jit: document union types
[official-gcc.git] / gcc / gcc.c
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1 /* Compiler driver program that can handle many languages.
2 Copyright (C) 1987-2015 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
9 version.
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 for more details.
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
20 /* This program is the user interface to the C compiler and possibly to
21 other compilers. It is used because compilation is a complicated procedure
22 which involves running several programs and passing temporary files between
23 them, forwarding the users switches to those programs selectively,
24 and deleting the temporary files at the end.
26 CC recognizes how to compile each input file by suffixes in the file names.
27 Once it knows which kind of compilation to perform, the procedure for
28 compilation is specified by a string called a "spec". */
30 #include "config.h"
31 #include "system.h"
32 #include "coretypes.h"
33 #include "multilib.h" /* before tm.h */
34 #include "tm.h"
35 #include "xregex.h"
36 #include "obstack.h"
37 #include "intl.h"
38 #include "prefix.h"
39 #include "gcc.h"
40 #include "diagnostic.h"
41 #include "flags.h"
42 #include "opts.h"
43 #include "params.h"
44 #include "filenames.h"
46 /* By default there is no special suffix for target executables. */
47 /* FIXME: when autoconf is fixed, remove the host check - dj */
48 #if defined(TARGET_EXECUTABLE_SUFFIX) && defined(HOST_EXECUTABLE_SUFFIX)
49 #define HAVE_TARGET_EXECUTABLE_SUFFIX
50 #endif
52 /* By default there is no special suffix for host executables. */
53 #ifdef HOST_EXECUTABLE_SUFFIX
54 #define HAVE_HOST_EXECUTABLE_SUFFIX
55 #else
56 #define HOST_EXECUTABLE_SUFFIX ""
57 #endif
59 /* By default, the suffix for target object files is ".o". */
60 #ifdef TARGET_OBJECT_SUFFIX
61 #define HAVE_TARGET_OBJECT_SUFFIX
62 #else
63 #define TARGET_OBJECT_SUFFIX ".o"
64 #endif
66 static const char dir_separator_str[] = { DIR_SEPARATOR, 0 };
68 /* Most every one is fine with LIBRARY_PATH. For some, it conflicts. */
69 #ifndef LIBRARY_PATH_ENV
70 #define LIBRARY_PATH_ENV "LIBRARY_PATH"
71 #endif
73 /* If a stage of compilation returns an exit status >= 1,
74 compilation of that file ceases. */
76 #define MIN_FATAL_STATUS 1
78 /* Flag set by cppspec.c to 1. */
79 int is_cpp_driver;
81 /* Flag set to nonzero if an @file argument has been supplied to gcc. */
82 static bool at_file_supplied;
84 /* Definition of string containing the arguments given to configure. */
85 #include "configargs.h"
87 /* Flag saying to print the command line options understood by gcc and its
88 sub-processes. */
90 static int print_help_list;
92 /* Flag saying to print the version of gcc and its sub-processes. */
94 static int print_version;
96 /* Flag indicating whether we should ONLY print the command and
97 arguments (like verbose_flag) without executing the command.
98 Displayed arguments are quoted so that the generated command
99 line is suitable for execution. This is intended for use in
100 shell scripts to capture the driver-generated command line. */
101 static int verbose_only_flag;
103 /* Flag indicating how to print command line options of sub-processes. */
105 static int print_subprocess_help;
107 /* Linker suffix passed to -fuse-ld=... */
108 static const char *use_ld;
110 /* Whether we should report subprocess execution times to a file. */
112 FILE *report_times_to_file = NULL;
114 /* Nonzero means place this string before uses of /, so that include
115 and library files can be found in an alternate location. */
117 #ifdef TARGET_SYSTEM_ROOT
118 static const char *target_system_root = TARGET_SYSTEM_ROOT;
119 #else
120 static const char *target_system_root = 0;
121 #endif
123 /* Nonzero means pass the updated target_system_root to the compiler. */
125 static int target_system_root_changed;
127 /* Nonzero means append this string to target_system_root. */
129 static const char *target_sysroot_suffix = 0;
131 /* Nonzero means append this string to target_system_root for headers. */
133 static const char *target_sysroot_hdrs_suffix = 0;
135 /* Nonzero means write "temp" files in source directory
136 and use the source file's name in them, and don't delete them. */
138 static enum save_temps {
139 SAVE_TEMPS_NONE, /* no -save-temps */
140 SAVE_TEMPS_CWD, /* -save-temps in current directory */
141 SAVE_TEMPS_OBJ /* -save-temps in object directory */
142 } save_temps_flag;
144 /* Output file to use to get the object directory for -save-temps=obj */
145 static char *save_temps_prefix = 0;
146 static size_t save_temps_length = 0;
148 /* The compiler version. */
150 static const char *compiler_version;
152 /* The target version. */
154 static const char *const spec_version = DEFAULT_TARGET_VERSION;
156 /* The target machine. */
158 static const char *spec_machine = DEFAULT_TARGET_MACHINE;
159 static const char *spec_host_machine = DEFAULT_REAL_TARGET_MACHINE;
161 /* List of offload targets. */
163 static char *offload_targets = NULL;
165 /* Nonzero if cross-compiling.
166 When -b is used, the value comes from the `specs' file. */
168 #ifdef CROSS_DIRECTORY_STRUCTURE
169 static const char *cross_compile = "1";
170 #else
171 static const char *cross_compile = "0";
172 #endif
174 /* Greatest exit code of sub-processes that has been encountered up to
175 now. */
176 static int greatest_status = 1;
178 /* This is the obstack which we use to allocate many strings. */
180 static struct obstack obstack;
182 /* This is the obstack to build an environment variable to pass to
183 collect2 that describes all of the relevant switches of what to
184 pass the compiler in building the list of pointers to constructors
185 and destructors. */
187 static struct obstack collect_obstack;
189 /* Forward declaration for prototypes. */
190 struct path_prefix;
191 struct prefix_list;
193 static void init_spec (void);
194 static void store_arg (const char *, int, int);
195 static void insert_wrapper (const char *);
196 static char *load_specs (const char *);
197 static void read_specs (const char *, bool, bool);
198 static void set_spec (const char *, const char *, bool);
199 static struct compiler *lookup_compiler (const char *, size_t, const char *);
200 static char *build_search_list (const struct path_prefix *, const char *,
201 bool, bool);
202 static void xputenv (const char *);
203 static void putenv_from_prefixes (const struct path_prefix *, const char *,
204 bool);
205 static int access_check (const char *, int);
206 static char *find_a_file (const struct path_prefix *, const char *, int, bool);
207 static void add_prefix (struct path_prefix *, const char *, const char *,
208 int, int, int);
209 static void add_sysrooted_prefix (struct path_prefix *, const char *,
210 const char *, int, int, int);
211 static char *skip_whitespace (char *);
212 static void delete_if_ordinary (const char *);
213 static void delete_temp_files (void);
214 static void delete_failure_queue (void);
215 static void clear_failure_queue (void);
216 static int check_live_switch (int, int);
217 static const char *handle_braces (const char *);
218 static inline bool input_suffix_matches (const char *, const char *);
219 static inline bool switch_matches (const char *, const char *, int);
220 static inline void mark_matching_switches (const char *, const char *, int);
221 static inline void process_marked_switches (void);
222 static const char *process_brace_body (const char *, const char *, const char *, int, int);
223 static const struct spec_function *lookup_spec_function (const char *);
224 static const char *eval_spec_function (const char *, const char *);
225 static const char *handle_spec_function (const char *, bool *);
226 static char *save_string (const char *, int);
227 static void set_collect_gcc_options (void);
228 static int do_spec_1 (const char *, int, const char *);
229 static int do_spec_2 (const char *);
230 static void do_option_spec (const char *, const char *);
231 static void do_self_spec (const char *);
232 static const char *find_file (const char *);
233 static int is_directory (const char *, bool);
234 static const char *validate_switches (const char *, bool);
235 static void validate_all_switches (void);
236 static inline void validate_switches_from_spec (const char *, bool);
237 static void give_switch (int, int);
238 static int used_arg (const char *, int);
239 static int default_arg (const char *, int);
240 static void set_multilib_dir (void);
241 static void print_multilib_info (void);
242 static void perror_with_name (const char *);
243 static void display_help (void);
244 static void add_preprocessor_option (const char *, int);
245 static void add_assembler_option (const char *, int);
246 static void add_linker_option (const char *, int);
247 static void process_command (unsigned int, struct cl_decoded_option *);
248 static int execute (void);
249 static void alloc_args (void);
250 static void clear_args (void);
251 static void fatal_signal (int);
252 #if defined(ENABLE_SHARED_LIBGCC) && !defined(REAL_LIBGCC_SPEC)
253 static void init_gcc_specs (struct obstack *, const char *, const char *,
254 const char *);
255 #endif
256 #if defined(HAVE_TARGET_OBJECT_SUFFIX) || defined(HAVE_TARGET_EXECUTABLE_SUFFIX)
257 static const char *convert_filename (const char *, int, int);
258 #endif
260 static void try_generate_repro (const char **argv);
261 static const char *getenv_spec_function (int, const char **);
262 static const char *if_exists_spec_function (int, const char **);
263 static const char *if_exists_else_spec_function (int, const char **);
264 static const char *sanitize_spec_function (int, const char **);
265 static const char *replace_outfile_spec_function (int, const char **);
266 static const char *remove_outfile_spec_function (int, const char **);
267 static const char *version_compare_spec_function (int, const char **);
268 static const char *include_spec_function (int, const char **);
269 static const char *find_file_spec_function (int, const char **);
270 static const char *find_plugindir_spec_function (int, const char **);
271 static const char *print_asm_header_spec_function (int, const char **);
272 static const char *compare_debug_dump_opt_spec_function (int, const char **);
273 static const char *compare_debug_self_opt_spec_function (int, const char **);
274 static const char *compare_debug_auxbase_opt_spec_function (int, const char **);
275 static const char *pass_through_libs_spec_func (int, const char **);
276 static const char *replace_extension_spec_func (int, const char **);
277 static char *convert_white_space (char *);
279 /* The Specs Language
281 Specs are strings containing lines, each of which (if not blank)
282 is made up of a program name, and arguments separated by spaces.
283 The program name must be exact and start from root, since no path
284 is searched and it is unreliable to depend on the current working directory.
285 Redirection of input or output is not supported; the subprograms must
286 accept filenames saying what files to read and write.
288 In addition, the specs can contain %-sequences to substitute variable text
289 or for conditional text. Here is a table of all defined %-sequences.
290 Note that spaces are not generated automatically around the results of
291 expanding these sequences; therefore, you can concatenate them together
292 or with constant text in a single argument.
294 %% substitute one % into the program name or argument.
295 %i substitute the name of the input file being processed.
296 %b substitute the basename of the input file being processed.
297 This is the substring up to (and not including) the last period
298 and not including the directory unless -save-temps was specified
299 to put temporaries in a different location.
300 %B same as %b, but include the file suffix (text after the last period).
301 %gSUFFIX
302 substitute a file name that has suffix SUFFIX and is chosen
303 once per compilation, and mark the argument a la %d. To reduce
304 exposure to denial-of-service attacks, the file name is now
305 chosen in a way that is hard to predict even when previously
306 chosen file names are known. For example, `%g.s ... %g.o ... %g.s'
307 might turn into `ccUVUUAU.s ccXYAXZ12.o ccUVUUAU.s'. SUFFIX matches
308 the regexp "[.0-9A-Za-z]*%O"; "%O" is treated exactly as if it
309 had been pre-processed. Previously, %g was simply substituted
310 with a file name chosen once per compilation, without regard
311 to any appended suffix (which was therefore treated just like
312 ordinary text), making such attacks more likely to succeed.
313 %|SUFFIX
314 like %g, but if -pipe is in effect, expands simply to "-".
315 %mSUFFIX
316 like %g, but if -pipe is in effect, expands to nothing. (We have both
317 %| and %m to accommodate differences between system assemblers; see
318 the AS_NEEDS_DASH_FOR_PIPED_INPUT target macro.)
319 %uSUFFIX
320 like %g, but generates a new temporary file name even if %uSUFFIX
321 was already seen.
322 %USUFFIX
323 substitutes the last file name generated with %uSUFFIX, generating a
324 new one if there is no such last file name. In the absence of any
325 %uSUFFIX, this is just like %gSUFFIX, except they don't share
326 the same suffix "space", so `%g.s ... %U.s ... %g.s ... %U.s'
327 would involve the generation of two distinct file names, one
328 for each `%g.s' and another for each `%U.s'. Previously, %U was
329 simply substituted with a file name chosen for the previous %u,
330 without regard to any appended suffix.
331 %jSUFFIX
332 substitutes the name of the HOST_BIT_BUCKET, if any, and if it is
333 writable, and if save-temps is off; otherwise, substitute the name
334 of a temporary file, just like %u. This temporary file is not
335 meant for communication between processes, but rather as a junk
336 disposal mechanism.
337 %.SUFFIX
338 substitutes .SUFFIX for the suffixes of a matched switch's args when
339 it is subsequently output with %*. SUFFIX is terminated by the next
340 space or %.
341 %d marks the argument containing or following the %d as a
342 temporary file name, so that that file will be deleted if GCC exits
343 successfully. Unlike %g, this contributes no text to the argument.
344 %w marks the argument containing or following the %w as the
345 "output file" of this compilation. This puts the argument
346 into the sequence of arguments that %o will substitute later.
347 %V indicates that this compilation produces no "output file".
348 %W{...}
349 like %{...} but mark last argument supplied within
350 as a file to be deleted on failure.
351 %o substitutes the names of all the output files, with spaces
352 automatically placed around them. You should write spaces
353 around the %o as well or the results are undefined.
354 %o is for use in the specs for running the linker.
355 Input files whose names have no recognized suffix are not compiled
356 at all, but they are included among the output files, so they will
357 be linked.
358 %O substitutes the suffix for object files. Note that this is
359 handled specially when it immediately follows %g, %u, or %U
360 (with or without a suffix argument) because of the need for
361 those to form complete file names. The handling is such that
362 %O is treated exactly as if it had already been substituted,
363 except that %g, %u, and %U do not currently support additional
364 SUFFIX characters following %O as they would following, for
365 example, `.o'.
366 %I Substitute any of -iprefix (made from GCC_EXEC_PREFIX), -isysroot
367 (made from TARGET_SYSTEM_ROOT), -isystem (made from COMPILER_PATH
368 and -B options) and -imultilib as necessary.
369 %s current argument is the name of a library or startup file of some sort.
370 Search for that file in a standard list of directories
371 and substitute the full name found.
372 %eSTR Print STR as an error message. STR is terminated by a newline.
373 Use this when inconsistent options are detected.
374 %nSTR Print STR as a notice. STR is terminated by a newline.
375 %x{OPTION} Accumulate an option for %X.
376 %X Output the accumulated linker options specified by compilations.
377 %Y Output the accumulated assembler options specified by compilations.
378 %Z Output the accumulated preprocessor options specified by compilations.
379 %a process ASM_SPEC as a spec.
380 This allows config.h to specify part of the spec for running as.
381 %A process ASM_FINAL_SPEC as a spec. A capital A is actually
382 used here. This can be used to run a post-processor after the
383 assembler has done its job.
384 %D Dump out a -L option for each directory in startfile_prefixes.
385 If multilib_dir is set, extra entries are generated with it affixed.
386 %l process LINK_SPEC as a spec.
387 %L process LIB_SPEC as a spec.
388 %M Output multilib_os_dir.
389 %G process LIBGCC_SPEC as a spec.
390 %R Output the concatenation of target_system_root and
391 target_sysroot_suffix.
392 %S process STARTFILE_SPEC as a spec. A capital S is actually used here.
393 %E process ENDFILE_SPEC as a spec. A capital E is actually used here.
394 %C process CPP_SPEC as a spec.
395 %1 process CC1_SPEC as a spec.
396 %2 process CC1PLUS_SPEC as a spec.
397 %* substitute the variable part of a matched option. (See below.)
398 Note that each comma in the substituted string is replaced by
399 a single space. A space is appended after the last substition
400 unless there is more text in current sequence.
401 %<S remove all occurrences of -S from the command line.
402 Note - this command is position dependent. % commands in the
403 spec string before this one will see -S, % commands in the
404 spec string after this one will not.
405 %>S Similar to "%<S", but keep it in the GCC command line.
406 %<S* remove all occurrences of all switches beginning with -S from the
407 command line.
408 %:function(args)
409 Call the named function FUNCTION, passing it ARGS. ARGS is
410 first processed as a nested spec string, then split into an
411 argument vector in the usual fashion. The function returns
412 a string which is processed as if it had appeared literally
413 as part of the current spec.
414 %{S} substitutes the -S switch, if that switch was given to GCC.
415 If that switch was not specified, this substitutes nothing.
416 Here S is a metasyntactic variable.
417 %{S*} substitutes all the switches specified to GCC whose names start
418 with -S. This is used for -o, -I, etc; switches that take
419 arguments. GCC considers `-o foo' as being one switch whose
420 name starts with `o'. %{o*} would substitute this text,
421 including the space; thus, two arguments would be generated.
422 %{S*&T*} likewise, but preserve order of S and T options (the order
423 of S and T in the spec is not significant). Can be any number
424 of ampersand-separated variables; for each the wild card is
425 optional. Useful for CPP as %{D*&U*&A*}.
427 %{S:X} substitutes X, if the -S switch was given to GCC.
428 %{!S:X} substitutes X, if the -S switch was NOT given to GCC.
429 %{S*:X} substitutes X if one or more switches whose names start
430 with -S was given to GCC. Normally X is substituted only
431 once, no matter how many such switches appeared. However,
432 if %* appears somewhere in X, then X will be substituted
433 once for each matching switch, with the %* replaced by the
434 part of that switch that matched the '*'. A space will be
435 appended after the last substition unless there is more
436 text in current sequence.
437 %{.S:X} substitutes X, if processing a file with suffix S.
438 %{!.S:X} substitutes X, if NOT processing a file with suffix S.
439 %{,S:X} substitutes X, if processing a file which will use spec S.
440 %{!,S:X} substitutes X, if NOT processing a file which will use spec S.
442 %{S|T:X} substitutes X if either -S or -T was given to GCC. This may be
443 combined with '!', '.', ',', and '*' as above binding stronger
444 than the OR.
445 If %* appears in X, all of the alternatives must be starred, and
446 only the first matching alternative is substituted.
447 %{%:function(args):X}
448 Call function named FUNCTION with args ARGS. If the function
449 returns non-NULL, then X is substituted, if it returns
450 NULL, it isn't 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:
458 The conditional text X in a %{S:X} or similar construct may contain
459 other nested % constructs or spaces, or even newlines. They are
460 processed as usual, as described above. Trailing white space in X is
461 ignored. White space may also appear anywhere on the left side of the
462 colon in these constructs, except between . or * and the corresponding
463 word.
465 The -O, -f, -g, -m, and -W switches are handled specifically in these
466 constructs. If another value of -O or the negated form of a -f, -m, or
467 -W switch is found later in the command line, the earlier switch
468 value is ignored, except with {S*} where S is just one letter; this
469 passes all matching options.
471 The character | at the beginning of the predicate text is used to indicate
472 that a command should be piped to the following command, but only if -pipe
473 is specified.
475 Note that it is built into GCC which switches take arguments and which
476 do not. You might think it would be useful to generalize this to
477 allow each compiler's spec to say which switches take arguments. But
478 this cannot be done in a consistent fashion. GCC cannot even decide
479 which input files have been specified without knowing which switches
480 take arguments, and it must know which input files to compile in order
481 to tell which compilers to run.
483 GCC also knows implicitly that arguments starting in `-l' are to be
484 treated as compiler output files, and passed to the linker in their
485 proper position among the other output files. */
487 /* Define the macros used for specs %a, %l, %L, %S, %C, %1. */
489 /* config.h can define ASM_SPEC to provide extra args to the assembler
490 or extra switch-translations. */
491 #ifndef ASM_SPEC
492 #define ASM_SPEC ""
493 #endif
495 /* config.h can define ASM_FINAL_SPEC to run a post processor after
496 the assembler has run. */
497 #ifndef ASM_FINAL_SPEC
498 #define ASM_FINAL_SPEC \
499 "%{gsplit-dwarf: \n\
500 objcopy --extract-dwo \
501 %{c:%{o*:%*}%{!o*:%b%O}}%{!c:%U%O} \
502 %{c:%{o*:%:replace-extension(%{o*:%*} .dwo)}%{!o*:%b.dwo}}%{!c:%b.dwo} \n\
503 objcopy --strip-dwo \
504 %{c:%{o*:%*}%{!o*:%b%O}}%{!c:%U%O} \
506 #endif
508 /* config.h can define CPP_SPEC to provide extra args to the C preprocessor
509 or extra switch-translations. */
510 #ifndef CPP_SPEC
511 #define CPP_SPEC ""
512 #endif
514 /* config.h can define CC1_SPEC to provide extra args to cc1 and cc1plus
515 or extra switch-translations. */
516 #ifndef CC1_SPEC
517 #define CC1_SPEC ""
518 #endif
520 /* config.h can define CC1PLUS_SPEC to provide extra args to cc1plus
521 or extra switch-translations. */
522 #ifndef CC1PLUS_SPEC
523 #define CC1PLUS_SPEC ""
524 #endif
526 /* config.h can define LINK_SPEC to provide extra args to the linker
527 or extra switch-translations. */
528 #ifndef LINK_SPEC
529 #define LINK_SPEC ""
530 #endif
532 /* config.h can define LIB_SPEC to override the default libraries. */
533 #ifndef LIB_SPEC
534 #define LIB_SPEC "%{!shared:%{g*:-lg} %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}}"
535 #endif
537 /* When using -fsplit-stack we need to wrap pthread_create, in order
538 to initialize the stack guard. We always use wrapping, rather than
539 shared library ordering, and we keep the wrapper function in
540 libgcc. This is not yet a real spec, though it could become one;
541 it is currently just stuffed into LINK_SPEC. FIXME: This wrapping
542 only works with GNU ld and gold. */
543 #define STACK_SPLIT_SPEC " %{fsplit-stack: --wrap=pthread_create}"
545 #ifndef LIBASAN_SPEC
546 #define STATIC_LIBASAN_LIBS \
547 " %{static-libasan:%:include(libsanitizer.spec)%(link_libasan)}"
548 #ifdef LIBASAN_EARLY_SPEC
549 #define LIBASAN_SPEC STATIC_LIBASAN_LIBS
550 #elif defined(HAVE_LD_STATIC_DYNAMIC)
551 #define LIBASAN_SPEC "%{static-libasan:" LD_STATIC_OPTION \
552 "} -lasan %{static-libasan:" LD_DYNAMIC_OPTION "}" \
553 STATIC_LIBASAN_LIBS
554 #else
555 #define LIBASAN_SPEC "-lasan" STATIC_LIBASAN_LIBS
556 #endif
557 #endif
559 #ifndef LIBASAN_EARLY_SPEC
560 #define LIBASAN_EARLY_SPEC ""
561 #endif
563 #ifndef LIBTSAN_SPEC
564 #define STATIC_LIBTSAN_LIBS \
565 " %{static-libtsan:%:include(libsanitizer.spec)%(link_libtsan)}"
566 #ifdef LIBTSAN_EARLY_SPEC
567 #define LIBTSAN_SPEC STATIC_LIBTSAN_LIBS
568 #elif defined(HAVE_LD_STATIC_DYNAMIC)
569 #define LIBTSAN_SPEC "%{static-libtsan:" LD_STATIC_OPTION \
570 "} -ltsan %{static-libtsan:" LD_DYNAMIC_OPTION "}" \
571 STATIC_LIBTSAN_LIBS
572 #else
573 #define LIBTSAN_SPEC "-ltsan" STATIC_LIBTSAN_LIBS
574 #endif
575 #endif
577 #ifndef LIBTSAN_EARLY_SPEC
578 #define LIBTSAN_EARLY_SPEC ""
579 #endif
581 #ifndef LIBLSAN_SPEC
582 #define STATIC_LIBLSAN_LIBS \
583 " %{static-liblsan:%:include(libsanitizer.spec)%(link_liblsan)}"
584 #ifdef LIBLSAN_EARLY_SPEC
585 #define LIBLSAN_SPEC STATIC_LIBLSAN_LIBS
586 #elif defined(HAVE_LD_STATIC_DYNAMIC)
587 #define LIBLSAN_SPEC "%{static-liblsan:" LD_STATIC_OPTION \
588 "} -llsan %{static-liblsan:" LD_DYNAMIC_OPTION "}" \
589 STATIC_LIBLSAN_LIBS
590 #else
591 #define LIBLSAN_SPEC "-llsan" STATIC_LIBLSAN_LIBS
592 #endif
593 #endif
595 #ifndef LIBLSAN_EARLY_SPEC
596 #define LIBLSAN_EARLY_SPEC ""
597 #endif
599 #ifndef LIBUBSAN_SPEC
600 #define STATIC_LIBUBSAN_LIBS \
601 " %{static-libubsan:%:include(libsanitizer.spec)%(link_libubsan)}"
602 #ifdef HAVE_LD_STATIC_DYNAMIC
603 #define LIBUBSAN_SPEC "%{static-libubsan:" LD_STATIC_OPTION \
604 "} -lubsan %{static-libubsan:" LD_DYNAMIC_OPTION "}" \
605 STATIC_LIBUBSAN_LIBS
606 #else
607 #define LIBUBSAN_SPEC "-lubsan" STATIC_LIBUBSAN_LIBS
608 #endif
609 #endif
611 /* Linker options for compressed debug sections. */
612 #if HAVE_LD_COMPRESS_DEBUG == 0
613 /* No linker support. */
614 #define LINK_COMPRESS_DEBUG_SPEC \
615 " %{gz*:%e-gz is not supported in this configuration} "
616 #elif HAVE_LD_COMPRESS_DEBUG == 1
617 /* GNU style on input, GNU ld options. Reject, not useful. */
618 #define LINK_COMPRESS_DEBUG_SPEC \
619 " %{gz*:%e-gz is not supported in this configuration} "
620 #elif HAVE_LD_COMPRESS_DEBUG == 2
621 /* GNU style, GNU gold options. */
622 #define LINK_COMPRESS_DEBUG_SPEC \
623 " %{gz|gz=zlib-gnu:" LD_COMPRESS_DEBUG_OPTION "=zlib}" \
624 " %{gz=none:" LD_COMPRESS_DEBUG_OPTION "=none}" \
625 " %{gz=zlib:%e-gz=zlib is not supported in this configuration} "
626 #elif HAVE_LD_COMPRESS_DEBUG == 3
627 /* ELF gABI style. */
628 #define LINK_COMPRESS_DEBUG_SPEC \
629 " %{gz|gz=zlib:" LD_COMPRESS_DEBUG_OPTION "=zlib}" \
630 " %{gz=none:" LD_COMPRESS_DEBUG_OPTION "=none}" \
631 " %{gz=zlib-gnu:" LD_COMPRESS_DEBUG_OPTION "=zlib-gnu} "
632 #else
633 #error Unknown value for HAVE_LD_COMPRESS_DEBUG.
634 #endif
636 /* config.h can define LIBGCC_SPEC to override how and when libgcc.a is
637 included. */
638 #ifndef LIBGCC_SPEC
639 #if defined(REAL_LIBGCC_SPEC)
640 #define LIBGCC_SPEC REAL_LIBGCC_SPEC
641 #elif defined(LINK_LIBGCC_SPECIAL_1)
642 /* Have gcc do the search for libgcc.a. */
643 #define LIBGCC_SPEC "libgcc.a%s"
644 #else
645 #define LIBGCC_SPEC "-lgcc"
646 #endif
647 #endif
649 /* config.h can define STARTFILE_SPEC to override the default crt0 files. */
650 #ifndef STARTFILE_SPEC
651 #define STARTFILE_SPEC \
652 "%{!shared:%{pg:gcrt0%O%s}%{!pg:%{p:mcrt0%O%s}%{!p:crt0%O%s}}}"
653 #endif
655 /* config.h can define ENDFILE_SPEC to override the default crtn files. */
656 #ifndef ENDFILE_SPEC
657 #define ENDFILE_SPEC ""
658 #endif
660 #ifndef LINKER_NAME
661 #define LINKER_NAME "collect2"
662 #endif
664 #ifdef HAVE_AS_DEBUG_PREFIX_MAP
665 #define ASM_MAP " %{fdebug-prefix-map=*:--debug-prefix-map %*}"
666 #else
667 #define ASM_MAP ""
668 #endif
670 /* Assembler options for compressed debug sections. */
671 #if HAVE_LD_COMPRESS_DEBUG < 2
672 /* Reject if the linker cannot write compressed debug sections. */
673 #define ASM_COMPRESS_DEBUG_SPEC \
674 " %{gz*:%e-gz is not supported in this configuration} "
675 #else /* HAVE_LD_COMPRESS_DEBUG >= 2 */
676 #if HAVE_AS_COMPRESS_DEBUG == 0
677 /* No assembler support. Ignore silently. */
678 #define ASM_COMPRESS_DEBUG_SPEC \
679 " %{gz*:} "
680 #elif HAVE_AS_COMPRESS_DEBUG == 1
681 /* GNU style, GNU as options. */
682 #define ASM_COMPRESS_DEBUG_SPEC \
683 " %{gz|gz=zlib-gnu:" AS_COMPRESS_DEBUG_OPTION "}" \
684 " %{gz=none:" AS_NO_COMPRESS_DEBUG_OPTION "}" \
685 " %{gz=zlib:%e-gz=zlib is not supported in this configuration} "
686 #elif HAVE_AS_COMPRESS_DEBUG == 2
687 /* ELF gABI style. */
688 #define ASM_COMPRESS_DEBUG_SPEC \
689 " %{gz|gz=zlib:" AS_COMPRESS_DEBUG_OPTION "=zlib}" \
690 " %{gz=none:" AS_COMPRESS_DEBUG_OPTION "=none}" \
691 " %{gz=zlib-gnu:" AS_COMPRESS_DEBUG_OPTION "=zlib-gnu} "
692 #else
693 #error Unknown value for HAVE_AS_COMPRESS_DEBUG.
694 #endif
695 #endif /* HAVE_LD_COMPRESS_DEBUG >= 2 */
697 /* Define ASM_DEBUG_SPEC to be a spec suitable for translating '-g'
698 to the assembler. */
699 #ifndef ASM_DEBUG_SPEC
700 # if defined(DBX_DEBUGGING_INFO) && defined(DWARF2_DEBUGGING_INFO) \
701 && defined(HAVE_AS_GDWARF2_DEBUG_FLAG) && defined(HAVE_AS_GSTABS_DEBUG_FLAG)
702 # define ASM_DEBUG_SPEC \
703 (PREFERRED_DEBUGGING_TYPE == DBX_DEBUG \
704 ? "%{!g0:%{gdwarf*:--gdwarf2}%{!gdwarf*:%{g*:--gstabs}}}" ASM_MAP \
705 : "%{!g0:%{gstabs*:--gstabs}%{!gstabs*:%{g*:--gdwarf2}}}" ASM_MAP)
706 # else
707 # if defined(DBX_DEBUGGING_INFO) && defined(HAVE_AS_GSTABS_DEBUG_FLAG)
708 # define ASM_DEBUG_SPEC "%{g*:%{!g0:--gstabs}}" ASM_MAP
709 # endif
710 # if defined(DWARF2_DEBUGGING_INFO) && defined(HAVE_AS_GDWARF2_DEBUG_FLAG)
711 # define ASM_DEBUG_SPEC "%{g*:%{!g0:--gdwarf2}}" ASM_MAP
712 # endif
713 # endif
714 #endif
715 #ifndef ASM_DEBUG_SPEC
716 # define ASM_DEBUG_SPEC ""
717 #endif
719 /* Here is the spec for running the linker, after compiling all files. */
721 /* This is overridable by the target in case they need to specify the
722 -lgcc and -lc order specially, yet not require them to override all
723 of LINK_COMMAND_SPEC. */
724 #ifndef LINK_GCC_C_SEQUENCE_SPEC
725 #define LINK_GCC_C_SEQUENCE_SPEC "%G %L %G"
726 #endif
728 #ifndef LINK_SSP_SPEC
729 #ifdef TARGET_LIBC_PROVIDES_SSP
730 #define LINK_SSP_SPEC "%{fstack-protector|fstack-protector-all" \
731 "|fstack-protector-strong|fstack-protector-explicit:}"
732 #else
733 #define LINK_SSP_SPEC "%{fstack-protector|fstack-protector-all" \
734 "|fstack-protector-strong|fstack-protector-explicit" \
735 ":-lssp_nonshared -lssp}"
736 #endif
737 #endif
739 #ifdef ENABLE_DEFAULT_PIE
740 #define NO_PIE_SPEC "no-pie|static"
741 #define PIE_SPEC NO_PIE_SPEC "|r|shared:;"
742 #define NO_FPIE1_SPEC "fno-pie"
743 #define FPIE1_SPEC NO_FPIE1_SPEC ":;"
744 #define NO_FPIE2_SPEC "fno-PIE"
745 #define FPIE2_SPEC NO_FPIE2_SPEC ":;"
746 #define NO_FPIE_SPEC NO_FPIE1_SPEC "|" NO_FPIE2_SPEC
747 #define FPIE_SPEC NO_FPIE_SPEC ":;"
748 #define NO_FPIC1_SPEC "fno-pic"
749 #define FPIC1_SPEC NO_FPIC1_SPEC ":;"
750 #define NO_FPIC2_SPEC "fno-PIC"
751 #define FPIC2_SPEC NO_FPIC2_SPEC ":;"
752 #define NO_FPIC_SPEC NO_FPIC1_SPEC "|" NO_FPIC2_SPEC
753 #define FPIC_SPEC NO_FPIC_SPEC ":;"
754 #define NO_FPIE1_AND_FPIC1_SPEC NO_FPIE1_SPEC "|" NO_FPIC1_SPEC
755 #define FPIE1_OR_FPIC1_SPEC NO_FPIE1_AND_FPIC1_SPEC ":;"
756 #define NO_FPIE2_AND_FPIC2_SPEC NO_FPIE2_SPEC "|" NO_FPIC2_SPEC
757 #define FPIE2_OR_FPIC2_SPEC NO_FPIE2_AND_FPIC2_SPEC ":;"
758 #define NO_FPIE_AND_FPIC_SPEC NO_FPIE_SPEC "|" NO_FPIC_SPEC
759 #define FPIE_OR_FPIC_SPEC NO_FPIE_AND_FPIC_SPEC ":;"
760 #else
761 #define PIE_SPEC "pie"
762 #define NO_PIE_SPEC PIE_SPEC "|r|shared:;"
763 #define FPIE1_SPEC "fpie"
764 #define NO_FPIE1_SPEC FPIE1_SPEC ":;"
765 #define FPIE2_SPEC "fPIE"
766 #define NO_FPIE2_SPEC FPIE2_SPEC ":;"
767 #define FPIE_SPEC FPIE1_SPEC "|" FPIE2_SPEC
768 #define NO_FPIE_SPEC FPIE_SPEC ":;"
769 #define FPIC1_SPEC "fpic"
770 #define NO_FPIC1_SPEC FPIC1_SPEC ":;"
771 #define FPIC2_SPEC "fPIC"
772 #define NO_FPIC2_SPEC FPIC2_SPEC ":;"
773 #define FPIC_SPEC FPIC1_SPEC "|" FPIC2_SPEC
774 #define NO_FPIC_SPEC FPIC_SPEC ":;"
775 #define FPIE1_OR_FPIC1_SPEC FPIE1_SPEC "|" FPIC1_SPEC
776 #define NO_FPIE1_AND_FPIC1_SPEC FPIE1_OR_FPIC1_SPEC ":;"
777 #define FPIE2_OR_FPIC2_SPEC FPIE2_SPEC "|" FPIC2_SPEC
778 #define NO_FPIE2_AND_FPIC2_SPEC FPIE1_OR_FPIC2_SPEC ":;"
779 #define FPIE_OR_FPIC_SPEC FPIE_SPEC "|" FPIC_SPEC
780 #define NO_FPIE_AND_FPIC_SPEC FPIE_OR_FPIC_SPEC ":;"
781 #endif
783 #ifndef LINK_PIE_SPEC
784 #ifdef HAVE_LD_PIE
785 #define LD_PIE_SPEC "-pie"
786 #else
787 #define LD_PIE_SPEC ""
788 #endif
789 #define LINK_PIE_SPEC "%{no-pie:} " "%{" PIE_SPEC ":" LD_PIE_SPEC "} "
790 #endif
792 #ifndef LINK_BUILDID_SPEC
793 # if defined(HAVE_LD_BUILDID) && defined(ENABLE_LD_BUILDID)
794 # define LINK_BUILDID_SPEC "%{!r:--build-id} "
795 # endif
796 #endif
798 /* Conditional to test whether the LTO plugin is used or not.
