1 /* Wrapper to call lto. Used by collect2 and the linker plugin.
2 Copyright (C) 2009, 2010 Free Software Foundation, Inc.
4 Factored out of collect2 by Rafael Espindola <espindola@google.com>
6 This file is part of GCC.
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
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
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/>. */
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.
30 $ lto-wrapper gcc/xgcc -B gcc a.o b.o -o test -flto
32 The above will print something like
35 If WHOPR is used instead, more than one file might be produced
36 ./ccXj2DTk.lto.ltrans.o
37 ./ccCJuXGv.lto.ltrans.o
42 #include "coretypes.h"
44 #include "diagnostic.h"
48 #include "simple-object.h"
50 /* From lto-streamer.h which we cannot include with -fkeep-inline-functions.
51 ??? Split out a lto-streamer-core.h. */
53 #define LTO_SECTION_NAME_PREFIX ".gnu.lto_"
55 /* End of lto-streamer.h copy. */
57 int debug
; /* true if -save-temps. */
58 int verbose
; /* true if -v. */
61 LTO_MODE_NONE
, /* Not doing LTO. */
62 LTO_MODE_LTO
, /* Normal LTO. */
63 LTO_MODE_WHOPR
/* WHOPR. */
66 /* Current LTO mode. */
67 static enum lto_mode_d lto_mode
= LTO_MODE_NONE
;
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
;
77 static void maybe_unlink_file (const char *);
79 /* Delete tempfiles. */
82 lto_wrapper_cleanup (void)
84 static bool cleanup_done
= false;
90 /* Setting cleanup_done prevents an infinite loop if one of the
91 calls to maybe_unlink_file fails. */
94 if (ltrans_output_file
)
95 maybe_unlink_file (ltrans_output_file
);
97 maybe_unlink_file (flto_out
);
99 maybe_unlink_file (args_name
);
101 maybe_unlink_file (makefile
);
102 for (i
= 0; i
< nr
; ++i
)
104 maybe_unlink_file (input_names
[i
]);
106 maybe_unlink_file (output_names
[i
]);
111 fatal_signal (int signum
)
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
);
120 /* Just die. CMSGID is the error message. */
122 static void __attribute__ ((format (printf
, 1, 2)))
123 fatal (const char * cmsgid
, ...)
127 va_start (ap
, cmsgid
);
128 fprintf (stderr
, "lto-wrapper: ");
129 vfprintf (stderr
, _(cmsgid
), ap
);
130 fprintf (stderr
, "\n");
133 lto_wrapper_cleanup ();
134 exit (FATAL_EXIT_CODE
);
138 /* Die when sys call fails. CMSGID is the error message. */
140 static void __attribute__ ((format (printf
, 1, 2)))
141 fatal_perror (const char *cmsgid
, ...)
146 va_start (ap
, cmsgid
);
147 fprintf (stderr
, "lto-wrapper: ");
148 vfprintf (stderr
, _(cmsgid
), ap
);
149 fprintf (stderr
, ": %s\n", xstrerror (e
));
152 lto_wrapper_cleanup ();
153 exit (FATAL_EXIT_CODE
);
157 /* Execute a program, and wait for the reply. ARGV are the arguments. The
158 last one must be NULL. */
160 static struct pex_obj
*
161 collect_execute (char **argv
)
172 for (p_argv
= argv
; (str
= *p_argv
) != (char *) 0; p_argv
++)
173 fprintf (stderr
, " %s", str
);
175 fprintf (stderr
, "\n");
181 pex
= pex_init (0, "lto-wrapper", NULL
);
183 fatal_perror ("pex_init failed");
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
,
195 fatal_perror (errmsg
);
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. */
209 collect_wait (const char *prog
, struct pex_obj
*pex
)
213 if (!pex_get_status (pex
, 1, &status
))
214 fatal_perror ("can't get program status");
219 if (WIFSIGNALED (status
))
221 int sig
= WTERMSIG (status
);
222 if (WCOREDUMP (status
))
223 fatal ("%s terminated with signal %d [%s], core dumped",
224 prog
, sig
, strsignal (sig
));
226 fatal ("%s terminated with signal %d [%s]",
227 prog
, sig
, strsignal (sig
));
230 if (WIFEXITED (status
))
231 fatal ("%s returned %d exit status", prog
, WEXITSTATUS (status
));
