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comparison gcc/c-opts.c @ 0:a06113de4d67

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first commit
author kent <kent@cr.ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2009 14:47:48 +0900
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children 77e2b8dfacca
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-1:000000000000 0:a06113de4d67
1 /* C/ObjC/C++ command line option handling.
2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
3 Free Software Foundation, Inc.
4 Contributed by Neil Booth.
5
6 This file is part of GCC.
7
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
11 version.
12
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
21
22 #include "config.h"
23 #include "system.h"
24 #include "coretypes.h"
25 #include "tm.h"
26 #include "tree.h"
27 #include "c-common.h"
28 #include "c-pragma.h"
29 #include "flags.h"
30 #include "toplev.h"
31 #include "langhooks.h"
32 #include "tree-inline.h"
33 #include "diagnostic.h"
34 #include "intl.h"
35 #include "cppdefault.h"
36 #include "incpath.h"
37 #include "debug.h" /* For debug_hooks. */
38 #include "opts.h"
39 #include "options.h"
40 #include "mkdeps.h"
41 #include "target.h"
42 #include "tm_p.h"
43
44 #ifndef DOLLARS_IN_IDENTIFIERS
45 # define DOLLARS_IN_IDENTIFIERS true
46 #endif
47
48 #ifndef TARGET_SYSTEM_ROOT
49 # define TARGET_SYSTEM_ROOT NULL
50 #endif
51
52 #ifndef TARGET_OPTF
53 #define TARGET_OPTF(ARG)
54 #endif
55
56 /* CPP's options. */
57 cpp_options *cpp_opts;
58
59 /* Input filename. */
60 static const char *this_input_filename;
61
62 /* Filename and stream for preprocessed output. */
63 static const char *out_fname;
64 static FILE *out_stream;
65
66 /* Append dependencies to deps_file. */
67 static bool deps_append;
68
69 /* If dependency switches (-MF etc.) have been given. */
70 static bool deps_seen;
71
72 /* If -v seen. */
73 static bool verbose;
74
75 /* Dependency output file. */
76 static const char *deps_file;
77
78 /* The prefix given by -iprefix, if any. */
79 static const char *iprefix;
80
81 /* The multilib directory given by -imultilib, if any. */
82 static const char *imultilib;
83
84 /* The system root, if any. Overridden by -isysroot. */
85 static const char *sysroot = TARGET_SYSTEM_ROOT;
86
87 /* Zero disables all standard directories for headers. */
88 static bool std_inc = true;
89
90 /* Zero disables the C++-specific standard directories for headers. */
91 static bool std_cxx_inc = true;
92
93 /* If the quote chain has been split by -I-. */
94 static bool quote_chain_split;
95
96 /* If -Wunused-macros. */
97 static bool warn_unused_macros;
98
99 /* If -Wvariadic-macros. */
100 static bool warn_variadic_macros = true;
101
102 /* Number of deferred options. */
103 static size_t deferred_count;
104
105 /* Number of deferred options scanned for -include. */
106 static size_t include_cursor;
107
108 static void set_Wimplicit (int);
109 static void handle_OPT_d (const char *);
110 static void set_std_cxx98 (int);
111 static void set_std_cxx0x (int);
112 static void set_std_c89 (int, int);
113 static void set_std_c99 (int);
114 static void check_deps_environment_vars (void);
115 static void handle_deferred_opts (void);
116 static void sanitize_cpp_opts (void);
117 static void add_prefixed_path (const char *, size_t);
118 static void push_command_line_include (void);
119 static void cb_file_change (cpp_reader *, const struct line_map *);
120 static void cb_dir_change (cpp_reader *, const char *);
121 static void finish_options (void);
122
123 #ifndef STDC_0_IN_SYSTEM_HEADERS
124 #define STDC_0_IN_SYSTEM_HEADERS 0
125 #endif
126
127 /* Holds switches parsed by c_common_handle_option (), but whose
128 handling is deferred to c_common_post_options (). */
129 static void defer_opt (enum opt_code, const char *);
130 static struct deferred_opt
131 {
132 enum opt_code code;
133 const char *arg;
134 } *deferred_opts;
135
136 /* Complain that switch CODE expects an argument but none was
137 provided. OPT was the command-line option. Return FALSE to get
138 the default message in opts.c, TRUE if we provide a specialized
139 one. */
140 bool
141 c_common_missing_argument (const char *opt, size_t code)
142 {
143 switch (code)
144 {
145 default:
146 /* Pick up the default message. */
147 return false;
148
149 case OPT_fconstant_string_class_:
150 error ("no class name specified with %qs", opt);
151 break;
152
153 case OPT_A:
154 error ("assertion missing after %qs", opt);
155 break;
156
157 case OPT_D:
158 case OPT_U:
159 error ("macro name missing after %qs", opt);
160 break;
161
162 case OPT_F:
163 case OPT_I:
164 case OPT_idirafter:
165 case OPT_isysroot:
166 case OPT_isystem:
167 case OPT_iquote:
168 error ("missing path after %qs", opt);
169 break;
170
171 case OPT_MF:
172 case OPT_MD:
173 case OPT_MMD:
174 case OPT_include:
175 case OPT_imacros:
176 case OPT_o:
177 error ("missing filename after %qs", opt);
178 break;
179
180 case OPT_MQ:
181 case OPT_MT:
182 error ("missing makefile target after %qs", opt);
183 break;
184 }
185
186 return true;
187 }
188
189 /* Defer option CODE with argument ARG. */
190 static void
191 defer_opt (enum opt_code code, const char *arg)
192 {
193 deferred_opts[deferred_count].code = code;
194 deferred_opts[deferred_count].arg = arg;
