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);
390 set_Wimplicit (value);
391 warn_char_subscripts = value;
392 warn_missing_braces = value;
393 warn_parentheses = value;
394 warn_return_type = value;
395 warn_sequence_point = value; /* Was C only. */
396 if (c_dialect_cxx ())
397 warn_sign_compare = value;
399 warn_strict_aliasing = value;
400 warn_strict_overflow = value;
401 warn_address = value;
403 /* Only warn about unknown pragmas that are not in system
405 warn_unknown_pragmas = value;
407 /* We save the value of warn_uninitialized, since if they put
408 -Wuninitialized on the command line, we need to generate a
409 warning about not using it without also specifying -O. */
410 if (warn_uninitialized != 1)
411 warn_uninitialized = (value ? 2 : 0);
413 if (!c_dialect_cxx ())
414 /* We set this to 2 here, but 1 in -Wmain, so -ffreestanding
415 can turn it off only if it's not explicit. */
416 warn_main = value * 2;
419 /* C++-specific warnings. */
420 warn_reorder = value;
421 warn_nontemplate_friend = value;
424 cpp_opts->warn_trigraphs = value;
425 cpp_opts->warn_comments = value;
426 cpp_opts->warn_num_sign_change = value;
427 cpp_opts->warn_multichar = value; /* Was C++ only. */
429 if (warn_pointer_sign == -1)
430 warn_pointer_sign = 1;
435 cpp_opts->warn_comments = value;
438 case OPT_Wdeprecated:
439 cpp_opts->warn_deprecated = value;
442 case OPT_Wendif_labels:
443 cpp_opts->warn_endif_labels = value;
447 cpp_opts->warnings_are_errors = value;
448 global_dc->warning_as_error_requested = value;
451 case OPT_Werror_implicit_function_declaration:
452 mesg_implicit_function_declaration = 2;
460 set_Wformat (atoi (arg));
464 set_Wimplicit (value);
468 /* Silently ignore for now. */
471 case OPT_Winvalid_pch:
472 cpp_opts->warn_invalid_pch = value;
482 case OPT_Wmissing_include_dirs:
483 cpp_opts->warn_missing_include_dirs = value;
487 cpp_opts->warn_multichar = value;
490 case OPT_Wnormalized_:
491 if (!value || (arg && strcasecmp (arg, "none") == 0))
492 cpp_opts->warn_normalize = normalized_none;
493 else if (!arg || strcasecmp (arg, "nfkc") == 0)
494 cpp_opts->warn_normalize = normalized_KC;
495 else if (strcasecmp (arg, "id") == 0)
496 cpp_opts->warn_normalize = normalized_identifier_C;
497 else if (strcasecmp (arg, "nfc") == 0)
498 cpp_opts->warn_normalize = normalized_C;
500 error ("argument %qs to %<-Wnormalized%> not recognized", arg);
503 case OPT_Wreturn_type:
504 warn_return_type = value;
507 case OPT_Wstrict_null_sentinel:
508 warn_strict_null_sentinel = value;
511 case OPT_Wsystem_headers:
512 cpp_opts->warn_system_headers = value;
515 case OPT_Wtraditional:
516 cpp_opts->warn_traditional = value;
520 cpp_opts->warn_trigraphs = value;
524 cpp_opts->warn_undef = value;
527 case OPT_Wunknown_pragmas:
528 /* Set to greater than 1, so that even unknown pragmas in
529 system headers will be warned about. */
530 warn_unknown_pragmas = value * 2;
533 case OPT_Wunused_macros:
534 warn_unused_macros = value;
537 case OPT_Wvariadic_macros:
538 warn_variadic_macros = value;
541 case OPT_Wwrite_strings:
542 warn_write_strings = value;
548 warn_nonvdtor = true;
552 if (!c_dialect_cxx ())
553 set_std_c89 (false, true);
555 set_std_cxx98 (true);
562 case OPT_fcond_mismatch:
563 if (!c_dialect_cxx ())
565 flag_cond_mismatch = value;
570 case OPT_fall_virtual:
571 case OPT_falt_external_templates:
572 case OPT_fenum_int_equiv:
573 case OPT_fexternal_templates:
574 case OPT_fguiding_decls:
576 case OPT_fhuge_objects:
578 case OPT_fname_mangling_version_:
580 case OPT_fnonnull_objects:
582 case OPT_fstrict_prototype:
583 case OPT_fthis_is_variable:
584 case OPT_fvtable_thunks:
587 warning (0, "switch %qs is no longer supported", option->opt_text);
