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,
5 Free Software Foundation, Inc.
7 This file is part of GCC.
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
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
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/>. */
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.
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". */
35 #include "coretypes.h"
36 #include "multilib.h" /* before tm.h */
39 #if ! defined( SIGCHLD ) && defined( SIGCLD )
40 # define SIGCHLD SIGCLD
47 #include "diagnostic.h"
53 # include <sys/mman.h>
55 /* This is on Solaris. */
56 # include <sys/types.h>
61 # define MAP_FAILED ((void *)-1)
64 /* By default there is no special suffix for target executables. */
65 /* FIXME: when autoconf is fixed, remove the host check - dj */
66 #if defined(TARGET_EXECUTABLE_SUFFIX) && defined(HOST_EXECUTABLE_SUFFIX)
67 #define HAVE_TARGET_EXECUTABLE_SUFFIX
70 /* By default there is no special suffix for host executables. */
71 #ifdef HOST_EXECUTABLE_SUFFIX
72 #define HAVE_HOST_EXECUTABLE_SUFFIX
74 #define HOST_EXECUTABLE_SUFFIX ""
77 /* By default, the suffix for target object files is ".o". */
78 #ifdef TARGET_OBJECT_SUFFIX
79 #define HAVE_TARGET_OBJECT_SUFFIX
81 #define TARGET_OBJECT_SUFFIX ".o"
84 static const char dir_separator_str[] = { DIR_SEPARATOR, 0 };
86 /* Most every one is fine with LIBRARY_PATH. For some, it conflicts. */
87 #ifndef LIBRARY_PATH_ENV
88 #define LIBRARY_PATH_ENV "LIBRARY_PATH"
92 #define kill(p,s) raise(s)
95 /* If a stage of compilation returns an exit status >= 1,
96 compilation of that file ceases. */
98 #define MIN_FATAL_STATUS 1
100 /* Flag set by cppspec.c to 1. */
103 /* Flag set to nonzero if an @file argument has been supplied to gcc. */
104 static bool at_file_supplied;
106 /* Definition of string containing the arguments given to configure. */
107 #include "configargs.h"
109 /* Flag saying to print the command line options understood by gcc and its
112 static int print_help_list;
114 /* Flag saying to print the version of gcc and its sub-processes. */
116 static int print_version;
118 /* Flag indicating whether we should ONLY print the command and
119 arguments (like verbose_flag) without executing the command.
120 Displayed arguments are quoted so that the generated command
121 line is suitable for execution. This is intended for use in
122 shell scripts to capture the driver-generated command line. */
123 static int verbose_only_flag;
125 /* Flag indicating how to print command line options of sub-processes. */
127 static int print_subprocess_help;
129 /* Whether we should report subprocess execution times to a file. */
131 FILE *report_times_to_file = NULL;
133 /* Nonzero means place this string before uses of /, so that include
134 and library files can be found in an alternate location. */
136 #ifdef TARGET_SYSTEM_ROOT
137 static const char *target_system_root = TARGET_SYSTEM_ROOT;
139 static const char *target_system_root = 0;
142 /* Nonzero means pass the updated target_system_root to the compiler. */
144 static int target_system_root_changed;
146 /* Nonzero means append this string to target_system_root. */
148 static const char *target_sysroot_suffix = 0;
150 /* Nonzero means append this string to target_system_root for headers. */
152 static const char *target_sysroot_hdrs_suffix = 0;
154 /* Nonzero means write "temp" files in source directory
155 and use the source file's name in them, and don't delete them. */
157 static enum save_temps {
158 SAVE_TEMPS_NONE, /* no -save-temps */
159 SAVE_TEMPS_CWD, /* -save-temps in current directory */
160 SAVE_TEMPS_OBJ /* -save-temps in object directory */
163 /* Output file to use to get the object directory for -save-temps=obj */
164 static char *save_temps_prefix = 0;
165 static size_t save_temps_length = 0;
167 /* The compiler version. */
169 static const char *compiler_version;
171 /* The target version. */
173 static const char *const spec_version = DEFAULT_TARGET_VERSION;
175 /* The target machine. */
177 static const char *spec_machine = DEFAULT_TARGET_MACHINE;
179 /* Nonzero if cross-compiling.
180 When -b is used, the value comes from the `specs' file. */
182 #ifdef CROSS_DIRECTORY_STRUCTURE
183 static const char *cross_compile = "1";
185 static const char *cross_compile = "0";
188 /* Greatest exit code of sub-processes that has been encountered up to
190 static int greatest_status = 1;
192 /* This is the obstack which we use to allocate many strings. */
194 static struct obstack obstack;
196 /* This is the obstack to build an environment variable to pass to
197 collect2 that describes all of the relevant switches of what to
198 pass the compiler in building the list of pointers to constructors
201 static struct obstack collect_obstack;
203 /* Forward declaration for prototypes. */
207 static void init_spec (void);
208 static void store_arg (const char *, int, int);
209 static void insert_wrapper (const char *);
210 static char *load_specs (const char *);
211 static void read_specs (const char *, int);
212 static void set_spec (const char *, const char *);
213 static struct compiler *lookup_compiler (const char *, size_t, const char *);
214 static char *build_search_list (const struct path_prefix *, const char *,
216 static void xputenv (const char *);
217 static void putenv_from_prefixes (const struct path_prefix *, const char *,
219 static int access_check (const char *, int);
220 static char *find_a_file (const struct path_prefix *, const char *, int, bool);
221 static void add_prefix (struct path_prefix *, const char *, const char *,
223 static void add_sysrooted_prefix (struct path_prefix *, const char *,
224 const char *, int, int, int);
225 static char *skip_whitespace (char *);
226 static void delete_if_ordinary (const char *);
227 static void delete_temp_files (void);
228 static void delete_failure_queue (void);
229 static void clear_failure_queue (void);
230 static int check_live_switch (int, int);
231 static const char *handle_braces (const char *);
232 static inline bool input_suffix_matches (const char *, const char *);
233 static inline bool switch_matches (const char *, const char *, int);
234 static inline void mark_matching_switches (const char *, const char *, int);
235 static inline void process_marked_switches (void);
236 static const char *process_brace_body (const char *, const char *, const char *, int, int);
237 static const struct spec_function *lookup_spec_function (const char *);
238 static const char *eval_spec_function (const char *, const char *);
239 static const char *handle_spec_function (const char *);
240 static char *save_string (const char *, int);
241 static void set_collect_gcc_options (void);
242 static int do_spec_1 (const char *, int, const char *);
243 static int do_spec_2 (const char *);
244 static void do_option_spec (const char *, const char *);
245 static void do_self_spec (const char *);
246 static const char *find_file (const char *);
247 static int is_directory (const char *, bool);
248 static const char *validate_switches (const char *);
249 static void validate_all_switches (void);
250 static inline void validate_switches_from_spec (const char *);
251 static void give_switch (int, int);
252 static int used_arg (const char *, int);
253 static int default_arg (const char *, int);
254 static void set_multilib_dir (void);
255 static void print_multilib_info (void);
256 static void perror_with_name (const char *);
257 static void display_help (void);
258 static void add_preprocessor_option (const char *, int);
259 static void add_assembler_option (const char *, int);
260 static void add_linker_option (const char *, int);
261 static void process_command (unsigned int, struct cl_decoded_option *);
262 static int execute (void);
263 static void alloc_args (void);
264 static void clear_args (void);
265 static void fatal_signal (int);
266 #if defined(ENABLE_SHARED_LIBGCC) && !defined(REAL_LIBGCC_SPEC)
267 static void init_gcc_specs (struct obstack *, const char *, const char *,
270 #if defined(HAVE_TARGET_OBJECT_SUFFIX) || defined(HAVE_TARGET_EXECUTABLE_SUFFIX)
271 static const char *convert_filename (const char *, int, int);
274 static const char *getenv_spec_function (int, const char **);
275 static const char *if_exists_spec_function (int, const char **);
276 static const char *if_exists_else_spec_function (int, const char **);
277 static const char *replace_outfile_spec_function (int, const char **);
278 static const char *remove_outfile_spec_function (int, const char **);
279 static const char *version_compare_spec_function (int, const char **);
280 static const char *include_spec_function (int, const char **);
281 static const char *find_file_spec_function (int, const char **);
282 static const char *find_plugindir_spec_function (int, const char **);
283 static const char *print_asm_header_spec_function (int, const char **);
284 static const char *compare_debug_dump_opt_spec_function (int, const char **);
285 static const char *compare_debug_self_opt_spec_function (int, const char **);
286 static const char *compare_debug_auxbase_opt_spec_function (int, const char **);
288 /* The Specs Language
290 Specs are strings containing lines, each of which (if not blank)
291 is made up of a program name, and arguments separated by spaces.
292 The program name must be exact and start from root, since no path
293 is searched and it is unreliable to depend on the current working directory.
294 Redirection of input or output is not supported; the subprograms must
295 accept filenames saying what files to read and write.
297 In addition, the specs can contain %-sequences to substitute variable text
298 or for conditional text. Here is a table of all defined %-sequences.
299 Note that spaces are not generated automatically around the results of
300 expanding these sequences; therefore, you can concatenate them together
301 or with constant text in a single argument.
303 %% substitute one % into the program name or argument.
304 %i substitute the name of the input file being processed.
305 %b substitute the basename of the input file being processed.
306 This is the substring up to (and not including) the last period
307 and not including the directory unless -save-temps was specified
308 to put temporaries in a different location.
309 %B same as %b, but include the file suffix (text after the last period).
311 substitute a file name that has suffix SUFFIX and is chosen
312 once per compilation, and mark the argument a la %d. To reduce
313 exposure to denial-of-service attacks, the file name is now
314 chosen in a way that is hard to predict even when previously
315 chosen file names are known. For example, `%g.s ... %g.o ... %g.s'
316 might turn into `ccUVUUAU.s ccXYAXZ12.o ccUVUUAU.s'. SUFFIX matches
317 the regexp "[.0-9A-Za-z]*%O"; "%O" is treated exactly as if it
318 had been pre-processed. Previously, %g was simply substituted
319 with a file name chosen once per compilation, without regard
320 to any appended suffix (which was therefore treated just like
321 ordinary text), making such attacks more likely to succeed.
323 like %g, but if -pipe is in effect, expands simply to "-".
325 like %g, but if -pipe is in effect, expands to nothing. (We have both
326 %| and %m to accommodate differences between system assemblers; see
327 the AS_NEEDS_DASH_FOR_PIPED_INPUT target macro.)
329 like %g, but generates a new temporary file name even if %uSUFFIX
332 substitutes the last file name generated with %uSUFFIX, generating a
333 new one if there is no such last file name. In the absence of any
334 %uSUFFIX, this is just like %gSUFFIX, except they don't share
335 the same suffix "space", so `%g.s ... %U.s ... %g.s ... %U.s'
336 would involve the generation of two distinct file names, one
337 for each `%g.s' and another for each `%U.s'. Previously, %U was
338 simply substituted with a file name chosen for the previous %u,
339 without regard to any appended suffix.
341 substitutes the name of the HOST_BIT_BUCKET, if any, and if it is
342 writable, and if save-temps is off; otherwise, substitute the name
343 of a temporary file, just like %u. This temporary file is not
344 meant for communication between processes, but rather as a junk
347 substitutes .SUFFIX for the suffixes of a matched switch's args when
348 it is subsequently output with %*. SUFFIX is terminated by the next
350 %d marks the argument containing or following the %d as a
351 temporary file name, so that that file will be deleted if GCC exits
352 successfully. Unlike %g, this contributes no text to the argument.
353 %w marks the argument containing or following the %w as the
354 "output file" of this compilation. This puts the argument
355 into the sequence of arguments that %o will substitute later.
356 %V indicates that this compilation produces no "output file".
358 like %{...} but mark last argument supplied within
359 as a file to be deleted on failure.
360 %o substitutes the names of all the output files, with spaces
361 automatically placed around them. You should write spaces
362 around the %o as well or the results are undefined.
363 %o is for use in the specs for running the linker.
364 Input files whose names have no recognized suffix are not compiled
365 at all, but they are included among the output files, so they will
367 %O substitutes the suffix for object files. Note that this is
368 handled specially when it immediately follows %g, %u, or %U
369 (with or without a suffix argument) because of the need for
370 those to form complete file names. The handling is such that
371 %O is treated exactly as if it had already been substituted,
372 except that %g, %u, and %U do not currently support additional
373 SUFFIX characters following %O as they would following, for
375 %I Substitute any of -iprefix (made from GCC_EXEC_PREFIX), -isysroot
376 (made from TARGET_SYSTEM_ROOT), -isystem (made from COMPILER_PATH
377 and -B options) and -imultilib as necessary.
378 %s current argument is the name of a library or startup file of some sort.
379 Search for that file in a standard list of directories
380 and substitute the full name found.
381 %eSTR Print STR as an error message. STR is terminated by a newline.
382 Use this when inconsistent options are detected.
383 %nSTR Print STR as a notice. STR is terminated by a newline.
384 %x{OPTION} Accumulate an option for %X.
385 %X Output the accumulated linker options specified by compilations.
386 %Y Output the accumulated assembler options specified by compilations.
387 %Z Output the accumulated preprocessor options specified by compilations.
388 %a process ASM_SPEC as a spec.
389 This allows config.h to specify part of the spec for running as.
390 %A process ASM_FINAL_SPEC as a spec. A capital A is actually
391 used here. This can be used to run a post-processor after the
392 assembler has done its job.
393 %D Dump out a -L option for each directory in startfile_prefixes.
394 If multilib_dir is set, extra entries are generated with it affixed.
395 %l process LINK_SPEC as a spec.
396 %L process LIB_SPEC as a spec.
397 %G process LIBGCC_SPEC as a spec.
398 %R Output the concatenation of target_system_root and
399 target_sysroot_suffix.
400 %S process STARTFILE_SPEC as a spec. A capital S is actually used here.
401 %E process ENDFILE_SPEC as a spec. A capital E is actually used here.
402 %C process CPP_SPEC as a spec.
403 %1 process CC1_SPEC as a spec.
404 %2 process CC1PLUS_SPEC as a spec.
405 %* substitute the variable part of a matched option. (See below.)
406 Note that each comma in the substituted string is replaced by
408 %<S remove all occurrences of -S from the command line.
409 Note - this command is position dependent. % commands in the
410 spec string before this one will see -S, % commands in the
411 spec string after this one will not.
412 %<S* remove all occurrences of all switches beginning with -S from the
415 Call the named function FUNCTION, passing it ARGS. ARGS is
416 first processed as a nested spec string, then split into an
417 argument vector in the usual fashion. The function returns
418 a string which is processed as if it had appeared literally
419 as part of the current spec.
