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
24 /* Merged C99 inline changes from gcc trunk 122565 2007-03-05 */
28 #include "coretypes.h"
35 #include "langhooks.h"
36 #include "tree-inline.h"
37 #include "diagnostic.h"
39 #include "cppdefault.h"
40 #include "c-incpath.h"
41 #include "debug.h" /* For debug_hooks. */
46 #ifndef DOLLARS_IN_IDENTIFIERS
47 # define DOLLARS_IN_IDENTIFIERS true
50 #ifndef TARGET_SYSTEM_ROOT
51 # define TARGET_SYSTEM_ROOT NULL
55 #define TARGET_OPTF(ARG)
59 static cpp_options *cpp_opts;
62 static const char *this_input_filename;
64 /* Filename and stream for preprocessed output. */
65 static const char *out_fname;
66 static FILE *out_stream;
68 /* Append dependencies to deps_file. */
69 static bool deps_append;
71 /* If dependency switches (-MF etc.) have been given. */
72 static bool deps_seen;
77 /* If -lang-fortran seen. */
78 static bool lang_fortran = false;
80 /* Dependency output file. */
81 static const char *deps_file;
83 /* The prefix given by -iprefix, if any. */
84 static const char *iprefix;
86 /* The multilib directory given by -imultilib, if any. */
87 static const char *imultilib;
89 /* The system root, if any. Overridden by -isysroot. */
90 static const char *sysroot = TARGET_SYSTEM_ROOT;
92 /* Zero disables all standard directories for headers. */
93 static bool std_inc = true;
95 /* Zero disables the C++-specific standard directories for headers. */
96 static bool std_cxx_inc = true;
98 /* If the quote chain has been split by -I-. */
99 static bool quote_chain_split;
101 /* If -Wunused-macros. */
102 static bool warn_unused_macros;
104 /* If -Wvariadic-macros. */
105 static bool warn_variadic_macros = true;
107 /* Number of deferred options. */
108 static size_t deferred_count;
110 /* Number of deferred options scanned for -include. */
111 static size_t include_cursor;
113 static void set_Wimplicit (int);
114 static void handle_OPT_d (const char *);
115 static void set_std_cxx98 (int);
116 static void set_std_c89 (int, int);
117 static void set_std_c99 (int);
118 static void check_deps_environment_vars (void);
119 static void handle_deferred_opts (void);
120 static void sanitize_cpp_opts (void);
121 static void add_prefixed_path (const char *, size_t);
122 static void push_command_line_include (void);
123 static void cb_file_change (cpp_reader *, const struct line_map *);
124 static void cb_dir_change (cpp_reader *, const char *);
125 static void finish_options (void);
127 #ifndef STDC_0_IN_SYSTEM_HEADERS
128 #define STDC_0_IN_SYSTEM_HEADERS 0
131 /* Holds switches parsed by c_common_handle_option (), but whose
132 handling is deferred to c_common_post_options (). */
133 static void defer_opt (enum opt_code, const char *);
134 static struct deferred_opt
140 /* Complain that switch CODE expects an argument but none was
141 provided. OPT was the command-line option. Return FALSE to get
142 the default message in opts.c, TRUE if we provide a specialized
145 c_common_missing_argument (const char *opt, size_t code)
150 /* Pick up the default message. */
153 case OPT_fconstant_string_class_:
154 error ("no class name specified with %qs", opt);
158 error ("assertion missing after %qs", opt);
163 error ("macro name missing after %qs", opt);
172 error ("missing path after %qs", opt);
181 error ("missing filename after %qs", opt);
186 error ("missing makefile target after %qs", opt);
193 /* Defer option CODE with argument ARG. */
195 defer_opt (enum opt_code code, const char *arg)
197 deferred_opts[deferred_count].code = code;
198 deferred_opts[deferred_count].arg = arg;
202 /* Common initialization before parsing options. */
204 c_common_init_options (unsigned int argc, const char **argv)
206 static const unsigned int lang_flags[] = {CL_C, CL_ObjC, CL_CXX, CL_ObjCXX};
207 unsigned int i, result;
209 /* This is conditionalized only because that is the way the front