195 deferred_count++;
196 }
197
198 /* Common initialization before parsing options. */
199 unsigned int
200 c_common_init_options (unsigned int argc, const char **argv)
201 {
202 static const unsigned int lang_flags[] = {CL_C, CL_ObjC, CL_CXX, CL_ObjCXX};
203 unsigned int i, result;
204
205 /* This is conditionalized only because that is the way the front
206 ends used to do it. Maybe this should be unconditional? */
207 if (c_dialect_cxx ())
208 {
209 /* By default wrap lines at 80 characters. Is getenv
210 ("COLUMNS") preferable? */
211 diagnostic_line_cutoff (global_dc) = 80;
212 /* By default, emit location information once for every
213 diagnostic message. */
214 diagnostic_prefixing_rule (global_dc) = DIAGNOSTICS_SHOW_PREFIX_ONCE;
215 }
216
217 parse_in = cpp_create_reader (c_dialect_cxx () ? CLK_GNUCXX: CLK_GNUC89,
218 ident_hash, line_table);
219
220 cpp_opts = cpp_get_options (parse_in);
221 cpp_opts->dollars_in_ident = DOLLARS_IN_IDENTIFIERS;
222 cpp_opts->objc = c_dialect_objc ();
223
224 /* Reset to avoid warnings on internal definitions. We set it just
225 before passing on command-line options to cpplib. */
226 cpp_opts->warn_dollars = 0;
227
228 flag_exceptions = c_dialect_cxx ();
229 warn_pointer_arith = c_dialect_cxx ();
230 warn_write_strings = c_dialect_cxx();
231
232 /* By default, C99-like requirements for complex multiply and divide. */
233 flag_complex_method = 2;
234
235 deferred_opts = XNEWVEC (struct deferred_opt, argc);
236
237 result = lang_flags[c_language];
238
239 if (c_language == clk_c)
240 {
241 /* If preprocessing assembly language, accept any of the C-family
242 front end options since the driver may pass them through. */
243 for (i = 1; i < argc; i++)
244 if (! strcmp (argv[i], "-lang-asm"))
245 {
246 result |= CL_C | CL_ObjC | CL_CXX | CL_ObjCXX;
247 break;
248 }
249 }
250
251 return result;
252 }
253
254 /* Handle switch SCODE with argument ARG. VALUE is true, unless no-
255 form of an -f or -W option was given. Returns 0 if the switch was
256 invalid, a negative number to prevent language-independent
257 processing in toplev.c (a hack necessary for the short-term). */
258 int
259 c_common_handle_option (size_t scode, const char *arg, int value)
260 {
261 const struct cl_option *option = &cl_options[scode];
262 enum opt_code code = (enum opt_code) scode;
263 int result = 1;
264
265 /* Prevent resetting the language standard to a C dialect when the driver
266 has already determined that we're looking at assembler input. */
267 bool preprocessing_asm_p = (cpp_get_options (parse_in)->lang == CLK_ASM);
268
269 switch (code)
270 {
271 default:
272 if (cl_options[code].flags & (CL_C | CL_CXX | CL_ObjC | CL_ObjCXX))
273 {
274 if ((option->flags & CL_TARGET)
275 && ! targetcm.handle_c_option (scode, arg, value))
276 result = 0;
277 break;
278 }
279 result = 0;
280 break;
281
282 case OPT__output_pch_:
283 pch_file = arg;
284 break;
285
286 case OPT_A:
287 defer_opt (code, arg);
288 break;
289
290 case OPT_C:
291 cpp_opts->discard_comments = 0;
292 break;
293
294 case OPT_CC:
295 cpp_opts->discard_comments = 0;
296 cpp_opts->discard_comments_in_macro_exp = 0;
297 break;
298
299 case OPT_D:
300 defer_opt (code, arg);
301 break;
302
303 case OPT_E:
304 flag_preprocess_only = 1;
305 break;
306
307 case OPT_H:
308 cpp_opts->print_include_names = 1;
309 break;
310
311 case OPT_F:
312 TARGET_OPTF (xstrdup (arg));
313 break;
314
315 case OPT_I:
316 if (strcmp (arg, "-"))
317 add_path (xstrdup (arg), BRACKET, 0, true);
318 else
319 {
320 if (quote_chain_split)
321 error ("-I- specified twice");
322 quote_chain_split = true;
323 split_quote_chain ();
324 inform (input_location, "obsolete option -I- used, please use -iquote instead");
325 }
326 break;
327
328 case OPT_M:
329 case OPT_MM:
330 /* When doing dependencies with -M or -MM, suppress normal
331 preprocessed output, but still do -dM etc. as software
332 depends on this. Preprocessed output does occur if -MD, -MMD
333 or environment var dependency generation is used. */
334 cpp_opts->deps.style = (code == OPT_M ? DEPS_SYSTEM: DEPS_USER);
335 flag_no_output = 1;
336 cpp_opts->inhibit_warnings = 1;
337 break;
338
339 case OPT_MD:
340 case OPT_MMD:
341 cpp_opts->deps.style = (code == OPT_MD ? DEPS_SYSTEM: DEPS_USER);
342 deps_file = arg;
343 break;
344
345 case OPT_MF:
346 deps_seen = true;
347 deps_file = arg;
348 break;
349
350 case OPT_MG:
351 deps_seen = true;
352 cpp_opts->deps.missing_files = true;
353 break;
354
355 case OPT_MP:
356 deps_seen = true;
357 cpp_opts->deps.phony_targets = true;
358 break;
359
360 case OPT_MQ:
361 case OPT_MT:
362 deps_seen = true;
363 defer_opt (code, arg);
364 break;
365
366 case OPT_P:
367 flag_no_line_commands = 1;
368 break;
369
370 case OPT_fworking_directory:
371 flag_working_directory = value;
372 break;
373
374 case OPT_U:
375 defer_opt (code, arg);
376 break;
377
378 case OPT_Wall:
379 warn_unused = value;
380 set_Wformat (value);
381 set_Wimplicit (value);
382 warn_char_subscripts = value;
383 warn_missing_braces = value;
384 warn_parentheses = value;
385 warn_return_type = value;
386 warn_sequence_point = value; /* Was C only. */
387 warn_switch = value;
388 if (warn_strict_aliasing == -1)
389 set_Wstrict_aliasing (value);
390 warn_address = value;
391 if (warn_strict_overflow == -1)
392 warn_strict_overflow = value;
