1 /* C/ObjC/C++ command line option handling.
2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007
3 Free Software Foundation, Inc.
4 Contributed by Neil Booth.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 2, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to the Free
20 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
27 #include "coretypes.h"
34 #include "langhooks.h"
35 #include "tree-inline.h"
36 #include "diagnostic.h"
38 #include "cppdefault.h"
39 #include "c-incpath.h"
40 #include "debug.h" /* For debug_hooks. */
45 #ifndef DOLLARS_IN_IDENTIFIERS
46 # define DOLLARS_IN_IDENTIFIERS true
49 #ifndef TARGET_SYSTEM_ROOT
50 # define TARGET_SYSTEM_ROOT NULL
54 #define TARGET_OPTF(ARG)
58 static cpp_options *cpp_opts;
61 static const char *this_input_filename;
63 /* Filename and stream for preprocessed output. */
64 static const char *out_fname;
65 static FILE *out_stream;
67 /* Append dependencies to deps_file. */
68 static bool deps_append;
70 /* If dependency switches (-MF etc.) have been given. */
71 static bool deps_seen;
76 /* If -lang-fortran seen. */
77 static bool lang_fortran = false;
79 /* Dependency output file. */
80 static const char *deps_file;
82 /* The prefix given by -iprefix, if any. */
83 static const char *iprefix;
85 /* The multilib directory given by -imultilib, if any. */
86 static const char *imultilib;
88 /* The system root, if any. Overridden by -isysroot. */
89 static const char *sysroot = TARGET_SYSTEM_ROOT;
91 /* Zero disables all standard directories for headers. */
92 static bool std_inc = true;
94 /* Zero disables the C++-specific standard directories for headers. */
95 static bool std_cxx_inc = true;
97 /* If the quote chain has been split by -I-. */
98 static bool quote_chain_split;
100 /* If -Wunused-macros. */
101 static bool warn_unused_macros;
103 /* If -Wvariadic-macros. */
104 static bool warn_variadic_macros = true;
106 /* Number of deferred options. */
107 static size_t deferred_count;
109 /* Number of deferred options scanned for -include. */
110 static size_t include_cursor;
112 static void set_Wimplicit (int);
113 static void handle_OPT_d (const char *);
114 static void set_std_cxx98 (int);
115 static void set_std_c89 (int, int);
116 static void set_std_c99 (int);
117 static void check_deps_environment_vars (void);
118 static void handle_deferred_opts (void);
119 static void sanitize_cpp_opts (void);
120 static void add_prefixed_path (const char *, size_t);
121 static void push_command_line_include (void);
122 static void cb_file_change (cpp_reader *, const struct line_map *);
123 static void cb_dir_change (cpp_reader *, const char *);
124 static void finish_options (void);
126 #ifndef STDC_0_IN_SYSTEM_HEADERS
127 #define STDC_0_IN_SYSTEM_HEADERS 0
130 /* Holds switches parsed by c_common_handle_option (), but whose
131 handling is deferred to c_common_post_options (). */
132 static void defer_opt (enum opt_code, const char *);
133 static struct deferred_opt
139 /* Complain that switch CODE expects an argument but none was
140 provided. OPT was the command-line option. Return FALSE to get
141 the default message in opts.c, TRUE if we provide a specialized
144 c_common_missing_argument (const char *opt, size_t code)
149 /* Pick up the default message. */
152 case OPT_fconstant_string_class_:
153 error ("no class name specified with %qs", opt);
157 error ("assertion missing after %qs", opt);
162 error ("macro name missing after %qs", opt);
171 error ("missing path after %qs", opt);
180 error ("missing filename after %qs", opt);
185 error ("missing makefile target after %qs", opt);
192 /* Defer option CODE with argument ARG. */
194 defer_opt (enum opt_code code, const char *arg)
196 deferred_opts[deferred_count].code = code;
197 deferred_opts[deferred_count].arg = arg;
201 /* Common initialization before parsing options. */
203 c_common_init_options (unsigned int argc, const char **argv)
205 static const unsigned int lang_flags[] = {CL_C, CL_ObjC, CL_CXX, CL_ObjCXX};
206 unsigned int i, result;
208 /* This is conditionalized only because that is the way the front