210 ends used to do it. Maybe this should be unconditional? */
211 if (c_dialect_cxx ())
213 /* By default wrap lines at 80 characters. Is getenv
214 ("COLUMNS") preferable? */
215 diagnostic_line_cutoff (global_dc) = 80;
216 /* By default, emit location information once for every
217 diagnostic message. */
218 diagnostic_prefixing_rule (global_dc) = DIAGNOSTICS_SHOW_PREFIX_ONCE;
221 parse_in = cpp_create_reader (c_dialect_cxx () ? CLK_GNUCXX: CLK_GNUC89,
222 ident_hash, &line_table);
224 cpp_opts = cpp_get_options (parse_in);
225 cpp_opts->dollars_in_ident = DOLLARS_IN_IDENTIFIERS;
226 cpp_opts->objc = c_dialect_objc ();
228 /* Reset to avoid warnings on internal definitions. We set it just
229 before passing on command-line options to cpplib. */
230 cpp_opts->warn_dollars = 0;
232 flag_exceptions = c_dialect_cxx ();
233 warn_pointer_arith = c_dialect_cxx ();
234 warn_write_strings = c_dialect_cxx();
236 deferred_opts = XNEWVEC (struct deferred_opt, argc);
238 result = lang_flags[c_language];
240 if (c_language == clk_c)
242 /* If preprocessing assembly language, accept any of the C-family
243 front end options since the driver may pass them through. */
244 for (i = 1; i < argc; i++)
245 if (! strcmp (argv[i], "-lang-asm"))
247 result |= CL_C | CL_ObjC | CL_CXX | CL_ObjCXX;
252 for (i = 1; i < argc; i++)
253 if (! strcmp (argv[i], "-lang-fortran"))
255 result |= CL_Fortran;
264 /* Handle switch SCODE with argument ARG. VALUE is true, unless no-
265 form of an -f or -W option was given. Returns 0 if the switch was
266 invalid, a negative number to prevent language-independent
267 processing in toplev.c (a hack necessary for the short-term). */
269 c_common_handle_option (size_t scode, const char *arg, int value)
271 const struct cl_option *option = &cl_options[scode];
272 enum opt_code code = (enum opt_code) scode;
275 /* Prevent resetting the language standard to a C dialect when the driver
276 has already determined that we're looking at assembler input. */
277 bool preprocessing_asm_p = (cpp_get_options (parse_in)->lang == CLK_ASM);
282 if (cl_options[code].flags & (CL_C | CL_CXX | CL_ObjC | CL_ObjCXX))
285 if (lang_fortran && (cl_options[code].flags & (CL_Fortran)))
291 case OPT__output_pch_:
296 defer_opt (code, arg);
300 cpp_opts->discard_comments = 0;
304 cpp_opts->discard_comments = 0;
305 cpp_opts->discard_comments_in_macro_exp = 0;
309 defer_opt (code, arg);
313 flag_preprocess_only = 1;
317 cpp_opts->print_include_names = 1;
321 TARGET_OPTF (xstrdup (arg));
325 if (strcmp (arg, "-"))
326 add_path (xstrdup (arg), BRACKET, 0, true);
329 if (quote_chain_split)
330 error ("-I- specified twice");
331 quote_chain_split = true;
332 split_quote_chain ();
333 inform ("obsolete option -I- used, please use -iquote instead");
339 /* When doing dependencies with -M or -MM, suppress normal
340 preprocessed output, but still do -dM etc. as software
341 depends on this. Preprocessed output does occur if -MD, -MMD
342 or environment var dependency generation is used. */
343 cpp_opts->deps.style = (code == OPT_M ? DEPS_SYSTEM: DEPS_USER);
345 cpp_opts->inhibit_warnings = 1;
350 cpp_opts->deps.style = (code == OPT_MD ? DEPS_SYSTEM: DEPS_USER);
361 cpp_opts->deps.missing_files = true;
366 cpp_opts->deps.phony_targets = true;
372 defer_opt (code, arg);
376 flag_no_line_commands = 1;
379 case OPT_fworking_directory:
380 flag_working_directory = value;
384 defer_opt (code, arg);
388 /* APPLE LOCAL -Wmost */
392 set_Wimplicit (value);
393 warn_char_subscripts = value;
394 warn_missing_braces = value;
395 /* APPLE LOCAL begin -Wmost --dpatel */
396 if (code != OPT_Wmost)
397 warn_parentheses = value;
398 /* APPLE LOCAL end -Wmost --dpatel */
399 warn_return_type = value;
400 warn_sequence_point = value; /* Was C only. */
401 if (c_dialect_cxx ())
402 warn_sign_compare = value;
404 set_warn_strict_aliasing (value);
405 warn_strict_overflow = value;
