1 /* Miscellaneous global declarations and portability cruft for GNU Make. 2 Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 3 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 Free Software 4 Foundation, Inc. 5 This file is part of GNU Make. 6 7 GNU Make is free software; you can redistribute it and/or modify it under the 8 terms of the GNU General Public License as published by the Free Software 9 Foundation; either version 2, or (at your option) any later version. 10 11 GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY 12 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR 13 A PARTICULAR PURPOSE. See the GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License along with 16 GNU Make; see the file COPYING. If not, write to the Free Software 17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. */ 18 19 /* We use <config.h> instead of "config.h" so that a compilation 20 using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h 21 (which it would do because make.h was found in $srcdir). */ 22 #include <config.h> 23 #undef HAVE_CONFIG_H 24 #define HAVE_CONFIG_H 1 25 26 /* AIX requires this to be the first thing in the file. */ 27 #ifndef __GNUC__ 28 # if HAVE_ALLOCA_H 29 # include <alloca.h> 30 # else 31 # ifdef _AIX 32 #pragma alloca 33 # else 34 # ifndef alloca /* predefined by HP cc +Olibcalls */ 35 char *alloca (); 36 # endif 37 # endif 38 # endif 39 #endif 40 41 42 /* Use prototypes if available. */ 43 #if defined (__cplusplus) || defined (__STDC__) 44 # undef PARAMS 45 # define PARAMS(protos) protos 46 #else /* Not C++ or ANSI C. */ 47 # undef PARAMS 48 # define PARAMS(protos) () 49 #endif /* C++ or ANSI C. */ 50 51 /* Specify we want GNU source code. This must be defined before any 52 system headers are included. */ 53 54 #define _GNU_SOURCE 1 55 56 57 #ifdef CRAY 58 /* This must happen before #include <signal.h> so 59 that the declaration therein is changed. */ 60 # define signal bsdsignal 61 #endif 62 63 /* If we're compiling for the dmalloc debugger, turn off string inlining. */ 64 #if defined(HAVE_DMALLOC_H) && defined(__GNUC__) 65 # define __NO_STRING_INLINES 66 #endif 67 68 #include <sys/types.h> 69 #include <sys/stat.h> 70 #include <signal.h> 71 #include <stdio.h> 72 #include <ctype.h> 73 #ifdef HAVE_SYS_TIMEB_H 74 /* SCO 3.2 "devsys 4.2" has a prototype for `ftime' in <time.h> that bombs 75 unless <sys/timeb.h> has been included first. Does every system have a 76 <sys/timeb.h>? If any does not, configure should check for it. */ 77 # include <sys/timeb.h> 78 #endif 79 80 #if TIME_WITH_SYS_TIME 81 # include <sys/time.h> 82 # include <time.h> 83 #else 84 # if HAVE_SYS_TIME_H 85 # include <sys/time.h> 86 # else 87 # include <time.h> 88 # endif 89 #endif 90 91 #include <errno.h> 92 93 #ifndef errno 94 extern int errno; 95 #endif 96 97 #ifndef isblank 98 # define isblank(c) ((c) == ' ' || (c) == '\t') 99 #endif 100 101 #ifdef HAVE_UNISTD_H 102 # include <unistd.h> 103 /* Ultrix's unistd.h always defines _POSIX_VERSION, but you only get 104 POSIX.1 behavior with `cc -YPOSIX', which predefines POSIX itself! */ 105 # if defined (_POSIX_VERSION) && !defined (ultrix) && !defined (VMS) 106 # define POSIX 1 107 # endif 108 #endif 109 110 /* Some systems define _POSIX_VERSION but are not really POSIX.1. */ 111 #if (defined (butterfly) || defined (__arm) || (defined (__mips) && defined (_SYSTYPE_SVR3)) || (defined (sequent) && defined (i386))) 112 # undef POSIX 113 #endif 114 115 #if !defined (POSIX) && defined (_AIX) && defined (_POSIX_SOURCE) 116 # define POSIX 1 117 #endif 118 119 #ifndef RETSIGTYPE 120 # define RETSIGTYPE void 121 #endif 122 123 #ifndef sigmask 124 # define sigmask(sig) (1 << ((sig) - 1)) 125 #endif 126 127 #ifndef HAVE_SA_RESTART 128 # define SA_RESTART 0 129 #endif 130 131 #ifdef HAVE_LIMITS_H 132 # include <limits.h> 133 #endif 134 #ifdef HAVE_SYS_PARAM_H 135 # include <sys/param.h> 136 #endif 137 138 #ifndef PATH_MAX 139 # ifndef POSIX 140 # define PATH_MAX MAXPATHLEN 141 # endif 142 #endif 143 #ifndef MAXPATHLEN 144 # define MAXPATHLEN 1024 145 #endif 146 147 #ifdef PATH_MAX 148 # define GET_PATH_MAX PATH_MAX 149 # define PATH_VAR(var) char var[PATH_MAX] 150 #else 151 # define NEED_GET_PATH_MAX 1 152 # define GET_PATH_MAX (get_path_max ()) 153 # define PATH_VAR(var) char *var = (char *) alloca (GET_PATH_MAX) 154 extern unsigned int get_path_max PARAMS ((void)); 155 #endif 156 157 #ifndef CHAR_BIT 158 # define CHAR_BIT 8 159 #endif 160 161 /* Nonzero if the integer type T is signed. */ 162 #define INTEGER_TYPE_SIGNED(t) ((t) -1 < 0) 163 164 /* The minimum and maximum values for the integer type T. 165 Use ~ (t) 0, not -1, for portability to 1's complement hosts. */ 166 #define INTEGER_TYPE_MINIMUM(t) \ 167 (! INTEGER_TYPE_SIGNED (t) ? (t) 0 : ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1)) 168 #define INTEGER_TYPE_MAXIMUM(t) (~ (t) 0 - INTEGER_TYPE_MINIMUM (t)) 169 170 #ifndef CHAR_MAX 171 # define CHAR_MAX INTEGER_TYPE_MAXIMUM (char) 172 #endif 173 174 #ifdef STAT_MACROS_BROKEN 175 # ifdef S_ISREG 176 # undef S_ISREG 177 # endif 178 # ifdef S_ISDIR 179 # undef S_ISDIR 180 # endif 181 #endif /* STAT_MACROS_BROKEN. */ 182 183 #ifndef S_ISREG 184 # define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG) 185 #endif 186 #ifndef S_ISDIR 187 # define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR) 188 #endif 189 190 #ifdef VMS 191 # include <types.h> 192 # include <unixlib.h> 193 # include <unixio.h> 194 # include <perror.h> 195 /* Needed to use alloca on VMS. */ 196 # include <builtins.h> 197 #endif 198 199 #ifndef __attribute__ 200 /* This feature is available in gcc versions 2.5 and later. */ 201 # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || __STRICT_ANSI__ 202 # define __attribute__(x) 203 # endif 204 /* The __-protected variants of `format' and `printf' attributes 205 are accepted by gcc versions 2.6.4 (effectively 2.7) and later. */ 206 # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7) 207 # define __format__ format 208 # define __printf__ printf 209 # endif 210 #endif 211 #define UNUSED __attribute__ ((unused)) 212 213 #if defined (STDC_HEADERS) || defined (__GNU_LIBRARY__) 214 # include <stdlib.h> 215 # include <string.h> 216 # define ANSI_STRING 1 217 #else /* No standard headers. */ 218 # ifdef HAVE_STRING_H 219 # include <string.h> 220 # define ANSI_STRING 1 221 # else 222 # include <strings.h> 223 # endif 224 # ifdef HAVE_MEMORY_H 225 # include <memory.h> 226 # endif 227 # ifdef HAVE_STDLIB_H 228 # include <stdlib.h> 229 # else 230 extern char *malloc PARAMS ((int)); 231 extern char *realloc PARAMS ((char *, int)); 232 extern void free PARAMS ((char *)); 233 234 extern void abort PARAMS ((void)) __attribute__ ((noreturn)); 235 extern void exit PARAMS ((int)) __attribute__ ((noreturn)); 236 # endif /* HAVE_STDLIB_H. */ 237 238 #endif /* Standard headers. */ 239 240 /* These should be in stdlib.h. Make sure we have them. */ 241 #ifndef EXIT_SUCCESS 242 # define EXIT_SUCCESS 0 243 #endif 244 #ifndef EXIT_FAILURE 245 # define EXIT_FAILURE 0 246 #endif 247 248 #ifdef ANSI_STRING 249 250 # ifndef bcmp 251 # define bcmp(s1, s2, n) memcmp ((s1), (s2), (n)) 252 # endif 253 # ifndef bzero 254 # define bzero(s, n) memset ((s), 0, (n)) 255 # endif 256 # if defined(HAVE_MEMMOVE) && !defined(bcopy) 257 # define bcopy(s, d, n) memmove ((d), (s), (n)) 258 # endif 259 260 #else /* Not ANSI_STRING. */ 261 262 # ifndef HAVE_STRCHR 263 # define strchr(s, c) index((s), (c)) 264 # define strrchr(s, c) rindex((s), (c)) 265 # endif 266 267 # ifndef bcmp 268 extern int bcmp PARAMS ((const char *, const char *, int)); 269 # endif 270 # ifndef bzero 271 extern void bzero PARAMS ((char *, int)); 272 #endif 273 # ifndef bcopy 274 extern void bcopy PARAMS ((const char *b1, char *b2, int)); 275 # endif 276 277 /* SCO Xenix has a buggy macro definition in <string.h>. */ 278 #undef strerror 279 #if !defined(__DECC) 280 extern char *strerror PARAMS ((int errnum)); 281 #endif 282 283 #endif /* !ANSI_STRING. */ 284 #undef ANSI_STRING 285 286 #if HAVE_INTTYPES_H 287 # include <inttypes.h> 288 #endif 289 #define FILE_TIMESTAMP uintmax_t 290 291 #if !defined(HAVE_STRSIGNAL) 292 extern char *strsignal PARAMS ((int signum)); 293 #endif 294 295 /* ISDIGIT offers the following features: 296 - Its arg may be any int or unsigned int; it need not be an unsigned char. 297 - It's guaranteed to evaluate its argument exactly once. 298 NOTE! Make relies on this behavior, don't change it! 299 - It's typically faster. 300 POSIX 1003.2-1992 section 2.5.2.1 page 50 lines 1556-1558 says that 301 only '0' through '9' are digits. Prefer ISDIGIT to isdigit() unless 302 it's important to use the locale's definition of `digit' even when the 303 host does not conform to POSIX. */ 304 #define ISDIGIT(c) ((unsigned) (c) - '0' <= 9) 305 306 #ifndef iAPX286 307 # define streq(a, b) \ 308 ((a) == (b) || \ 309 (*(a) == *(b) && (*(a) == '\0' || !strcmp ((a) + 1, (b) + 1)))) 310 # ifdef HAVE_CASE_INSENSITIVE_FS 311 /* This is only used on Windows/DOS platforms, so we assume strcmpi(). */ 312 # define strieq(a, b) \ 313 ((a) == (b) \ 314 || (tolower((unsigned char)*(a)) == tolower((unsigned char)*(b)) \ 315 && (*(a) == '\0' || !strcmpi ((a) + 1, (b) + 1)))) 316 # else 317 # define strieq(a, b) streq(a, b) 318 # endif 319 #else 320 /* Buggy compiler can't handle this. */ 321 # define streq(a, b) (strcmp ((a), (b)) == 0) 322 # define strieq(a, b) (strcmp ((a), (b)) == 0) 323 #endif 324 #define strneq(a, b, l) (strncmp ((a), (b), (l)) == 0) 325 #ifdef VMS 326 extern int strcmpi (const char *,const