590 case OPT_faccess_control:
591 flag_access_control = value;
595 flag_no_asm = !value;
599 flag_no_builtin = !value;
606 disable_builtin_function (arg);
609 case OPT_fdollars_in_identifiers:
610 cpp_opts->dollars_in_ident = value;
613 case OPT_ffreestanding:
615 /* Fall through.... */
618 flag_no_builtin = !value;
619 /* warn_main will be 2 if set by -Wall, 1 if set by -Wmain */
620 if (!value && warn_main == 2)
624 case OPT_fshort_double:
625 flag_short_double = value;
628 case OPT_fshort_enums:
629 flag_short_enums = value;
632 case OPT_fshort_wchar:
633 flag_short_wchar = value;
636 case OPT_fsigned_bitfields:
637 flag_signed_bitfields = value;
640 case OPT_fsigned_char:
641 flag_signed_char = value;
644 case OPT_funsigned_bitfields:
645 flag_signed_bitfields = !value;
648 case OPT_funsigned_char:
649 flag_signed_char = !value;
653 flag_check_new = value;
656 case OPT_fconserve_space:
657 flag_conserve_space = value;
660 case OPT_fconstant_string_class_:
661 constant_string_class_name = arg;
664 case OPT_fdefault_inline:
665 flag_default_inline = value;
668 case OPT_felide_constructors:
669 flag_elide_constructors = value;
672 case OPT_fenforce_eh_specs:
673 flag_enforce_eh_specs = value;
676 case OPT_fextended_identifiers:
677 cpp_opts->extended_identifiers = value;
681 flag_new_for_scope = value;
684 case OPT_fgnu_keywords:
685 flag_no_gnu_keywords = !value;
688 case OPT_fgnu_runtime:
689 flag_next_runtime = !value;
692 case OPT_fhandle_exceptions:
693 warning (0, "-fhandle-exceptions has been renamed -fexceptions (and is now on by default)");
694 flag_exceptions = value;
697 case OPT_fimplement_inlines:
698 flag_implement_inlines = value;
701 case OPT_fimplicit_inline_templates:
702 flag_implicit_inline_templates = value;
705 case OPT_fimplicit_templates:
706 flag_implicit_templates = value;
709 case OPT_fms_extensions:
710 flag_ms_extensions = value;
713 case OPT_fnext_runtime:
714 flag_next_runtime = value;
717 case OPT_fnil_receivers:
718 flag_nil_receivers = value;
721 case OPT_fnonansi_builtins:
722 flag_no_nonansi_builtin = !value;
725 case OPT_foperator_names:
726 cpp_opts->operator_names = value;
729 case OPT_foptional_diags:
730 flag_optional_diags = value;
734 cpp_opts->restore_pch_deps = value;
737 case OPT_fpch_preprocess:
738 flag_pch_preprocess = value;
741 case OPT_fpermissive:
742 flag_permissive = value;
745 case OPT_fpreprocessed:
746 cpp_opts->preprocessed = value;
749 case OPT_freplace_objc_classes:
750 flag_replace_objc_classes = value;
754 flag_use_repository = value;
756 flag_implicit_templates = 0;
763 case OPT_fshow_column:
764 cpp_opts->show_column = value;
768 flag_detailed_statistics = value;
772 /* It is documented that we silently ignore silly values. */
773 if (value >= 1 && value <= 100)
774 cpp_opts->tabstop = value;
777 case OPT_fexec_charset_:
778 cpp_opts->narrow_charset = arg;
781 case OPT_fwide_exec_charset_:
782 cpp_opts->wide_charset = arg;
785 case OPT_finput_charset_:
786 cpp_opts->input_charset = arg;
789 case OPT_ftemplate_depth_:
790 max_tinst_depth = value;
793 case OPT_fuse_cxa_atexit:
794 flag_use_cxa_atexit = value;
797 case OPT_fuse_cxa_get_exception_ptr:
798 flag_use_cxa_get_exception_ptr = value;
801 case OPT_fvisibility_inlines_hidden:
802 visibility_options.inlines_hidden = value;
809 case OPT_fthreadsafe_statics:
810 flag_threadsafe_statics = value;
814 flag_zero_link = value;
818 flag_gen_declaration = 1;
821 case OPT_femit_struct_debug_baseonly:
822 set_struct_debug_option ("base");
825 case OPT_femit_struct_debug_reduced:
826 set_struct_debug_option ("dir:ord:sys,dir:gen:any,ind:base");
829 case OPT_femit_struct_debug_detailed_:
830 set_struct_debug_option (arg);