406 warn_address = value;
408 /* Only warn about unknown pragmas that are not in system
410 warn_unknown_pragmas = value;
412 /* We save the value of warn_uninitialized, since if they put
413 -Wuninitialized on the command line, we need to generate a
414 warning about not using it without also specifying -O. */
415 if (warn_uninitialized != 1)
416 warn_uninitialized = (value ? 2 : 0);
418 if (!c_dialect_cxx ())
419 /* We set this to 2 here, but 1 in -Wmain, so -ffreestanding
420 can turn it off only if it's not explicit. */
421 warn_main = value * 2;
424 /* C++-specific warnings. */
425 warn_reorder = value;
426 warn_nontemplate_friend = value;
429 cpp_opts->warn_trigraphs = value;
430 cpp_opts->warn_comments = value;
431 cpp_opts->warn_num_sign_change = value;
432 cpp_opts->warn_multichar = value; /* Was C++ only. */
434 if (warn_pointer_sign == -1)
435 warn_pointer_sign = 1;
440 cpp_opts->warn_comments = value;
443 case OPT_Wdeprecated:
444 cpp_opts->warn_deprecated = value;
447 case OPT_Wendif_labels:
448 cpp_opts->warn_endif_labels = value;
452 cpp_opts->warnings_are_errors = value;
453 global_dc->warning_as_error_requested = value;
456 case OPT_Werror_implicit_function_declaration:
457 mesg_implicit_function_declaration = 2;
465 set_Wformat (atoi (arg));
469 set_Wimplicit (value);
473 /* Silently ignore for now. */
476 case OPT_Winvalid_pch:
477 cpp_opts->warn_invalid_pch = value;
487 case OPT_Wmissing_include_dirs:
488 cpp_opts->warn_missing_include_dirs = value;
492 cpp_opts->warn_multichar = value;
495 /* APPLE LOCAL begin -Wnewline-eof */
496 case OPT_Wnewline_eof:
497 cpp_opts->warn_newline_at_eof = value;
499 /* APPLE LOCAL end -Wnewline-eof */
501 case OPT_Wnormalized_:
502 if (!value || (arg && strcasecmp (arg, "none") == 0))
503 cpp_opts->warn_normalize = normalized_none;
504 else if (!arg || strcasecmp (arg, "nfkc") == 0)
505 cpp_opts->warn_normalize = normalized_KC;
506 else if (strcasecmp (arg, "id") == 0)
507 cpp_opts->warn_normalize = normalized_identifier_C;
508 else if (strcasecmp (arg, "nfc") == 0)
509 cpp_opts->warn_normalize = normalized_C;
511 error ("argument %qs to %<-Wnormalized%> not recognized", arg);
514 case OPT_Wreturn_type:
515 warn_return_type = value;
518 case OPT_Wstrict_null_sentinel:
519 warn_strict_null_sentinel = value;
522 case OPT_Wsystem_headers:
523 cpp_opts->warn_system_headers = value;
526 case OPT_Wtraditional:
527 cpp_opts->warn_traditional = value;
531 cpp_opts->warn_trigraphs = value;
535 cpp_opts->warn_undef = value;
538 case OPT_Wunknown_pragmas:
539 /* Set to greater than 1, so that even unknown pragmas in
540 system headers will be warned about. */
541 warn_unknown_pragmas = value * 2;
544 case OPT_Wunused_macros:
545 warn_unused_macros = value;
548 case OPT_Wvariadic_macros:
549 warn_variadic_macros = value;
552 case OPT_Wwrite_strings:
553 warn_write_strings = value;
559 warn_nonvdtor = true;
563 if (!c_dialect_cxx ())
564 set_std_c89 (false, true);
566 set_std_cxx98 (true);
573 case OPT_fcond_mismatch:
574 if (!c_dialect_cxx ())
576 flag_cond_mismatch = value;
581 case OPT_fall_virtual:
582 case OPT_falt_external_templates:
583 case OPT_fenum_int_equiv:
584 case OPT_fexternal_templates:
585 case OPT_fguiding_decls:
587 case OPT_fhuge_objects:
589 case OPT_fname_mangling_version_:
591 case OPT_fnonnull_objects:
593 case OPT_fstrict_prototype:
594 case OPT_fthis_is_variable:
595 case OPT_fvtable_thunks:
598 warning (0, "switch %qs is no longer supported", option->opt_text);
601 case OPT_faccess_control:
602 flag_access_control = value;
606 flag_no_asm = !value;
610 flag_no_builtin = !value;
617 disable_builtin_function (arg);
620 case OPT_fdirectives_only:
621 cpp_opts->directives_only = 1;
624 case OPT_fdollars_in_identifiers:
625 cpp_opts->dollars_in_ident = value;
628 case OPT_ffreestanding:
630 /* Fall through.... */
633 flag_no_builtin = !value;