420 %{S} substitutes the -S switch, if that switch was given to GCC.
421 If that switch was not specified, this substitutes nothing.
422 Here S is a metasyntactic variable.
423 %{S*} substitutes all the switches specified to GCC whose names start
424 with -S. This is used for -o, -I, etc; switches that take
425 arguments. GCC considers `-o foo' as being one switch whose
426 name starts with `o'. %{o*} would substitute this text,
427 including the space; thus, two arguments would be generated.
428 %{S*&T*} likewise, but preserve order of S and T options (the order
429 of S and T in the spec is not significant). Can be any number
430 of ampersand-separated variables; for each the wild card is
431 optional. Useful for CPP as %{D*&U*&A*}.
433 %{S:X} substitutes X, if the -S switch was given to GCC.
434 %{!S:X} substitutes X, if the -S switch was NOT given to GCC.
435 %{S*:X} substitutes X if one or more switches whose names start
436 with -S was given to GCC. Normally X is substituted only
437 once, no matter how many such switches appeared. However,
438 if %* appears somewhere in X, then X will be substituted
439 once for each matching switch, with the %* replaced by the
440 part of that switch that matched the '*'.
441 %{.S:X} substitutes X, if processing a file with suffix S.
442 %{!.S:X} substitutes X, if NOT processing a file with suffix S.
443 %{,S:X} substitutes X, if processing a file which will use spec S.
444 %{!,S:X} substitutes X, if NOT processing a file which will use spec S.
446 %{S|T:X} substitutes X if either -S or -T was given to GCC. This may be
447 combined with '!', '.', ',', and '*' as above binding stronger
449 If %* appears in X, all of the alternatives must be starred, and
450 only the first matching alternative is substituted.
451 %{S:X; if S was given to GCC, substitutes X;
452 T:Y; else if T was given to GCC, substitutes Y;
453 :D} else substitutes D. There can be as many clauses as you need.
454 This may be combined with '.', '!', ',', '|', and '*' as above.
456 %(Spec) processes a specification defined in a specs file as *Spec:
457 %[Spec] as above, but put __ around -D arguments
459 The conditional text X in a %{S:X} or similar construct may contain
460 other nested % constructs or spaces, or even newlines. They are
461 processed as usual, as described above. Trailing white space in X is
462 ignored. White space may also appear anywhere on the left side of the
463 colon in these constructs, except between . or * and the corresponding
466 The -O, -f, -m, and -W switches are handled specifically in these
467 constructs. If another value of -O or the negated form of a -f, -m, or
468 -W switch is found later in the command line, the earlier switch
469 value is ignored, except with {S*} where S is just one letter; this
470 passes all matching options.
472 The character | at the beginning of the predicate text is used to indicate
473 that a command should be piped to the following command, but only if -pipe
476 Note that it is built into GCC which switches take arguments and which
477 do not. You might think it would be useful to generalize this to
478 allow each compiler's spec to say which switches take arguments. But
479 this cannot be done in a consistent fashion. GCC cannot even decide
480 which input files have been specified without knowing which switches
481 take arguments, and it must know which input files to compile in order
482 to tell which compilers to run.
484 GCC also knows implicitly that arguments starting in `-l' are to be
485 treated as compiler output files, and passed to the linker in their
486 proper position among the other output files. */
488 /* Define the macros used for specs %a, %l, %L, %S, %C, %1. */
490 /* config.h can define ASM_SPEC to provide extra args to the assembler
491 or extra switch-translations. */
496 /* config.h can define ASM_FINAL_SPEC to run a post processor after
497 the assembler has run. */
498 #ifndef ASM_FINAL_SPEC
499 #define ASM_FINAL_SPEC ""
502 /* config.h can define CPP_SPEC to provide extra args to the C preprocessor
503 or extra switch-translations. */
508 /* config.h can define CC1_SPEC to provide extra args to cc1 and cc1plus
509 or extra switch-translations. */
514 /* config.h can define CC1PLUS_SPEC to provide extra args to cc1plus
515 or extra switch-translations. */
517 #define CC1PLUS_SPEC ""
520 /* config.h can define LINK_SPEC to provide extra args to the linker
521 or extra switch-translations. */
526 /* config.h can define LIB_SPEC to override the default libraries. */
528 #define LIB_SPEC "%{!shared:%{g*:-lg} %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}}"
533 /* XXX: valid only for GNU ld */
534 /* XXX: should exactly match hooks provided by libmudflap.a */
535 #define MFWRAP_SPEC " %{static: %{fmudflap|fmudflapth: \
536 --wrap=malloc --wrap=free --wrap=calloc --wrap=realloc\
537 --wrap=mmap --wrap=munmap --wrap=alloca\
538 } %{fmudflapth: --wrap=pthread_create\
539 }} %{fmudflap|fmudflapth: --wrap=main}"
542 #define MFLIB_SPEC "%{fmudflap|fmudflapth: -export-dynamic}"
545 /* When using -fsplit-stack we need to wrap pthread_create, in order
546 to initialize the stack guard. We always use wrapping, rather than
547 shared library ordering, and we keep the wrapper function in
548 libgcc. This is not yet a real spec, though it could become one;
549 it is currently just stuffed into LINK_SPEC. FIXME: This wrapping
550 only works with GNU ld and gold. FIXME: This is incompatible with
551 -fmudflap when linking statically, which wants to do its own
553 #define STACK_SPLIT_SPEC " %{fsplit-stack: --wrap=pthread_create}"
555 /* config.h can define LIBGCC_SPEC to override how and when libgcc.a is
558 #if defined(REAL_LIBGCC_SPEC)
559 #define LIBGCC_SPEC REAL_LIBGCC_SPEC
560 #elif defined(LINK_LIBGCC_SPECIAL_1)
561 /* Have gcc do the search for libgcc.a. */
562 #define LIBGCC_SPEC "libgcc.a%s"
564 #define LIBGCC_SPEC "-lgcc"
568 /* config.h can define STARTFILE_SPEC to override the default crt0 files. */
569 #ifndef STARTFILE_SPEC
570 #define STARTFILE_SPEC \
571 "%{!shared:%{pg:gcrt0%O%s}%{!pg:%{p:mcrt0%O%s}%{!p:crt0%O%s}}}"
574 /* config.h can define ENDFILE_SPEC to override the default crtn files. */
576 #define ENDFILE_SPEC ""
580 #define LINKER_NAME "collect2"
583 #ifdef HAVE_AS_DEBUG_PREFIX_MAP
584 #define ASM_MAP " %{fdebug-prefix-map=*:--debug-prefix-map %*}"
589 /* Define ASM_DEBUG_SPEC to be a spec suitable for translating '-g'
591 #ifndef ASM_DEBUG_SPEC
592 # if defined(DBX_DEBUGGING_INFO) && defined(DWARF2_DEBUGGING_INFO) \
593 && defined(HAVE_AS_GDWARF2_DEBUG_FLAG) && defined(HAVE_AS_GSTABS_DEBUG_FLAG)
594 # define ASM_DEBUG_SPEC \
595 (PREFERRED_DEBUGGING_TYPE == DBX_DEBUG \
596 ? "%{!g0:%{gdwarf-2*:--gdwarf2}%{!gdwarf-2*:%{g*:--gstabs}}}" ASM_MAP \
597 : "%{!g0:%{gstabs*:--gstabs}%{!gstabs*:%{g*:--gdwarf2}}}" ASM_MAP)
599 # if defined(DBX_DEBUGGING_INFO) && defined(HAVE_AS_GSTABS_DEBUG_FLAG)
600 # define ASM_DEBUG_SPEC "%{g*:%{!g0:--gstabs}}" ASM_MAP
602 # if defined(DWARF2_DEBUGGING_INFO) && defined(HAVE_AS_GDWARF2_DEBUG_FLAG)
603 # define ASM_DEBUG_SPEC "%{g*:%{!g0:--gdwarf2}}" ASM_MAP
607 #ifndef ASM_DEBUG_SPEC
608 # define ASM_DEBUG_SPEC ""
611 /* Here is the spec for running the linker, after compiling all files. */
613 /* This is overridable by the target in case they need to specify the
614 -lgcc and -lc order specially, yet not require them to override all
615 of LINK_COMMAND_SPEC. */
616 #ifndef LINK_GCC_C_SEQUENCE_SPEC
617 #define LINK_GCC_C_SEQUENCE_SPEC "%G %L %G"
620 #ifndef LINK_SSP_SPEC
621 #ifdef TARGET_LIBC_PROVIDES_SSP
622 #define LINK_SSP_SPEC "%{fstack-protector:}"
624 #define LINK_SSP_SPEC "%{fstack-protector|fstack-protector-all:-lssp_nonshared -lssp}"
628 #ifndef LINK_PIE_SPEC
630 #define LINK_PIE_SPEC "%{pie:-pie} "
632 #define LINK_PIE_SPEC "%{pie:} "
636 #ifndef LINK_BUILDID_SPEC
637 # if defined(HAVE_LD_BUILDID) && defined(ENABLE_LD_BUILDID)
638 # define LINK_BUILDID_SPEC "%{!r:--build-id} "
643 /* -u* was put back because both BSD and SysV seem to support it. */
644 /* %{static:} simply prevents an error message if the target machine
645 doesn't handle -static. */
646 /* We want %{T*} after %{L*} and %D so that it can be used to specify linker
647 scripts which exist in user specified directories, or in standard
649 /* We pass any -flto flags on to the linker, which is expected
650 to understand them. In practice, this means it had better be collect2. */
651 #ifndef LINK_COMMAND_SPEC
652 #define LINK_COMMAND_SPEC "\
653 %{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
655 %{fuse-linker-plugin: \
656 -plugin %(linker_plugin_file) \
657 -plugin-opt=%(lto_wrapper) \
658 -plugin-opt=-fresolution=%u.res \
659 %{static|static-libgcc:-plugin-opt=-pass-through=%(lto_libgcc)} \
660 %{static:-plugin-opt=-pass-through=-lc} \
662 %{flto*:%<fcompare-debug*} \
663 %{flto*} %l " LINK_PIE_SPEC \
664 "%X %{o*} %{A} %{d} %{e*} %{m} %{N} %{n} %{r}\
665 %{s} %{t} %{u*} %{z} %{Z} %{!A:%{!nostdlib:%{!nostartfiles:%S}}}\
666 %{static:} %{L*} %(mfwrap) %(link_libgcc) %o\
667 %{fopenmp|ftree-parallelize-loops=*:%:include(libgomp.spec)%(link_gomp)}\
668 %(mflib) " STACK_SPLIT_SPEC "\
669 %{fprofile-arcs|fprofile-generate*|coverage:-lgcov}\
670 %{!nostdlib:%{!nodefaultlibs:%(link_ssp) %(link_gcc_c_sequence)}}\
671 %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} }}}}}}"
674 #ifndef LINK_LIBGCC_SPEC
675 /* Generate -L options for startfile prefix list. */
676 # define LINK_LIBGCC_SPEC "%D"
679 #ifndef STARTFILE_PREFIX_SPEC
680 # define STARTFILE_PREFIX_SPEC ""
684 # define SYSROOT_SPEC "--sysroot=%R"
687 #ifndef SYSROOT_SUFFIX_SPEC
688 # define SYSROOT_SUFFIX_SPEC ""
691 #ifndef SYSROOT_HEADERS_SUFFIX_SPEC
692 # define SYSROOT_HEADERS_SUFFIX_SPEC ""
695 static const char *asm_debug;
696 static const char *cpp_spec = CPP_SPEC;
697 static const char *cc1_spec = CC1_SPEC;
698 static const char *cc1plus_spec = CC1PLUS_SPEC;
699 static const char *link_gcc_c_sequence_spec = LINK_GCC_C_SEQUENCE_SPEC;
700 static const char *link_ssp_spec = LINK_SSP_SPEC;
701 static const char *asm_spec = ASM_SPEC;
702 static const char *asm_final_spec = ASM_FINAL_SPEC;
703 static const char *link_spec = LINK_SPEC;
704 static const char *lib_spec = LIB_SPEC;
705 static const char *mfwrap_spec = MFWRAP_SPEC;
706 static const char *mflib_spec = MFLIB_SPEC;
707 static const char *link_gomp_spec = "";
708 static const char *libgcc_spec = LIBGCC_SPEC;
709 static const char *endfile_spec = ENDFILE_SPEC;
710 static const char *startfile_spec = STARTFILE_SPEC;
711 static const char *linker_name_spec = LINKER_NAME;
712 static const char *linker_plugin_file_spec = "";
713 static const char *lto_wrapper_spec = "";
714 static const char *lto_gcc_spec = "";
715 static const char *lto_libgcc_spec = "";
716 static const char *link_command_spec = LINK_COMMAND_SPEC;
717 static const char *link_libgcc_spec = LINK_LIBGCC_SPEC;
718 static const char *startfile_prefix_spec = STARTFILE_PREFIX_SPEC;
719 static const char *sysroot_spec = SYSROOT_SPEC;
720 static const char *sysroot_suffix_spec = SYSROOT_SUFFIX_SPEC;
721 static const char *sysroot_hdrs_suffix_spec = SYSROOT_HEADERS_SUFFIX_SPEC;
723 /* Standard options to cpp, cc1, and as, to reduce duplication in specs.
