1 /* Wrapper to call lto. Used by collect2 and the linker plugin. 2 Copyright (C) 2009, 2010 Free Software Foundation, Inc. 3 4 Factored out of collect2 by Rafael Espindola <espindola@google.com> 5 6 This file is part of GCC. 7 8 GCC is free software; you can redistribute it and/or modify it under 9 the terms of the GNU General Public License as published by the Free 10 Software Foundation; either version 3, or (at your option) any later 11 version. 12 13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 14 WARRANTY; without even the implied warranty of MERCHANTABILITY or 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 16 for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with GCC; see the file COPYING3. If not see 20 <http://www.gnu.org/licenses/>. */ 21 22 23 /* This program is passed a gcc, a list of gcc arguments and a list of 24 object files containing IL. It scans the argument list to check if 25 we are in whopr mode or not modifies the arguments and needed and 26 prints a list of output files on stdout. 27 28 Example: 29 30 $ lto-wrapper gcc/xgcc -B gcc a.o b.o -o test -flto 31 32 The above will print something like 33 /tmp/ccwbQ8B2.lto.o 34 35 If WHOPR is used instead, more than one file might be produced 36 ./ccXj2DTk.lto.ltrans.o 37 ./ccCJuXGv.lto.ltrans.o 38 */ 39 40 #include "config.h" 41 #include "system.h" 42 #include "coretypes.h" 43 #include "intl.h" 44 #include "diagnostic.h" 45 #include "obstack.h" 46 #include "opts.h" 47 #include "options.h" 48 #include "simple-object.h" 49 50 /* From lto-streamer.h which we cannot include with -fkeep-inline-functions. 51 ??? Split out a lto-streamer-core.h. */ 52 53 #define LTO_SECTION_NAME_PREFIX ".gnu.lto_" 54 55 /* End of lto-streamer.h copy. */ 56 57 int debug; /* true if -save-temps. */ 58 int verbose; /* true if -v. */ 59 60 enum lto_mode_d { 61 LTO_MODE_NONE, /* Not doing LTO. */ 62 LTO_MODE_LTO, /* Normal LTO. */ 63 LTO_MODE_WHOPR /* WHOPR. */ 64 }; 65 66 /* Current LTO mode. */ 67 static enum lto_mode_d lto_mode = LTO_MODE_NONE; 68 69 static char *ltrans_output_file; 70 static char *flto_out; 71 static char *args_name; 72 static unsigned int nr; 73 static char **input_names; 74 static char **output_names; 75 static char *makefile; 76 77 static void maybe_unlink_file (const char *); 78 79 /* Delete tempfiles. */ 80 81 static void 82 lto_wrapper_cleanup (void) 83 { 84 static bool cleanup_done = false; 85 unsigned int i; 86 87 if (cleanup_done) 88 return; 89 90 /* Setting cleanup_done prevents an infinite loop if one of the 91 calls to maybe_unlink_file fails. */ 92 cleanup_done = true; 93 94 if (ltrans_output_file) 95 maybe_unlink_file (ltrans_output_file); 96 if (flto_out) 97 maybe_unlink_file (flto_out); 98 if (args_name) 99 maybe_unlink_file (args_name); 100 if (makefile) 101 maybe_unlink_file (makefile); 102 for (i = 0; i < nr; ++i) 103 { 104 maybe_unlink_file (input_names[i]); 105 if (output_names[i]) 106 maybe_unlink_file (output_names[i]); 107 } 108 } 109 110 static void 111 fatal_signal (int signum) 112 { 113 signal (signum, SIG_DFL); 114 lto_wrapper_cleanup (); 115 /* Get the same signal again, this time not handled, 116 so its normal effect occurs. */ 117 kill (getpid (), signum); 118 } 119 120 /* Just die. CMSGID is the error message. */ 121 122 static void __attribute__ ((format (printf, 1, 2))) 123 fatal (const char * cmsgid, ...) 