char *); 327 #endif 328 329 #if defined(__GNUC__) || defined(ENUM_BITFIELDS) 330 # define ENUM_BITFIELD(bits) :bits 331 #else 332 # define ENUM_BITFIELD(bits) 333 #endif 334 335 /* Handle gettext and locales. */ 336 337 #if HAVE_LOCALE_H 338 # include <locale.h> 339 #else 340 # define setlocale(category, locale) 341 #endif 342 343 #include <gettext.h> 344 345 #define _(msgid) gettext (msgid) 346 #define N_(msgid) gettext_noop (msgid) 347 #define S_(msg1,msg2,num) ngettext (msg1,msg2,num) 348 349 /* Handle other OSs. */ 350 #if defined(HAVE_DOS_PATHS) 351 # define PATH_SEPARATOR_CHAR ';' 352 #elif defined(VMS) 353 # define PATH_SEPARATOR_CHAR ',' 354 #else 355 # define PATH_SEPARATOR_CHAR ':' 356 #endif 357 358 /* This is needed for getcwd() and chdir(). */ 359 #if defined(_MSC_VER) || defined(__BORLANDC__) 360 # include <direct.h> 361 #endif 362 363 #ifdef WINDOWS32 364 # include <fcntl.h> 365 # include <malloc.h> 366 # define pipe(p) _pipe(p, 512, O_BINARY) 367 # define kill(pid,sig) w32_kill(pid,sig) 368 369 extern void sync_Path_environment(void); 370 extern int kill(int pid, int sig); 371 extern char *end_of_token_w32(char *s, char stopchar); 372 extern int find_and_set_default_shell(char *token); 373 374 /* indicates whether or not we have Bourne shell */ 375 extern int no_default_sh_exe; 376 377 /* is default_shell unixy? */ 378 extern int unixy_shell; 379 #endif /* WINDOWS32 */ 380 381 struct floc 382 { 383 const char *filenm; 384 unsigned long lineno; 385 }; 386 #define NILF ((struct floc *)0) 387 388 #define STRING_SIZE_TUPLE(_s) (_s), (sizeof (_s)-1) 389 390 391 /* We have to have stdarg.h or varargs.h AND v*printf or doprnt to use 392 variadic versions of these functions. */ 393 394 #if HAVE_STDARG_H || HAVE_VARARGS_H 395 # if HAVE_VPRINTF || HAVE_DOPRNT 396 # define USE_VARIADIC 1 397 # endif 398 #endif 399 400 #if HAVE_ANSI_COMPILER && USE_VARIADIC && HAVE_STDARG_H 401 extern void message (int prefix, const char *fmt, ...) 402 __attribute__ ((__format__ (__printf__, 2, 3))); 403 extern void error (const struct floc *flocp, const char *fmt, ...) 404 __attribute__ ((__format__ (__printf__, 2, 3))); 405 extern void fatal (const struct floc *flocp, const char *fmt, ...) 406 __attribute__ ((noreturn, __format__ (__printf__, 2, 3))); 407 #else 408 extern void message (); 409 extern void error (); 410 extern void fatal (); 411 #endif 412 413 extern void die PARAMS ((int)) __attribute__ ((noreturn)); 414 extern void log_working_directory PARAMS ((int)); 415 extern void pfatal_with_name PARAMS ((const char *)) __attribute__ ((noreturn)); 416 extern void perror_with_name PARAMS ((const char *, const char *)); 417 extern char *savestring PARAMS ((const char *, unsigned int)); 418 extern char *concat PARAMS ((const char *, const char *, const char *)); 419 extern char *xmalloc PARAMS ((unsigned int)); 420 extern char *xrealloc PARAMS ((char *, unsigned int)); 421 extern char *xstrdup PARAMS ((const char *)); 422 extern char *find_next_token PARAMS ((char **, unsigned int *)); 423 extern char *next_token PARAMS ((const char *)); 424 extern char *end_of_token PARAMS ((const char *)); 425 extern void collapse_continuations PARAMS ((char *)); 426 