799 FIXME: For slim LTO we will need to enable plugin unconditionally. This
800 still cause problems with PLUGIN_LD != LD and when plugin is built but
801 not useable. For GCC 4.6 we don't support slim LTO and thus we can enable
802 plugin only when LTO is enabled. We still honor explicit
803 -fuse-linker-plugin if the linker used understands -plugin. */
805 /* The linker has some plugin support. */
806 #if HAVE_LTO_PLUGIN > 0
807 /* The linker used has full plugin support, use LTO plugin by default. */
808 #if HAVE_LTO_PLUGIN == 2
809 #define PLUGIN_COND "!fno-use-linker-plugin:%{!fno-lto"
810 #define PLUGIN_COND_CLOSE "}"
811 #else
812 /* The linker used has limited plugin support, use LTO plugin with explicit
813 -fuse-linker-plugin. */
814 #define PLUGIN_COND "fuse-linker-plugin"
815 #define PLUGIN_COND_CLOSE ""
816 #endif
817 #define LINK_PLUGIN_SPEC \
818 "%{" PLUGIN_COND": \
819 -plugin %(linker_plugin_file) \
820 -plugin-opt=%(lto_wrapper) \
821 -plugin-opt=-fresolution=%u.res \
822 %{!nostdlib:%{!nodefaultlibs:%:pass-through-libs(%(link_gcc_c_sequence))}} \
823 }" PLUGIN_COND_CLOSE
824 #else
825 /* The linker used doesn't support -plugin, reject -fuse-linker-plugin. */
826 #define LINK_PLUGIN_SPEC "%{fuse-linker-plugin:\
827 %e-fuse-linker-plugin is not supported in this configuration}"
828 #endif
830 /* Linker command line options for -fsanitize= early on the command line. */
831 #ifndef SANITIZER_EARLY_SPEC
832 #define SANITIZER_EARLY_SPEC "\
833 %{!nostdlib:%{!nodefaultlibs:%{%:sanitize(address):" LIBASAN_EARLY_SPEC "} \
834 %{%:sanitize(thread):" LIBTSAN_EARLY_SPEC "} \
835 %{%:sanitize(leak):" LIBLSAN_EARLY_SPEC "}}}"
836 #endif
838 /* Linker command line options for -fsanitize= late on the command line. */
839 #ifndef SANITIZER_SPEC
840 #define SANITIZER_SPEC "\
841 %{!nostdlib:%{!nodefaultlibs:%{%:sanitize(address):" LIBASAN_SPEC "\
842 %{static:%ecannot specify -static with -fsanitize=address}}\
843 %{%:sanitize(thread):" LIBTSAN_SPEC "\
844 %{static:%ecannot specify -static with -fsanitize=thread}}\
845 %{%:sanitize(undefined):" LIBUBSAN_SPEC "}\
846 %{%:sanitize(leak):" LIBLSAN_SPEC "}}}"
847 #endif
849 /* This is the spec to use, once the code for creating the vtable
850 verification runtime library, libvtv.so, has been created. Currently
851 the vtable verification runtime functions are in libstdc++, so we use
852 the spec just below this one. */
853 #ifndef VTABLE_VERIFICATION_SPEC
854 #define VTABLE_VERIFICATION_SPEC "\
855 %{!nostdlib:%{fvtable-verify=std: -lvtv -u_vtable_map_vars_start -u_vtable_map_vars_end}\
856 %{fvtable-verify=preinit: -lvtv -u_vtable_map_vars_start -u_vtable_map_vars_end}}"
857 #endif
859 #ifndef CHKP_SPEC
860 #define CHKP_SPEC ""
861 #endif
863 /* -u* was put back because both BSD and SysV seem to support it. */
864 /* %{static:} simply prevents an error message if the target machine
865 doesn't handle -static. */
866 /* We want %{T*} after %{L*} and %D so that it can be used to specify linker
867 scripts which exist in user specified directories, or in standard
868 directories. */
869 /* We pass any -flto flags on to the linker, which is expected
870 to understand them. In practice, this means it had better be collect2. */
871 /* %{e*} includes -export-dynamic; see comment in common.opt. */
872 #ifndef LINK_COMMAND_SPEC
873 #define LINK_COMMAND_SPEC "\
874 %{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
875 %(linker) " \
876 LINK_PLUGIN_SPEC \
877 "%{flto|flto=*:%<fcompare-debug*} \
878 %{flto} %{fno-lto} %{flto=*} %l " LINK_PIE_SPEC \
879 "%{fuse-ld=*:-fuse-ld=%*} " LINK_COMPRESS_DEBUG_SPEC \
880 "%X %{o*} %{e*} %{N} %{n} %{r}\
881 %{s} %{t} %{u*} %{z} %{Z} %{!nostdlib:%{!nostartfiles:%S}} " VTABLE_VERIFICATION_SPEC " \
882 %{static:} %{L*} %(mfwrap) %(link_libgcc) " SANITIZER_EARLY_SPEC " %o\
883 " CHKP_SPEC " \
884 %{fopenacc|fopenmp|ftree-parallelize-loops=*:%:include(libgomp.spec)%(link_gomp)}\
885 %{fcilkplus:%:include(libcilkrts.spec)%(link_cilkrts)}\
886 %{fgnu-tm:%:include(libitm.spec)%(link_itm)}\
887 %(mflib) " STACK_SPLIT_SPEC "\
888 %{fprofile-arcs|fprofile-generate*|coverage:-lgcov} " SANITIZER_SPEC " \
889 %{!nostdlib:%{!nodefaultlibs:%(link_ssp) %(link_gcc_c_sequence)}}\
890 %{!nostdlib:%{!nostartfiles:%E}} %{T*} }}}}}}"
891 #endif
893 #ifndef LINK_LIBGCC_SPEC
894 /* Generate -L options for startfile prefix list. */
895 # define LINK_LIBGCC_SPEC "%D"
896 #endif
898 #ifndef STARTFILE_PREFIX_SPEC
899 # define STARTFILE_PREFIX_SPEC ""
900 #endif
902 #ifndef SYSROOT_SPEC
903 # define SYSROOT_SPEC "--sysroot=%R"
904 #endif
906 #ifndef SYSROOT_SUFFIX_SPEC
907 # define SYSROOT_SUFFIX_SPEC ""
908 #endif
910 #ifndef SYSROOT_HEADERS_SUFFIX_SPEC
911 # define SYSROOT_HEADERS_SUFFIX_SPEC ""
912 #endif
914 static const char *asm_debug = ASM_DEBUG_SPEC;
915 static const char *cpp_spec = CPP_SPEC;
916 static const char *cc1_spec = CC1_SPEC;
917 static const char *cc1plus_spec = CC1PLUS_SPEC;
918 static const char *link_gcc_c_sequence_spec = LINK_GCC_C_SEQUENCE_SPEC;
919 static const char *link_ssp_spec = LINK_SSP_SPEC;
920 static const char *asm_spec = ASM_SPEC;
921 static const char *asm_final_spec = ASM_FINAL_SPEC;
922 static const char *link_spec = LINK_SPEC;
923 static const char *lib_spec = LIB_SPEC;
924 static const char *link_gomp_spec = "";
925 static const char *libgcc_spec = LIBGCC_SPEC;
926 static const char *endfile_spec = ENDFILE_SPEC;
927 static const char *startfile_spec = STARTFILE_SPEC;
928 static const char *linker_name_spec = LINKER_NAME;
929 static const char *linker_plugin_file_spec = "";
930 static const char *lto_wrapper_spec = "";
931 static const char *lto_gcc_spec = "";
932 static const char *link_command_spec = LINK_COMMAND_SPEC;
933 static const char *link_libgcc_spec = LINK_LIBGCC_SPEC;
934 static const char *startfile_prefix_spec = STARTFILE_PREFIX_SPEC;
935 static const char *sysroot_spec = SYSROOT_SPEC;
936 static const char *sysroot_suffix_spec = SYSROOT_SUFFIX_SPEC;
937 static const char *sysroot_hdrs_suffix_spec = SYSROOT_HEADERS_SUFFIX_SPEC;
938 static const char *self_spec = "";
940 /* Standard options to cpp, cc1, and as, to reduce duplication in specs.
941 There should be no need to override these in target dependent files,
942 but we need to copy them to the specs file so that newer versions
943 of the GCC driver can correctly drive older tool chains with the
944 appropriate -B options. */
946 /* When cpplib handles traditional preprocessing, get rid of this, and
947 call cc1 (or cc1obj in objc/lang-specs.h) from the main specs so
948 that we default the front end language better. */
949 static const char *trad_capable_cpp =
950 "cc1 -E %{traditional|traditional-cpp:-traditional-cpp}";
952 /* We don't wrap .d files in %W{} since a missing .d file, and
953 therefore no dependency entry, confuses make into thinking a .o
954 file that happens to exist is up-to-date. */
955 static const char *cpp_unique_options =
956 "%{!Q:-quiet} %{nostdinc*} %{C} %{CC} %{v} %{I*&F*} %{P} %I\
957 %{MD:-MD %{!o:%b.d}%{o*:%.d%*}}\
958 %{MMD:-MMD %{!o:%b.d}%{o*:%.d%*}}\
959 %{M} %{MM} %{MF*} %{MG} %{MP} %{MQ*} %{MT*}\
960 %{!E:%{!M:%{!MM:%{!MT:%{!MQ:%{MD|MMD:%{o*:-MQ %*}}}}}}}\
961 %{remap} %{g3|ggdb3|gstabs3|gcoff3|gxcoff3|gvms3:-dD}\
962 %{!iplugindir*:%{fplugin*:%:find-plugindir()}}\
963 %{H} %C %{D*&U*&A*} %{i*} %Z %i\
964 %{E|M|MM:%W{o*}}";
966 /* This contains cpp options which are common with cc1_options and are passed
967 only when preprocessing only to avoid duplication. We pass the cc1 spec
968 options to the preprocessor so that it the cc1 spec may manipulate
969 options used to set target flags. Those special target flags settings may
970 in turn cause preprocessor symbols to be defined specially. */
971 static const char *cpp_options =
972 "%(cpp_unique_options) %1 %{m*} %{std*&ansi&trigraphs} %{W*&pedantic*} %{w}\
973 %{f*} %{g*:%{!g0:%{g*} %{!fno-working-directory:-fworking-directory}}} %{O*}\
974 %{undef} %{save-temps*:-fpch-preprocess}";
976 /* This contains cpp options which are not passed when the preprocessor
977 output will be used by another program. */
978 static const char *cpp_debug_options = "%{d*}";
980 /* NB: This is shared amongst all front-ends, except for Ada. */
981 static const char *cc1_options =
982 "%{pg:%{fomit-frame-pointer:%e-pg and -fomit-frame-pointer are incompatible}}\
983 %{!iplugindir*:%{fplugin*:%:find-plugindir()}}\
984 %1 %{!Q:-quiet} %{!dumpbase:-dumpbase %B} %{d*} %{m*} %{aux-info*}\
985 %{fcompare-debug-second:%:compare-debug-auxbase-opt(%b)} \
986 %{!fcompare-debug-second:%{c|S:%{o*:-auxbase-strip %*}%{!o*:-auxbase %b}}}%{!c:%{!S:-auxbase %b}} \
987 %{g*} %{O*} %{W*&pedantic*} %{w} %{std*&ansi&trigraphs}\
988 %{v:-version} %{pg:-p} %{p} %{f*} %{undef}\
989 %{Qn:-fno-ident} %{Qy:} %{-help:--help}\
990 %{-target-help:--target-help}\
991 %{-version:--version}\
992 %{-help=*:--help=%*}\
993 %{!fsyntax-only:%{S:%W{o*}%{!o*:-o %b.s}}}\
994 %{fsyntax-only:-o %j} %{-param*}\
995 %{coverage:-fprofile-arcs -ftest-coverage}";
997 static const char *asm_options =
998 "%{-target-help:%:print-asm-header()} "
999 #if HAVE_GNU_AS
1000 /* If GNU AS is used, then convert -w (no warnings), -I, and -v
1001 to the assembler equivalents. */
1002 "%{v} %{w:-W} %{I*} "
1003 #endif
1004 ASM_COMPRESS_DEBUG_SPEC
1005 "%a %Y %{c:%W{o*}%{!o*:-o %w%b%O}}%{!c:-o %d%w%u%O}";
1007 static const char *invoke_as =
1008 #ifdef AS_NEEDS_DASH_FOR_PIPED_INPUT
1009 "%{!fwpa*:\
1010 %{fcompare-debug=*|fdump-final-insns=*:%:compare-debug-dump-opt()}\
1011 %{!S:-o %|.s |\n as %(asm_options) %|.s %A }\
1013 #else
1014 "%{!fwpa*:\
1015 %{fcompare-debug=*|fdump-final-insns=*:%:compare-debug-dump-opt()}\
1016 %{!S:-o %|.s |\n as %(asm_options) %m.s %A }\
1018 #endif
1020 /* Some compilers have limits on line lengths, and the multilib_select
1021 and/or multilib_matches strings can be very long, so we build them at
1022 run time. */
1023 static struct obstack multilib_obstack;
1024 static const char *multilib_select;
1025 static const char *multilib_matches;
1026 static const char *multilib_defaults;
1027 static const char *multilib_exclusions;
1028 static const char *multilib_reuse;
1030 /* Check whether a particular argument is a default argument. */
1032 #ifndef MULTILIB_DEFAULTS
1033 #define MULTILIB_DEFAULTS { "" }
1034 #endif
1036 static const char *const multilib_defaults_raw[] = MULTILIB_DEFAULTS;
1038 #ifndef DRIVER_SELF_SPECS
1039 #define DRIVER_SELF_SPECS ""
1040 #endif
1042 /* Linking to libgomp implies pthreads. This is particularly important
1043 for targets that use different start files and suchlike. */
1044 #ifndef GOMP_SELF_SPECS
1045 #define GOMP_SELF_SPECS "%{fopenacc|fopenmp|ftree-parallelize-loops=*: " \
1046 "-pthread}"
1047 #endif
1049 /* Likewise for -fgnu-tm. */
1050 #ifndef GTM_SELF_SPECS
1051 #define GTM_SELF_SPECS "%{fgnu-tm: -pthread}"
1052 #endif
1054 /* Likewise for -fcilkplus. */
1055 #ifndef CILK_SELF_SPECS
1056 #define CILK_SELF_SPECS "%{fcilkplus: -pthread}"
1057 #endif
1059 static const char *const driver_self_specs[] = {
1060 "%{fdump-final-insns:-fdump-final-insns=.} %<fdump-final-insns",
1061 DRIVER_SELF_SPECS, CONFIGURE_SPECS, GOMP_SELF_SPECS, GTM_SELF_SPECS,
1062 CILK_SELF_SPECS
1065 #ifndef OPTION_DEFAULT_SPECS
1066 #define OPTION_DEFAULT_SPECS { "", "" }
1067 #endif
1069 struct default_spec
1071 const char *name;
1072 const char *spec;
1075 static const struct default_spec
1076 option_default_specs[] = { OPTION_DEFAULT_SPECS };
1078 struct user_specs
1080 struct user_specs *next;
1081 const char *filename;
1084 static struct user_specs *user_specs_head, *user_specs_tail;
1087 /* Record the mapping from file suffixes for compilation specs. */
1089 struct compiler
1091 const char *suffix; /* Use this compiler for input files
1092 whose names end in this suffix. */
1094 const char *spec; /* To use this compiler, run this spec. */
1096 const char *cpp_spec; /* If non-NULL, substitute this spec
1097 for `%C', rather than the usual
1098 cpp_spec. */
1099 const int combinable; /* If nonzero, compiler can deal with
1100 multiple source files at once (IMA). */
1101 const int needs_preprocessing; /* If nonzero, source files need to
1102 be run through a preprocessor. */
1105 /* Pointer to a vector of `struct compiler' that gives the spec for
1106 compiling a file, based on its suffix.
1107 A file that does not end in any of these suffixes will be passed
1108 unchanged to the loader and nothing else will be done to it.
1110 An entry containing two 0s is used to terminate the vector.
1112 If multiple entries match a file, the last matching one is used. */
1114 static struct compiler *compilers;
1116 /* Number of entries in `compilers', not counting the null terminator. */
1118 static int n_compilers;
1120 /* The default list of file name suffixes and their compilation specs. */
1122 static const struct compiler default_compilers[] =
1124 /* Add lists of suffixes of known languages here. If those languages
1125 were not present when we built the driver, we will hit these copies
1126 and be given a more meaningful error than "file not used since
1127 linking is not done". */
1128 {".m", "#Objective-C", 0, 0, 0}, {".mi", "#Objective-C", 0, 0, 0},
1129 {".mm", "#Objective-C++", 0, 0, 0}, {".M", "#Objective-C++", 0, 0, 0},
1130 {".mii", "#Objective-C++", 0, 0, 0},
1131 {".cc", "#C++", 0, 0, 0}, {".cxx", "#C++", 0, 0, 0},
1132 {".cpp", "#C++", 0, 0, 0}, {".cp", "#C++", 0, 0, 0},
1133 {".c++", "#C++", 0, 0, 0}, {".C", "#C++", 0, 0, 0},
1134 {".CPP", "#C++", 0, 0, 0}, {".ii", "#C++", 0, 0, 0},
1135 {".ads", "#Ada", 0, 0, 0}, {".adb", "#Ada", 0, 0, 0},
1136 {".f", "#Fortran", 0, 0, 0}, {".F", "#Fortran", 0, 0, 0},
1137 {".for", "#Fortran", 0, 0, 0}, {".FOR", "#Fortran", 0, 0, 0},
1138 {".ftn", "#Fortran", 0, 0, 0}, {".FTN", "#Fortran", 0, 0, 0},
1139 {".fpp", "#Fortran", 0, 0, 0}, {".FPP", "#Fortran", 0, 0, 0},
1140 {".f90", "#Fortran", 0, 0, 0}, {".F90", "#Fortran", 0, 0, 0},
1141 {".f95", "#Fortran", 0, 0, 0}, {".F95", "#Fortran", 0, 0, 0},
1142 {".f03", "#Fortran", 0, 0, 0}, {".F03", "#Fortran", 0, 0, 0},
1143 {".f08", "#Fortran", 0, 0, 0}, {".F08", "#Fortran", 0, 0, 0},
1144 {".r", "#Ratfor", 0, 0, 0},
1145 {".p", "#Pascal", 0, 0, 0}, {".pas", "#Pascal", 0, 0, 0},
1146 {".java", "#Java", 0, 0, 0}, {".class", "#Java", 0, 0, 0},
1147 {".zip", "#Java", 0, 0, 0}, {".jar", "#Java", 0, 0, 0},
1148 {".go", "#Go", 0, 1, 0},
1149 /* Next come the entries for C. */
1150 {".c", "@c", 0, 0, 1},
1151 {"@c",
1152 /* cc1 has an integrated ISO C preprocessor. We should invoke the
1153 external preprocessor if -save-temps is given. */
1154 "%{E|M|MM:%(trad_capable_cpp) %(cpp_options) %(cpp_debug_options)}\
1155 %{!E:%{!M:%{!MM:\
1156 %{traditional:\
1157 %eGNU C no longer supports -traditional without -E}\
1158 %{save-temps*|traditional-cpp|no-integrated-cpp:%(trad_capable_cpp) \
1159 %(cpp_options) -o %{save-temps*:%b.i} %{!save-temps*:%g.i} \n\
1160 cc1 -fpreprocessed %{save-temps*:%b.i} %{!save-temps*:%g.i} \
1161 %(cc1_options)}\
1162 %{!save-temps*:%{!traditional-cpp:%{!no-integrated-cpp:\
1163 cc1 %(cpp_unique_options) %(cc1_options)}}}\
1164 %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 1},
1165 {"-",
1166 "%{!E:%e-E or -x required when input is from standard input}\
1167 %(trad_capable_cpp) %(cpp_options) %(cpp_debug_options)", 0, 0, 0},
1168 {".h", "@c-header", 0, 0, 0},
1169 {"@c-header",
1170 /* cc1 has an integrated ISO C preprocessor. We should invoke the
1171 external preprocessor if -save-temps is given. */
1172 "%{E|M|MM:%(trad_capable_cpp) %(cpp_options) %(cpp_debug_options)}\
1173 %{!E:%{!M:%{!MM:\
1174 %{save-temps*|traditional-cpp|no-integrated-cpp:%(trad_capable_cpp) \
1175 %(cpp_options) -o %{save-temps*:%b.i} %{!save-temps*:%g.i} \n\
1176 cc1 -fpreprocessed %{save-temps*:%b.i} %{!save-temps*:%g.i} \
1177 %(cc1_options)\
1178 %{!fsyntax-only:-o %g.s \
1179 %{!fdump-ada-spec*:%{!o*:--output-pch=%i.gch}\
1180 %W{o*:--output-pch=%*}}%V}}\
1181 %{!save-temps*:%{!traditional-cpp:%{!no-integrated-cpp:\
1182 cc1 %(cpp_unique_options) %(cc1_options)\
1183 %{!fsyntax-only:-o %g.s \
1184 %{!fdump-ada-spec*:%{!o*:--output-pch=%i.gch}\
1185 %W{o*:--output-pch=%*}}%V}}}}}}}", 0, 0, 0},
1186 {".i", "@cpp-output", 0, 0, 0},
1187 {"@cpp-output",
1188 "%{!M:%{!MM:%{!E:cc1 -fpreprocessed %i %(cc1_options) %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0},
1189 {".s", "@assembler", 0, 0, 0},
1190 {"@assembler",
1191 "%{!M:%{!MM:%{!E:%{!S:as %(asm_debug) %(asm_options) %i %A }}}}", 0, 0, 0},
1192 {".sx", "@assembler-with-cpp", 0, 0, 0},
1193 {".S", "@assembler-with-cpp", 0, 0, 0},
1194 {"@assembler-with-cpp",
1195 #ifdef AS_NEEDS_DASH_FOR_PIPED_INPUT
1196 "%(trad_capable_cpp) -lang-asm %(cpp_options) -fno-directives-only\
1197 %{E|M|MM:%(cpp_debug_options)}\
1198 %{!M:%{!MM:%{!E:%{!S:-o %|.s |\n\
1199 as %(asm_debug) %(asm_options) %|.s %A }}}}"
1200 #else
1201 "%(trad_capable_cpp) -lang-asm %(cpp_options) -fno-directives-only\
1202 %{E|M|MM:%(cpp_debug_options)}\
1203 %{!M:%{!MM:%{!E:%{!S:-o %|.s |\n\
1204 as %(asm_debug) %(asm_options) %m.s %A }}}}"
1205 #endif
1206 , 0, 0, 0},
1208 #include "specs.h"
1209 /* Mark end of table. */
1210 {0, 0, 0, 0, 0}
1213 /* Number of elements in default_compilers, not counting the terminator. */
1215 static const int n_default_compilers = ARRAY_SIZE (default_compilers) - 1;
1217 typedef char *char_p; /* For DEF_VEC_P. */
1219 /* A vector of options to give to the linker.
1220 These options are accumulated by %x,
1221 and substituted into the linker command with %X. */
1222 static vec<char_p> linker_options;
1224 /* A vector of options to give to the assembler.
1225 These options are accumulated by -Wa,
1226 and substituted into the assembler command with %Y. */
1227 static vec<char_p> assembler_options;
1229 /* A vector of options to give to the preprocessor.
1230 These options are accumulated by -Wp,
1231 and substituted into the preprocessor command with %Z. */
1232 static vec<char_p> preprocessor_options;
1234 static char *
1235 skip_whitespace (char *p)
1237 while (1)
1239 /* A fully-blank line is a delimiter in the SPEC file and shouldn't
1240 be considered whitespace. */
1241 if (p[0] == '\n' && p[1] == '\n' && p[2] == '\n')
1242 return p + 1;
1243 else if (*p == '\n' || *p == ' ' || *p == '\t')
1244 p++;
1245 else if (*p == '#')
1247 while (*p != '\n')
1248 p++;
1249 p++;
1251 else
1252 break;
1255 return p;
1257 /* Structures to keep track of prefixes to try when looking for files. */
1259 struct prefix_list
1261 const char *prefix; /* String to prepend to the path. */
1262 struct prefix_list *next; /* Next in linked list. */
1263 int require_machine_suffix; /* Don't use without machine_suffix. */
1264 /* 2 means try both machine_suffix and just_machine_suffix. */
1265 int priority; /* Sort key - priority within list. */
1266 int os_multilib; /* 1 if OS multilib scheme should be used,
1267 0 for GCC multilib scheme. */
1270 struct path_prefix
1272 struct prefix_list *plist; /* List of prefixes to try */
1273 int max_len; /* Max length of a prefix in PLIST */
1274 const char *name; /* Name of this list (used in config stuff) */
1277 /* List of prefixes to try when looking for executables. */
1279 static struct path_prefix exec_prefixes = { 0, 0, "exec" };
1281 /* List of prefixes to try when looking for startup (crt0) files. */
1283 static struct path_prefix startfile_prefixes = { 0, 0, "startfile" };
1285 /* List of prefixes to try when looking for include files. */
1287 static struct path_prefix include_prefixes = { 0, 0, "include" };
1289 /* Suffix to attach to directories searched for commands.
1290 This looks like `MACHINE/VERSION/'. */
1292 static const char *machine_suffix = 0;
1294 /* Suffix to attach to directories searched for commands.
1295 This is just `MACHINE/'. */
1297 static const char *just_machine_suffix = 0;
1299 /* Adjusted value of GCC_EXEC_PREFIX envvar. */
1301 static const char *gcc_exec_prefix;
1303 /* Adjusted value of standard_libexec_prefix. */
1305 static const char *gcc_libexec_prefix;
1307 /* Default prefixes to attach to command names. */
1309 #ifndef STANDARD_STARTFILE_PREFIX_1
1310 #define STANDARD_STARTFILE_PREFIX_1 "/lib/"
1311 #endif
1312 #ifndef STANDARD_STARTFILE_PREFIX_2
1313 #define STANDARD_STARTFILE_PREFIX_2 "/usr/lib/"
1314 #endif
1316 #ifdef CROSS_DIRECTORY_STRUCTURE /* Don't use these prefixes for a cross compiler. */
1317 #undef MD_EXEC_PREFIX
1318 #undef MD_STARTFILE_PREFIX
1319 #undef MD_STARTFILE_PREFIX_1
1320 #endif
1322 /* If no prefixes defined, use the null string, which will disable them. */
1323 #ifndef MD_EXEC_PREFIX
1324 #define MD_EXEC_PREFIX ""
1325 #endif
1326 #ifndef MD_STARTFILE_PREFIX
1327 #define MD_STARTFILE_PREFIX ""
1328 #endif
1329 #ifndef MD_STARTFILE_PREFIX_1
1330 #define MD_STARTFILE_PREFIX_1 ""
1331 #endif
1333 /* These directories are locations set at configure-time based on the
1334 --prefix option provided to configure. Their initializers are
1335 defined in Makefile.in. These paths are not *directly* used when
1336 gcc_exec_prefix is set because, in that case, we know where the
1337 compiler has been installed, and use paths relative to that
1338 location instead. */
1339 static const char *const standard_exec_prefix = STANDARD_EXEC_PREFIX;
1340 static const char *const standard_libexec_prefix = STANDARD_LIBEXEC_PREFIX;
1341 static const char *const standard_bindir_prefix = STANDARD_BINDIR_PREFIX;
1342 static const char *const standard_startfile_prefix = STANDARD_STARTFILE_PREFIX;
1344 /* For native compilers, these are well-known paths containing
1345 components that may be provided by the system. For cross
1346 compilers, these paths are not used. */
1347 static const char *md_exec_prefix = MD_EXEC_PREFIX;
1348 static const char *md_startfile_prefix = MD_STARTFILE_PREFIX;
1349 static const char *md_startfile_prefix_1 = MD_STARTFILE_PREFIX_1;
1350 static const char *const standard_startfile_prefix_1
1351 = STANDARD_STARTFILE_PREFIX_1;
1352 static const char *const standard_startfile_prefix_2
1353 = STANDARD_STARTFILE_PREFIX_2;
1355 /* A relative path to be used in finding the location of tools
1356 relative to the driver. */
1357 static const char *const tooldir_base_prefix = TOOLDIR_BASE_PREFIX;
1359 /* A prefix to be used when this is an accelerator compiler. */
1360 static const char *const accel_dir_suffix = ACCEL_DIR_SUFFIX;
1362 /* Subdirectory to use for locating libraries. Set by
1363 set_multilib_dir based on the compilation options. */
1365 static const char *multilib_dir;
1367 /* Subdirectory to use for locating libraries in OS conventions. Set by
1368 set_multilib_dir based on the compilation options. */
1370 static const char *multilib_os_dir;
1372 /* Subdirectory to use for locating libraries in multiarch conventions. Set by
1373 set_multilib_dir based on the compilation options. */
1375 static const char *multiarch_dir;
1377 /* Structure to keep track of the specs that have been defined so far.
1378 These are accessed using %(specname) in a compiler or link
1379 spec. */
1381 struct spec_list
1383 /* The following 2 fields must be first */
1384 /* to allow EXTRA_SPECS to be initialized */
1385 const char *name; /* name of the spec. */
1386 const char *ptr; /* available ptr if no static pointer */
1388 /* The following fields are not initialized */
1389 /* by EXTRA_SPECS */
1390 const char **ptr_spec; /* pointer to the spec itself. */
1391 struct spec_list *next; /* Next spec in linked list. */
1392 int name_len; /* length of the name */
1393 bool user_p; /* whether string come from file spec. */
1394 bool alloc_p; /* whether string was allocated */
1397 #define INIT_STATIC_SPEC(NAME,PTR) \
1398 { NAME, NULL, PTR, (struct spec_list *) 0, sizeof (NAME) - 1, false, false }
1400 /* List of statically defined specs. */
1401 static struct spec_list static_specs[] =
1403 INIT_STATIC_SPEC ("asm", &asm_spec),
1404 INIT_STATIC_SPEC ("asm_debug", &asm_debug),
1405 INIT_STATIC_SPEC ("asm_final", &asm_final_spec),
1406 INIT_STATIC_SPEC ("asm_options", &asm_options),
1407 INIT_STATIC_SPEC ("invoke_as", &invoke_as),
1408 INIT_STATIC_SPEC ("cpp", &cpp_spec),
1409 INIT_STATIC_SPEC ("cpp_options", &cpp_options),
1410 INIT_STATIC_SPEC ("cpp_debug_options", &cpp_debug_options),
1411 INIT_STATIC_SPEC ("cpp_unique_options", &cpp_unique_options),
1412 INIT_STATIC_SPEC ("trad_capable_cpp", &trad_capable_cpp),
1413 INIT_STATIC_SPEC ("cc1", &cc1_spec),
1414 INIT_STATIC_SPEC ("cc1_options", &cc1_options),
1415 INIT_STATIC_SPEC ("cc1plus", &cc1plus_spec),
1416 INIT_STATIC_SPEC ("link_gcc_c_sequence", &link_gcc_c_sequence_spec),
1417 INIT_STATIC_SPEC ("link_ssp", &link_ssp_spec),
1418 INIT_STATIC_SPEC ("endfile", &endfile_spec),
1419 INIT_STATIC_SPEC ("link", &link_spec),
1420 INIT_STATIC_SPEC ("lib", &lib_spec),
1421 INIT_STATIC_SPEC ("link_gomp", &link_gomp_spec),
1422 INIT_STATIC_SPEC ("libgcc", &libgcc_spec),
1423 INIT_STATIC_SPEC ("startfile", &startfile_spec),
1424 INIT_STATIC_SPEC ("cross_compile", &cross_compile),
1425 INIT_STATIC_SPEC ("version", &compiler_version),
1426 INIT_STATIC_SPEC ("multilib", &multilib_select),
1427 INIT_STATIC_SPEC ("multilib_defaults", &multilib_defaults),
1428 INIT_STATIC_SPEC ("multilib_extra", &multilib_extra),
1429 INIT_STATIC_SPEC ("multilib_matches", &multilib_matches),
1430 INIT_STATIC_SPEC ("multilib_exclusions", &multilib_exclusions),
1431 INIT_STATIC_SPEC ("multilib_options", &multilib_options),
1432 INIT_STATIC_SPEC ("multilib_reuse", &multilib_reuse),
1433 INIT_STATIC_SPEC ("linker", &linker_name_spec),
1434 INIT_STATIC_SPEC ("linker_plugin_file", &linker_plugin_file_spec),
1435 INIT_STATIC_SPEC ("lto_wrapper", &lto_wrapper_spec),
1436 INIT_STATIC_SPEC ("lto_gcc", &lto_gcc_spec),
1437 INIT_STATIC_SPEC ("link_libgcc", &link_libgcc_spec),
1438 INIT_STATIC_SPEC ("md_exec_prefix", &md_exec_prefix),
1439 INIT_STATIC_SPEC ("md_startfile_prefix", &md_startfile_prefix),
1440 INIT_STATIC_SPEC ("md_startfile_prefix_1", &md_startfile_prefix_1),
1441 INIT_STATIC_SPEC ("startfile_prefix_spec", &startfile_prefix_spec),
1442 INIT_STATIC_SPEC ("sysroot_spec", &sysroot_spec),
1443 INIT_STATIC_SPEC ("sysroot_suffix_spec", &sysroot_suffix_spec),
1444 INIT_STATIC_SPEC ("sysroot_hdrs_suffix_spec", &sysroot_hdrs_suffix_spec),
1445 INIT_STATIC_SPEC ("self_spec", &self_spec),
1448 #ifdef EXTRA_SPECS /* additional specs needed */
1449 /* Structure to keep track of just the first two args of a spec_list.
1450 That is all that the EXTRA_SPECS macro gives us. */
1451 struct spec_list_1
1453 const char *const name;
1454 const char *const ptr;
1457 static const struct spec_list_1 extra_specs_1[] = { EXTRA_SPECS };
1458 static struct spec_list *extra_specs = (struct spec_list *) 0;
1459 #endif
1461 /* List of dynamically allocates specs that have been defined so far. */
1463 static struct spec_list *specs = (struct spec_list *) 0;
1465 /* List of static spec functions. */
1467 static const struct spec_function static_spec_functions[] =
1469 { "getenv", getenv_spec_function },
1470 { "if-exists", if_exists_spec_function },
1471 { "if-exists-else", if_exists_else_spec_function },
1472 { "sanitize", sanitize_spec_function },
1473 { "replace-outfile", replace_outfile_spec_function },
1474 { "remove-outfile", remove_outfile_spec_function },
1475 { "version-compare", version_compare_spec_function },
1476 { "include", include_spec_function },
1477 { "find-file", find_file_spec_function },
1478 { "find-plugindir", find_plugindir_spec_function },
1479 { "print-asm-header", print_asm_header_spec_function },
1480 { "compare-debug-dump-opt", compare_debug_dump_opt_spec_function },
1481 { "compare-debug-self-opt", compare_debug_self_opt_spec_function },
1482 { "compare-debug-auxbase-opt", compare_debug_auxbase_opt_spec_function },
1483 { "pass-through-libs", pass_through_libs_spec_func },
1484 { "replace-extension", replace_extension_spec_func },
1485 #ifdef EXTRA_SPEC_FUNCTIONS
1486 EXTRA_SPEC_FUNCTIONS
1487 #endif
1488 { 0, 0 }
1491 static int processing_spec_function;
1493 /* Add appropriate libgcc specs to OBSTACK, taking into account
1494 various permutations of -shared-libgcc, -shared, and such. */
1496 #if defined(ENABLE_SHARED_LIBGCC) && !defined(REAL_LIBGCC_SPEC)
1498 #ifndef USE_LD_AS_NEEDED
1499 #define USE_LD_AS_NEEDED 0
1500 #endif
1502 static void
1503 init_gcc_specs (struct obstack *obstack, const char *shared_name,
1504 const char *static_name, const char *eh_name)
1506 char *buf;
1508 buf = concat ("%{static|static-libgcc:", static_name, " ", eh_name, "}"
1509 "%{!static:%{!static-libgcc:"
1510 #if USE_LD_AS_NEEDED
1511 "%{!shared-libgcc:",
1512 static_name, " " LD_AS_NEEDED_OPTION " ",
1513 shared_name, " " LD_NO_AS_NEEDED_OPTION
1515 "%{shared-libgcc:",
1516 shared_name, "%{!shared: ", static_name, "}"
1518 #else
1519 "%{!shared:"
1520 "%{!shared-libgcc:", static_name, " ", eh_name, "}"
1521 "%{shared-libgcc:", shared_name, " ", static_name, "}"
1523 #ifdef LINK_EH_SPEC
1524 "%{shared:"
1525 "%{shared-libgcc:", shared_name, "}"
1526 "%{!shared-libgcc:", static_name, "}"
1528 #else
1529 "%{shared:", shared_name, "}"
1530 #endif
1531 #endif
1532 "}}", NULL);
1534 obstack_grow (obstack, buf, strlen (buf));
1535 free (buf);
1537 #endif /* ENABLE_SHARED_LIBGCC */
1539 /* Initialize the specs lookup routines. */
1541 static void
1542 init_spec (void)
1544 struct spec_list *next = (struct spec_list *) 0;
1545 struct spec_list *sl = (struct spec_list *) 0;
1546 int i;
1548 if (specs)
1549 return; /* Already initialized. */
1551 if (verbose_flag)
1552 fnotice (stderr, "Using built-in specs.\n");
1554 #ifdef EXTRA_SPECS
1555 extra_specs = XCNEWVEC (struct spec_list, ARRAY_SIZE (extra_specs_1));
1557 for (i = ARRAY_SIZE (extra_specs_1) - 1; i >= 0; i--)
1559 sl = &extra_specs[i];
1560 sl->name = extra_specs_1[i].name;
1561 sl->ptr = extra_specs_1[i].ptr;
1562 sl->next = next;
1563 sl->name_len = strlen (sl->name);
1564 sl->ptr_spec = &sl->ptr;
1565 next = sl;
1567 #endif
1569 for (i = ARRAY_SIZE (static_specs) - 1; i >= 0; i--)
1571 sl = &static_specs[i];
1572 sl->next = next;
1573 next = sl;
1576 #if defined(ENABLE_SHARED_LIBGCC) && !defined(REAL_LIBGCC_SPEC)
1577 /* ??? If neither -shared-libgcc nor --static-libgcc was
1578 seen, then we should be making an educated guess. Some proposed
1579 heuristics for ELF include:
1581 (1) If "-Wl,--export-dynamic", then it's a fair bet that the
1582 program will be doing dynamic loading, which will likely
1583 need the shared libgcc.
1585 (2) If "-ldl", then it's also a fair bet that we're doing
1586 dynamic loading.
1588 (3) For each ET_DYN we're linking against (either through -lfoo
1589 or /some/path/foo.so), check to see whether it or one of
1590 its dependencies depends on a shared libgcc.
1592 (4) If "-shared"
1594 If the runtime is fixed to look for program headers instead
1595 of calling __register_frame_info at all, for each object,
1596 use the shared libgcc if any EH symbol referenced.
1598 If crtstuff is fixed to not invoke __register_frame_info
1599 automatically, for each object, use the shared libgcc if
1600 any non-empty unwind section found.
1602 Doing any of this probably requires invoking an external program to
1603 do the actual object file scanning. */
1605 const char *p = libgcc_spec;
1606 int in_sep = 1;
1608 /* Transform the extant libgcc_spec into one that uses the shared libgcc
1609 when given the proper command line arguments. */
1610 while (*p)
1612 if (in_sep && *p == '-' && strncmp (p, "-lgcc", 5) == 0)
1614 init_gcc_specs (&obstack,
1615 "-lgcc_s"
1616 #ifdef USE_LIBUNWIND_EXCEPTIONS
1617 " -lunwind"
1618 #endif
1620 "-lgcc",
1621 "-lgcc_eh"
1622 #ifdef USE_LIBUNWIND_EXCEPTIONS
1623 # ifdef HAVE_LD_STATIC_DYNAMIC
1624 " %{!static:" LD_STATIC_OPTION "} -lunwind"
1625 " %{!static:" LD_DYNAMIC_OPTION "}"
1626 # else
1627 " -lunwind"
1628 # endif
1629 #endif
1632 p += 5;
1633 in_sep = 0;
1635 else if (in_sep && *p == 'l' && strncmp (p, "libgcc.a%s", 10) == 0)
1637 /* Ug. We don't know shared library extensions. Hope that
1638 systems that use this form don't do shared libraries. */
1639 init_gcc_specs (&obstack,
1640 "-lgcc_s",
1641 "libgcc.a%s",
1642 "libgcc_eh.a%s"
1643 #ifdef USE_LIBUNWIND_EXCEPTIONS
1644 " -lunwind"
1645 #endif
1647 p += 10;
1648 in_sep = 0;
1650 else
1652 obstack_1grow (&obstack, *p);
1653 in_sep = (*p == ' ');
1654 p += 1;
1658 obstack_1grow (&obstack, '\0');
1659 libgcc_spec = XOBFINISH (&obstack, const char *);
1661 #endif
1662 #ifdef USE_AS_TRADITIONAL_FORMAT
1663 /* Prepend "--traditional-format" to whatever asm_spec we had before. */
1665 static const char tf[] = "--traditional-format ";
1666 obstack_grow (&obstack, tf, sizeof (tf) - 1);
1667 obstack_grow0 (&obstack, asm_spec, strlen (asm_spec));
1668 asm_spec = XOBFINISH (&obstack, const char *);
1670 #endif
1672 #if defined LINK_EH_SPEC || defined LINK_BUILDID_SPEC || \
1673 defined LINKER_HASH_STYLE
1674 # ifdef LINK_BUILDID_SPEC
1675 /* Prepend LINK_BUILDID_SPEC to whatever link_spec we had before. */
1676 obstack_grow (&obstack, LINK_BUILDID_SPEC, sizeof (LINK_BUILDID_SPEC) - 1);
1677 # endif
1678 # ifdef LINK_EH_SPEC
1679 /* Prepend LINK_EH_SPEC to whatever link_spec we had before. */
1680 obstack_grow (&obstack, LINK_EH_SPEC, sizeof (LINK_EH_SPEC) - 1);
1681 # endif
1682 # ifdef LINKER_HASH_STYLE
1683 /* Prepend --hash-style=LINKER_HASH_STYLE to whatever link_spec we had
1684 before. */
1686 static const char hash_style[] = "--hash-style=";
1687 obstack_grow (&obstack, hash_style, sizeof (hash_style) - 1);
1688 obstack_grow (&obstack, LINKER_HASH_STYLE, sizeof (LINKER_HASH_STYLE) - 1);
1689 obstack_1grow (&obstack, ' ');
1691 # endif
1692 obstack_grow0 (&obstack, link_spec, strlen (link_spec));
1693 link_spec = XOBFINISH (&obstack, const char *);
1694 #endif
1696 specs = sl;
1699 /* Change the value of spec NAME to SPEC. If SPEC is empty, then the spec is
1700 removed; If the spec starts with a + then SPEC is added to the end of the
1701 current spec. */
1703 static void
1704 set_spec (const char *name, const char *spec, bool user_p)
1706 struct spec_list *sl;
1707 const char *old_spec;
1708 int name_len = strlen (name);
1709 int i;
1711 /* If this is the first call, initialize the statically allocated specs. */
1712 if (!specs)
1714 struct spec_list *next = (struct spec_list *) 0;
1715 for (i = ARRAY_SIZE (static_specs) - 1; i >= 0; i--)
1717 sl = &static_specs[i];
1718 sl->next = next;
1719 next = sl;
1721 specs = sl;
1724 /* See if the spec already exists. */
1725 for (sl = specs; sl; sl = sl->next)
1726 if (name_len == sl->name_len && !strcmp (sl->name, name))
1727 break;
1729 if (!sl)
1731 /* Not found - make it. */
1732 sl = XNEW (struct spec_list);
1733 sl->name = xstrdup (name);
1734 sl->name_len = name_len;
1735 sl->ptr_spec = &sl->ptr;
1736 sl->alloc_p = 0;
1737 *(sl->ptr_spec) = "";
1738 sl->next = specs;
1739 specs = sl;
1742 old_spec = *(sl->ptr_spec);
1743 *(sl->ptr_spec) = ((spec[0] == '+' && ISSPACE ((unsigned char)spec[1]))
1744 ? concat (old_spec, spec + 1, NULL)
1745 : xstrdup (spec));
1747 #ifdef DEBUG_SPECS
1748 if (verbose_flag)
1749 fnotice (stderr, "Setting spec %s to '%s'\n\n", name, *(sl->ptr_spec));
1750 #endif
1752 /* Free the old spec. */
1753 if (old_spec && sl->alloc_p)
1754 free (CONST_CAST (char *, old_spec));
1756 sl->user_p = user_p;
1757 sl->alloc_p = true;
1760 /* Accumulate a command (program name and args), and run it. */
1762 typedef const char *const_char_p; /* For DEF_VEC_P. */
1764 /* Vector of pointers to arguments in the current line of specifications. */
1766 static vec<const_char_p> argbuf;
1768 /* Were the options -c, -S or -E passed. */
1769 static int have_c = 0;
1771 /* Was the option -o passed. */
1772 static int have_o = 0;
1774 /* Pointer to output file name passed in with -o. */
1775 static const char *output_file = 0;
1777 /* This is the list of suffixes and codes (%g/%u/%U/%j) and the associated
1778 temp file. If the HOST_BIT_BUCKET is used for %j, no entry is made for
1779 it here. */
1781 static struct temp_name {
1782 const char *suffix; /* suffix associated with the code. */
1783 int length; /* strlen (suffix). */
1784 int unique; /* Indicates whether %g or %u/%U was used. */
1785 const char *filename; /* associated filename. */
1786 int filename_length; /* strlen (filename). */
1787 struct temp_name *next;
1788 } *temp_names;
1790 /* Number of commands executed so far. */
1792 static int execution_count;
1794 /* Number of commands that exited with a signal. */
1796 static int signal_count;
1798 /* Allocate the argument vector. */
1800 static void
1801 alloc_args (void)
1803 argbuf.create (10);
1806 /* Clear out the vector of arguments (after a command is executed). */
1808 static void
1809 clear_args (void)
1811 argbuf.truncate (0);
1814 /* Add one argument to the vector at the end.
