out, the negative 7554 matches. The options are print without a leading dash. There are 7555 no spaces to make it easy to use the information in the shell. 7556 Each subdirectory is printed only once. This assumes the ordering 7557 generated by the genmultilib script. Also, we leave out ones that match 7558 the exclusions. */ 7559 7560 static void 7561 print_multilib_info (void) 7562 { 7563 const char *p = multilib_select; 7564 const char *last_path = 0, *this_path; 7565 int skip; 7566 unsigned int last_path_len = 0; 7567 7568 while (*p != '\0') 7569 { 7570 skip = 0; 7571 /* Ignore newlines. */ 7572 if (*p == '\n') 7573 { 7574 ++p; 7575 continue; 7576 } 7577 7578 /* Get the initial path. */ 7579 this_path = p; 7580 while (*p != ' ') 7581 { 7582 if (*p == '\0') 7583 { 7584 invalid_select: 7585 fatal_error ("multilib select %qs is invalid", multilib_select); 7586 } 7587 7588 ++p; 7589 } 7590 7591 /* When --disable-multilib was used but target defines 7592 MULTILIB_OSDIRNAMES, entries starting with .: are there just 7593 to find multilib_os_dir, so skip them from output. */ 7594 if (this_path[0] == '.' && this_path[1] == ':') 7595 skip = 1; 7596 7597 /* Check for matches with the multilib_exclusions. We don't bother 7598 with the '!' in either list. If any of the exclusion rules match 7599 all of its options with the select rule, we skip it. */ 7600 { 7601 const char *e = multilib_exclusions; 7602 const char *this_arg; 7603 7604 while (*e != '\0') 7605 { 7606 int m = 1; 7607 /* Ignore newlines. */ 7608 if (*e == '\n') 7609 { 7610 ++e; 7611 continue; 7612 } 7613 7614 /* Check the arguments. */ 7615 while (*e != ';') 7616 { 7617 const char *q; 7618 int mp = 0; 7619 7620 if (*e == '\0') 7621 { 7622 invalid_exclusion: 7623 fatal_error ("multilib exclusion %qs is invalid", 7624 multilib_exclusions); 7625 } 7626 7627 if (! m) 7628 { 7629 ++e; 7630 continue; 7631 } 7632 7633 this_arg = e; 7634 7635 while (*e != ' ' && *e != ';') 7636 { 7637 if (*e == '\0') 7638 goto invalid_exclusion; 7639 ++e; 7640 } 7641 7642 q = p + 1; 7643 while (*q != ';') 7644 { 7645 const char *arg; 7646 int len = e - this_arg; 7647 7648 if (*q == '\0') 7649 goto invalid_select; 7650 7651 arg = q; 7652 7653 while (*q != ' ' && *q != ';') 7654 { 7655 if (*q == '\0') 7656 goto invalid_select; 7657 ++q; 7658 } 7659 7660 if (! strncmp (arg, this_arg, 7661 (len < q - arg) ? q - arg : len) 7662 || default_arg (this_arg, e - this_arg)) 7663 { 7664 mp = 1; 7665 break; 7666 } 7667 7668 if (*q == ' ') 7669 ++q; 7670 } 7671 7672 if (! mp) 7673 m = 0; 7674 7675 if (*e == ' ') 7676 ++e; 7677 } 7678 7679 if (m) 7680 { 7681 skip = 1; 7682 break; 7683 } 7684 7685 if (*e != '\0') 7686 ++e; 7687 } 7688 } 7689 7690 if (! skip) 7691 { 7692 /* If this is a duplicate, skip it. */ 7693 skip = (last_path != 0 7694 && (unsigned int) (p - this_path) == last_path_len 7695 && ! filename_ncmp (last_path, this_path, last_path_len)); 7696 7697 last_path = this_path; 7698 last_path_len = p - this_path; 7699 } 7700 7701 /* If this directory requires any default arguments, we can skip 7702 it. We will already have printed a directory identical to 7703 this one which does not require that default argument. */ 7704 if (! skip) 7705 { 7706 const char *q; 7707 7708 q = p + 1; 7709 while (*q != ';') 7710 { 7711 const char *arg; 7712 7713 if (*q == '\0') 7714 goto invalid_select; 7715 7716 if (*q == '!') 