724 There should be no need to override these in target dependent files,
725 but we need to copy them to the specs file so that newer versions
726 of the GCC driver can correctly drive older tool chains with the
727 appropriate -B options. */
729 /* When cpplib handles traditional preprocessing, get rid of this, and
730 call cc1 (or cc1obj in objc/lang-specs.h) from the main specs so
731 that we default the front end language better. */
732 static const char *trad_capable_cpp =
733 "cc1 -E %{traditional|ftraditional|traditional-cpp:-traditional-cpp}";
735 /* We don't wrap .d files in %W{} since a missing .d file, and
736 therefore no dependency entry, confuses make into thinking a .o
737 file that happens to exist is up-to-date. */
738 static const char *cpp_unique_options =
739 "%{!Q:-quiet} %{nostdinc*} %{C} %{CC} %{v} %{I*&F*} %{P} %I\
740 %{MD:-MD %{!o:%b.d}%{o*:%.d%*}}\
741 %{MMD:-MMD %{!o:%b.d}%{o*:%.d%*}}\
742 %{M} %{MM} %{MF*} %{MG} %{MP} %{MQ*} %{MT*}\
743 %{!E:%{!M:%{!MM:%{!MT:%{!MQ:%{MD|MMD:%{o*:-MQ %*}}}}}}}\
744 %{remap} %{g3|ggdb3|gstabs3|gcoff3|gxcoff3|gvms3:-dD}\
745 %{!iplugindir*:%{fplugin*:%:find-plugindir()}}\
746 %{H} %C %{D*&U*&A*} %{i*} %Z %i\
747 %{fmudflap:-D_MUDFLAP -include mf-runtime.h}\
748 %{fmudflapth:-D_MUDFLAP -D_MUDFLAPTH -include mf-runtime.h}\
751 /* This contains cpp options which are common with cc1_options and are passed
752 only when preprocessing only to avoid duplication. We pass the cc1 spec
753 options to the preprocessor so that it the cc1 spec may manipulate
754 options used to set target flags. Those special target flags settings may
755 in turn cause preprocessor symbols to be defined specially. */
756 static const char *cpp_options =
757 "%(cpp_unique_options) %1 %{m*} %{std*&ansi&trigraphs} %{W*&pedantic*} %{w}\
758 %{f*} %{g*:%{!g0:%{g*} %{!fno-working-directory:-fworking-directory}}} %{O*}\
759 %{undef} %{save-temps*:-fpch-preprocess}";
761 /* This contains cpp options which are not passed when the preprocessor
762 output will be used by another program. */
763 static const char *cpp_debug_options = "%{d*}";
765 /* NB: This is shared amongst all front-ends, except for Ada. */
766 static const char *cc1_options =
767 "%{pg:%{fomit-frame-pointer:%e-pg and -fomit-frame-pointer are incompatible}}\
768 %{!iplugindir*:%{fplugin*:%:find-plugindir()}}\
769 %1 %{!Q:-quiet} %{!dumpbase:-dumpbase %B} %{d*} %{m*} %{aux-info*}\
770 %{fcompare-debug-second:%:compare-debug-auxbase-opt(%b)} \
771 %{!fcompare-debug-second:%{c|S:%{o*:-auxbase-strip %*}%{!o*:-auxbase %b}}}%{!c:%{!S:-auxbase %b}} \
772 %{g*} %{O*} %{W*&pedantic*} %{w} %{std*&ansi&trigraphs}\
773 %{v:-version} %{pg:-p} %{p} %{f*} %{undef}\
774 %{Qn:-fno-ident} %{-help:--help}\
775 %{-target-help:--target-help}\
776 %{-version:--version}\
777 %{-help=*:--help=%*}\
778 %{!fsyntax-only:%{S:%W{o*}%{!o*:-o %b.s}}}\
779 %{fsyntax-only:-o %j} %{-param*}\
780 %{fmudflap|fmudflapth:-fno-builtin -fno-merge-constants}\
781 %{coverage:-fprofile-arcs -ftest-coverage}";
783 static const char *asm_options =
784 "%{--target-help:%:print-asm-header()} "
786 /* If GNU AS is used, then convert -w (no warnings), -I, and -v
787 to the assembler equivalents. */
788 "%{v} %{w:-W} %{I*} "
790 "%a %Y %{c:%W{o*}%{!o*:-o %w%b%O}}%{!c:-o %d%w%u%O}";
792 static const char *invoke_as =
793 #ifdef AS_NEEDS_DASH_FOR_PIPED_INPUT
795 %{fcompare-debug=*|fdump-final-insns=*:%:compare-debug-dump-opt()}\
796 %{!S:-o %|.s |\n as %(asm_options) %|.s %A }\
800 %{fcompare-debug=*|fdump-final-insns=*:%:compare-debug-dump-opt()}\
801 %{!S:-o %|.s |\n as %(asm_options) %m.s %A }\
805 /* Some compilers have limits on line lengths, and the multilib_select
806 and/or multilib_matches strings can be very long, so we build them at
808 static struct obstack multilib_obstack;
809 static const char *multilib_select;
810 static const char *multilib_matches;
811 static const char *multilib_defaults;
812 static const char *multilib_exclusions;
814 /* Check whether a particular argument is a default argument. */
816 #ifndef MULTILIB_DEFAULTS
817 #define MULTILIB_DEFAULTS { "" }
820 static const char *const multilib_defaults_raw[] = MULTILIB_DEFAULTS;
822 #ifndef DRIVER_SELF_SPECS
823 #define DRIVER_SELF_SPECS ""
826 /* Adding -fopenmp should imply pthreads. This is particularly important
827 for targets that use different start files and suchlike. */
828 #ifndef GOMP_SELF_SPECS
829 #define GOMP_SELF_SPECS "%{fopenmp|ftree-parallelize-loops=*: -pthread}"
832 static const char *const driver_self_specs[] = {
833 "%{fdump-final-insns:-fdump-final-insns=.} %<fdump-final-insns",
834 DRIVER_SELF_SPECS, CONFIGURE_SPECS, GOMP_SELF_SPECS
837 #ifndef OPTION_DEFAULT_SPECS
838 #define OPTION_DEFAULT_SPECS { "", "" }
847 static const struct default_spec
848 option_default_specs[] = { OPTION_DEFAULT_SPECS };
852 struct user_specs *next;
853 const char *filename;
856 static struct user_specs *user_specs_head, *user_specs_tail;
859 /* Record the mapping from file suffixes for compilation specs. */
863 const char *suffix; /* Use this compiler for input files
864 whose names end in this suffix. */
866 const char *spec; /* To use this compiler, run this spec. */
868 const char *cpp_spec; /* If non-NULL, substitute this spec
869 for `%C', rather than the usual
871 const int combinable; /* If nonzero, compiler can deal with
872 multiple source files at once (IMA). */
873 const int needs_preprocessing; /* If nonzero, source files need to
874 be run through a preprocessor. */
877 /* Pointer to a vector of `struct compiler' that gives the spec for
878 compiling a file, based on its suffix.
879 A file that does not end in any of these suffixes will be passed
880 unchanged to the loader and nothing else will be done to it.
882 An entry containing two 0s is used to terminate the vector.
884 If multiple entries match a file, the last matching one is used. */
886 static struct compiler *compilers;
888 /* Number of entries in `compilers', not counting the null terminator. */
890 static int n_compilers;
892 /* The default list of file name suffixes and their compilation specs. */
894 static const struct compiler default_compilers[] =
896 /* Add lists of suffixes of known languages here. If those languages
897 were not present when we built the driver, we will hit these copies
898 and be given a more meaningful error than "file not used since
899 linking is not done". */
900 {".m", "#Objective-C", 0, 0, 0}, {".mi", "#Objective-C", 0, 0, 0},
901 {".mm", "#Objective-C++", 0, 0, 0}, {".M", "#Objective-C++", 0, 0, 0},
902 {".mii", "#Objective-C++", 0, 0, 0},
903 {".cc", "#C++", 0, 0, 0}, {".cxx", "#C++", 0, 0, 0},
904 {".cpp", "#C++", 0, 0, 0}, {".cp", "#C++", 0, 0, 0},
905 {".c++", "#C++", 0, 0, 0}, {".C", "#C++", 0, 0, 0},
906 {".CPP", "#C++", 0, 0, 0}, {".ii", "#C++", 0, 0, 0},
907 {".ads", "#Ada", 0, 0, 0}, {".adb", "#Ada", 0, 0, 0},
908 {".f", "#Fortran", 0, 0, 0}, {".F", "#Fortran", 0, 0, 0},
909 {".for", "#Fortran", 0, 0, 0}, {".FOR", "#Fortran", 0, 0, 0},
910 {".ftn", "#Fortran", 0, 0, 0}, {".FTN", "#Fortran", 0, 0, 0},
911 {".fpp", "#Fortran", 0, 0, 0}, {".FPP", "#Fortran", 0, 0, 0},
912 {".f90", "#Fortran", 0, 0, 0}, {".F90", "#Fortran", 0, 0, 0},
913 {".f95", "#Fortran", 0, 0, 0}, {".F95", "#Fortran", 0, 0, 0},
914 {".f03", "#Fortran", 0, 0, 0}, {".F03", "#Fortran", 0, 0, 0},
915 {".f08", "#Fortran", 0, 0, 0}, {".F08", "#Fortran", 0, 0, 0},
916 {".r", "#Ratfor", 0, 0, 0},
917 {".p", "#Pascal", 0, 0, 0}, {".pas", "#Pascal", 0, 0, 0},
918 {".java", "#Java", 0, 0, 0}, {".class", "#Java", 0, 0, 0},
919 {".zip", "#Java", 0, 0, 0}, {".jar", "#Java", 0, 0, 0},
920 /* Next come the entries for C. */
921 {".c", "@c", 0, 0, 1},
923 /* cc1 has an integrated ISO C preprocessor. We should invoke the
924 external preprocessor if -save-temps is given. */
925 "%{E|M|MM:%(trad_capable_cpp) %(cpp_options) %(cpp_debug_options)}\
927 %{traditional|ftraditional:\
928 %eGNU C no longer supports -traditional without -E}\
929 %{save-temps*|traditional-cpp|no-integrated-cpp:%(trad_capable_cpp) \
930 %(cpp_options) -o %{save-temps*:%b.i} %{!save-temps*:%g.i} \n\
931 cc1 -fpreprocessed %{save-temps*:%b.i} %{!save-temps*:%g.i} \
933 %{!save-temps*:%{!traditional-cpp:%{!no-integrated-cpp:\
934 cc1 %(cpp_unique_options) %(cc1_options)}}}\
935 %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 1},
937 "%{!E:%e-E or -x required when input is from standard input}\
938 %(trad_capable_cpp) %(cpp_options) %(cpp_debug_options)", 0, 0, 0},
939 {".h", "@c-header", 0, 0, 0},
941 /* cc1 has an integrated ISO C preprocessor. We should invoke the
942 external preprocessor if -save-temps is given. */
943 "%{E|M|MM:%(trad_capable_cpp) %(cpp_options) %(cpp_debug_options)}\
945 %{save-temps*|traditional-cpp|no-integrated-cpp:%(trad_capable_cpp) \
946 %(cpp_options) -o %{save-temps*:%b.i} %{!save-temps*:%g.i} \n\
947 cc1 -fpreprocessed %{save-temps*:%b.i} %{!save-temps*:%g.i} \
949 %{!fdump-ada-spec*:-o %g.s %{!o*:--output-pch=%i.gch}\
950 %W{o*:--output-pch=%*}}%V}\
951 %{!save-temps*:%{!traditional-cpp:%{!no-integrated-cpp:\
952 cc1 %(cpp_unique_options) %(cc1_options)\
953 %{!fdump-ada-spec*:-o %g.s %{!o*:--output-pch=%i.gch}\
954 %W{o*:--output-pch=%*}}%V}}}}}}", 0, 0, 0},
955 {".i", "@cpp-output", 0, 0, 0},
957 "%{!M:%{!MM:%{!E:cc1 -fpreprocessed %i %(cc1_options) %{!fsyntax-only:%(invoke_as)}}}}", 0, 1, 0},
958 {".s", "@assembler", 0, 1, 0},
960 "%{!M:%{!MM:%{!E:%{!S:as %(asm_debug) %(asm_options) %i %A }}}}", 0, 1, 0},
961 {".sx", "@assembler-with-cpp", 0, 1, 0},
962 {".S", "@assembler-with-cpp", 0, 1, 0},
963 {"@assembler-with-cpp",
964 #ifdef AS_NEEDS_DASH_FOR_PIPED_INPUT
965 "%(trad_capable_cpp) -lang-asm %(cpp_options) -fno-directives-only\
966 %{E|M|MM:%(cpp_debug_options)}\
967 %{!M:%{!MM:%{!E:%{!S:-o %|.s |\n\
968 as %(asm_debug) %(asm_options) %|.s %A }}}}"
970 "%(trad_capable_cpp) -lang-asm %(cpp_options) -fno-directives-only\
971 %{E|M|MM:%(cpp_debug_options)}\
972 %{!M:%{!MM:%{!E:%{!S:-o %|.s |\n\
973 as %(asm_debug) %(asm_options) %m.s %A }}}}"
978 /* Mark end of table. */
982 /* Number of elements in default_compilers, not counting the terminator. */
984 static const int n_default_compilers = ARRAY_SIZE (default_compilers) - 1;
986 typedef char *char_p; /* For DEF_VEC_P. */
988 DEF_VEC_ALLOC_P(char_p,heap);
990 /* A vector of options to give to the linker.
991 These options are accumulated by %x,
992 and substituted into the linker command with %X. */
993 static VEC(char_p,heap) *linker_options;
995 /* A vector of options to give to the assembler.
996 These options are accumulated by -Wa,
997 and substituted into the assembler command with %Y. */
998 static VEC(char_p,heap) *assembler_options;
1000 /* A vector of options to give to the preprocessor.
1001 These options are accumulated by -Wp,
1002 and substituted into the preprocessor command with %Z. */
1003 static VEC(char_p,heap) *preprocessor_options;
1006 skip_whitespace (char *p)
1010 /* A fully-blank line is a delimiter in the SPEC file and shouldn't
1011 be considered whitespace. */
1012 if (p[0] == '\n' && p[1] == '\n' && p[2] == '\n')
1014 else if (*p == '\n' || *p == ' ' || *p == '\t')
1028 /* Structures to keep track of prefixes to try when looking for files. */
1032 const char *prefix; /* String to prepend to the path. */
1033 struct prefix_list *next; /* Next in linked list. */
1034 int require_machine_suffix; /* Don't use without machine_suffix. */
1035 /* 2 means try both machine_suffix and just_machine_suffix. */
1036 int priority; /* Sort key - priority within list. */
1037 int os_multilib; /* 1 if OS multilib scheme should be used,
1038 0 for GCC multilib scheme. */
1043 struct prefix_list *plist; /* List of prefixes to try */
1044 int max_len; /* Max length of a prefix in PLIST */
1045 const char *name; /* Name of this list (used in config stuff) */
1048 /* List of prefixes to try when looking for executables. */
1050 static struct path_prefix exec_prefixes = { 0, 0, "exec" };
1052 /* List of prefixes to try when looking for startup (crt0) files. */
1054 static struct path_prefix startfile_prefixes = { 0, 0, "startfile" };
1056 /* List of prefixes to try when looking for include files. */
1058 static struct path_prefix include_prefixes = { 0, 0, "include" };
1060 /* Suffix to attach to directories searched for commands.
1061 This looks like `MACHINE/VERSION/'. */
1063 static const char *machine_suffix = 0;
1065 /* Suffix to attach to directories searched for commands.