1815 This is done when a space is seen or at the end of the line.
1816 If DELETE_ALWAYS is nonzero, the arg is a filename
1817 and the file should be deleted eventually.
1818 If DELETE_FAILURE is nonzero, the arg is a filename
1819 and the file should be deleted if this compilation fails. */
1821 static void
1822 store_arg (const char *arg, int delete_always, int delete_failure)
1824 argbuf.safe_push (arg);
1826 if (delete_always || delete_failure)
1828 const char *p;
1829 /* If the temporary file we should delete is specified as
1830 part of a joined argument extract the filename. */
1831 if (arg[0] == '-'
1832 && (p = strrchr (arg, '=')))
1833 arg = p + 1;
1834 record_temp_file (arg, delete_always, delete_failure);
1838 /* Load specs from a file name named FILENAME, replacing occurrences of
1839 various different types of line-endings, \r\n, \n\r and just \r, with
1840 a single \n. */
1842 static char *
1843 load_specs (const char *filename)
1845 int desc;
1846 int readlen;
1847 struct stat statbuf;
1848 char *buffer;
1849 char *buffer_p;
1850 char *specs;
1851 char *specs_p;
1853 if (verbose_flag)
1854 fnotice (stderr, "Reading specs from %s\n", filename);
1856 /* Open and stat the file. */
1857 desc = open (filename, O_RDONLY, 0);
1858 if (desc < 0)
1859 pfatal_with_name (filename);
1860 if (stat (filename, &statbuf) < 0)
1861 pfatal_with_name (filename);
1863 /* Read contents of file into BUFFER. */
1864 buffer = XNEWVEC (char, statbuf.st_size + 1);
1865 readlen = read (desc, buffer, (unsigned) statbuf.st_size);
1866 if (readlen < 0)
1867 pfatal_with_name (filename);
1868 buffer[readlen] = 0;
1869 close (desc);
1871 specs = XNEWVEC (char, readlen + 1);
1872 specs_p = specs;
1873 for (buffer_p = buffer; buffer_p && *buffer_p; buffer_p++)
1875 int skip = 0;
1876 char c = *buffer_p;
1877 if (c == '\r')
1879 if (buffer_p > buffer && *(buffer_p - 1) == '\n') /* \n\r */
1880 skip = 1;
1881 else if (*(buffer_p + 1) == '\n') /* \r\n */
1882 skip = 1;
1883 else /* \r */
1884 c = '\n';
1886 if (! skip)
1887 *specs_p++ = c;
1889 *specs_p = '\0';
1891 free (buffer);
1892 return (specs);
1895 /* Read compilation specs from a file named FILENAME,
1896 replacing the default ones.
1898 A suffix which starts with `*' is a definition for
1899 one of the machine-specific sub-specs. The "suffix" should be
1900 *asm, *cc1, *cpp, *link, *startfile, etc.
1901 The corresponding spec is stored in asm_spec, etc.,
1902 rather than in the `compilers' vector.
1904 Anything invalid in the file is a fatal error. */
1906 static void
1907 read_specs (const char *filename, bool main_p, bool user_p)
1909 char *buffer;
1910 char *p;
1912 buffer = load_specs (filename);
1914 /* Scan BUFFER for specs, putting them in the vector. */
1915 p = buffer;
1916 while (1)
1918 char *suffix;
1919 char *spec;
1920 char *in, *out, *p1, *p2, *p3;
1922 /* Advance P in BUFFER to the next nonblank nocomment line. */
1923 p = skip_whitespace (p);
1924 if (*p == 0)
1925 break;
1927 /* Is this a special command that starts with '%'? */
1928 /* Don't allow this for the main specs file, since it would
1929 encourage people to overwrite it. */
1930 if (*p == '%' && !main_p)
1932 p1 = p;
1933 while (*p && *p != '\n')
1934 p++;
1936 /* Skip '\n'. */
1937 p++;
1939 if (!strncmp (p1, "%include", sizeof ("%include") - 1)
1940 && (p1[sizeof "%include" - 1] == ' '
1941 || p1[sizeof "%include" - 1] == '\t'))
1943 char *new_filename;
1945 p1 += sizeof ("%include");
1946 while (*p1 == ' ' || *p1 == '\t')
1947 p1++;
1949 if (*p1++ != '<' || p[-2] != '>')
1950 fatal_error (input_location,
1951 "specs %%include syntax malformed after "
1952 "%ld characters",
1953 (long) (p1 - buffer + 1));
1955 p[-2] = '\0';
1956 new_filename = find_a_file (&startfile_prefixes, p1, R_OK, true);
1957 read_specs (new_filename ? new_filename : p1, false, user_p);
1958 continue;
1960 else if (!strncmp (p1, "%include_noerr", sizeof "%include_noerr" - 1)
1961 && (p1[sizeof "%include_noerr" - 1] == ' '
1962 || p1[sizeof "%include_noerr" - 1] == '\t'))
1964 char *new_filename;
1966 p1 += sizeof "%include_noerr";
1967 while (*p1 == ' ' || *p1 == '\t')
1968 p1++;
1970 if (*p1++ != '<' || p[-2] != '>')
1971 fatal_error (input_location,
1972 "specs %%include syntax malformed after "
1973 "%ld characters",
1974 (long) (p1 - buffer + 1));
1976 p[-2] = '\0';
1977 new_filename = find_a_file (&startfile_prefixes, p1, R_OK, true);
1978 if (new_filename)
1979 read_specs (new_filename, false, user_p);
1980 else if (verbose_flag)
1981 fnotice (stderr, "could not find specs file %s\n", p1);
1982 continue;
1984 else if (!strncmp (p1, "%rename", sizeof "%rename" - 1)
1985 && (p1[sizeof "%rename" - 1] == ' '
1986 || p1[sizeof "%rename" - 1] == '\t'))
1988 int name_len;
1989 struct spec_list *sl;
1990 struct spec_list *newsl;
1992 /* Get original name. */
1993 p1 += sizeof "%rename";
1994 while (*p1 == ' ' || *p1 == '\t')
1995 p1++;
1997 if (! ISALPHA ((unsigned char) *p1))
1998 fatal_error (input_location,
1999 "specs %%rename syntax malformed after "
2000 "%ld characters",
2001 (long) (p1 - buffer));
2003 p2 = p1;
2004 while (*p2 && !ISSPACE ((unsigned char) *p2))
2005 p2++;
2007 if (*p2 != ' ' && *p2 != '\t')
2008 fatal_error (input_location,
2009 "specs %%rename syntax malformed after "
2010 "%ld characters",
2011 (long) (p2 - buffer));
2013 name_len = p2 - p1;
2014 *p2++ = '\0';
2015 while (*p2 == ' ' || *p2 == '\t')
2016 p2++;
2018 if (! ISALPHA ((unsigned char) *p2))
2019 fatal_error (input_location,
2020 "specs %%rename syntax malformed after "
2021 "%ld characters",
2022 (long) (p2 - buffer));
2024 /* Get new spec name. */
2025 p3 = p2;
2026 while (*p3 && !ISSPACE ((unsigned char) *p3))
2027 p3++;
2029 if (p3 != p - 1)
2030 fatal_error (input_location,
2031 "specs %%rename syntax malformed after "
2032 "%ld characters",
2033 (long) (p3 - buffer));
2034 *p3 = '\0';
2036 for (sl = specs; sl; sl = sl->next)
2037 if (name_len == sl->name_len && !strcmp (sl->name, p1))
2038 break;
2040 if (!sl)
2041 fatal_error (input_location,
2042 "specs %s spec was not found to be renamed", p1);
2044 if (strcmp (p1, p2) == 0)
2045 continue;
2047 for (newsl = specs; newsl; newsl = newsl->next)
2048 if (strcmp (newsl->name, p2) == 0)
2049 fatal_error (input_location,
2050 "%s: attempt to rename spec %qs to "
2051 "already defined spec %qs",
2052 filename, p1, p2);
2054 if (verbose_flag)
2056 fnotice (stderr, "rename spec %s to %s\n", p1, p2);
2057 #ifdef DEBUG_SPECS
2058 fnotice (stderr, "spec is '%s'\n\n", *(sl->ptr_spec));
2059 #endif
2062 set_spec (p2, *(sl->ptr_spec), user_p);
2063 if (sl->alloc_p)
2064 free (CONST_CAST (char *, *(sl->ptr_spec)));
2066 *(sl->ptr_spec) = "";
2067 sl->alloc_p = 0;
2068 continue;
2070 else
2071 fatal_error (input_location,
2072 "specs unknown %% command after %ld characters",
2073 (long) (p1 - buffer));
2076 /* Find the colon that should end the suffix. */
2077 p1 = p;
2078 while (*p1 && *p1 != ':' && *p1 != '\n')
2079 p1++;
2081 /* The colon shouldn't be missing. */
2082 if (*p1 != ':')
2083 fatal_error (input_location,
2084 "specs file malformed after %ld characters",
2085 (long) (p1 - buffer));
2087 /* Skip back over trailing whitespace. */
2088 p2 = p1;
2089 while (p2 > buffer && (p2[-1] == ' ' || p2[-1] == '\t'))
2090 p2--;
2092 /* Copy the suffix to a string. */
2093 suffix = save_string (p, p2 - p);
2094 /* Find the next line. */
2095 p = skip_whitespace (p1 + 1);
2096 if (p[1] == 0)
2097 fatal_error (input_location,
2098 "specs file malformed after %ld characters",
2099 (long) (p - buffer));
2101 p1 = p;
2102 /* Find next blank line or end of string. */
2103 while (*p1 && !(*p1 == '\n' && (p1[1] == '\n' || p1[1] == '\0')))
2104 p1++;
2106 /* Specs end at the blank line and do not include the newline. */
2107 spec = save_string (p, p1 - p);
2108 p = p1;
2110 /* Delete backslash-newline sequences from the spec. */
2111 in = spec;
2112 out = spec;
2113 while (*in != 0)
2115 if (in[0] == '\\' && in[1] == '\n')
2116 in += 2;
2117 else if (in[0] == '#')
2118 while (*in && *in != '\n')
2119 in++;
2121 else
2122 *out++ = *in++;
2124 *out = 0;
2126 if (suffix[0] == '*')
2128 if (! strcmp (suffix, "*link_command"))
2129 link_command_spec = spec;
2130 else
2131 set_spec (suffix + 1, spec, user_p);
2133 else
2135 /* Add this pair to the vector. */
2136 compilers
2137 = XRESIZEVEC (struct compiler, compilers, n_compilers + 2);
2139 compilers[n_compilers].suffix = suffix;
2140 compilers[n_compilers].spec = spec;
2141 n_compilers++;
2142 memset (&compilers[n_compilers], 0, sizeof compilers[n_compilers]);
2145 if (*suffix == 0)
2146 link_command_spec = spec;
2149 if (link_command_spec == 0)
2150 fatal_error (input_location, "spec file has no spec for linking");
2153 /* Record the names of temporary files we tell compilers to write,
2154 and delete them at the end of the run. */
2156 /* This is the common prefix we use to make temp file names.
2157 It is chosen once for each run of this program.
2158 It is substituted into a spec by %g or %j.
2159 Thus, all temp file names contain this prefix.
2160 In practice, all temp file names start with this prefix.
2162 This prefix comes from the envvar TMPDIR if it is defined;
2163 otherwise, from the P_tmpdir macro if that is defined;
2164 otherwise, in /usr/tmp or /tmp;
2165 or finally the current directory if all else fails. */
2167 static const char *temp_filename;
2169 /* Length of the prefix. */
2171 static int temp_filename_length;
2173 /* Define the list of temporary files to delete. */
2175 struct temp_file
2177 const char *name;
2178 struct temp_file *next;
2181 /* Queue of files to delete on success or failure of compilation. */
2182 static struct temp_file *always_delete_queue;
2183 /* Queue of files to delete on failure of compilation. */
2184 static struct temp_file *failure_delete_queue;
2186 /* Record FILENAME as a file to be deleted automatically.
2187 ALWAYS_DELETE nonzero means delete it if all compilation succeeds;
2188 otherwise delete it in any case.
2189 FAIL_DELETE nonzero means delete it if a compilation step fails;
2190 otherwise delete it in any case. */
2192 void
2193 record_temp_file (const char *filename, int always_delete, int fail_delete)
2195 char *const name = xstrdup (filename);
2197 if (always_delete)
2199 struct temp_file *temp;
2200 for (temp = always_delete_queue; temp; temp = temp->next)
2201 if (! filename_cmp (name, temp->name))
2202 goto already1;
2204 temp = XNEW (struct temp_file);
2205 temp->next = always_delete_queue;
2206 temp->name = name;
2207 always_delete_queue = temp;
2209 already1:;
2212 if (fail_delete)
2214 struct temp_file *temp;
2215 for (temp = failure_delete_queue; temp; temp = temp->next)
2216 if (! filename_cmp (name, temp->name))
2218 free (name);
2219 goto already2;
2222 temp = XNEW (struct temp_file);
2223 temp->next = failure_delete_queue;
2224 temp->name = name;
2225 failure_delete_queue = temp;
2227 already2:;
2231 /* Delete all the temporary files whose names we previously recorded. */
2233 #ifndef DELETE_IF_ORDINARY
2234 #define DELETE_IF_ORDINARY(NAME,ST,VERBOSE_FLAG) \
2235 do \
2237 if (stat (NAME, &ST) >= 0 && S_ISREG (ST.st_mode)) \
2238 if (unlink (NAME) < 0) \
2239 if (VERBOSE_FLAG) \
2240 perror_with_name (NAME); \
2241 } while (0)
2242 #endif
2244 static void
2245 delete_if_ordinary (const char *name)
2247 struct stat st;
2248 #ifdef DEBUG
2249 int i, c;
2251 printf ("Delete %s? (y or n) ", name);
2252 fflush (stdout);
2253 i = getchar ();
2254 if (i != '\n')
2255 while ((c = getchar ()) != '\n' && c != EOF)
2258 if (i == 'y' || i == 'Y')
2259 #endif /* DEBUG */
2260 DELETE_IF_ORDINARY (name, st, verbose_flag);
2263 static void
2264 delete_temp_files (void)
2266 struct temp_file *temp;
2268 for (temp = always_delete_queue; temp; temp = temp->next)
2269 delete_if_ordinary (temp->name);
2270 always_delete_queue = 0;
2273 /* Delete all the files to be deleted on error. */
2275 static void
2276 delete_failure_queue (void)
2278 struct temp_file *temp;
2280 for (temp = failure_delete_queue; temp; temp = temp->next)
2281 delete_if_ordinary (temp->name);
2284 static void
2285 clear_failure_queue (void)
2287 failure_delete_queue = 0;
2290 /* Call CALLBACK for each path in PATHS, breaking out early if CALLBACK
2291 returns non-NULL.
2292 If DO_MULTI is true iterate over the paths twice, first with multilib
2293 suffix then without, otherwise iterate over the paths once without
2294 adding a multilib suffix. When DO_MULTI is true, some attempt is made
2295 to avoid visiting the same path twice, but we could do better. For
2296 instance, /usr/lib/../lib is considered different from /usr/lib.
2297 At least EXTRA_SPACE chars past the end of the path passed to
2298 CALLBACK are available for use by the callback.
2299 CALLBACK_INFO allows extra parameters to be passed to CALLBACK.
2301 Returns the value returned by CALLBACK. */
2303 static void *
2304 for_each_path (const struct path_prefix *paths,
2305 bool do_multi,
2306 size_t extra_space,
2307 void *(*callback) (char *, void *),
2308 void *callback_info)
2310 struct prefix_list *pl;
2311 const char *multi_dir = NULL;
2312 const char *multi_os_dir = NULL;
2313 const char *multiarch_suffix = NULL;
2314 const char *multi_suffix;
2315 const char *just_multi_suffix;
2316 char *path = NULL;
2317 void *ret = NULL;
2318 bool skip_multi_dir = false;
2319 bool skip_multi_os_dir = false;
2321 multi_suffix = machine_suffix;
2322 just_multi_suffix = just_machine_suffix;
2323 if (do_multi && multilib_dir && strcmp (multilib_dir, ".") != 0)
2325 multi_dir = concat (multilib_dir, dir_separator_str, NULL);
2326 multi_suffix = concat (multi_suffix, multi_dir, NULL);
2327 just_multi_suffix = concat (just_multi_suffix, multi_dir, NULL);
2329 if (do_multi && multilib_os_dir && strcmp (multilib_os_dir, ".") != 0)
2330 multi_os_dir = concat (multilib_os_dir, dir_separator_str, NULL);
2331 if (multiarch_dir)
2332 multiarch_suffix = concat (multiarch_dir, dir_separator_str, NULL);
2334 while (1)
2336 size_t multi_dir_len = 0;
2337 size_t multi_os_dir_len = 0;
2338 size_t multiarch_len = 0;
2339 size_t suffix_len;
2340 size_t just_suffix_len;
2341 size_t len;
2343 if (multi_dir)
2344 multi_dir_len = strlen (multi_dir);
2345 if (multi_os_dir)
2346 multi_os_dir_len = strlen (multi_os_dir);
2347 if (multiarch_suffix)
2348 multiarch_len = strlen (multiarch_suffix);
2349 suffix_len = strlen (multi_suffix);
2350 just_suffix_len = strlen (just_multi_suffix);
2352 if (path == NULL)
2354 len = paths->max_len + extra_space + 1;
2355 len += MAX (MAX (suffix_len, multi_os_dir_len), multiarch_len);
2356 path = XNEWVEC (char, len);
2359 for (pl = paths->plist; pl != 0; pl = pl->next)
2361 len = strlen (pl->prefix);
2362 memcpy (path, pl->prefix, len);
2364 /* Look first in MACHINE/VERSION subdirectory. */
2365 if (!skip_multi_dir)
2367 memcpy (path + len, multi_suffix, suffix_len + 1);
2368 ret = callback (path, callback_info);
2369 if (ret)
2370 break;
2373 /* Some paths are tried with just the machine (ie. target)
2374 subdir. This is used for finding as, ld, etc. */
2375 if (!skip_multi_dir
2376 && pl->require_machine_suffix == 2)
2378 memcpy (path + len, just_multi_suffix, just_suffix_len + 1);
2379 ret = callback (path, callback_info);
2380 if (ret)
2381 break;
2384 /* Now try the multiarch path. */
2385 if (!skip_multi_dir
2386 && !pl->require_machine_suffix && multiarch_dir)
2388 memcpy (path + len, multiarch_suffix, multiarch_len + 1);
2389 ret = callback (path, callback_info);
2390 if (ret)
2391 break;
2394 /* Now try the base path. */
2395 if (!pl->require_machine_suffix
2396 && !(pl->os_multilib ? skip_multi_os_dir : skip_multi_dir))
2398 const char *this_multi;
2399 size_t this_multi_len;
2401 if (pl->os_multilib)
2403 this_multi = multi_os_dir;
2404 this_multi_len = multi_os_dir_len;
2406 else
2408 this_multi = multi_dir;
2409 this_multi_len = multi_dir_len;
2412 if (this_multi_len)
2413 memcpy (path + len, this_multi, this_multi_len + 1);
2414 else
2415 path[len] = '\0';
2417 ret = callback (path, callback_info);
2418 if (ret)
2419 break;
2422 if (pl)
2423 break;
2425 if (multi_dir == NULL && multi_os_dir == NULL)
2426 break;
2428 /* Run through the paths again, this time without multilibs.
2429 Don't repeat any we have already seen. */
2430 if (multi_dir)
2432 free (CONST_CAST (char *, multi_dir));
2433 multi_dir = NULL;
2434 free (CONST_CAST (char *, multi_suffix));
2435 multi_suffix = machine_suffix;
2436 free (CONST_CAST (char *, just_multi_suffix));
2437 just_multi_suffix = just_machine_suffix;
2439 else
2440 skip_multi_dir = true;
2441 if (multi_os_dir)
2443 free (CONST_CAST (char *, multi_os_dir));
2444 multi_os_dir = NULL;
2446 else
2447 skip_multi_os_dir = true;
2450 if (multi_dir)
2452 free (CONST_CAST (char *, multi_dir));
2453 free (CONST_CAST (char *, multi_suffix));
2454 free (CONST_CAST (char *, just_multi_suffix));
2456 if (multi_os_dir)
2457 free (CONST_CAST (char *, multi_os_dir));
2458 if (ret != path)
2459 free (path);
2460 return ret;
2463 /* Callback for build_search_list. Adds path to obstack being built. */
2465 struct add_to_obstack_info {
2466 struct obstack *ob;
2467 bool check_dir;
2468 bool first_time;
2471 static void *
2472 add_to_obstack (char *path, void *data)
2474 struct add_to_obstack_info *info = (struct add_to_obstack_info *) data;
2476 if (info->check_dir && !is_directory (path, false))
2477 return NULL;
2479 if (!info->first_time)
2480 obstack_1grow (info->ob, PATH_SEPARATOR);
2482 obstack_grow (info->ob, path, strlen (path));
2484 info->first_time = false;
2485 return NULL;
2488 /* Add or change the value of an environment variable, outputting the
2489 change to standard error if in verbose mode. */
2490 static void
2491 xputenv (const char *string)
2493 if (verbose_flag)
2494 fnotice (stderr, "%s\n", string);
2495 putenv (CONST_CAST (char *, string));
2498 /* Build a list of search directories from PATHS.
2499 PREFIX is a string to prepend to the list.
2500 If CHECK_DIR_P is true we ensure the directory exists.
2501 If DO_MULTI is true, multilib paths are output first, then
2502 non-multilib paths.
2503 This is used mostly by putenv_from_prefixes so we use `collect_obstack'.
2504 It is also used by the --print-search-dirs flag. */
2506 static char *
2507 build_search_list (const struct path_prefix *paths, const char *prefix,
2508 bool check_dir, bool do_multi)
2510 struct add_to_obstack_info info;
2512 info.ob = &collect_obstack;
2513 info.check_dir = check_dir;
2514 info.first_time = true;
2516 obstack_grow (&collect_obstack, prefix, strlen (prefix));
2517 obstack_1grow (&collect_obstack, '=');
2519 for_each_path (paths, do_multi, 0, add_to_obstack, &info);
2521 obstack_1grow (&collect_obstack, '\0');
2522 return XOBFINISH (&collect_obstack, char *);
2525 /* Rebuild the COMPILER_PATH and LIBRARY_PATH environment variables
2526 for collect. */
2528 static void
2529 putenv_from_prefixes (const struct path_prefix *paths, const char *env_var,
2530 bool do_multi)
2532 xputenv (build_search_list (paths, env_var, true, do_multi));
2535 /* Check whether NAME can be accessed in MODE. This is like access,
2536 except that it never considers directories to be executable. */
2538 static int
2539 access_check (const char *name, int mode)
2541 if (mode == X_OK)
2543 struct stat st;
2545 if (stat (name, &st) < 0
2546 || S_ISDIR (st.st_mode))
2547 return -1;
2550 return access (name, mode);
2553 /* Callback for find_a_file. Appends the file name to the directory
2554 path. If the resulting file exists in the right mode, return the
2555 full pathname to the file. */
2557 struct file_at_path_info {
2558 const char *name;
2559 const char *suffix;
2560 int name_len;
2561 int suffix_len;
2562 int mode;
2565 static void *
2566 file_at_path (char *path, void *data)
2568 struct file_at_path_info *info = (struct file_at_path_info *) data;
2569 size_t len = strlen (path);
2571 memcpy (path + len, info->name, info->name_len);
2572 len += info->name_len;
2574 /* Some systems have a suffix for executable files.
2575 So try appending that first. */
2576 if (info->suffix_len)
2578 memcpy (path + len, info->suffix, info->suffix_len + 1);
2579 if (access_check (path, info->mode) == 0)
2580 return path;
2583 path[len] = '\0';
2584 if (access_check (path, info->mode) == 0)
2585 return path;
2587 return NULL;
2590 /* Search for NAME using the prefix list PREFIXES. MODE is passed to
2591 access to check permissions. If DO_MULTI is true, search multilib
2592 paths then non-multilib paths, otherwise do not search multilib paths.
2593 Return 0 if not found, otherwise return its name, allocated with malloc. */
2595 static char *
2596 find_a_file (const struct path_prefix *pprefix, const char *name, int mode,
2597 bool do_multi)
2599 struct file_at_path_info info;
2601 #ifdef DEFAULT_ASSEMBLER
2602 if (! strcmp (name, "as") && access (DEFAULT_ASSEMBLER, mode) == 0)
2603 return xstrdup (DEFAULT_ASSEMBLER);
2604 #endif
2606 #ifdef DEFAULT_LINKER
2607 if (! strcmp (name, "ld") && access (DEFAULT_LINKER, mode) == 0)
2608 return xstrdup (DEFAULT_LINKER);
2609 #endif
2611 /* Determine the filename to execute (special case for absolute paths). */
2613 if (IS_ABSOLUTE_PATH (name))
2615 if (access (name, mode) == 0)
2616 return xstrdup (name);
2618 return NULL;
2621 info.name = name;
2622 info.suffix = (mode & X_OK) != 0 ? HOST_EXECUTABLE_SUFFIX : "";
2623 info.name_len = strlen (info.name);
2624 info.suffix_len = strlen (info.suffix);
2625 info.mode = mode;
2627 return (char*) for_each_path (pprefix, do_multi,
2628 info.name_len + info.suffix_len,
2629 file_at_path, &info);
2632 /* Ranking of prefixes in the sort list. -B prefixes are put before
2633 all others. */
2635 enum path_prefix_priority
2637 PREFIX_PRIORITY_B_OPT,
2638 PREFIX_PRIORITY_LAST
2641 /* Add an entry for PREFIX in PLIST. The PLIST is kept in ascending
2642 order according to PRIORITY. Within each PRIORITY, new entries are
2643 appended.
2645 If WARN is nonzero, we will warn if no file is found
2646 through this prefix. WARN should point to an int
2647 which will be set to 1 if this entry is used.
2649 COMPONENT is the value to be passed to update_path.
2651 REQUIRE_MACHINE_SUFFIX is 1 if this prefix can't be used without
2652 the complete value of machine_suffix.
2653 2 means try both machine_suffix and just_machine_suffix. */
2655 static void
2656 add_prefix (struct path_prefix *pprefix, const char *prefix,
2657 const char *component, /* enum prefix_priority */ int priority,
2658 int require_machine_suffix, int os_multilib)
2660 struct prefix_list *pl, **prev;
2661 int len;
2663 for (prev = &pprefix->plist;
2664 (*prev) != NULL && (*prev)->priority <= priority;
2665 prev = &(*prev)->next)
2668 /* Keep track of the longest prefix. */
2670 prefix = update_path (prefix, component);
2671 len = strlen (prefix);
2672 if (len > pprefix->max_len)
2673 pprefix->max_len = len;
2675 pl = XNEW (struct prefix_list);
2676 pl->prefix = prefix;
2677 pl->require_machine_suffix = require_machine_suffix;
2678 pl->priority = priority;
2679 pl->os_multilib = os_multilib;
2681 /* Insert after PREV. */
2682 pl->next = (*prev);
2683 (*prev) = pl;
2686 /* Same as add_prefix, but prepending target_system_root to prefix. */
2687 /* The target_system_root prefix has been relocated by gcc_exec_prefix. */
2688 static void
2689 add_sysrooted_prefix (struct path_prefix *pprefix, const char *prefix,
2690 const char *component,
2691 /* enum prefix_priority */ int priority,
2692 int require_machine_suffix, int os_multilib)
2694 if (!IS_ABSOLUTE_PATH (prefix))
2695 fatal_error (input_location, "system path %qs is not absolute", prefix);
2697 if (target_system_root)
2699 char *sysroot_no_trailing_dir_separator = xstrdup (target_system_root);
2700 size_t sysroot_len = strlen (target_system_root);
2702 if (sysroot_len > 0
2703 && target_system_root[sysroot_len - 1] == DIR_SEPARATOR)
2704 sysroot_no_trailing_dir_separator[sysroot_len - 1] = '\0';
2706 if (target_sysroot_suffix)
2707 prefix = concat (sysroot_no_trailing_dir_separator,
2708 target_sysroot_suffix, prefix, NULL);
2709 else
2710 prefix = concat (sysroot_no_trailing_dir_separator, prefix, NULL);
2712 free (sysroot_no_trailing_dir_separator);
2714 /* We have to override this because GCC's notion of sysroot
2715 moves along with GCC. */
2716 component = "GCC";
2719 add_prefix (pprefix, prefix, component, priority,
2720 require_machine_suffix, os_multilib);
2723 /* Execute the command specified by the arguments on the current line of spec.
2724 When using pipes, this includes several piped-together commands
2725 with `|' between them.
2727 Return 0 if successful, -1 if failed. */
2729 static int
2730 execute (void)
2732 int i;
2733 int n_commands; /* # of command. */
2734 char *string;
2735 struct pex_obj *pex;
2736 struct command
2738 const char *prog; /* program name. */
2739 const char **argv; /* vector of args. */
2741 const char *arg;
2743 struct command *commands; /* each command buffer with above info. */
2745 gcc_assert (!processing_spec_function);
2747 if (wrapper_string)
2749 string = find_a_file (&exec_prefixes,
2750 argbuf[0], X_OK, false);
2751 if (string)
2752 argbuf[0] = string;
2753 insert_wrapper (wrapper_string);
2756 /* Count # of piped commands. */
2757 for (n_commands = 1, i = 0; argbuf.iterate (i, &arg); i++)
2758 if (strcmp (arg, "|") == 0)
2759 n_commands++;
2761 /* Get storage for each command. */
2762 commands = (struct command *) alloca (n_commands * sizeof (struct command));
2764 /* Split argbuf into its separate piped processes,
2765 and record info about each one.
2766 Also search for the programs that are to be run. */
2768 argbuf.safe_push (0);
2770 commands[0].prog = argbuf[0]; /* first command. */
2771 commands[0].argv = argbuf.address ();
2773 if (!wrapper_string)
2775 string = find_a_file (&exec_prefixes, commands[0].prog, X_OK, false);
2776 commands[0].argv[0] = (string) ? string : commands[0].argv[0];
2779 for (n_commands = 1, i = 0; argbuf.iterate (i, &arg); i++)
2780 if (arg && strcmp (arg, "|") == 0)
2781 { /* each command. */
2782 #if defined (__MSDOS__) || defined (OS2) || defined (VMS)
2783 fatal_error (input_location, "-pipe not supported");
2784 #endif
2785 argbuf[i] = 0; /* Termination of
2786 command args. */
2787 commands[n_commands].prog = argbuf[i + 1];
2788 commands[n_commands].argv
2789 = &(argbuf.address ())[i + 1];
2790 string = find_a_file (&exec_prefixes, commands[n_commands].prog,
2791 X_OK, false);
2792 if (string)
2793 commands[n_commands].argv[0] = string;
2794 n_commands++;
2797 /* If -v, print what we are about to do, and maybe query. */
2799 if (verbose_flag)
2801 /* For help listings, put a blank line between sub-processes. */
2802 if (print_help_list)
2803 fputc ('\n', stderr);
2805 /* Print each piped command as a separate line. */
2806 for (i = 0; i < n_commands; i++)
2808 const char *const *j;
2810 if (verbose_only_flag)
2812 for (j = commands[i].argv; *j; j++)
2814 const char *p;
2815 for (p = *j; *p; ++p)
2816 if (!ISALNUM ((unsigned char) *p)
2817 && *p != '_' && *p != '/' && *p != '-' && *p != '.')
2818 break;
2819 if (*p || !*j)
2821 fprintf (stderr, " \"");
2822 for (p = *j; *p; ++p)
2824 if (*p == '"' || *p == '\\' || *p == '$')
2825 fputc ('\\', stderr);
2826 fputc (*p, stderr);
2828 fputc ('"', stderr);
2830 /* If it's empty, print "". */
2831 else if (!**j)
2832 fprintf (stderr, " \"\"");
2833 else
2834 fprintf (stderr, " %s", *j);
2837 else
2838 for (j = commands[i].argv; *j; j++)
2839 /* If it's empty, print "". */
2840 if (!**j)
2841 fprintf (stderr, " \"\"");
2842 else
2843 fprintf (stderr, " %s", *j);
2845 /* Print a pipe symbol after all but the last command. */
2846 if (i + 1 != n_commands)
2847 fprintf (stderr, " |");
2848 fprintf (stderr, "\n");
2850 fflush (stderr);
2851 if (verbose_only_flag != 0)
2853 /* verbose_only_flag should act as if the spec was
2854 executed, so increment execution_count before
2855 returning. This prevents spurious warnings about
2856 unused linker input files, etc. */
2857 execution_count++;
2858 return 0;
2860 #ifdef DEBUG
2861 fnotice (stderr, "\nGo ahead? (y or n) ");
2862 fflush (stderr);
2863 i = getchar ();
2864 if (i != '\n')
2865 while (getchar () != '\n')
2868 if (i != 'y' && i != 'Y')
2869 return 0;
2870 #endif /* DEBUG */
2873 #ifdef ENABLE_VALGRIND_CHECKING
2874 /* Run the each command through valgrind. To simplify prepending the
2875 path to valgrind and the option "-q" (for quiet operation unless
2876 something triggers), we allocate a separate argv array. */
2878 for (i = 0; i < n_commands; i++)
2880 const char **argv;
2881 int argc;
2882 int j;
2884 for (argc = 0; commands[i].argv[argc] != NULL; argc++)
2887 argv = XALLOCAVEC (const char *, argc + 3);
2889 argv[0] = VALGRIND_PATH;
2890 argv[1] = "-q";
2891 for (j = 2; j < argc + 2; j++)
2892 argv[j] = commands[i].argv[j - 2];
2893 argv[j] = NULL;
2895 commands[i].argv = argv;
2896 commands[i].prog = argv[0];
2898 #endif
2900 /* Run each piped subprocess. */
2902 pex = pex_init (PEX_USE_PIPES | ((report_times || report_times_to_file)
2903 ? PEX_RECORD_TIMES : 0),
2904 progname, temp_filename);
2905 if (pex == NULL)
2906 fatal_error (input_location, "pex_init failed: %m");
2908 for (i = 0; i < n_commands; i++)
2910 const char *errmsg;
2911 int err;
2912 const char *string = commands[i].argv[0];
2914 errmsg = pex_run (pex,
2915 ((i + 1 == n_commands ? PEX_LAST : 0)
2916 | (string == commands[i].prog ? PEX_SEARCH : 0)),
2917 string, CONST_CAST (char **, commands[i].argv),
2918 NULL, NULL, &err);
2919 if (errmsg != NULL)
2921 if (err == 0)
2922 fatal_error (input_location, errmsg);
2923 else
2925 errno = err;
2926 pfatal_with_name (errmsg);
2930 if (i && string != commands[i].prog)
2931 free (CONST_CAST (char *, string));
2934 execution_count++;
2936 /* Wait for all the subprocesses to finish. */
2939 int *statuses;
2940 struct pex_time *times = NULL;
2941 int ret_code = 0;
2943 statuses = (int *) alloca (n_commands * sizeof (int));
2944 if (!pex_get_status (pex, n_commands, statuses))
2945 fatal_error (input_location, "failed to get exit status: %m");
2947 if (report_times || report_times_to_file)
2949 times = (struct pex_time *) alloca (n_commands * sizeof (struct pex_time));
2950 if (!pex_get_times (pex, n_commands, times))
2951 fatal_error (input_location, "failed to get process times: %m");
2954 pex_free (pex);
2956 for (i = 0; i < n_commands; ++i)
2958 int status = statuses[i];
2960 if (WIFSIGNALED (status))
2962 #ifdef SIGPIPE
2963 /* SIGPIPE is a special case. It happens in -pipe mode
2964 when the compiler dies before the preprocessor is done,
2965 or the assembler dies before the compiler is done.