209 ends used to do it. Maybe this should be unconditional? */
210 if (c_dialect_cxx ())
212 /* By default wrap lines at 80 characters. Is getenv
213 ("COLUMNS") preferable? */
214 diagnostic_line_cutoff (global_dc) = 80;
215 /* By default, emit location information once for every
216 diagnostic message. */
217 diagnostic_prefixing_rule (global_dc) = DIAGNOSTICS_SHOW_PREFIX_ONCE;
220 parse_in = cpp_create_reader (c_dialect_cxx () ? CLK_GNUCXX: CLK_GNUC89,
221 ident_hash, &line_table);
223 cpp_opts = cpp_get_options (parse_in);
224 cpp_opts->dollars_in_ident = DOLLARS_IN_IDENTIFIERS;
225 cpp_opts->objc = c_dialect_objc ();
227 /* Reset to avoid warnings on internal definitions. We set it just
228 before passing on command-line options to cpplib. */
229 cpp_opts->warn_dollars = 0;
231 flag_exceptions = c_dialect_cxx ();
232 warn_pointer_arith = c_dialect_cxx ();
233 warn_write_strings = c_dialect_cxx();
235 deferred_opts = XNEWVEC (struct deferred_opt, argc);
237 result = lang_flags[c_language];
239 if (c_language == clk_c)
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"))
246 result |= CL_C | CL_ObjC | CL_CXX | CL_ObjCXX;
251 for (i = 1; i < argc; i++)
252 if (! strcmp (argv[i], "-lang-fortran"))
254 result |= CL_Fortran;
263 /* Handle switch SCODE with argument ARG. VALUE is true, unless no-
264 form of an -f or -W option was given. Returns 0 if the switch was
265 invalid, a negative number to prevent language-independent
266 processing in toplev.c (a hack necessary for the short-term). */
268 c_common_handle_option (size_t scode, const char *arg, int value)
270 const struct cl_option *option = &cl_options[scode];
271 enum opt_code code = (enum opt_code) scode;
274 /* Prevent resetting the language standard to a C dialect when the driver
275 has already determined that we're looking at assembler input. */
276 bool preprocessing_asm_p = (cpp_get_options (parse_in)->lang == CLK_ASM);
281 if (cl_options[code].flags & (CL_C | CL_CXX | CL_ObjC | CL_ObjCXX))
284 if (lang_fortran && (cl_options[code].flags & (CL_Fortran)))
290 case OPT__output_pch_:
295 defer_opt (code, arg);
299 cpp_opts->discard_comments = 0;
303 cpp_opts->discard_comments = 0;
304 cpp_opts->discard_comments_in_macro_exp = 0;
308 defer_opt (code, arg);
312 flag_preprocess_only = 1;
316 cpp_opts->print_include_names = 1;
320 TARGET_OPTF (xstrdup (arg));
324 if (strcmp (arg, "-"))
325 add_path (xstrdup (arg), BRACKET, 0, true);
328 if (quote_chain_split)
329 error ("-I- specified twice");
330 quote_chain_split = true;
331 split_quote_chain ();
332 inform ("obsolete option -I- used, please use -iquote instead");
338 /* When doing dependencies with -M or -MM, suppress normal
339 preprocessed output, but still do -dM etc. as software
340 depends on this. Preprocessed output does occur if -MD, -MMD
341 or environment var dependency generation is used. */
342 cpp_opts->deps.style = (code == OPT_M ? DEPS_SYSTEM: DEPS_USER);
344 cpp_opts->inhibit_warnings = 1;
349 cpp_opts->deps.style = (code == OPT_MD ? DEPS_SYSTEM: DEPS_USER);
360 cpp_opts->deps.missing_files = true;
365 cpp_opts->deps.phony_targets = true;
371 defer_opt (code, arg);
375 flag_no_line_commands = 1;
378 case OPT_fworking_directory:
379 flag_working_directory = value;
383 defer_opt (code, arg);
389 set_Wimplicit (value);
390 warn_char_subscripts = value;
391 warn_missing_braces = value;
392 warn_parentheses = value;
393 warn_return_type = value;
394 warn_sequence_point = value; /* Was C only. */
395 if (c_dialect_cxx ())
396 warn_sign_compare = value;
398 warn_strict_aliasing = value;
399 warn_strict_overflow = value;
400 warn_address = value;
402 /* Only warn about unknown pragmas that are not in system
404 warn_unknown_pragmas = value;
406 /* We save the value of warn_uninitialized, since if they put
407 -Wuninitialized on the command line, we need to generate a
408 warning about not using it without also specifying -O. */
409 if (warn_uninitialized != 1)
410 warn_uninitialized = (value ? 2 : 0);
412 if (!c_dialect_cxx ())