7717 arg = NULL; 7718 else 7719 arg = q; 7720 7721 while (*q != ' ' && *q != ';') 7722 { 7723 if (*q == '\0') 7724 goto invalid_select; 7725 ++q; 7726 } 7727 7728 if (arg != NULL 7729 && default_arg (arg, q - arg)) 7730 { 7731 skip = 1; 7732 break; 7733 } 7734 7735 if (*q == ' ') 7736 ++q; 7737 } 7738 } 7739 7740 if (! skip) 7741 { 7742 const char *p1; 7743 7744 for (p1 = last_path; p1 < p && *p1 != ':'; p1++) 7745 putchar (*p1); 7746 putchar (';'); 7747 } 7748 7749 ++p; 7750 while (*p != ';') 7751 { 7752 int use_arg; 7753 7754 if (*p == '\0') 7755 goto invalid_select; 7756 7757 if (skip) 7758 { 7759 ++p; 7760 continue; 7761 } 7762 7763 use_arg = *p != '!'; 7764 7765 if (use_arg) 7766 putchar ('@'); 7767 7768 while (*p != ' ' && *p != ';') 7769 { 7770 if (*p == '\0') 7771 goto invalid_select; 7772 if (use_arg) 7773 putchar (*p); 7774 ++p; 7775 } 7776 7777 if (*p == ' ') 7778 ++p; 7779 } 7780 7781 if (! skip) 7782 { 7783 /* If there are extra options, print them now. */ 7784 if (multilib_extra && *multilib_extra) 7785 { 7786 int print_at = TRUE; 7787 const char *q; 7788 7789 for (q = multilib_extra; *q != '\0'; q++) 7790 { 7791 if (*q == ' ') 7792 print_at = TRUE; 7793 else 7794 { 7795 if (print_at) 7796 putchar ('@'); 7797 putchar (*q); 7798 print_at = FALSE; 7799 } 7800 } 7801 } 7802 7803 putchar ('\n'); 7804 } 7805 7806 ++p; 7807 } 7808 } 7809 7810 /* getenv built-in spec function. 7811 7812 Returns the value of the environment variable given by its first 7813 argument, concatenated with the second argument. If the 7814 environment variable is not defined, a fatal error is issued. */ 7815 7816 static const char * 7817 getenv_spec_function (int argc, const char **argv) 7818 { 7819 char *value; 7820 char *result; 7821 char *ptr; 7822 size_t len; 7823 7824 if (argc != 2) 7825 return NULL; 7826 7827 value = getenv (argv[0]); 7828 if (!value) 7829 fatal_error ("environment variable %qs not defined", argv[0]); 7830 7831 /* We have to escape every character of the environment variable so 7832 they are not interpreted as active spec characters. A 7833 particularly painful case is when we are reading a variable 7834 holding a windows path complete with \ separators. */ 7835 len = strlen (value) * 2 + strlen (argv[1]) + 1; 7836 result = XNEWVAR (char, len); 7837 for (ptr = result; *value; ptr += 2) 7838 { 7839 ptr[0] = '\\'; 7840 ptr[1] = *value++; 7841 } 7842 7843 strcpy (ptr, argv[1]); 7844 7845 return result; 7846 } 7847 7848 /* if-exists built-in spec function. 7849 7850 Checks to see if the file specified by the absolute pathname in 7851 ARGS exists. Returns that pathname if found. 7852 7853 The usual use for this function is to check for a library file 7854 (whose name has been expanded with %s). */ 7855 7856 static const char * 7857 if_exists_spec_function (int argc, const char **argv) 7858 { 7859 /* Must have only one argument. */ 7860 if (argc == 1 && IS_ABSOLUTE_PATH (argv[0]) && ! access (argv[0], R_OK)) 7861 return argv[0]; 7862 7863 return NULL; 7864 } 7865 7866 /* if-exists-else built-in spec function. 