834 add_path (xstrdup (arg), AFTER, 0, true);
839 defer_opt (code, arg);
851 add_path (xstrdup (arg), QUOTE, 0, true);
859 add_path (xstrdup (arg), SYSTEM, 0, true);
862 case OPT_iwithprefix:
863 add_prefixed_path (arg, SYSTEM);
866 case OPT_iwithprefixbefore:
867 add_prefixed_path (arg, BRACKET);
871 cpp_set_lang (parse_in, CLK_ASM);
872 cpp_opts->dollars_in_ident = false;
875 case OPT_lang_fortran:
895 error ("output filename specified twice");
898 /* We need to handle the -pedantic switches here, rather than in
899 c_common_post_options, so that a subsequent -Wno-endif-labels
900 is not overridden. */
901 case OPT_pedantic_errors:
902 cpp_opts->pedantic_errors = 1;
905 cpp_opts->pedantic = 1;
906 cpp_opts->warn_endif_labels = 1;
907 if (warn_pointer_sign == -1)
908 warn_pointer_sign = 1;
909 if (warn_overlength_strings == -1)
910 warn_overlength_strings = 1;
913 case OPT_print_objc_runtime_info:
914 print_struct_values = 1;
917 case OPT_print_pch_checksum:
918 c_common_print_pch_checksum (stdout);
919 exit_after_options = true;
927 case OPT_std_gnu__98:
928 if (!preprocessing_asm_p)
929 set_std_cxx98 (code == OPT_std_c__98 /* ISO */);
933 case OPT_std_iso9899_1990:
934 case OPT_std_iso9899_199409:
935 if (!preprocessing_asm_p)
936 set_std_c89 (code == OPT_std_iso9899_199409 /* c94 */, true /* ISO */);
940 if (!preprocessing_asm_p)
941 set_std_c89 (false /* c94 */, false /* ISO */);
946 case OPT_std_iso9899_1999:
947 case OPT_std_iso9899_199x:
948 if (!preprocessing_asm_p)
949 set_std_c99 (true /* ISO */);
954 if (!preprocessing_asm_p)
955 set_std_c99 (false /* ISO */);
959 cpp_opts->trigraphs = 1;
962 case OPT_traditional_cpp:
963 cpp_opts->traditional = 1;
971 cpp_opts->inhibit_warnings = 1;
982 /* Post-switch processing. */
984 c_common_post_options (const char **pfilename)
986 struct cpp_callbacks *cb;
988 /* Canonicalize the input and output filenames. */
989 if (in_fnames == NULL)
991 in_fnames = XNEWVEC (const char *, 1);
994 else if (strcmp (in_fnames[0], "-") == 0)
997 if (out_fname == NULL || !strcmp (out_fname, "-"))
1000 if (cpp_opts->deps.style == DEPS_NONE)
1001 check_deps_environment_vars ();
1003 handle_deferred_opts ();
1005 sanitize_cpp_opts ();
1007 register_include_chains (parse_in, sysroot, iprefix, imultilib,
1008 std_inc, std_cxx_inc && c_dialect_cxx (), verbose);
1010 #ifdef C_COMMON_OVERRIDE_OPTIONS
1011 /* Some machines may reject certain combinations of C
1012 language-specific options. */
1013 C_COMMON_OVERRIDE_OPTIONS;
1016 flag_inline_trees = 1;
1018 /* Use tree inlining. */
1019 if (!flag_no_inline)
1021 if (flag_inline_functions)
1022 flag_inline_trees = 2;
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");
1031 /* If we are given more than one input file, we must use
1032 unit-at-a-time mode. */
1033 if (num_in_fnames > 1)
1034 flag_unit_at_a_time = 1;
1036 /* Default to ObjC sjlj exception handling if NeXT runtime. */
1037 if (flag_objc_sjlj_exceptions < 0)
1038 flag_objc_sjlj_exceptions = flag_next_runtime;
1039 if (flag_objc_exceptions && !flag_objc_sjlj_exceptions)
1040 flag_exceptions = 1;
1042 /* -Wextra implies -Wsign-compare, -Wmissing-field-initializers and
1043 -Woverride-init, but not if explicitly overridden. */
1044 if (warn_sign_compare == -1)
1045 warn_sign_compare = extra_warnings;
1046 if (warn_missing_field_initializers == -1)
1047 warn_missing_field_initializers = extra_warnings;
1048 if (warn_override_init == -1)
1049 warn_override_init = extra_warnings;
1051 /* -Wpointer_sign is disabled by default, but it is enabled if any
1052 of -Wall or -pedantic are given. */
1053 if (warn_pointer_sign == -1)
1054 warn_pointer_sign = 0;
1056 /* -Woverlength-strings is off by default, but is enabled by -pedantic.