2966 There's generally been an error already, and this is
2967 just fallout. So don't generate another error unless
2968 we would otherwise have succeeded. */
2969 if (WTERMSIG (status) == SIGPIPE
2970 && (signal_count || greatest_status >= MIN_FATAL_STATUS))
2972 signal_count++;
2973 ret_code = -1;
2975 else
2976 #endif
2977 internal_error_no_backtrace ("%s (program %s)",
2978 strsignal (WTERMSIG (status)),
2979 commands[i].prog);
2981 else if (WIFEXITED (status)
2982 && WEXITSTATUS (status) >= MIN_FATAL_STATUS)
2984 /* For ICEs in cc1, cc1obj, cc1plus see if it is
2985 reproducible or not. */
2986 const char *p;
2987 if (flag_report_bug
2988 && WEXITSTATUS (status) == ICE_EXIT_CODE
2989 && i == 0
2990 && (p = strrchr (commands[0].argv[0], DIR_SEPARATOR))
2991 && ! strncmp (p + 1, "cc1", 3))
2992 try_generate_repro (commands[0].argv);
2993 if (WEXITSTATUS (status) > greatest_status)
2994 greatest_status = WEXITSTATUS (status);
2995 ret_code = -1;
2998 if (report_times || report_times_to_file)
3000 struct pex_time *pt = &times[i];
3001 double ut, st;
3003 ut = ((double) pt->user_seconds
3004 + (double) pt->user_microseconds / 1.0e6);
3005 st = ((double) pt->system_seconds
3006 + (double) pt->system_microseconds / 1.0e6);
3008 if (ut + st != 0)
3010 if (report_times)
3011 fnotice (stderr, "# %s %.2f %.2f\n",
3012 commands[i].prog, ut, st);
3014 if (report_times_to_file)
3016 int c = 0;
3017 const char *const *j;
3019 fprintf (report_times_to_file, "%g %g", ut, st);
3021 for (j = &commands[i].prog; *j; j = &commands[i].argv[++c])
3023 const char *p;
3024 for (p = *j; *p; ++p)
3025 if (*p == '"' || *p == '\\' || *p == '$'
3026 || ISSPACE (*p))
3027 break;
3029 if (*p)
3031 fprintf (report_times_to_file, " \"");
3032 for (p = *j; *p; ++p)
3034 if (*p == '"' || *p == '\\' || *p == '$')
3035 fputc ('\\', report_times_to_file);
3036 fputc (*p, report_times_to_file);
3038 fputc ('"', report_times_to_file);
3040 else
3041 fprintf (report_times_to_file, " %s", *j);
3044 fputc ('\n', report_times_to_file);
3050 if (commands[0].argv[0] != commands[0].prog)
3051 free (CONST_CAST (char *, commands[0].argv[0]));
3053 return ret_code;
3057 /* Find all the switches given to us
3058 and make a vector describing them.
3059 The elements of the vector are strings, one per switch given.
3060 If a switch uses following arguments, then the `part1' field
3061 is the switch itself and the `args' field
3062 is a null-terminated vector containing the following arguments.
3063 Bits in the `live_cond' field are:
3064 SWITCH_LIVE to indicate this switch is true in a conditional spec.
3065 SWITCH_FALSE to indicate this switch is overridden by a later switch.
3066 SWITCH_IGNORE to indicate this switch should be ignored (used in %<S).
3067 SWITCH_IGNORE_PERMANENTLY to indicate this switch should be ignored
3068 in all do_spec calls afterwards. Used for %<S from self specs.
3069 The `validated' field is nonzero if any spec has looked at this switch;
3070 if it remains zero at the end of the run, it must be meaningless. */
3072 #define SWITCH_LIVE (1 << 0)
3073 #define SWITCH_FALSE (1 << 1)
3074 #define SWITCH_IGNORE (1 << 2)
3075 #define SWITCH_IGNORE_PERMANENTLY (1 << 3)
3076 #define SWITCH_KEEP_FOR_GCC (1 << 4)
3078 struct switchstr
3080 const char *part1;
3081 const char **args;
3082 unsigned int live_cond;
3083 bool known;
3084 bool validated;
3085 bool ordering;
3088 static struct switchstr *switches;
3090 static int n_switches;
3092 static int n_switches_alloc;
3094 /* Set to zero if -fcompare-debug is disabled, positive if it's
3095 enabled and we're running the first compilation, negative if it's
3096 enabled and we're running the second compilation. For most of the
3097 time, it's in the range -1..1, but it can be temporarily set to 2
3098 or 3 to indicate that the -fcompare-debug flags didn't come from
3099 the command-line, but rather from the GCC_COMPARE_DEBUG environment
3100 variable, until a synthesized -fcompare-debug flag is added to the
3101 command line. */
3102 int compare_debug;
3104 /* Set to nonzero if we've seen the -fcompare-debug-second flag. */
3105 int compare_debug_second;
3107 /* Set to the flags that should be passed to the second compilation in
3108 a -fcompare-debug compilation. */
3109 const char *compare_debug_opt;
3111 static struct switchstr *switches_debug_check[2];
3113 static int n_switches_debug_check[2];
3115 static int n_switches_alloc_debug_check[2];
3117 static char *debug_check_temp_file[2];
3119 /* Language is one of three things:
3121 1) The name of a real programming language.
3122 2) NULL, indicating that no one has figured out
3123 what it is yet.
3124 3) '*', indicating that the file should be passed
3125 to the linker. */
3126 struct infile
3128 const char *name;
3129 const char *language;
3130 struct compiler *incompiler;
3131 bool compiled;
3132 bool preprocessed;
3135 /* Also a vector of input files specified. */
3137 static struct infile *infiles;
3139 int n_infiles;
3141 static int n_infiles_alloc;
3143 /* True if multiple input files are being compiled to a single
3144 assembly file. */
3146 static bool combine_inputs;
3148 /* This counts the number of libraries added by lang_specific_driver, so that
3149 we can tell if there were any user supplied any files or libraries. */
3151 static int added_libraries;
3153 /* And a vector of corresponding output files is made up later. */
3155 const char **outfiles;
3157 #if defined(HAVE_TARGET_OBJECT_SUFFIX) || defined(HAVE_TARGET_EXECUTABLE_SUFFIX)
3159 /* Convert NAME to a new name if it is the standard suffix. DO_EXE
3160 is true if we should look for an executable suffix. DO_OBJ
3161 is true if we should look for an object suffix. */
3163 static const char *
3164 convert_filename (const char *name, int do_exe ATTRIBUTE_UNUSED,
3165 int do_obj ATTRIBUTE_UNUSED)
3167 #if defined(HAVE_TARGET_EXECUTABLE_SUFFIX)
3168 int i;
3169 #endif
3170 int len;
3172 if (name == NULL)
3173 return NULL;
3175 len = strlen (name);
3177 #ifdef HAVE_TARGET_OBJECT_SUFFIX
3178 /* Convert x.o to x.obj if TARGET_OBJECT_SUFFIX is ".obj". */
3179 if (do_obj && len > 2
3180 && name[len - 2] == '.'
3181 && name[len - 1] == 'o')
3183 obstack_grow (&obstack, name, len - 2);
3184 obstack_grow0 (&obstack, TARGET_OBJECT_SUFFIX, strlen (TARGET_OBJECT_SUFFIX));
3185 name = XOBFINISH (&obstack, const char *);
3187 #endif
3189 #if defined(HAVE_TARGET_EXECUTABLE_SUFFIX)
3190 /* If there is no filetype, make it the executable suffix (which includes
3191 the "."). But don't get confused if we have just "-o". */
3192 if (! do_exe || TARGET_EXECUTABLE_SUFFIX[0] == 0 || (len == 2 && name[0] == '-'))
3193 return name;
3195 for (i = len - 1; i >= 0; i--)
3196 if (IS_DIR_SEPARATOR (name[i]))
3197 break;
3199 for (i++; i < len; i++)
3200 if (name[i] == '.')
3201 return name;
3203 obstack_grow (&obstack, name, len);
3204 obstack_grow0 (&obstack, TARGET_EXECUTABLE_SUFFIX,
3205 strlen (TARGET_EXECUTABLE_SUFFIX));
3206 name = XOBFINISH (&obstack, const char *);
3207 #endif
3209 return name;
3211 #endif
3213 /* Display the command line switches accepted by gcc. */
3214 static void
3215 display_help (void)
3217 printf (_("Usage: %s [options] file...\n"), progname);
3218 fputs (_("Options:\n"), stdout);
3220 fputs (_(" -pass-exit-codes Exit with highest error code from a phase\n"), stdout);
3221 fputs (_(" --help Display this information\n"), stdout);
3222 fputs (_(" --target-help Display target specific command line options\n"), stdout);
3223 fputs (_(" --help={common|optimizers|params|target|warnings|[^]{joined|separate|undocumented}}[,...]\n"), stdout);
3224 fputs (_(" Display specific types of command line options\n"), stdout);
3225 if (! verbose_flag)
3226 fputs (_(" (Use '-v --help' to display command line options of sub-processes)\n"), stdout);
3227 fputs (_(" --version Display compiler version information\n"), stdout);
3228 fputs (_(" -dumpspecs Display all of the built in spec strings\n"), stdout);
3229 fputs (_(" -dumpversion Display the version of the compiler\n"), stdout);
3230 fputs (_(" -dumpmachine Display the compiler's target processor\n"), stdout);
3231 fputs (_(" -print-search-dirs Display the directories in the compiler's search path\n"), stdout);
3232 fputs (_(" -print-libgcc-file-name Display the name of the compiler's companion library\n"), stdout);
3233 fputs (_(" -print-file-name=<lib> Display the full path to library <lib>\n"), stdout);
3234 fputs (_(" -print-prog-name=<prog> Display the full path to compiler component <prog>\n"), stdout);
3235 fputs (_("\
3236 -print-multiarch Display the target's normalized GNU triplet, used as\n\
3237 a component in the library path\n"), stdout);
3238 fputs (_(" -print-multi-directory Display the root directory for versions of libgcc\n"), stdout);
3239 fputs (_("\
3240 -print-multi-lib Display the mapping between command line options and\n\
3241 multiple library search directories\n"), stdout);
3242 fputs (_(" -print-multi-os-directory Display the relative path to OS libraries\n"), stdout);
3243 fputs (_(" -print-sysroot Display the target libraries directory\n"), stdout);
3244 fputs (_(" -print-sysroot-headers-suffix Display the sysroot suffix used to find headers\n"), stdout);
3245 fputs (_(" -Wa,<options> Pass comma-separated <options> on to the assembler\n"), stdout);
3246 fputs (_(" -Wp,<options> Pass comma-separated <options> on to the preprocessor\n"), stdout);
3247 fputs (_(" -Wl,<options> Pass comma-separated <options> on to the linker\n"), stdout);
3248 fputs (_(" -Xassembler <arg> Pass <arg> on to the assembler\n"), stdout);
3249 fputs (_(" -Xpreprocessor <arg> Pass <arg> on to the preprocessor\n"), stdout);
3250 fputs (_(" -Xlinker <arg> Pass <arg> on to the linker\n"), stdout);
3251 fputs (_(" -save-temps Do not delete intermediate files\n"), stdout);
3252 fputs (_(" -save-temps=<arg> Do not delete intermediate files\n"), stdout);
3253 fputs (_("\
3254 -no-canonical-prefixes Do not canonicalize paths when building relative\n\
3255 prefixes to other gcc components\n"), stdout);
3256 fputs (_(" -pipe Use pipes rather than intermediate files\n"), stdout);
3257 fputs (_(" -time Time the execution of each subprocess\n"), stdout);
3258 fputs (_(" -specs=<file> Override built-in specs with the contents of <file>\n"), stdout);
3259 fputs (_(" -std=<standard> Assume that the input sources are for <standard>\n"), stdout);
3260 fputs (_("\
3261 --sysroot=<directory> Use <directory> as the root directory for headers\n\
3262 and libraries\n"), stdout);
3263 fputs (_(" -B <directory> Add <directory> to the compiler's search paths\n"), stdout);
3264 fputs (_(" -v Display the programs invoked by the compiler\n"), stdout);
3265 fputs (_(" -### Like -v but options quoted and commands not executed\n"), stdout);
3266 fputs (_(" -E Preprocess only; do not compile, assemble or link\n"), stdout);
3267 fputs (_(" -S Compile only; do not assemble or link\n"), stdout);
3268 fputs (_(" -c Compile and assemble, but do not link\n"), stdout);
3269 fputs (_(" -o <file> Place the output into <file>\n"), stdout);
3270 fputs (_(" -pie Create a position independent executable\n"), stdout);
3271 fputs (_(" -shared Create a shared library\n"), stdout);
3272 fputs (_("\
3273 -x <language> Specify the language of the following input files\n\
3274 Permissible languages include: c c++ assembler none\n\
3275 'none' means revert to the default behavior of\n\
3276 guessing the language based on the file's extension\n\
3277 "), stdout);
3279 printf (_("\
3280 \nOptions starting with -g, -f, -m, -O, -W, or --param are automatically\n\
3281 passed on to the various sub-processes invoked by %s. In order to pass\n\
3282 other options on to these processes the -W<letter> options must be used.\n\
3283 "), progname);
3285 /* The rest of the options are displayed by invocations of the various
3286 sub-processes. */
3289 static void
3290 add_preprocessor_option (const char *option, int len)
3292 preprocessor_options.safe_push (save_string (option, len));
3295 static void
3296 add_assembler_option (const char *option, int len)
3298 assembler_options.safe_push (save_string (option, len));
3301 static void
3302 add_linker_option (const char *option, int len)
3304 linker_options.safe_push (save_string (option, len));
3307 /* Allocate space for an input file in infiles. */
3309 static void
3310 alloc_infile (void)
3312 if (n_infiles_alloc == 0)
3314 n_infiles_alloc = 16;
3315 infiles = XNEWVEC (struct infile, n_infiles_alloc);
3317 else if (n_infiles_alloc == n_infiles)
3319 n_infiles_alloc *= 2;
3320 infiles = XRESIZEVEC (struct infile, infiles, n_infiles_alloc);
3324 /* Store an input file with the given NAME and LANGUAGE in
3325 infiles. */
3327 static void
3328 add_infile (const char *name, const char *language)
3330 alloc_infile ();
3331 infiles[n_infiles].name = name;
3332 infiles[n_infiles++].language = language;
3335 /* Allocate space for a switch in switches. */
3337 static void
3338 alloc_switch (void)
3340 if (n_switches_alloc == 0)
3342 n_switches_alloc = 16;
3343 switches = XNEWVEC (struct switchstr, n_switches_alloc);
3345 else if (n_switches_alloc == n_switches)
3347 n_switches_alloc *= 2;
3348 switches = XRESIZEVEC (struct switchstr, switches, n_switches_alloc);
3352 /* Save an option OPT with N_ARGS arguments in array ARGS, marking it
3353 as validated if VALIDATED and KNOWN if it is an internal switch. */
3355 static void
3356 save_switch (const char *opt, size_t n_args, const char *const *args,
3357 bool validated, bool known)
3359 alloc_switch ();
3360 switches[n_switches].part1 = opt + 1;
3361 if (n_args == 0)
3362 switches[n_switches].args = 0;
3363 else
3365 switches[n_switches].args = XNEWVEC (const char *, n_args + 1);
3366 memcpy (switches[n_switches].args, args, n_args * sizeof (const char *));
3367 switches[n_switches].args[n_args] = NULL;
3370 switches[n_switches].live_cond = 0;
3371 switches[n_switches].validated = validated;
3372 switches[n_switches].known = known;
3373 switches[n_switches].ordering = 0;
3374 n_switches++;
3377 /* Handle an option DECODED that is unknown to the option-processing
3378 machinery. */
3380 static bool
3381 driver_unknown_option_callback (const struct cl_decoded_option *decoded)
3383 const char *opt = decoded->arg;
3384 if (opt[1] == 'W' && opt[2] == 'n' && opt[3] == 'o' && opt[4] == '-'
3385 && !(decoded->errors & CL_ERR_NEGATIVE))
3387 /* Leave unknown -Wno-* options for the compiler proper, to be
3388 diagnosed only if there are warnings. */
3389 save_switch (decoded->canonical_option[0],
3390 decoded->canonical_option_num_elements - 1,
3391 &decoded->canonical_option[1], false, true);
3392 return false;
3394 if (decoded->opt_index == OPT_SPECIAL_unknown)
3396 /* Give it a chance to define it a a spec file. */
3397 save_switch (decoded->canonical_option[0],
3398 decoded->canonical_option_num_elements - 1,
3399 &decoded->canonical_option[1], false, false);
3400 return false;
3402 else
3403 return true;
3406 /* Handle an option DECODED that is not marked as CL_DRIVER.
3407 LANG_MASK will always be CL_DRIVER. */
3409 static void
3410 driver_wrong_lang_callback (const struct cl_decoded_option *decoded,
3411 unsigned int lang_mask ATTRIBUTE_UNUSED)
3413 /* At this point, non-driver options are accepted (and expected to
3414 be passed down by specs) unless marked to be rejected by the
3415 driver. Options to be rejected by the driver but accepted by the
3416 compilers proper are treated just like completely unknown
3417 options. */
3418 const struct cl_option *option = &cl_options[decoded->opt_index];
3420 if (option->cl_reject_driver)
3421 error ("unrecognized command line option %qs",
3422 decoded->orig_option_with_args_text);
3423 else
3424 save_switch (decoded->canonical_option[0],
3425 decoded->canonical_option_num_elements - 1,
3426 &decoded->canonical_option[1], false, true);
3429 static const char *spec_lang = 0;
3430 static int last_language_n_infiles;
3432 /* Parse -foffload option argument. */
3434 static void
3435 handle_foffload_option (const char *arg)
3437 const char *c, *cur, *n, *next, *end;
3438 char *target;
3440 /* If option argument starts with '-' then no target is specified and we
3441 do not need to parse it. */
3442 if (arg[0] == '-')
3443 return;
3445 end = strchr (arg, '=');
3446 if (end == NULL)
3447 end = strchr (arg, '\0');
3448 cur = arg;
3450 while (cur < end)
3452 next = strchr (cur, ',');
3453 if (next == NULL)
3454 next = end;
3455 next = (next > end) ? end : next;
3457 target = XNEWVEC (char, next - cur + 1);
3458 memcpy (target, cur, next - cur);
3459 target[next - cur] = '\0';
3461 /* If 'disable' is passed to the option, stop parsing the option and clean
3462 the list of offload targets. */
3463 if (strcmp (target, "disable") == 0)
3465 free (offload_targets);
3466 offload_targets = xstrdup ("");
3467 break;
3470 /* Check that GCC is configured to support the offload target. */
3471 c = OFFLOAD_TARGETS;
3472 while (c)
3474 n = strchr (c, ',');
3475 if (n == NULL)
3476 n = strchr (c, '\0');
3478 if (next - cur == n - c && strncmp (target, c, n - c) == 0)
3479 break;
3481 c = *n ? n + 1 : NULL;
3484 if (!c)
3485 fatal_error (input_location,
3486 "GCC is not configured to support %s as offload target",
3487 target);
3489 if (!offload_targets)
3491 offload_targets = target;
3492 target = NULL;
3494 else
3496 /* Check that the target hasn't already presented in the list. */
3497 c = offload_targets;
3500 n = strchr (c, ':');
3501 if (n == NULL)
3502 n = strchr (c, '\0');
3504 if (next - cur == n - c && strncmp (c, target, n - c) == 0)
3505 break;
3507 c = n + 1;
3509 while (*n);
3511 /* If duplicate is not found, append the target to the list. */
3512 if (c > n)
3514 size_t offload_targets_len = strlen (offload_targets);
3515 offload_targets
3516 = XRESIZEVEC (char, offload_targets,
3517 offload_targets_len + next - cur + 2);
3518 if (offload_targets_len)
3519 offload_targets[offload_targets_len++] = ':';
3520 memcpy (offload_targets + offload_targets_len, target, next - cur);
3524 cur = next + 1;
3525 XDELETEVEC (target);
3529 /* Handle a driver option; arguments and return value as for
3530 handle_option. */
3532 static bool
3533 driver_handle_option (struct gcc_options *opts,
3534 struct gcc_options *opts_set,
3535 const struct cl_decoded_option *decoded,
3536 unsigned int lang_mask ATTRIBUTE_UNUSED, int kind,
3537 location_t loc,
3538 const struct cl_option_handlers *handlers ATTRIBUTE_UNUSED,
3539 diagnostic_context *dc)
3541 size_t opt_index = decoded->opt_index;
3542 const char *arg = decoded->arg;
3543 const char *compare_debug_replacement_opt;
3544 int value = decoded->value;
3545 bool validated = false;
3546 bool do_save = true;
3548 gcc_assert (opts == &global_options);
3549 gcc_assert (opts_set == &global_options_set);
3550 gcc_assert (kind == DK_UNSPECIFIED);
3551 gcc_assert (loc == UNKNOWN_LOCATION);
3552 gcc_assert (dc == global_dc);
3554 switch (opt_index)
3556 case OPT_dumpspecs:
3558 struct spec_list *sl;
3559 init_spec ();
3560 for (sl = specs; sl; sl = sl->next)
3561 printf ("*%s:\n%s\n\n", sl->name, *(sl->ptr_spec));
3562 if (link_command_spec)
3563 printf ("*link_command:\n%s\n\n", link_command_spec);
3564 exit (0);
3567 case OPT_dumpversion:
3568 printf ("%s\n", spec_version);
3569 exit (0);
3571 case OPT_dumpmachine:
3572 printf ("%s\n", spec_machine);
3573 exit (0);
3575 case OPT__version:
3576 print_version = 1;
3578 /* CPP driver cannot obtain switch from cc1_options. */
3579 if (is_cpp_driver)
3580 add_preprocessor_option ("--version", strlen ("--version"));
3581 add_assembler_option ("--version", strlen ("--version"));
3582 add_linker_option ("--version", strlen ("--version"));
3583 break;
3585 case OPT__help:
3586 print_help_list = 1;
3588 /* CPP driver cannot obtain switch from cc1_options. */
3589 if (is_cpp_driver)
3590 add_preprocessor_option ("--help", 6);
3591 add_assembler_option ("--help", 6);
3592 add_linker_option ("--help", 6);
3593 break;
3595 case OPT__help_:
3596 print_subprocess_help = 2;
3597 break;
3599 case OPT__target_help:
3600 print_subprocess_help = 1;
3602 /* CPP driver cannot obtain switch from cc1_options. */
3603 if (is_cpp_driver)
3604 add_preprocessor_option ("--target-help", 13);
3605 add_assembler_option ("--target-help", 13);
3606 add_linker_option ("--target-help", 13);
3607 break;
3609 case OPT__no_sysroot_suffix:
3610 case OPT_pass_exit_codes:
3611 case OPT_print_search_dirs:
3612 case OPT_print_file_name_:
3613 case OPT_print_prog_name_:
3614 case OPT_print_multi_lib:
3615 case OPT_print_multi_directory:
3616 case OPT_print_sysroot:
3617 case OPT_print_multi_os_directory:
3618 case OPT_print_multiarch:
3619 case OPT_print_sysroot_headers_suffix:
3620 case OPT_time:
3621 case OPT_wrapper:
3622 /* These options set the variables specified in common.opt
3623 automatically, and do not need to be saved for spec
3624 processing. */
3625 do_save = false;
3626 break;
3628 case OPT_print_libgcc_file_name:
3629 print_file_name = "libgcc.a";
3630 do_save = false;
3631 break;
3633 case OPT_fuse_ld_bfd:
3634 use_ld = ".bfd";
3635 break;
3637 case OPT_fuse_ld_gold:
3638 use_ld = ".gold";
3639 break;
3641 case OPT_fcompare_debug_second:
3642 compare_debug_second = 1;
3643 break;
3645 case OPT_fcompare_debug:
3646 switch (value)
3648 case 0:
3649 compare_debug_replacement_opt = "-fcompare-debug=";
3650 arg = "";
3651 goto compare_debug_with_arg;
3653 case 1:
3654 compare_debug_replacement_opt = "-fcompare-debug=-gtoggle";
3655 arg = "-gtoggle";
3656 goto compare_debug_with_arg;
3658 default:
3659 gcc_unreachable ();
3661 break;
3663 case OPT_fcompare_debug_:
3664 compare_debug_replacement_opt = decoded->canonical_option[0];
3665 compare_debug_with_arg:
3666 gcc_assert (decoded->canonical_option_num_elements == 1);
3667 gcc_assert (arg != NULL);
3668 if (*arg)
3669 compare_debug = 1;
3670 else
3671 compare_debug = -1;
3672 if (compare_debug < 0)
3673 compare_debug_opt = NULL;
3674 else
3675 compare_debug_opt = arg;
3676 save_switch (compare_debug_replacement_opt, 0, NULL, validated, true);
3677 return true;
3679 case OPT_fdiagnostics_color_:
3680 diagnostic_color_init (dc, value);
3681 break;
3683 case OPT_Wa_:
3685 int prev, j;
3686 /* Pass the rest of this option to the assembler. */
3688 /* Split the argument at commas. */
3689 prev = 0;
3690 for (j = 0; arg[j]; j++)
3691 if (arg[j] == ',')
3693 add_assembler_option (arg + prev, j - prev);
3694 prev = j + 1;
3697 /* Record the part after the last comma. */
3698 add_assembler_option (arg + prev, j - prev);
3700 do_save = false;
3701 break;
3703 case OPT_Wp_:
3705 int prev, j;
3706 /* Pass the rest of this option to the preprocessor. */
3708 /* Split the argument at commas. */
3709 prev = 0;
3710 for (j = 0; arg[j]; j++)
3711 if (arg[j] == ',')
3713 add_preprocessor_option (arg + prev, j - prev);
3714 prev = j + 1;
3717 /* Record the part after the last comma. */
3718 add_preprocessor_option (arg + prev, j - prev);
3720 do_save = false;
3721 break;
3723 case OPT_Wl_:
3725 int prev, j;
3726 /* Split the argument at commas. */
3727 prev = 0;
3728 for (j = 0; arg[j]; j++)
3729 if (arg[j] == ',')
3731 add_infile (save_string (arg + prev, j - prev), "*");
3732 prev = j + 1;
3734 /* Record the part after the last comma. */
3735 add_infile (arg + prev, "*");
3737 do_save = false;
3738 break;
3740 case OPT_Xlinker:
3741 add_infile (arg, "*");
3742 do_save = false;
3743 break;
3745 case OPT_Xpreprocessor:
3746 add_preprocessor_option (arg, strlen (arg));
3747 do_save = false;
3748 break;
3750 case OPT_Xassembler:
3751 add_assembler_option (arg, strlen (arg));
3752 do_save = false;
3753 break;
3755 case OPT_l:
3756 /* POSIX allows separation of -l and the lib arg; canonicalize
3757 by concatenating -l with its arg */
3758 add_infile (concat ("-l", arg, NULL), "*");
3759 do_save = false;
3760 break;
3762 case OPT_L:
3763 /* Similarly, canonicalize -L for linkers that may not accept
3764 separate arguments. */
3765 save_switch (concat ("-L", arg, NULL), 0, NULL, validated, true);
3766 return true;
3768 case OPT_F:
3769 /* Likewise -F. */
3770 save_switch (concat ("-F", arg, NULL), 0, NULL, validated, true);
3771 return true;
3773 case OPT_save_temps:
3774 save_temps_flag = SAVE_TEMPS_CWD;
3775 validated = true;
3776 break;
3778 case OPT_save_temps_:
3779 if (strcmp (arg, "cwd") == 0)
3780 save_temps_flag = SAVE_TEMPS_CWD;
3781 else if (strcmp (arg, "obj") == 0
3782 || strcmp (arg, "object") == 0)
3783 save_temps_flag = SAVE_TEMPS_OBJ;
3784 else
3785 fatal_error (input_location, "%qs is an unknown -save-temps option",
3786 decoded->orig_option_with_args_text);
3787 break;
3789 case OPT_no_canonical_prefixes:
3790 /* Already handled as a special case, so ignored here. */
3791 do_save = false;
3792 break;
3794 case OPT_pipe:
3795 validated = true;
3796 /* These options set the variables specified in common.opt
3797 automatically, but do need to be saved for spec
3798 processing. */
3799 break;
3801 case OPT_specs_:
3803 struct user_specs *user = XNEW (struct user_specs);
3805 user->next = (struct user_specs *) 0;
3806 user->filename = arg;
3807 if (user_specs_tail)
3808 user_specs_tail->next = user;
3809 else
3810 user_specs_head = user;
3811 user_specs_tail = user;
3813 validated = true;
3814 break;
3816 case OPT__sysroot_:
3817 target_system_root = arg;
3818 target_system_root_changed = 1;
3819 do_save = false;
3820 break;
3822 case OPT_time_:
3823 if (report_times_to_file)
3824 fclose (report_times_to_file);
3825 report_times_to_file = fopen (arg, "a");
3826 do_save = false;
3827 break;
3829 case OPT____:
3830 /* "-###"
3831 This is similar to -v except that there is no execution
3832 of the commands and the echoed arguments are quoted. It
3833 is intended for use in shell scripts to capture the
3834 driver-generated command line. */
3835 verbose_only_flag++;
3836 verbose_flag = 1;
3837 do_save = false;
3838 break;
3840 case OPT_B:
3842 size_t len = strlen (arg);
3844 /* Catch the case where the user has forgotten to append a
3845 directory separator to the path. Note, they may be using
3846 -B to add an executable name prefix, eg "i386-elf-", in
3847 order to distinguish between multiple installations of
3848 GCC in the same directory. Hence we must check to see
3849 if appending a directory separator actually makes a
3850 valid directory name. */
3851 if (!IS_DIR_SEPARATOR (arg[len - 1])
3852 && is_directory (arg, false))
3854 char *tmp = XNEWVEC (char, len + 2);
3855 strcpy (tmp, arg);
3856 tmp[len] = DIR_SEPARATOR;
3857 tmp[++len] = 0;
3858 arg = tmp;
3861 add_prefix (&exec_prefixes, arg, NULL,
3862 PREFIX_PRIORITY_B_OPT, 0, 0);
3863 add_prefix (&startfile_prefixes, arg, NULL,
3864 PREFIX_PRIORITY_B_OPT, 0, 0);
3865 add_prefix (&include_prefixes, arg, NULL,
3866 PREFIX_PRIORITY_B_OPT, 0, 0);
3868 validated = true;
3869 break;
3871 case OPT_x:
3872 spec_lang = arg;
3873 if (!strcmp (spec_lang, "none"))
3874 /* Suppress the warning if -xnone comes after the last input
3875 file, because alternate command interfaces like g++ might
3876 find it useful to place -xnone after each input file. */
3877 spec_lang = 0;
3878 else
3879 last_language_n_infiles = n_infiles;
3880 do_save = false;
3881 break;
3883 case OPT_o:
3884 have_o = 1;
3885 #if defined(HAVE_TARGET_EXECUTABLE_SUFFIX) || defined(HAVE_TARGET_OBJECT_SUFFIX)
3886 arg = convert_filename (arg, ! have_c, 0);
3887 #endif
3888 output_file = arg;
3889 /* Save the output name in case -save-temps=obj was used. */
3890 save_temps_prefix = xstrdup (arg);
3891 /* On some systems, ld cannot handle "-o" without a space. So
3892 split the option from its argument. */
3893 save_switch ("-o", 1, &arg, validated, true);
3894 return true;
3896 #ifdef ENABLE_DEFAULT_PIE
3897 case OPT_pie:
3898 /* -pie is turned on by default. */
3899 #endif
3901 case OPT_static_libgcc:
3902 case OPT_shared_libgcc:
3903 case OPT_static_libgfortran:
3904 case OPT_static_libstdc__:
3905 /* These are always valid, since gcc.c itself understands the
3906 first two, gfortranspec.c understands -static-libgfortran and
3907 g++spec.c understands -static-libstdc++ */
3908 validated = true;
3909 break;
3911 case OPT_fwpa:
3912 flag_wpa = "";
3913 break;
3915 case OPT_foffload_:
3916 handle_foffload_option (arg);
3917 break;
3919 default:
3920 /* Various driver options need no special processing at this
3921 point, having been handled in a prescan above or being
3922 handled by specs. */
3923 break;
3926 if (do_save)
3927 save_switch (decoded->canonical_option[0],
3928 decoded->canonical_option_num_elements - 1,
3929 &decoded->canonical_option[1], validated, true);
3930 return true;
3933 /* Put the driver's standard set of option handlers in *HANDLERS. */
3935 static void
3936 set_option_handlers (struct cl_option_handlers *handlers)
3938 handlers->unknown_option_callback = driver_unknown_option_callback;
3939 handlers->wrong_lang_callback = driver_wrong_lang_callback;
3940 handlers->num_handlers = 3;
3941 handlers->handlers[0].handler = driver_handle_option;
3942 handlers->handlers[0].mask = CL_DRIVER;
3943 handlers->handlers[1].handler = common_handle_option;
3944 handlers->handlers[1].mask = CL_COMMON;
3945 handlers->handlers[2].handler = target_handle_option;
3946 handlers->handlers[2].mask = CL_TARGET;
3949 /* Create the vector `switches' and its contents.
3950 Store its length in `n_switches'. */
3952 static void
3953 process_command (unsigned int decoded_options_count,
3954 struct cl_decoded_option *decoded_options)
3956 const char *temp;
3957 char *temp1;
3958 char *tooldir_prefix, *tooldir_prefix2;
3959 char *(*get_relative_prefix) (const char *, const char *,
3960 const char *) = NULL;
3961 struct cl_option_handlers handlers;
3962 unsigned int j;
3964 gcc_exec_prefix = getenv ("GCC_EXEC_PREFIX");
3966 n_switches = 0;
3967 n_infiles = 0;
3968 added_libraries = 0;
3970 /* Figure compiler version from version string. */
3972 compiler_version = temp1 = xstrdup (version_string);
3974 for (; *temp1; ++temp1)
3976 if (*temp1 == ' ')
3978 *temp1 = '\0';
3979 break;
3983 /* Handle any -no-canonical-prefixes flag early, to assign the function
3984 that builds relative prefixes. This function creates default search
3985 paths that are needed later in normal option handling. */
3987 for (j = 1; j < decoded_options_count; j++)
3989 if (decoded_options[j].opt_index == OPT_no_canonical_prefixes)
3991 get_relative_prefix = make_relative_prefix_ignore_links;
3992 break;
3995 if (! get_relative_prefix)
3996 get_relative_prefix = make_relative_prefix;
3998 /* Set up the default search paths. If there is no GCC_EXEC_PREFIX,
3999 see if we can create it from the pathname specified in
4000 decoded_options[0].arg. */
4002 gcc_libexec_prefix = standard_libexec_prefix;
4003 #ifndef VMS
4004 /* FIXME: make_relative_prefix doesn't yet work for VMS. */
4005 if (!gcc_exec_prefix)
4007 gcc_exec_prefix = get_relative_prefix (decoded_options[0].arg,
4008 standard_bindir_prefix,
4009 standard_exec_prefix);
4010 gcc_libexec_prefix = get_relative_prefix (decoded_options[0].arg,
4011 standard_bindir_prefix,
4012 standard_libexec_prefix);
4013 if (gcc_exec_prefix)
4014 xputenv (concat ("GCC_EXEC_PREFIX=", gcc_exec_prefix, NULL));
4016 else
4018 /* make_relative_prefix requires a program name, but
4019 GCC_EXEC_PREFIX is typically a directory name with a trailing
4020 / (which is ignored by make_relative_prefix), so append a
4021 program name. */
4022 char *tmp_prefix = concat (gcc_exec_prefix, "gcc", NULL);
4023 gcc_libexec_prefix = get_relative_prefix (tmp_prefix,
4024 standard_exec_prefix,
4025 standard_libexec_prefix);
4027 /* The path is unrelocated, so fallback to the original setting. */
4028 if (!gcc_libexec_prefix)
4029 gcc_libexec_prefix = standard_libexec_prefix;
4031 free (tmp_prefix);
4033 #else
4034 #endif
4035 /* From this point onward, gcc_exec_prefix is non-null if the toolchain
4036 is relocated. The toolchain was either relocated using GCC_EXEC_PREFIX
4037 or an automatically created GCC_EXEC_PREFIX from
4038 decoded_options[0].arg. */
4040 /* Do language-specific adjustment/addition of flags. */
4041 lang_specific_driver (&decoded_options, &decoded_options_count,
4042 &added_libraries);
4044 if (gcc_exec_prefix)
4046 int len = strlen (gcc_exec_prefix);
4048 if (len > (int) sizeof ("/lib/gcc/") - 1
4049 && (IS_DIR_SEPARATOR (gcc_exec_prefix[len-1])))
4051 temp = gcc_exec_prefix + len - sizeof ("/lib/gcc/") + 1;
4052 if (IS_DIR_SEPARATOR (*temp)
4053 && filename_ncmp (temp + 1, "lib", 3) == 0
4054 && IS_DIR_SEPARATOR (temp[4])
4055 && filename_ncmp (temp + 5, "gcc", 3) == 0)
4056 len -= sizeof ("/lib/gcc/") - 1;
4059 set_std_prefix (gcc_exec_prefix, len);
4060 add_prefix (&exec_prefixes, gcc_libexec_prefix, "GCC",
4061 PREFIX_PRIORITY_LAST, 0, 0);
4062 add_prefix (&startfile_prefixes, gcc_exec_prefix, "GCC",
4063 PREFIX_PRIORITY_LAST, 0, 0);
4066 /* COMPILER_PATH and LIBRARY_PATH have values
4067 that are lists of directory names with colons. */
4069 temp = getenv ("COMPILER_PATH");
4070 if (temp)
4072 const char *startp, *endp;
4073 char *nstore = (char *) alloca (strlen (temp) + 3);
4075 startp = endp = temp;
4076 while (1)
4078 if (*endp == PATH_SEPARATOR || *endp == 0)
4080 strncpy (nstore, startp, endp - startp);
4081 if (endp == startp)
4082 strcpy (nstore, concat (".", dir_separator_str, NULL));
4083 else if (!IS_DIR_SEPARATOR (endp[-1]))
4085 nstore[endp - startp] = DIR_SEPARATOR;
4086 nstore[endp - startp + 1] = 0;
4088 else
4089 nstore[endp - startp] = 0;
4090 add_prefix (&exec_prefixes, nstore, 0,
4091 PREFIX_PRIORITY_LAST, 0, 0);
4092 add_prefix (&include_prefixes, nstore, 0,
4093 PREFIX_PRIORITY_LAST, 0, 0);
4094 if (*endp == 0)
4095 break;
4096 endp = startp = endp + 1;
4098 else
4099 endp++;
4103 temp = getenv (LIBRARY_PATH_ENV);
4104 if (temp && *cross_compile == '0')
4106 const char *startp, *endp;
4107 char *nstore = (char *) alloca (strlen (temp) + 3);
4109 startp = endp = temp;
4110 while (1)
4112 if (*endp == PATH_SEPARATOR || *endp == 0)
4114 strncpy (nstore, startp, endp - startp);
4115 if (endp == startp)
4116 strcpy (nstore, concat (".", dir_separator_str, NULL));
4117 else if (!IS_DIR_SEPARATOR (endp[-1]))
4119 nstore[endp - startp] = DIR_SEPARATOR;
4120 nstore[endp - startp + 1] = 0;
4122 else
4123 nstore[endp - startp] = 0;
4124 add_prefix (&startfile_prefixes, nstore, NULL,
4125 PREFIX_PRIORITY_LAST, 0, 1);
4126 if (*endp == 0)
4127 break;
4128 endp = startp = endp + 1;
4130 else
4131 endp++;
4135 /* Use LPATH like LIBRARY_PATH (for the CMU build program). */
4136 temp = getenv ("LPATH");
4137 if (temp && *cross_compile == '0')
4139 const char *startp, *endp;
4140 char *nstore = (char *) alloca (strlen (temp) + 3);
4142 startp = endp = temp;
4143 while (1)
4145 if (*endp == PATH_SEPARATOR || *endp == 0)
4147 strncpy (nstore, startp, endp - startp);
4148 if (endp == startp)
4149 strcpy (nstore, concat (".", dir_separator_str, NULL));
4150 else if (!IS_DIR_SEPARATOR (endp[-1]))
4152 nstore[endp - startp] = DIR_SEPARATOR;
4153 nstore[endp - startp + 1] = 0;
4155 else
4156 nstore[endp - startp] = 0;
4157 add_prefix (&startfile_prefixes, nstore, NULL,
4158 PREFIX_PRIORITY_LAST, 0, 1);
4159 if (*endp == 0)
4160 break;
4161 endp = startp = endp + 1;
4163 else
4164 endp++;
4168 /* Process the options and store input files and switches in their
4169 vectors. */
4171 last_language_n_infiles = -1;
4173 set_option_handlers (&handlers);
4175 for (j = 1; j < decoded_options_count; j++)
4177 switch (decoded_options[j].opt_index)
4179 case OPT_S:
4180 case OPT_c:
4181 case OPT_E:
4182 have_c = 1;
4183 break;
4185 if (have_c)
4186 break;
4189 for (j = 1; j < decoded_options_count; j++)
4191 if (decoded_options[j].opt_index == OPT_SPECIAL_input_file)
4193 const char *arg = decoded_options[j].arg;
4194 const char *p = strrchr (arg, '@');
4195 char *fname;
4196 long offset;
4197 int consumed;
4198 #ifdef HAVE_TARGET_OBJECT_SUFFIX
4199 arg = convert_filename (arg, 0, access (arg, F_OK));
4200 #endif
4201 /* For LTO static archive support we handle input file
4202 specifications that are composed of a filename and
4203 an offset like FNAME@OFFSET. */
4204 if (p
4205 && p != arg
4206 && sscanf (p, "@%li%n", &offset, &consumed) >= 1
4207 && strlen (p) == (unsigned int)consumed)
4209 fname = (char *)xmalloc (p - arg + 1);
4210 memcpy (fname, arg, p - arg);
4211 fname[p - arg] = '\0';
4212 /* Only accept non-stdin and existing FNAME parts, otherwise
4213 try with the full name. */
4214 if (strcmp (fname, "-") == 0 || access (fname, F_OK) < 0)
4216 free (fname);
4217 fname = xstrdup (arg);
4220 else
4221 fname = xstrdup (arg);
4223 if (strcmp (fname, "-") != 0 && access (fname, F_OK) < 0)
4224 perror_with_name (fname);
4225 else
4226 add_infile (arg, spec_lang);
4228 free (fname);
4229 continue;
4232 read_cmdline_option (&global_options, &global_options_set,
4233 decoded_options + j, UNKNOWN_LOCATION,
4234 CL_DRIVER, &handlers, global_dc);
4237 if (output_file
4238 && strcmp (output_file, "-") != 0
4239 && strcmp (output_file, HOST_BIT_BUCKET) != 0)
4241 int i;
4242 for (i = 0; i < n_infiles; i++)
4243 if ((!infiles[i].language || infiles[i].language[0] != '*')
4244 && canonical_filename_eq (infiles[i].name, output_file))
4245 fatal_error (input_location,
4246 "input file %qs is the same as output file",
4247 output_file);
4250 /* If -save-temps=obj and -o name, create the prefix to use for %b.