124 { 125 va_list ap; 126 127 va_start (ap, cmsgid); 128 fprintf (stderr, "lto-wrapper: "); 129 vfprintf (stderr, _(cmsgid), ap); 130 fprintf (stderr, "\n"); 131 va_end (ap); 132 133 lto_wrapper_cleanup (); 134 exit (FATAL_EXIT_CODE); 135 } 136 137 138 /* Die when sys call fails. CMSGID is the error message. */ 139 140 static void __attribute__ ((format (printf, 1, 2))) 141 fatal_perror (const char *cmsgid, ...) 142 { 143 int e = errno; 144 va_list ap; 145 146 va_start (ap, cmsgid); 147 fprintf (stderr, "lto-wrapper: "); 148 vfprintf (stderr, _(cmsgid), ap); 149 fprintf (stderr, ": %s\n", xstrerror (e)); 150 va_end (ap); 151 152 lto_wrapper_cleanup (); 153 exit (FATAL_EXIT_CODE); 154 } 155 156 157 /* Execute a program, and wait for the reply. ARGV are the arguments. The 158 last one must be NULL. */ 159 160 static struct pex_obj * 161 collect_execute (char **argv) 162 { 163 struct pex_obj *pex; 164 const char *errmsg; 165 int err; 166 167 if (verbose) 168 { 169 char **p_argv; 170 const char *str; 171 172 for (p_argv = argv; (str = *p_argv) != (char *) 0; p_argv++) 173 fprintf (stderr, " %s", str); 174 175 fprintf (stderr, "\n"); 176 } 177 178 fflush (stdout); 179 fflush (stderr); 180 181 pex = pex_init (0, "lto-wrapper", NULL); 182 if (pex == NULL) 183 fatal_perror ("pex_init failed"); 184 185 /* Do not use PEX_LAST here, we use our stdout for communicating with 186 collect2 or the linker-plugin. Any output from the sub-process 187 will confuse that. */ 188 errmsg = pex_run (pex, PEX_SEARCH, argv[0], argv, NULL, 189 NULL, &err); 190 if (errmsg != NULL) 191 { 192 if (err != 0) 193 { 194 errno = err; 195 fatal_perror (errmsg); 196 } 197 else 198 fatal (errmsg); 199 } 200 201 return pex; 202 } 203 204 205 /* Wait for a process to finish, and exit if a nonzero status is found. 206 PROG is the program name. PEX is the process we should wait for. */ 207 208 static int 209 collect_wait (const char *prog, struct pex_obj *pex) 210 { 211 int status; 212 213 if (!pex_get_status (pex, 1, &status)) 214 fatal_perror ("can't get program status"); 215 pex_free (pex); 216 217 if (status) 218 { 219 if (WIFSIGNALED (status)) 220 { 221 int sig = WTERMSIG (status); 222 if (WCOREDUMP (status)) 223 fatal ("%s terminated with signal %d [%s], core dumped", 224 prog, sig, strsignal (sig)); 225 else 226 fatal ("%s terminated with signal %d [%s]", 227 prog, sig, strsignal (sig)); 228 } 229 230 if (WIFEXITED (status)) 231 fatal ("%s returned %d exit status", prog, WEXITSTATUS (status)); 232 } 233 234 return 0; 235 } 236 237 238 /* Unlink a temporary LTRANS file unless requested otherwise. */ 239 240 static void 241 maybe_unlink_file (const char *file) 242 { 243 if (! debug) 244 { 245 if (unlink_if_ordinary (file) 246 && errno != ENOENT) 247 fatal_perror ("deleting LTRANS file %s", file); 248 } 249 else 250 fprintf (stderr, "[Leaving LTRANS %s]\n", file); 251 } 252 253 254 /* Execute program ARGV[0] with arguments ARGV. Wait for it to