1057 It is never enabled in C++, as the minimum limit is not normative
1058 in that standard. */
1059 if (warn_overlength_strings == -1 || c_dialect_cxx ())
1060 warn_overlength_strings = 0;
1062 /* Special format checking options don't work without -Wformat; warn if
1066 warning (OPT_Wformat_y2k,
1067 "-Wformat-y2k ignored without -Wformat");
1068 warning (OPT_Wformat_extra_args,
1069 "-Wformat-extra-args ignored without -Wformat");
1070 warning (OPT_Wformat_zero_length,
1071 "-Wformat-zero-length ignored without -Wformat");
1072 warning (OPT_Wformat_nonliteral,
1073 "-Wformat-nonliteral ignored without -Wformat");
1074 warning (OPT_Wformat_security,
1075 "-Wformat-security ignored without -Wformat");
1078 /* C99 requires special handling of complex multiplication and division;
1079 -ffast-math and -fcx-limited-range are handled in process_options. */
1081 flag_complex_method = 2;
1083 if (flag_preprocess_only)
1085 /* Open the output now. We must do so even if flag_no_output is
1086 on, because there may be other output than from the actual
1087 preprocessing (e.g. from -dM). */
1088 if (out_fname[0] == '\0')
1089 out_stream = stdout;
1091 out_stream = fopen (out_fname, "w");
1093 if (out_stream == NULL)
1095 fatal_error ("opening output file %s: %m", out_fname);
1099 if (num_in_fnames > 1)
1100 error ("too many filenames given. Type %s --help for usage",
1103 init_pp_output (out_stream);
1109 /* Yuk. WTF is this? I do know ObjC relies on it somewhere. */
1110 input_location = UNKNOWN_LOCATION;
1113 cb = cpp_get_callbacks (parse_in);
1114 cb->file_change = cb_file_change;
1115 cb->dir_change = cb_dir_change;
1116 cpp_post_options (parse_in);
1118 input_location = UNKNOWN_LOCATION;
1120 /* If an error has occurred in cpplib, note it so we fail
1122 errorcount += cpp_errors (parse_in);
1124 *pfilename = this_input_filename
1125 = cpp_read_main_file (parse_in, in_fnames[0]);
1126 /* Don't do any compilation or preprocessing if there is no input file. */
1127 if (this_input_filename == NULL)
1133 if (flag_working_directory
1134 && flag_preprocess_only && !flag_no_line_commands)
1135 pp_dir_change (parse_in, get_src_pwd ());
1137 return flag_preprocess_only;
1140 /* Front end initialization common to C, ObjC and C++. */
1142 c_common_init (void)
1144 /* Set up preprocessor arithmetic. Must be done after call to
1145 c_common_nodes_and_builtins for type nodes to be good. */
1146 cpp_opts->precision = TYPE_PRECISION (intmax_type_node);
1147 cpp_opts->char_precision = TYPE_PRECISION (char_type_node);
1148 cpp_opts->int_precision = TYPE_PRECISION (integer_type_node);
1149 cpp_opts->wchar_precision = TYPE_PRECISION (wchar_type_node);
1150 cpp_opts->unsigned_wchar = TYPE_UNSIGNED (wchar_type_node);
1151 cpp_opts->bytes_big_endian = BYTES_BIG_ENDIAN;
1153 /* This can't happen until after wchar_precision and bytes_big_endian
1155 cpp_init_iconv (parse_in);
1158 c_common_print_pch_checksum (stderr);
1160 if (flag_preprocess_only)
1163 preprocess_file (parse_in);