1066 This is just `MACHINE/'. */
1068 static const char *just_machine_suffix = 0;
1070 /* Adjusted value of GCC_EXEC_PREFIX envvar. */
1072 static const char *gcc_exec_prefix;
1074 /* Adjusted value of standard_libexec_prefix. */
1076 static const char *gcc_libexec_prefix;
1078 /* Default prefixes to attach to command names. */
1080 #ifndef STANDARD_STARTFILE_PREFIX_1
1081 #define STANDARD_STARTFILE_PREFIX_1 "/lib/"
1083 #ifndef STANDARD_STARTFILE_PREFIX_2
1084 #define STANDARD_STARTFILE_PREFIX_2 "/usr/lib/"
1087 #ifdef CROSS_DIRECTORY_STRUCTURE /* Don't use these prefixes for a cross compiler. */
1088 #undef MD_EXEC_PREFIX
1089 #undef MD_STARTFILE_PREFIX
1090 #undef MD_STARTFILE_PREFIX_1
1093 /* If no prefixes defined, use the null string, which will disable them. */
1094 #ifndef MD_EXEC_PREFIX
1095 #define MD_EXEC_PREFIX ""
1097 #ifndef MD_STARTFILE_PREFIX
1098 #define MD_STARTFILE_PREFIX ""
1100 #ifndef MD_STARTFILE_PREFIX_1
1101 #define MD_STARTFILE_PREFIX_1 ""
1104 /* These directories are locations set at configure-time based on the
1105 --prefix option provided to configure. Their initializers are
1106 defined in Makefile.in. These paths are not *directly* used when
1107 gcc_exec_prefix is set because, in that case, we know where the
1108 compiler has been installed, and use paths relative to that
1109 location instead. */
1110 static const char *const standard_exec_prefix = STANDARD_EXEC_PREFIX;
1111 static const char *const standard_libexec_prefix = STANDARD_LIBEXEC_PREFIX;
1112 static const char *const standard_bindir_prefix = STANDARD_BINDIR_PREFIX;
1113 static const char *const standard_startfile_prefix = STANDARD_STARTFILE_PREFIX;
1115 /* For native compilers, these are well-known paths containing
1116 components that may be provided by the system. For cross
1117 compilers, these paths are not used. */
1118 static const char *md_exec_prefix = MD_EXEC_PREFIX;
1119 static const char *md_startfile_prefix = MD_STARTFILE_PREFIX;
1120 static const char *md_startfile_prefix_1 = MD_STARTFILE_PREFIX_1;
1121 static const char *const standard_startfile_prefix_1
1122 = STANDARD_STARTFILE_PREFIX_1;
1123 static const char *const standard_startfile_prefix_2
1124 = STANDARD_STARTFILE_PREFIX_2;
1126 /* A relative path to be used in finding the location of tools
1127 relative to the driver. */
1128 static const char *const tooldir_base_prefix = TOOLDIR_BASE_PREFIX;
1130 /* Subdirectory to use for locating libraries. Set by
1131 set_multilib_dir based on the compilation options. */
1133 static const char *multilib_dir;
1135 /* Subdirectory to use for locating libraries in OS conventions. Set by
1136 set_multilib_dir based on the compilation options. */
1138 static const char *multilib_os_dir;
1140 /* Structure to keep track of the specs that have been defined so far.
1141 These are accessed using %(specname) or %[specname] in a compiler
1146 /* The following 2 fields must be first */
1147 /* to allow EXTRA_SPECS to be initialized */
1148 const char *name; /* name of the spec. */
1149 const char *ptr; /* available ptr if no static pointer */
1151 /* The following fields are not initialized */
1152 /* by EXTRA_SPECS */
1153 const char **ptr_spec; /* pointer to the spec itself. */
1154 struct spec_list *next; /* Next spec in linked list. */
1155 int name_len; /* length of the name */
1156 int alloc_p; /* whether string was allocated */
1159 #define INIT_STATIC_SPEC(NAME,PTR) \
1160 { NAME, NULL, PTR, (struct spec_list *) 0, sizeof (NAME) - 1, 0 }
1162 /* List of statically defined specs. */
1163 static struct spec_list static_specs[] =
1165 INIT_STATIC_SPEC ("asm", &asm_spec),
1166 INIT_STATIC_SPEC ("asm_debug", &asm_debug),
1167 INIT_STATIC_SPEC ("asm_final", &asm_final_spec),
1168 INIT_STATIC_SPEC ("asm_options", &asm_options),
1169 INIT_STATIC_SPEC ("invoke_as", &invoke_as),
1170 INIT_STATIC_SPEC ("cpp", &cpp_spec),
1171 INIT_STATIC_SPEC ("cpp_options", &cpp_options),
1172 INIT_STATIC_SPEC ("cpp_debug_options", &cpp_debug_options),
1173 INIT_STATIC_SPEC ("cpp_unique_options", &cpp_unique_options),
1174 INIT_STATIC_SPEC ("trad_capable_cpp", &trad_capable_cpp),
1175 INIT_STATIC_SPEC ("cc1", &cc1_spec),
1176 INIT_STATIC_SPEC ("cc1_options", &cc1_options),
1177 INIT_STATIC_SPEC ("cc1plus", &cc1plus_spec),
1178 INIT_STATIC_SPEC ("link_gcc_c_sequence", &link_gcc_c_sequence_spec),
1179 INIT_STATIC_SPEC ("link_ssp", &link_ssp_spec),
1180 INIT_STATIC_SPEC ("endfile", &endfile_spec),
1181 INIT_STATIC_SPEC ("link", &link_spec),
1182 INIT_STATIC_SPEC ("lib", &lib_spec),
1183 INIT_STATIC_SPEC ("mfwrap", &mfwrap_spec),
1184 INIT_STATIC_SPEC ("mflib", &mflib_spec),
1185 INIT_STATIC_SPEC ("link_gomp", &link_gomp_spec),
1186 INIT_STATIC_SPEC ("libgcc", &libgcc_spec),
1187 INIT_STATIC_SPEC ("startfile", &startfile_spec),
1188 INIT_STATIC_SPEC ("cross_compile", &cross_compile),
1189 INIT_STATIC_SPEC ("version", &compiler_version),
1190 INIT_STATIC_SPEC ("multilib", &multilib_select),
1191 INIT_STATIC_SPEC ("multilib_defaults", &multilib_defaults),
1192 INIT_STATIC_SPEC ("multilib_extra", &multilib_extra),
1193 INIT_STATIC_SPEC ("multilib_matches", &multilib_matches),
1194 INIT_STATIC_SPEC ("multilib_exclusions", &multilib_exclusions),
1195 INIT_STATIC_SPEC ("multilib_options", &multilib_options),
1196 INIT_STATIC_SPEC ("linker", &linker_name_spec),
1197 INIT_STATIC_SPEC ("linker_plugin_file", &linker_plugin_file_spec),
1198 INIT_STATIC_SPEC ("lto_wrapper", <o_wrapper_spec),
1199 INIT_STATIC_SPEC ("lto_gcc", <o_gcc_spec),
1200 INIT_STATIC_SPEC ("lto_libgcc", <o_libgcc_spec),
1201 INIT_STATIC_SPEC ("link_libgcc", &link_libgcc_spec),
1202 INIT_STATIC_SPEC ("md_exec_prefix", &md_exec_prefix),
1203 INIT_STATIC_SPEC ("md_startfile_prefix", &md_startfile_prefix),
1204 INIT_STATIC_SPEC ("md_startfile_prefix_1", &md_startfile_prefix_1),
1205 INIT_STATIC_SPEC ("startfile_prefix_spec", &startfile_prefix_spec),
1206 INIT_STATIC_SPEC ("sysroot_spec", &sysroot_spec),
1207 INIT_STATIC_SPEC ("sysroot_suffix_spec", &sysroot_suffix_spec),
1208 INIT_STATIC_SPEC ("sysroot_hdrs_suffix_spec", &sysroot_hdrs_suffix_spec),
1211 #ifdef EXTRA_SPECS /* additional specs needed */
1212 /* Structure to keep track of just the first two args of a spec_list.
1213 That is all that the EXTRA_SPECS macro gives us. */
1216 const char *const name;
1217 const char *const ptr;
1220 static const struct spec_list_1 extra_specs_1[] = { EXTRA_SPECS };
1221 static struct spec_list *extra_specs = (struct spec_list *) 0;
1224 /* List of dynamically allocates specs that have been defined so far. */
1226 static struct spec_list *specs = (struct spec_list *) 0;
1228 /* List of static spec functions. */
1230 static const struct spec_function static_spec_functions[] =
1232 { "getenv", getenv_spec_function },
1233 { "if-exists", if_exists_spec_function },
1234 { "if-exists-else", if_exists_else_spec_function },
1235 { "replace-outfile", replace_outfile_spec_function },
1236 { "remove-outfile", remove_outfile_spec_function },
1237 { "version-compare", version_compare_spec_function },
1238 { "include", include_spec_function },
1239 { "find-file", find_file_spec_function },
1240 { "find-plugindir", find_plugindir_spec_function },
1241 { "print-asm-header", print_asm_header_spec_function },
1242 { "compare-debug-dump-opt", compare_debug_dump_opt_spec_function },
1243 { "compare-debug-self-opt", compare_debug_self_opt_spec_function },
1244 { "compare-debug-auxbase-opt", compare_debug_auxbase_opt_spec_function },
1245 #ifdef EXTRA_SPEC_FUNCTIONS
1246 EXTRA_SPEC_FUNCTIONS
1251 static int processing_spec_function;
1253 /* Add appropriate libgcc specs to OBSTACK, taking into account
1254 various permutations of -shared-libgcc, -shared, and such. */
1256 #if defined(ENABLE_SHARED_LIBGCC) && !defined(REAL_LIBGCC_SPEC)
1258 #ifndef USE_LD_AS_NEEDED
1259 #define USE_LD_AS_NEEDED 0
1263 init_gcc_specs (struct obstack *obstack, const char *shared_name,
1264 const char *static_name, const char *eh_name)
1268 buf = concat ("%{static|static-libgcc:", static_name, " ", eh_name, "}"
1269 "%{!static:%{!static-libgcc:"
1270 #if USE_LD_AS_NEEDED
1271 "%{!shared-libgcc:",
1272 static_name, " --as-needed ", shared_name, " --no-as-needed"
1275 shared_name, "%{!shared: ", static_name, "}"
1279 "%{!shared-libgcc:", static_name, " ", eh_name, "}"
1280 "%{shared-libgcc:", shared_name, " ", static_name, "}"
1284 "%{shared-libgcc:", shared_name, "}"
1285 "%{!shared-libgcc:", static_name, "}"
1288 "%{shared:", shared_name, "}"
1293 obstack_grow (obstack, buf, strlen (buf));
1296 #endif /* ENABLE_SHARED_LIBGCC */
1298 /* Initialize the specs lookup routines. */
1303 struct spec_list *next = (struct spec_list *) 0;
1304 struct spec_list *sl = (struct spec_list *) 0;
1308 return; /* Already initialized. */
1311 fnotice (stderr, "Using built-in specs.\n");
1314 extra_specs = XCNEWVEC (struct spec_list, ARRAY_SIZE (extra_specs_1));
1316 for (i = ARRAY_SIZE (extra_specs_1) - 1; i >= 0; i--)
1318 sl = &extra_specs[i];
1319 sl->name = extra_specs_1[i].name;
1320 sl->ptr = extra_specs_1[i].ptr;
1322 sl->name_len = strlen (sl->name);
1323 sl->ptr_spec = &sl->ptr;
1328 for (i = ARRAY_SIZE (static_specs) - 1; i >= 0; i--)
1330 sl = &static_specs[i];
1335 #if defined(ENABLE_SHARED_LIBGCC) && !defined(REAL_LIBGCC_SPEC)
1336 /* ??? If neither -shared-libgcc nor --static-libgcc was
1337 seen, then we should be making an educated guess. Some proposed
1338 heuristics for ELF include:
1340 (1) If "-Wl,--export-dynamic", then it's a fair bet that the
1341 program will be doing dynamic loading, which will likely
1342 need the shared libgcc.
1344 (2) If "-ldl", then it's also a fair bet that we're doing
1347 (3) For each ET_DYN we're linking against (either through -lfoo
1348 or /some/path/foo.so), check to see whether it or one of
1349 its dependencies depends on a shared libgcc.
1353 If the runtime is fixed to look for program headers instead
1354 of calling __register_frame_info at all, for each object,
1355 use the shared libgcc if any EH symbol referenced.
1357 If crtstuff is fixed to not invoke __register_frame_info
1358 automatically, for each object, use the shared libgcc if
1359 any non-empty unwind section found.