extern char *lindex PARAMS ((const char *, const char *, int)); 427 extern int alpha_compare PARAMS ((const void *, const void *)); 428 extern void print_spaces PARAMS ((unsigned int)); 429 extern char *find_percent PARAMS ((char *)); 430 extern FILE *open_tmpfile PARAMS ((char **, const char *)); 431 432 #ifndef NO_ARCHIVES 433 extern int ar_name PARAMS ((char *)); 434 extern void ar_parse_name PARAMS ((char *, char **, char **)); 435 extern int ar_touch PARAMS ((char *)); 436 extern time_t ar_member_date PARAMS ((char *)); 437 #endif 438 439 extern int dir_file_exists_p PARAMS ((char *, char *)); 440 extern int file_exists_p PARAMS ((char *)); 441 extern int file_impossible_p PARAMS ((char *)); 442 extern void file_impossible PARAMS ((char *)); 443 extern char *dir_name PARAMS ((char *)); 444 extern void hash_init_directories PARAMS ((void)); 445 446 extern void define_default_variables PARAMS ((void)); 447 extern void set_default_suffixes PARAMS ((void)); 448 extern void install_default_suffix_rules PARAMS ((void)); 449 extern void install_default_implicit_rules PARAMS ((void)); 450 451 extern void build_vpath_lists PARAMS ((void)); 452 extern void construct_vpath_list PARAMS ((char *pattern, char *dirpath)); 453 extern int vpath_search PARAMS ((char **file, FILE_TIMESTAMP *mtime_ptr)); 454 extern int gpath_search PARAMS ((char *file, unsigned int len)); 455 456 extern void construct_include_path PARAMS ((char **arg_dirs)); 457 458 extern void user_access PARAMS ((void)); 459 extern void make_access PARAMS ((void)); 460 extern void child_access PARAMS ((void)); 461 462 extern void close_stdout PARAMS ((void)); 463 464 extern char *strip_whitespace PARAMS ((const char **begpp, const char **endpp)); 465 466 /* String caching */ 467 extern void strcache_init PARAMS ((void)); 468 extern void strcache_print_stats PARAMS ((const char *prefix)); 469 extern int strcache_iscached PARAMS ((const char *str)); 470 extern const char *strcache_add PARAMS ((const char *str)); 471 extern const char *strcache_add_len PARAMS ((const char *str, int len)); 472 extern int strcache_setbufsize PARAMS ((int size)); 473 474 #ifdef HAVE_VFORK_H 475 # include <vfork.h> 476 #endif 477 478 /* We omit these declarations on non-POSIX systems which define _POSIX_VERSION, 479 because such systems often declare them in header files anyway. */ 480 481 #if !defined (__GNU_LIBRARY__) && !defined (POSIX) && !defined (_POSIX_VERSION) && !defined(WINDOWS32) 482 483 extern long int atol (); 484 # ifndef VMS 485 extern long int lseek (); 486 # endif 487 488 #endif /* Not GNU C library or POSIX. */ 489 490 #ifdef HAVE_GETCWD 491 # if !defined(VMS) && !defined(__DECC) 492 extern char *getcwd (); 493 # endif 494 #else 495 extern char *getwd (); 496 # define getcwd(buf, len) getwd (buf) 497 #endif 498 499 extern const struct floc *reading_file; 500 extern const struct floc **expanding_var; 501 502 extern char **environ; 503 504 extern int just_print_flag, silent_flag, ignore_errors_flag, keep_going_flag; 505 extern int print_data_base_flag, question_flag, touch_flag, always_make_flag; 506 extern int env_overrides, no_builtin_rules_flag, no_builtin_variables_flag; 507 extern int