finish. */ 255 256 static void 257 fork_execute (char **argv) 258 { 259 struct pex_obj *pex; 260 char *new_argv[3]; 261 char *at_args; 262 FILE *args; 263 int status; 264 265 args_name = make_temp_file (".args"); 266 at_args = concat ("@", args_name, NULL); 267 args = fopen (args_name, "w"); 268 if (args == NULL) 269 fatal ("failed to open %s", args_name); 270 271 status = writeargv (&argv[1], args); 272 273 if (status) 274 fatal ("could not write to temporary file %s", args_name); 275 276 fclose (args); 277 278 new_argv[0] = argv[0]; 279 new_argv[1] = at_args; 280 new_argv[2] = NULL; 281 282 pex = collect_execute (new_argv); 283 collect_wait (new_argv[0], pex); 284 285 maybe_unlink_file (args_name); 286 args_name = NULL; 287 free (at_args); 288 } 289 290 /* Template of LTRANS dumpbase suffix. */ 291 #define DUMPBASE_SUFFIX ".ltrans18446744073709551615" 292 293 /* Create decoded options from the COLLECT_GCC and COLLECT_GCC_OPTIONS 294 environment according to LANG_MASK. */ 295 296 static void 297 get_options_from_collect_gcc_options (const char *collect_gcc, 298 const char *collect_gcc_options, 299 unsigned int lang_mask, 300 struct cl_decoded_option **decoded_options, 301 unsigned int *decoded_options_count) 302 { 303 struct obstack argv_obstack; 304 char *argv_storage; 305 const char **argv; 306 int j, k, argc; 307 308 argv_storage = xstrdup (collect_gcc_options); 309 obstack_init (&argv_obstack); 310 obstack_ptr_grow (&argv_obstack, collect_gcc); 311 312 for (j = 0, k = 0; argv_storage[j] != '\0'; ++j) 313 { 314 if (argv_storage[j] == '\'') 315 { 316 obstack_ptr_grow (&argv_obstack, &argv_storage[k]); 317 ++j; 318 do 319 { 320 if (argv_storage[j] == '\0') 321 fatal ("malformed COLLECT_GCC_OPTIONS"); 322 else if (strncmp (&argv_storage[j], "'\\''", 4) == 0) 323 { 324 argv_storage[k++] = '\''; 325 j += 4; 326 } 327 else if (argv_storage[j] == '\'') 328 break; 329 else 330 argv_storage[k++] = argv_storage[j++]; 331 } 332 while (1); 333 argv_storage[k++] = '\0'; 334 } 335 } 336 337 obstack_ptr_grow (&argv_obstack, NULL); 338 argc = obstack_object_size (&argv_obstack) / sizeof (void *) - 1; 339 argv = XOBFINISH (&argv_obstack, const char **); 340 341 decode_cmdline_options_to_array (argc, (const char **)argv, 342 lang_mask, 343 decoded_options, decoded_options_count); 344 obstack_free (&argv_obstack, NULL); 345 } 346 347 /* Append OPTION to the options array DECODED_OPTIONS with size 348 DECODED_OPTIONS_COUNT. */ 349 350 static void 351 append_option (struct cl_decoded_option **decoded_options, 352 unsigned int *decoded_options_count, 353 struct cl_decoded_option *option) 354 { 355 ++*decoded_options_count; 356 *decoded_options 357 = (struct cl_decoded_option *) 358 xrealloc (*decoded_options, 359 (*decoded_options_count 360 * sizeof (struct cl_decoded_option))); 361 memcpy (&(*decoded_options)[*decoded_options_count - 1], option, 362 sizeof (struct cl_decoded_option)); 363 } 364 365 /* Try to merge and complain about options FDECODED_OPTIONS when applied 366 ontop of DECODED_OPTIONS. */ 367 368 static void 369 merge_and_complain (struct cl_decoded_option **decoded_options, 370 unsigned int *decoded_options_count, 