4251 Otherwise just make -save-temps=obj the same as -save-temps=cwd. */
4252 if (save_temps_flag == SAVE_TEMPS_OBJ && save_temps_prefix != NULL)
4254 save_temps_length = strlen (save_temps_prefix);
4255 temp = strrchr (lbasename (save_temps_prefix), '.');
4256 if (temp)
4258 save_temps_length -= strlen (temp);
4259 save_temps_prefix[save_temps_length] = '\0';
4263 else if (save_temps_prefix != NULL)
4265 free (save_temps_prefix);
4266 save_temps_prefix = NULL;
4269 if (save_temps_flag && use_pipes)
4271 /* -save-temps overrides -pipe, so that temp files are produced */
4272 if (save_temps_flag)
4273 warning (0, "-pipe ignored because -save-temps specified");
4274 use_pipes = 0;
4277 if (!compare_debug)
4279 const char *gcd = getenv ("GCC_COMPARE_DEBUG");
4281 if (gcd && gcd[0] == '-')
4283 compare_debug = 2;
4284 compare_debug_opt = gcd;
4286 else if (gcd && *gcd && strcmp (gcd, "0"))
4288 compare_debug = 3;
4289 compare_debug_opt = "-gtoggle";
4292 else if (compare_debug < 0)
4294 compare_debug = 0;
4295 gcc_assert (!compare_debug_opt);
4298 /* Set up the search paths. We add directories that we expect to
4299 contain GNU Toolchain components before directories specified by
4300 the machine description so that we will find GNU components (like
4301 the GNU assembler) before those of the host system. */
4303 /* If we don't know where the toolchain has been installed, use the
4304 configured-in locations. */
4305 if (!gcc_exec_prefix)
4307 #ifndef OS2
4308 add_prefix (&exec_prefixes, standard_libexec_prefix, "GCC",
4309 PREFIX_PRIORITY_LAST, 1, 0);
4310 add_prefix (&exec_prefixes, standard_libexec_prefix, "BINUTILS",
4311 PREFIX_PRIORITY_LAST, 2, 0);
4312 add_prefix (&exec_prefixes, standard_exec_prefix, "BINUTILS",
4313 PREFIX_PRIORITY_LAST, 2, 0);
4314 #endif
4315 add_prefix (&startfile_prefixes, standard_exec_prefix, "BINUTILS",
4316 PREFIX_PRIORITY_LAST, 1, 0);
4319 gcc_assert (!IS_ABSOLUTE_PATH (tooldir_base_prefix));
4320 tooldir_prefix2 = concat (tooldir_base_prefix, spec_host_machine,
4321 dir_separator_str, NULL);
4323 /* Look for tools relative to the location from which the driver is
4324 running, or, if that is not available, the configured prefix. */
4325 tooldir_prefix
4326 = concat (gcc_exec_prefix ? gcc_exec_prefix : standard_exec_prefix,
4327 spec_host_machine, dir_separator_str, spec_version,
4328 accel_dir_suffix, dir_separator_str, tooldir_prefix2, NULL);
4329 free (tooldir_prefix2);
4331 add_prefix (&exec_prefixes,
4332 concat (tooldir_prefix, "bin", dir_separator_str, NULL),
4333 "BINUTILS", PREFIX_PRIORITY_LAST, 0, 0);
4334 add_prefix (&startfile_prefixes,
4335 concat (tooldir_prefix, "lib", dir_separator_str, NULL),
4336 "BINUTILS", PREFIX_PRIORITY_LAST, 0, 1);
4337 free (tooldir_prefix);
4339 #if defined(TARGET_SYSTEM_ROOT_RELOCATABLE) && !defined(VMS)
4340 /* If the normal TARGET_SYSTEM_ROOT is inside of $exec_prefix,
4341 then consider it to relocate with the rest of the GCC installation
4342 if GCC_EXEC_PREFIX is set.
4343 ``make_relative_prefix'' is not compiled for VMS, so don't call it. */
4344 if (target_system_root && !target_system_root_changed && gcc_exec_prefix)
4346 char *tmp_prefix = get_relative_prefix (decoded_options[0].arg,
4347 standard_bindir_prefix,
4348 target_system_root);
4349 if (tmp_prefix && access_check (tmp_prefix, F_OK) == 0)
4351 target_system_root = tmp_prefix;
4352 target_system_root_changed = 1;
4355 #endif
4357 /* More prefixes are enabled in main, after we read the specs file
4358 and determine whether this is cross-compilation or not. */
4360 if (n_infiles == last_language_n_infiles && spec_lang != 0)
4361 warning (0, "%<-x %s%> after last input file has no effect", spec_lang);
4363 /* Synthesize -fcompare-debug flag from the GCC_COMPARE_DEBUG
4364 environment variable. */
4365 if (compare_debug == 2 || compare_debug == 3)
4367 const char *opt = concat ("-fcompare-debug=", compare_debug_opt, NULL);
4368 save_switch (opt, 0, NULL, false, true);
4369 compare_debug = 1;
4372 /* Ensure we only invoke each subprocess once. */
4373 if (print_subprocess_help || print_help_list || print_version)
4375 n_infiles = 0;
4377 /* Create a dummy input file, so that we can pass
4378 the help option on to the various sub-processes. */
4379 add_infile ("help-dummy", "c");
4382 alloc_switch ();
4383 switches[n_switches].part1 = 0;
4384 alloc_infile ();
4385 infiles[n_infiles].name = 0;
4388 /* Store switches not filtered out by %<S in spec in COLLECT_GCC_OPTIONS
4389 and place that in the environment. */
4391 static void
4392 set_collect_gcc_options (void)
4394 int i;
4395 int first_time;
4397 /* Build COLLECT_GCC_OPTIONS to have all of the options specified to
4398 the compiler. */
4399 obstack_grow (&collect_obstack, "COLLECT_GCC_OPTIONS=",
4400 sizeof ("COLLECT_GCC_OPTIONS=") - 1);
4402 first_time = TRUE;
4403 for (i = 0; (int) i < n_switches; i++)
4405 const char *const *args;
4406 const char *p, *q;
4407 if (!first_time)
4408 obstack_grow (&collect_obstack, " ", 1);
4410 first_time = FALSE;
4412 /* Ignore elided switches. */
4413 if ((switches[i].live_cond
4414 & (SWITCH_IGNORE | SWITCH_KEEP_FOR_GCC))
4415 == SWITCH_IGNORE)
4416 continue;
4418 obstack_grow (&collect_obstack, "'-", 2);
4419 q = switches[i].part1;
4420 while ((p = strchr (q, '\'')))
4422 obstack_grow (&collect_obstack, q, p - q);
4423 obstack_grow (&collect_obstack, "'\\''", 4);
4424 q = ++p;
4426 obstack_grow (&collect_obstack, q, strlen (q));
4427 obstack_grow (&collect_obstack, "'", 1);
4429 for (args = switches[i].args; args && *args; args++)
4431 obstack_grow (&collect_obstack, " '", 2);
4432 q = *args;
4433 while ((p = strchr (q, '\'')))
4435 obstack_grow (&collect_obstack, q, p - q);
4436 obstack_grow (&collect_obstack, "'\\''", 4);
4437 q = ++p;
4439 obstack_grow (&collect_obstack, q, strlen (q));
4440 obstack_grow (&collect_obstack, "'", 1);
4443 obstack_grow (&collect_obstack, "\0", 1);
4444 xputenv (XOBFINISH (&collect_obstack, char *));
4447 /* Process a spec string, accumulating and running commands. */
4449 /* These variables describe the input file name.
4450 input_file_number is the index on outfiles of this file,
4451 so that the output file name can be stored for later use by %o.
4452 input_basename is the start of the part of the input file
4453 sans all directory names, and basename_length is the number
4454 of characters starting there excluding the suffix .c or whatever. */
4456 static const char *gcc_input_filename;
4457 static int input_file_number;
4458 size_t input_filename_length;
4459 static int basename_length;
4460 static int suffixed_basename_length;
4461 static const char *input_basename;
4462 static const char *input_suffix;
4463 #ifndef HOST_LACKS_INODE_NUMBERS
4464 static struct stat input_stat;
4465 #endif
4466 static int input_stat_set;
4468 /* The compiler used to process the current input file. */
4469 static struct compiler *input_file_compiler;
4471 /* These are variables used within do_spec and do_spec_1. */
4473 /* Nonzero if an arg has been started and not yet terminated
4474 (with space, tab or newline). */
4475 static int arg_going;
4477 /* Nonzero means %d or %g has been seen; the next arg to be terminated
4478 is a temporary file name. */
4479 static int delete_this_arg;
4481 /* Nonzero means %w has been seen; the next arg to be terminated
4482 is the output file name of this compilation. */
4483 static int this_is_output_file;
4485 /* Nonzero means %s has been seen; the next arg to be terminated
4486 is the name of a library file and we should try the standard
4487 search dirs for it. */
4488 static int this_is_library_file;
4490 /* Nonzero means %T has been seen; the next arg to be terminated
4491 is the name of a linker script and we should try all of the
4492 standard search dirs for it. If it is found insert a --script
4493 command line switch and then substitute the full path in place,
4494 otherwise generate an error message. */
4495 static int this_is_linker_script;
4497 /* Nonzero means that the input of this command is coming from a pipe. */
4498 static int input_from_pipe;
4500 /* Nonnull means substitute this for any suffix when outputting a switches
4501 arguments. */
4502 static const char *suffix_subst;
4504 /* If there is an argument being accumulated, terminate it and store it. */
4506 static void
4507 end_going_arg (void)
4509 if (arg_going)
4511 const char *string;
4513 obstack_1grow (&obstack, 0);
4514 string = XOBFINISH (&obstack, const char *);
4515 if (this_is_library_file)
4516 string = find_file (string);
4517 if (this_is_linker_script)
4519 char * full_script_path = find_a_file (&startfile_prefixes, string, R_OK, true);
4521 if (full_script_path == NULL)
4523 error ("unable to locate default linker script %qs in the library search paths", string);
4524 /* Script was not found on search path. */
4525 return;
4527 store_arg ("--script", false, false);
4528 string = full_script_path;
4530 store_arg (string, delete_this_arg, this_is_output_file);
4531 if (this_is_output_file)
4532 outfiles[input_file_number] = string;
4533 arg_going = 0;
4538 /* Parse the WRAPPER string which is a comma separated list of the command line
4539 and insert them into the beginning of argbuf. */
4541 static void
4542 insert_wrapper (const char *wrapper)
4544 int n = 0;
4545 int i;
4546 char *buf = xstrdup (wrapper);
4547 char *p = buf;
4548 unsigned int old_length = argbuf.length ();
4552 n++;
4553 while (*p == ',')
4554 p++;
4556 while ((p = strchr (p, ',')) != NULL);
4558 argbuf.safe_grow (old_length + n);
4559 memmove (argbuf.address () + n,
4560 argbuf.address (),
4561 old_length * sizeof (const_char_p));
4563 i = 0;
4564 p = buf;
4567 while (*p == ',')
4569 *p = 0;
4570 p++;
4572 argbuf[i] = p;
4573 i++;
4575 while ((p = strchr (p, ',')) != NULL);
4576 gcc_assert (i == n);
4579 /* Process the spec SPEC and run the commands specified therein.
4580 Returns 0 if the spec is successfully processed; -1 if failed. */
4583 do_spec (const char *spec)
4585 int value;
4587 value = do_spec_2 (spec);
4589 /* Force out any unfinished command.
4590 If -pipe, this forces out the last command if it ended in `|'. */
4591 if (value == 0)
4593 if (argbuf.length () > 0
4594 && !strcmp (argbuf.last (), "|"))
4595 argbuf.pop ();
4597 set_collect_gcc_options ();
4599 if (argbuf.length () > 0)
4600 value = execute ();
4603 return value;
4606 static int
4607 do_spec_2 (const char *spec)
4609 int result;
4611 clear_args ();
4612 arg_going = 0;
4613 delete_this_arg = 0;
4614 this_is_output_file = 0;
4615 this_is_library_file = 0;
4616 this_is_linker_script = 0;
4617 input_from_pipe = 0;
4618 suffix_subst = NULL;
4620 result = do_spec_1 (spec, 0, NULL);
4622 end_going_arg ();
4624 return result;
4628 /* Process the given spec string and add any new options to the end
4629 of the switches/n_switches array. */
4631 static void
4632 do_option_spec (const char *name, const char *spec)
4634 unsigned int i, value_count, value_len;
4635 const char *p, *q, *value;
4636 char *tmp_spec, *tmp_spec_p;
4638 if (configure_default_options[0].name == NULL)
4639 return;
4641 for (i = 0; i < ARRAY_SIZE (configure_default_options); i++)
4642 if (strcmp (configure_default_options[i].name, name) == 0)
4643 break;
4644 if (i == ARRAY_SIZE (configure_default_options))
4645 return;
4647 value = configure_default_options[i].value;
4648 value_len = strlen (value);
4650 /* Compute the size of the final spec. */
4651 value_count = 0;
4652 p = spec;
4653 while ((p = strstr (p, "%(VALUE)")) != NULL)
4655 p ++;
4656 value_count ++;
4659 /* Replace each %(VALUE) by the specified value. */
4660 tmp_spec = (char *) alloca (strlen (spec) + 1
4661 + value_count * (value_len - strlen ("%(VALUE)")));
4662 tmp_spec_p = tmp_spec;
4663 q = spec;
4664 while ((p = strstr (q, "%(VALUE)")) != NULL)
4666 memcpy (tmp_spec_p, q, p - q);
4667 tmp_spec_p = tmp_spec_p + (p - q);
4668 memcpy (tmp_spec_p, value, value_len);
4669 tmp_spec_p += value_len;
4670 q = p + strlen ("%(VALUE)");
4672 strcpy (tmp_spec_p, q);
4674 do_self_spec (tmp_spec);
4677 /* Process the given spec string and add any new options to the end
4678 of the switches/n_switches array. */
4680 static void
4681 do_self_spec (const char *spec)
4683 int i;
4685 do_spec_2 (spec);
4686 do_spec_1 (" ", 0, NULL);
4688 /* Mark %<S switches processed by do_self_spec to be ignored permanently.
4689 do_self_specs adds the replacements to switches array, so it shouldn't
4690 be processed afterwards. */
4691 for (i = 0; i < n_switches; i++)
4692 if ((switches[i].live_cond & SWITCH_IGNORE))
4693 switches[i].live_cond |= SWITCH_IGNORE_PERMANENTLY;
4695 if (argbuf.length () > 0)
4697 const char **argbuf_copy;
4698 struct cl_decoded_option *decoded_options;
4699 struct cl_option_handlers handlers;
4700 unsigned int decoded_options_count;
4701 unsigned int j;
4703 /* Create a copy of argbuf with a dummy argv[0] entry for
4704 decode_cmdline_options_to_array. */
4705 argbuf_copy = XNEWVEC (const char *,
4706 argbuf.length () + 1);
4707 argbuf_copy[0] = "";
4708 memcpy (argbuf_copy + 1, argbuf.address (),
4709 argbuf.length () * sizeof (const char *));
4711 decode_cmdline_options_to_array (argbuf.length () + 1,
4712 argbuf_copy,
4713 CL_DRIVER, &decoded_options,
4714 &decoded_options_count);
4715 free (argbuf_copy);
4717 set_option_handlers (&handlers);
4719 for (j = 1; j < decoded_options_count; j++)
4721 switch (decoded_options[j].opt_index)
4723 case OPT_SPECIAL_input_file:
4724 /* Specs should only generate options, not input
4725 files. */
4726 if (strcmp (decoded_options[j].arg, "-") != 0)
4727 fatal_error (input_location,
4728 "switch %qs does not start with %<-%>",
4729 decoded_options[j].arg);
4730 else
4731 fatal_error (input_location,
4732 "spec-generated switch is just %<-%>");
4733 break;
4735 case OPT_fcompare_debug_second:
4736 case OPT_fcompare_debug:
4737 case OPT_fcompare_debug_:
4738 case OPT_o:
4739 /* Avoid duplicate processing of some options from
4740 compare-debug specs; just save them here. */
4741 save_switch (decoded_options[j].canonical_option[0],
4742 (decoded_options[j].canonical_option_num_elements
4743 - 1),
4744 &decoded_options[j].canonical_option[1], false, true);
4745 break;
4747 default:
4748 read_cmdline_option (&global_options, &global_options_set,
4749 decoded_options + j, UNKNOWN_LOCATION,
4750 CL_DRIVER, &handlers, global_dc);
4751 break;
4755 free (decoded_options);
4757 alloc_switch ();
4758 switches[n_switches].part1 = 0;
4762 /* Callback for processing %D and %I specs. */
4764 struct spec_path_info {
4765 const char *option;
4766 const char *append;
4767 size_t append_len;
4768 bool omit_relative;
4769 bool separate_options;
4772 static void *
4773 spec_path (char *path, void *data)
4775 struct spec_path_info *info = (struct spec_path_info *) data;
4776 size_t len = 0;
4777 char save = 0;
4779 if (info->omit_relative && !IS_ABSOLUTE_PATH (path))
4780 return NULL;
4782 if (info->append_len != 0)
4784 len = strlen (path);
4785 memcpy (path + len, info->append, info->append_len + 1);
4788 if (!is_directory (path, true))
4789 return NULL;
4791 do_spec_1 (info->option, 1, NULL);
4792 if (info->separate_options)
4793 do_spec_1 (" ", 0, NULL);
4795 if (info->append_len == 0)
4797 len = strlen (path);
4798 save = path[len - 1];
4799 if (IS_DIR_SEPARATOR (path[len - 1]))
4800 path[len - 1] = '\0';
4803 do_spec_1 (path, 1, NULL);
4804 do_spec_1 (" ", 0, NULL);
4806 /* Must not damage the original path. */
4807 if (info->append_len == 0)
4808 path[len - 1] = save;
4810 return NULL;
4813 /* Create a temporary FILE with the contents of ARGV. Add @FILE to the
4814 argument list. */
4816 static void
4817 create_at_file (char **argv)
4819 char *temp_file = make_temp_file ("");
4820 char *at_argument = concat ("@", temp_file, NULL);
4821 FILE *f = fopen (temp_file, "w");
4822 int status;
4824 if (f == NULL)
4825 fatal_error (input_location, "could not open temporary response file %s",
4826 temp_file);
4828 status = writeargv (argv, f);
4830 if (status)
4831 fatal_error (input_location,
4832 "could not write to temporary response file %s",
4833 temp_file);
4835 status = fclose (f);
4837 if (EOF == status)
4838 fatal_error (input_location, "could not close temporary response file %s",
4839 temp_file);
4841 store_arg (at_argument, 0, 0);
4843 record_temp_file (temp_file, !save_temps_flag, !save_temps_flag);
4846 /* True if we should compile INFILE. */
4848 static bool
4849 compile_input_file_p (struct infile *infile)
4851 if ((!infile->language) || (infile->language[0] != '*'))
4852 if (infile->incompiler == input_file_compiler)
4853 return true;
4854 return false;
4857 /* Process each member of VEC as a spec. */
4859 static void
4860 do_specs_vec (vec<char_p> vec)
4862 unsigned ix;
4863 char *opt;
4865 FOR_EACH_VEC_ELT (vec, ix, opt)
4867 do_spec_1 (opt, 1, NULL);
4868 /* Make each accumulated option a separate argument. */
4869 do_spec_1 (" ", 0, NULL);
4873 /* Process the sub-spec SPEC as a portion of a larger spec.
4874 This is like processing a whole spec except that we do
4875 not initialize at the beginning and we do not supply a
4876 newline by default at the end.
4877 INSWITCH nonzero means don't process %-sequences in SPEC;
4878 in this case, % is treated as an ordinary character.
4879 This is used while substituting switches.
4880 INSWITCH nonzero also causes SPC not to terminate an argument.
4882 Value is zero unless a line was finished
4883 and the command on that line reported an error. */
4885 static int
4886 do_spec_1 (const char *spec, int inswitch, const char *soft_matched_part)
4888 const char *p = spec;
4889 int c;
4890 int i;
4891 int value;
4893 /* If it's an empty string argument to a switch, keep it as is. */
4894 if (inswitch && !*p)
4895 arg_going = 1;
4897 while ((c = *p++))
4898 /* If substituting a switch, treat all chars like letters.
4899 Otherwise, NL, SPC, TAB and % are special. */
4900 switch (inswitch ? 'a' : c)
4902 case '\n':
4903 end_going_arg ();
4905 if (argbuf.length () > 0
4906 && !strcmp (argbuf.last (), "|"))
4908 /* A `|' before the newline means use a pipe here,
4909 but only if -pipe was specified.
4910 Otherwise, execute now and don't pass the `|' as an arg. */
4911 if (use_pipes)
4913 input_from_pipe = 1;
4914 break;
4916 else
4917 argbuf.pop ();
4920 set_collect_gcc_options ();
4922 if (argbuf.length () > 0)
4924 value = execute ();
4925 if (value)
4926 return value;
4928 /* Reinitialize for a new command, and for a new argument. */
4929 clear_args ();
4930 arg_going = 0;
4931 delete_this_arg = 0;
4932 this_is_output_file = 0;
4933 this_is_library_file = 0;
4934 this_is_linker_script = 0;
4935 input_from_pipe = 0;
4936 break;
4938 case '|':
4939 end_going_arg ();
4941 /* Use pipe */
4942 obstack_1grow (&obstack, c);
4943 arg_going = 1;
4944 break;
4946 case '\t':
4947 case ' ':
4948 end_going_arg ();
4950 /* Reinitialize for a new argument. */
4951 delete_this_arg = 0;
4952 this_is_output_file = 0;
4953 this_is_library_file = 0;
4954 this_is_linker_script = 0;
4955 break;
4957 case '%':
4958 switch (c = *p++)
4960 case 0:
4961 fatal_error (input_location, "spec %qs invalid", spec);
4963 case 'b':
4964 if (save_temps_length)
4965 obstack_grow (&obstack, save_temps_prefix, save_temps_length);
4966 else
4967 obstack_grow (&obstack, input_basename, basename_length);
4968 if (compare_debug < 0)
4969 obstack_grow (&obstack, ".gk", 3);
4970 arg_going = 1;
4971 break;
4973 case 'B':
4974 if (save_temps_length)
4975 obstack_grow (&obstack, save_temps_prefix, save_temps_length);
4976 else
4977 obstack_grow (&obstack, input_basename, suffixed_basename_length);
4978 if (compare_debug < 0)
4979 obstack_grow (&obstack, ".gk", 3);
4980 arg_going = 1;
4981 break;
4983 case 'd':
4984 delete_this_arg = 2;
4985 break;
4987 /* Dump out the directories specified with LIBRARY_PATH,
4988 followed by the absolute directories
4989 that we search for startfiles. */
4990 case 'D':
4992 struct spec_path_info info;
4994 info.option = "-L";
4995 info.append_len = 0;
4996 #ifdef RELATIVE_PREFIX_NOT_LINKDIR
4997 /* Used on systems which record the specified -L dirs
4998 and use them to search for dynamic linking.
4999 Relative directories always come from -B,
5000 and it is better not to use them for searching
5001 at run time. In particular, stage1 loses. */
5002 info.omit_relative = true;
5003 #else
5004 info.omit_relative = false;
5005 #endif
5006 info.separate_options = false;
5008 for_each_path (&startfile_prefixes, true, 0, spec_path, &info);
5010 break;
5012 case 'e':
5013 /* %efoo means report an error with `foo' as error message
5014 and don't execute any more commands for this file. */
5016 const char *q = p;
5017 char *buf;
5018 while (*p != 0 && *p != '\n')
5019 p++;
5020 buf = (char *) alloca (p - q + 1);
5021 strncpy (buf, q, p - q);
5022 buf[p - q] = 0;
5023 error ("%s", _(buf));
5024 return -1;
5026 break;
5027 case 'n':
5028 /* %nfoo means report a notice with `foo' on stderr. */
5030 const char *q = p;
5031 char *buf;
5032 while (*p != 0 && *p != '\n')
5033 p++;
5034 buf = (char *) alloca (p - q + 1);
5035 strncpy (buf, q, p - q);
5036 buf[p - q] = 0;
5037 inform (0, "%s", _(buf));
5038 if (*p)
5039 p++;
5041 break;
5043 case 'j':
5045 struct stat st;
5047 /* If save_temps_flag is off, and the HOST_BIT_BUCKET is
5048 defined, and it is not a directory, and it is
5049 writable, use it. Otherwise, treat this like any
5050 other temporary file. */
5052 if ((!save_temps_flag)
5053 && (stat (HOST_BIT_BUCKET, &st) == 0) && (!S_ISDIR (st.st_mode))
5054 && (access (HOST_BIT_BUCKET, W_OK) == 0))
5056 obstack_grow (&obstack, HOST_BIT_BUCKET,
5057 strlen (HOST_BIT_BUCKET));
5058 delete_this_arg = 0;
5059 arg_going = 1;
5060 break;
5063 goto create_temp_file;
5064 case '|':
5065 if (use_pipes)
5067 obstack_1grow (&obstack, '-');
5068 delete_this_arg = 0;
5069 arg_going = 1;
5071 /* consume suffix */
5072 while (*p == '.' || ISALNUM ((unsigned char) *p))
5073 p++;
5074 if (p[0] == '%' && p[1] == 'O')
5075 p += 2;
5077 break;
5079 goto create_temp_file;
5080 case 'm':
5081 if (use_pipes)
5083 /* consume suffix */
5084 while (*p == '.' || ISALNUM ((unsigned char) *p))
5085 p++;
5086 if (p[0] == '%' && p[1] == 'O')
5087 p += 2;
5089 break;
5091 goto create_temp_file;
5092 case 'g':
5093 case 'u':
5094 case 'U':
5095 create_temp_file:
5097 struct temp_name *t;
5098 int suffix_length;
5099 const char *suffix = p;
5100 char *saved_suffix = NULL;
5102 while (*p == '.' || ISALNUM ((unsigned char) *p))
5103 p++;
5104 suffix_length = p - suffix;
5105 if (p[0] == '%' && p[1] == 'O')
5107 p += 2;
5108 /* We don't support extra suffix characters after %O. */
5109 if (*p == '.' || ISALNUM ((unsigned char) *p))
5110 fatal_error (input_location,
5111 "spec %qs has invalid %<%%0%c%>", spec, *p);
5112 if (suffix_length == 0)
5113 suffix = TARGET_OBJECT_SUFFIX;
5114 else
5116 saved_suffix
5117 = XNEWVEC (char, suffix_length
5118 + strlen (TARGET_OBJECT_SUFFIX) + 1);
5119 strncpy (saved_suffix, suffix, suffix_length);
5120 strcpy (saved_suffix + suffix_length,
5121 TARGET_OBJECT_SUFFIX);
5123 suffix_length += strlen (TARGET_OBJECT_SUFFIX);
5126 if (compare_debug < 0)
5128 suffix = concat (".gk", suffix, NULL);
5129 suffix_length += 3;
5132 /* If -save-temps=obj and -o were specified, use that for the
5133 temp file. */
5134 if (save_temps_length)
5136 char *tmp;
5137 temp_filename_length
5138 = save_temps_length + suffix_length + 1;
5139 tmp = (char *) alloca (temp_filename_length);
5140 memcpy (tmp, save_temps_prefix, save_temps_length);
5141 memcpy (tmp + save_temps_length, suffix, suffix_length);
5142 tmp[save_temps_length + suffix_length] = '\0';
5143 temp_filename = save_string (tmp, save_temps_length
5144 + suffix_length);
5145 obstack_grow (&obstack, temp_filename,
5146 temp_filename_length);
5147 arg_going = 1;
5148 delete_this_arg = 0;
5149 break;
5152 /* If the gcc_input_filename has the same suffix specified
5153 for the %g, %u, or %U, and -save-temps is specified,
5154 we could end up using that file as an intermediate
5155 thus clobbering the user's source file (.e.g.,
5156 gcc -save-temps foo.s would clobber foo.s with the
5157 output of cpp0). So check for this condition and
5158 generate a temp file as the intermediate. */
5160 if (save_temps_flag)
5162 char *tmp;
5163 temp_filename_length = basename_length + suffix_length + 1;
5164 tmp = (char *) alloca (temp_filename_length);
5165 memcpy (tmp, input_basename, basename_length);
5166 memcpy (tmp + basename_length, suffix, suffix_length);
5167 tmp[basename_length + suffix_length] = '\0';
5168 temp_filename = tmp;
5170 if (filename_cmp (temp_filename, gcc_input_filename) != 0)
5172 #ifndef HOST_LACKS_INODE_NUMBERS
5173 struct stat st_temp;
5175 /* Note, set_input() resets input_stat_set to 0. */
5176 if (input_stat_set == 0)
5178 input_stat_set = stat (gcc_input_filename,
5179 &input_stat);
5180 if (input_stat_set >= 0)
5181 input_stat_set = 1;
5184 /* If we have the stat for the gcc_input_filename
5185 and we can do the stat for the temp_filename
5186 then the they could still refer to the same
5187 file if st_dev/st_ino's are the same. */
5188 if (input_stat_set != 1
5189 || stat (temp_filename, &st_temp) < 0
5190 || input_stat.st_dev != st_temp.st_dev
5191 || input_stat.st_ino != st_temp.st_ino)
5192 #else
5193 /* Just compare canonical pathnames. */
5194 char* input_realname = lrealpath (gcc_input_filename);
5195 char* temp_realname = lrealpath (temp_filename);
5196 bool files_differ = filename_cmp (input_realname, temp_realname);
5197 free (input_realname);
5198 free (temp_realname);
5199 if (files_differ)
5200 #endif
5202 temp_filename = save_string (temp_filename,
5203 temp_filename_length + 1);
5204 obstack_grow (&obstack, temp_filename,
5205 temp_filename_length);
5206 arg_going = 1;
5207 delete_this_arg = 0;
5208 break;
5213 /* See if we already have an association of %g/%u/%U and
5214 suffix. */
5215 for (t = temp_names; t; t = t->next)
5216 if (t->length == suffix_length
5217 && strncmp (t->suffix, suffix, suffix_length) == 0
5218 && t->unique == (c == 'u' || c == 'U' || c == 'j'))
5219 break;
5221 /* Make a new association if needed. %u and %j
5222 require one. */
5223 if (t == 0 || c == 'u' || c == 'j')
5225 if (t == 0)
5227 t = XNEW (struct temp_name);
5228 t->next = temp_names;
5229 temp_names = t;
5231 t->length = suffix_length;
5232 if (saved_suffix)
5234 t->suffix = saved_suffix;
5235 saved_suffix = NULL;
5237 else
5238 t->suffix = save_string (suffix, suffix_length);
5239 t->unique = (c == 'u' || c == 'U' || c == 'j');
5240 temp_filename = make_temp_file (t->suffix);
5241 temp_filename_length = strlen (temp_filename);
5242 t->filename = temp_filename;
5243 t->filename_length = temp_filename_length;
5246 free (saved_suffix);
5248 obstack_grow (&obstack, t->filename, t->filename_length);
5249 delete_this_arg = 1;
5251 arg_going = 1;
5252 break;
5254 case 'i':
5255 if (combine_inputs)
5257 if (at_file_supplied)
5259 /* We are going to expand `%i' to `@FILE', where FILE
5260 is a newly-created temporary filename. The filenames
5261 that would usually be expanded in place of %o will be
5262 written to the temporary file. */
5263 char **argv;
5264 int n_files = 0;
5265 int j;
5267 for (i = 0; i < n_infiles; i++)
5268 if (compile_input_file_p (&infiles[i]))
5269 n_files++;
5271 argv = (char **) alloca (sizeof (char *) * (n_files + 1));
5273 /* Copy the strings over. */
5274 for (i = 0, j = 0; i < n_infiles; i++)
5275 if (compile_input_file_p (&infiles[i]))
5277 argv[j] = CONST_CAST (char *, infiles[i].name);
5278 infiles[i].compiled = true;
5279 j++;
5281 argv[j] = NULL;
5283 create_at_file (argv);
5285 else
5286 for (i = 0; (int) i < n_infiles; i++)
5287 if (compile_input_file_p (&infiles[i]))
5289 store_arg (infiles[i].name, 0, 0);
5290 infiles[i].compiled = true;
5293 else
5295 obstack_grow (&obstack, gcc_input_filename,
5296 input_filename_length);
5297 arg_going = 1;
5299 break;
5301 case 'I':
5303 struct spec_path_info info;
5305 if (multilib_dir)
5307 do_spec_1 ("-imultilib", 1, NULL);
5308 /* Make this a separate argument. */
5309 do_spec_1 (" ", 0, NULL);
5310 do_spec_1 (multilib_dir, 1, NULL);
5311 do_spec_1 (" ", 0, NULL);
5314 if (multiarch_dir)
5316 do_spec_1 ("-imultiarch", 1, NULL);
5317 /* Make this a separate argument. */
5318 do_spec_1 (" ", 0, NULL);
5319 do_spec_1 (multiarch_dir, 1, NULL);
5320 do_spec_1 (" ", 0, NULL);
5323 if (gcc_exec_prefix)
5325 do_spec_1 ("-iprefix", 1, NULL);
5326 /* Make this a separate argument. */
5327 do_spec_1 (" ", 0, NULL);
5328 do_spec_1 (gcc_exec_prefix, 1, NULL);
5329 do_spec_1 (" ", 0, NULL);
5332 if (target_system_root_changed ||
5333 (target_system_root && target_sysroot_hdrs_suffix))
5335 do_spec_1 ("-isysroot", 1, NULL);
5336 /* Make this a separate argument. */
5337 do_spec_1 (" ", 0, NULL);
5338 do_spec_1 (target_system_root, 1, NULL);
5339 if (target_sysroot_hdrs_suffix)
5340 do_spec_1 (target_sysroot_hdrs_suffix, 1, NULL);
5341 do_spec_1 (" ", 0, NULL);
5344 info.option = "-isystem";
5345 info.append = "include";
5346 info.append_len = strlen (info.append);
5347 info.omit_relative = false;
5348 info.separate_options = true;
5350 for_each_path (&include_prefixes, false, info.append_len,
5351 spec_path, &info);
5353 info.append = "include-fixed";
5354 if (*sysroot_hdrs_suffix_spec)
5355 info.append = concat (info.append, dir_separator_str,
5356 multilib_dir, NULL);
5357 info.append_len = strlen (info.append);
5358 for_each_path (&include_prefixes, false, info.append_len,
5359 spec_path, &info);
5361 break;
5363 case 'o':
5365 int max = n_infiles;
5366 max += lang_specific_extra_outfiles;
5368 if (HAVE_GNU_LD && at_file_supplied)
5370 /* We are going to expand `%o' to `@FILE', where FILE
5371 is a newly-created temporary filename. The filenames
5372 that would usually be expanded in place of %o will be
5373 written to the temporary file. */
5375 char **argv;
5376 int n_files, j;
5378 /* Convert OUTFILES into a form suitable for writeargv. */
5380 /* Determine how many are non-NULL. */
5381 for (n_files = 0, i = 0; i < max; i++)
5382 n_files += outfiles[i] != NULL;
5384 argv = (char **) alloca (sizeof (char *) * (n_files + 1));
5386 /* Copy the strings over. */
5387 for (i = 0, j = 0; i < max; i++)
5388 if (outfiles[i])
5390 argv[j] = CONST_CAST (char *, outfiles[i]);
5391 j++;
5393 argv[j] = NULL;
5395 create_at_file (argv);
5397 else
5398 for (i = 0; i < max; i++)
5399 if (outfiles[i])
5400 store_arg (outfiles[i], 0, 0);
5401 break;
5404 case 'O':
5405 obstack_grow (&obstack, TARGET_OBJECT_SUFFIX, strlen (TARGET_OBJECT_SUFFIX));
5406 arg_going = 1;
5407 break;
5409 case 's':
5410 this_is_library_file = 1;
5411 break;
5413 case 'T':
5414 this_is_linker_script = 1;
5415 break;
5417 case 'V':
5418 outfiles[input_file_number] = NULL;
5419 break;
5421 case 'w':
5422 this_is_output_file = 1;
5423 break;
5425 case 'W':
5427 unsigned int cur_index = argbuf.length ();
5428 /* Handle the {...} following the %W. */
5429 if (*p != '{')
5430 fatal_error (input_location,
5431 "spec %qs has invalid %<%%W%c%>", spec, *p);
5432 p = handle_braces (p + 1);
5433 if (p == 0)
5434 return -1;
5435 end_going_arg ();
5436 /* If any args were output, mark the last one for deletion
5437 on failure. */
5438 if (argbuf.length () != cur_index)
5439 record_temp_file (argbuf.last (), 0, 1);
5440 break;
5443 /* %x{OPTION} records OPTION for %X to output. */
5444 case 'x':
5446 const char *p1 = p;
5447 char *string;
5448 char *opt;
5449 unsigned ix;
5451 /* Skip past the option value and make a copy. */
5452 if (*p != '{')
5453 fatal_error (input_location,
5454 "spec %qs has invalid %<%%x%c%>", spec, *p);
5455 while (*p++ != '}')
5457 string = save_string (p1 + 1, p - p1 - 2);
5459 /* See if we already recorded this option. */
5460 FOR_EACH_VEC_ELT (linker_options, ix, opt)
5461 if (! strcmp (string, opt))
5463 free (string);
5464 return 0;
5467 /* This option is new; add it. */
5468 add_linker_option (string, strlen (string));
5469 free (string);
5471 break;
5473 /* Dump out the options accumulated previously using %x. */
5474 case 'X':
5475 do_specs_vec (linker_options);
5476 break;
5478 /* Dump out the options accumulated previously using -Wa,. */
5479 case 'Y':
5480 do_specs_vec (assembler_options);
5481 break;
5483 /* Dump out the options accumulated previously using -Wp,. */
5484 case 'Z':
5485 do_specs_vec (preprocessor_options);
5486 break;
5488 /* Here are digits and numbers that just process
5489 a certain constant string as a spec. */
5491 case '1':
5492 value = do_spec_1 (cc1_spec, 0, NULL);
5493 if (value != 0)
5494 return value;
5495 break;
5497 case '2':
5498 value = do_spec_1 (cc1plus_spec, 0, NULL);
5499 if (value != 0)
5500 return value;
5501 break;
5503 case 'a':
5504 value = do_spec_1 (asm_spec, 0, NULL);
5505 if (value != 0)
5506 return value;
5507 break;
5509 case 'A':
5510 value = do_spec_1 (asm_final_spec, 0, NULL);
5511 if (value != 0)
5512 return value;
5513 break;
5515 case 'C':
5517 const char *const spec
5518 = (input_file_compiler->cpp_spec
5519 ? input_file_compiler->cpp_spec
5520 : cpp_spec);
5521 value = do_spec_1 (spec, 0, NULL);
5522 if (value != 0)
5523 return value;
5525 break;
5527 case 'E':
5528 value = do_spec_1 (endfile_spec, 0, NULL);
5529 if (value != 0)
5530 return value;
5531 break;
5533 case 'l':
5534 value = do_spec_1 (link_spec, 0, NULL);
5535 if (value != 0)
5536 return value;
5537 break;
5539 case 'L':
5540 value = do_spec_1 (lib_spec, 0, NULL);
5541 if (value != 0)
5542 return value;
5543 break;
5545 case 'M':
5546 if (multilib_os_dir == NULL)
5547 obstack_1grow (&obstack, '.');
5548 else
5549 obstack_grow (&obstack, multilib_os_dir,
5550 strlen (multilib_os_dir));
5551 break;
5553 case 'G':
5554 value = do_spec_1 (libgcc_spec, 0, NULL);
5555 if (value != 0)
5556 return value;
5557 break;
5559 case 'R':
5560 /* We assume there is a directory
5561 separator at the end of this string. */
5562 if (target_system_root)
5564 obstack_grow (&obstack, target_system_root,
5565 strlen (target_system_root));
5566 if (target_sysroot_suffix)
5567 obstack_grow (&obstack, target_sysroot_suffix,
5568 strlen (target_sysroot_suffix));
5570 break;
5572 case 'S':
5573 value = do_spec_1 (startfile_spec, 0, NULL);
5574 if (value != 0)
5575 return value;
5576 break;
5578 /* Here we define characters other than letters and digits. */
5580 case '{':
5581 p = handle_braces (p);
5582 if (p == 0)
5583 return -1;
5584 break;
5586 case ':':
5587 p = handle_spec_function (p, NULL);
5588 if (p == 0)
5589 return -1;
5590 break;
5592 case '%':
5593 obstack_1grow (&obstack, '%');
5594 break;
5596 case '.':
5598 unsigned len = 0;
5600 while (p[len] && p[len] != ' ' && p[len] != '%')
5601 len++;
5602 suffix_subst = save_string (p - 1, len + 1);
5603 p += len;
5605 break;
5607 /* Henceforth ignore the option(s) matching the pattern
5608 after the %<. */
5609 case '<':
5610 case '>':
5612 unsigned len = 0;
5613 int have_wildcard = 0;
5614 int i;
5615 int switch_option;
5617 if (c == '>')
5618 switch_option = SWITCH_IGNORE | SWITCH_KEEP_FOR_GCC;
5619 else
5620 switch_option = SWITCH_IGNORE;
5622 while (p[len] && p[len] != ' ' && p[len] != '\t')
5623 len++;
5625 if (p[len-1] == '*')
5626 have_wildcard = 1;
5628 for (i = 0; i < n_switches; i++)
5629 if (!strncmp (switches[i].part1, p, len - have_wildcard)
5630 && (have_wildcard || switches[i].part1[len] == '\0'))
5632 switches[i].live_cond |= switch_option;
5633 /* User switch be validated from validate_all_switches.