1167 /* Has to wait until now so that cpplib has its hash table. */
1173 /* Initialize the integrated preprocessor after debug output has been
1174 initialized; loop over each input file. */
1176 c_common_parse_file (int set_yydebug)
1180 /* Enable parser debugging, if requested and we can. If requested
1181 and we can't, notify the user. */
1183 yydebug = set_yydebug;
1186 warning (0, "YYDEBUG was not defined at build time, -dy ignored");
1192 /* Start the main input file, if the debug writer wants it. */
1193 if (debug_hooks->start_end_main_source_file)
1194 (*debug_hooks->start_source_file) (0, this_input_filename);
1201 /* And end the main input file, if the debug writer wants it */
1202 if (debug_hooks->start_end_main_source_file)
1203 (*debug_hooks->end_source_file) (0);
1204 if (++i >= num_in_fnames)
1206 cpp_undef_all (parse_in);
1208 = cpp_read_main_file (parse_in, in_fnames[i]);
1209 /* If an input file is missing, abandon further compilation.
1210 cpplib has issued a diagnostic. */
1211 if (!this_input_filename)
1216 /* Common finish hook for the C, ObjC and C++ front ends. */
1218 c_common_finish (void)
1220 FILE *deps_stream = NULL;
1222 if (cpp_opts->deps.style != DEPS_NONE)
1224 /* If -M or -MM was seen without -MF, default output to the
1227 deps_stream = out_stream;
1230 deps_stream = fopen (deps_file, deps_append ? "a": "w");
1232 fatal_error ("opening dependency file %s: %m", deps_file);
1236 /* For performance, avoid tearing down cpplib's internal structures
1237 with cpp_destroy (). */
1238 errorcount += cpp_finish (parse_in, deps_stream);
1240 if (deps_stream && deps_stream != out_stream
1241 && (ferror (deps_stream) || fclose (deps_stream)))
1242 fatal_error ("closing dependency file %s: %m", deps_file);
1244 if (out_stream && (ferror (out_stream) || fclose (out_stream)))
1245 fatal_error ("when writing output to %s: %m", out_fname);
1248 /* Either of two environment variables can specify output of
1249 dependencies. Their value is either "OUTPUT_FILE" or "OUTPUT_FILE
1250 DEPS_TARGET", where OUTPUT_FILE is the file to write deps info to
1251 and DEPS_TARGET is the target to mention in the deps. They also
1252 result in dependency information being appended to the output file
1253 rather than overwriting it, and like Sun's compiler
1254 SUNPRO_DEPENDENCIES suppresses the dependency on the main file. */
1256 check_deps_environment_vars (void)
1260 GET_ENVIRONMENT (spec, "DEPENDENCIES_OUTPUT");
1262 cpp_opts->deps.style = DEPS_USER;
1265 GET_ENVIRONMENT (spec, "SUNPRO_DEPENDENCIES");
1268 cpp_opts->deps.style = DEPS_SYSTEM;
1269 cpp_opts->deps.ignore_main_file = true;
1275 /* Find the space before the DEPS_TARGET, if there is one. */
1276 char *s = strchr (spec, ' ');
1279 /* Let the caller perform MAKE quoting. */
1280 defer_opt (OPT_MT, s + 1);
1284 /* Command line -MF overrides environment variables and default. */
1293 /* Handle deferred command line switches. */
1295 handle_deferred_opts (void)
1300 /* Avoid allocating the deps buffer if we don't need it.