1361 Doing any of this probably requires invoking an external program to
1362 do the actual object file scanning. */
1364 const char *p = libgcc_spec;
1367 /* Transform the extant libgcc_spec into one that uses the shared libgcc
1368 when given the proper command line arguments. */
1371 if (in_sep && *p == '-' && strncmp (p, "-lgcc", 5) == 0)
1373 init_gcc_specs (&obstack,
1375 #ifdef USE_LIBUNWIND_EXCEPTIONS
1381 #ifdef USE_LIBUNWIND_EXCEPTIONS
1382 # ifdef HAVE_LD_STATIC_DYNAMIC
1383 " %{!static:-Bstatic} -lunwind %{!static:-Bdynamic}"
1393 else if (in_sep && *p == 'l' && strncmp (p, "libgcc.a%s", 10) == 0)
1395 /* Ug. We don't know shared library extensions. Hope that
1396 systems that use this form don't do shared libraries. */
1397 init_gcc_specs (&obstack,
1401 #ifdef USE_LIBUNWIND_EXCEPTIONS
1410 obstack_1grow (&obstack, *p);
1411 in_sep = (*p == ' ');
1416 obstack_1grow (&obstack, '\0');
1417 libgcc_spec = XOBFINISH (&obstack, const char *);
1420 #ifdef USE_AS_TRADITIONAL_FORMAT
1421 /* Prepend "--traditional-format" to whatever asm_spec we had before. */
1423 static const char tf[] = "--traditional-format ";
1424 obstack_grow (&obstack, tf, sizeof(tf) - 1);
1425 obstack_grow0 (&obstack, asm_spec, strlen (asm_spec));
1426 asm_spec = XOBFINISH (&obstack, const char *);
1430 #if defined LINK_EH_SPEC || defined LINK_BUILDID_SPEC
1431 # ifdef LINK_BUILDID_SPEC
1432 /* Prepend LINK_BUILDID_SPEC to whatever link_spec we had before. */
1433 obstack_grow (&obstack, LINK_BUILDID_SPEC, sizeof(LINK_BUILDID_SPEC) - 1);
1435 # ifdef LINK_EH_SPEC
1436 /* Prepend LINK_EH_SPEC to whatever link_spec we had before. */
1437 obstack_grow (&obstack, LINK_EH_SPEC, sizeof(LINK_EH_SPEC) - 1);
1439 obstack_grow0 (&obstack, link_spec, strlen (link_spec));
1440 link_spec = XOBFINISH (&obstack, const char *);
1446 /* Change the value of spec NAME to SPEC. If SPEC is empty, then the spec is
1447 removed; If the spec starts with a + then SPEC is added to the end of the
1451 set_spec (const char *name, const char *spec)
1453 struct spec_list *sl;
1454 const char *old_spec;
1455 int name_len = strlen (name);
1458 /* If this is the first call, initialize the statically allocated specs. */
1461 struct spec_list *next = (struct spec_list *) 0;
1462 for (i = ARRAY_SIZE (static_specs) - 1; i >= 0; i--)
1464 sl = &static_specs[i];
1471 /* See if the spec already exists. */
1472 for (sl = specs; sl; sl = sl->next)
1473 if (name_len == sl->name_len && !strcmp (sl->name, name))
1478 /* Not found - make it. */
1479 sl = XNEW (struct spec_list);
1480 sl->name = xstrdup (name);
1481 sl->name_len = name_len;
1482 sl->ptr_spec = &sl->ptr;
1484 *(sl->ptr_spec) = "";
1489 old_spec = *(sl->ptr_spec);
1490 *(sl->ptr_spec) = ((spec[0] == '+' && ISSPACE ((unsigned char)spec[1]))
1491 ? concat (old_spec, spec + 1, NULL)
1496 fnotice (stderr, "Setting spec %s to '%s'\n\n", name, *(sl->ptr_spec));
1499 /* Free the old spec. */
1500 if (old_spec && sl->alloc_p)
1501 free (CONST_CAST(char *, old_spec));
1506 /* Accumulate a command (program name and args), and run it. */
1508 typedef const char *const_char_p; /* For DEF_VEC_P. */
1509 DEF_VEC_P(const_char_p);
1510 DEF_VEC_ALLOC_P(const_char_p,heap);
1512 /* Vector of pointers to arguments in the current line of specifications. */
1514 static VEC(const_char_p,heap) *argbuf;
1516 /* Position in the argbuf vector containing the name of the output file
1517 (the value associated with the "-o" flag). */
1519 static int have_o_argbuf_index = 0;
1521 /* Were the options -c, -S or -E passed. */
1522 static int have_c = 0;
1524 /* Was the option -o passed. */
1525 static int have_o = 0;
1527 /* This is the list of suffixes and codes (%g/%u/%U/%j) and the associated
1528 temp file. If the HOST_BIT_BUCKET is used for %j, no entry is made for
1531 static struct temp_name {
1532 const char *suffix; /* suffix associated with the code. */
1533 int length; /* strlen (suffix). */
1534 int unique; /* Indicates whether %g or %u/%U was used. */
1535 const char *filename; /* associated filename. */
1536 int filename_length; /* strlen (filename). */
1537 struct temp_name *next;
1540 /* Number of commands executed so far. */
1542 static int execution_count;
1544 /* Number of commands that exited with a signal. */
1546 static int signal_count;
1548 /* Allocate the argument vector. */
1553 argbuf = VEC_alloc (const_char_p, heap, 10);
1556 /* Clear out the vector of arguments (after a command is executed). */
1561 VEC_truncate (const_char_p, argbuf, 0);
1564 /* Add one argument to the vector at the end.
1565 This is done when a space is seen or at the end of the line.
1566 If DELETE_ALWAYS is nonzero, the arg is a filename
1567 and the file should be deleted eventually.
1568 If DELETE_FAILURE is nonzero, the arg is a filename
1569 and the file should be deleted if this compilation fails. */
1572 store_arg (const char *arg, int delete_always, int delete_failure)
1574 VEC_safe_push (const_char_p, heap, argbuf, arg);
1576 if (strcmp (arg, "-o") == 0)
1577 have_o_argbuf_index = VEC_length (const_char_p, argbuf);
1578 if (delete_always || delete_failure)
1581 /* If the temporary file we should delete is specified as
1582 part of a joined argument extract the filename. */
1584 && (p = strrchr (arg, '=')))
1586 record_temp_file (arg, delete_always, delete_failure);
1590 /* Load specs from a file name named FILENAME, replacing occurrences of
1591 various different types of line-endings, \r\n, \n\r and just \r, with
1595 load_specs (const char *filename)
1599 struct stat statbuf;
1606 fnotice (stderr, "Reading specs from %s\n", filename);
1608 /* Open and stat the file. */
1609 desc = open (filename, O_RDONLY, 0);
1611 pfatal_with_name (filename);
1612 if (stat (filename, &statbuf) < 0)
1613 pfatal_with_name (filename);
1615 /* Read contents of file into BUFFER. */
1616 buffer = XNEWVEC (char, statbuf.st_size + 1);
1617 readlen = read (desc, buffer, (unsigned) statbuf.st_size);
1619 pfatal_with_name (filename);
1620 buffer[readlen] = 0;
1623 specs = XNEWVEC (char, readlen + 1);
1625 for (buffer_p = buffer; buffer_p && *buffer_p; buffer_p++)
1631 if (buffer_p > buffer && *(buffer_p - 1) == '\n') /* \n\r */
1633 else if (*(buffer_p + 1) == '\n') /* \r\n */
1647 /* Read compilation specs from a file named FILENAME,
1648 replacing the default ones.
1650 A suffix which starts with `*' is a definition for
1651 one of the machine-specific sub-specs. The "suffix" should be
1652 *asm, *cc1, *cpp, *link, *startfile, etc.
1653 The corresponding spec is stored in asm_spec, etc.,
1654 rather than in the `compilers' vector.
1656 Anything invalid in the file is a fatal error. */
1659 read_specs (const char *filename, int main_p)
1664 buffer = load_specs (filename);
1666 /* Scan BUFFER for specs, putting them in the vector. */
1672 char *in, *out, *p1, *p2, *p3;
1674 /* Advance P in BUFFER to the next nonblank nocomment line. */
1675 p = skip_whitespace (p);
1679 /* Is this a special command that starts with '%'? */
1680 /* Don't allow this for the main specs file, since it would
1681 encourage people to overwrite it. */
1682 if (*p == '%' && !main_p)
1685 while (*p && *p != '\n')
1691 if (!strncmp (p1, "%include", sizeof ("%include") - 1)
1692 && (p1[sizeof "%include" - 1] == ' '
1693 || p1[sizeof "%include" - 1] == '\t'))
1697 p1 += sizeof ("%include");
1698 while (*p1 == ' ' || *p1 == '\t')
1701 if (*p1++ != '<' || p[-2] != '>')
1702 fatal_error ("specs %%include syntax malformed after "
1704 (long) (p1 - buffer + 1));
1707 new_filename = find_a_file (&startfile_prefixes, p1, R_OK, true);
1708 read_specs (new_filename ? new_filename : p1, FALSE);
1711 else if (!strncmp (p1, "%include_noerr", sizeof "%include_noerr" - 1)
1712 && (p1[sizeof "%include_noerr" - 1] == ' '
1713 || p1[sizeof "%include_noerr" - 1] == '\t'))
1717 p1 += sizeof "%include_noerr";
1718 while (*p1 == ' ' || *p1 == '\t')
1721 if (*p1++ != '<' || p[-2] != '>')
1722 fatal_error ("specs %%include syntax malformed after "
1724 (long) (p1 - buffer + 1));
1727 new_filename = find_a_file (&startfile_prefixes, p1, R_OK, true);
1729 read_specs (new_filename, FALSE);
1730 else if (verbose_flag)
1731 fnotice (stderr, "could not find specs file %s\n", p1);
1734 else if (!strncmp (p1, "%rename", sizeof "%rename" - 1)
1735 && (p1[sizeof "%rename" - 1] == ' '
1736 || p1[sizeof "%rename" - 1] == '\t'))
1739 struct spec_list *sl;
1740 struct spec_list *newsl;
1742 /* Get original name. */
1743 p1 += sizeof "%rename";
1744 while (*p1 == ' ' || *p1 == '\t')
1747 if (! ISALPHA ((unsigned char) *p1))
1748 fatal_error ("specs %%rename syntax malformed after "
1750 (long) (p1 - buffer));
1753 while (*p2 && !ISSPACE ((unsigned char) *p2))
1756 if (*p2 != ' ' && *p2 != '\t')
1757 fatal_error ("specs %%rename syntax malformed after "
1759 (long) (p2 - buffer));
1763 while (*p2 == ' ' || *p2 == '\t')
1766 if (! ISALPHA ((unsigned char) *p2))
1767 fatal_error ("specs %%rename syntax malformed after "
1769 (long) (p2 - buffer));
1771 /* Get new spec name. */
1773 while (*p3 && !ISSPACE ((unsigned char) *p3))
1777 fatal_error ("specs %%rename syntax malformed after "
1779 (long) (p3 - buffer));
1782 for (sl = specs; sl; sl = sl->next)
1783 if (name_len == sl->name_len && !strcmp (sl->name, p1))
1787 fatal_error ("specs %s spec was not found to be renamed", p1);
1789 if (strcmp (p1, p2) == 0)
1792 for (newsl = specs; newsl; newsl = newsl->next)
1793 if (strcmp (newsl->name, p2) == 0)
1794 fatal_error ("%s: attempt to rename spec %qs to "
1795 "already defined spec %qs",
1800 fnotice (stderr, "rename spec %s to %s\n", p1, p2);
1802 fnotice (stderr, "spec is '%s'\n\n", *(sl->ptr_spec));
1806 set_spec (p2, *(sl->ptr_spec));
1808 free (CONST_CAST (char *, *(sl->ptr_spec)));
1810 *(sl->ptr_spec) = "";
1815 fatal_error ("specs unknown %% command after %ld characters",
1816 (long) (p1 - buffer));
1819 /* Find the colon that should end the suffix. */
1821 while (*p1 && *p1 != ':' && *p1 != '\n')
1824 /* The colon shouldn't be missing. */
1826 fatal_error ("specs file malformed after %ld characters",
1827 (long) (p1 - buffer));
1829 /* Skip back over trailing whitespace. */
1831 while (p2 > buffer && (p2[-1] == ' ' || p2[-1] == '\t'))
1834 /* Copy the suffix to a string. */
1835 suffix = save_string (p, p2 - p);
1836 /* Find the next line. */
1837 p = skip_whitespace (p1 + 1);
1839 fatal_error ("specs file malformed after %ld characters",
1840 (long) (p - buffer));
1843 /* Find next blank line or end of string. */
1844 while (*p1 && !(*p1 == '\n' && (p1[1] == '\n' || p1[1] == '\0')))
1847 /* Specs end at the blank line and do not include the newline. */
1848 spec = save_string (p, p1 - p);
1851 /* Delete backslash-newline sequences from the spec. */
1856 if (in[0] == '\\' && in[1] == '\n')
1858 else if (in[0] == '#')
1859 while (*in && *in != '\n')
1867 if (suffix[0] == '*')
1869 if (! strcmp (suffix, "*link_command"))
1870 link_command_spec = spec;
1872 set_spec (suffix + 1, spec);
1876 /* Add this pair to the vector. */
1878 = XRESIZEVEC (struct compiler, compilers, n_compilers + 2);
1880 compilers[n_compilers].suffix = suffix;
1881 compilers[n_compilers].spec = spec;
1883 memset (&compilers[n_compilers], 0, sizeof compilers[n_compilers]);
1887 link_command_spec = spec;
1890 if (link_command_spec == 0)
1891 fatal_error ("spec file has no spec for linking");
1894 /* Record the names of temporary files we tell compilers to write,
1895 and delete them at the end of the run. */
1897 /* This is the common prefix we use to make temp file names.
1898 It is chosen once for each run of this program.
1899 It is substituted into a spec by %g or %j.
1900 Thus, all temp file names contain this prefix.
1901 In practice, all temp file names start with this prefix.
1903 This prefix comes from the envvar TMPDIR if it is defined;
1904 otherwise, from the P_tmpdir macro if that is defined;
1905 otherwise, in /usr/tmp or /tmp;
1906 or finally the current directory if all else fails. */
1908 static const char *temp_filename;
1910 /* Length of the prefix. */
1912 static int temp_filename_length;
1914 /* Define the list of temporary files to delete. */
1919 struct temp_file *next;
1922 /* Queue of files to delete on success or failure of compilation. */
1923 static struct temp_file *always_delete_queue;
1924 /* Queue of files to delete on failure of compilation. */
1925 static struct temp_file *failure_delete_queue;
1927 /* Record FILENAME as a file to be deleted automatically.
1928 ALWAYS_DELETE nonzero means delete it if all compilation succeeds;
1929 otherwise delete it in any case.
1930 FAIL_DELETE nonzero means delete it if a compilation step fails;
1931 otherwise delete it in any case. */
1934 record_temp_file (const char *filename, int always_delete, int fail_delete)
1936 char *const name = xstrdup (filename);
1940 struct temp_file *temp;
1941 for (temp = always_delete_queue; temp; temp = temp->next)
1942 if (! strcmp (name, temp->name))
1945 temp = XNEW (struct temp_file);
1946 temp->next = always_delete_queue;
1948 always_delete_queue = temp;
1955 struct temp_file *temp;
1956 for (temp = failure_delete_queue; temp; temp = temp->next)
1957 if (! strcmp (name, temp->name))
1960 temp = XNEW (struct temp_file);
1961 temp->next = failure_delete_queue;
1963 failure_delete_queue = temp;
1969 /* Delete all the temporary files whose names we previously recorded. */
1971 #ifndef DELETE_IF_ORDINARY
1972 #define DELETE_IF_ORDINARY(NAME,ST,VERBOSE_FLAG) \
1975 if (stat (NAME, &ST) >= 0 && S_ISREG (ST.st_mode)) \
1976 if (unlink (NAME) < 0) \
1978 perror_with_name (NAME); \
1983 delete_if_ordinary (const char *name)
1989 printf ("Delete %s? (y or n) ", name);
1993 while ((c = getchar ()) != '\n' && c != EOF)
1996 if (i == 'y' || i == 'Y')
1998 DELETE_IF_ORDINARY (name, st, verbose_flag);
2002 delete_temp_files (void)
2004 struct temp_file *temp;
2006 for (temp = always_delete_queue; temp; temp = temp->next)
2007 delete_if_ordinary (temp->name);
2008 always_delete_queue = 0;
2011 /* Delete all the files to be deleted on error. */
2014 delete_failure_queue (void)
2016 struct temp_file *temp;
2018 for (temp = failure_delete_queue; temp; temp = temp->next)
2019 delete_if_ordinary (temp->name);
2023 clear_failure_queue (void)
2025 failure_delete_queue = 0;
2028 /* Call CALLBACK for each path in PATHS, breaking out early if CALLBACK
2030 If DO_MULTI is true iterate over the paths twice, first with multilib
2031 suffix then without, otherwise iterate over the paths once without
2032 adding a multilib suffix. When DO_MULTI is true, some attempt is made
2033 to avoid visiting the same path twice, but we could do better. For
2034 instance, /usr/lib/../lib is considered different from /usr/lib.