7867 7868 This is like if-exists, but takes an additional argument which 7869 is returned if the first argument does not exist. */ 7870 7871 static const char * 7872 if_exists_else_spec_function (int argc, const char **argv) 7873 { 7874 /* Must have exactly two arguments. */ 7875 if (argc != 2) 7876 return NULL; 7877 7878 if (IS_ABSOLUTE_PATH (argv[0]) && ! access (argv[0], R_OK)) 7879 return argv[0]; 7880 7881 return argv[1]; 7882 } 7883 7884 /* replace-outfile built-in spec function. 7885 7886 This looks for the first argument in the outfiles array's name and 7887 replaces it with the second argument. */ 7888 7889 static const char * 7890 replace_outfile_spec_function (int argc, const char **argv) 7891 { 7892 int i; 7893 /* Must have exactly two arguments. */ 7894 if (argc != 2) 7895 abort (); 7896 7897 for (i = 0; i < n_infiles; i++) 7898 { 7899 if (outfiles[i] && !filename_cmp (outfiles[i], argv[0])) 7900 outfiles[i] = xstrdup (argv[1]); 7901 } 7902 return NULL; 7903 } 7904 7905 /* remove-outfile built-in spec function. 7906 * 7907 * This looks for the first argument in the outfiles array's name and 7908 * removes it. */ 7909 7910 static const char * 7911 remove_outfile_spec_function (int argc, const char **argv) 7912 { 7913 int i; 7914 /* Must have exactly one argument. */ 7915 if (argc != 1) 7916 abort (); 7917 7918 for (i = 0; i < n_infiles; i++) 7919 { 7920 if (outfiles[i] && !filename_cmp (outfiles[i], argv[0])) 7921 outfiles[i] = NULL; 7922 } 7923 return NULL; 7924 } 7925 7926 /* Given two version numbers, compares the two numbers. 7927 A version number must match the regular expression 7928 ([1-9][0-9]*|0)(\.([1-9][0-9]*|0))* 7929 */ 7930 static int 7931 compare_version_strings (const char *v1, const char *v2) 7932 { 7933 int rresult; 7934 regex_t r; 7935 7936 if (regcomp (&r, "^([1-9][0-9]*|0)(\\.([1-9][0-9]*|0))*$", 7937 REG_EXTENDED | REG_NOSUB) != 0) 7938 abort (); 7939 rresult = regexec (&r, v1, 0, NULL, 0); 7940 if (rresult == REG_NOMATCH) 7941 fatal_error ("invalid version number %qs", v1); 7942 else if (rresult != 0) 7943 abort (); 7944 rresult = regexec (&r, v2, 0, NULL, 0); 7945 if (rresult == REG_NOMATCH) 7946 fatal_error ("invalid version number %qs", v2); 7947 else if (rresult != 0) 7948 abort (); 7949 7950 return strverscmp (v1, v2); 7951 } 7952 7953 7954 /* version_compare built-in spec function. 7955 7956 This takes an argument of the following form: 7957 7958 <comparison-op> <arg1> [<arg2>] <switch> <result> 7959 7960 and produces "result" if the comparison evaluates to true, 7961 and nothing if it doesn't. 7962 7963 The supported <comparison-op> values are: 7964 7965 >= true if switch is a later (or same) version than arg1 7966 !> opposite of >= 7967 < true if switch is an earlier version than arg1 7968 !< opposite of < 7969 >< true if switch is arg1 or later, and earlier than arg2 7970 <> true if switch is earlier than arg1 or is arg2 or later 7971 7972 If the switch is not present, the condition is false unless 7973 the first character of the <comparison-op> is '!'. 