634 /* warn_main will be 2 if set by -Wall, 1 if set by -Wmain */
635 if (!value && warn_main == 2)
639 case OPT_fshort_double:
640 flag_short_double = value;
643 case OPT_fshort_enums:
644 flag_short_enums = value;
647 case OPT_fshort_wchar:
648 flag_short_wchar = value;
651 case OPT_fsigned_bitfields:
652 flag_signed_bitfields = value;
655 case OPT_fsigned_char:
656 flag_signed_char = value;
659 case OPT_funsigned_bitfields:
660 flag_signed_bitfields = !value;
663 case OPT_funsigned_char:
664 flag_signed_char = !value;
668 flag_check_new = value;
671 case OPT_fconserve_space:
672 flag_conserve_space = value;
675 case OPT_fconstant_string_class_:
676 constant_string_class_name = arg;
679 case OPT_fdefault_inline:
680 flag_default_inline = value;
683 case OPT_felide_constructors:
684 flag_elide_constructors = value;
687 case OPT_fenforce_eh_specs:
688 flag_enforce_eh_specs = value;
691 case OPT_fextended_identifiers:
692 cpp_opts->extended_identifiers = value;
696 flag_new_for_scope = value;
699 case OPT_fgnu_keywords:
700 flag_no_gnu_keywords = !value;
703 case OPT_fgnu_runtime:
704 flag_next_runtime = !value;
707 case OPT_fhandle_exceptions:
708 warning (0, "-fhandle-exceptions has been renamed -fexceptions (and is now on by default)");
709 flag_exceptions = value;
712 case OPT_fimplement_inlines:
713 flag_implement_inlines = value;
716 case OPT_fimplicit_inline_templates:
717 flag_implicit_inline_templates = value;
720 case OPT_fimplicit_templates:
721 flag_implicit_templates = value;
724 case OPT_flax_vector_conversions:
725 flag_lax_vector_conversions = value;
728 case OPT_fms_extensions:
729 flag_ms_extensions = value;
732 case OPT_fnext_runtime:
733 flag_next_runtime = value;
736 case OPT_fnil_receivers:
737 flag_nil_receivers = value;
740 case OPT_fnonansi_builtins:
741 flag_no_nonansi_builtin = !value;
744 case OPT_foperator_names:
745 cpp_opts->operator_names = value;
748 case OPT_foptional_diags:
749 flag_optional_diags = value;
753 cpp_opts->restore_pch_deps = value;
756 case OPT_fpch_preprocess:
757 flag_pch_preprocess = value;
760 case OPT_fpermissive:
761 flag_permissive = value;
764 case OPT_fpreprocessed:
765 cpp_opts->preprocessed = value;
768 case OPT_freplace_objc_classes:
769 flag_replace_objc_classes = value;
773 flag_use_repository = value;
775 flag_implicit_templates = 0;
782 case OPT_fshow_column:
783 cpp_opts->show_column = value;
787 flag_detailed_statistics = value;
791 /* It is documented that we silently ignore silly values. */
792 if (value >= 1 && value <= 100)
793 cpp_opts->tabstop = value;
796 case OPT_fexec_charset_:
797 cpp_opts->narrow_charset = arg;
800 case OPT_fwide_exec_charset_:
801 cpp_opts->wide_charset = arg;
804 case OPT_finput_charset_:
805 cpp_opts->input_charset = arg;
808 case OPT_ftemplate_depth_:
809 max_tinst_depth = value;
812 case OPT_fuse_cxa_atexit:
813 flag_use_cxa_atexit = value;
816 case OPT_fuse_cxa_get_exception_ptr:
817 flag_use_cxa_get_exception_ptr = value;
820 case OPT_fvisibility_inlines_hidden:
821 visibility_options.inlines_hidden = value;
828 case OPT_fthreadsafe_statics:
829 flag_threadsafe_statics = value;
833 flag_zero_link = value;
837 flag_gen_declaration = 1;
840 case OPT_femit_struct_debug_baseonly:
841 set_struct_debug_option ("base");
844 case OPT_femit_struct_debug_reduced:
845 set_struct_debug_option ("dir:ord:sys,dir:gen:any,ind:base");
848 case OPT_femit_struct_debug_detailed_:
849 set_struct_debug_option (arg);
853 add_path (xstrdup (arg), AFTER, 0, true);
858 defer_opt (code, arg);
870 add_path (xstrdup (arg), QUOTE, 0, true);
878 add_path (xstrdup (arg), SYSTEM, 0, true);
881 case OPT_iwithprefix:
882 add_prefixed_path (arg, SYSTEM);
885 case OPT_iwithprefixbefore:
886 add_prefixed_path (arg, BRACKET);
890 cpp_set_lang (parse_in, CLK_ASM);
891 cpp_opts->dollars_in_ident = false;
894 case OPT_lang_fortran:
914 error ("output filename specified twice");
917 /* We need to handle the -pedantic switches here, rather than in
918 c_common_post_options, so that a subsequent -Wno-endif-labels
919 is not overridden. */
920 case OPT_pedantic_errors:
921 cpp_opts->pedantic_errors = 1;
924 cpp_opts->pedantic = 1;
925 cpp_opts->warn_endif_labels = 1;
926 if (warn_pointer_sign == -1)
927 warn_pointer_sign = 1;
928 if (warn_overlength_strings == -1)
929 warn_overlength_strings = 1;
932 case OPT_print_objc_runtime_info:
933 print_struct_values = 1;
936 case OPT_print_pch_checksum:
937 c_common_print_pch_checksum (stdout);
938 exit_after_options = true;
946 case OPT_std_gnu__98:
947 if (!preprocessing_asm_p)
948 set_std_cxx98 (code == OPT_std_c__98 /* ISO */);
952 case OPT_std_iso9899_1990:
953 case OPT_std_iso9899_199409:
954 if (!preprocessing_asm_p)
955 set_std_c89 (code == OPT_std_iso9899_199409 /* c94 */, true /* ISO */);
959 if (!preprocessing_asm_p)
960 set_std_c89 (false /* c94 */, false /* ISO */);
965 case OPT_std_iso9899_1999:
966 case OPT_std_iso9899_199x:
967 if (!preprocessing_asm_p)
968 set_std_c99 (true /* ISO */);
973 if (!preprocessing_asm_p)
974 set_std_c99 (false /* ISO */);
978 cpp_opts->trigraphs = 1;
981 case OPT_traditional_cpp:
982 cpp_opts->traditional = 1;
990 cpp_opts->inhibit_warnings = 1;
1001 /* Post-switch processing. */
1003 c_common_post_options (const char **pfilename)
1005 struct cpp_callbacks *cb;
1007 /* Canonicalize the input and output filenames. */
1008 if (in_fnames == NULL)
1010 in_fnames = XNEWVEC (const char *, 1);
1013 else if (strcmp (in_fnames[0], "-") == 0)
1016 if (out_fname == NULL || !strcmp (out_fname, "-"))
1019 if (cpp_opts->deps.style == DEPS_NONE)
1020 check_deps_environment_vars ();
1022 handle_deferred_opts ();
1024 sanitize_cpp_opts ();
1026 register_include_chains (parse_in, sysroot, iprefix, imultilib,
1027 std_inc, std_cxx_inc && c_dialect_cxx (), verbose);
1029 #ifdef C_COMMON_OVERRIDE_OPTIONS
1030 /* Some machines may reject certain combinations of C
1031 language-specific options. */
1032 C_COMMON_OVERRIDE_OPTIONS;
1035 flag_inline_trees = 1;
1037 /* Use tree inlining. */
1038 if (!flag_no_inline)
1040 if (flag_inline_functions)
1041 flag_inline_trees = 2;
1043 /* APPLE LOCAL begin radar 5811887 - radar 6084601 */
1044 /* In all flavors of c99, except for ObjC/ObjC++, blocks are off by default
1045 unless requested via -fblocks. */
1046 if (flag_blocks == -1 && flag_iso && !c_dialect_objc())
1048 /* APPLE LOCAL end radar 5811887 - radar 6084601 */
1050 /* By default we use C99 inline semantics in GNU99 or C99 mode. C99
1051 inline semantics are not supported in GNU89 or C89 mode. */
1052 if (flag_gnu89_inline == -1)
1053 flag_gnu89_inline = !flag_isoc99;
1054 else if (!flag_gnu89_inline && !flag_isoc99)
1055 error ("-fno-gnu89-inline is only supported in GNU99 or C99 mode");
1057 /* If we are given more than one input file, we must use
1058 unit-at-a-time mode. */
1059 if (num_in_fnames > 1)
1060 flag_unit_at_a_time = 1;
1062 /* Default to ObjC sjlj exception handling if NeXT runtime. */
1063 if (flag_objc_sjlj_exceptions < 0)
1064 flag_objc_sjlj_exceptions = flag_next_runtime;
1065 if (flag_objc_exceptions && !flag_objc_sjlj_exceptions)
1066 flag_exceptions = 1;
1068 /* -Wextra implies -Wsign-compare, -Wmissing-field-initializers and
1069 -Woverride-init, but not if explicitly overridden. */
1070 if (warn_sign_compare == -1)
1071 warn_sign_compare = extra_warnings;
1072 if (warn_missing_field_initializers == -1)
1073 warn_missing_field_initializers = extra_warnings;
1074 if (warn_override_init == -1)
1075 warn_override_init = extra_warnings;
1077 /* -Wpointer_sign is disabled by default, but it is enabled if any
1078 of -Wall or -pedantic are given. */
1079 if (warn_pointer_sign == -1)
1080 warn_pointer_sign = 0;
1082 /* -Woverlength-strings is off by default, but is enabled by -pedantic.