371 struct cl_decoded_option *fdecoded_options, 372 unsigned int fdecoded_options_count) 373 { 374 unsigned int i, j; 375 376 /* ??? Merge options from files. Most cases can be 377 handled by either unioning or intersecting 378 (for example -fwrapv is a case for unioning, 379 -ffast-math is for intersection). Most complaints 380 about real conflicts between different options can 381 be deferred to the compiler proper. Options that 382 we can neither safely handle by intersection nor 383 unioning would need to be complained about here. 384 Ideally we'd have a flag in the opt files that 385 tells whether to union or intersect or reject. 386 In absence of that it's unclear what a good default is. 387 It's also difficult to get positional handling correct. */ 388 389 /* The following does what the old LTO option code did, 390 union all target and a selected set of common options. */ 391 for (i = 0; i < fdecoded_options_count; ++i) 392 { 393 struct cl_decoded_option *foption = &fdecoded_options[i]; 394 switch (foption->opt_index) 395 { 396 case OPT_SPECIAL_unknown: 397 case OPT_SPECIAL_ignore: 398 case OPT_SPECIAL_program_name: 399 case OPT_SPECIAL_input_file: 400 break; 401 402 default: 403 if (!(cl_options[foption->opt_index].flags & CL_TARGET)) 404 break; 405 406 /* Fallthru. */ 407 case OPT_fPIC: 408 case OPT_fpic: 409 case OPT_fpie: 410 case OPT_fcommon: 411 case OPT_fexceptions: 412 case OPT_fgnu_tm: 413 /* Do what the old LTO code did - collect exactly one option 414 setting per OPT code, we pick the first we encounter. 415 ??? This doesn't make too much sense, but when it doesn't 416 then we should complain. */ 417 for (j = 0; j < *decoded_options_count; ++j) 418 if ((*decoded_options)[j].opt_index == foption->opt_index) 419 break; 420 if (j == *decoded_options_count) 421 append_option (decoded_options, decoded_options_count, foption); 422 break; 423 } 424 } 425 } 426 427 /* Execute gcc. ARGC is the number of arguments. ARGV contains the arguments. */ 428 429 static void 430 run_gcc (unsigned argc, char *argv[]) 431 { 432 unsigned i, j; 433 const char **new_argv; 434 const char **argv_ptr; 435 char *list_option_full = NULL; 436 const char *linker_output = NULL; 437 const char *collect_gcc, *collect_gcc_options; 438 int parallel = 0; 439 int jobserver = 0; 440 bool no_partition = false; 441 struct cl_decoded_option *fdecoded_options = NULL; 442 unsigned int fdecoded_options_count = 0; 443 struct cl_decoded_option *decoded_options; 444 unsigned int decoded_options_count; 445 struct obstack argv_obstack; 446 int new_head_argc; 447 448 /* Get the driver and options. */ 449 collect_gcc = getenv ("COLLECT_GCC"); 450 if (!collect_gcc) 451 fatal ("environment variable COLLECT_GCC must be set"); 452 collect_gcc_options = getenv ("COLLECT_GCC_OPTIONS"); 453 if (!collect_gcc_options) 454 fatal ("environment variable COLLECT_GCC_OPTIONS must be set"); 455 get_options_from_collect_gcc_options (collect_gcc, collect_gcc_options, 456 CL_LANG_ALL, 457 &decoded_options, 458 &decoded_options_count); 459 460 /* Look at saved options in the IL files. */ 461 for (i = 1; i < argc; ++i) 462 { 463 char *data, *p; 464 char *fopts; 465 