238 /* Unlink a temporary LTRANS file unless requested otherwise. */
241 maybe_unlink_file (const char *file
)
245 if (unlink_if_ordinary (file
)
247 fatal_perror ("deleting LTRANS file %s", file
);
250 fprintf (stderr
, "[Leaving LTRANS %s]\n", file
);
254 /* Execute program ARGV[0] with arguments ARGV. Wait for it to finish. */
257 fork_execute (char **argv
)
265 args_name
= make_temp_file (".args");
266 at_args
= concat ("@", args_name
, NULL
);
267 args
= fopen (args_name
, "w");
269 fatal ("failed to open %s", args_name
);
271 status
= writeargv (&argv
[1], args
);
274 fatal ("could not write to temporary file %s", args_name
);
278 new_argv
[0] = argv
[0];
279 new_argv
[1] = at_args
;
282 pex
= collect_execute (new_argv
);
283 collect_wait (new_argv
[0], pex
);
285 maybe_unlink_file (args_name
);
290 /* Template of LTRANS dumpbase suffix. */
291 #define DUMPBASE_SUFFIX ".ltrans18446744073709551615"
293 /* Create decoded options from the COLLECT_GCC and COLLECT_GCC_OPTIONS
294 environment according to LANG_MASK. */
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
)
303 struct obstack argv_obstack
;
308 argv_storage
= xstrdup (collect_gcc_options
);
309 obstack_init (&argv_obstack
);
310 obstack_ptr_grow (&argv_obstack
, collect_gcc
);
312 for (j
= 0, k
= 0; argv_storage
[j
] != '\0'; ++j
)
314 if (argv_storage
[j
] == '\'')
316 obstack_ptr_grow (&argv_obstack
, &argv_storage
[k
]);
320 if (argv_storage
[j
] == '\0')
321 fatal ("malformed COLLECT_GCC_OPTIONS");
322 else if (strncmp (&argv_storage
[j
], "'\\''", 4) == 0)
324 argv_storage
[k
++] = '\'';
327 else if (argv_storage
[j
] == '\'')
330 argv_storage
[k
++] = argv_storage
[j
++];
333 argv_storage
[k
++] = '\0';
337 obstack_ptr_grow (&argv_obstack
, NULL
);
338 argc
= obstack_object_size (&argv_obstack
) / sizeof (void *) - 1;
339 argv
= XOBFINISH (&argv_obstack
, const char **);
341 decode_cmdline_options_to_array (argc
, (const char **)argv
,
343 decoded_options
, decoded_options_count
);
344 obstack_free (&argv_obstack
, NULL
);
347 /* Append OPTION to the options array DECODED_OPTIONS with size
348 DECODED_OPTIONS_COUNT. */
351 append_option (struct cl_decoded_option
**decoded_options
,
352 unsigned int *decoded_options_count
,
353 struct cl_decoded_option
*option
)
355 ++*decoded_options_count
;
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
));
365 /* Try to merge and complain about options FDECODED_OPTIONS when applied
366 ontop of DECODED_OPTIONS. */
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
)
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. */
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
)
393 struct cl_decoded_option
*foption
= &fdecoded_options
[i
];
394 switch (foption
->opt_index
)
396 case OPT_SPECIAL_unknown
:
397 case OPT_SPECIAL_ignore
:
398 case OPT_SPECIAL_program_name
:
399 case OPT_SPECIAL_input_file
:
403 if (!(cl_options
[foption
->opt_index
].flags
& CL_TARGET
))
411 case OPT_fexceptions
:
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
)
420 if (j
== *decoded_options_count
)
421 append_option (decoded_options
, decoded_options_count
, foption
);
427 /* Execute gcc. ARGC is the number of arguments. ARGV contains the arguments. */
430 run_gcc (unsigned argc
, char *argv
[])
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
;
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
;
448 /* Get the driver and options. */
449 collect_gcc
= getenv ("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
,
458 &decoded_options_count
);
460 /* Look at saved options in the IL files. */
461 for (i
= 1; i
< argc
; ++i
)
468 off_t file_offset
= 0, offset
, length
;
470 simple_object_read
*sobj
;
472 struct cl_decoded_option
*f2decoded_options