413 /* We set this to 2 here, but 1 in -Wmain, so -ffreestanding
414 can turn it off only if it's not explicit. */
415 warn_main = value * 2;
418 /* C++-specific warnings. */
419 warn_reorder = value;
420 warn_nontemplate_friend = value;
423 cpp_opts->warn_trigraphs = value;
424 cpp_opts->warn_comments = value;
425 cpp_opts->warn_num_sign_change = value;
426 cpp_opts->warn_multichar = value; /* Was C++ only. */
428 if (warn_pointer_sign == -1)
429 warn_pointer_sign = 1;
434 cpp_opts->warn_comments = value;
437 case OPT_Wdeprecated:
438 cpp_opts->warn_deprecated = value;
441 case OPT_Wendif_labels:
442 cpp_opts->warn_endif_labels = value;
446 cpp_opts->warnings_are_errors = value;
447 global_dc->warning_as_error_requested = value;
450 case OPT_Werror_implicit_function_declaration:
451 mesg_implicit_function_declaration = 2;
459 set_Wformat (atoi (arg));
463 set_Wimplicit (value);
467 /* Silently ignore for now. */
470 case OPT_Winvalid_pch:
471 cpp_opts->warn_invalid_pch = value;
481 case OPT_Wmissing_include_dirs:
482 cpp_opts->warn_missing_include_dirs = value;
486 cpp_opts->warn_multichar = value;
489 case OPT_Wnormalized_:
490 if (!value || (arg && strcasecmp (arg, "none") == 0))
491 cpp_opts->warn_normalize = normalized_none;
492 else if (!arg || strcasecmp (arg, "nfkc") == 0)
493 cpp_opts->warn_normalize = normalized_KC;
494 else if (strcasecmp (arg, "id") == 0)
495 cpp_opts->warn_normalize = normalized_identifier_C;
496 else if (strcasecmp (arg, "nfc") == 0)
497 cpp_opts->warn_normalize = normalized_C;
499 error ("argument %qs to %<-Wnormalized%> not recognized", arg);
502 case OPT_Wreturn_type:
503 warn_return_type = value;
506 case OPT_Wstrict_null_sentinel:
507 warn_strict_null_sentinel = value;
510 case OPT_Wsystem_headers:
511 cpp_opts->warn_system_headers = value;
514 case OPT_Wtraditional:
515 cpp_opts->warn_traditional = value;
519 cpp_opts->warn_trigraphs = value;
523 cpp_opts->warn_undef = value;
526 case OPT_Wunknown_pragmas:
527 /* Set to greater than 1, so that even unknown pragmas in
528 system headers will be warned about. */
529 warn_unknown_pragmas = value * 2;
532 case OPT_Wunused_macros:
533 warn_unused_macros = value;
536 case OPT_Wvariadic_macros:
537 warn_variadic_macros = value;
540 case OPT_Wwrite_strings:
541 warn_write_strings = value;
547 warn_nonvdtor = true;
551 if (!c_dialect_cxx ())
552 set_std_c89 (false, true);
554 set_std_cxx98 (true);
561 case OPT_fcond_mismatch:
562 if (!c_dialect_cxx ())
564 flag_cond_mismatch = value;
569 case OPT_fall_virtual:
570 case OPT_falt_external_templates:
571 case OPT_fenum_int_equiv:
572 case OPT_fexternal_templates:
573 case OPT_fguiding_decls:
575 case OPT_fhuge_objects:
577 case OPT_fname_mangling_version_:
579 case OPT_fnonnull_objects:
581 case OPT_fstrict_prototype:
582 case OPT_fthis_is_variable:
583 case OPT_fvtable_thunks:
586 warning (0, "switch %qs is no longer supported", option->opt_text);
589 case OPT_faccess_control:
590 flag_access_control = value;
594 flag_no_asm = !value;
598 flag_no_builtin = !value;
605 disable_builtin_function (arg);
608 case OPT_fdollars_in_identifiers:
609 cpp_opts->dollars_in_ident = value;
612 case OPT_ffreestanding:
614 /* Fall through.... */
617 flag_no_builtin = !value;
618 /* warn_main will be 2 if set by -Wall, 1 if set by -Wmain */
619 if (!value && warn_main == 2)
623 case OPT_fshort_double:
624 flag_short_double = value;
627 case OPT_fshort_enums:
628 flag_short_enums = value;
631 case OPT_fshort_wchar:
632 flag_short_wchar = value;
635 case OPT_fsigned_bitfields:
636 flag_signed_bitfields = value;
639 case OPT_fsigned_char:
640 flag_signed_char = value;
643 case OPT_funsigned_bitfields:
644 flag_signed_bitfields = !value;
647 case OPT_funsigned_char:
648 flag_signed_char = !value;
652 flag_check_new = value;
655 case OPT_fconserve_space:
656 flag_conserve_space = value;
659 case OPT_fconstant_string_class_:
660 constant_string_class_name = arg;
663 case OPT_fdefault_inline:
664 flag_default_inline = value;
667 case OPT_felide_constructors:
668 flag_elide_constructors = value;
671 case OPT_fenforce_eh_specs:
672 flag_enforce_eh_specs = value;
675 case OPT_fextended_identifiers:
676 cpp_opts->extended_identifiers = value;
680 flag_new_for_scope = value;
683 case OPT_fgnu_keywords:
684 flag_no_gnu_keywords = !value;
687 case OPT_fgnu_runtime:
688 flag_next_runtime = !value;
691 case OPT_fhandle_exceptions:
692 warning (0, "-fhandle-exceptions has been renamed -fexceptions (and is now on by default)");
693 flag_exceptions = value;
696 case OPT_fimplement_inlines:
697 flag_implement_inlines = value;
700 case OPT_fimplicit_inline_templates:
701 flag_implicit_inline_templates = value;
704 case OPT_fimplicit_templates:
705 flag_implicit_templates = value;
708 case OPT_fms_extensions:
709 flag_ms_extensions = value;
712 case OPT_fnext_runtime:
713 flag_next_runtime = value;
716 case OPT_fnil_receivers:
717 flag_nil_receivers = value;
720 case OPT_fnonansi_builtins:
721 flag_no_nonansi_builtin = !value;
724 case OPT_foperator_names:
725 cpp_opts->operator_names = value;
728 case OPT_foptional_diags:
729 flag_optional_diags = value;
733 cpp_opts->restore_pch_deps = value;
736 case OPT_fpch_preprocess:
737 flag_pch_preprocess = value;
740 case OPT_fpermissive:
741 flag_permissive = value;
744 case OPT_fpreprocessed:
745 cpp_opts->preprocessed = value;
748 case OPT_freplace_objc_classes:
749 flag_replace_objc_classes = value;
753 flag_use_repository = value;
755 flag_implicit_templates = 0;
762 case OPT_fshow_column:
763 cpp_opts->show_column = value;
767 flag_detailed_statistics = value;
771 /* It is documented that we silently ignore silly values. */
772 if (value >= 1 && value <= 100)
773 cpp_opts->tabstop = value;
776 case OPT_fexec_charset_:
777 cpp_opts->narrow_charset = arg;
780 case OPT_fwide_exec_charset_:
781 cpp_opts->wide_charset = arg;
784 case OPT_finput_charset_:
785 cpp_opts->input_charset = arg;
788 case OPT_ftemplate_depth_:
789 max_tinst_depth = value;
792 case OPT_fuse_cxa_atexit:
793 flag_use_cxa_atexit = value;
796 case OPT_fuse_cxa_get_exception_ptr:
797 flag_use_cxa_get_exception_ptr = value;
800 case OPT_fvisibility_inlines_hidden:
801 visibility_options.inlines_hidden = value;
808 case OPT_fthreadsafe_statics:
809 flag_threadsafe_statics = value;
813 flag_zero_link = value;
817 flag_gen_declaration = 1;
821 add_path (xstrdup (arg), AFTER, 0, true);
826 defer_opt (code, arg);
838 add_path (xstrdup (arg), QUOTE, 0, true);
846 add_path (xstrdup (arg), SYSTEM, 0, true);
849 case OPT_iwithprefix:
850 add_prefixed_path (arg, SYSTEM);
853 case OPT_iwithprefixbefore:
854 add_prefixed_path (arg, BRACKET);
858 cpp_set_lang (parse_in, CLK_ASM);
859 cpp_opts->dollars_in_ident = false;
862 case OPT_lang_fortran:
882 error ("output filename specified twice");
885 /* We need to handle the -pedantic switches here, rather than in
886 c_common_post_options, so that a subsequent -Wno-endif-labels
887 is not overridden. */
888 case OPT_pedantic_errors:
889 cpp_opts->pedantic_errors = 1;
892 cpp_opts->pedantic = 1;
893 cpp_opts->warn_endif_labels = 1;
894 if (warn_pointer_sign == -1)
895 warn_pointer_sign = 1;
896 if (warn_overlength_strings == -1)
897 warn_overlength_strings = 1;
900 case OPT_print_objc_runtime_info:
901 print_struct_values = 1;
904 case OPT_print_pch_checksum:
905 c_common_print_pch_checksum (stdout);
906 exit_after_options = true;
914 case OPT_std_gnu__98:
915 if (!preprocessing_asm_p)
916 set_std_cxx98 (code == OPT_std_c__98 /* ISO */);
920 case OPT_std_iso9899_1990:
921 case OPT_std_iso9899_199409:
922 if (!preprocessing_asm_p)
923 set_std_c89 (code == OPT_std_iso9899_199409 /* c94 */, true /* ISO */);
927 if (!preprocessing_asm_p)
928 set_std_c89 (false /* c94 */, false /* ISO */);
933 case OPT_std_iso9899_1999:
934 case OPT_std_iso9899_199x:
935 if (!preprocessing_asm_p)
936 set_std_c99 (true /* ISO */);
941 if (!preprocessing_asm_p)
942 set_std_c99 (false /* ISO */);
946 cpp_opts->trigraphs = 1;
949 case OPT_traditional_cpp:
950 cpp_opts->traditional = 1;
958 cpp_opts->inhibit_warnings = 1;
969 /* Post-switch processing. */
971 c_common_post_options (const char **pfilename)