5634 when the definition is seen from the spec file.
5635 If not defined anywhere, will be rejected. */
5636 if (switches[i].known)
5637 switches[i].validated = true;
5640 p += len;
5642 break;
5644 case '*':
5645 if (soft_matched_part)
5647 if (soft_matched_part[0])
5648 do_spec_1 (soft_matched_part, 1, NULL);
5649 /* Only insert a space after the substitution if it is at the
5650 end of the current sequence. So if:
5652 "%{foo=*:bar%*}%{foo=*:one%*two}"
5654 matches -foo=hello then it will produce:
5656 barhello onehellotwo
5658 if (*p == 0 || *p == '}')
5659 do_spec_1 (" ", 0, NULL);
5661 else
5662 /* Catch the case where a spec string contains something like
5663 '%{foo:%*}'. i.e. there is no * in the pattern on the left
5664 hand side of the :. */
5665 error ("spec failure: %<%%*%> has not been initialized by pattern match");
5666 break;
5668 /* Process a string found as the value of a spec given by name.
5669 This feature allows individual machine descriptions
5670 to add and use their own specs. */
5671 case '(':
5673 const char *name = p;
5674 struct spec_list *sl;
5675 int len;
5677 /* The string after the S/P is the name of a spec that is to be
5678 processed. */
5679 while (*p && *p != ')')
5680 p++;
5682 /* See if it's in the list. */
5683 for (len = p - name, sl = specs; sl; sl = sl->next)
5684 if (sl->name_len == len && !strncmp (sl->name, name, len))
5686 name = *(sl->ptr_spec);
5687 #ifdef DEBUG_SPECS
5688 fnotice (stderr, "Processing spec (%s), which is '%s'\n",
5689 sl->name, name);
5690 #endif
5691 break;
5694 if (sl)
5696 value = do_spec_1 (name, 0, NULL);
5697 if (value != 0)
5698 return value;
5701 /* Discard the closing paren. */
5702 if (*p)
5703 p++;
5705 break;
5707 default:
5708 error ("spec failure: unrecognized spec option %qc", c);
5709 break;
5711 break;
5713 case '\\':
5714 /* Backslash: treat next character as ordinary. */
5715 c = *p++;
5717 /* Fall through. */
5718 default:
5719 /* Ordinary character: put it into the current argument. */
5720 obstack_1grow (&obstack, c);
5721 arg_going = 1;
5724 /* End of string. If we are processing a spec function, we need to
5725 end any pending argument. */
5726 if (processing_spec_function)
5727 end_going_arg ();
5729 return 0;
5732 /* Look up a spec function. */
5734 static const struct spec_function *
5735 lookup_spec_function (const char *name)
5737 const struct spec_function *sf;
5739 for (sf = static_spec_functions; sf->name != NULL; sf++)
5740 if (strcmp (sf->name, name) == 0)
5741 return sf;
5743 return NULL;
5746 /* Evaluate a spec function. */
5748 static const char *
5749 eval_spec_function (const char *func, const char *args)
5751 const struct spec_function *sf;
5752 const char *funcval;
5754 /* Saved spec processing context. */
5755 vec<const_char_p> save_argbuf;
5757 int save_arg_going;
5758 int save_delete_this_arg;
5759 int save_this_is_output_file;
5760 int save_this_is_library_file;
5761 int save_input_from_pipe;
5762 int save_this_is_linker_script;
5763 const char *save_suffix_subst;
5765 int save_growing_size;
5766 void *save_growing_value = NULL;
5768 sf = lookup_spec_function (func);
5769 if (sf == NULL)
5770 fatal_error (input_location, "unknown spec function %qs", func);
5772 /* Push the spec processing context. */
5773 save_argbuf = argbuf;
5775 save_arg_going = arg_going;
5776 save_delete_this_arg = delete_this_arg;
5777 save_this_is_output_file = this_is_output_file;
5778 save_this_is_library_file = this_is_library_file;
5779 save_this_is_linker_script = this_is_linker_script;
5780 save_input_from_pipe = input_from_pipe;
5781 save_suffix_subst = suffix_subst;
5783 /* If we have some object growing now, finalize it so the args and function
5784 eval proceed from a cleared context. This is needed to prevent the first
5785 constructed arg from mistakenly including the growing value. We'll push
5786 this value back on the obstack once the function evaluation is done, to
5787 restore a consistent processing context for our caller. This is fine as
5788 the address of growing objects isn't guaranteed to remain stable until
5789 they are finalized, and we expect this situation to be rare enough for
5790 the extra copy not to be an issue. */
5791 save_growing_size = obstack_object_size (&obstack);
5792 if (save_growing_size > 0)
5793 save_growing_value = obstack_finish (&obstack);
5795 /* Create a new spec processing context, and build the function
5796 arguments. */
5798 alloc_args ();
5799 if (do_spec_2 (args) < 0)
5800 fatal_error (input_location, "error in args to spec function %qs", func);
5802 /* argbuf_index is an index for the next argument to be inserted, and
5803 so contains the count of the args already inserted. */
5805 funcval = (*sf->func) (argbuf.length (),
5806 argbuf.address ());
5808 /* Pop the spec processing context. */
5809 argbuf.release ();
5810 argbuf = save_argbuf;
5812 arg_going = save_arg_going;
5813 delete_this_arg = save_delete_this_arg;
5814 this_is_output_file = save_this_is_output_file;
5815 this_is_library_file = save_this_is_library_file;
5816 this_is_linker_script = save_this_is_linker_script;
5817 input_from_pipe = save_input_from_pipe;
5818 suffix_subst = save_suffix_subst;
5820 if (save_growing_size > 0)
5821 obstack_grow (&obstack, save_growing_value, save_growing_size);
5823 return funcval;
5826 /* Handle a spec function call of the form:
5828 %:function(args)
5830 ARGS is processed as a spec in a separate context and split into an
5831 argument vector in the normal fashion. The function returns a string
5832 containing a spec which we then process in the caller's context, or
5833 NULL if no processing is required.
5835 If RETVAL_NONNULL is not NULL, then store a bool whether function
5836 returned non-NULL. */
5838 static const char *
5839 handle_spec_function (const char *p, bool *retval_nonnull)
5841 char *func, *args;
5842 const char *endp, *funcval;
5843 int count;
5845 processing_spec_function++;
5847 /* Get the function name. */
5848 for (endp = p; *endp != '\0'; endp++)
5850 if (*endp == '(') /* ) */
5851 break;
5852 /* Only allow [A-Za-z0-9], -, and _ in function names. */
5853 if (!ISALNUM (*endp) && !(*endp == '-' || *endp == '_'))
5854 fatal_error (input_location, "malformed spec function name");
5856 if (*endp != '(') /* ) */
5857 fatal_error (input_location, "no arguments for spec function");
5858 func = save_string (p, endp - p);
5859 p = ++endp;
5861 /* Get the arguments. */
5862 for (count = 0; *endp != '\0'; endp++)
5864 /* ( */
5865 if (*endp == ')')
5867 if (count == 0)
5868 break;
5869 count--;
5871 else if (*endp == '(') /* ) */
5872 count++;
5874 /* ( */
5875 if (*endp != ')')
5876 fatal_error (input_location, "malformed spec function arguments");
5877 args = save_string (p, endp - p);
5878 p = ++endp;
5880 /* p now points to just past the end of the spec function expression. */
5882 funcval = eval_spec_function (func, args);
5883 if (funcval != NULL && do_spec_1 (funcval, 0, NULL) < 0)
5884 p = NULL;
5885 if (retval_nonnull)
5886 *retval_nonnull = funcval != NULL;
5888 free (func);
5889 free (args);
5891 processing_spec_function--;
5893 return p;
5896 /* Inline subroutine of handle_braces. Returns true if the current
5897 input suffix matches the atom bracketed by ATOM and END_ATOM. */
5898 static inline bool
5899 input_suffix_matches (const char *atom, const char *end_atom)
5901 return (input_suffix
5902 && !strncmp (input_suffix, atom, end_atom - atom)
5903 && input_suffix[end_atom - atom] == '\0');
5906 /* Subroutine of handle_braces. Returns true if the current
5907 input file's spec name matches the atom bracketed by ATOM and END_ATOM. */
5908 static bool
5909 input_spec_matches (const char *atom, const char *end_atom)
5911 return (input_file_compiler
5912 && input_file_compiler->suffix
5913 && input_file_compiler->suffix[0] != '\0'
5914 && !strncmp (input_file_compiler->suffix + 1, atom,
5915 end_atom - atom)
5916 && input_file_compiler->suffix[end_atom - atom + 1] == '\0');
5919 /* Subroutine of handle_braces. Returns true if a switch
5920 matching the atom bracketed by ATOM and END_ATOM appeared on the
5921 command line. */
5922 static bool
5923 switch_matches (const char *atom, const char *end_atom, int starred)
5925 int i;
5926 int len = end_atom - atom;
5927 int plen = starred ? len : -1;
5929 for (i = 0; i < n_switches; i++)
5930 if (!strncmp (switches[i].part1, atom, len)
5931 && (starred || switches[i].part1[len] == '\0')
5932 && check_live_switch (i, plen))
5933 return true;
5935 /* Check if a switch with separated form matching the atom.
5936 We check -D and -U switches. */
5937 else if (switches[i].args != 0)
5939 if ((*switches[i].part1 == 'D' || *switches[i].part1 == 'U')
5940 && *switches[i].part1 == atom[0])
5942 if (!strncmp (switches[i].args[0], &atom[1], len - 1)
5943 && (starred || (switches[i].part1[1] == '\0'
5944 && switches[i].args[0][len - 1] == '\0'))
5945 && check_live_switch (i, (starred ? 1 : -1)))
5946 return true;
5950 return false;
5953 /* Inline subroutine of handle_braces. Mark all of the switches which
5954 match ATOM (extends to END_ATOM; STARRED indicates whether there
5955 was a star after the atom) for later processing. */
5956 static inline void
5957 mark_matching_switches (const char *atom, const char *end_atom, int starred)
5959 int i;
5960 int len = end_atom - atom;
5961 int plen = starred ? len : -1;
5963 for (i = 0; i < n_switches; i++)
5964 if (!strncmp (switches[i].part1, atom, len)
5965 && (starred || switches[i].part1[len] == '\0')
5966 && check_live_switch (i, plen))
5967 switches[i].ordering = 1;
5970 /* Inline subroutine of handle_braces. Process all the currently
5971 marked switches through give_switch, and clear the marks. */
5972 static inline void
5973 process_marked_switches (void)
5975 int i;
5977 for (i = 0; i < n_switches; i++)
5978 if (switches[i].ordering == 1)
5980 switches[i].ordering = 0;
5981 give_switch (i, 0);
5985 /* Handle a %{ ... } construct. P points just inside the leading {.
5986 Returns a pointer one past the end of the brace block, or 0
5987 if we call do_spec_1 and that returns -1. */
5989 static const char *
5990 handle_braces (const char *p)
5992 const char *atom, *end_atom;
5993 const char *d_atom = NULL, *d_end_atom = NULL;
5994 const char *orig = p;
5996 bool a_is_suffix;
5997 bool a_is_spectype;
5998 bool a_is_starred;
5999 bool a_is_negated;
6000 bool a_matched;
6002 bool a_must_be_last = false;
6003 bool ordered_set = false;
6004 bool disjunct_set = false;
6005 bool disj_matched = false;
6006 bool disj_starred = true;
6007 bool n_way_choice = false;
6008 bool n_way_matched = false;
6010 #define SKIP_WHITE() do { while (*p == ' ' || *p == '\t') p++; } while (0)
6014 if (a_must_be_last)
6015 goto invalid;
6017 /* Scan one "atom" (S in the description above of %{}, possibly
6018 with '!', '.', '@', ',', or '*' modifiers). */
6019 a_matched = false;
6020 a_is_suffix = false;
6021 a_is_starred = false;
6022 a_is_negated = false;
6023 a_is_spectype = false;
6025 SKIP_WHITE ();
6026 if (*p == '!')
6027 p++, a_is_negated = true;
6029 SKIP_WHITE ();
6030 if (*p == '%' && p[1] == ':')
6032 atom = NULL;
6033 end_atom = NULL;
6034 p = handle_spec_function (p + 2, &a_matched);
6036 else
6038 if (*p == '.')
6039 p++, a_is_suffix = true;
6040 else if (*p == ',')
6041 p++, a_is_spectype = true;
6043 atom = p;
6044 while (ISIDNUM (*p) || *p == '-' || *p == '+' || *p == '='
6045 || *p == ',' || *p == '.' || *p == '@')
6046 p++;
6047 end_atom = p;
6049 if (*p == '*')
6050 p++, a_is_starred = 1;
6053 SKIP_WHITE ();
6054 switch (*p)
6056 case '&': case '}':
6057 /* Substitute the switch(es) indicated by the current atom. */
6058 ordered_set = true;
6059 if (disjunct_set || n_way_choice || a_is_negated || a_is_suffix
6060 || a_is_spectype || atom == end_atom)
6061 goto invalid;
6063 mark_matching_switches (atom, end_atom, a_is_starred);
6065 if (*p == '}')
6066 process_marked_switches ();
6067 break;
6069 case '|': case ':':
6070 /* Substitute some text if the current atom appears as a switch
6071 or suffix. */
6072 disjunct_set = true;
6073 if (ordered_set)
6074 goto invalid;
6076 if (atom && atom == end_atom)
6078 if (!n_way_choice || disj_matched || *p == '|'
6079 || a_is_negated || a_is_suffix || a_is_spectype
6080 || a_is_starred)
6081 goto invalid;
6083 /* An empty term may appear as the last choice of an
6084 N-way choice set; it means "otherwise". */
6085 a_must_be_last = true;
6086 disj_matched = !n_way_matched;
6087 disj_starred = false;
6089 else
6091 if ((a_is_suffix || a_is_spectype) && a_is_starred)
6092 goto invalid;
6094 if (!a_is_starred)
6095 disj_starred = false;
6097 /* Don't bother testing this atom if we already have a
6098 match. */
6099 if (!disj_matched && !n_way_matched)
6101 if (atom == NULL)
6102 /* a_matched is already set by handle_spec_function. */;
6103 else if (a_is_suffix)
6104 a_matched = input_suffix_matches (atom, end_atom);
6105 else if (a_is_spectype)
6106 a_matched = input_spec_matches (atom, end_atom);
6107 else
6108 a_matched = switch_matches (atom, end_atom, a_is_starred);
6110 if (a_matched != a_is_negated)
6112 disj_matched = true;
6113 d_atom = atom;
6114 d_end_atom = end_atom;
6119 if (*p == ':')
6121 /* Found the body, that is, the text to substitute if the
6122 current disjunction matches. */
6123 p = process_brace_body (p + 1, d_atom, d_end_atom, disj_starred,
6124 disj_matched && !n_way_matched);
6125 if (p == 0)
6126 return 0;
6128 /* If we have an N-way choice, reset state for the next
6129 disjunction. */
6130 if (*p == ';')
6132 n_way_choice = true;
6133 n_way_matched |= disj_matched;
6134 disj_matched = false;
6135 disj_starred = true;
6136 d_atom = d_end_atom = NULL;
6139 break;
6141 default:
6142 goto invalid;
6145 while (*p++ != '}');
6147 return p;
6149 invalid:
6150 fatal_error (input_location, "braced spec %qs is invalid at %qc", orig, *p);
6152 #undef SKIP_WHITE
6155 /* Subroutine of handle_braces. Scan and process a brace substitution body
6156 (X in the description of %{} syntax). P points one past the colon;
6157 ATOM and END_ATOM bracket the first atom which was found to be true
6158 (present) in the current disjunction; STARRED indicates whether all
6159 the atoms in the current disjunction were starred (for syntax validation);
6160 MATCHED indicates whether the disjunction matched or not, and therefore
6161 whether or not the body is to be processed through do_spec_1 or just
6162 skipped. Returns a pointer to the closing } or ;, or 0 if do_spec_1
6163 returns -1. */
6165 static const char *
6166 process_brace_body (const char *p, const char *atom, const char *end_atom,
6167 int starred, int matched)
6169 const char *body, *end_body;
6170 unsigned int nesting_level;
6171 bool have_subst = false;
6173 /* Locate the closing } or ;, honoring nested braces.
6174 Trim trailing whitespace. */
6175 body = p;
6176 nesting_level = 1;
6177 for (;;)
6179 if (*p == '{')
6180 nesting_level++;
6181 else if (*p == '}')
6183 if (!--nesting_level)
6184 break;
6186 else if (*p == ';' && nesting_level == 1)
6187 break;
6188 else if (*p == '%' && p[1] == '*' && nesting_level == 1)
6189 have_subst = true;
6190 else if (*p == '\0')
6191 goto invalid;
6192 p++;
6195 end_body = p;
6196 while (end_body[-1] == ' ' || end_body[-1] == '\t')
6197 end_body--;
6199 if (have_subst && !starred)
6200 goto invalid;
6202 if (matched)
6204 /* Copy the substitution body to permanent storage and execute it.
6205 If have_subst is false, this is a simple matter of running the
6206 body through do_spec_1... */
6207 char *string = save_string (body, end_body - body);
6208 if (!have_subst)
6210 if (do_spec_1 (string, 0, NULL) < 0)
6211 return 0;
6213 else
6215 /* ... but if have_subst is true, we have to process the
6216 body once for each matching switch, with %* set to the
6217 variant part of the switch. */
6218 unsigned int hard_match_len = end_atom - atom;
6219 int i;
6221 for (i = 0; i < n_switches; i++)
6222 if (!strncmp (switches[i].part1, atom, hard_match_len)
6223 && check_live_switch (i, hard_match_len))
6225 if (do_spec_1 (string, 0,
6226 &switches[i].part1[hard_match_len]) < 0)
6227 return 0;
6228 /* Pass any arguments this switch has. */
6229 give_switch (i, 1);
6230 suffix_subst = NULL;
6235 return p;
6237 invalid:
6238 fatal_error (input_location, "braced spec body %qs is invalid", body);
6241 /* Return 0 iff switch number SWITCHNUM is obsoleted by a later switch
6242 on the command line. PREFIX_LENGTH is the length of XXX in an {XXX*}
6243 spec, or -1 if either exact match or %* is used.
6245 A -O switch is obsoleted by a later -O switch. A -f, -g, -m, or -W switch
6246 whose value does not begin with "no-" is obsoleted by the same value
6247 with the "no-", similarly for a switch with the "no-" prefix. */
6249 static int
6250 check_live_switch (int switchnum, int prefix_length)
6252 const char *name = switches[switchnum].part1;
6253 int i;
6255 /* If we already processed this switch and determined if it was
6256 live or not, return our past determination. */
6257 if (switches[switchnum].live_cond != 0)
6258 return ((switches[switchnum].live_cond & SWITCH_LIVE) != 0
6259 && (switches[switchnum].live_cond & SWITCH_FALSE) == 0
6260 && (switches[switchnum].live_cond & SWITCH_IGNORE_PERMANENTLY)
6261 == 0);
6263 /* In the common case of {<at-most-one-letter>*}, a negating
6264 switch would always match, so ignore that case. We will just
6265 send the conflicting switches to the compiler phase. */
6266 if (prefix_length >= 0 && prefix_length <= 1)
6267 return 1;
6269 /* Now search for duplicate in a manner that depends on the name. */
6270 switch (*name)
6272 case 'O':
6273 for (i = switchnum + 1; i < n_switches; i++)
6274 if (switches[i].part1[0] == 'O')
6276 switches[switchnum].validated = true;
6277 switches[switchnum].live_cond = SWITCH_FALSE;
6278 return 0;
6280 break;
6282 case 'W': case 'f': case 'm': case 'g':
6283 if (! strncmp (name + 1, "no-", 3))
6285 /* We have Xno-YYY, search for XYYY. */
6286 for (i = switchnum + 1; i < n_switches; i++)
6287 if (switches[i].part1[0] == name[0]
6288 && ! strcmp (&switches[i].part1[1], &name[4]))
6290 /* --specs are validated with the validate_switches mechanism. */
6291 if (switches[switchnum].known)
6292 switches[switchnum].validated = true;
6293 switches[switchnum].live_cond = SWITCH_FALSE;
6294 return 0;
6297 else
6299 /* We have XYYY, search for Xno-YYY. */
6300 for (i = switchnum + 1; i < n_switches; i++)
6301 if (switches[i].part1[0] == name[0]
6302 && switches[i].part1[1] == 'n'
6303 && switches[i].part1[2] == 'o'
6304 && switches[i].part1[3] == '-'
6305 && !strcmp (&switches[i].part1[4], &name[1]))
6307 /* --specs are validated with the validate_switches mechanism. */
6308 if (switches[switchnum].known)
6309 switches[switchnum].validated = true;
6310 switches[switchnum].live_cond = SWITCH_FALSE;
6311 return 0;
6314 break;
6317 /* Otherwise the switch is live. */
6318 switches[switchnum].live_cond |= SWITCH_LIVE;
6319 return 1;
6322 /* Pass a switch to the current accumulating command
6323 in the same form that we received it.
6324 SWITCHNUM identifies the switch; it is an index into
6325 the vector of switches gcc received, which is `switches'.
6326 This cannot fail since it never finishes a command line.
6328 If OMIT_FIRST_WORD is nonzero, then we omit .part1 of the argument. */
6330 static void
6331 give_switch (int switchnum, int omit_first_word)
6333 if ((switches[switchnum].live_cond & SWITCH_IGNORE) != 0)
6334 return;
6336 if (!omit_first_word)
6338 do_spec_1 ("-", 0, NULL);
6339 do_spec_1 (switches[switchnum].part1, 1, NULL);
6342 if (switches[switchnum].args != 0)
6344 const char **p;
6345 for (p = switches[switchnum].args; *p; p++)
6347 const char *arg = *p;
6349 do_spec_1 (" ", 0, NULL);
6350 if (suffix_subst)
6352 unsigned length = strlen (arg);
6353 int dot = 0;
6355 while (length-- && !IS_DIR_SEPARATOR (arg[length]))
6356 if (arg[length] == '.')
6358 (CONST_CAST (char *, arg))[length] = 0;
6359 dot = 1;
6360 break;
6362 do_spec_1 (arg, 1, NULL);
6363 if (dot)
6364 (CONST_CAST (char *, arg))[length] = '.';
6365 do_spec_1 (suffix_subst, 1, NULL);
6367 else
6368 do_spec_1 (arg, 1, NULL);
6372 do_spec_1 (" ", 0, NULL);
6373 switches[switchnum].validated = true;
6376 /* Print GCC configuration (e.g. version, thread model, target,
6377 configuration_arguments) to a given FILE. */
6379 static void
6380 print_configuration (FILE *file)
6382 int n;
6383 const char *thrmod;
6385 fnotice (file, "Target: %s\n", spec_machine);
6386 fnotice (file, "Configured with: %s\n", configuration_arguments);
6388 #ifdef THREAD_MODEL_SPEC
6389 /* We could have defined THREAD_MODEL_SPEC to "%*" by default,
6390 but there's no point in doing all this processing just to get
6391 thread_model back. */
6392 obstack_init (&obstack);
6393 do_spec_1 (THREAD_MODEL_SPEC, 0, thread_model);
6394 obstack_1grow (&obstack, '\0');
6395 thrmod = XOBFINISH (&obstack, const char *);
6396 #else
6397 thrmod = thread_model;
6398 #endif
6400 fnotice (file, "Thread model: %s\n", thrmod);
6402 /* compiler_version is truncated at the first space when initialized
6403 from version string, so truncate version_string at the first space
6404 before comparing. */
6405 for (n = 0; version_string[n]; n++)
6406 if (version_string[n] == ' ')
6407 break;
6409 if (! strncmp (version_string, compiler_version, n)
6410 && compiler_version[n] == 0)
6411 fnotice (file, "gcc version %s %s\n", version_string,
6412 pkgversion_string);
6413 else
6414 fnotice (file, "gcc driver version %s %sexecuting gcc version %s\n",
6415 version_string, pkgversion_string, compiler_version);
6419 #define RETRY_ICE_ATTEMPTS 3
6421 /* Returns true if FILE1 and FILE2 contain equivalent data, 0 otherwise. */
6423 static bool
6424 files_equal_p (char *file1, char *file2)
6426 struct stat st1, st2;
6427 off_t n, len;
6428 int fd1, fd2;
6429 const int bufsize = 8192;
6430 char *buf = XNEWVEC (char, bufsize);
6432 fd1 = open (file1, O_RDONLY);
6433 fd2 = open (file2, O_RDONLY);
6435 if (fd1 < 0 || fd2 < 0)
6436 goto error;
6438 if (fstat (fd1, &st1) < 0 || fstat (fd2, &st2) < 0)
6439 goto error;
6441 if (st1.st_size != st2.st_size)
6442 goto error;
6444 for (n = st1.st_size; n; n -= len)
6446 len = n;
6447 if ((int) len > bufsize / 2)
6448 len = bufsize / 2;
6450 if (read (fd1, buf, len) != (int) len
6451 || read (fd2, buf + bufsize / 2, len) != (int) len)
6453 goto error;
6456 if (memcmp (buf, buf + bufsize / 2, len) != 0)
6457 goto error;
6460 free (buf);
6461 close (fd1);
6462 close (fd2);
6464 return 1;
6466 error:
6467 free (buf);
6468 close (fd1);
6469 close (fd2);
6470 return 0;
6473 /* Check that compiler's output doesn't differ across runs.
6474 TEMP_STDOUT_FILES and TEMP_STDERR_FILES are arrays of files, containing
6475 stdout and stderr for each compiler run. Return true if all of
6476 TEMP_STDOUT_FILES and TEMP_STDERR_FILES are equivalent. */
6478 static bool
6479 check_repro (char **temp_stdout_files, char **temp_stderr_files)
6481 int i;
6482 for (i = 0; i < RETRY_ICE_ATTEMPTS - 2; ++i)
6484 if (!files_equal_p (temp_stdout_files[i], temp_stdout_files[i + 1])
6485 || !files_equal_p (temp_stderr_files[i], temp_stderr_files[i + 1]))
6487 fnotice (stderr, "The bug is not reproducible, so it is"
6488 " likely a hardware or OS problem.\n");
6489 break;
6492 return i == RETRY_ICE_ATTEMPTS - 2;
6495 enum attempt_status {
6496 ATTEMPT_STATUS_FAIL_TO_RUN,
6497 ATTEMPT_STATUS_SUCCESS,
6498 ATTEMPT_STATUS_ICE
6502 /* Run compiler with arguments NEW_ARGV to reproduce the ICE, storing stdout
6503 to OUT_TEMP and stderr to ERR_TEMP. If APPEND is TRUE, append to OUT_TEMP
6504 and ERR_TEMP instead of truncating. If EMIT_SYSTEM_INFO is TRUE, also write
6505 GCC configuration into to ERR_TEMP. Return ATTEMPT_STATUS_FAIL_TO_RUN if
6506 compiler failed to run, ATTEMPT_STATUS_ICE if compiled ICE-ed and
6507 ATTEMPT_STATUS_SUCCESS otherwise. */
6509 static enum attempt_status
6510 run_attempt (const char **new_argv, const char *out_temp,
6511 const char *err_temp, int emit_system_info, int append)
6514 if (emit_system_info)
6516 FILE *file_out = fopen (err_temp, "a");
6517 print_configuration (file_out);
6518 fputs ("\n", file_out);
6519 fclose (file_out);
6522 int exit_status;
6523 const char *errmsg;
6524 struct pex_obj *pex;
6525 int err;
6526 int pex_flags = PEX_USE_PIPES | PEX_LAST;
6527 enum attempt_status status = ATTEMPT_STATUS_FAIL_TO_RUN;
6529 if (append)
6530 pex_flags |= PEX_STDOUT_APPEND | PEX_STDERR_APPEND;
6532 pex = pex_init (PEX_USE_PIPES, new_argv[0], NULL);
6533 if (!pex)
6534 fatal_error (input_location, "pex_init failed: %m");
6536 errmsg = pex_run (pex, pex_flags, new_argv[0],
6537 CONST_CAST2 (char *const *, const char **, &new_argv[1]), out_temp,
6538 err_temp, &err);
6539 if (errmsg != NULL)
6541 if (err == 0)
6542 fatal_error (input_location, errmsg);
6543 else
6545 errno = err;
6546 pfatal_with_name (errmsg);
6550 if (!pex_get_status (pex, 1, &exit_status))
6551 goto out;
6553 switch (WEXITSTATUS (exit_status))
6555 case ICE_EXIT_CODE:
6556 status = ATTEMPT_STATUS_ICE;
6557 break;
6559 case SUCCESS_EXIT_CODE:
6560 status = ATTEMPT_STATUS_SUCCESS;
6561 break;
6563 default:
6567 out:
6568 pex_free (pex);
6569 return status;
6572 /* This routine reads lines from IN file, adds C++ style comments
6573 at the begining of each line and writes result into OUT. */
6575 static void
6576 insert_comments (const char *file_in, const char *file_out)
6578 FILE *in = fopen (file_in, "rb");
6579 FILE *out = fopen (file_out, "wb");
6580 char line[256];
6582 bool add_comment = true;
6583 while (fgets (line, sizeof (line), in))
6585 if (add_comment)
6586 fputs ("// ", out);
6587 fputs (line, out);
6588 add_comment = strchr (line, '\n') != NULL;
6591 fclose (in);
6592 fclose (out);
6595 /* This routine adds preprocessed source code into the given ERR_FILE.
6596 To do this, it adds "-E" to NEW_ARGV and execute RUN_ATTEMPT routine to
6597 add information in report file. RUN_ATTEMPT should return
6598 ATTEMPT_STATUS_SUCCESS, in other case we cannot generate the report. */
6600 static void
6601 do_report_bug (const char **new_argv, const int nargs,
6602 char **out_file, char **err_file)
6604 int i, status;
6605 int fd = open (*out_file, O_RDWR | O_APPEND);
6606 if (fd < 0)
6607 return;
6608 write (fd, "\n//", 3);
6609 for (i = 0; i < nargs; i++)
6611 write (fd, " ", 1);
6612 write (fd, new_argv[i], strlen (new_argv[i]));
6614 write (fd, "\n\n", 2);
6615 close (fd);
6616 new_argv[nargs] = "-E";
6617 new_argv[nargs + 1] = NULL;
6619 status = run_attempt (new_argv, *out_file, *err_file, 0, 1);
6621 if (status == ATTEMPT_STATUS_SUCCESS)
6623 fnotice (stderr, "Preprocessed source stored into %s file,"
6624 " please attach this to your bugreport.\n", *out_file);
6625 /* Make sure it is not deleted. */
6626 free (*out_file);
6627 *out_file = NULL;
6631 /* Try to reproduce ICE. If bug is reproducible, generate report .err file
6632 containing GCC configuration, backtrace, compiler's command line options
6633 and preprocessed source code. */
6635 static void
6636 try_generate_repro (const char **argv)
6638 int i, nargs, out_arg = -1, quiet = 0, attempt;
6639 const char **new_argv;
6640 char *temp_files[RETRY_ICE_ATTEMPTS * 2];
6641 char **temp_stdout_files = &temp_files[0];
6642 char **temp_stderr_files = &temp_files[RETRY_ICE_ATTEMPTS];
6644 if (gcc_input_filename == NULL || ! strcmp (gcc_input_filename, "-"))
6645 return;
6647 for (nargs = 0; argv[nargs] != NULL; ++nargs)
6648 /* Only retry compiler ICEs, not preprocessor ones. */
6649 if (! strcmp (argv[nargs], "-E"))
6650 return;
6651 else if (argv[nargs][0] == '-' && argv[nargs][1] == 'o')
6653 if (out_arg == -1)
6654 out_arg = nargs;
6655 else
6656 return;
6658 /* If the compiler is going to output any time information,
6659 it might varry between invocations. */
6660 else if (! strcmp (argv[nargs], "-quiet"))
6661 quiet = 1;
6662 else if (! strcmp (argv[nargs], "-ftime-report"))
6663 return;
6665 if (out_arg == -1 || !quiet)
6666 return;
6668 memset (temp_files, '\0', sizeof (temp_files));
6669 new_argv = XALLOCAVEC (const char *, nargs + 4);
6670 memcpy (new_argv, argv, (nargs + 1) * sizeof (const char *));
6671 new_argv[nargs++] = "-frandom-seed=0";
6672 new_argv[nargs++] = "-fdump-noaddr";
6673 new_argv[nargs] = NULL;
6674 if (new_argv[out_arg][2] == '\0')
6675 new_argv[out_arg + 1] = "-";
6676 else
6677 new_argv[out_arg] = "-o-";
6679 int status;
6680 for (attempt = 0; attempt < RETRY_ICE_ATTEMPTS; ++attempt)
6682 int emit_system_info = 0;
6683 int append = 0;
6684 temp_stdout_files[attempt] = make_temp_file (".out");
6685 temp_stderr_files[attempt] = make_temp_file (".err");
6687 if (attempt == RETRY_ICE_ATTEMPTS - 1)
6689 append = 1;
6690 emit_system_info = 1;
6693 status = run_attempt (new_argv, temp_stdout_files[attempt],
6694 temp_stderr_files[attempt], emit_system_info,
6695 append);
6697 if (status != ATTEMPT_STATUS_ICE)
6699 fnotice (stderr, "The bug is not reproducible, so it is"
6700 " likely a hardware or OS problem.\n");
6701 goto out;
6705 if (!check_repro (temp_stdout_files, temp_stderr_files))
6706 goto out;
6709 /* Insert commented out backtrace into report file. */
6710 char **stderr_commented = &temp_stdout_files[RETRY_ICE_ATTEMPTS - 1];
6711 insert_comments (temp_stderr_files[RETRY_ICE_ATTEMPTS - 1],
6712 *stderr_commented);
6714 /* In final attempt we append compiler options and preprocesssed code to last
6715 generated .out file with configuration and backtrace. */
6716 char **output = &temp_stdout_files[RETRY_ICE_ATTEMPTS - 1];
6717 do_report_bug (new_argv, nargs, stderr_commented, output);
6720 out:
6721 for (i = 0; i < RETRY_ICE_ATTEMPTS * 2; i++)
6722 if (temp_files[i])
6724 unlink (temp_stdout_files[i]);
6725 free (temp_stdout_files[i]);
6729 /* Search for a file named NAME trying various prefixes including the
6730 user's -B prefix and some standard ones.
6731 Return the absolute file name found. If nothing is found, return NAME. */
6733 static const char *
6734 find_file (const char *name)
6736 char *newname = find_a_file (&startfile_prefixes, name, R_OK, true);
6737 return newname ? newname : name;
6740 /* Determine whether a directory exists. If LINKER, return 0 for
6741 certain fixed names not needed by the linker. */
6743 static int
6744 is_directory (const char *path1, bool linker)
6746 int len1;
6747 char *path;
6748 char *cp;
6749 struct stat st;
6751 /* Ensure the string ends with "/.". The resulting path will be a
6752 directory even if the given path is a symbolic link. */
6753 len1 = strlen (path1);
6754 path = (char *) alloca (3 + len1);
6755 memcpy (path, path1, len1);
6756 cp = path + len1;
6757 if (!IS_DIR_SEPARATOR (cp[-1]))
6758 *cp++ = DIR_SEPARATOR;
6759 *cp++ = '.';
6760 *cp = '\0';
6762 /* Exclude directories that the linker is known to search. */
6763 if (linker
6764 && IS_DIR_SEPARATOR (path[0])
6765 && ((cp - path == 6
6766 && filename_ncmp (path + 1, "lib", 3) == 0)
6767 || (cp - path == 10
6768 && filename_ncmp (path + 1, "usr", 3) == 0
6769 && IS_DIR_SEPARATOR (path[4])
6770 && filename_ncmp (path + 5, "lib", 3) == 0)))
6771 return 0;
6773 return (stat (path, &st) >= 0 && S_ISDIR (st.st_mode));
6776 /* Set up the various global variables to indicate that we're processing
6777 the input file named FILENAME. */
6779 void
6780 set_input (const char *filename)
6782 const char *p;
6784 gcc_input_filename = filename;
6785 input_filename_length = strlen (gcc_input_filename);
6786 input_basename = lbasename (gcc_input_filename);
6788 /* Find a suffix starting with the last period,
6789 and set basename_length to exclude that suffix. */
6790 basename_length = strlen (input_basename);
6791 suffixed_basename_length = basename_length;
6792 p = input_basename + basename_length;
6793 while (p != input_basename && *p != '.')