7974 7975 For example, 7976 %:version-compare(>= 10.3 mmacosx-version-min= -lmx) 7977 adds -lmx if -mmacosx-version-min=10.3.9 was passed. */ 7978 7979 static const char * 7980 version_compare_spec_function (int argc, const char **argv) 7981 { 7982 int comp1, comp2; 7983 size_t switch_len; 7984 const char *switch_value = NULL; 7985 int nargs = 1, i; 7986 bool result; 7987 7988 if (argc < 3) 7989 fatal_error ("too few arguments to %%:version-compare"); 7990 if (argv[0][0] == '\0') 7991 abort (); 7992 if ((argv[0][1] == '<' || argv[0][1] == '>') && argv[0][0] != '!') 7993 nargs = 2; 7994 if (argc != nargs + 3) 7995 fatal_error ("too many arguments to %%:version-compare"); 7996 7997 switch_len = strlen (argv[nargs + 1]); 7998 for (i = 0; i < n_switches; i++) 7999 if (!strncmp (switches[i].part1, argv[nargs + 1], switch_len) 8000 && check_live_switch (i, switch_len)) 8001 switch_value = switches[i].part1 + switch_len; 8002 8003 if (switch_value == NULL) 8004 comp1 = comp2 = -1; 8005 else 8006 { 8007 comp1 = compare_version_strings (switch_value, argv[1]); 8008 if (nargs == 2) 8009 comp2 = compare_version_strings (switch_value, argv[2]); 8010 else 8011 comp2 = -1; /* This value unused. */ 8012 } 8013 8014 switch (argv[0][0] << 8 | argv[0][1]) 8015 { 8016 case '>' << 8 | '=': 8017 result = comp1 >= 0; 8018 break; 8019 case '!' << 8 | '<': 8020 result = comp1 >= 0 || switch_value == NULL; 8021 break; 8022 case '<' << 8: 8023 result = comp1 < 0; 8024 break; 8025 case '!' << 8 | '>': 8026 result = comp1 < 0 || switch_value == NULL; 8027 break; 8028 case '>' << 8 | '<': 8029 result = comp1 >= 0 && comp2 < 0; 8030 break; 8031 case '<' << 8 | '>': 8032 result = comp1 < 0 || comp2 >= 0; 8033 break; 8034 8035 default: 8036 fatal_error ("unknown operator %qs in %%:version-compare", argv[0]); 8037 } 8038 if (! result) 8039 return NULL; 8040 8041 return argv[nargs + 2]; 8042 } 8043 8044 /* %:include builtin spec function. This differs from %include in that it 8045 can be nested inside a spec, and thus be conditionalized. It takes 8046 one argument, the filename, and looks for it in the startfile path. 8047 The result is always NULL, i.e. an empty expansion. */ 8048 8049 static const char * 8050 include_spec_function (int argc, const char **argv) 8051 { 8052 char *file; 8053 8054 if (argc != 1) 8055 abort (); 8056 8057 file = find_a_file (&startfile_prefixes, argv[0], R_OK, true); 8058 read_specs (file ? file : argv[0], FALSE); 8059 8060 return NULL; 8061 } 8062 8063 /* %:find-file spec function. This function replaces its argument by 8064 the file found thru find_file, that is the -print-file-name gcc 8065 program option. */ 8066 static const char * 8067 find_file_spec_function (int argc, const char **argv) 8068 { 8069 const char *file; 8070 8071 if (argc != 1) 8072 abort (); 8073 8074 file = find_file (argv[0]); 8075 return file; 8076 } 8077 8078 8079 /* %:find-plugindir spec function. This function replaces its argument 8080 by the -iplugindir=<dir> option. `dir' is found thru find_file, that 8081 is the -print-file-name gcc program option. */ 8082 static const char * 8083 find_plugindir_spec_function (int argc, const char **argv ATTRIBUTE_UNUSED) 8084 { 8085 const char *option; 8086 8087 if (argc != 0) 8088 abort (); 8089 8090 option = concat ("-iplugindir=", find_file ("plugin"), NULL); 8091 return option; 8092 } 8093 8094 8095 /* %:print-asm-header spec function. Print a banner to say that the 8096 following output is from the assembler. */ 8097 8098 static const char * 8099 print_asm_header_spec_function (int arg ATTRIBUTE_UNUSED, 8100 const char **argv ATTRIBUTE_UNUSED) 8101 { 8102 printf (_("Assembler options\n=================\n\n")); 8103 printf (_("Use \"-Wa,OPTION\" to pass \"OPTION\" to the assembler.