2035 At least EXTRA_SPACE chars past the end of the path passed to
2036 CALLBACK are available for use by the callback.
2037 CALLBACK_INFO allows extra parameters to be passed to CALLBACK.
2039 Returns the value returned by CALLBACK. */
2042 for_each_path (const struct path_prefix *paths,
2045 void *(*callback) (char *, void *),
2046 void *callback_info)
2048 struct prefix_list *pl;
2049 const char *multi_dir = NULL;
2050 const char *multi_os_dir = NULL;
2051 const char *multi_suffix;
2052 const char *just_multi_suffix;
2055 bool skip_multi_dir = false;
2056 bool skip_multi_os_dir = false;
2058 multi_suffix = machine_suffix;
2059 just_multi_suffix = just_machine_suffix;
2060 if (do_multi && multilib_dir && strcmp (multilib_dir, ".") != 0)
2062 multi_dir = concat (multilib_dir, dir_separator_str, NULL);
2063 multi_suffix = concat (multi_suffix, multi_dir, NULL);
2064 just_multi_suffix = concat (just_multi_suffix, multi_dir, NULL);
2066 if (do_multi && multilib_os_dir && strcmp (multilib_os_dir, ".") != 0)
2067 multi_os_dir = concat (multilib_os_dir, dir_separator_str, NULL);
2071 size_t multi_dir_len = 0;
2072 size_t multi_os_dir_len = 0;
2074 size_t just_suffix_len;
2078 multi_dir_len = strlen (multi_dir);
2080 multi_os_dir_len = strlen (multi_os_dir);
2081 suffix_len = strlen (multi_suffix);
2082 just_suffix_len = strlen (just_multi_suffix);
2086 len = paths->max_len + extra_space + 1;
2087 if (suffix_len > multi_os_dir_len)
2090 len += multi_os_dir_len;
2091 path = XNEWVEC (char, len);
2094 for (pl = paths->plist; pl != 0; pl = pl->next)
2096 len = strlen (pl->prefix);
2097 memcpy (path, pl->prefix, len);
2099 /* Look first in MACHINE/VERSION subdirectory. */
2100 if (!skip_multi_dir)
2102 memcpy (path + len, multi_suffix, suffix_len + 1);
2103 ret = callback (path, callback_info);
2108 /* Some paths are tried with just the machine (ie. target)
2109 subdir. This is used for finding as, ld, etc. */
2111 && pl->require_machine_suffix == 2)
2113 memcpy (path + len, just_multi_suffix, just_suffix_len + 1);
2114 ret = callback (path, callback_info);
2119 /* Now try the base path. */
2120 if (!pl->require_machine_suffix
2121 && !(pl->os_multilib ? skip_multi_os_dir : skip_multi_dir))
2123 const char *this_multi;
2124 size_t this_multi_len;
2126 if (pl->os_multilib)
2128 this_multi = multi_os_dir;
2129 this_multi_len = multi_os_dir_len;
2133 this_multi = multi_dir;
2134 this_multi_len = multi_dir_len;
2138 memcpy (path + len, this_multi, this_multi_len + 1);
2142 ret = callback (path, callback_info);
2150 if (multi_dir == NULL && multi_os_dir == NULL)
2153 /* Run through the paths again, this time without multilibs.
2154 Don't repeat any we have already seen. */
2157 free (CONST_CAST (char *, multi_dir));
2159 free (CONST_CAST (char *, multi_suffix));
2160 multi_suffix = machine_suffix;
2161 free (CONST_CAST (char *, just_multi_suffix));
2162 just_multi_suffix = just_machine_suffix;
2165 skip_multi_dir = true;
2168 free (CONST_CAST (char *, multi_os_dir));
2169 multi_os_dir = NULL;
2172 skip_multi_os_dir = true;
2177 free (CONST_CAST (char *, multi_dir));
2178 free (CONST_CAST (char *, multi_suffix));
2179 free (CONST_CAST (char *, just_multi_suffix));
2182 free (CONST_CAST (char *, multi_os_dir));
2188 /* Callback for build_search_list. Adds path to obstack being built. */
2190 struct add_to_obstack_info {
2197 add_to_obstack (char *path, void *data)
2199 struct add_to_obstack_info *info = (struct add_to_obstack_info *) data;
2201 if (info->check_dir && !is_directory (path, false))
2204 if (!info->first_time)
2205 obstack_1grow (info->ob, PATH_SEPARATOR);
2207 obstack_grow (info->ob, path, strlen (path));
2209 info->first_time = false;
2213 /* Add or change the value of an environment variable, outputting the
2214 change to standard error if in verbose mode. */
2216 xputenv (const char *string)
2219 fnotice (stderr, "%s\n", string);
2220 putenv (CONST_CAST (char *, string));
2223 /* Build a list of search directories from PATHS.
2224 PREFIX is a string to prepend to the list.
2225 If CHECK_DIR_P is true we ensure the directory exists.
2226 If DO_MULTI is true, multilib paths are output first, then
2228 This is used mostly by putenv_from_prefixes so we use `collect_obstack'.
2229 It is also used by the --print-search-dirs flag. */
2232 build_search_list (const struct path_prefix *paths, const char *prefix,
2233 bool check_dir, bool do_multi)
2235 struct add_to_obstack_info info;
2237 info.ob = &collect_obstack;
2238 info.check_dir = check_dir;
2239 info.first_time = true;
2241 obstack_grow (&collect_obstack, prefix, strlen (prefix));
2242 obstack_1grow (&collect_obstack, '=');
2244 for_each_path (paths, do_multi, 0, add_to_obstack, &info);
2246 obstack_1grow (&collect_obstack, '\0');
2247 return XOBFINISH (&collect_obstack, char *);
2250 /* Rebuild the COMPILER_PATH and LIBRARY_PATH environment variables
2254 putenv_from_prefixes (const struct path_prefix *paths, const char *env_var,
2257 xputenv (build_search_list (paths, env_var, true, do_multi));
2260 /* Check whether NAME can be accessed in MODE. This is like access,
2261 except that it never considers directories to be executable. */
2264 access_check (const char *name, int mode)
2270 if (stat (name, &st) < 0
2271 || S_ISDIR (st.st_mode))
2275 return access (name, mode);
2278 /* Callback for find_a_file. Appends the file name to the directory
2279 path. If the resulting file exists in the right mode, return the
2280 full pathname to the file. */
2282 struct file_at_path_info {
2291 file_at_path (char *path, void *data)
2293 struct file_at_path_info *info = (struct file_at_path_info *) data;
2294 size_t len = strlen (path);
2296 memcpy (path + len, info->name, info->name_len);
2297 len += info->name_len;
2299 /* Some systems have a suffix for executable files.
2300 So try appending that first. */
2301 if (info->suffix_len)
2303 memcpy (path + len, info->suffix, info->suffix_len + 1);
2304 if (access_check (path, info->mode) == 0)
2309 if (access_check (path, info->mode) == 0)
2315 /* Search for NAME using the prefix list PREFIXES. MODE is passed to
2316 access to check permissions. If DO_MULTI is true, search multilib
2317 paths then non-multilib paths, otherwise do not search multilib paths.
2318 Return 0 if not found, otherwise return its name, allocated with malloc. */
2321 find_a_file (const struct path_prefix *pprefix, const char *name, int mode,
2324 struct file_at_path_info info;
2326 #ifdef DEFAULT_ASSEMBLER
2327 if (! strcmp (name, "as") && access (DEFAULT_ASSEMBLER, mode) == 0)
2328 return xstrdup (DEFAULT_ASSEMBLER);
2331 #ifdef DEFAULT_LINKER
2332 if (! strcmp(name, "ld") && access (DEFAULT_LINKER, mode) == 0)
2333 return xstrdup (DEFAULT_LINKER);
2336 /* Determine the filename to execute (special case for absolute paths). */
2338 if (IS_ABSOLUTE_PATH (name))
2340 if (access (name, mode) == 0)
2341 return xstrdup (name);
2347 info.suffix = (mode & X_OK) != 0 ? HOST_EXECUTABLE_SUFFIX : "";
2348 info.name_len = strlen (info.name);
2349 info.suffix_len = strlen (info.suffix);
2352 return (char*) for_each_path (pprefix, do_multi,
2353 info.name_len + info.suffix_len,
2354 file_at_path, &info);
2357 /* Ranking of prefixes in the sort list. -B prefixes are put before
2360 enum path_prefix_priority
2362 PREFIX_PRIORITY_B_OPT,
2363 PREFIX_PRIORITY_LAST
2366 /* Add an entry for PREFIX in PLIST. The PLIST is kept in ascending
2367 order according to PRIORITY. Within each PRIORITY, new entries are
2370 If WARN is nonzero, we will warn if no file is found
2371 through this prefix. WARN should point to an int
2372 which will be set to 1 if this entry is used.
2374 COMPONENT is the value to be passed to update_path.
2376 REQUIRE_MACHINE_SUFFIX is 1 if this prefix can't be used without
2377 the complete value of machine_suffix.
2378 2 means try both machine_suffix and just_machine_suffix. */
2381 add_prefix (struct path_prefix *pprefix, const char *prefix,
2382 const char *component, /* enum prefix_priority */ int priority,
2383 int require_machine_suffix, int os_multilib)
2385 struct prefix_list *pl, **prev;
2388 for (prev = &pprefix->plist;
2389 (*prev) != NULL && (*prev)->priority <= priority;
2390 prev = &(*prev)->next)
2393 /* Keep track of the longest prefix. */
2395 prefix = update_path (prefix, component);
2396 len = strlen (prefix);
2397 if (len > pprefix->max_len)
2398 pprefix->max_len = len;
2400 pl = XNEW (struct prefix_list);
2401 pl->prefix = prefix;
2402 pl->require_machine_suffix = require_machine_suffix;
2403 pl->priority = priority;
2404 pl->os_multilib = os_multilib;
2406 /* Insert after PREV. */
2411 /* Same as add_prefix, but prepending target_system_root to prefix. */
2412 /* The target_system_root prefix has been relocated by gcc_exec_prefix. */
2414 add_sysrooted_prefix (struct path_prefix *pprefix, const char *prefix,
2415 const char *component,
2416 /* enum prefix_priority */ int priority,
2417 int require_machine_suffix, int os_multilib)
2419 if (!IS_ABSOLUTE_PATH (prefix))
2420 fatal_error ("system path %qs is not absolute", prefix);
2422 if (target_system_root)
2424 if (target_sysroot_suffix)
2425 prefix = concat (target_sysroot_suffix, prefix, NULL);
2426 prefix = concat (target_system_root, prefix, NULL);
2428 /* We have to override this because GCC's notion of sysroot
2429 moves along with GCC. */
2433 add_prefix (pprefix, prefix, component, priority,
2434 require_machine_suffix, os_multilib);
2437 /* Execute the command specified by the arguments on the current line of spec.
2438 When using pipes, this includes several piped-together commands
2439 with `|' between them.
2441 Return 0 if successful, -1 if failed. */
2447 int n_commands; /* # of command. */
2449 struct pex_obj *pex;
2452 const char *prog; /* program name. */
2453 const char **argv; /* vector of args. */
2457 struct command *commands; /* each command buffer with above info. */
2459 gcc_assert (!processing_spec_function);
2463 string = find_a_file (&exec_prefixes,
2464 VEC_index (const_char_p, argbuf, 0), X_OK, false);
2466 VEC_replace (const_char_p, argbuf, 0, string);
2467 insert_wrapper (wrapper_string);
2470 /* Count # of piped commands. */
2471 for (n_commands = 1, i = 0; VEC_iterate (const_char_p, argbuf, i, arg); i++)
2472 if (strcmp (arg, "|") == 0)
2475 /* Get storage for each command. */
2476 commands = (struct command *) alloca (n_commands * sizeof (struct command));
2478 /* Split argbuf into its separate piped processes,
2479 and record info about each one.
2480 Also search for the programs that are to be run. */
2482 VEC_safe_push (const_char_p, heap, argbuf, 0);
2484 commands[0].prog = VEC_index (const_char_p, argbuf, 0); /* first command. */
2485 commands[0].argv = VEC_address (const_char_p, argbuf);
2487 if (!wrapper_string)
2489 string = find_a_file (&exec_prefixes, commands[0].prog, X_OK, false);
2490 commands[0].argv[0] = (string) ? string : commands[0].argv[0];
2493 for (n_commands = 1, i = 0; VEC_iterate (const_char_p, argbuf, i, arg); i++)
2494 if (arg && strcmp (arg, "|") == 0)
2495 { /* each command. */
2496 #if defined (__MSDOS__) || defined (OS2) || defined (VMS)
2497 fatal_error ("-pipe not supported");
2499 VEC_replace (const_char_p, argbuf, i, 0); /* Termination of
2501 commands[n_commands].prog = VEC_index (const_char_p, argbuf, i + 1);
2502 commands[n_commands].argv
2503 = &(VEC_address (const_char_p, argbuf))[i + 1];
2504 string = find_a_file (&exec_prefixes, commands[n_commands].prog,
2507 commands[n_commands].argv[0] = string;
2511 /* If -v, print what we are about to do, and maybe query. */
2515 /* For help listings, put a blank line between sub-processes. */
2516 if (print_help_list)
2517 fputc ('\n', stderr);
2519 /* Print each piped command as a separate line. */
2520 for (i = 0; i < n_commands; i++)
2522 const char *const *j;
2524 if (verbose_only_flag)
2526 for (j = commands[i].argv; *j; j++)
2529 for (p = *j; *p; ++p)
2530 if (!ISALNUM ((unsigned char) *p)
2531 && *p != '_' && *p != '/' && *p != '-' && *p != '.')