393 warn_array_bounds = value;
394 warn_volatile_register_var = value;
395
396 /* Only warn about unknown pragmas that are not in system
397 headers. */
398 warn_unknown_pragmas = value;
399
400 /* We save the value of warn_uninitialized, since if they put
401 -Wuninitialized on the command line, we need to generate a
402 warning about not using it without also specifying -O. */
403 if (warn_uninitialized != 1)
404 warn_uninitialized = (value ? 2 : 0);
405
406 if (!c_dialect_cxx ())
407 {
408 /* We set this to 2 here, but 1 in -Wmain, so -ffreestanding
409 can turn it off only if it's not explicit. */
410 if (warn_main == -1)
411 warn_main = (value ? 2 : 0);
412 }
413 else
414 {
415 /* C++-specific warnings. */
416 warn_sign_compare = value;
417 warn_reorder = value;
418 warn_cxx0x_compat = value;
419 }
420
421 cpp_opts->warn_trigraphs = value;
422 cpp_opts->warn_comments = value;
423 cpp_opts->warn_num_sign_change = value;
424
425 if (warn_pointer_sign == -1)
426 warn_pointer_sign = value;
427 break;
428
429 case OPT_Wbuiltin_macro_redefined:
430 cpp_opts->warn_builtin_macro_redefined = value;
431 break;
432
433 case OPT_Wcomment:
434 case OPT_Wcomments:
435 cpp_opts->warn_comments = value;
436 break;
437
438 case OPT_Wdeprecated:
439 cpp_opts->warn_deprecated = value;
440 break;
441
442 case OPT_Wendif_labels:
443 cpp_opts->warn_endif_labels = value;
444 break;
445
446 case OPT_Werror:
447 cpp_opts->warnings_are_errors = value;
448 global_dc->warning_as_error_requested = value;
449 break;
450
451 case OPT_Werror_implicit_function_declaration:
452 /* For backward compatibility, this is the same as
453 -Werror=implicit-function-declaration. */
454 enable_warning_as_error ("implicit-function-declaration", value, CL_C | CL_ObjC);
455 break;
456
457 case OPT_Wformat:
458 set_Wformat (value);
459 break;
460
461 case OPT_Wformat_:
462 set_Wformat (atoi (arg));
463 break;
464
465 case OPT_Wimplicit:
466 set_Wimplicit (value);
467 break;
468
469 case OPT_Wimport:
470 /* Silently ignore for now. */
471 break;
472
473 case OPT_Winvalid_pch:
474 cpp_opts->warn_invalid_pch = value;
475 break;
476
477 case OPT_Wmissing_include_dirs:
478 cpp_opts->warn_missing_include_dirs = value;
479 break;
480
481 case OPT_Wmultichar:
482 cpp_opts->warn_multichar = value;
483 break;
484
485 case OPT_Wnormalized_:
486 if (!value || (arg && strcasecmp (arg, "none") == 0))
487 cpp_opts->warn_normalize = normalized_none;
488 else if (!arg || strcasecmp (arg, "nfkc") == 0)
489 cpp_opts->warn_normalize = normalized_KC;
490 else if (strcasecmp (arg, "id") == 0)
491 cpp_opts->warn_normalize = normalized_identifier_C;
492 else if (strcasecmp (arg, "nfc") == 0)
493 cpp_opts->warn_normalize = normalized_C;
494 else
495 error ("argument %qs to %<-Wnormalized%> not recognized", arg);
496 break;
497
498 case OPT_Wreturn_type:
499 warn_return_type = value;
500 break;
501
502 case OPT_Wstrict_null_sentinel:
503 warn_strict_null_sentinel = value;
504 break;
505
506 case OPT_Wsystem_headers:
507 cpp_opts->warn_system_headers = value;
508 break;
509
510 case OPT_Wtraditional:
511 cpp_opts->warn_traditional = value;
512 break;
513
514 case OPT_Wtrigraphs:
515 cpp_opts->warn_trigraphs = value;
516 break;
517
518 case OPT_Wundef:
519 cpp_opts->warn_undef = value;
520 break;
521
522 case OPT_Wunknown_pragmas:
523 /* Set to greater than 1, so that even unknown pragmas in
524 system headers will be warned about. */
525 warn_unknown_pragmas = value * 2;
526 break;
527
528 case OPT_Wunused_macros:
529 warn_unused_macros = value;
530 break;
531
532 case OPT_Wvariadic_macros:
533 warn_variadic_macros = value;
534 break;
535
536 case OPT_Wwrite_strings:
537 warn_write_strings = value;
538 break;
539
540 case OPT_Weffc__:
541 warn_ecpp = value;
542 if (value)
543 warn_nonvdtor = true;
544 break;
545
546 case OPT_ansi:
547 if (!c_dialect_cxx ())
548 set_std_c89 (false, true);
549 else
550 set_std_cxx98 (true);
551 break;
552
553 case OPT_d:
554 handle_OPT_d (arg);
555 break;
556
557 case OPT_fcond_mismatch:
558 if (!c_dialect_cxx ())
559 {
560 flag_cond_mismatch = value;
561 break;
562 }
563 /* Fall through. */
564
565 case OPT_fall_virtual:
566 case OPT_falt_external_templates:
567 case OPT_fenum_int_equiv:
568 case OPT_fexternal_templates:
569 case OPT_fguiding_decls:
570 case OPT_fhonor_std:
571 case OPT_fhuge_objects:
572 case OPT_flabels_ok:
573 case OPT_fname_mangling_version_:
574 case OPT_fnew_abi:
575 case OPT_fnonnull_objects:
576 case OPT_fsquangle:
577 case OPT_fstrict_prototype:
578 case OPT_fthis_is_variable:
579 case OPT_fvtable_thunks:
580 case OPT_fxref:
581 case OPT_fvtable_gc:
582 warning (0, "switch %qs is no longer supported", option->opt_text);
583 break;
584
585 case OPT_faccess_control:
586 flag_access_control = value;
587 break;
588
589 case OPT_fasm:
590 flag_no_asm = !value;
591 break;
592
593 case OPT_fbuiltin:
594 flag_no_builtin = !value;
595 break;
596
597 case OPT_fbuiltin_:
598 if (value)
599 result = 0;
600 else
601 disable_builtin_function (arg);
602 break;
603
604 case OPT_fdirectives_only:
605 cpp_opts->directives_only = value;
606 break;
607
608 case OPT_fdollars_in_identifiers:
609 cpp_opts->dollars_in_ident = value;
610 break;
611
612 case OPT_ffreestanding:
613 value = !value;
614 /* Fall through.... */
615 case OPT_fhosted:
616 flag_hosted = value;
617 flag_no_builtin = !value;
618 break;
619
620 case OPT_fshort_double:
621 flag_short_double = value;
622 break;
623
624 case OPT_fshort_enums:
625 flag_short_enums = value;
626 break;
627
628 case OPT_fshort_wchar:
629 flag_short_wchar = value;
630 break;
631
632 case OPT_fsigned_bitfields:
633 flag_signed_bitfields = value;
634 break;
635
636 case OPT_fsigned_char:
637 flag_signed_char = value;
638 break;
639
640 case OPT_funsigned_bitfields:
641 flag_signed_bitfields = !value;
642 break;
643
644 case OPT_funsigned_char:
645 flag_signed_char = !value;
646 break;
647
648 case OPT_fcheck_new:
649 flag_check_new = value;
650 break;
651
652 case OPT_fconserve_space:
653 flag_conserve_space = value;
654 break;
655
656 case OPT_fconstant_string_class_:
657 constant_string_class_name = arg;
658 break;
659
660 case OPT_fdefault_inline:
661 flag_default_inline = value;
662 break;
663
664 case OPT_felide_constructors:
665 flag_elide_constructors = value;
666 break;
667
668 case OPT_fenforce_eh_specs:
669 flag_enforce_eh_specs = value;
670 break;
671
672 case OPT_fextended_identifiers:
673 cpp_opts->extended_identifiers = value;
674 break;
675
676 case OPT_ffor_scope:
677 flag_new_for_scope = value;
678 break;
679
680 case OPT_fgnu_keywords:
681 flag_no_gnu_keywords = !value;
682 break;
683
684 case OPT_fgnu_runtime:
685 flag_next_runtime = !value;
686 break;
687
688 case OPT_fhandle_exceptions:
689 warning (0, "-fhandle-exceptions has been renamed -fexceptions (and is now on by default)");
690 flag_exceptions = value;
691 break;
692
693 case OPT_fimplement_inlines:
694 flag_implement_inlines = value;
695 break;
696
697 case OPT_fimplicit_inline_templates:
698 flag_implicit_inline_templates = value;
699 break;
700
701 case OPT_fimplicit_templates:
702 flag_implicit_templates = value;
703 break;
704
705 case OPT_flax_vector_conversions:
706 flag_lax_vector_conversions = value;
707 break;
708
709 case OPT_fms_extensions:
710 flag_ms_extensions = value;
711 break;
712
713 case OPT_fnext_runtime:
714 flag_next_runtime = value;
715 break;
716
717 case OPT_fnil_receivers:
718 flag_nil_receivers = value;
719 break;
720
721 case OPT_fnonansi_builtins:
722 flag_no_nonansi_builtin = !value;
723 break;
724
725 case OPT_foperator_names:
726 cpp_opts->operator_names = value;
727 break;
728
729 case OPT_foptional_diags:
730 flag_optional_diags = value;
731 break;
732
733 case OPT_fpch_deps:
734 cpp_opts->restore_pch_deps = value;
735 break;
736
737 case OPT_fpch_preprocess:
738 flag_pch_preprocess = value;
739 break;
740
741 case OPT_fpermissive:
742 flag_permissive = value;
743 break;
744
745 case OPT_fpreprocessed:
746 cpp_opts->preprocessed = value;
747 break;
748
749 case OPT_freplace_objc_classes:
750 flag_replace_objc_classes = value;
751 break;
752
753 case OPT_frepo:
754 flag_use_repository = value;
755 if (value)
756 flag_implicit_templates = 0;
757 break;
758
759 case OPT_frtti:
760 flag_rtti = value;
761 break;
762
763 case OPT_fshow_column:
764 cpp_opts->show_column = value;
765 break;
766
767 case OPT_fstats:
768 flag_detailed_statistics = value;
769 break;
770
771 case OPT_ftabstop_:
772 /* It is documented that we silently ignore silly values. */
773 if (value >= 1 && value <= 100)
774 cpp_opts->tabstop = value;
775 break;
776
777 case OPT_fexec_charset_:
778 cpp_opts->narrow_charset = arg;
779 break;
780
781 case OPT_fwide_exec_charset_:
782 cpp_opts->wide_charset = arg;
783 break;
784
785 case OPT_finput_charset_:
786 cpp_opts->input_charset = arg;
787 break;
788
789 case OPT_ftemplate_depth_:
790 max_tinst_depth = value;
791 break;
792
793 case OPT_fuse_cxa_atexit:
794 flag_use_cxa_atexit = value;
795 break;
796
797 case OPT_fuse_cxa_get_exception_ptr:
798 flag_use_cxa_get_exception_ptr = value;
799 break;
800
801 case OPT_fvisibility_inlines_hidden:
802 visibility_options.inlines_hidden = value;
803 break;
804
805 case OPT_fweak:
806 flag_weak = value;
807 break;
808
809 case OPT_fthreadsafe_statics:
810 flag_threadsafe_statics = value;
811 break;
812
813 case OPT_fzero_link:
814 flag_zero_link = value;
815 break;
816
817 case OPT_gen_decls:
818 flag_gen_declaration = 1;
819 break;
820
821 case OPT_femit_struct_debug_baseonly:
822 set_struct_debug_option ("base");
823 break;
824
825 case OPT_femit_struct_debug_reduced:
826 set_struct_debug_option ("dir:ord:sys,dir:gen:any,ind:base");
827 break;
828
829 case OPT_femit_struct_debug_detailed_:
830 set_struct_debug_option (arg);
831 break;
832
833 case OPT_idirafter:
834 add_path (xstrdup (arg), AFTER, 0, true);
835 break;
836
837 case OPT_imacros:
838 case OPT_include:
839 defer_opt (code, arg);
840 break;
841
842 case OPT_imultilib:
843 imultilib = arg;
844 break;
845
846 case OPT_iprefix:
847 iprefix = arg;
848 break;
849
850 case OPT_iquote:
851 add_path (xstrdup (arg), QUOTE, 0, true);
852 break;
853
854 case OPT_isysroot:
855 sysroot = arg;
856 break;
857
858 case OPT_isystem:
859 add_path (xstrdup (arg), SYSTEM, 0, true);
860 break;
861
862 case OPT_iwithprefix:
863 add_prefixed_path (arg, SYSTEM);
864 break;
865
866 case OPT_iwithprefixbefore:
867 add_prefixed_path (arg, BRACKET);
868 break;
869
870 case OPT_lang_asm:
871 cpp_set_lang (parse_in, CLK_ASM);
872 cpp_opts->dollars_in_ident = false;
873 break;
874
875 case OPT_lang_objc:
876 cpp_opts->objc = 1;