973 struct cpp_callbacks *cb;
975 /* Canonicalize the input and output filenames. */
976 if (in_fnames == NULL)
978 in_fnames = XNEWVEC (const char *, 1);
981 else if (strcmp (in_fnames[0], "-") == 0)
984 if (out_fname == NULL || !strcmp (out_fname, "-"))
987 if (cpp_opts->deps.style == DEPS_NONE)
988 check_deps_environment_vars ();
990 handle_deferred_opts ();
992 sanitize_cpp_opts ();
994 register_include_chains (parse_in, sysroot, iprefix, imultilib,
995 std_inc, std_cxx_inc && c_dialect_cxx (), verbose);
997 #ifdef C_COMMON_OVERRIDE_OPTIONS
998 /* Some machines may reject certain combinations of C
999 language-specific options. */
1000 C_COMMON_OVERRIDE_OPTIONS;
1003 flag_inline_trees = 1;
1005 /* Use tree inlining. */
1006 if (!flag_no_inline)
1008 if (flag_inline_functions)
1009 flag_inline_trees = 2;
1011 /* We recognize -fgnu89-inline in preparation for 4.3 where the
1012 option will be meaningful. Here we just reject
1013 -fno-gnu89-inline, since we don't support it. */
1014 if (!flag_gnu89_inline)
1015 error ("-fno-gnu89-inline is not supported");
1017 /* If we are given more than one input file, we must use
1018 unit-at-a-time mode. */
1019 if (num_in_fnames > 1)
1020 flag_unit_at_a_time = 1;
1022 /* Default to ObjC sjlj exception handling if NeXT runtime. */
1023 if (flag_objc_sjlj_exceptions < 0)
1024 flag_objc_sjlj_exceptions = flag_next_runtime;
1025 if (flag_objc_exceptions && !flag_objc_sjlj_exceptions)
1026 flag_exceptions = 1;
1028 /* -Wextra implies -Wsign-compare, -Wmissing-field-initializers and
1029 -Woverride-init, but not if explicitly overridden. */
1030 if (warn_sign_compare == -1)
1031 warn_sign_compare = extra_warnings;
1032 if (warn_missing_field_initializers == -1)
1033 warn_missing_field_initializers = extra_warnings;
1034 if (warn_override_init == -1)
1035 warn_override_init = extra_warnings;
1037 /* -Wpointer_sign is disabled by default, but it is enabled if any
1038 of -Wall or -pedantic are given. */
1039 if (warn_pointer_sign == -1)
1040 warn_pointer_sign = 0;
1042 /* -Woverlength-strings is off by default, but is enabled by -pedantic.
1043 It is never enabled in C++, as the minimum limit is not normative
1044 in that standard. */
1045 if (warn_overlength_strings == -1 || c_dialect_cxx ())
1046 warn_overlength_strings = 0;
1048 /* Special format checking options don't work without -Wformat; warn if
1052 warning (OPT_Wformat_y2k,
1053 "-Wformat-y2k ignored without -Wformat");
1054 warning (OPT_Wformat_extra_args,
1055 "-Wformat-extra-args ignored without -Wformat");
1056 warning (OPT_Wformat_zero_length,
1057 "-Wformat-zero-length ignored without -Wformat");
1058 warning (OPT_Wformat_nonliteral,
1059 "-Wformat-nonliteral ignored without -Wformat");
1060 warning (OPT_Wformat_security,
1061 "-Wformat-security ignored without -Wformat");
1064 /* C99 requires special handling of complex multiplication and division;
1065 -ffast-math and -fcx-limited-range are handled in process_options. */
1067 flag_complex_method = 2;
1069 if (flag_preprocess_only)
1071 /* Open the output now. We must do so even if flag_no_output is
1072 on, because there may be other output than from the actual
1073 preprocessing (e.g. from -dM). */
1074 if (out_fname[0] == '\0')
1075 out_stream = stdout;
1077 out_stream = fopen (out_fname, "w");
1079 if (out_stream == NULL)
1081 fatal_error ("opening output file %s: %m", out_fname);
1085 if (num_in_fnames > 1)
1086 error ("too many filenames given. Type %s --help for usage",
1089 init_pp_output (out_stream);
1095 /* Yuk. WTF is this? I do know ObjC relies on it somewhere. */
1096 input_location = UNKNOWN_LOCATION;
1099 cb = cpp_get_callbacks (parse_in);
1100 cb->file_change = cb_file_change;
1101 cb->dir_change = cb_dir_change;
1102 cpp_post_options (parse_in);
1104 input_location = UNKNOWN_LOCATION;
1106 /* If an error has occurred in cpplib, note it so we fail
1108 errorcount += cpp_errors (parse_in);
1110 *pfilename = this_input_filename
1111 = cpp_read_main_file (parse_in, in_fnames[0]);
1112 /* Don't do any compilation or preprocessing if there is no input file. */