print_version_flag, print_directory_flag, check_symlink_flag; 508 extern int warn_undefined_variables_flag, posix_pedantic, not_parallel; 509 extern int second_expansion, clock_skew_detected, rebuilding_makefiles; 510 511 /* can we run commands via 'sh -c xxx' or must we use batch files? */ 512 extern int batch_mode_shell; 513 514 extern unsigned int job_slots; 515 extern int job_fds[2]; 516 extern int job_rfd; 517 #ifndef NO_FLOAT 518 extern double max_load_average; 519 #else 520 extern int max_load_average; 521 #endif 522 523 extern char *program; 524 extern char *starting_directory; 525 extern unsigned int makelevel; 526 extern char *version_string, *remote_description, *make_host; 527 528 extern unsigned int commands_started; 529 530 extern int handling_fatal_signal; 531 532 533 #ifndef MIN 534 #define MIN(_a,_b) ((_a)<(_b)?(_a):(_b)) 535 #endif 536 #ifndef MAX 537 #define MAX(_a,_b) ((_a)>(_b)?(_a):(_b)) 538 #endif 539 540 #ifdef VMS 541 # define MAKE_SUCCESS 1 542 # define MAKE_TROUBLE 2 543 # define MAKE_FAILURE 3 544 #else 545 # define MAKE_SUCCESS 0 546 # define MAKE_TROUBLE 1 547 # define MAKE_FAILURE 2 548 #endif 549 550 /* Set up heap debugging library dmalloc. */ 551 552 #ifdef HAVE_DMALLOC_H 553 #include <dmalloc.h> 554 #endif 555 556 #ifndef initialize_main 557 # ifdef __EMX__ 558 # define initialize_main(pargc, pargv) \ 559 { _wildcard(pargc, pargv); _response(pargc, pargv); } 560 # else 561 # define initialize_main(pargc, pargv) 562 # endif 563 #endif 564 565 566 #ifdef __EMX__ 567 # if !HAVE_STRCASECMP 568 # define strcasecmp stricmp 569 # endif 570 571 # if !defined chdir 572 # define chdir _chdir2 573 # endif 574 # if !defined getcwd 575 # define getcwd _getcwd2 576 # endif 577 578 /* NO_CHDIR2 causes make not to use _chdir2() and _getcwd2() instead of 579 chdir() and getcwd(). This avoids some error messages for the 580 make testsuite but restricts the drive letter support. */ 581 # ifdef NO_CHDIR2 582 # warning NO_CHDIR2: usage of drive letters restricted 583 # undef chdir 584 # undef getcwd 585 # endif 586 #endif 587 588 #ifndef initialize_main 589 # define initialize_main(pargc, pargv) 590 #endif 591 592 593 /* Some systems (like Solaris, PTX, etc.) do not support the SA_RESTART flag 594 properly according to POSIX. So, we try to wrap common system calls with 595 checks for EINTR. Note that there are still plenty of system calls that 596 can fail with EINTR but this, reportedly, gets the vast majority of 597 failure cases. If you still experience failures you'll need to either get 598 a system where SA_RESTART works, or you need to avoid -j. */ 599 600 #define EINTRLOOP(_v,_c) while (((_v)=_c)==-1 && errno==EINTR) 601 602 /* While system calls that return integers are pretty consistent about 603 returning -1 on failure and setting errno in that case, functions that 604 return pointers are not always so well behaved. Sometimes they return 605 NULL for expected behavior: one good example is readdir() which returns 606 NULL at the end of the directory--and _doesn't_ reset errno. So, we have 607 to do it ourselves here. */ 608 609 #define ENULLLOOP(_v,_c) do{ errno = 0; \ 610 while (((_v)=_c)==0 && errno==EINTR); }while(0) 611 612