int fd; 466 const char *errmsg; 467 int err; 468 off_t file_offset = 0, offset, length; 469 long loffset; 470 simple_object_read *sobj; 471 int consumed; 472 struct cl_decoded_option *f2decoded_options; 473 unsigned int f2decoded_options_count; 474 char *filename = argv[i]; 475 if ((p = strrchr (argv[i], '@')) 476 && p != argv[i] 477 && sscanf (p, "@%li%n", &loffset, &consumed) >= 1 478 && strlen (p) == (unsigned int) consumed) 479 { 480 filename = XNEWVEC (char, p - argv[i] + 1); 481 memcpy (filename, argv[i], p - argv[i]); 482 filename[p - argv[i]] = '\0'; 483 file_offset = (off_t) loffset; 484 } 485 fd = open (argv[i], O_RDONLY); 486 if (fd == -1) 487 continue; 488 sobj = simple_object_start_read (fd, file_offset, "__GNU_LTO", 489 &errmsg, &err); 490 if (!sobj) 491 { 492 close (fd); 493 continue; 494 } 495 if (!simple_object_find_section (sobj, LTO_SECTION_NAME_PREFIX "." "opts", 496 &offset, &length, &errmsg, &err)) 497 { 498 simple_object_release_read (sobj); 499 close (fd); 500 continue; 501 } 502 lseek (fd, file_offset + offset, SEEK_SET); 503 data = (char *)xmalloc (length); 504 read (fd, data, length); 505 fopts = data; 506 do 507 { 508 get_options_from_collect_gcc_options (collect_gcc, 509 fopts, CL_LANG_ALL, 510 &f2decoded_options, 511 &f2decoded_options_count); 512 if (!fdecoded_options) 513 { 514 fdecoded_options = f2decoded_options; 515 fdecoded_options_count = f2decoded_options_count; 516 } 517 else 518 merge_and_complain (&fdecoded_options, 519 &fdecoded_options_count, 520 f2decoded_options, f2decoded_options_count); 521 522 fopts += strlen (fopts) + 1; 523 } 524 while (fopts - data < length); 525 526 free (data); 527 simple_object_release_read (sobj); 528 close (fd); 529 } 530 531 /* Initalize the common arguments for the driver. */ 532 obstack_init (&argv_obstack); 533 obstack_ptr_grow (&argv_obstack, collect_gcc); 534 obstack_ptr_grow (&argv_obstack, "-xlto"); 535 obstack_ptr_grow (&argv_obstack, "-c"); 536 537 /* Append compiler driver arguments as far as they were merged. */ 538 for (j = 1; j < fdecoded_options_count; ++j) 539 { 540 struct cl_decoded_option *option = &fdecoded_options[j]; 541 542 /* File options have been properly filtered by lto-opts.c. */ 543 switch (option->opt_index) 544 { 545 /* Drop arguments that we want to take from the link line. */ 546 case OPT_flto_: 547 case OPT_flto: 548 case OPT_flto_partition_none: 549 case OPT_flto_partition_1to1: 550 case OPT_flto_partition_balanced: 551 continue; 552 553 default: 554 break; 555 } 556 557 /* For now do what the original LTO option code was doing - pass 558 on any CL_TARGET flag and a few selected others. */ 559 switch (option->opt_index) 560 { 561 case OPT_fPIC: 562 case OPT_fpic: 563 case OPT_fpie: 564 case OPT_fcommon: 565 case OPT_fexceptions: 566 case OPT_fgnu_tm: 567 break; 568 569 default: 570 if (!(cl_options[option->opt_index].flags & CL_TARGET)) 571 continue; 572 } 573 574 /* Pass the option on. */ 575 for (i = 0; i < option->canonical_option_num_elements; ++i) 576 obstack_ptr_grow (&argv_obstack, option->canonical_option[i]); 577 } 578 579 /* Append linker driver arguments. Compiler options from the linker 580 driver arguments will override / merge with those from the compiler. */ 581 for (j = 1; j < decoded_options_count; ++j) 582 { 583 struct cl_decoded_option *option = &decoded_options[j]; 584 585 /* Do not pass on frontend specific flags not suitable for lto. */ 586 if (!