\n\n")); 8104 fflush (stdout); 8105 return NULL; 8106 } 8107 8108 /* Get a random number for -frandom-seed */ 8109 8110 static unsigned HOST_WIDE_INT 8111 get_random_number (void) 8112 { 8113 unsigned HOST_WIDE_INT ret = 0; 8114 int fd; 8115 8116 fd = open ("/dev/urandom", O_RDONLY); 8117 if (fd >= 0) 8118 { 8119 read (fd, &ret, sizeof (HOST_WIDE_INT)); 8120 close (fd); 8121 if (ret) 8122 return ret; 8123 } 8124 8125 /* Get some more or less random data. */ 8126 #ifdef HAVE_GETTIMEOFDAY 8127 { 8128 struct timeval tv; 8129 8130 gettimeofday (&tv, NULL); 8131 ret = tv.tv_sec * 1000 + tv.tv_usec / 1000; 8132 } 8133 #else 8134 { 8135 time_t now = time (NULL); 8136 8137 if (now != (time_t)-1) 8138 ret = (unsigned) now; 8139 } 8140 #endif 8141 8142 return ret ^ getpid(); 8143 } 8144 8145 /* %:compare-debug-dump-opt spec function. Save the last argument, 8146 expected to be the last -fdump-final-insns option, or generate a 8147 temporary. */ 8148 8149 static const char * 8150 compare_debug_dump_opt_spec_function (int arg, 8151 const char **argv ATTRIBUTE_UNUSED) 8152 { 8153 const char *ret; 8154 char *name; 8155 int which; 8156 static char random_seed[HOST_BITS_PER_WIDE_INT / 4 + 3]; 8157 8158 if (arg != 0) 8159 fatal_error ("too many arguments to %%:compare-debug-dump-opt"); 8160 8161 do_spec_2 ("%{fdump-final-insns=*:%*}"); 8162 do_spec_1 (" ", 0, NULL); 8163 8164 if (VEC_length (const_char_p, argbuf) > 0 8165 && strcmp (argv[VEC_length (const_char_p, argbuf) - 1], ".")) 8166 { 8167 if (!compare_debug) 8168 return NULL; 8169 8170 name = xstrdup (argv[VEC_length (const_char_p, argbuf) - 1]); 8171 ret = NULL; 8172 } 8173 else 8174 { 8175 const char *ext = NULL; 8176 8177 if (VEC_length (const_char_p, argbuf) > 0) 8178 { 8179 do_spec_2 ("%{o*:%*}%{!o:%{!S:%b%O}%{S:%b.s}}"); 8180 ext = ".gkd"; 8181 } 8182 else if (!compare_debug) 8183 return NULL; 8184 else 8185 do_spec_2 ("%g.gkd"); 8186 8187 do_spec_1 (" ", 0, NULL); 8188 8189 gcc_assert (VEC_length (const_char_p, argbuf) > 0); 8190 8191 name = concat (VEC_last (const_char_p, argbuf), ext, NULL); 8192 8193 ret = concat ("-fdump-final-insns=", name, NULL); 8194 } 8195 8196 which = compare_debug < 0; 8197 debug_check_temp_file[which] = name; 8198 8199 if (!which) 8200 { 8201 unsigned HOST_WIDE_INT value = get_random_number (); 8202 8203 sprintf (random_seed, HOST_WIDE_INT_PRINT_HEX, value); 8204 } 8205 8206 if (*random_seed) 8207 ret = concat ("%{!frandom-seed=*:-frandom-seed=", random_seed, "} ", 8208 ret, NULL); 8209 8210 if (which) 8211 *random_seed = 0; 8212 8213 return ret; 8214 } 8215 8216 static const char *debug_auxbase_opt; 8217 8218 /* %:compare-debug-self-opt spec function. Expands to the options 8219 that are to be passed in the second compilation of 8220 compare-debug. */ 8221 8222 static const char * 8223 compare_debug_self_opt_spec_function (int arg, 8224 const char **argv ATTRIBUTE_UNUSED) 8225 { 8226 if (arg != 0) 8227 fatal_error ("too many arguments to %%:compare-debug-self-opt"); 8228 8229 if (compare_debug >= 0) 8230 return NULL; 