6794 --p;
6795 if (*p == '.' && p != input_basename)
6797 basename_length = p - input_basename;
6798 input_suffix = p + 1;
6800 else
6801 input_suffix = "";
6803 /* If a spec for 'g', 'u', or 'U' is seen with -save-temps then
6804 we will need to do a stat on the gcc_input_filename. The
6805 INPUT_STAT_SET signals that the stat is needed. */
6806 input_stat_set = 0;
6809 /* On fatal signals, delete all the temporary files. */
6811 static void
6812 fatal_signal (int signum)
6814 signal (signum, SIG_DFL);
6815 delete_failure_queue ();
6816 delete_temp_files ();
6817 /* Get the same signal again, this time not handled,
6818 so its normal effect occurs. */
6819 kill (getpid (), signum);
6822 /* Compare the contents of the two files named CMPFILE[0] and
6823 CMPFILE[1]. Return zero if they're identical, nonzero
6824 otherwise. */
6826 static int
6827 compare_files (char *cmpfile[])
6829 int ret = 0;
6830 FILE *temp[2] = { NULL, NULL };
6831 int i;
6833 #if HAVE_MMAP_FILE
6835 size_t length[2];
6836 void *map[2] = { NULL, NULL };
6838 for (i = 0; i < 2; i++)
6840 struct stat st;
6842 if (stat (cmpfile[i], &st) < 0 || !S_ISREG (st.st_mode))
6844 error ("%s: could not determine length of compare-debug file %s",
6845 gcc_input_filename, cmpfile[i]);
6846 ret = 1;
6847 break;
6850 length[i] = st.st_size;
6853 if (!ret && length[0] != length[1])
6855 error ("%s: -fcompare-debug failure (length)", gcc_input_filename);
6856 ret = 1;
6859 if (!ret)
6860 for (i = 0; i < 2; i++)
6862 int fd = open (cmpfile[i], O_RDONLY);
6863 if (fd < 0)
6865 error ("%s: could not open compare-debug file %s",
6866 gcc_input_filename, cmpfile[i]);
6867 ret = 1;
6868 break;
6871 map[i] = mmap (NULL, length[i], PROT_READ, MAP_PRIVATE, fd, 0);
6872 close (fd);
6874 if (map[i] == (void *) MAP_FAILED)
6876 ret = -1;
6877 break;
6881 if (!ret)
6883 if (memcmp (map[0], map[1], length[0]) != 0)
6885 error ("%s: -fcompare-debug failure", gcc_input_filename);
6886 ret = 1;
6890 for (i = 0; i < 2; i++)
6891 if (map[i])
6892 munmap ((caddr_t) map[i], length[i]);
6894 if (ret >= 0)
6895 return ret;
6897 ret = 0;
6899 #endif
6901 for (i = 0; i < 2; i++)
6903 temp[i] = fopen (cmpfile[i], "r");
6904 if (!temp[i])
6906 error ("%s: could not open compare-debug file %s",
6907 gcc_input_filename, cmpfile[i]);
6908 ret = 1;
6909 break;
6913 if (!ret && temp[0] && temp[1])
6914 for (;;)
6916 int c0, c1;
6917 c0 = fgetc (temp[0]);
6918 c1 = fgetc (temp[1]);
6920 if (c0 != c1)
6922 error ("%s: -fcompare-debug failure",
6923 gcc_input_filename);
6924 ret = 1;
6925 break;
6928 if (c0 == EOF)
6929 break;
6932 for (i = 1; i >= 0; i--)
6934 if (temp[i])
6935 fclose (temp[i]);
6938 return ret;
6941 /* driver::main is implemented as a series of driver:: method calls. */
6944 driver::main (int argc, char **argv)
6946 bool early_exit;
6948 set_progname (argv[0]);
6949 expand_at_files (&argc, &argv);
6950 decode_argv (argc, const_cast <const char **> (argv));
6951 global_initializations ();
6952 build_multilib_strings ();
6953 set_up_specs ();
6954 putenv_COLLECT_GCC (argv[0]);
6955 maybe_putenv_COLLECT_LTO_WRAPPER ();
6956 maybe_putenv_OFFLOAD_TARGETS ();
6957 handle_unrecognized_options ();
6959 if (!maybe_print_and_exit ())
6960 return 0;
6962 early_exit = prepare_infiles ();
6963 if (early_exit)
6964 return get_exit_code ();
6966 do_spec_on_infiles ();
6967 maybe_run_linker (argv[0]);
6968 final_actions ();
6969 return get_exit_code ();
6972 /* Locate the final component of argv[0] after any leading path, and set
6973 the program name accordingly. */
6975 void
6976 driver::set_progname (const char *argv0) const
6978 const char *p = argv0 + strlen (argv0);
6979 while (p != argv0 && !IS_DIR_SEPARATOR (p[-1]))
6980 --p;
6981 progname = p;
6983 xmalloc_set_program_name (progname);
6986 /* Expand any @ files within the command-line args,
6987 setting at_file_supplied if any were expanded. */
6989 void
6990 driver::expand_at_files (int *argc, char ***argv) const
6992 char **old_argv = *argv;
6994 expandargv (argc, argv);
6996 /* Determine if any expansions were made. */
6997 if (*argv != old_argv)
6998 at_file_supplied = true;
7001 /* Decode the command-line arguments from argc/argv into the
7002 decoded_options array. */
7004 void
7005 driver::decode_argv (int argc, const char **argv)
7007 /* Register the language-independent parameters. */
7008 global_init_params ();
7009 finish_params ();
7011 init_options_struct (&global_options, &global_options_set);
7013 decode_cmdline_options_to_array (argc, argv,
7014 CL_DRIVER,
7015 &decoded_options, &decoded_options_count);
7018 /* Perform various initializations and setup. */
7020 void
7021 driver::global_initializations ()
7023 /* Unlock the stdio streams. */
7024 unlock_std_streams ();
7026 gcc_init_libintl ();
7028 diagnostic_initialize (global_dc, 0);
7029 diagnostic_color_init (global_dc);
7031 #ifdef GCC_DRIVER_HOST_INITIALIZATION
7032 /* Perform host dependent initialization when needed. */
7033 GCC_DRIVER_HOST_INITIALIZATION;
7034 #endif
7036 if (atexit (delete_temp_files) != 0)
7037 fatal_error (input_location, "atexit failed");
7039 if (signal (SIGINT, SIG_IGN) != SIG_IGN)
7040 signal (SIGINT, fatal_signal);
7041 #ifdef SIGHUP
7042 if (signal (SIGHUP, SIG_IGN) != SIG_IGN)
7043 signal (SIGHUP, fatal_signal);
7044 #endif
7045 if (signal (SIGTERM, SIG_IGN) != SIG_IGN)
7046 signal (SIGTERM, fatal_signal);
7047 #ifdef SIGPIPE
7048 if (signal (SIGPIPE, SIG_IGN) != SIG_IGN)
7049 signal (SIGPIPE, fatal_signal);
7050 #endif
7051 #ifdef SIGCHLD
7052 /* We *MUST* set SIGCHLD to SIG_DFL so that the wait4() call will
7053 receive the signal. A different setting is inheritable */
7054 signal (SIGCHLD, SIG_DFL);
7055 #endif
7057 /* Parsing and gimplification sometimes need quite large stack.
7058 Increase stack size limits if possible. */
7059 stack_limit_increase (64 * 1024 * 1024);
7061 /* Allocate the argument vector. */
7062 alloc_args ();
7064 obstack_init (&obstack);
7067 /* Build multilib_select, et. al from the separate lines that make up each
7068 multilib selection. */
7070 void
7071 driver::build_multilib_strings () const
7074 const char *p;
7075 const char *const *q = multilib_raw;
7076 int need_space;
7078 obstack_init (&multilib_obstack);
7079 while ((p = *q++) != (char *) 0)
7080 obstack_grow (&multilib_obstack, p, strlen (p));
7082 obstack_1grow (&multilib_obstack, 0);
7083 multilib_select = XOBFINISH (&multilib_obstack, const char *);
7085 q = multilib_matches_raw;
7086 while ((p = *q++) != (char *) 0)
7087 obstack_grow (&multilib_obstack, p, strlen (p));
7089 obstack_1grow (&multilib_obstack, 0);
7090 multilib_matches = XOBFINISH (&multilib_obstack, const char *);
7092 q = multilib_exclusions_raw;
7093 while ((p = *q++) != (char *) 0)
7094 obstack_grow (&multilib_obstack, p, strlen (p));
7096 obstack_1grow (&multilib_obstack, 0);
7097 multilib_exclusions = XOBFINISH (&multilib_obstack, const char *);
7099 q = multilib_reuse_raw;
7100 while ((p = *q++) != (char *) 0)
7101 obstack_grow (&multilib_obstack, p, strlen (p));
7103 obstack_1grow (&multilib_obstack, 0);
7104 multilib_reuse = XOBFINISH (&multilib_obstack, const char *);
7106 need_space = FALSE;
7107 for (size_t i = 0; i < ARRAY_SIZE (multilib_defaults_raw); i++)
7109 if (need_space)
7110 obstack_1grow (&multilib_obstack, ' ');
7111 obstack_grow (&multilib_obstack,
7112 multilib_defaults_raw[i],
7113 strlen (multilib_defaults_raw[i]));
7114 need_space = TRUE;
7117 obstack_1grow (&multilib_obstack, 0);
7118 multilib_defaults = XOBFINISH (&multilib_obstack, const char *);
7122 /* Set up the spec-handling machinery. */
7124 void
7125 driver::set_up_specs () const
7127 const char *spec_machine_suffix;
7128 char *specs_file;
7129 size_t i;
7131 #ifdef INIT_ENVIRONMENT
7132 /* Set up any other necessary machine specific environment variables. */
7133 xputenv (INIT_ENVIRONMENT);
7134 #endif
7136 /* Make a table of what switches there are (switches, n_switches).
7137 Make a table of specified input files (infiles, n_infiles).
7138 Decode switches that are handled locally. */
7140 process_command (decoded_options_count, decoded_options);
7142 /* Initialize the vector of specs to just the default.
7143 This means one element containing 0s, as a terminator. */
7145 compilers = XNEWVAR (struct compiler, sizeof default_compilers);
7146 memcpy (compilers, default_compilers, sizeof default_compilers);
7147 n_compilers = n_default_compilers;
7149 /* Read specs from a file if there is one. */
7151 machine_suffix = concat (spec_host_machine, dir_separator_str, spec_version,
7152 accel_dir_suffix, dir_separator_str, NULL);
7153 just_machine_suffix = concat (spec_machine, dir_separator_str, NULL);
7155 specs_file = find_a_file (&startfile_prefixes, "specs", R_OK, true);
7156 /* Read the specs file unless it is a default one. */
7157 if (specs_file != 0 && strcmp (specs_file, "specs"))
7158 read_specs (specs_file, true, false);
7159 else
7160 init_spec ();
7162 #ifdef ACCEL_COMPILER
7163 spec_machine_suffix = machine_suffix;
7164 #else
7165 spec_machine_suffix = just_machine_suffix;
7166 #endif
7168 /* We need to check standard_exec_prefix/spec_machine_suffix/specs
7169 for any override of as, ld and libraries. */
7170 specs_file = (char *) alloca (strlen (standard_exec_prefix)
7171 + strlen (spec_machine_suffix) + sizeof ("specs"));
7172 strcpy (specs_file, standard_exec_prefix);
7173 strcat (specs_file, spec_machine_suffix);
7174 strcat (specs_file, "specs");
7175 if (access (specs_file, R_OK) == 0)
7176 read_specs (specs_file, true, false);
7178 /* Process any configure-time defaults specified for the command line
7179 options, via OPTION_DEFAULT_SPECS. */
7180 for (i = 0; i < ARRAY_SIZE (option_default_specs); i++)
7181 do_option_spec (option_default_specs[i].name,
7182 option_default_specs[i].spec);
7184 /* Process DRIVER_SELF_SPECS, adding any new options to the end
7185 of the command line. */
7187 for (i = 0; i < ARRAY_SIZE (driver_self_specs); i++)
7188 do_self_spec (driver_self_specs[i]);
7190 /* If not cross-compiling, look for executables in the standard
7191 places. */
7192 if (*cross_compile == '0')
7194 if (*md_exec_prefix)
7196 add_prefix (&exec_prefixes, md_exec_prefix, "GCC",
7197 PREFIX_PRIORITY_LAST, 0, 0);
7201 /* Process sysroot_suffix_spec. */
7202 if (*sysroot_suffix_spec != 0
7203 && !no_sysroot_suffix
7204 && do_spec_2 (sysroot_suffix_spec) == 0)
7206 if (argbuf.length () > 1)
7207 error ("spec failure: more than one arg to SYSROOT_SUFFIX_SPEC");
7208 else if (argbuf.length () == 1)
7209 target_sysroot_suffix = xstrdup (argbuf.last ());
7212 #ifdef HAVE_LD_SYSROOT
7213 /* Pass the --sysroot option to the linker, if it supports that. If
7214 there is a sysroot_suffix_spec, it has already been processed by
7215 this point, so target_system_root really is the system root we
7216 should be using. */
7217 if (target_system_root)
7219 obstack_grow (&obstack, "%(sysroot_spec) ", strlen ("%(sysroot_spec) "));
7220 obstack_grow0 (&obstack, link_spec, strlen (link_spec));
7221 set_spec ("link", XOBFINISH (&obstack, const char *), false);
7223 #endif
7225 /* Process sysroot_hdrs_suffix_spec. */
7226 if (*sysroot_hdrs_suffix_spec != 0
7227 && !no_sysroot_suffix
7228 && do_spec_2 (sysroot_hdrs_suffix_spec) == 0)
7230 if (argbuf.length () > 1)
7231 error ("spec failure: more than one arg to SYSROOT_HEADERS_SUFFIX_SPEC");
7232 else if (argbuf.length () == 1)
7233 target_sysroot_hdrs_suffix = xstrdup (argbuf.last ());
7236 /* Look for startfiles in the standard places. */
7237 if (*startfile_prefix_spec != 0
7238 && do_spec_2 (startfile_prefix_spec) == 0
7239 && do_spec_1 (" ", 0, NULL) == 0)
7241 const char *arg;
7242 int ndx;
7243 FOR_EACH_VEC_ELT (argbuf, ndx, arg)
7244 add_sysrooted_prefix (&startfile_prefixes, arg, "BINUTILS",
7245 PREFIX_PRIORITY_LAST, 0, 1);
7247 /* We should eventually get rid of all these and stick to
7248 startfile_prefix_spec exclusively. */
7249 else if (*cross_compile == '0' || target_system_root)
7251 if (*md_startfile_prefix)
7252 add_sysrooted_prefix (&startfile_prefixes, md_startfile_prefix,
7253 "GCC", PREFIX_PRIORITY_LAST, 0, 1);
7255 if (*md_startfile_prefix_1)
7256 add_sysrooted_prefix (&startfile_prefixes, md_startfile_prefix_1,
7257 "GCC", PREFIX_PRIORITY_LAST, 0, 1);
7259 /* If standard_startfile_prefix is relative, base it on
7260 standard_exec_prefix. This lets us move the installed tree
7261 as a unit. If GCC_EXEC_PREFIX is defined, base
7262 standard_startfile_prefix on that as well.
7264 If the prefix is relative, only search it for native compilers;
7265 otherwise we will search a directory containing host libraries. */
7266 if (IS_ABSOLUTE_PATH (standard_startfile_prefix))
7267 add_sysrooted_prefix (&startfile_prefixes,
7268 standard_startfile_prefix, "BINUTILS",
7269 PREFIX_PRIORITY_LAST, 0, 1);
7270 else if (*cross_compile == '0')
7272 add_prefix (&startfile_prefixes,
7273 concat (gcc_exec_prefix
7274 ? gcc_exec_prefix : standard_exec_prefix,
7275 machine_suffix,
7276 standard_startfile_prefix, NULL),
7277 NULL, PREFIX_PRIORITY_LAST, 0, 1);
7280 /* Sysrooted prefixes are relocated because target_system_root is
7281 also relocated by gcc_exec_prefix. */
7282 if (*standard_startfile_prefix_1)
7283 add_sysrooted_prefix (&startfile_prefixes,
7284 standard_startfile_prefix_1, "BINUTILS",
7285 PREFIX_PRIORITY_LAST, 0, 1);
7286 if (*standard_startfile_prefix_2)
7287 add_sysrooted_prefix (&startfile_prefixes,
7288 standard_startfile_prefix_2, "BINUTILS",
7289 PREFIX_PRIORITY_LAST, 0, 1);
7292 /* Process any user specified specs in the order given on the command
7293 line. */
7294 for (struct user_specs *uptr = user_specs_head; uptr; uptr = uptr->next)
7296 char *filename = find_a_file (&startfile_prefixes, uptr->filename,
7297 R_OK, true);
7298 read_specs (filename ? filename : uptr->filename, false, true);
7301 /* Process any user self specs. */
7303 struct spec_list *sl;
7304 for (sl = specs; sl; sl = sl->next)
7305 if (sl->name_len == sizeof "self_spec" - 1
7306 && !strcmp (sl->name, "self_spec"))
7307 do_self_spec (*sl->ptr_spec);
7310 if (compare_debug)
7312 enum save_temps save;
7314 if (!compare_debug_second)
7316 n_switches_debug_check[1] = n_switches;
7317 n_switches_alloc_debug_check[1] = n_switches_alloc;
7318 switches_debug_check[1] = XDUPVEC (struct switchstr, switches,
7319 n_switches_alloc);
7321 do_self_spec ("%:compare-debug-self-opt()");
7322 n_switches_debug_check[0] = n_switches;
7323 n_switches_alloc_debug_check[0] = n_switches_alloc;
7324 switches_debug_check[0] = switches;
7326 n_switches = n_switches_debug_check[1];
7327 n_switches_alloc = n_switches_alloc_debug_check[1];
7328 switches = switches_debug_check[1];
7331 /* Avoid crash when computing %j in this early. */
7332 save = save_temps_flag;
7333 save_temps_flag = SAVE_TEMPS_NONE;
7335 compare_debug = -compare_debug;
7336 do_self_spec ("%:compare-debug-self-opt()");
7338 save_temps_flag = save;
7340 if (!compare_debug_second)
7342 n_switches_debug_check[1] = n_switches;
7343 n_switches_alloc_debug_check[1] = n_switches_alloc;
7344 switches_debug_check[1] = switches;
7345 compare_debug = -compare_debug;
7346 n_switches = n_switches_debug_check[0];
7347 n_switches_alloc = n_switches_debug_check[0];
7348 switches = switches_debug_check[0];
7353 /* If we have a GCC_EXEC_PREFIX envvar, modify it for cpp's sake. */
7354 if (gcc_exec_prefix)
7355 gcc_exec_prefix = concat (gcc_exec_prefix, spec_host_machine,
7356 dir_separator_str, spec_version,
7357 accel_dir_suffix, dir_separator_str, NULL);
7359 /* Now we have the specs.
7360 Set the `valid' bits for switches that match anything in any spec. */
7362 validate_all_switches ();
7364 /* Now that we have the switches and the specs, set
7365 the subdirectory based on the options. */
7366 set_multilib_dir ();
7369 /* Set up to remember the pathname of gcc and any options
7370 needed for collect. We use argv[0] instead of progname because
7371 we need the complete pathname. */
7373 void
7374 driver::putenv_COLLECT_GCC (const char *argv0) const
7376 obstack_init (&collect_obstack);
7377 obstack_grow (&collect_obstack, "COLLECT_GCC=", sizeof ("COLLECT_GCC=") - 1);
7378 obstack_grow (&collect_obstack, argv0, strlen (argv0) + 1);
7379 xputenv (XOBFINISH (&collect_obstack, char *));
7382 /* Set up to remember the pathname of the lto wrapper. */
7384 void
7385 driver::maybe_putenv_COLLECT_LTO_WRAPPER () const
7387 char *lto_wrapper_file;
7389 if (have_c)
7390 lto_wrapper_file = NULL;
7391 else
7392 lto_wrapper_file = find_a_file (&exec_prefixes, "lto-wrapper",
7393 X_OK, false);
7394 if (lto_wrapper_file)
7396 lto_wrapper_file = convert_white_space (lto_wrapper_file);
7397 lto_wrapper_spec = lto_wrapper_file;
7398 obstack_init (&collect_obstack);
7399 obstack_grow (&collect_obstack, "COLLECT_LTO_WRAPPER=",
7400 sizeof ("COLLECT_LTO_WRAPPER=") - 1);
7401 obstack_grow (&collect_obstack, lto_wrapper_spec,
7402 strlen (lto_wrapper_spec) + 1);
7403 xputenv (XOBFINISH (&collect_obstack, char *));
7408 /* Set up to remember the names of offload targets. */
7410 void
7411 driver::maybe_putenv_OFFLOAD_TARGETS () const
7413 const char *targets = offload_targets;
7415 /* If no targets specified by -foffload, use all available targets. */
7416 if (!targets)
7417 targets = OFFLOAD_TARGETS;
7419 if (strlen (targets) > 0)
7421 obstack_grow (&collect_obstack, "OFFLOAD_TARGET_NAMES=",
7422 sizeof ("OFFLOAD_TARGET_NAMES=") - 1);
7423 obstack_grow (&collect_obstack, targets,
7424 strlen (targets) + 1);
7425 xputenv (XOBFINISH (&collect_obstack, char *));
7428 free (offload_targets);
7431 /* Reject switches that no pass was interested in. */
7433 void
7434 driver::handle_unrecognized_options () const
7436 for (size_t i = 0; (int) i < n_switches; i++)
7437 if (! switches[i].validated)
7438 error ("unrecognized command line option %<-%s%>", switches[i].part1);
7441 /* Handle the various -print-* options, returning 0 if the driver
7442 should exit, or nonzero if the driver should continue. */
7445 driver::maybe_print_and_exit () const
7447 if (print_search_dirs)
7449 printf (_("install: %s%s\n"),
7450 gcc_exec_prefix ? gcc_exec_prefix : standard_exec_prefix,
7451 gcc_exec_prefix ? "" : machine_suffix);
7452 printf (_("programs: %s\n"),
7453 build_search_list (&exec_prefixes, "", false, false));
7454 printf (_("libraries: %s\n"),
7455 build_search_list (&startfile_prefixes, "", false, true));
7456 return (0);
7459 if (print_file_name)
7461 printf ("%s\n", find_file (print_file_name));
7462 return (0);
7465 if (print_prog_name)
7467 if (use_ld != NULL && ! strcmp (print_prog_name, "ld"))
7469 /* Append USE_LD to to the default linker. */
7470 #ifdef DEFAULT_LINKER
7471 char *ld;
7472 # ifdef HAVE_HOST_EXECUTABLE_SUFFIX
7473 int len = (sizeof (DEFAULT_LINKER)
7474 - sizeof (HOST_EXECUTABLE_SUFFIX));
7475 ld = NULL;
7476 if (len > 0)
7478 char *default_linker = xstrdup (DEFAULT_LINKER);
7479 /* Strip HOST_EXECUTABLE_SUFFIX if DEFAULT_LINKER contains
7480 HOST_EXECUTABLE_SUFFIX. */
7481 if (! strcmp (&default_linker[len], HOST_EXECUTABLE_SUFFIX))
7483 default_linker[len] = '\0';
7484 ld = concat (default_linker, use_ld,
7485 HOST_EXECUTABLE_SUFFIX, NULL);
7488 if (ld == NULL)
7489 # endif
7490 ld = concat (DEFAULT_LINKER, use_ld, NULL);
7491 if (access (ld, X_OK) == 0)
7493 printf ("%s\n", ld);
7494 return (0);
7496 #endif
7497 print_prog_name = concat (print_prog_name, use_ld, NULL);
7499 char *newname = find_a_file (&exec_prefixes, print_prog_name, X_OK, 0);
7500 printf ("%s\n", (newname ? newname : print_prog_name));
7501 return (0);
7504 if (print_multi_lib)
7506 print_multilib_info ();
7507 return (0);
7510 if (print_multi_directory)
7512 if (multilib_dir == NULL)
7513 printf (".\n");
7514 else
7515 printf ("%s\n", multilib_dir);
7516 return (0);
7519 if (print_multiarch)
7521 if (multiarch_dir == NULL)
7522 printf ("\n");
7523 else
7524 printf ("%s\n", multiarch_dir);
7525 return (0);
7528 if (print_sysroot)
7530 if (target_system_root)
7532 if (target_sysroot_suffix)
7533 printf ("%s%s\n", target_system_root, target_sysroot_suffix);
7534 else
7535 printf ("%s\n", target_system_root);
7537 return (0);
7540 if (print_multi_os_directory)
7542 if (multilib_os_dir == NULL)
7543 printf (".\n");
7544 else
7545 printf ("%s\n", multilib_os_dir);
7546 return (0);
7549 if (print_sysroot_headers_suffix)
7551 if (*sysroot_hdrs_suffix_spec)
7553 printf("%s\n", (target_sysroot_hdrs_suffix
7554 ? target_sysroot_hdrs_suffix
7555 : ""));
7556 return (0);
7558 else
7559 /* The error status indicates that only one set of fixed
7560 headers should be built. */
7561 fatal_error (input_location,
7562 "not configured with sysroot headers suffix");
7565 if (print_help_list)
7567 display_help ();
7569 if (! verbose_flag)
7571 printf (_("\nFor bug reporting instructions, please see:\n"));
7572 printf ("%s.\n", bug_report_url);
7574 return (0);
7577 /* We do not exit here. Instead we have created a fake input file
7578 called 'help-dummy' which needs to be compiled, and we pass this
7579 on the various sub-processes, along with the --help switch.
7580 Ensure their output appears after ours. */
7581 fputc ('\n', stdout);
7582 fflush (stdout);
7585 if (print_version)
7587 printf (_("%s %s%s\n"), progname, pkgversion_string,
7588 version_string);
7589 printf ("Copyright %s 2015 Free Software Foundation, Inc.\n",
7590 _("(C)"));
7591 fputs (_("This is free software; see the source for copying conditions. There is NO\n\
7592 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\n"),
7593 stdout);
7594 if (! verbose_flag)
7595 return 0;
7597 /* We do not exit here. We use the same mechanism of --help to print
7598 the version of the sub-processes. */
7599 fputc ('\n', stdout);
7600 fflush (stdout);
7603 if (verbose_flag)
7605 print_configuration (stderr);
7606 if (n_infiles == 0)
7607 return (0);
7610 return 1;
7613 /* Figure out what to do with each input file.
7614 Return true if we need to exit early from "main", false otherwise. */
7616 bool
7617 driver::prepare_infiles ()
7619 size_t i;
7620 int lang_n_infiles = 0;
7622 if (n_infiles == added_libraries)
7623 fatal_error (input_location, "no input files");
7625 if (seen_error ())
7626 /* Early exit needed from main. */
7627 return true;
7629 /* Make a place to record the compiler output file names
7630 that correspond to the input files. */
7632 i = n_infiles;
7633 i += lang_specific_extra_outfiles;
7634 outfiles = XCNEWVEC (const char *, i);
7636 /* Record which files were specified explicitly as link input. */
7638 explicit_link_files = XCNEWVEC (char, n_infiles);
7640 combine_inputs = have_o || flag_wpa;
7642 for (i = 0; (int) i < n_infiles; i++)
7644 const char *name = infiles[i].name;
7645 struct compiler *compiler = lookup_compiler (name,
7646 strlen (name),
7647 infiles[i].language);
7649 if (compiler && !(compiler->combinable))
7650 combine_inputs = false;
7652 if (lang_n_infiles > 0 && compiler != input_file_compiler
7653 && infiles[i].language && infiles[i].language[0] != '*')
7654 infiles[i].incompiler = compiler;
7655 else if (compiler)
7657 lang_n_infiles++;
7658 input_file_compiler = compiler;
7659 infiles[i].incompiler = compiler;
7661 else
7663 /* Since there is no compiler for this input file, assume it is a
7664 linker file. */
7665 explicit_link_files[i] = 1;
7666 infiles[i].incompiler = NULL;
7668 infiles[i].compiled = false;
7669 infiles[i].preprocessed = false;
7672 if (!combine_inputs && have_c && have_o && lang_n_infiles > 1)
7673 fatal_error (input_location,
7674 "cannot specify -o with -c, -S or -E with multiple files");
7676 /* No early exit needed from main; we can continue. */
7677 return false;
7680 /* Run the spec machinery on each input file. */
7682 void
7683 driver::do_spec_on_infiles () const
7685 size_t i;
7687 for (i = 0; (int) i < n_infiles; i++)
7689 int this_file_error = 0;
7691 /* Tell do_spec what to substitute for %i. */
7693 input_file_number = i;
7694 set_input (infiles[i].name);
7696 if (infiles[i].compiled)
7697 continue;
7699 /* Use the same thing in %o, unless cp->spec says otherwise. */
7701 outfiles[i] = gcc_input_filename;
7703 /* Figure out which compiler from the file's suffix. */
7705 input_file_compiler
7706 = lookup_compiler (infiles[i].name, input_filename_length,
7707 infiles[i].language);
7709 if (input_file_compiler)
7711 /* Ok, we found an applicable compiler. Run its spec. */
7713 if (input_file_compiler->spec[0] == '#')
7715 error ("%s: %s compiler not installed on this system",
7716 gcc_input_filename, &input_file_compiler->spec[1]);
7717 this_file_error = 1;
7719 else
7721 int value;
7723 if (compare_debug)
7725 free (debug_check_temp_file[0]);
7726 debug_check_temp_file[0] = NULL;
7728 free (debug_check_temp_file[1]);
7729 debug_check_temp_file[1] = NULL;
7732 value = do_spec (input_file_compiler->spec);
7733 infiles[i].compiled = true;
7734 if (value < 0)
7735 this_file_error = 1;
7736 else if (compare_debug && debug_check_temp_file[0])
7738 if (verbose_flag)
7739 inform (0, "recompiling with -fcompare-debug");
7741 compare_debug = -compare_debug;
7742 n_switches = n_switches_debug_check[1];
7743 n_switches_alloc = n_switches_alloc_debug_check[1];
7744 switches = switches_debug_check[1];
7746 value = do_spec (input_file_compiler->spec);
7748 compare_debug = -compare_debug;
7749 n_switches = n_switches_debug_check[0];
7750 n_switches_alloc = n_switches_alloc_debug_check[0];
7751 switches = switches_debug_check[0];
7753 if (value < 0)
7755 error ("during -fcompare-debug recompilation");
7756 this_file_error = 1;
7759 gcc_assert (debug_check_temp_file[1]
7760 && filename_cmp (debug_check_temp_file[0],
7761 debug_check_temp_file[1]));
7763 if (verbose_flag)
7764 inform (0, "comparing final insns dumps");
7766 if (compare_files (debug_check_temp_file))
7767 this_file_error = 1;
7770 if (compare_debug)
7772 free (debug_check_temp_file[0]);
7773 debug_check_temp_file[0] = NULL;
7775 free (debug_check_temp_file[1]);
7776 debug_check_temp_file[1] = NULL;
7781 /* If this file's name does not contain a recognized suffix,
7782 record it as explicit linker input. */
7784 else
7785 explicit_link_files[i] = 1;
7787 /* Clear the delete-on-failure queue, deleting the files in it
7788 if this compilation failed. */
7790 if (this_file_error)
7792 delete_failure_queue ();
7793 errorcount++;
7795 /* If this compilation succeeded, don't delete those files later. */
7796 clear_failure_queue ();
7799 /* Reset the input file name to the first compile/object file name, for use
7800 with %b in LINK_SPEC. We use the first input file that we can find
7801 a compiler to compile it instead of using infiles.language since for
7802 languages other than C we use aliases that we then lookup later. */
7803 if (n_infiles > 0)
7805 int i;
7807 for (i = 0; i < n_infiles ; i++)
7808 if (infiles[i].incompiler
7809 || (infiles[i].language && infiles[i].language[0] != '*'))
7811 set_input (infiles[i].name);
7812 break;
7816 if (!seen_error ())
7818 /* Make sure INPUT_FILE_NUMBER points to first available open
7819 slot. */
7820 input_file_number = n_infiles;
7821 if (lang_specific_pre_link ())
7822 errorcount++;
7826 /* If we have to run the linker, do it now. */
7828 void
7829 driver::maybe_run_linker (const char *argv0) const
7831 size_t i;
7832 int linker_was_run = 0;
7833 int num_linker_inputs;
7835 /* Determine if there are any linker input files. */
7836 num_linker_inputs = 0;
7837 for (i = 0; (int) i < n_infiles; i++)
7838 if (explicit_link_files[i] || outfiles[i] != NULL)
7839 num_linker_inputs++;
7841 /* Run ld to link all the compiler output files. */
7843 if (num_linker_inputs > 0 && !seen_error () && print_subprocess_help < 2)
7845 int tmp = execution_count;
7847 if (! have_c)
7849 #if HAVE_LTO_PLUGIN > 0
7850 #if HAVE_LTO_PLUGIN == 2
7851 const char *fno_use_linker_plugin = "fno-use-linker-plugin";
7852 #else
7853 const char *fuse_linker_plugin = "fuse-linker-plugin";
7854 #endif
7855 #endif
7857 /* We'll use ld if we can't find collect2. */
7858 if (! strcmp (linker_name_spec, "collect2"))
7860 char *s = find_a_file (&exec_prefixes, "collect2", X_OK, false);
7861 if (s == NULL)
7862 linker_name_spec = "ld";
7865 #if HAVE_LTO_PLUGIN > 0
7866 #if HAVE_LTO_PLUGIN == 2
7867 if (!switch_matches (fno_use_linker_plugin,
7868 fno_use_linker_plugin
7869 + strlen (fno_use_linker_plugin), 0))
7870 #else
7871 if (switch_matches (fuse_linker_plugin,
7872 fuse_linker_plugin
7873 + strlen (fuse_linker_plugin), 0))
7874 #endif
7876 char *temp_spec = find_a_file (&exec_prefixes,
7877 LTOPLUGINSONAME, R_OK,
7878 false);
7879 if (!temp_spec)
7880 fatal_error (input_location,
7881 "-fuse-linker-plugin, but %s not found",
7882 LTOPLUGINSONAME);
7883 linker_plugin_file_spec = convert_white_space (temp_spec);
7885 #endif
7886 lto_gcc_spec = argv0;
7889 /* Rebuild the COMPILER_PATH and LIBRARY_PATH environment variables
7890 for collect. */
7891 putenv_from_prefixes (&exec_prefixes, "COMPILER_PATH", false);
7892 putenv_from_prefixes (&startfile_prefixes, LIBRARY_PATH_ENV, true);
7894 if (print_subprocess_help == 1)
7896 printf (_("\nLinker options\n==============\n\n"));
7897 printf (_("Use \"-Wl,OPTION\" to pass \"OPTION\""
7898 " to the linker.\n\n"));
7899 fflush (stdout);
7901 int value = do_spec (link_command_spec);
7902 if (value < 0)
7903 errorcount = 1;
7904 linker_was_run = (tmp != execution_count);
7907 /* If options said don't run linker,
7908 complain about input files to be given to the linker. */
7910 if (! linker_was_run && !seen_error ())
7911 for (i = 0; (int) i < n_infiles; i++)
7912 if (explicit_link_files[i]
7913 && !(infiles[i].language && infiles[i].language[0] == '*'))
7914 warning (0, "%s: linker input file unused because linking not done",
7915 outfiles[i]);
7918 /* The end of "main". */
7920 void
7921 driver::final_actions () const
7923 /* Delete some or all of the temporary files we made. */
7925 if (seen_error ())
7926 delete_failure_queue ();
7927 delete_temp_files ();
7929 if (print_help_list)
7931 printf (("\nFor bug reporting instructions, please see:\n"));
7932 printf ("%s\n", bug_report_url);
7936 /* Determine what the exit code of the driver should be. */
7939 driver::get_exit_code () const
7941 return (signal_count != 0 ? 2
7942 : seen_error () ? (pass_exit_codes ? greatest_status : 1)
7943 : 0);
7946 /* Find the proper compilation spec for the file name NAME,
7947 whose length is LENGTH. LANGUAGE is the specified language,
7948 or 0 if this file is to be passed to the linker. */
7950 static struct compiler *
7951 lookup_compiler (const char *name, size_t length, const char *language)
7953 struct compiler *cp;
7955 /* If this was specified by the user to be a linker input, indicate that. */
7956 if (language != 0 && language[0] == '*')
7957 return 0;
7959 /* Otherwise, look for the language, if one is spec'd. */
7960 if (language != 0)
7962 for (cp = compilers + n_compilers - 1; cp >= compilers; cp--)
7963 if (cp->suffix[0] == '@' && !strcmp (cp->suffix + 1, language))
7964 return cp;
7966 error ("language %s not recognized", language);
7967 return 0;
7970 /* Look for a suffix. */
7971 for (cp = compilers + n_compilers - 1; cp >= compilers; cp--)
7973 if (/* The suffix `-' matches only the file name `-'. */
7974 (!strcmp (cp->suffix, "-") && !strcmp (name, "-"))
7975 || (strlen (cp->suffix) < length
7976 /* See if the suffix matches the end of NAME. */
7977 && !strcmp (cp->suffix,
7978 name + length - strlen (cp->suffix))
7980 break;
7983 #if defined (OS2) ||defined (HAVE_DOS_BASED_FILE_SYSTEM)
7984 /* Look again, but case-insensitively this time. */
7985 if (cp < compilers)
7986 for (cp = compilers + n_compilers - 1; cp >= compilers; cp--)
7988 if (/* The suffix `-' matches only the file name `-'. */
7989 (!strcmp (cp->suffix, "-") && !strcmp (name, "-"))
7990 || (strlen (cp->suffix) < length
7991 /* See if the suffix matches the end of NAME. */
7992 && ((!strcmp (cp->suffix,
7993 name + length - strlen (cp->suffix))
7994 || !strpbrk (cp->suffix, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"))
7995 && !strcasecmp (cp->suffix,
7996 name + length - strlen (cp->suffix)))
7998 break;
8000 #endif
8002 if (cp >= compilers)
8004 if (cp->spec[0] != '@')
8005 /* A non-alias entry: return it. */
8006 return cp;
8008 /* An alias entry maps a suffix to a language.