2535 fprintf (stderr, " \"");
2536 for (p = *j; *p; ++p)
2538 if (*p == '"' || *p == '\\' || *p == '$')
2539 fputc ('\\', stderr);
2542 fputc ('"', stderr);
2545 fprintf (stderr, " %s", *j);
2549 for (j = commands[i].argv; *j; j++)
2550 fprintf (stderr, " %s", *j);
2552 /* Print a pipe symbol after all but the last command. */
2553 if (i + 1 != n_commands)
2554 fprintf (stderr, " |");
2555 fprintf (stderr, "\n");
2558 if (verbose_only_flag != 0)
2560 /* verbose_only_flag should act as if the spec was
2561 executed, so increment execution_count before
2562 returning. This prevents spurious warnings about
2563 unused linker input files, etc. */
2568 fnotice (stderr, "\nGo ahead? (y or n) ");
2572 while (getchar () != '\n')
2575 if (i != 'y' && i != 'Y')
2580 #ifdef ENABLE_VALGRIND_CHECKING
2581 /* Run the each command through valgrind. To simplify prepending the
2582 path to valgrind and the option "-q" (for quiet operation unless
2583 something triggers), we allocate a separate argv array. */
2585 for (i = 0; i < n_commands; i++)
2591 for (argc = 0; commands[i].argv[argc] != NULL; argc++)
2594 argv = XALLOCAVEC (const char *, argc + 3);
2596 argv[0] = VALGRIND_PATH;
2598 for (j = 2; j < argc + 2; j++)
2599 argv[j] = commands[i].argv[j - 2];
2602 commands[i].argv = argv;
2603 commands[i].prog = argv[0];
2607 /* Run each piped subprocess. */
2609 pex = pex_init (PEX_USE_PIPES | ((report_times || report_times_to_file)
2610 ? PEX_RECORD_TIMES : 0),
2611 progname, temp_filename);
2613 fatal_error ("pex_init failed: %m");
2615 for (i = 0; i < n_commands; i++)
2619 const char *string = commands[i].argv[0];
2621 errmsg = pex_run (pex,
2622 ((i + 1 == n_commands ? PEX_LAST : 0)
2623 | (string == commands[i].prog ? PEX_SEARCH : 0)),
2624 string, CONST_CAST (char **, commands[i].argv),
2629 fatal_error (errmsg);
2633 pfatal_with_name (errmsg);
2637 if (string != commands[i].prog)
2638 free (CONST_CAST (char *, string));
2643 /* Wait for all the subprocesses to finish. */
2647 struct pex_time *times = NULL;
2650 statuses = (int *) alloca (n_commands * sizeof (int));
2651 if (!pex_get_status (pex, n_commands, statuses))
2652 fatal_error ("failed to get exit status: %m");
2654 if (report_times || report_times_to_file)
2656 times = (struct pex_time *) alloca (n_commands * sizeof (struct pex_time));
2657 if (!pex_get_times (pex, n_commands, times))
2658 fatal_error ("failed to get process times: %m");
2663 for (i = 0; i < n_commands; ++i)
2665 int status = statuses[i];
2667 if (WIFSIGNALED (status))
2670 /* SIGPIPE is a special case. It happens in -pipe mode
2671 when the compiler dies before the preprocessor is done,
2672 or the assembler dies before the compiler is done.
2673 There's generally been an error already, and this is
2674 just fallout. So don't generate another error unless
2675 we would otherwise have succeeded. */
2676 if (WTERMSIG (status) == SIGPIPE
2677 && (signal_count || greatest_status >= MIN_FATAL_STATUS))
2684 internal_error ("%s (program %s)",
2685 strsignal (WTERMSIG (status)), commands[i].prog);
2687 else if (WIFEXITED (status)
2688 && WEXITSTATUS (status) >= MIN_FATAL_STATUS)
2690 if (WEXITSTATUS (status) > greatest_status)
2691 greatest_status = WEXITSTATUS (status);
2695 if (report_times || report_times_to_file)
2697 struct pex_time *pt = ×[i];
2700 ut = ((double) pt->user_seconds
2701 + (double) pt->user_microseconds / 1.0e6);
2702 st = ((double) pt->system_seconds
2703 + (double) pt->system_microseconds / 1.0e6);
2708 fnotice (stderr, "# %s %.2f %.2f\n",
2709 commands[i].prog, ut, st);
2711 if (report_times_to_file)
2714 const char *const *j;
2716 fprintf (report_times_to_file, "%g %g", ut, st);
2718 for (j = &commands[i].prog; *j; j = &commands[i].argv[++c])
2721 for (p = *j; *p; ++p)
2722 if (*p == '"' || *p == '\\' || *p == '$'
2728 fprintf (report_times_to_file, " \"");
2729 for (p = *j; *p; ++p)
2731 if (*p == '"' || *p == '\\' || *p == '$')
2732 fputc ('\\', report_times_to_file);
2733 fputc (*p, report_times_to_file);
2735 fputc ('"', report_times_to_file);
2738 fprintf (report_times_to_file, " %s", *j);
2741 fputc ('\n', report_times_to_file);
2751 /* Find all the switches given to us
2752 and make a vector describing them.
2753 The elements of the vector are strings, one per switch given.
2754 If a switch uses following arguments, then the `part1' field
2755 is the switch itself and the `args' field
2756 is a null-terminated vector containing the following arguments.
2757 Bits in the `live_cond' field are:
2758 SWITCH_LIVE to indicate this switch is true in a conditional spec.
2759 SWITCH_FALSE to indicate this switch is overridden by a later switch.
2760 SWITCH_IGNORE to indicate this switch should be ignored (used in %<S).
2761 SWITCH_IGNORE_PERMANENTLY to indicate this switch should be ignored
2762 in all do_spec calls afterwards. Used for %<S from self specs.
2763 The `validated' field is nonzero if any spec has looked at this switch;
2764 if it remains zero at the end of the run, it must be meaningless. */
2766 #define SWITCH_LIVE 0x1
2767 #define SWITCH_FALSE 0x2
2768 #define SWITCH_IGNORE 0x4
2769 #define SWITCH_IGNORE_PERMANENTLY 0x8
2775 unsigned int live_cond;
2776 unsigned char validated;
2777 unsigned char ordering;
2780 static struct switchstr *switches;
2782 static int n_switches;
2784 static int n_switches_alloc;
2786 /* Set to zero if -fcompare-debug is disabled, positive if it's
2787 enabled and we're running the first compilation, negative if it's
2788 enabled and we're running the second compilation. For most of the
2789 time, it's in the range -1..1, but it can be temporarily set to 2
2790 or 3 to indicate that the -fcompare-debug flags didn't come from
2791 the command-line, but rather from the GCC_COMPARE_DEBUG environment
2792 variable, until a synthesized -fcompare-debug flag is added to the
2796 /* Set to nonzero if we've seen the -fcompare-debug-second flag. */
2797 int compare_debug_second;
2799 /* Set to the flags that should be passed to the second compilation in
2800 a -fcompare-debug compilation. */
2801 const char *compare_debug_opt;
2803 static struct switchstr *switches_debug_check[2];
2805 static int n_switches_debug_check[2];
2807 static int n_switches_alloc_debug_check[2];
2809 static char *debug_check_temp_file[2];
2811 /* Language is one of three things:
2813 1) The name of a real programming language.
2814 2) NULL, indicating that no one has figured out
2816 3) '*', indicating that the file should be passed
2821 const char *language;
2822 struct compiler *incompiler;
2827 /* Also a vector of input files specified. */
2829 static struct infile *infiles;
2833 static int n_infiles_alloc;
2835 /* True if multiple input files are being compiled to a single
2838 static bool combine_inputs;
2840 /* This counts the number of libraries added by lang_specific_driver, so that
2841 we can tell if there were any user supplied any files or libraries. */
2843 static int added_libraries;
2845 /* And a vector of corresponding output files is made up later. */
2847 const char **outfiles;
2849 #if defined(HAVE_TARGET_OBJECT_SUFFIX) || defined(HAVE_TARGET_EXECUTABLE_SUFFIX)
2851 /* Convert NAME to a new name if it is the standard suffix. DO_EXE
2852 is true if we should look for an executable suffix. DO_OBJ
2853 is true if we should look for an object suffix. */
2856 convert_filename (const char *name, int do_exe ATTRIBUTE_UNUSED,
2857 int do_obj ATTRIBUTE_UNUSED)
2859 #if defined(HAVE_TARGET_EXECUTABLE_SUFFIX)
2867 len = strlen (name);
2869 #ifdef HAVE_TARGET_OBJECT_SUFFIX
2870 /* Convert x.o to x.obj if TARGET_OBJECT_SUFFIX is ".obj". */
2871 if (do_obj && len > 2
2872 && name[len - 2] == '.'
2873 && name[len - 1] == 'o')
2875 obstack_grow (&obstack, name, len - 2);
2876 obstack_grow0 (&obstack, TARGET_OBJECT_SUFFIX, strlen (TARGET_OBJECT_SUFFIX));
2877 name = XOBFINISH (&obstack, const char *);
2881 #if defined(HAVE_TARGET_EXECUTABLE_SUFFIX)
2882 /* If there is no filetype, make it the executable suffix (which includes
2883 the "."). But don't get confused if we have just "-o". */
2884 if (! do_exe || TARGET_EXECUTABLE_SUFFIX[0] == 0 || (len == 2 && name[0] == '-'))
2887 for (i = len - 1; i >= 0; i--)
2888 if (IS_DIR_SEPARATOR (name[i]))
2891 for (i++; i < len; i++)
2895 obstack_grow (&obstack, name, len);
2896 obstack_grow0 (&obstack, TARGET_EXECUTABLE_SUFFIX,
2897 strlen (TARGET_EXECUTABLE_SUFFIX));
2898 name = XOBFINISH (&obstack, const char *);
2905 /* Display the command line switches accepted by gcc. */
2909 printf (_("Usage: %s [options] file...\n"), progname);
2910 fputs (_("Options:\n"), stdout);
2912 fputs (_(" -pass-exit-codes Exit with highest error code from a phase\n"), stdout);
2913 fputs (_(" --help Display this information\n"), stdout);
2914 fputs (_(" --target-help Display target specific command line options\n"), stdout);
2915 fputs (_(" --help={target|optimizers|warnings|params|[^]{joined|separate|undocumented}}[,...]\n"), stdout);
2916 fputs (_(" Display specific types of command line options\n"), stdout);
2918 fputs (_(" (Use '-v --help' to display command line options of sub-processes)\n"), stdout);
2919 fputs (_(" --version Display compiler version information\n"), stdout);
2920 fputs (_(" -dumpspecs Display all of the built in spec strings\n"), stdout);
2921 fputs (_(" -dumpversion Display the version of the compiler\n"), stdout);
2922 fputs (_(" -dumpmachine Display the compiler's target processor\n"), stdout);
2923 fputs (_(" -print-search-dirs Display the directories in the compiler's search path\n"), stdout);
2924 fputs (_(" -print-libgcc-file-name Display the name of the compiler's companion library\n"), stdout);
2925 fputs (_(" -print-file-name=<lib> Display the full path to library <lib>\n"), stdout);
2926 fputs (_(" -print-prog-name=<prog> Display the full path to compiler component <prog>\n"), stdout);
2927 fputs (_(" -print-multi-directory Display the root directory for versions of libgcc\n"), stdout);
2929 -print-multi-lib Display the mapping between command line options and\n\
2930 multiple library search directories\n"), stdout);
2931 fputs (_(" -print-multi-os-directory Display the relative path to OS libraries\n"), stdout);
2932 fputs (_(" -print-sysroot Display the target libraries directory\n"), stdout);
2933 fputs (_(" -print-sysroot-headers-suffix Display the sysroot suffix used to find headers\n"), stdout);
2934 fputs (_(" -Wa,<options> Pass comma-separated <options> on to the assembler\n"), stdout);
2935 fputs (_(" -Wp,<options> Pass comma-separated <options> on to the preprocessor\n"), stdout);
2936 fputs (_(" -Wl,<options> Pass comma-separated <options> on to the linker\n"), stdout);
2937 fputs (_(" -Xassembler <arg> Pass <arg> on to the assembler\n"), stdout);
2938 fputs (_(" -Xpreprocessor <arg> Pass <arg> on to the preprocessor\n"), stdout);
2939 fputs (_(" -Xlinker <arg> Pass <arg> on to the linker\n"), stdout);
2940 fputs (_(" -save-temps Do not delete intermediate files\n"), stdout);
2941 fputs (_(" -save-temps=<arg> Do not delete intermediate files\n"), stdout);
2943 -no-canonical-prefixes Do not canonicalize paths when building relative\n\
2944 prefixes to other gcc components\n"), stdout);
2945 fputs (_(" -pipe Use pipes rather than intermediate files\n"), stdout);
2946 fputs (_(" -time Time the execution of each subprocess\n"), stdout);
2947 fputs (_(" -specs=<file> Override built-in specs with the contents of <file>\n"), stdout);
2948 fputs (_(" -std=<standard> Assume that the input sources are for <standard>\n"), stdout);
2950 --sysroot=<directory> Use <directory> as the root directory for headers\n\
2951 and libraries\n"), stdout);
2952 fputs (_(" -B <directory> Add <directory> to the compiler's search paths\n"), stdout);
2953 fputs (_(" -v Display the programs invoked by the compiler\n"), stdout);
2954 fputs (_(" -### Like -v but options quoted and commands not executed\n"), stdout);
2955 fputs (_(" -E Preprocess only; do not compile, assemble or link\n"), stdout);
2956 fputs (_(" -S Compile only; do not assemble or link\n"), stdout);
2957 fputs (_(" -c Compile and assemble, but do not link\n"), stdout);
2958 fputs (_(" -o <file> Place the output into <file>\n"), stdout);
2960 -x <language> Specify the language of the following input files\n\
2961 Permissible languages include: c c++ assembler none\n\
2962 'none' means revert to the default behavior of\n\
2963 guessing the language based on the file's extension\n\
2967 \nOptions starting with -g, -f, -m, -O, -W, or --param are automatically\n\
2968 passed on to the various sub-processes invoked by %s. In order to pass\n\
2969 other options on to these processes the -W<letter> options must be used.\n\
2972 /* The rest of the options are displayed by invocations of the various
2977 add_preprocessor_option (const char *option, int len)
2979 VEC_safe_push (char_p, heap, preprocessor_options,
2980 save_string (option, len));
2984 add_assembler_option (const char *option, int len)
2986 VEC_safe_push (char_p, heap, assembler_options, save_string (option, len));
2990 add_linker_option (const char *option, int len)
2992 VEC_safe_push (char_p, heap, linker_options, save_string (option, len));
2995 /* Allocate space for an input file in infiles. */
3000 if (n_infiles_alloc == 0)
3002 n_infiles_alloc = 16;
3003 infiles = XNEWVEC (struct infile, n_infiles_alloc);
3005 else if (n_infiles_alloc == n_infiles)
3007 n_infiles_alloc *= 2;
3008 infiles = XRESIZEVEC (struct infile, infiles, n_infiles_alloc);
3012 /* Store an input file with the given NAME and LANGUAGE in
3016 add_infile (const char *name, const char *language)
3019 infiles[n_infiles].name = name;
3020 infiles[n_infiles++].language = language;
3023 /* Allocate space for a switch in switches. */
3028 if (n_switches_alloc == 0)
3030 n_switches_alloc = 16;
3031 switches = XNEWVEC (struct switchstr, n_switches_alloc);
3033 else if (n_switches_alloc == n_switches)
3035 n_switches_alloc *= 2;
3036 switches = XRESIZEVEC (struct switchstr, switches, n_switches_alloc);
3040 /* Save an option OPT with N_ARGS arguments in array ARGS, marking it
3041 as validated if VALIDATED. */
3044 save_switch (const char *opt, size_t n_args, const char *const *args,
3048 switches[n_switches].part1 = opt + 1;
3050 switches[n_switches].args = 0;
3053 switches[n_switches].args = XNEWVEC (const char *, n_args + 1);
3054 memcpy (switches[n_switches].args, args, n_args * sizeof (const char *));
3055 switches[n_switches].args[n_args] = NULL;
3058 switches[n_switches].live_cond = 0;
3059 switches[n_switches].validated = validated;
3060 switches[n_switches].ordering = 0;
3064 /* Handle an option DECODED that is unknown to the option-processing
3065 machinery, but may be known to specs. */
3068 driver_unknown_option_callback (const struct cl_decoded_option *decoded)
3070 save_switch (decoded->canonical_option[0],
3071 decoded->canonical_option_num_elements - 1,
3072 &decoded->canonical_option[1], false);
3077 /* Handle an option DECODED that is not marked as CL_DRIVER.