;
473 unsigned int f2decoded_options_count
;
474 char *filename
= argv
[i
];
475 if ((p
= strrchr (argv
[i
], '@'))
477 && sscanf (p
, "@%li%n", &loffset
, &consumed
) >= 1
478 && strlen (p
) == (unsigned int) consumed
)
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
;
485 fd
= open (argv
[i
], O_RDONLY
);
488 sobj
= simple_object_start_read (fd
, file_offset
, "__GNU_LTO",
495 if (!simple_object_find_section (sobj
, LTO_SECTION_NAME_PREFIX
"." "opts",
496 &offset
, &length
, &errmsg
, &err
))
498 simple_object_release_read (sobj
);
502 lseek (fd
, file_offset
+ offset
, SEEK_SET
);
503 data
= (char *)xmalloc (length
);
504 read (fd
, data
, length
);
508 get_options_from_collect_gcc_options (collect_gcc
,
511 &f2decoded_options_count
);
512 if (!fdecoded_options
)
514 fdecoded_options
= f2decoded_options
;
515 fdecoded_options_count
= f2decoded_options_count
;
518 merge_and_complain (&fdecoded_options
,
519 &fdecoded_options_count
,
520 f2decoded_options
, f2decoded_options_count
);
522 fopts
+= strlen (fopts
) + 1;
524 while (fopts
- data
< length
);
527 simple_object_release_read (sobj
);
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");
537 /* Append compiler driver arguments as far as they were merged. */
538 for (j
= 1; j
< fdecoded_options_count
; ++j
)
540 struct cl_decoded_option
*option
= &fdecoded_options
[j
];
542 /* File options have been properly filtered by lto-opts.c. */
543 switch (option
->opt_index
)
545 /* Drop arguments that we want to take from the link line. */
548 case OPT_flto_partition_none
:
549 case OPT_flto_partition_1to1
:
550 case OPT_flto_partition_balanced
:
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
)
565 case OPT_fexceptions
:
570 if (!(cl_options
[option
->opt_index
].flags
& CL_TARGET
))
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
]);
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
)
583 struct cl_decoded_option
*option
= &decoded_options
[j
];
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
)))
590 switch (option
->opt_index
)
593 linker_output
= option
->arg
;
594 /* We generate new intermediate output, drop this arg. */
605 case OPT_flto_partition_none
:
610 if (strcmp (option
->arg
, "jobserver") == 0)
617 parallel
= atoi (option
->arg
);
624 lto_mode
= LTO_MODE_WHOPR
;
625 /* We've handled these LTO options, do not pass them on. */
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
]);
639 lto_mode
= LTO_MODE_LTO
;
646 char *output_dir
, *base
, *name
;
647 bool bit_bucket
= strcmp (linker_output
, HOST_BIT_BUCKET
) == 0;
649 output_dir
= xstrdup (linker_output
);
651 for (name
= base
; *name
; name
++)
652 if (IS_DIR_SEPARATOR (*name
))
656 linker_output
= &linker_output
[base
- output_dir
];
657 if (*output_dir
== '\0')
659 static char current_dir
[] = { '.', DIR_SEPARATOR
, '\0' };
660 output_dir
= current_dir
;
664 obstack_ptr_grow (&argv_obstack
, "-dumpdir");
665 obstack_ptr_grow (&argv_obstack
, output_dir
);
668 obstack_ptr_grow (&argv_obstack
, "-dumpbase");
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 *);
674 if (lto_mode
== LTO_MODE_LTO
)
676 flto_out
= make_temp_file (".lto.o");
678 obstack_ptr_grow (&argv_obstack
, linker_output
);
679 obstack_ptr_grow (&argv_obstack
, "-o");
680 obstack_ptr_grow (&argv_obstack
, flto_out
);
684 const char *list_option
= "-fltrans-output-list=";
685 size_t list_option_len
= strlen (list_option
);
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
);
697 if (linker_output
&& debug
)
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");
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
;
710 obstack_ptr_grow (&argv_obstack
, tmp
);
711 strcpy (tmp
, list_option
);
712 tmp