1113 if (this_input_filename == NULL)
1119 if (flag_working_directory
1120 && flag_preprocess_only && !flag_no_line_commands)
1121 pp_dir_change (parse_in, get_src_pwd ());
1123 return flag_preprocess_only;
1126 /* Front end initialization common to C, ObjC and C++. */
1128 c_common_init (void)
1130 /* Set up preprocessor arithmetic. Must be done after call to
1131 c_common_nodes_and_builtins for type nodes to be good. */
1132 cpp_opts->precision = TYPE_PRECISION (intmax_type_node);
1133 cpp_opts->char_precision = TYPE_PRECISION (char_type_node);
1134 cpp_opts->int_precision = TYPE_PRECISION (integer_type_node);
1135 cpp_opts->wchar_precision = TYPE_PRECISION (wchar_type_node);
1136 cpp_opts->unsigned_wchar = TYPE_UNSIGNED (wchar_type_node);
1137 cpp_opts->bytes_big_endian = BYTES_BIG_ENDIAN;
1139 /* This can't happen until after wchar_precision and bytes_big_endian
1141 cpp_init_iconv (parse_in);
1144 c_common_print_pch_checksum (stderr);
1146 if (flag_preprocess_only)
1149 preprocess_file (parse_in);
1153 /* Has to wait until now so that cpplib has its hash table. */
1159 /* Initialize the integrated preprocessor after debug output has been
1160 initialized; loop over each input file. */
1162 c_common_parse_file (int set_yydebug)
1166 /* Enable parser debugging, if requested and we can. If requested
1167 and we can't, notify the user. */
1169 yydebug = set_yydebug;
1172 warning (0, "YYDEBUG was not defined at build time, -dy ignored");
1178 /* Start the main input file, if the debug writer wants it. */
1179 if (debug_hooks->start_end_main_source_file)
1180 (*debug_hooks->start_source_file) (0, this_input_filename);
1187 /* And end the main input file, if the debug writer wants it */
1188 if (debug_hooks->start_end_main_source_file)
1189 (*debug_hooks->end_source_file) (0);
1190 if (++i >= num_in_fnames)
1192 cpp_undef_all (parse_in);
1194 = cpp_read_main_file (parse_in, in_fnames[i]);
1195 /* If an input file is missing, abandon further compilation.
1196 cpplib has issued a diagnostic. */
1197 if (!this_input_filename)
1202 /* Common finish hook for the C, ObjC and C++ front ends. */
1204 c_common_finish (void)
1206 FILE *deps_stream = NULL;
1208 if (cpp_opts->deps.style != DEPS_NONE)
1210 /* If -M or -MM was seen without -MF, default output to the
1213 deps_stream = out_stream;
1216 deps_stream = fopen (deps_file, deps_append ? "a": "w");
1218 fatal_error ("opening dependency file %s: %m", deps_file);
1222 /* For performance, avoid tearing down cpplib's internal structures
1223 with cpp_destroy (). */
1224 errorcount += cpp_finish (parse_in, deps_stream);
1226 if (deps_stream && deps_stream != out_stream
1227 && (ferror (deps_stream) || fclose (deps_stream)))
1228 fatal_error ("closing dependency file %s: %m", deps_file);
1230 if (out_stream && (ferror (out_stream) || fclose (out_stream)))
1231 fatal_error ("when writing output to %s: %m", out_fname);
1234 /* Either of two environment variables can specify output of
1235 dependencies. Their value is either "OUTPUT_FILE" or "OUTPUT_FILE
1236 DEPS_TARGET", where OUTPUT_FILE is the file to write deps info to
1237 and DEPS_TARGET is the target to mention in the deps. They also
1238 result in dependency information being appended to the output file
1239 rather than overwriting it, and like Sun's compiler
1240 SUNPRO_DEPENDENCIES suppresses the dependency on the main file. */
1242 check_deps_environment_vars (void)
1246 GET_ENVIRONMENT (spec, "DEPENDENCIES_OUTPUT");
1248 cpp_opts->deps.style = DEPS_USER;
1251 GET_ENVIRONMENT (spec, "SUNPRO_DEPENDENCIES");
1254 cpp_opts->deps.style = DEPS_SYSTEM;
1255 cpp_opts->deps.ignore_main_file = true;
1261 /* Find the space before the DEPS_TARGET, if there is one. */
1262 char *s = strchr (spec, ' ');
1265 /* Let the caller perform MAKE quoting. */
1266 defer_opt (OPT_MT, s + 1);
1270 /* Command line -MF overrides environment variables and default. */
1279 /* Handle deferred command line switches. */
1281 handle_deferred_opts (void)
1286 /* Avoid allocating the deps buffer if we don't need it.