1301 (This flag may be true without there having been -MT or -MQ
1302 options, but we'll still need the deps buffer.) */
1306 deps = cpp_get_deps (parse_in);
1308 for (i = 0; i < deferred_count; i++)
1310 struct deferred_opt *opt = &deferred_opts[i];
1312 if (opt->code == OPT_MT || opt->code == OPT_MQ)
1313 deps_add_target (deps, opt->arg, opt->code == OPT_MQ);
1317 /* These settings are appropriate for GCC, but not necessarily so for
1318 cpplib as a library. */
1320 sanitize_cpp_opts (void)
1322 /* If we don't know what style of dependencies to output, complain
1323 if any other dependency switches have been given. */
1324 if (deps_seen && cpp_opts->deps.style == DEPS_NONE)
1325 error ("to generate dependencies you must specify either -M or -MM");
1327 /* -dM and dependencies suppress normal output; do it here so that
1328 the last -d[MDN] switch overrides earlier ones. */
1329 if (flag_dump_macros == 'M')
1332 /* Disable -dD, -dN and -dI if normal output is suppressed. Allow
1333 -dM since at least glibc relies on -M -dM to work. */
1334 /* Also, flag_no_output implies flag_no_line_commands, always. */
1337 if (flag_dump_macros != 'M')
1338 flag_dump_macros = 0;
1339 flag_dump_includes = 0;
1340 flag_no_line_commands = 1;
1343 cpp_opts->unsigned_char = !flag_signed_char;
1344 cpp_opts->stdc_0_in_system_headers = STDC_0_IN_SYSTEM_HEADERS;
1346 /* We want -Wno-long-long to override -pedantic -std=non-c99
1347 and/or -Wtraditional, whatever the ordering. */
1348 cpp_opts->warn_long_long
1349 = warn_long_long && ((!flag_isoc99 && pedantic) || warn_traditional);
1351 /* Similarly with -Wno-variadic-macros. No check for c99 here, since
1352 this also turns off warnings about GCCs extension. */
1353 cpp_opts->warn_variadic_macros
1354 = warn_variadic_macros && (pedantic || warn_traditional);
1356 /* If we're generating preprocessor output, emit current directory
1357 if explicitly requested or if debugging information is enabled.
1358 ??? Maybe we should only do it for debugging formats that
1359 actually output the current directory? */
1360 if (flag_working_directory == -1)
1361 flag_working_directory = (debug_info_level != DINFO_LEVEL_NONE);
1364 /* Add include path with a prefix at the front of its name. */
1366 add_prefixed_path (const char *suffix, size_t chain)
1370 size_t prefix_len, suffix_len;
1372 suffix_len = strlen (suffix);
1373 prefix = iprefix ? iprefix : cpp_GCC_INCLUDE_DIR;
1374 prefix_len = iprefix ? strlen (iprefix) : cpp_GCC_INCLUDE_DIR_len;
1376 path = (char *) xmalloc (prefix_len + suffix_len + 1);
1377 memcpy (path, prefix, prefix_len);
1378 memcpy (path + prefix_len, suffix, suffix_len);
1379 path[prefix_len + suffix_len] = '\0';
1381 add_path (path, chain, 0, false);
1384 /* Handle -D, -U, -A, -imacros, and the first -include. */
1386 finish_options (void)
1388 if (!cpp_opts->preprocessed)
1392 cb_file_change (parse_in,
1393 linemap_add (&line_table, LC_RENAME, 0,
1394 _("<built-in>"), 0));
1396 cpp_init_builtins (parse_in, flag_hosted);
1397 c_cpp_builtins (parse_in);
1399 /* We're about to send user input to cpplib, so make it warn for
1400 things that we previously (when we sent it internal definitions)
1401 told it to not warn.