1083 It is never enabled in C++, as the minimum limit is not normative
1084 in that standard. */
1085 if (warn_overlength_strings == -1 || c_dialect_cxx ())
1086 warn_overlength_strings = 0;
1088 /* Special format checking options don't work without -Wformat; warn if
1092 warning (OPT_Wformat_y2k,
1093 "-Wformat-y2k ignored without -Wformat");
1094 warning (OPT_Wformat_extra_args,
1095 "-Wformat-extra-args ignored without -Wformat");
1096 warning (OPT_Wformat_zero_length,
1097 "-Wformat-zero-length ignored without -Wformat");
1098 warning (OPT_Wformat_nonliteral,
1099 "-Wformat-nonliteral ignored without -Wformat");
1100 warning (OPT_Wformat_security,
1101 "-Wformat-security ignored without -Wformat");
1104 /* C99 requires special handling of complex multiplication and division;
1105 -ffast-math and -fcx-limited-range are handled in process_options. */
1107 flag_complex_method = 2;
1109 if (flag_preprocess_only)
1111 /* Open the output now. We must do so even if flag_no_output is
1112 on, because there may be other output than from the actual
1113 preprocessing (e.g. from -dM). */
1114 if (out_fname[0] == '\0')
1115 out_stream = stdout;
1117 out_stream = fopen (out_fname, "w");
1119 if (out_stream == NULL)
1121 fatal_error ("opening output file %s: %m", out_fname);
1125 if (num_in_fnames > 1)
1126 error ("too many filenames given. Type %s --help for usage",
1129 init_pp_output (out_stream);
1135 /* Yuk. WTF is this? I do know ObjC relies on it somewhere. */
1136 input_location = UNKNOWN_LOCATION;
1139 cb = cpp_get_callbacks (parse_in);
1140 cb->file_change = cb_file_change;
1141 cb->dir_change = cb_dir_change;
1142 cpp_post_options (parse_in);
1144 input_location = UNKNOWN_LOCATION;
1146 /* If an error has occurred in cpplib, note it so we fail
1148 errorcount += cpp_errors (parse_in);
1150 *pfilename = this_input_filename
1151 = cpp_read_main_file (parse_in, in_fnames[0]);
1152 /* Don't do any compilation or preprocessing if there is no input file. */
1153 if (this_input_filename == NULL)
1159 if (flag_working_directory
1160 && flag_preprocess_only && !flag_no_line_commands)
1161 pp_dir_change (parse_in, get_src_pwd ());
1163 return flag_preprocess_only;
1166 /* Front end initialization common to C, ObjC and C++. */
1168 c_common_init (void)
1170 /* Set up preprocessor arithmetic. Must be done after call to
1171 c_common_nodes_and_builtins for type nodes to be good. */
1172 cpp_opts->precision = TYPE_PRECISION (intmax_type_node);
1173 cpp_opts->char_precision = TYPE_PRECISION (char_type_node);
1174 cpp_opts->int_precision = TYPE_PRECISION (integer_type_node);
1175 cpp_opts->wchar_precision = TYPE_PRECISION (wchar_type_node);
1176 cpp_opts->unsigned_wchar = TYPE_UNSIGNED (wchar_type_node);
1177 cpp_opts->bytes_big_endian = BYTES_BIG_ENDIAN;
1179 /* This can't happen until after wchar_precision and bytes_big_endian
1181 cpp_init_iconv (parse_in);
1184 c_common_print_pch_checksum (stderr);
1186 if (flag_preprocess_only)
1189 preprocess_file (parse_in);
1193 /* Has to wait until now so that cpplib has its hash table. */
1199 /* Initialize the integrated preprocessor after debug output has been
1200 initialized; loop over each input file. */
1202 c_common_parse_file (int set_yydebug)
1206 /* Enable parser debugging, if requested and we can. If requested
1207 and we can't, notify the user. */
1209 yydebug = set_yydebug;
1212 warning (0, "YYDEBUG was not defined at build time, -dy ignored");
1218 /* Start the main input file, if the debug writer wants it. */
1219 if (debug_hooks->start_end_main_source_file)
1220 (*debug_hooks->start_source_file) (0, this_input_filename);
1227 /* And end the main input file, if the debug writer wants it */
1228 if (debug_hooks->start_end_main_source_file)
1229 (*debug_hooks->end_source_file) (0);
1230 if (++i >= num_in_fnames)
1232 cpp_undef_all (parse_in);
1234 = cpp_read_main_file (parse_in, in_fnames[i]);
1235 /* If an input file is missing, abandon further compilation.
1236 cpplib has issued a diagnostic. */
1237 if (!this_input_filename)
1242 /* Common finish hook for the C, ObjC and C++ front ends. */
1244 c_common_finish (void)
1246 FILE *deps_stream = NULL;
1248 if (cpp_opts->deps.style != DEPS_NONE)
1250 /* If -M or -MM was seen without -MF, default output to the
1253 deps_stream = out_stream;
1256 deps_stream = fopen (deps_file, deps_append ? "a": "w");
1258 fatal_error ("opening dependency file %s: %m", deps_file);
1262 /* For performance, avoid tearing down cpplib's internal structures
1263 with cpp_destroy (). */
1264 errorcount += cpp_finish (parse_in, deps_stream);
1266 if (deps_stream && deps_stream != out_stream
1267 && (ferror (deps_stream) || fclose (deps_stream)))
1268 fatal_error ("closing dependency file %s: %m", deps_file);
1270 if (out_stream && (ferror (out_stream) || fclose (out_stream)))
1271 fatal_error ("when writing output to %s: %m", out_fname);
1274 /* Either of two environment variables can specify output of
1275 dependencies. Their value is either "OUTPUT_FILE" or "OUTPUT_FILE
1276 DEPS_TARGET", where OUTPUT_FILE is the file to write deps info to
1277 and DEPS_TARGET is the target to mention in the deps. They also
1278 result in dependency information being appended to the output file
1279 rather than overwriting it, and like Sun's compiler
1280 SUNPRO_DEPENDENCIES suppresses the dependency on the main file. */
1282 check_deps_environment_vars (void)
1286 GET_ENVIRONMENT (spec, "DEPENDENCIES_OUTPUT");
1288 cpp_opts->deps.style = DEPS_USER;
1291 GET_ENVIRONMENT (spec, "SUNPRO_DEPENDENCIES");
1294 cpp_opts->deps.style = DEPS_SYSTEM;
1295 cpp_opts->deps.ignore_main_file = true;
1301 /* Find the space before the DEPS_TARGET, if there is one. */
1302 char *s = strchr (spec, ' ');
1305 /* Let the caller perform MAKE quoting. */
1306 defer_opt (OPT_MT, s + 1);
1310 /* Command line -MF overrides environment variables and default. */
1319 /* Handle deferred command line switches. */
1321 handle_deferred_opts (void)
1326 /* Avoid allocating the deps buffer if we don't need it.