877 break;
878
879 case OPT_nostdinc:
880 std_inc = false;
881 break;
882
883 case OPT_nostdinc__:
884 std_cxx_inc = false;
885 break;
886
887 case OPT_o:
888 if (!out_fname)
889 out_fname = arg;
890 else
891 error ("output filename specified twice");
892 break;
893
894 /* We need to handle the -pedantic switches here, rather than in
895 c_common_post_options, so that a subsequent -Wno-endif-labels
896 is not overridden. */
897 case OPT_pedantic_errors:
898 cpp_opts->pedantic_errors = 1;
899 /* Fall through. */
900 case OPT_pedantic:
901 cpp_opts->pedantic = 1;
902 cpp_opts->warn_endif_labels = 1;
903 if (warn_pointer_sign == -1)
904 warn_pointer_sign = 1;
905 if (warn_overlength_strings == -1)
906 warn_overlength_strings = 1;
907 if (warn_main == -1)
908 warn_main = 2;
909 break;
910
911 case OPT_print_objc_runtime_info:
912 print_struct_values = 1;
913 break;
914
915 case OPT_print_pch_checksum:
916 c_common_print_pch_checksum (stdout);
917 exit_after_options = true;
918 break;
919
920 case OPT_remap:
921 cpp_opts->remap = 1;
922 break;
923
924 case OPT_std_c__98:
925 case OPT_std_gnu__98:
926 if (!preprocessing_asm_p)
927 set_std_cxx98 (code == OPT_std_c__98 /* ISO */);
928 break;
929
930 case OPT_std_c__0x:
931 case OPT_std_gnu__0x:
932 if (!preprocessing_asm_p)
933 set_std_cxx0x (code == OPT_std_c__0x /* ISO */);
934 break;
935
936 case OPT_std_c89:
937 case OPT_std_iso9899_1990:
938 case OPT_std_iso9899_199409:
939 if (!preprocessing_asm_p)
940 set_std_c89 (code == OPT_std_iso9899_199409 /* c94 */, true /* ISO */);
941 break;
942
943 case OPT_std_gnu89:
944 if (!preprocessing_asm_p)
945 set_std_c89 (false /* c94 */, false /* ISO */);
946 break;
947
948 case OPT_std_c99:
949 case OPT_std_c9x:
950 case OPT_std_iso9899_1999:
951 case OPT_std_iso9899_199x:
952 if (!preprocessing_asm_p)
953 set_std_c99 (true /* ISO */);
954 break;
955
956 case OPT_std_gnu99:
957 case OPT_std_gnu9x:
958 if (!preprocessing_asm_p)
959 set_std_c99 (false /* ISO */);
960 break;
961
962 case OPT_trigraphs:
963 cpp_opts->trigraphs = 1;
964 break;
965
966 case OPT_traditional_cpp:
967 cpp_opts->traditional = 1;
968 break;
969
970 case OPT_undef:
971 flag_undef = 1;
972 break;
973
974 case OPT_w:
975 cpp_opts->inhibit_warnings = 1;
976 break;
977
978 case OPT_v:
979 verbose = true;
980 break;
981
982 case OPT_Wabi:
983 warn_psabi = value;
984 break;
985 }
986
987 return result;
988 }
989
990 /* Post-switch processing. */
991 bool
992 c_common_post_options (const char **pfilename)
993 {
994 struct cpp_callbacks *cb;
995
996 /* Canonicalize the input and output filenames. */
997 if (in_fnames == NULL)
998 {
999 in_fnames = XNEWVEC (const char *, 1);
1000 in_fnames[0] = "";
1001 }
1002 else if (strcmp (in_fnames[0], "-") == 0)
1003 in_fnames[0] = "";
1004
1005 if (out_fname == NULL || !strcmp (out_fname, "-"))
1006 out_fname = "";
1007
1008 if (cpp_opts->deps.style == DEPS_NONE)
1009 check_deps_environment_vars ();
1010
1011 handle_deferred_opts ();
1012
1013 sanitize_cpp_opts ();
1014
1015 register_include_chains (parse_in, sysroot, iprefix, imultilib,
1016 std_inc, std_cxx_inc && c_dialect_cxx (), verbose);
1017
1018 #ifdef C_COMMON_OVERRIDE_OPTIONS
1019 /* Some machines may reject certain combinations of C
1020 language-specific options. */
1021 C_COMMON_OVERRIDE_OPTIONS;
1022 #endif
1023
1024 /* By default we use C99 inline semantics in GNU99 or C99 mode. C99
1025 inline semantics are not supported in GNU89 or C89 mode. */
1026 if (flag_gnu89_inline == -1)
1027 flag_gnu89_inline = !flag_isoc99;
1028 else if (!flag_gnu89_inline && !flag_isoc99)
1029 error ("-fno-gnu89-inline is only supported in GNU99 or C99 mode");
1030
1031 /* Default to ObjC sjlj exception handling if NeXT runtime. */
1032 if (flag_objc_sjlj_exceptions < 0)
1033 flag_objc_sjlj_exceptions = flag_next_runtime;
1034 if (flag_objc_exceptions && !flag_objc_sjlj_exceptions)
1035 flag_exceptions = 1;
1036
1037 /* -Wextra implies -Wtype-limits, -Wclobbered,
1038 -Wempty-body, -Wsign-compare,
1039 -Wmissing-field-initializers, -Wmissing-parameter-type
1040 -Wold-style-declaration, -Woverride-init and -Wignored-qualifiers
1041 but not if explicitly overridden. */
1042 if (warn_type_limits == -1)
1043 warn_type_limits = extra_warnings;
1044 if (warn_clobbered == -1)
1045 warn_clobbered = extra_warnings;
1046 if (warn_empty_body == -1)
1047 warn_empty_body = extra_warnings;
1048 if (warn_sign_compare == -1)
1049 warn_sign_compare = extra_warnings;
1050 if (warn_missing_field_initializers == -1)
1051 warn_missing_field_initializers = extra_warnings;
1052 if (warn_missing_parameter_type == -1)
1053 warn_missing_parameter_type = extra_warnings;
1054 if (warn_old_style_declaration == -1)
1055 warn_old_style_declaration = extra_warnings;
1056 if (warn_override_init == -1)
1057 warn_override_init = extra_warnings;
1058 if (warn_ignored_qualifiers == -1)
1059 warn_ignored_qualifiers = extra_warnings;
1060
1061 /* -Wpointer-sign is disabled by default, but it is enabled if any
1062 of -Wall or -pedantic are given. */
1063 if (warn_pointer_sign == -1)
1064 warn_pointer_sign = 0;
1065
1066 if (warn_strict_aliasing == -1)
1067 warn_strict_aliasing = 0;
1068 if (warn_strict_overflow == -1)
1069 warn_strict_overflow = 0;
1070
1071 /* -Woverlength-strings is off by default, but is enabled by -pedantic.