(cl_options[option->opt_index].flags 587 & (CL_COMMON|CL_TARGET|CL_DRIVER|CL_LTO))) 588 continue; 589 590 switch (option->opt_index) 591 { 592 case OPT_o: 593 linker_output = option->arg; 594 /* We generate new intermediate output, drop this arg. */ 595 continue; 596 597 case OPT_save_temps: 598 debug = 1; 599 break; 600 601 case OPT_v: 602 verbose = 1; 603 break; 604 605 case OPT_flto_partition_none: 606 no_partition = true; 607 break; 608 609 case OPT_flto_: 610 if (strcmp (option->arg, "jobserver") == 0) 611 { 612 jobserver = 1; 613 parallel = 1; 614 } 615 else 616 { 617 parallel = atoi (option->arg); 618 if (parallel <= 1) 619 parallel = 0; 620 } 621 /* Fallthru. */ 622 623 case OPT_flto: 624 lto_mode = LTO_MODE_WHOPR; 625 /* We've handled these LTO options, do not pass them on. */ 626 continue; 627 628 default: 629 break; 630 } 631 632 /* Pass the option on. */ 633 for (i = 0; i < option->canonical_option_num_elements; ++i) 634 obstack_ptr_grow (&argv_obstack, option->canonical_option[i]); 635 } 636 637 if (no_partition) 638 { 639 lto_mode = LTO_MODE_LTO; 640 jobserver = 0; 641 parallel = 0; 642 } 643 644 if (linker_output) 645 { 646 char *output_dir, *base, *name; 647 bool bit_bucket = strcmp (linker_output, HOST_BIT_BUCKET) == 0; 648 649 output_dir = xstrdup (linker_output); 650 base = output_dir; 651 for (name = base; *name; name++) 652 if (IS_DIR_SEPARATOR (*name)) 653 base = name + 1; 654 *base = '\0'; 655 656 linker_output = &linker_output[base - output_dir]; 657 if (*output_dir == '\0') 658 { 659 static char current_dir[] = { '.', DIR_SEPARATOR, '\0' }; 660 output_dir = current_dir; 661 } 662 if (!bit_bucket) 663 { 664 obstack_ptr_grow (&argv_obstack, "-dumpdir"); 665 obstack_ptr_grow (&argv_obstack, output_dir); 666 } 667 668 obstack_ptr_grow (&argv_obstack, "-dumpbase"); 669 } 670 671 /* Remember at which point we can scrub args to re-use the commons. */ 672 new_head_argc = obstack_object_size (&argv_obstack) / sizeof (void *); 673 674 if (lto_mode == LTO_MODE_LTO) 675 { 676 flto_out = make_temp_file (".lto.o"); 677 if (linker_output) 678 obstack_ptr_grow (&argv_obstack, linker_output); 679 obstack_ptr_grow (&argv_obstack, "-o"); 680 obstack_ptr_grow (&argv_obstack, flto_out); 681 } 682 else 683 { 684 const char *list_option = "-fltrans-output-list="; 685 size_t list_option_len = strlen (list_option); 686 char *tmp; 687 688 if (linker_output) 689 { 690 char *dumpbase = (char *) xmalloc (strlen (linker_output) 691 + sizeof (".wpa") + 1); 692 strcpy (dumpbase, linker_output); 693 strcat (dumpbase, ".wpa"); 694 obstack_ptr_grow (&argv_obstack, dumpbase); 695 } 696 697 if (linker_output && debug) 698 { 699 ltrans_output_file = (char *) xmalloc (strlen (linker_output) 700 + sizeof (".ltrans.out") + 1); 701 strcpy (ltrans_output_file, linker_output); 702 strcat (ltrans_output_file, ".ltrans.out"); 703 } 704 else 705 ltrans_output_file = make_temp_file (".ltrans.out"); 706 list_option_full = (char *) xmalloc (sizeof (char) * 707 (strlen (ltrans_output_file) + list_option_len + 1)); 708 tmp = list_option_full; 709 710 obstack_ptr_grow (&argv_obstack, tmp); 711 strcpy (tmp, list_option); 712 tmp += list_option_len; 713 strcpy (tmp, ltrans_output_file); 714 715 obstack_ptr_grow (&argv_obstack, "-fwpa"); 716 } 717 718 /* Append the input objects and possible preceeding arguments. */ 719 for (i = 1; i < argc; ++i) 720 obstack_ptr_grow (&argv_obstack, argv[i]); 721 obstack_ptr_grow (&argv_obstack, NULL); 722 723 new_argv = XOBFINISH (&argv_obstack, const char **); 724 argv_ptr = &new_argv[new_head_argc]; 725 fork_execute (CONST_CAST (char **, new_argv)); 726 727 if (lto_mode == LTO_MODE_LTO) 728 { 729 printf("%s\n", flto_out); 730 free (flto_out); 731 flto_out = NULL; 732 } 733 else 734 { 735 FILE *stream = fopen (ltrans_output_file, "r"); 736 FILE *mstream = NULL; 737 struct obstack env_obstack; 738 739 if (!stream) 740 fatal_perror ("fopen: %s", ltrans_output_file); 741 742 /* Parse the list of LTRANS inputs from the WPA stage. */ 743 obstack_init (&env_obstack); 744 nr = 0; 745 for (;;) 746 { 747 const unsigned piece = 32; 748 char *output_name = NULL; 749 char *buf, *input_name = (char *)xmalloc (piece); 750 size_t len; 751 752 buf = input_name; 753 cont: 754 if (!fgets (buf, piece, stream)) 755 break; 756 len = strlen (input_name); 757 if (input_name[len - 1] != '\n') 758 { 759 input_name = (char *)xrealloc (input_name, len + piece); 760 buf = input_name + len; 761 goto cont; 762 } 763 input_name[len - 1] = '\0'; 764 765 if (input_name[0] == '*') 766 output_name = &input_name[1]; 767 768 nr++; 769 input_names = (char **)xrealloc (input_names, nr * sizeof (char *)); 770 output_names = (char **)xrealloc (output_names, nr * sizeof (char *)); 771 input_names[nr-1] = input_name; 772 output_names[nr-1] = output_name; 773 } 774 fclose (stream); 775 maybe_unlink_file (ltrans_output_file); 776 ltrans_output_file = NULL; 777 778 if (parallel) 779 { 780 makefile = make_temp_file (".mk"); 781 mstream = fopen (makefile, "w"); 782 } 783 784 /* Execute the LTRANS stage for each input file (or prepare a 785 makefile to invoke this in parallel). */ 786 for (i = 0; i < nr; ++i) 787 { 788 char *output_name; 789 char *input_name = input_names[i]; 790 /* If it's a pass-through file do nothing. */ 791 if (output_names[i]) 792 continue; 793 794 /* Replace the .o suffix with a .ltrans.o suffix and write 795 the resulting name to the LTRANS output list. */ 796 obstack_grow (&env_obstack, input_name, strlen (input_name) - 2); 797 obstack_grow (&env_obstack, ".ltrans.o", sizeof (".ltrans.o")); 798 output_name = XOBFINISH (&env_obstack, char *); 799 800 /* Adjust the dumpbase if the linker output file was seen. */ 801 if (linker_output) 802 { 803 char *dumpbase 804 = (char *) xmalloc (strlen (linker_output) 805 + sizeof(DUMPBASE_SUFFIX) + 1); 806 snprintf (dumpbase, 807 strlen (linker_output) + sizeof(DUMPBASE_SUFFIX), 808 "%s.ltrans%u", linker_output, i); 809 argv_ptr[0] = dumpbase; 810 } 811 812 argv_ptr[1] = "-fltrans"; 813 argv_ptr[2] = "-o"; 814 argv_ptr[3] = output_name; 815 