1287 (This flag may be true without there having been -MT or -MQ
1288 options, but we'll still need the deps buffer.) */
1292 deps = cpp_get_deps (parse_in);
1294 for (i = 0; i < deferred_count; i++)
1296 struct deferred_opt *opt = &deferred_opts[i];
1298 if (opt->code == OPT_MT || opt->code == OPT_MQ)
1299 deps_add_target (deps, opt->arg, opt->code == OPT_MQ);
1303 /* These settings are appropriate for GCC, but not necessarily so for
1304 cpplib as a library. */
1306 sanitize_cpp_opts (void)
1308 /* If we don't know what style of dependencies to output, complain
1309 if any other dependency switches have been given. */
1310 if (deps_seen && cpp_opts->deps.style == DEPS_NONE)
1311 error ("to generate dependencies you must specify either -M or -MM");
1313 /* -dM and dependencies suppress normal output; do it here so that
1314 the last -d[MDN] switch overrides earlier ones. */
1315 if (flag_dump_macros == 'M')
1318 /* Disable -dD, -dN and -dI if normal output is suppressed. Allow
1319 -dM since at least glibc relies on -M -dM to work. */
1320 /* Also, flag_no_output implies flag_no_line_commands, always. */
1323 if (flag_dump_macros != 'M')
1324 flag_dump_macros = 0;
1325 flag_dump_includes = 0;
1326 flag_no_line_commands = 1;
1329 cpp_opts->unsigned_char = !flag_signed_char;
1330 cpp_opts->stdc_0_in_system_headers = STDC_0_IN_SYSTEM_HEADERS;
1332 /* We want -Wno-long-long to override -pedantic -std=non-c99
1333 and/or -Wtraditional, whatever the ordering. */
1334 cpp_opts->warn_long_long
1335 = warn_long_long && ((!flag_isoc99 && pedantic) || warn_traditional);
1337 /* Similarly with -Wno-variadic-macros. No check for c99 here, since
1338 this also turns off warnings about GCCs extension. */
1339 cpp_opts->warn_variadic_macros
1340 = warn_variadic_macros && (pedantic || warn_traditional);
1342 /* If we're generating preprocessor output, emit current directory
1343 if explicitly requested or if debugging information is enabled.
1344 ??? Maybe we should only do it for debugging formats that
1345 actually output the current directory? */
1346 if (flag_working_directory == -1)
1347 flag_working_directory = (debug_info_level != DINFO_LEVEL_NONE);
1350 /* Add include path with a prefix at the front of its name. */
1352 add_prefixed_path (const char *suffix, size_t chain)
1356 size_t prefix_len, suffix_len;
1358 suffix_len = strlen (suffix);
1359 prefix = iprefix ? iprefix : cpp_GCC_INCLUDE_DIR;
1360 prefix_len = iprefix ? strlen (iprefix) : cpp_GCC_INCLUDE_DIR_len;
1362 path = (char *) xmalloc (prefix_len + suffix_len + 1);
1363 memcpy (path, prefix, prefix_len);
1364 memcpy (path + prefix_len, suffix, suffix_len);
1365 path[prefix_len + suffix_len] = '\0';
1367 add_path (path, chain, 0, false);
1370 /* Handle -D, -U, -A, -imacros, and the first -include. */
1372 finish_options (void)
1374 if (!cpp_opts->preprocessed)
1378 cb_file_change (parse_in,
1379 linemap_add (&line_table, LC_RENAME, 0,
1380 _("<built-in>"), 0));
1382 cpp_init_builtins (parse_in, flag_hosted);
1383 c_cpp_builtins (parse_in);
1385 /* We're about to send user input to cpplib, so make it warn for
1386 things that we previously (when we sent it internal definitions)
1387 told it to not warn.