1072 It is never enabled in C++, as the minimum limit is not normative
1073 in that standard. */
1074 if (warn_overlength_strings == -1 || c_dialect_cxx ())
1075 warn_overlength_strings = 0;
1076
1077 /* Wmain is enabled by default in C++ but not in C. */
1078 /* Wmain is disabled by default for -ffreestanding (!flag_hosted),
1079 even if -Wall was given (warn_main will be 2 if set by -Wall, 1
1080 if set by -Wmain). */
1081 if (warn_main == -1)
1082 warn_main = (c_dialect_cxx () && flag_hosted) ? 1 : 0;
1083 else if (warn_main == 2)
1084 warn_main = flag_hosted ? 1 : 0;
1085
1086 /* In C, -Wconversion enables -Wsign-conversion (unless disabled
1087 through -Wno-sign-conversion). While in C++,
1088 -Wsign-conversion needs to be requested explicitly. */
1089 if (warn_sign_conversion == -1)
1090 warn_sign_conversion = (c_dialect_cxx ()) ? 0 : warn_conversion;
1091
1092 /* -Wpacked-bitfield-compat is on by default for the C languages. The
1093 warning is issued in stor-layout.c which is not part of the front-end so
1094 we need to selectively turn it on here. */
1095 if (warn_packed_bitfield_compat == -1)
1096 warn_packed_bitfield_compat = 1;
1097
1098 /* Special format checking options don't work without -Wformat; warn if
1099 they are used. */
1100 if (!warn_format)
1101 {
1102 warning (OPT_Wformat_y2k,
1103 "-Wformat-y2k ignored without -Wformat");
1104 warning (OPT_Wformat_extra_args,
1105 "-Wformat-extra-args ignored without -Wformat");
1106 warning (OPT_Wformat_zero_length,
1107 "-Wformat-zero-length ignored without -Wformat");
1108 warning (OPT_Wformat_nonliteral,
1109 "-Wformat-nonliteral ignored without -Wformat");
1110 warning (OPT_Wformat_contains_nul,
1111 "-Wformat-contains-nul ignored without -Wformat");
1112 warning (OPT_Wformat_security,
1113 "-Wformat-security ignored without -Wformat");
1114 }
1115
1116 /* -Wimplicit-function-declaration is enabled by default for C99. */
1117 if (warn_implicit_function_declaration == -1)
1118 warn_implicit_function_declaration = flag_isoc99;
1119
1120 /* If we're allowing C++0x constructs, don't warn about C++0x
1121 compatibility problems. */
1122 if (cxx_dialect == cxx0x)
1123 warn_cxx0x_compat = 0;
1124
1125 if (flag_preprocess_only)
1126 {
1127 /* Open the output now. We must do so even if flag_no_output is
1128 on, because there may be other output than from the actual
1129 preprocessing (e.g. from -dM). */
1130 if (out_fname[0] == '\0')
1131 out_stream = stdout;
1132 else
1133 out_stream = fopen (out_fname, "w");
1134
1135 if (out_stream == NULL)
1136 {
1137 fatal_error ("opening output file %s: %m", out_fname);
1138 return false;
1139 }
1140
1141 if (num_in_fnames > 1)
1142 error ("too many filenames given. Type %s --help for usage",
1143 progname);
1144
1145 init_pp_output (out_stream);
1146 }
1147 else
1148 {
1149 init_c_lex ();
1150
1151 /* Yuk. WTF is this? I do know ObjC relies on it somewhere. */
1152 input_location = UNKNOWN_LOCATION;
1153 }
1154
1155 cb = cpp_get_callbacks (parse_in);
1156 cb->file_change = cb_file_change;
1157 cb->dir_change = cb_dir_change;
1158 cpp_post_options (parse_in);
1159
1160 input_location = UNKNOWN_LOCATION;
1161
1162 /* If an error has occurred in cpplib, note it so we fail
1163 immediately. */
1164 errorcount += cpp_errors (parse_in);
1165
1166 *pfilename = this_input_filename
1167 = cpp_read_main_file (parse_in, in_fnames[0]);
1168 /* Don't do any compilation or preprocessing if there is no input file. */
1169 if (this_input_filename == NULL)
1170 {
1171 errorcount++;
1172 return false;
1173 }
1174
1175 if (flag_working_directory
1176 && flag_preprocess_only && !flag_no_line_commands)
1177 pp_dir_change (parse_in, get_src_pwd ());
1178
1179 return flag_preprocess_only;
1180 }
1181
1182 /* Front end initialization common to C, ObjC and C++. */
1183 bool
1184 c_common_init (void)
1185 {
1186 /* Set up preprocessor arithmetic. Must be done after call to
1187 c_common_nodes_and_builtins for type nodes to be good. */
1188 cpp_opts->precision = TYPE_PRECISION (intmax_type_node);
1189 cpp_opts->char_precision = TYPE_PRECISION (char_type_node);
1190 cpp_opts->int_precision = TYPE_PRECISION (integer_type_node);
1191 cpp_opts->wchar_precision = TYPE_PRECISION (wchar_type_node);
1192 cpp_opts->unsigned_wchar = TYPE_UNSIGNED (wchar_type_node);
1193 cpp_opts->bytes_big_endian = BYTES_BIG_ENDIAN;
1194
1195 /* This can't happen until after wchar_precision and bytes_big_endian
1196 are known. */
1197 cpp_init_iconv (parse_in);
1198
1199 if (version_flag)
1200 c_common_print_pch_checksum (stderr);
1201
1202 /* Has to wait until now so that cpplib has its hash table. */
1203 init_pragma ();
1204
1205 if (flag_preprocess_only)
1206 {
1207 finish_options ();
1208 preprocess_file (parse_in);
1209 return false;
1210 }
1211
1212 return true;
1213 }
1214
1215 /* Initialize the integrated preprocessor after debug output has been
1216 initialized; loop over each input file. */
1217 void
1218 c_common_parse_file (int set_yydebug)
1219 {
1220 unsigned int i;
1221
1222 if (set_yydebug)
1223 switch (c_language)
1224 {
1225 case clk_c:
1226 warning(0, "The C parser does not support -dy, option ignored");
1227 break;
1228 case clk_objc:
1229 warning(0,
1230 "The Objective-C parser does not support -dy, option ignored");
1231 break;
1232 case clk_cxx:
1233 warning(0, "The C++ parser does not support -dy, option ignored");
1234 break;
1235 case clk_objcxx:
1236 warning(0,
1237 "The Objective-C++ parser does not support -dy, option ignored");
1238 break;
1239 default:
1240 gcc_unreachable ();
1241 }
1242
1243 i = 0;
1244 for (;;)
1245 {
1246 /* Start the main input file, if the debug writer wants it. */
1247 if (debug_hooks->start_end_main_source_file)
1248 (*debug_hooks->start_source_file) (0, this_input_filename);
1249 finish_options ();
1250 pch_init ();
1251 push_file_scope ();
1252 c_parse_file ();
1253 finish_file ();
1254 pop_file_scope ();
1255 /* And end the main input file, if the debug writer wants it */
1256 if (debug_hooks->start_end_main_source_file)
1257 (*debug_hooks->end_source_file) (0);
1258 if (++i >= num_in_fnames)
1259 break;
1260 cpp_undef_all (parse_in);
1261 cpp_clear_file_cache (parse_in);
1262 this_input_filename
1263 = cpp_read_main_file (parse_in, in_fnames[i]);
1264 /* If an input file is missing, abandon further compilation.