1327 (This flag may be true without there having been -MT or -MQ
1328 options, but we'll still need the deps buffer.) */
1332 deps = cpp_get_deps (parse_in);
1334 for (i = 0; i < deferred_count; i++)
1336 struct deferred_opt *opt = &deferred_opts[i];
1338 if (opt->code == OPT_MT || opt->code == OPT_MQ)
1339 deps_add_target (deps, opt->arg, opt->code == OPT_MQ);
1343 /* These settings are appropriate for GCC, but not necessarily so for
1344 cpplib as a library. */
1346 sanitize_cpp_opts (void)
1348 /* If we don't know what style of dependencies to output, complain
1349 if any other dependency switches have been given. */
1350 if (deps_seen && cpp_opts->deps.style == DEPS_NONE)
1351 error ("to generate dependencies you must specify either -M or -MM");
1353 /* -dM and dependencies suppress normal output; do it here so that
1354 the last -d[MDN] switch overrides earlier ones. */
1355 if (flag_dump_macros == 'M')
1358 /* By default, -fdirectives-only implies -dD. This allows subsequent phases
1359 to perform proper macro expansion. */
1360 if (cpp_opts->directives_only && !cpp_opts->preprocessed && !flag_dump_macros)
1361 flag_dump_macros = 'D';
1363 /* Disable -dD, -dN and -dI if normal output is suppressed. Allow
1364 -dM since at least glibc relies on -M -dM to work. */
1365 /* Also, flag_no_output implies flag_no_line_commands, always. */
1368 if (flag_dump_macros != 'M')
1369 flag_dump_macros = 0;
1370 flag_dump_includes = 0;
1371 flag_no_line_commands = 1;
1374 cpp_opts->unsigned_char = !flag_signed_char;
1375 cpp_opts->stdc_0_in_system_headers = STDC_0_IN_SYSTEM_HEADERS;
1377 /* We want -Wno-long-long to override -pedantic -std=non-c99
1378 and/or -Wtraditional, whatever the ordering. */
1379 cpp_opts->warn_long_long
1380 = warn_long_long && ((!flag_isoc99 && pedantic) || warn_traditional);
1382 /* Similarly with -Wno-variadic-macros. No check for c99 here, since
1383 this also turns off warnings about GCCs extension. */
1384 cpp_opts->warn_variadic_macros
1385 = warn_variadic_macros && (pedantic || warn_traditional);
1387 /* If we're generating preprocessor output, emit current directory
1388 if explicitly requested or if debugging information is enabled.
1389 ??? Maybe we should only do it for debugging formats that
1390 actually output the current directory? */
1391 if (flag_working_directory == -1)
1392 flag_working_directory = (debug_info_level != DINFO_LEVEL_NONE);
1394 if (cpp_opts->directives_only)
1396 if (warn_unused_macros)
1397 error ("-fdirectives-only is incompatible with -Wunused_macros");
1398 if (cpp_opts->traditional)
1399 error ("-fdirectives-only is incompatible with -traditional");
1403 /* Add include path with a prefix at the front of its name. */
1405 add_prefixed_path (const char *suffix, size_t chain)
1409 size_t prefix_len, suffix_len;
1411 suffix_len = strlen (suffix);
1412 prefix = iprefix ? iprefix : cpp_GCC_INCLUDE_DIR;
1413 prefix_len = iprefix ? strlen (iprefix) : cpp_GCC_INCLUDE_DIR_len;
1415 path = (char *) xmalloc (prefix_len + suffix_len + 1);
1416 memcpy (path, prefix, prefix_len);
1417 memcpy (path + prefix_len, suffix, suffix_len);
1418 path[prefix_len + suffix_len] = '\0';
1420 add_path (path, chain, 0, false);
1423 /* Handle -D, -U, -A, -imacros, and the first -include. */
1425 finish_options (void)
1427 if (!cpp_opts->preprocessed)
1431 cb_file_change (parse_in,
1432 linemap_add (&line_table, LC_RENAME, 0,
1433 _("<built-in>"), 0));
1435 cpp_init_builtins (parse_in, flag_hosted);
1436 c_cpp_builtins (parse_in);
1438 /* We're about to send user input to cpplib, so make it warn for
1439 things that we previously (when we sent it internal definitions)
1440 told it to not warn.