8231 8232 do_spec_2 ("%{c|S:%{o*:%*}}"); 8233 do_spec_1 (" ", 0, NULL); 8234 8235 if (VEC_length (const_char_p, argbuf) > 0) 8236 debug_auxbase_opt = concat ("-auxbase-strip ", 8237 VEC_last (const_char_p, argbuf), 8238 NULL); 8239 else 8240 debug_auxbase_opt = NULL; 8241 8242 return concat ("\ 8243 %<o %<MD %<MMD %<MF* %<MG %<MP %<MQ* %<MT* \ 8244 %<fdump-final-insns=* -w -S -o %j \ 8245 %{!fcompare-debug-second:-fcompare-debug-second} \ 8246 ", compare_debug_opt, NULL); 8247 } 8248 8249 /* %:compare-debug-auxbase-opt spec function. Expands to the auxbase 8250 options that are to be passed in the second compilation of 8251 compare-debug. It expects, as an argument, the basename of the 8252 current input file name, with the .gk suffix appended to it. */ 8253 8254 static const char * 8255 compare_debug_auxbase_opt_spec_function (int arg, 8256 const char **argv) 8257 { 8258 char *name; 8259 int len; 8260 8261 if (arg == 0) 8262 fatal_error ("too few arguments to %%:compare-debug-auxbase-opt"); 8263 8264 if (arg != 1) 8265 fatal_error ("too many arguments to %%:compare-debug-auxbase-opt"); 8266 8267 if (compare_debug >= 0) 8268 return NULL; 8269 8270 len = strlen (argv[0]); 8271 if (len < 3 || strcmp (argv[0] + len - 3, ".gk") != 0) 8272 fatal_error ("argument to %%:compare-debug-auxbase-opt " 8273 "does not end in .gk"); 8274 8275 if (debug_auxbase_opt) 8276 return debug_auxbase_opt; 8277 8278 #define OPT "-auxbase " 8279 8280 len -= 3; 8281 name = (char*) xmalloc (sizeof (OPT) + len); 8282 memcpy (name, OPT, sizeof (OPT) - 1); 8283 memcpy (name + sizeof (OPT) - 1, argv[0], len); 8284 name[sizeof (OPT) - 1 + len] = '\0'; 8285 8286 #undef OPT 8287 8288 return name; 8289 } 8290 8291 /* %:pass-through-libs spec function. Finds all -l options and input 8292 file names in the lib spec passed to it, and makes a list of them 8293 prepended with the plugin option to cause them to be passed through 8294 to the final link after all the new object files have been added. */ 8295 8296 const char * 8297 pass_through_libs_spec_func (int argc, const char **argv) 8298 { 8299 char *prepended = xstrdup (" "); 8300 int n; 8301 /* Shlemiel the painter's algorithm. Innately horrible, but at least 8302 we know that there will never be more than a handful of strings to 8303 concat, and it's only once per run, so it's not worth optimising. */ 8304 for (n = 0; n < argc; n++) 8305 { 8306 char *old = prepended; 8307 /* Anything that isn't an option is a full path to an output 8308 file; pass it through if it ends in '.a'. Among options, 8309 pass only -l. */ 8310 if (argv[n][0] == '-' && argv[n][1] == 'l') 8311 { 8312 const char *lopt = argv[n] + 2; 8313 /* Handle both joined and non-joined -l options. If for any 8314 reason there's a trailing -l with no joined or following 8315 arg just discard it. */ 8316 if (!*lopt && ++n >= argc) 8317 break; 8318 else if (!*lopt) 8319 lopt = argv[n]; 8320 prepended = concat (prepended, "-plugin-opt=-pass-through=-l", 8321 lopt, " ", NULL); 8322 } 8323 else if (!strcmp (".a", argv[n] + strlen (argv[n]) - 2)) 8324 { 8325 prepended = concat (prepended, "-plugin-opt=-pass-through=", 8326 argv[n], " ", NULL); 8327 } 8328 if (prepended != old) 8329 free (old); 8330 } 8331 return prepended; 8332 } 8333