1265 cpplib has issued a diagnostic. */
1266 if (!this_input_filename)
1267 break;
1268 }
1269 }
1270
1271 /* Common finish hook for the C, ObjC and C++ front ends. */
1272 void
1273 c_common_finish (void)
1274 {
1275 FILE *deps_stream = NULL;
1276
1277 if (cpp_opts->deps.style != DEPS_NONE)
1278 {
1279 /* If -M or -MM was seen without -MF, default output to the
1280 output stream. */
1281 if (!deps_file)
1282 deps_stream = out_stream;
1283 else
1284 {
1285 deps_stream = fopen (deps_file, deps_append ? "a": "w");
1286 if (!deps_stream)
1287 fatal_error ("opening dependency file %s: %m", deps_file);
1288 }
1289 }
1290
1291 /* For performance, avoid tearing down cpplib's internal structures
1292 with cpp_destroy (). */
1293 errorcount += cpp_finish (parse_in, deps_stream);
1294
1295 if (deps_stream && deps_stream != out_stream
1296 && (ferror (deps_stream) || fclose (deps_stream)))
1297 fatal_error ("closing dependency file %s: %m", deps_file);
1298
1299 if (out_stream && (ferror (out_stream) || fclose (out_stream)))
1300 fatal_error ("when writing output to %s: %m", out_fname);
1301 }
1302
1303 /* Either of two environment variables can specify output of
1304 dependencies. Their value is either "OUTPUT_FILE" or "OUTPUT_FILE
1305 DEPS_TARGET", where OUTPUT_FILE is the file to write deps info to
1306 and DEPS_TARGET is the target to mention in the deps. They also
1307 result in dependency information being appended to the output file
1308 rather than overwriting it, and like Sun's compiler
1309 SUNPRO_DEPENDENCIES suppresses the dependency on the main file. */
1310 static void
1311 check_deps_environment_vars (void)
1312 {
1313 char *spec;
1314
1315 GET_ENVIRONMENT (spec, "DEPENDENCIES_OUTPUT");
1316 if (spec)
1317 cpp_opts->deps.style = DEPS_USER;
1318 else
1319 {
1320 GET_ENVIRONMENT (spec, "SUNPRO_DEPENDENCIES");
1321 if (spec)
1322 {
1323 cpp_opts->deps.style = DEPS_SYSTEM;
1324 cpp_opts->deps.ignore_main_file = true;
1325 }
1326 }
1327
1328 if (spec)
1329 {
1330 /* Find the space before the DEPS_TARGET, if there is one. */
1331 char *s = strchr (spec, ' ');
1332 if (s)
1333 {
1334 /* Let the caller perform MAKE quoting. */
1335 defer_opt (OPT_MT, s + 1);
1336 *s = '\0';
1337 }
1338
1339 /* Command line -MF overrides environment variables and default. */
1340 if (!deps_file)
1341 deps_file = spec;
1342
1343 deps_append = 1;
1344 deps_seen = true;
1345 }
1346 }
1347
1348 /* Handle deferred command line switches. */
1349 static void
1350 handle_deferred_opts (void)
1351 {
1352 size_t i;
1353 struct deps *deps;
1354
1355 /* Avoid allocating the deps buffer if we don't need it.
1356 (This flag may be true without there having been -MT or -MQ
1357 options, but we'll still need the deps buffer.) */
1358 if (!deps_seen)
1359 return;
1360
1361 deps = cpp_get_deps (parse_in);
1362
1363 for (i = 0; i < deferred_count; i++)
1364 {
1365 struct deferred_opt *opt = &deferred_opts[i];
1366
1367 if (opt->code == OPT_MT || opt->code == OPT_MQ)
1368 deps_add_target (deps, opt->arg, opt->code == OPT_MQ);
1369 }
1370 }
1371
1372 /* These settings are appropriate for GCC, but not necessarily so for
1373 cpplib as a library. */
1374 static void
1375 sanitize_cpp_opts (void)
1376 {
1377 /* If we don't know what style of dependencies to output, complain
1378 if any other dependency switches have been given. */
1379 if (deps_seen && cpp_opts->deps.style == DEPS_NONE)
1380 error ("to generate dependencies you must specify either -M or -MM");
1381
1382 /* -dM and dependencies suppress normal output; do it here so that
1383 the last -d[MDN] switch overrides earlier ones. */
1384 if (flag_dump_macros == 'M')
1385 flag_no_output = 1;
1386
1387 /* By default, -fdirectives-only implies -dD. This allows subsequent phases
1388 to perform proper macro expansion. */
1389 if (cpp_opts->directives_only && !cpp_opts->preprocessed && !flag_dump_macros)
1390 flag_dump_macros = 'D';
1391
1392 /* Disable -dD, -dN and -dI if normal output is suppressed. Allow
1393 -dM since at least glibc relies on -M -dM to work. */
1394 /* Also, flag_no_output implies flag_no_line_commands, always. */
1395 if (flag_no_output)
1396 {
1397 if (flag_dump_macros != 'M')
1398 flag_dump_macros = 0;
1399 flag_dump_includes = 0;
1400 flag_no_line_commands = 1;
1401 }
1402 else if (cpp_opts->deps.missing_files)
1403 error ("-MG may only be used with -M or -MM");
1404
1405 cpp_opts->unsigned_char = !flag_signed_char;
1406 cpp_opts->stdc_0_in_system_headers = STDC_0_IN_SYSTEM_HEADERS;
1407
1408 /* We want -Wno-long-long to override -pedantic -std=non-c99
1409 and/or -Wtraditional, whatever the ordering. */
1410 cpp_opts->warn_long_long
1411 = warn_long_long && ((pedantic
1412 && (c_dialect_cxx ()
1413 ? cxx_dialect == cxx98
1414 : !flag_isoc99))
1415 || warn_traditional);
1416
1417 /* Similarly with -Wno-variadic-macros. No check for c99 here, since
1418 this also turns off warnings about GCCs extension. */
1419 cpp_opts->warn_variadic_macros
1420 = warn_variadic_macros && (pedantic || warn_traditional);
1421
1422 /* If we're generating preprocessor output, emit current directory
1423 if explicitly requested or if debugging information is enabled.
1424 ??? Maybe we should only do it for debugging formats that
1425 actually output the current directory? */
1426 if (flag_working_directory == -1)
1427 flag_working_directory = (debug_info_level != DINFO_LEVEL_NONE);
1428
1429 if (cpp_opts->directives_only)
1430 {
1431 if (warn_unused_macros)
1432 error ("-fdirectives-only is incompatible with -Wunused_macros");
1433 if (cpp_opts->traditional)
1434 error ("-fdirectives-only is incompatible with -traditional");
1435 }
1436 }
1437
1438 /* Add include path with a prefix at the front of its name. */
1439 static void
1440 add_prefixed_path (const char *suffix, size_t chain)
1441 {
1442 char *path;
1443 const char *prefix;
1444 size_t prefix_len, suffix_len;
1445
1446 suffix_len = strlen (suffix);
1447 prefix = iprefix ? iprefix : cpp_GCC_INCLUDE_DIR;
1448 prefix_len = iprefix ? strlen (iprefix) : cpp_GCC_INCLUDE_DIR_len;
1449
1450 path = (char *) xmalloc (prefix_len + suffix_len + 1);
1451 memcpy (path, prefix, prefix_len);
1452 memcpy (path + prefix_len, suffix, suffix_len);
1453 path[prefix_len + suffix_len] = '\0';
1454
1455 add_path (path, chain, 0, false);
1456 }
1457
1458 /* Handle -D, -U, -A, -imacros, and the first -include. */
1459 static void
1460 finish_options (void)
1461 {
1462 if (!cpp_opts->preprocessed)
1463 {
1464 size_t i;
1465
1466 cb_file_change (parse_in,
1467 linemap_add (line_table, LC_RENAME, 0,
1468 _("<built-in>"), 0));
1469
1470 cpp_init_builtins (parse_in, flag_hosted);
1471 c_cpp_builtins (parse_in);
1472
1473 /* We're about to send user input to cpplib, so make it warn for
1474 things that we previously (when we sent it internal definitions)
1475 told it to not warn.