1389 C99 permits implementation-defined characters in identifiers.
1390 The documented meaning of -std= is to turn off extensions that
1391 conflict with the specified standard, and since a strictly
1392 conforming program cannot contain a '$', we do not condition
1393 their acceptance on the -std= setting. */
1394 cpp_opts->warn_dollars = (cpp_opts->pedantic && !cpp_opts->c99);
1396 cb_file_change (parse_in,
1397 linemap_add (&line_table, LC_RENAME, 0,
1398 _("<command-line>"), 0));
1400 for (i = 0; i < deferred_count; i++)
1402 struct deferred_opt *opt = &deferred_opts[i];
1404 if (opt->code == OPT_D)
1405 cpp_define (parse_in, opt->arg);
1406 else if (opt->code == OPT_U)
1407 cpp_undef (parse_in, opt->arg);
1408 else if (opt->code == OPT_A)
1410 if (opt->arg[0] == '-')
1411 cpp_unassert (parse_in, opt->arg + 1);
1413 cpp_assert (parse_in, opt->arg);
1417 /* Handle -imacros after -D and -U. */
1418 for (i = 0; i < deferred_count; i++)
1420 struct deferred_opt *opt = &deferred_opts[i];
1422 if (opt->code == OPT_imacros
1423 && cpp_push_include (parse_in, opt->arg))
1425 /* Disable push_command_line_include callback for now. */
1426 include_cursor = deferred_count + 1;
1427 cpp_scan_nooutput (parse_in);
1433 push_command_line_include ();
1436 /* Give CPP the next file given by -include, if any. */
1438 push_command_line_include (void)
1440 while (include_cursor < deferred_count)
1442 struct deferred_opt *opt = &deferred_opts[include_cursor++];
1444 if (!cpp_opts->preprocessed && opt->code == OPT_include
1445 && cpp_push_include (parse_in, opt->arg))
1449 if (include_cursor == deferred_count)
1452 /* -Wunused-macros should only warn about macros defined hereafter. */
1453 cpp_opts->warn_unused_macros = warn_unused_macros;
1454 /* Restore the line map from <command line>. */
1455 if (!cpp_opts->preprocessed)
1456 cpp_change_file (parse_in, LC_RENAME, this_input_filename);
1458 /* Set this here so the client can change the option if it wishes,
1459 and after stacking the main file so we don't trace the main file. */
1460 line_table.trace_includes = cpp_opts->print_include_names;
1464 /* File change callback. Has to handle -include files. */
1466 cb_file_change (cpp_reader * ARG_UNUSED (pfile),
1467 const struct line_map *new_map)
1469 if (flag_preprocess_only)
1470 pp_file_change (new_map);
1472 fe_file_change (new_map);
1474 if (new_map == 0 || (new_map->reason == LC_LEAVE && MAIN_FILE_P (new_map)))
1475 push_command_line_include ();
1479 cb_dir_change (cpp_reader * ARG_UNUSED (pfile), const char *dir)
1481 if (!set_src_pwd (dir))
1482 warning (0, "too late for # directive to set debug directory");
1485 /* Set the C 89 standard (with 1994 amendments if C94, without GNU
1486 extensions if ISO). There is no concept of gnu94. */
1488 set_std_c89 (int c94, int iso)
1490 cpp_set_lang (parse_in, c94 ? CLK_STDC94: iso ? CLK_STDC89: CLK_GNUC89);
1493 flag_no_gnu_keywords = iso;
1494 flag_no_nonansi_builtin = iso;
1499 /* Set the C 99 standard (without GNU extensions if ISO). */
1501 set_std_c99 (int iso)
1503 cpp_set_lang (parse_in, iso ? CLK_STDC99: CLK_GNUC99);
1505 flag_no_nonansi_builtin = iso;
1511 /* Set the C++ 98 standard (without GNU extensions if ISO). */
1513 set_std_cxx98 (int iso)
1515 cpp_set_lang (parse_in, iso ? CLK_CXX98: CLK_GNUCXX);
1516 flag_no_gnu_keywords = iso;
1517 flag_no_nonansi_builtin = iso;
1521 /* Handle setting implicit to ON. */
1523 set_Wimplicit (int on)
1526 warn_implicit_int = on;
1529 if (mesg_implicit_function_declaration != 2)
1530 mesg_implicit_function_declaration = 1;
1533 mesg_implicit_function_declaration = 0;
1536 /* Args to -d specify what to dump. Silently ignore
1537 unrecognized options; they may be aimed at toplev.c. */
1539 handle_OPT_d (const char *arg)
1543 while ((c = *arg++) != '\0')
1546 case 'M': /* Dump macros only. */
1547 case 'N': /* Dump names. */
1548 case 'D': /* Dump definitions. */
1549 flag_dump_macros = c;
1553 flag_dump_includes = 1;