8009 Search for the language; pass 0 for NAME and LENGTH
8010 to avoid infinite recursion if language not found. */
8011 return lookup_compiler (NULL, 0, cp->spec + 1);
8013 return 0;
8016 static char *
8017 save_string (const char *s, int len)
8019 char *result = XNEWVEC (char, len + 1);
8021 memcpy (result, s, len);
8022 result[len] = 0;
8023 return result;
8026 void
8027 pfatal_with_name (const char *name)
8029 perror_with_name (name);
8030 delete_temp_files ();
8031 exit (1);
8034 static void
8035 perror_with_name (const char *name)
8037 error ("%s: %m", name);
8040 static inline void
8041 validate_switches_from_spec (const char *spec, bool user)
8043 const char *p = spec;
8044 char c;
8045 while ((c = *p++))
8046 if (c == '%' && (*p == '{' || *p == '<' || (*p == 'W' && *++p == '{')))
8047 /* We have a switch spec. */
8048 p = validate_switches (p + 1, user);
8051 static void
8052 validate_all_switches (void)
8054 struct compiler *comp;
8055 struct spec_list *spec;
8057 for (comp = compilers; comp->spec; comp++)
8058 validate_switches_from_spec (comp->spec, false);
8060 /* Look through the linked list of specs read from the specs file. */
8061 for (spec = specs; spec; spec = spec->next)
8062 validate_switches_from_spec (*spec->ptr_spec, spec->user_p);
8064 validate_switches_from_spec (link_command_spec, false);
8067 /* Look at the switch-name that comes after START
8068 and mark as valid all supplied switches that match it. */
8070 static const char *
8071 validate_switches (const char *start, bool user_spec)
8073 const char *p = start;
8074 const char *atom;
8075 size_t len;
8076 int i;
8077 bool suffix = false;
8078 bool starred = false;
8080 #define SKIP_WHITE() do { while (*p == ' ' || *p == '\t') p++; } while (0)
8082 next_member:
8083 SKIP_WHITE ();
8085 if (*p == '!')
8086 p++;
8088 SKIP_WHITE ();
8089 if (*p == '.' || *p == ',')
8090 suffix = true, p++;
8092 atom = p;
8093 while (ISIDNUM (*p) || *p == '-' || *p == '+' || *p == '='
8094 || *p == ',' || *p == '.' || *p == '@')
8095 p++;
8096 len = p - atom;
8098 if (*p == '*')
8099 starred = true, p++;
8101 SKIP_WHITE ();
8103 if (!suffix)
8105 /* Mark all matching switches as valid. */
8106 for (i = 0; i < n_switches; i++)
8107 if (!strncmp (switches[i].part1, atom, len)
8108 && (starred || switches[i].part1[len] == '\0')
8109 && (switches[i].known || user_spec))
8110 switches[i].validated = true;
8113 if (*p) p++;
8114 if (*p && (p[-1] == '|' || p[-1] == '&'))
8115 goto next_member;
8117 if (*p && p[-1] == ':')
8119 while (*p && *p != ';' && *p != '}')
8121 if (*p == '%')
8123 p++;
8124 if (*p == '{' || *p == '<')
8125 p = validate_switches (p+1, user_spec);
8126 else if (p[0] == 'W' && p[1] == '{')
8127 p = validate_switches (p+2, user_spec);
8129 else
8130 p++;
8133 if (*p) p++;
8134 if (*p && p[-1] == ';')
8135 goto next_member;
8138 return p;
8139 #undef SKIP_WHITE
8142 struct mdswitchstr
8144 const char *str;
8145 int len;
8148 static struct mdswitchstr *mdswitches;
8149 static int n_mdswitches;
8151 /* Check whether a particular argument was used. The first time we
8152 canonicalize the switches to keep only the ones we care about. */
8154 static int
8155 used_arg (const char *p, int len)
8157 struct mswitchstr
8159 const char *str;
8160 const char *replace;
8161 int len;
8162 int rep_len;
8165 static struct mswitchstr *mswitches;
8166 static int n_mswitches;
8167 int i, j;
8169 if (!mswitches)
8171 struct mswitchstr *matches;
8172 const char *q;
8173 int cnt = 0;
8175 /* Break multilib_matches into the component strings of string
8176 and replacement string. */
8177 for (q = multilib_matches; *q != '\0'; q++)
8178 if (*q == ';')
8179 cnt++;
8181 matches
8182 = (struct mswitchstr *) alloca ((sizeof (struct mswitchstr)) * cnt);
8183 i = 0;
8184 q = multilib_matches;
8185 while (*q != '\0')
8187 matches[i].str = q;
8188 while (*q != ' ')
8190 if (*q == '\0')
8192 invalid_matches:
8193 fatal_error (input_location, "multilib spec %qs is invalid",
8194 multilib_matches);
8196 q++;
8198 matches[i].len = q - matches[i].str;
8200 matches[i].replace = ++q;
8201 while (*q != ';' && *q != '\0')
8203 if (*q == ' ')
8204 goto invalid_matches;
8205 q++;
8207 matches[i].rep_len = q - matches[i].replace;
8208 i++;
8209 if (*q == ';')
8210 q++;
8213 /* Now build a list of the replacement string for switches that we care
8214 about. Make sure we allocate at least one entry. This prevents
8215 xmalloc from calling fatal, and prevents us from re-executing this
8216 block of code. */
8217 mswitches
8218 = XNEWVEC (struct mswitchstr, n_mdswitches + (n_switches ? n_switches : 1));
8219 for (i = 0; i < n_switches; i++)
8220 if ((switches[i].live_cond & SWITCH_IGNORE) == 0)
8222 int xlen = strlen (switches[i].part1);
8223 for (j = 0; j < cnt; j++)
8224 if (xlen == matches[j].len
8225 && ! strncmp (switches[i].part1, matches[j].str, xlen))
8227 mswitches[n_mswitches].str = matches[j].replace;
8228 mswitches[n_mswitches].len = matches[j].rep_len;
8229 mswitches[n_mswitches].replace = (char *) 0;
8230 mswitches[n_mswitches].rep_len = 0;
8231 n_mswitches++;
8232 break;
8236 /* Add MULTILIB_DEFAULTS switches too, as long as they were not present
8237 on the command line nor any options mutually incompatible with
8238 them. */
8239 for (i = 0; i < n_mdswitches; i++)
8241 const char *r;
8243 for (q = multilib_options; *q != '\0'; *q && q++)
8245 while (*q == ' ')
8246 q++;
8248 r = q;
8249 while (strncmp (q, mdswitches[i].str, mdswitches[i].len) != 0
8250 || strchr (" /", q[mdswitches[i].len]) == NULL)
8252 while (*q != ' ' && *q != '/' && *q != '\0')
8253 q++;
8254 if (*q != '/')
8255 break;
8256 q++;
8259 if (*q != ' ' && *q != '\0')
8261 while (*r != ' ' && *r != '\0')
8263 q = r;
8264 while (*q != ' ' && *q != '/' && *q != '\0')
8265 q++;
8267 if (used_arg (r, q - r))
8268 break;
8270 if (*q != '/')
8272 mswitches[n_mswitches].str = mdswitches[i].str;
8273 mswitches[n_mswitches].len = mdswitches[i].len;
8274 mswitches[n_mswitches].replace = (char *) 0;
8275 mswitches[n_mswitches].rep_len = 0;
8276 n_mswitches++;
8277 break;
8280 r = q + 1;
8282 break;
8288 for (i = 0; i < n_mswitches; i++)
8289 if (len == mswitches[i].len && ! strncmp (p, mswitches[i].str, len))
8290 return 1;
8292 return 0;
8295 static int
8296 default_arg (const char *p, int len)
8298 int i;
8300 for (i = 0; i < n_mdswitches; i++)
8301 if (len == mdswitches[i].len && ! strncmp (p, mdswitches[i].str, len))
8302 return 1;
8304 return 0;
8307 /* Work out the subdirectory to use based on the options. The format of
8308 multilib_select is a list of elements. Each element is a subdirectory
8309 name followed by a list of options followed by a semicolon. The format
8310 of multilib_exclusions is the same, but without the preceding
8311 directory. First gcc will check the exclusions, if none of the options
8312 beginning with an exclamation point are present, and all of the other
8313 options are present, then we will ignore this completely. Passing
8314 that, gcc will consider each multilib_select in turn using the same
8315 rules for matching the options. If a match is found, that subdirectory
8316 will be used.
8317 A subdirectory name is optionally followed by a colon and the corresponding
8318 multiarch name. */
8320 static void
8321 set_multilib_dir (void)
8323 const char *p;
8324 unsigned int this_path_len;
8325 const char *this_path, *this_arg;
8326 const char *start, *end;
8327 int not_arg;
8328 int ok, ndfltok, first;
8330 n_mdswitches = 0;
8331 start = multilib_defaults;
8332 while (*start == ' ' || *start == '\t')
8333 start++;
8334 while (*start != '\0')
8336 n_mdswitches++;
8337 while (*start != ' ' && *start != '\t' && *start != '\0')
8338 start++;
8339 while (*start == ' ' || *start == '\t')
8340 start++;
8343 if (n_mdswitches)
8345 int i = 0;
8347 mdswitches = XNEWVEC (struct mdswitchstr, n_mdswitches);
8348 for (start = multilib_defaults; *start != '\0'; start = end + 1)
8350 while (*start == ' ' || *start == '\t')
8351 start++;
8353 if (*start == '\0')
8354 break;
8356 for (end = start + 1;
8357 *end != ' ' && *end != '\t' && *end != '\0'; end++)
8360 obstack_grow (&multilib_obstack, start, end - start);
8361 obstack_1grow (&multilib_obstack, 0);
8362 mdswitches[i].str = XOBFINISH (&multilib_obstack, const char *);
8363 mdswitches[i++].len = end - start;
8365 if (*end == '\0')
8366 break;
8370 p = multilib_exclusions;
8371 while (*p != '\0')
8373 /* Ignore newlines. */
8374 if (*p == '\n')
8376 ++p;
8377 continue;
8380 /* Check the arguments. */
8381 ok = 1;
8382 while (*p != ';')
8384 if (*p == '\0')
8386 invalid_exclusions:
8387 fatal_error (input_location, "multilib exclusions %qs is invalid",
8388 multilib_exclusions);
8391 if (! ok)
8393 ++p;
8394 continue;
8397 this_arg = p;
8398 while (*p != ' ' && *p != ';')
8400 if (*p == '\0')
8401 goto invalid_exclusions;
8402 ++p;
8405 if (*this_arg != '!')
8406 not_arg = 0;
8407 else
8409 not_arg = 1;
8410 ++this_arg;
8413 ok = used_arg (this_arg, p - this_arg);
8414 if (not_arg)
8415 ok = ! ok;
8417 if (*p == ' ')
8418 ++p;
8421 if (ok)
8422 return;
8424 ++p;
8427 first = 1;
8428 p = multilib_select;
8430 /* Append multilib reuse rules if any. With those rules, we can reuse
8431 one multilib for certain different options sets. */
8432 if (strlen (multilib_reuse) > 0)
8433 p = concat (p, multilib_reuse, NULL);
8435 while (*p != '\0')
8437 /* Ignore newlines. */
8438 if (*p == '\n')
8440 ++p;
8441 continue;
8444 /* Get the initial path. */
8445 this_path = p;
8446 while (*p != ' ')
8448 if (*p == '\0')
8450 invalid_select:
8451 fatal_error (input_location, "multilib select %qs %qs is invalid",
8452 multilib_select, multilib_reuse);
8454 ++p;
8456 this_path_len = p - this_path;
8458 /* Check the arguments. */
8459 ok = 1;
8460 ndfltok = 1;
8461 ++p;
8462 while (*p != ';')
8464 if (*p == '\0')
8465 goto invalid_select;
8467 if (! ok)
8469 ++p;
8470 continue;
8473 this_arg = p;
8474 while (*p != ' ' && *p != ';')
8476 if (*p == '\0')
8477 goto invalid_select;
8478 ++p;
8481 if (*this_arg != '!')
8482 not_arg = 0;
8483 else
8485 not_arg = 1;
8486 ++this_arg;
8489 /* If this is a default argument, we can just ignore it.
8490 This is true even if this_arg begins with '!'. Beginning
8491 with '!' does not mean that this argument is necessarily
8492 inappropriate for this library: it merely means that
8493 there is a more specific library which uses this
8494 argument. If this argument is a default, we need not
8495 consider that more specific library. */
8496 ok = used_arg (this_arg, p - this_arg);
8497 if (not_arg)
8498 ok = ! ok;
8500 if (! ok)
8501 ndfltok = 0;
8503 if (default_arg (this_arg, p - this_arg))
8504 ok = 1;
8506 if (*p == ' ')
8507 ++p;
8510 if (ok && first)
8512 if (this_path_len != 1
8513 || this_path[0] != '.')
8515 char *new_multilib_dir = XNEWVEC (char, this_path_len + 1);
8516 char *q;
8518 strncpy (new_multilib_dir, this_path, this_path_len);
8519 new_multilib_dir[this_path_len] = '\0';
8520 q = strchr (new_multilib_dir, ':');
8521 if (q != NULL)
8522 *q = '\0';
8523 multilib_dir = new_multilib_dir;
8525 first = 0;
8528 if (ndfltok)
8530 const char *q = this_path, *end = this_path + this_path_len;
8532 while (q < end && *q != ':')
8533 q++;
8534 if (q < end)
8536 const char *q2 = q + 1, *ml_end = end;
8537 char *new_multilib_os_dir;
8539 while (q2 < end && *q2 != ':')
8540 q2++;
8541 if (*q2 == ':')
8542 ml_end = q2;
8543 if (ml_end - q == 1)
8544 multilib_os_dir = xstrdup (".");
8545 else
8547 new_multilib_os_dir = XNEWVEC (char, ml_end - q);
8548 memcpy (new_multilib_os_dir, q + 1, ml_end - q - 1);
8549 new_multilib_os_dir[ml_end - q - 1] = '\0';
8550 multilib_os_dir = new_multilib_os_dir;
8553 if (q2 < end && *q2 == ':')
8555 char *new_multiarch_dir = XNEWVEC (char, end - q2);
8556 memcpy (new_multiarch_dir, q2 + 1, end - q2 - 1);
8557 new_multiarch_dir[end - q2 - 1] = '\0';
8558 multiarch_dir = new_multiarch_dir;
8560 break;
8564 ++p;
8567 if (multilib_dir == NULL && multilib_os_dir != NULL
8568 && strcmp (multilib_os_dir, ".") == 0)
8570 free (CONST_CAST (char *, multilib_os_dir));
8571 multilib_os_dir = NULL;
8573 else if (multilib_dir != NULL && multilib_os_dir == NULL)
8574 multilib_os_dir = multilib_dir;
8577 /* Print out the multiple library subdirectory selection
8578 information. This prints out a series of lines. Each line looks
8579 like SUBDIRECTORY;@OPTION@OPTION, with as many options as is
8580 required. Only the desired options are printed out, the negative
8581 matches. The options are print without a leading dash. There are
8582 no spaces to make it easy to use the information in the shell.
8583 Each subdirectory is printed only once. This assumes the ordering
8584 generated by the genmultilib script. Also, we leave out ones that match
8585 the exclusions. */
8587 static void
8588 print_multilib_info (void)
8590 const char *p = multilib_select;
8591 const char *last_path = 0, *this_path;
8592 int skip;
8593 unsigned int last_path_len = 0;
8595 while (*p != '\0')
8597 skip = 0;
8598 /* Ignore newlines. */
8599 if (*p == '\n')
8601 ++p;
8602 continue;
8605 /* Get the initial path. */
8606 this_path = p;
8607 while (*p != ' ')
8609 if (*p == '\0')
8611 invalid_select:
8612 fatal_error (input_location,
8613 "multilib select %qs is invalid", multilib_select);
8616 ++p;
8619 /* When --disable-multilib was used but target defines
8620 MULTILIB_OSDIRNAMES, entries starting with .: (and not starting
8621 with .:: for multiarch configurations) are there just to find
8622 multilib_os_dir, so skip them from output. */
8623 if (this_path[0] == '.' && this_path[1] == ':' && this_path[2] != ':')
8624 skip = 1;
8626 /* Check for matches with the multilib_exclusions. We don't bother
8627 with the '!' in either list. If any of the exclusion rules match
8628 all of its options with the select rule, we skip it. */
8630 const char *e = multilib_exclusions;
8631 const char *this_arg;
8633 while (*e != '\0')
8635 int m = 1;
8636 /* Ignore newlines. */
8637 if (*e == '\n')
8639 ++e;
8640 continue;
8643 /* Check the arguments. */
8644 while (*e != ';')
8646 const char *q;
8647 int mp = 0;
8649 if (*e == '\0')
8651 invalid_exclusion:
8652 fatal_error (input_location,
8653 "multilib exclusion %qs is invalid",
8654 multilib_exclusions);
8657 if (! m)
8659 ++e;
8660 continue;
8663 this_arg = e;
8665 while (*e != ' ' && *e != ';')
8667 if (*e == '\0')
8668 goto invalid_exclusion;
8669 ++e;
8672 q = p + 1;
8673 while (*q != ';')
8675 const char *arg;
8676 int len = e - this_arg;
8678 if (*q == '\0')
8679 goto invalid_select;
8681 arg = q;
8683 while (*q != ' ' && *q != ';')
8685 if (*q == '\0')
8686 goto invalid_select;
8687 ++q;
8690 if (! strncmp (arg, this_arg,
8691 (len < q - arg) ? q - arg : len)
8692 || default_arg (this_arg, e - this_arg))
8694 mp = 1;
8695 break;
8698 if (*q == ' ')
8699 ++q;
8702 if (! mp)
8703 m = 0;
8705 if (*e == ' ')
8706 ++e;
8709 if (m)
8711 skip = 1;
8712 break;
8715 if (*e != '\0')
8716 ++e;
8720 if (! skip)
8722 /* If this is a duplicate, skip it. */
8723 skip = (last_path != 0
8724 && (unsigned int) (p - this_path) == last_path_len
8725 && ! filename_ncmp (last_path, this_path, last_path_len));
8727 last_path = this_path;
8728 last_path_len = p - this_path;
8731 /* If this directory requires any default arguments, we can skip
8732 it. We will already have printed a directory identical to
8733 this one which does not require that default argument. */
8734 if (! skip)
8736 const char *q;
8738 q = p + 1;
8739 while (*q != ';')
8741 const char *arg;
8743 if (*q == '\0')
8744 goto invalid_select;
8746 if (*q == '!')
8747 arg = NULL;
8748 else
8749 arg = q;
8751 while (*q != ' ' && *q != ';')
8753 if (*q == '\0')
8754 goto invalid_select;
8755 ++q;
8758 if (arg != NULL
8759 && default_arg (arg, q - arg))
8761 skip = 1;
8762 break;
8765 if (*q == ' ')
8766 ++q;
8770 if (! skip)
8772 const char *p1;
8774 for (p1 = last_path; p1 < p && *p1 != ':'; p1++)
8775 putchar (*p1);
8776 putchar (';');
8779 ++p;
8780 while (*p != ';')
8782 int use_arg;
8784 if (*p == '\0')
8785 goto invalid_select;
8787 if (skip)
8789 ++p;
8790 continue;
8793 use_arg = *p != '!';
8795 if (use_arg)
8796 putchar ('@');
8798 while (*p != ' ' && *p != ';')
8800 if (*p == '\0')
8801 goto invalid_select;
8802 if (use_arg)
8803 putchar (*p);
8804 ++p;
8807 if (*p == ' ')
8808 ++p;
8811 if (! skip)
8813 /* If there are extra options, print them now. */
8814 if (multilib_extra && *multilib_extra)
8816 int print_at = TRUE;
8817 const char *q;
8819 for (q = multilib_extra; *q != '\0'; q++)
8821 if (*q == ' ')
8822 print_at = TRUE;
8823 else
8825 if (print_at)
8826 putchar ('@');
8827 putchar (*q);
8828 print_at = FALSE;
8833 putchar ('\n');
8836 ++p;
8840 /* getenv built-in spec function.
8842 Returns the value of the environment variable given by its first
8843 argument, concatenated with the second argument. If the
8844 environment variable is not defined, a fatal error is issued. */
8846 static const char *
8847 getenv_spec_function (int argc, const char **argv)
8849 char *value;
8850 char *result;
8851 char *ptr;
8852 size_t len;
8854 if (argc != 2)
8855 return NULL;
8857 value = getenv (argv[0]);
8858 if (!value)
8859 fatal_error (input_location,
8860 "environment variable %qs not defined", argv[0]);
8862 /* We have to escape every character of the environment variable so
8863 they are not interpreted as active spec characters. A
8864 particularly painful case is when we are reading a variable
8865 holding a windows path complete with \ separators. */
8866 len = strlen (value) * 2 + strlen (argv[1]) + 1;
8867 result = XNEWVAR (char, len);
8868 for (ptr = result; *value; ptr += 2)
8870 ptr[0] = '\\';
8871 ptr[1] = *value++;
8874 strcpy (ptr, argv[1]);
8876 return result;
8879 /* if-exists built-in spec function.
8881 Checks to see if the file specified by the absolute pathname in
8882 ARGS exists. Returns that pathname if found.
8884 The usual use for this function is to check for a library file
8885 (whose name has been expanded with %s). */
8887 static const char *
8888 if_exists_spec_function (int argc, const char **argv)
8890 /* Must have only one argument. */
8891 if (argc == 1 && IS_ABSOLUTE_PATH (argv[0]) && ! access (argv[0], R_OK))
8892 return argv[0];
8894 return NULL;
8897 /* if-exists-else built-in spec function.
8899 This is like if-exists, but takes an additional argument which
8900 is returned if the first argument does not exist. */
8902 static const char *
8903 if_exists_else_spec_function (int argc, const char **argv)
8905 /* Must have exactly two arguments. */
8906 if (argc != 2)
8907 return NULL;
8909 if (IS_ABSOLUTE_PATH (argv[0]) && ! access (argv[0], R_OK))
8910 return argv[0];
8912 return argv[1];
8915 /* sanitize built-in spec function.
8917 This returns non-NULL, if sanitizing address, thread or
8918 any of the undefined behavior sanitizers. */
8920 static const char *
8921 sanitize_spec_function (int argc, const char **argv)
8923 if (argc != 1)
8924 return NULL;
8926 if (strcmp (argv[0], "address") == 0)
8927 return (flag_sanitize & SANITIZE_USER_ADDRESS) ? "" : NULL;
8928 if (strcmp (argv[0], "kernel-address") == 0)
8929 return (flag_sanitize & SANITIZE_KERNEL_ADDRESS) ? "" : NULL;
8930 if (strcmp (argv[0], "thread") == 0)
8931 return (flag_sanitize & SANITIZE_THREAD) ? "" : NULL;
8932 if (strcmp (argv[0], "undefined") == 0)
8933 return ((flag_sanitize & (SANITIZE_UNDEFINED | SANITIZE_NONDEFAULT))
8934 && !flag_sanitize_undefined_trap_on_error) ? "" : NULL;
8935 if (strcmp (argv[0], "leak") == 0)
8936 return ((flag_sanitize
8937 & (SANITIZE_ADDRESS | SANITIZE_LEAK | SANITIZE_THREAD))
8938 == SANITIZE_LEAK) ? "" : NULL;
8939 return NULL;
8942 /* replace-outfile built-in spec function.
8944 This looks for the first argument in the outfiles array's name and
8945 replaces it with the second argument. */
8947 static const char *
8948 replace_outfile_spec_function (int argc, const char **argv)
8950 int i;
8951 /* Must have exactly two arguments. */
8952 if (argc != 2)
8953 abort ();
8955 for (i = 0; i < n_infiles; i++)
8957 if (outfiles[i] && !filename_cmp (outfiles[i], argv[0]))
8958 outfiles[i] = xstrdup (argv[1]);
8960 return NULL;
8963 /* remove-outfile built-in spec function.
8965 * This looks for the first argument in the outfiles array's name and
8966 * removes it. */
8968 static const char *
8969 remove_outfile_spec_function (int argc, const char **argv)
8971 int i;
8972 /* Must have exactly one argument. */
8973 if (argc != 1)
8974 abort ();
8976 for (i = 0; i < n_infiles; i++)
8978 if (outfiles[i] && !filename_cmp (outfiles[i], argv[0]))
8979 outfiles[i] = NULL;
8981 return NULL;
8984 /* Given two version numbers, compares the two numbers.
8985 A version number must match the regular expression
8986 ([1-9][0-9]*|0)(\.([1-9][0-9]*|0))*
8988 static int
8989 compare_version_strings (const char *v1, const char *v2)
8991 int rresult;
8992 regex_t r;
8994 if (regcomp (&r, "^([1-9][0-9]*|0)(\\.([1-9][0-9]*|0))*$",
8995 REG_EXTENDED | REG_NOSUB) != 0)
8996 abort ();
8997 rresult = regexec (&r, v1, 0, NULL, 0);
8998 if (rresult == REG_NOMATCH)
8999 fatal_error (input_location, "invalid version number %qs", v1);
9000 else if (rresult != 0)
9001 abort ();
9002 rresult = regexec (&r, v2, 0, NULL, 0);
9003 if (rresult == REG_NOMATCH)
9004 fatal_error (input_location, "invalid version number %qs", v2);
9005 else if (rresult != 0)
9006 abort ();
9008 return strverscmp (v1, v2);
9012 /* version_compare built-in spec function.
9014 This takes an argument of the following form:
9016 <comparison-op> <arg1> [<arg2>] <switch> <result>
9018 and produces "result" if the comparison evaluates to true,
9019 and nothing if it doesn't.
9021 The supported <comparison-op> values are:
9023 >= true if switch is a later (or same) version than arg1
9024 !> opposite of >=
9025 < true if switch is an earlier version than arg1
9026 !< opposite of <
9027 >< true if switch is arg1 or later, and earlier than arg2
9028 <> true if switch is earlier than arg1 or is arg2 or later
9030 If the switch is not present, the condition is false unless
9031 the first character of the <comparison-op> is '!'.
9033 For example,
9034 %:version-compare(>= 10.3 mmacosx-version-min= -lmx)
9035 adds -lmx if -mmacosx-version-min=10.3.9 was passed. */
9037 static const char *
9038 version_compare_spec_function (int argc, const char **argv)
9040 int comp1, comp2;
9041 size_t switch_len;
9042 const char *switch_value = NULL;
9043 int nargs = 1, i;
9044 bool result;
9046 if (argc < 3)
9047 fatal_error (input_location, "too few arguments to %%:version-compare");
9048 if (argv[0][0] == '\0')
9049 abort ();
9050 if ((argv[0][1] == '<' || argv[0][1] == '>') && argv[0][0] != '!')
9051 nargs = 2;
9052 if (argc != nargs + 3)
9053 fatal_error (input_location, "too many arguments to %%:version-compare");
9055 switch_len = strlen (argv[nargs + 1]);
9056 for (i = 0; i < n_switches; i++)
9057 if (!strncmp (switches[i].part1, argv[nargs + 1], switch_len)
9058 && check_live_switch (i, switch_len))
9059 switch_value = switches[i].part1 + switch_len;
9061 if (switch_value == NULL)
9062 comp1 = comp2 = -1;
9063 else
9065 comp1 = compare_version_strings (switch_value, argv[1]);
9066 if (nargs == 2)
9067 comp2 = compare_version_strings (switch_value, argv[2]);
9068 else
9069 comp2 = -1; /* This value unused. */
9072 switch (argv[0][0] << 8 | argv[0][1])
9074 case '>' << 8 | '=':
9075 result = comp1 >= 0;
9076 break;
9077 case '!' << 8 | '<':
9078 result = comp1 >= 0 || switch_value == NULL;
9079 break;
9080 case '<' << 8:
9081 result = comp1 < 0;
9082 break;
9083 case '!' << 8 | '>':
9084 result = comp1 < 0 || switch_value == NULL;
9085 break;
9086 case '>' << 8 | '<':
9087 result = comp1 >= 0 && comp2 < 0;
9088 break;
9089 case '<' << 8 | '>':
9090 result = comp1 < 0 || comp2 >= 0;
9091 break;
9093 default:
9094 fatal_error (input_location,
9095 "unknown operator %qs in %%:version-compare", argv[0]);
9097 if (! result)
9098 return NULL;
9100 return argv[nargs + 2];
9103 /* %:include builtin spec function. This differs from %include in that it
9104 can be nested inside a spec, and thus be conditionalized. It takes
9105 one argument, the filename, and looks for it in the startfile path.
9106 The result is always NULL, i.e. an empty expansion. */
9108 static const char *
9109 include_spec_function (int argc, const char **argv)
9111 char *file;
9113 if (argc != 1)
9114 abort ();
9116 file = find_a_file (&startfile_prefixes, argv[0], R_OK, true);
9117 read_specs (file ? file : argv[0], false, false);
9119 return NULL;
9122 /* %:find-file spec function. This function replaces its argument by
9123 the file found through find_file, that is the -print-file-name gcc
9124 program option. */
9125 static const char *
9126 find_file_spec_function (int argc, const char **argv)
9128 const char *file;
9130 if (argc != 1)
9131 abort ();
9133 file = find_file (argv[0]);
9134 return file;
9138 /* %:find-plugindir spec function. This function replaces its argument
9139 by the -iplugindir=<dir> option. `dir' is found through find_file, that
9140 is the -print-file-name gcc program option. */
9141 static const char *
9142 find_plugindir_spec_function (int argc, const char **argv ATTRIBUTE_UNUSED)
9144 const char *option;
9146 if (argc != 0)
9147 abort ();
9149 option = concat ("-iplugindir=", find_file ("plugin"), NULL);
9150 return option;
9154 /* %:print-asm-header spec function. Print a banner to say that the
9155 following output is from the assembler. */
9157 static const char *
9158 print_asm_header_spec_function (int arg ATTRIBUTE_UNUSED,
9159 const char **argv ATTRIBUTE_UNUSED)
9161 printf (_("Assembler options\n=================\n\n"));
9162 printf (_("Use \"-Wa,OPTION\" to pass \"OPTION\" to the assembler.\n\n"));
9163 fflush (stdout);
9164 return NULL;
9167 /* Get a random number for -frandom-seed */
9169 static unsigned HOST_WIDE_INT
9170 get_random_number (void)
9172 unsigned HOST_WIDE_INT ret = 0;
9173 int fd;
9175 fd = open ("/dev/urandom", O_RDONLY);
9176 if (fd >= 0)
9178 read (fd, &ret, sizeof (HOST_WIDE_INT));
9179 close (fd);
9180 if (ret)
9181 return ret;
9184 /* Get some more or less random data. */
9185 #ifdef HAVE_GETTIMEOFDAY
9187 struct timeval tv;
9189 gettimeofday (&tv, NULL);
9190 ret = tv.tv_sec * 1000 + tv.tv_usec / 1000;
9192 #else
9194 time_t now = time (NULL);
9196 if (now != (time_t)-1)
9197 ret = (unsigned) now;
9199 #endif
9201 return ret ^ getpid ();
9204 /* %:compare-debug-dump-opt spec function. Save the last argument,
9205 expected to be the last -fdump-final-insns option, or generate a
9206 temporary. */
9208 static const char *
9209 compare_debug_dump_opt_spec_function (int arg,
9210 const char **argv ATTRIBUTE_UNUSED)
9212 char *ret;
9213 char *name;
9214 int which;
9215 static char random_seed[HOST_BITS_PER_WIDE_INT / 4 + 3];
9217 if (arg != 0)
9218 fatal_error (input_location,
9219 "too many arguments to %%:compare-debug-dump-opt");
9221 do_spec_2 ("%{fdump-final-insns=*:%*}");
9222 do_spec_1 (" ", 0, NULL);
9224 if (argbuf.length () > 0
9225 && strcmp (argv[argbuf.length () - 1], "."))
9227 if (!compare_debug)
9228 return NULL;
9230 name = xstrdup (argv[argbuf.length () - 1]);
9231 ret = NULL;
9233 else
9235 const char *ext = NULL;
9237 if (argbuf.length () > 0)
9239 do_spec_2 ("%{o*:%*}%{!o:%{!S:%b%O}%{S:%b.s}}");
9240 ext = ".gkd";
9242 else if (!compare_debug)
9243 return NULL;
9244 else
9245 do_spec_2 ("%g.gkd");
9247 do_spec_1 (" ", 0, NULL);
9249 gcc_assert (argbuf.length () > 0);
9251 name = concat (argbuf.last (), ext, NULL);
9253 ret = concat ("-fdump-final-insns=", name, NULL);
9256 which = compare_debug < 0;
9257 debug_check_temp_file[which] = name;
9259 if (!which)
9261 unsigned HOST_WIDE_INT value = get_random_number ();
9263 sprintf (random_seed, HOST_WIDE_INT_PRINT_HEX, value);
9266 if (*random_seed)
9268 char *tmp = ret;
9269 ret = concat ("%{!frandom-seed=*:-frandom-seed=", random_seed, "} ",
9270 ret, NULL);
9271 free (tmp);
9274 if (which)
9275 *random_seed = 0;
9277 return ret;
9280 static const char *debug_auxbase_opt;
9282 /* %:compare-debug-self-opt spec function. Expands to the options
9283 that are to be passed in the second compilation of
9284 compare-debug. */
9286 static const char *
9287 compare_debug_self_opt_spec_function (int arg,
9288 const char **argv ATTRIBUTE_UNUSED)
9290 if (arg != 0)
9291 fatal_error (input_location,
9292 "too many arguments to %%:compare-debug-self-opt");
9294 if (compare_debug >= 0)
9295 return NULL;
9297 do_spec_2 ("%{c|S:%{o*:%*}}");
9298 do_spec_1 (" ", 0, NULL);
9300 if (argbuf.length () > 0)
9301 debug_auxbase_opt = concat ("-auxbase-strip ",
9302 argbuf.last (),
9303 NULL);
9304 else
9305 debug_auxbase_opt = NULL;
9307 return concat ("\
9308 %<o %<MD %<MMD %<MF* %<MG %<MP %<MQ* %<MT* \
9309 %<fdump-final-insns=* -w -S -o %j \
9310 %{!fcompare-debug-second:-fcompare-debug-second} \
9311 ", compare_debug_opt, NULL);
9314 /* %:compare-debug-auxbase-opt spec function. Expands to the auxbase
9315 options that are to be passed in the second compilation of
9316 compare-debug. It expects, as an argument, the basename of the
9317 current input file name, with the .gk suffix appended to it. */
9319 static const char *
9320 compare_debug_auxbase_opt_spec_function (int arg,
9321 const char **argv)
9323 char *name;
9324 int len;
9326 if (arg == 0)
9327 fatal_error (input_location,
9328 "too few arguments to %%:compare-debug-auxbase-opt");
9330 if (arg != 1)
9331 fatal_error (input_location,
9332 "too many arguments to %%:compare-debug-auxbase-opt");
9334 if (compare_debug >= 0)
9335 return NULL;
9337 len = strlen (argv[0]);
9338 if (len < 3 || strcmp (argv[0] + len - 3, ".gk") != 0)
9339 fatal_error (input_location, "argument to %%:compare-debug-auxbase-opt "
9340 "does not end in .gk");
9342 if (debug_auxbase_opt)
9343 return debug_auxbase_opt;
9345 #define OPT "-auxbase "
9347 len -= 3;
9348 name = (char*) xmalloc (sizeof (OPT) + len);
9349 memcpy (name, OPT, sizeof (OPT) - 1);
9350 memcpy (name + sizeof (OPT) - 1, argv[0], len);
9351 name[sizeof (OPT) - 1 + len] = '\0';
9353 #undef OPT
9355 return name;
9358 /* %:pass-through-libs spec function. Finds all -l options and input
9359 file names in the lib spec passed to it, and makes a list of them
9360 prepended with the plugin option to cause them to be passed through
9361 to the final link after all the new object files have been added. */
9363 const char *
9364 pass_through_libs_spec_func (int argc, const char **argv)
9366 char *prepended = xstrdup (" ");
9367 int n;
9368 /* Shlemiel the painter's algorithm. Innately horrible, but at least
9369 we know that there will never be more than a handful of strings to
9370 concat, and it's only once per run, so it's not worth optimising. */
9371 for (n = 0; n < argc; n++)
9373 char *old = prepended;
9374 /* Anything that isn't an option is a full path to an output
9375 file; pass it through if it ends in '.a'. Among options,
9376 pass only -l. */
9377 if (argv[n][0] == '-' && argv[n][1] == 'l')
9379 const char *lopt = argv[n] + 2;
9380 /* Handle both joined and non-joined -l options. If for any
9381 reason there's a trailing -l with no joined or following
9382 arg just discard it. */
9383 if (!*lopt && ++n >= argc)
9384 break;
9385 else if (!*lopt)
9386 lopt = argv[n];
9387 prepended = concat (prepended, "-plugin-opt=-pass-through=-l",
9388 lopt, " ", NULL);
9390 else if (!strcmp (".a", argv[n] + strlen (argv[n]) - 2))
9392 prepended = concat (prepended, "-plugin-opt=-pass-through=",
9393 argv[n], " ", NULL);
9395 if (prepended != old)
9396 free (old);
9398 return prepended;
9401 /* %:replace-extension spec function. Replaces the extension of the
9402 first argument with the second argument. */
9404 const char *
9405 replace_extension_spec_func (int argc, const char **argv)
9407 char *name;
9408 char *p;
9409 char *result;
9410 int i;
9412 if (argc != 2)
9413 fatal_error (input_location, "too few arguments to %%:replace-extension");
9415 name = xstrdup (argv[0]);
9417 for (i = strlen (name) - 1; i >= 0; i--)
9418 if (IS_DIR_SEPARATOR (name[i]))
9419 break;
9421 p = strrchr (name + i + 1, '.');
9422 if (p != NULL)
9423 *p = '\0';
9425 result = concat (name, argv[1], NULL);
9427 free (name);
9428 return result;
9431 /* Insert backslash before spaces in ORIG (usually a file path), to
9432 avoid being broken by spec parser.
9434 This function is needed as do_spec_1 treats white space (' ' and '\t')
9435 as the end of an argument. But in case of -plugin /usr/gcc install/xxx.so,
9436 the file name should be treated as a single argument rather than being
9437 broken into multiple. Solution is to insert '\\' before the space in a
9438 file name.
9440 This function converts and only converts all occurrence of ' '
9441 to '\\' + ' ' and '\t' to '\\' + '\t'. For example:
9442 "a b" -> "a\\ b"
9443 "a b" -> "a\\ \\ b"
9444 "a\tb" -> "a\\\tb"
9445 "a\\ b" -> "a\\\\ b"
9447 orig: input null-terminating string that was allocated by xalloc. The
9448 memory it points to might be freed in this function. Behavior undefined
9449 if ORIG wasn't xalloced or was freed already at entry.
9451 Return: ORIG if no conversion needed. Otherwise a newly allocated string
9452 that was converted from ORIG. */
9454 static char *
9455 convert_white_space (char *orig)
9457 int len, number_of_space = 0;
9459 for (len = 0; orig[len]; len++)
9460 if (orig[len] == ' ' || orig[len] == '\t') number_of_space++;
9462 if (number_of_space)
9464 char *new_spec = (char *) xmalloc (len + number_of_space + 1);
9465 int j, k;
9466 for (j = 0, k = 0; j <= len; j++, k++)
9468 if (orig[j] == ' ' || orig[j] == '\t')
9469 new_spec[k++] = '\\';
9470 new_spec[k] = orig[j];
9472 free (orig);
9473 return new_spec;
9475 else
9476 return orig;
9479 /* PR jit/64810.
9480 Targets can provide configure-time default options in
9481 OPTION_DEFAULT_SPECS. The jit needs to access these, but
9482 they are expressed in the spec language.
9484 Run just enough of the driver to be able to expand these
9485 specs, and then call the callback CB on each
9486 such option. The options strings are *without* a leading
9487 '-' character e.g. ("march=x86-64"). Finally, clean up. */
9489 void
9490 driver_get_configure_time_options (void (*cb) (const char *option,
9491 void *user_data),
9492 void *user_data)
9494 size_t i;
9496 obstack_init (&obstack);
9497 gcc_obstack_init (&opts_obstack);
9498 n_switches = 0;
9500 for (i = 0; i < ARRAY_SIZE (option_default_specs); i++)
9501 do_option_spec (option_default_specs[i].name,
9502 option_default_specs[i].spec);
9504 for (i = 0; (int) i < n_switches; i++)
9506 gcc_assert (switches[i].part1);
9507 (*cb) (switches[i].part1, user_data);
9510 obstack_free (&opts_obstack, NULL);
9511 obstack_free (&obstack, NULL);
9512 n_switches = 0;