1442 C99 permits implementation-defined characters in identifiers.
1443 The documented meaning of -std= is to turn off extensions that
1444 conflict with the specified standard, and since a strictly
1445 conforming program cannot contain a '$', we do not condition
1446 their acceptance on the -std= setting. */
1447 cpp_opts->warn_dollars = (cpp_opts->pedantic && !cpp_opts->c99);
1449 cb_file_change (parse_in,
1450 linemap_add (&line_table, LC_RENAME, 0,
1451 _("<command-line>"), 0));
1453 for (i = 0; i < deferred_count; i++)
1455 struct deferred_opt *opt = &deferred_opts[i];
1457 if (opt->code == OPT_D)
1458 cpp_define (parse_in, opt->arg);
1459 else if (opt->code == OPT_U)
1460 cpp_undef (parse_in, opt->arg);
1461 else if (opt->code == OPT_A)
1463 if (opt->arg[0] == '-')
1464 cpp_unassert (parse_in, opt->arg + 1);
1466 cpp_assert (parse_in, opt->arg);
1470 /* Handle -imacros after -D and -U. */
1471 for (i = 0; i < deferred_count; i++)
1473 struct deferred_opt *opt = &deferred_opts[i];
1475 if (opt->code == OPT_imacros
1476 && cpp_push_include (parse_in, opt->arg))
1478 /* Disable push_command_line_include callback for now. */
1479 include_cursor = deferred_count + 1;
1480 cpp_scan_nooutput (parse_in);
1484 else if (cpp_opts->directives_only)
1485 cpp_init_special_builtins (parse_in);
1488 push_command_line_include ();
1491 /* Give CPP the next file given by -include, if any. */
1493 push_command_line_include (void)
1495 while (include_cursor < deferred_count)
1497 struct deferred_opt *opt = &deferred_opts[include_cursor++];
1499 if (!cpp_opts->preprocessed && opt->code == OPT_include
1500 && cpp_push_include (parse_in, opt->arg))
1504 if (include_cursor == deferred_count)
1507 /* -Wunused-macros should only warn about macros defined hereafter. */
1508 cpp_opts->warn_unused_macros = warn_unused_macros;
1509 /* Restore the line map from <command line>. */
1510 if (!cpp_opts->preprocessed)
1511 cpp_change_file (parse_in, LC_RENAME, this_input_filename);
1513 /* Set this here so the client can change the option if it wishes,
1514 and after stacking the main file so we don't trace the main file. */
1515 line_table.trace_includes = cpp_opts->print_include_names;
1519 /* File change callback. Has to handle -include files. */
1521 cb_file_change (cpp_reader * ARG_UNUSED (pfile),
1522 const struct line_map *new_map)
1524 if (flag_preprocess_only)
1525 pp_file_change (new_map);
1527 fe_file_change (new_map);
1529 if (new_map == 0 || (new_map->reason == LC_LEAVE && MAIN_FILE_P (new_map)))
1530 push_command_line_include ();
1534 cb_dir_change (cpp_reader * ARG_UNUSED (pfile), const char *dir)
1536 if (!set_src_pwd (dir))
1537 warning (0, "too late for # directive to set debug directory");
1540 /* Set the C 89 standard (with 1994 amendments if C94, without GNU
1541 extensions if ISO). There is no concept of gnu94. */
1543 set_std_c89 (int c94, int iso)
1545 cpp_set_lang (parse_in, c94 ? CLK_STDC94: iso ? CLK_STDC89: CLK_GNUC89);
1548 flag_no_gnu_keywords = iso;
1549 flag_no_nonansi_builtin = iso;
1554 /* Set the C 99 standard (without GNU extensions if ISO). */
1556 set_std_c99 (int iso)
1558 cpp_set_lang (parse_in, iso ? CLK_STDC99: CLK_GNUC99);
1560 flag_no_nonansi_builtin = iso;
1566 /* Set the C++ 98 standard (without GNU extensions if ISO). */
1568 set_std_cxx98 (int iso)
1570 cpp_set_lang (parse_in, iso ? CLK_CXX98: CLK_GNUCXX);
1571 flag_no_gnu_keywords = iso;
1572 flag_no_nonansi_builtin = iso;
1576 /* Handle setting implicit to ON. */
1578 set_Wimplicit (int on)
1581 warn_implicit_int = on;
1584 if (mesg_implicit_function_declaration != 2)
1585 mesg_implicit_function_declaration = 1;
1588 mesg_implicit_function_declaration = 0;
1591 /* Args to -d specify what to dump. Silently ignore
1592 unrecognized options; they may be aimed at toplev.c. */
1594 handle_OPT_d (const char *arg)
1598 while ((c = *arg++) != '\0')
1601 case 'M': /* Dump macros only. */
1602 case 'N': /* Dump names. */
1603 case 'D': /* Dump definitions. */
1604 flag_dump_macros = c;
1608 flag_dump_includes = 1;