1476
1477 C99 permits implementation-defined characters in identifiers.
1478 The documented meaning of -std= is to turn off extensions that
1479 conflict with the specified standard, and since a strictly
1480 conforming program cannot contain a '$', we do not condition
1481 their acceptance on the -std= setting. */
1482 cpp_opts->warn_dollars = (cpp_opts->pedantic && !cpp_opts->c99);
1483
1484 cb_file_change (parse_in,
1485 linemap_add (line_table, LC_RENAME, 0,
1486 _("<command-line>"), 0));
1487
1488 for (i = 0; i < deferred_count; i++)
1489 {
1490 struct deferred_opt *opt = &deferred_opts[i];
1491
1492 if (opt->code == OPT_D)
1493 cpp_define (parse_in, opt->arg);
1494 else if (opt->code == OPT_U)
1495 cpp_undef (parse_in, opt->arg);
1496 else if (opt->code == OPT_A)
1497 {
1498 if (opt->arg[0] == '-')
1499 cpp_unassert (parse_in, opt->arg + 1);
1500 else
1501 cpp_assert (parse_in, opt->arg);
1502 }
1503 }
1504
1505 /* Handle -imacros after -D and -U. */
1506 for (i = 0; i < deferred_count; i++)
1507 {
1508 struct deferred_opt *opt = &deferred_opts[i];
1509
1510 if (opt->code == OPT_imacros
1511 && cpp_push_include (parse_in, opt->arg))
1512 {
1513 /* Disable push_command_line_include callback for now. */
1514 include_cursor = deferred_count + 1;
1515 cpp_scan_nooutput (parse_in);
1516 }
1517 }
1518 }
1519 else if (cpp_opts->directives_only)
1520 cpp_init_special_builtins (parse_in);
1521
1522 include_cursor = 0;
1523 push_command_line_include ();
1524 }
1525
1526 /* Give CPP the next file given by -include, if any. */
1527 static void
1528 push_command_line_include (void)
1529 {
1530 while (include_cursor < deferred_count)
1531 {
1532 struct deferred_opt *opt = &deferred_opts[include_cursor++];
1533
1534 if (!cpp_opts->preprocessed && opt->code == OPT_include
1535 && cpp_push_include (parse_in, opt->arg))
1536 return;
1537 }
1538
1539 if (include_cursor == deferred_count)
1540 {
1541 include_cursor++;
1542 /* -Wunused-macros should only warn about macros defined hereafter. */
1543 cpp_opts->warn_unused_macros = warn_unused_macros;
1544 /* Restore the line map from <command line>. */
1545 if (!cpp_opts->preprocessed)
1546 cpp_change_file (parse_in, LC_RENAME, this_input_filename);
1547
1548 /* Set this here so the client can change the option if it wishes,
1549 and after stacking the main file so we don't trace the main file. */
1550 line_table->trace_includes = cpp_opts->print_include_names;
1551 }
1552 }
1553
1554 /* File change callback. Has to handle -include files. */
1555 static void
1556 cb_file_change (cpp_reader * ARG_UNUSED (pfile),
1557 const struct line_map *new_map)
1558 {
1559 if (flag_preprocess_only)
1560 pp_file_change (new_map);
1561 else
1562 fe_file_change (new_map);
1563
1564 if (new_map == 0 || (new_map->reason == LC_LEAVE && MAIN_FILE_P (new_map)))
1565 push_command_line_include ();
1566 }
1567
1568 void
1569 cb_dir_change (cpp_reader * ARG_UNUSED (pfile), const char *dir)
1570 {
1571 if (!set_src_pwd (dir))
1572 warning (0, "too late for # directive to set debug directory");
1573 }
1574
1575 /* Set the C 89 standard (with 1994 amendments if C94, without GNU
1576 extensions if ISO). There is no concept of gnu94. */
1577 static void
1578 set_std_c89 (int c94, int iso)
1579 {
1580 cpp_set_lang (parse_in, c94 ? CLK_STDC94: iso ? CLK_STDC89: CLK_GNUC89);
1581 flag_iso = iso;
1582 flag_no_asm = iso;
1583 flag_no_gnu_keywords = iso;
1584 flag_no_nonansi_builtin = iso;
1585 flag_isoc94 = c94;
1586 flag_isoc99 = 0;
1587 }
1588
1589 /* Set the C 99 standard (without GNU extensions if ISO). */
1590 static void
1591 set_std_c99 (int iso)
1592 {
1593 cpp_set_lang (parse_in, iso ? CLK_STDC99: CLK_GNUC99);
1594 flag_no_asm = iso;
1595 flag_no_nonansi_builtin = iso;
1596 flag_iso = iso;
1597 flag_isoc99 = 1;
1598 flag_isoc94 = 1;
1599 }
1600
1601 /* Set the C++ 98 standard (without GNU extensions if ISO). */
1602 static void
1603 set_std_cxx98 (int iso)
1604 {
1605 cpp_set_lang (parse_in, iso ? CLK_CXX98: CLK_GNUCXX);
1606 flag_no_gnu_keywords = iso;
1607 flag_no_nonansi_builtin = iso;
1608 flag_iso = iso;
1609 cxx_dialect = cxx98;
1610 }
1611
1612 /* Set the C++ 0x working draft "standard" (without GNU extensions if ISO). */
1613 static void
1614 set_std_cxx0x (int iso)
1615 {
1616 cpp_set_lang (parse_in, iso ? CLK_CXX0X: CLK_GNUCXX0X);
1617 flag_no_gnu_keywords = iso;
1618 flag_no_nonansi_builtin = iso;
1619 flag_iso = iso;
1620 cxx_dialect = cxx0x;
1621 }
1622
1623 /* Handle setting implicit to ON. */
1624 static void
1625 set_Wimplicit (int on)
1626 {
1627 warn_implicit = on;
1628 warn_implicit_int = on;
1629 warn_implicit_function_declaration = on;
1630 }
1631
1632 /* Args to -d specify what to dump. Silently ignore
1633 unrecognized options; they may be aimed at toplev.c. */
1634 static void
1635 handle_OPT_d (const char *arg)
1636 {
1637 char c;
1638
1639 while ((c = *arg++) != '\0')
1640 switch (c)
1641 {
1642 case 'M': /* Dump macros only. */
1643 case 'N': /* Dump names. */
1644 case 'D': /* Dump definitions. */
1645 case 'U': /* Dump used macros. */
1646 flag_dump_macros = c;
1647 break;
1648
1649 case 'I':
1650 flag_dump_includes = 1;
1651 break;
1652 }
1653 }