1403 C99 permits implementation-defined characters in identifiers.
1404 The documented meaning of -std= is to turn off extensions that
1405 conflict with the specified standard, and since a strictly
1406 conforming program cannot contain a '$', we do not condition
1407 their acceptance on the -std= setting. */
1408 cpp_opts->warn_dollars = (cpp_opts->pedantic && !cpp_opts->c99);
1410 cb_file_change (parse_in,
1411 linemap_add (&line_table, LC_RENAME, 0,
1412 _("<command-line>"), 0));
1414 for (i = 0; i < deferred_count; i++)
1416 struct deferred_opt *opt = &deferred_opts[i];
1418 if (opt->code == OPT_D)
1419 cpp_define (parse_in, opt->arg);
1420 else if (opt->code == OPT_U)
1421 cpp_undef (parse_in, opt->arg);
1422 else if (opt->code == OPT_A)
1424 if (opt->arg[0] == '-')
1425 cpp_unassert (parse_in, opt->arg + 1);
1427 cpp_assert (parse_in, opt->arg);
1431 /* Handle -imacros after -D and -U. */
1432 for (i = 0; i < deferred_count; i++)
1434 struct deferred_opt *opt = &deferred_opts[i];
1436 if (opt->code == OPT_imacros
1437 && cpp_push_include (parse_in, opt->arg))
1439 /* Disable push_command_line_include callback for now. */
1440 include_cursor = deferred_count + 1;
1441 cpp_scan_nooutput (parse_in);
1447 push_command_line_include ();
1450 /* Give CPP the next file given by -include, if any. */
1452 push_command_line_include (void)
1454 while (include_cursor < deferred_count)
1456 struct deferred_opt *opt = &deferred_opts[include_cursor++];
1458 if (!cpp_opts->preprocessed && opt->code == OPT_include
1459 && cpp_push_include (parse_in, opt->arg))
1463 if (include_cursor == deferred_count)
1466 /* -Wunused-macros should only warn about macros defined hereafter. */
1467 cpp_opts->warn_unused_macros = warn_unused_macros;
1468 /* Restore the line map from <command line>. */
1469 if (!cpp_opts->preprocessed)
1470 cpp_change_file (parse_in, LC_RENAME, this_input_filename);
1472 /* Set this here so the client can change the option if it wishes,
1473 and after stacking the main file so we don't trace the main file. */
1474 line_table.trace_includes = cpp_opts->print_include_names;
1478 /* File change callback. Has to handle -include files. */
1480 cb_file_change (cpp_reader * ARG_UNUSED (pfile),
1481 const struct line_map *new_map)
1483 if (flag_preprocess_only)
1484 pp_file_change (new_map);
1486 fe_file_change (new_map);
1488 if (new_map == 0 || (new_map->reason == LC_LEAVE && MAIN_FILE_P (new_map)))
1489 push_command_line_include ();
1493 cb_dir_change (cpp_reader * ARG_UNUSED (pfile), const char *dir)
1495 if (!set_src_pwd (dir))
1496 warning (0, "too late for # directive to set debug directory");
1499 /* Set the C 89 standard (with 1994 amendments if C94, without GNU
1500 extensions if ISO). There is no concept of gnu94. */
1502 set_std_c89 (int c94, int iso)
1504 cpp_set_lang (parse_in, c94 ? CLK_STDC94: iso ? CLK_STDC89: CLK_GNUC89);
1507 flag_no_gnu_keywords = iso;
1508 flag_no_nonansi_builtin = iso;
1513 /* Set the C 99 standard (without GNU extensions if ISO). */
1515 set_std_c99 (int iso)
1517 cpp_set_lang (parse_in, iso ? CLK_STDC99: CLK_GNUC99);
1519 flag_no_nonansi_builtin = iso;
1525 /* Set the C++ 98 standard (without GNU extensions if ISO). */
1527 set_std_cxx98 (int iso)
1529 cpp_set_lang (parse_in, iso ? CLK_CXX98: CLK_GNUCXX);
1530 flag_no_gnu_keywords = iso;
1531 flag_no_nonansi_builtin = iso;
1535 /* Handle setting implicit to ON. */
1537 set_Wimplicit (int on)
1540 warn_implicit_int = on;
1543 if (mesg_implicit_function_declaration != 2)
1544 mesg_implicit_function_declaration = 1;
1547 mesg_implicit_function_declaration = 0;
1550 /* Args to -d specify what to dump. Silently ignore
1551 unrecognized options; they may be aimed at toplev.c. */
1553 handle_OPT_d (const char *arg)
1557 while ((c = *arg++) != '\0')
1560 case 'M': /* Dump macros only. */
1561 case 'N': /* Dump names. */
1562 case 'D': /* Dump definitions. */
1563 flag_dump_macros = c;
1567 flag_dump_includes = 1;