argv_ptr[4] = input_name; 816 argv_ptr[5] = NULL; 817 if (parallel) 818 { 819 fprintf (mstream, "%s:\n\t@%s ", output_name, new_argv[0]); 820 for (j = 1; new_argv[j] != NULL; ++j) 821 fprintf (mstream, " '%s'", new_argv[j]); 822 fprintf (mstream, "\n"); 823 /* If we are not preserving the ltrans input files then 824 truncate them as soon as we have processed it. This 825 reduces temporary disk-space usage. */ 826 if (! debug) 827 fprintf (mstream, "\t@-touch -r %s %s.tem > /dev/null 2>&1 " 828 "&& mv %s.tem %s\n", 829 input_name, input_name, input_name, input_name); 830 } 831 else 832 { 833 fork_execute (CONST_CAST (char **, new_argv)); 834 maybe_unlink_file (input_name); 835 } 836 837 output_names[i] = output_name; 838 } 839 if (parallel) 840 { 841 struct pex_obj *pex; 842 char jobs[32]; 843 844 fprintf (mstream, "all:"); 845 for (i = 0; i < nr; ++i) 846 fprintf (mstream, " \\\n\t%s", output_names[i]); 847 fprintf (mstream, "\n"); 848 fclose (mstream); 849 if (!jobserver) 850 { 851 /* Avoid passing --jobserver-fd= and similar flags 852 unless jobserver mode is explicitly enabled. */ 853 putenv (xstrdup ("MAKEFLAGS=")); 854 putenv (xstrdup ("MFLAGS=")); 855 } 856 new_argv[0] = getenv ("MAKE"); 857 if (!new_argv[0]) 858 new_argv[0] = "make"; 859 new_argv[1] = "-f"; 860 new_argv[2] = makefile; 861 i = 3; 862 if (!jobserver) 863 { 864 snprintf (jobs, 31, "-j%d", parallel); 865 new_argv[i++] = jobs; 866 } 867 new_argv[i++] = "all"; 868 new_argv[i++] = NULL; 869 pex = collect_execute (CONST_CAST (char **, new_argv)); 870 collect_wait (new_argv[0], pex); 871 maybe_unlink_file (makefile); 872 makefile = NULL; 873 for (i = 0; i < nr; ++i) 874 maybe_unlink_file (input_names[i]); 875 } 876 for (i = 0; i < nr; ++i) 877 { 878 fputs (output_names[i], stdout); 879 putc ('\n', stdout); 880 free (input_names[i]); 881 } 882 nr = 0; 883 free (output_names); 884 free (input_names); 885 free (list_option_full); 886 obstack_free (&env_obstack, NULL); 887 } 888 889 obstack_free (&argv_obstack, NULL); 890 } 891 892 893 /* Entry point. */ 894 895 int 896 main (int argc, char *argv[]) 897 { 898 const char *p; 899 900 p = argv[0] + strlen (argv[0]); 901 while (p != argv[0] && !IS_DIR_SEPARATOR (p[-1])) 902 --p; 903 progname = p; 904 905 xmalloc_set_program_name (progname); 906 907 gcc_init_libintl (); 908 909 diagnostic_initialize (global_dc, 0); 910 911 if (signal (SIGINT, SIG_IGN) != SIG_IGN) 912 signal (SIGINT, fatal_signal); 913 #ifdef SIGHUP 914 if (signal (SIGHUP, SIG_IGN) != SIG_IGN) 915 signal (SIGHUP, fatal_signal); 916 #endif 917 if (signal (SIGTERM, SIG_IGN) != SIG_IGN) 918 signal (SIGTERM, fatal_signal); 919 #ifdef SIGPIPE 920 if (signal (SIGPIPE, SIG_IGN) != SIG_IGN) 921 signal (SIGPIPE, fatal_signal); 922 #endif 923 #ifdef SIGCHLD 924 /* We *MUST* set SIGCHLD to SIG_DFL so that the wait4() call will 925 receive the signal. A different setting is inheritable */ 926 signal (SIGCHLD, SIG_DFL); 927 #endif 928 929 /* We may be called with all the arguments stored in some file and 930 passed with @file. Expand them into argv before processing. */ 931 expandargv (&argc, &argv); 932 933 run_gcc (argc, argv); 934 935 return 0; 936 } 937