3078 LANG_MASK will always be CL_DRIVER. */
3081 driver_wrong_lang_callback (const struct cl_decoded_option *decoded,
3082 unsigned int lang_mask ATTRIBUTE_UNUSED)
3084 /* At this point, non-driver options are accepted (and expected to
3085 be passed down by specs) unless marked to be rejected by the
3086 driver. Options to be rejected by the driver but accepted by the
3087 compilers proper are treated just like completely unknown
3089 const struct cl_option *option = &cl_options[decoded->opt_index];
3091 if (option->flags & CL_REJECT_DRIVER)
3092 error ("unrecognized command line option %qs",
3093 decoded->orig_option_with_args_text);
3095 driver_unknown_option_callback (decoded);
3098 /* Note that an option (index OPT_INDEX, argument ARG, value VALUE)
3099 has been successfully handled with a handler for mask MASK. */
3102 driver_post_handling_callback (const struct cl_decoded_option *decoded ATTRIBUTE_UNUSED,
3103 unsigned int mask ATTRIBUTE_UNUSED)
3105 /* Nothing to do here. */
3108 static const char *spec_lang = 0;
3109 static int last_language_n_infiles;
3111 /* Handle a driver option; arguments and return value as for
3115 driver_handle_option (struct gcc_options *opts,
3116 struct gcc_options *opts_set,
3117 const struct cl_decoded_option *decoded,
3118 unsigned int lang_mask ATTRIBUTE_UNUSED, int kind,
3120 const struct cl_option_handlers *handlers ATTRIBUTE_UNUSED,
3121 diagnostic_context *dc)
3123 size_t opt_index = decoded->opt_index;
3124 const char *arg = decoded->arg;
3125 const char *compare_debug_replacement_opt;
3126 int value = decoded->value;
3127 bool validated = false;
3128 bool do_save = true;
3130 gcc_assert (opts == &global_options);
3131 gcc_assert (opts_set == &global_options_set);
3132 gcc_assert (kind == DK_UNSPECIFIED);
3133 gcc_assert (loc == UNKNOWN_LOCATION);
3134 gcc_assert (dc == global_dc);
3140 struct spec_list *sl;
3142 for (sl = specs; sl; sl = sl->next)
3143 printf ("*%s:\n%s\n\n", sl->name, *(sl->ptr_spec));
3144 if (link_command_spec)
3145 printf ("*link_command:\n%s\n\n", link_command_spec);
3149 case OPT_dumpversion:
3150 printf ("%s\n", spec_version);
3153 case OPT_dumpmachine:
3154 printf ("%s\n", spec_machine);
3160 /* CPP driver cannot obtain switch from cc1_options. */
3162 add_preprocessor_option ("--version", strlen ("--version"));
3163 add_assembler_option ("--version", strlen ("--version"));
3164 add_linker_option ("--version", strlen ("--version"));
3168 print_help_list = 1;
3170 /* CPP driver cannot obtain switch from cc1_options. */
3172 add_preprocessor_option ("--help", 6);
3173 add_assembler_option ("--help", 6);
3174 add_linker_option ("--help", 6);
3178 print_subprocess_help = 2;
3181 case OPT__target_help:
3182 print_subprocess_help = 1;
3184 /* CPP driver cannot obtain switch from cc1_options. */
3186 add_preprocessor_option ("--target-help", 13);
3187 add_assembler_option ("--target-help", 13);
3188 add_linker_option ("--target-help", 13);
3191 case OPT_pass_exit_codes:
3192 case OPT_print_search_dirs:
3193 case OPT_print_file_name_:
3194 case OPT_print_prog_name_:
3195 case OPT_print_multi_lib:
3196 case OPT_print_multi_directory:
3197 case OPT_print_sysroot:
3198 case OPT_print_multi_os_directory:
3199 case OPT_print_sysroot_headers_suffix:
3202 /* These options set the variables specified in common.opt
3203 automatically, and do not need to be saved for spec
3208 case OPT_print_libgcc_file_name:
3209 print_file_name = "libgcc.a";
3213 case OPT_fcompare_debug_second:
3214 compare_debug_second = 1;
3217 case OPT_fcompare_debug:
3221 compare_debug_replacement_opt = "-fcompare-debug=";
3223 goto compare_debug_with_arg;
3226 compare_debug_replacement_opt = "-fcompare-debug=-gtoggle";
3228 goto compare_debug_with_arg;
3235 case OPT_fcompare_debug_:
3236 compare_debug_replacement_opt = decoded->canonical_option[0];
3237 compare_debug_with_arg:
3238 gcc_assert (decoded->canonical_option_num_elements == 1);
3239 gcc_assert (arg != NULL);
3244 if (compare_debug < 0)
3245 compare_debug_opt = NULL;
3247 compare_debug_opt = arg;
3248 save_switch (compare_debug_replacement_opt, 0, NULL, validated);
3254 /* Pass the rest of this option to the assembler. */
3256 /* Split the argument at commas. */
3258 for (j = 0; arg[j]; j++)
3261 add_assembler_option (arg + prev, j - prev);
3265 /* Record the part after the last comma. */
3266 add_assembler_option (arg + prev, j - prev);
3274 /* Pass the rest of this option to the preprocessor. */
3276 /* Split the argument at commas. */
3278 for (j = 0; arg[j]; j++)
3281 add_preprocessor_option (arg + prev, j - prev);
3285 /* Record the part after the last comma. */
3286 add_preprocessor_option (arg + prev, j - prev);
3294 /* Split the argument at commas. */
3296 for (j = 0; arg[j]; j++)
3299 add_infile (save_string (arg + prev, j - prev), "*");
3302 /* Record the part after the last comma. */
3303 add_infile (arg + prev, "*");
3309 add_infile (arg, "*");
3313 case OPT_Xpreprocessor:
3314 add_preprocessor_option (arg, strlen (arg));
3318 case OPT_Xassembler:
3319 add_assembler_option (arg, strlen (arg));
3324 /* POSIX allows separation of -l and the lib arg; canonicalize
3325 by concatenating -l with its arg */
3326 add_infile (concat ("-l", arg, NULL), "*");
3331 /* Similarly, canonicalize -L for linkers that may not accept
3332 separate arguments. */
3333 save_switch (concat ("-L", arg, NULL), 0, NULL, validated);
3336 case OPT_save_temps:
3337 save_temps_flag = SAVE_TEMPS_CWD;
3341 case OPT_save_temps_:
3342 if (strcmp (arg, "cwd") == 0)
3343 save_temps_flag = SAVE_TEMPS_CWD;
3344 else if (strcmp (arg, "obj") == 0
3345 || strcmp (arg, "object") == 0)
3346 save_temps_flag = SAVE_TEMPS_OBJ;
3348 fatal_error ("%qs is an unknown -save-temps option",
3349 decoded->orig_option_with_args_text);
3352 case OPT_no_canonical_prefixes:
3353 /* Already handled as a special case, so ignored here. */
3359 /* These options set the variables specified in common.opt
3360 automatically, but do need to be saved for spec
3366 struct user_specs *user = XNEW (struct user_specs);
3368 user->next = (struct user_specs *) 0;
3369 user->filename = arg;
3370 if (user_specs_tail)
3371 user_specs_tail->next = user;
3373 user_specs_head = user;
3374 user_specs_tail = user;
3380 target_system_root = arg;
3381 target_system_root_changed = 1;
3386 if (report_times_to_file)
3387 fclose (report_times_to_file);
3388 report_times_to_file = fopen (arg, "a");
3394 This is similar to -v except that there is no execution
3395 of the commands and the echoed arguments are quoted. It
3396 is intended for use in shell scripts to capture the
3397 driver-generated command line. */
3398 verbose_only_flag++;
3405 size_t len = strlen (arg);
3407 /* Catch the case where the user has forgotten to append a
3408 directory separator to the path. Note, they may be using
3409 -B to add an executable name prefix, eg "i386-elf-", in
3410 order to distinguish between multiple installations of
3411 GCC in the same directory. Hence we must check to see
3412 if appending a directory separator actually makes a
3413 valid directory name. */
3414 if (!IS_DIR_SEPARATOR (arg[len - 1])
3415 && is_directory (arg, false))
3417 char *tmp = XNEWVEC (char, len + 2);
3419 tmp[len] = DIR_SEPARATOR;
3424 add_prefix (&exec_prefixes, arg, NULL,
3425 PREFIX_PRIORITY_B_OPT, 0, 0);
3426 add_prefix (&startfile_prefixes, arg, NULL,
3427 PREFIX_PRIORITY_B_OPT, 0, 0);
3428 add_prefix (&include_prefixes, arg, NULL,
3429 PREFIX_PRIORITY_B_OPT, 0, 0);
3436 if (!strcmp (spec_lang, "none"))
3437 /* Suppress the warning if -xnone comes after the last input
3438 file, because alternate command interfaces like g++ might
3439 find it useful to place -xnone after each input file. */
3442 last_language_n_infiles = n_infiles;
3448 #if defined(HAVE_TARGET_EXECUTABLE_SUFFIX) || defined(HAVE_TARGET_OBJECT_SUFFIX)
3449 arg = convert_filename (arg, ! have_c, 0);
3451 /* Save the output name in case -save-temps=obj was used. */
3452 save_temps_prefix = xstrdup (arg);
3453 /* On some systems, ld cannot handle "-o" without a space. So
3454 split the option from its argument. */
3455 save_switch ("-o", 1, &arg, validated);
3458 case OPT_static_libgcc:
3459 case OPT_shared_libgcc:
3460 case OPT_static_libgfortran:
3461 case OPT_static_libstdc__:
3462 /* These are always valid, since gcc.c itself understands the
3463 first two, gfortranspec.c understands -static-libgfortran and
3464 g++spec.c understands -static-libstdc++ */
3469 /* Various driver options need no special processing at this
3470 point, having been handled in a prescan above or being
3471 handled by specs. */
3476 save_switch (decoded->canonical_option[0],
3477 decoded->canonical_option_num_elements - 1,
3478 &decoded->canonical_option[1], validated);
3482 /* Put the driver's standard set of option handlers in *HANDLERS. */
3485 set_option_handlers (struct cl_option_handlers *handlers)
3487 handlers->unknown_option_callback = driver_unknown_option_callback;
3488 handlers->wrong_lang_callback = driver_wrong_lang_callback;
3489 handlers->post_handling_callback = driver_post_handling_callback;
3490 handlers->num_handlers = 1;
3491 handlers->handlers[0].handler = driver_handle_option;
3492 handlers->handlers[0].mask = CL_DRIVER;
3495 /* Create the vector `switches' and its contents.
3496 Store its length in `n_switches'. */
3499 process_command (unsigned int decoded_options_count,
3500 struct cl_decoded_option *decoded_options)
3504 const char *tooldir_prefix;
3505 char *(*get_relative_prefix) (const char *, const char *,
3506 const char *) = NULL;
3507 struct cl_option_handlers handlers;
3510 GET_ENVIRONMENT (gcc_exec_prefix, "GCC_EXEC_PREFIX");
3514 added_libraries = 0;
3516 /* Figure compiler version from version string. */
3518 compiler_version = temp1 = xstrdup (version_string);
3520 for (; *temp1; ++temp1)
3529 /* Handle any -no-canonical-prefixes flag early, to assign the function
3530 that builds relative prefixes. This function creates default search
3531 paths that are needed later in normal option handling. */
3533 for (j = 1; j < decoded_options_count; j++)
3535 if (decoded_options[j].opt_index == OPT_no_canonical_prefixes)
3537 get_relative_prefix = make_relative_prefix_ignore_links;
3541 if (! get_relative_prefix)
3542 get_relative_prefix = make_relative_prefix;
3544 /* Set up the default search paths. If there is no GCC_EXEC_PREFIX,
3545 see if we can create it from the pathname specified in
3546 decoded_options[0].arg. */
3548 gcc_libexec_prefix = standard_libexec_prefix;
3550 /* FIXME: make_relative_prefix doesn't yet work for VMS. */
3551 if (!gcc_exec_prefix)
3553 gcc_exec_prefix = get_relative_prefix (decoded_options[0].arg,
3554 standard_bindir_prefix,
3555 standard_exec_prefix);
3556 gcc_libexec_prefix = get_relative_prefix (decoded_options[0].arg,
3557 standard_bindir_prefix,
3558 standard_libexec_prefix);
3559 if (gcc_exec_prefix)
3560 xputenv (concat ("GCC_EXEC_PREFIX=", gcc_exec_prefix, NULL));
3564 /* make_relative_prefix requires a program name, but
3565 GCC_EXEC_PREFIX is typically a directory name with a trailing
3566 / (which is ignored by make_relative_prefix), so append a
3568 char *tmp_prefix = concat (gcc_exec_prefix, "gcc", NULL);
3569 gcc_libexec_prefix = get_relative_prefix (tmp_prefix,
3570 standard_exec_prefix,
3571 standard_libexec_prefix);
3573 /* The path is unrelocated, so fallback to the original setting. */
3574 if (!gcc_libexec_prefix)
3575 gcc_libexec_prefix = standard_libexec_prefix;