+= list_option_len
;
713 strcpy (tmp
, ltrans_output_file
);
715 obstack_ptr_grow (&argv_obstack
, "-fwpa");
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
);
723 new_argv
= XOBFINISH (&argv_obstack
, const char **);
724 argv_ptr
= &new_argv
[new_head_argc
];
725 fork_execute (CONST_CAST (char **, new_argv
));
727 if (lto_mode
== LTO_MODE_LTO
)
729 printf("%s\n", flto_out
);
735 FILE *stream
= fopen (ltrans_output_file
, "r");
736 FILE *mstream
= NULL
;
737 struct obstack env_obstack
;
740 fatal_perror ("fopen: %s", ltrans_output_file
);
742 /* Parse the list of LTRANS inputs from the WPA stage. */
743 obstack_init (&env_obstack
);
747 const unsigned piece
= 32;
748 char *output_name
= NULL
;
749 char *buf
, *input_name
= (char *)xmalloc (piece
);
754 if (!fgets (buf
, piece
, stream
))
756 len
= strlen (input_name
);
757 if (input_name
[len
- 1] != '\n')
759 input_name
= (char *)xrealloc (input_name
, len
+ piece
);
760 buf
= input_name
+ len
;
763 input_name
[len
- 1] = '\0';
765 if (input_name
[0] == '*')
766 output_name
= &input_name
[1];
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
;
775 maybe_unlink_file (ltrans_output_file
);
776 ltrans_output_file
= NULL
;
780 makefile
= make_temp_file (".mk");
781 mstream
= fopen (makefile
, "w");
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
)
789 char *input_name
= input_names
[i
];
790 /* If it's a pass-through file do nothing. */
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 *);
800 /* Adjust the dumpbase if the linker output file was seen. */
804 = (char *) xmalloc (strlen (linker_output
)
805 + sizeof(DUMPBASE_SUFFIX
) + 1);
807 strlen (linker_output
) + sizeof(DUMPBASE_SUFFIX
),
808 "%s.ltrans%u", linker_output
, i
);
809 argv_ptr
[0] = dumpbase
;
812 argv_ptr
[1] = "-fltrans";
814 argv_ptr
[3] = output_name
;
815 argv_ptr
[4] = input_name
;
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. */
827 fprintf (mstream
, "\t@-touch -r %s %s.tem > /dev/null 2>&1 "
829 input_name
, input_name
, input_name
, input_name
);
833 fork_execute (CONST_CAST (char **, new_argv
));
834 maybe_unlink_file (input_name
);
837 output_names
[i
] = output_name
;
844 fprintf (mstream
, "all:");
845 for (i
= 0; i
< nr
; ++i
)
846 fprintf (mstream
, " \\\n\t%s", output_names
[i
]);
847 fprintf (mstream
, "\n");
851 /* Avoid passing --jobserver-fd= and similar flags
852 unless jobserver mode is explicitly enabled. */
853 putenv (xstrdup ("MAKEFLAGS="));
854 putenv (xstrdup ("MFLAGS="));
856 new_argv
[0] = getenv ("MAKE");
858 new_argv
[0] = "make";
860 new_argv
[2] = makefile
;
864 snprintf (jobs
, 31, "-j%d", parallel
);
865 new_argv
[i
++] = jobs
;
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
);
873 for (i
= 0; i
< nr
; ++i
)
874 maybe_unlink_file (input_names
[i
]);
876 for (i
= 0; i
< nr
; ++i
)
878 fputs (output_names
[i
], stdout
);
880 free (input_names
[i
]);
885 free (list_option_full
);
886 obstack_free (&env_obstack
, NULL
);
889 obstack_free (&argv_obstack
, NULL
);
896 main (int argc
, char *argv
[])
900 p
= argv
[0] + strlen (argv
[0]);
901 while (p
!= argv
[0] && !IS_DIR_SEPARATOR (p
[-1]))
905 xmalloc_set_program_name (progname
);
909 diagnostic_initialize (global_dc
, 0);
911 if (signal (SIGINT
, SIG_IGN
) != SIG_IGN
)
912 signal (SIGINT
, fatal_signal
);
914 if (signal (SIGHUP
, SIG_IGN
) != SIG_IGN
)
915 signal (SIGHUP
, fatal_signal
);
917 if (signal (SIGTERM
, SIG_IGN
) != SIG_IGN
)
918 signal (SIGTERM
, fatal_signal
);
920 if (signal (SIGPIPE
, SIG_IGN
) != SIG_IGN
)
921 signal (SIGPIPE
, fatal_signal
);
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
);
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
);
933 run_gcc (argc
, argv
);