1 /* C/ObjC/C++ command line option handling.
2 Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
3 Contributed by Neil Booth.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
24 #include "coretypes.h"
31 #include "langhooks.h"
32 #include "tree-inline.h"
33 #include "diagnostic.h"
35 #include "cppdefault.h"
36 #include "c-incpath.h"
37 #include "debug.h" /* For debug_hooks. */
42 #ifndef DOLLARS_IN_IDENTIFIERS
43 # define DOLLARS_IN_IDENTIFIERS true
46 #ifndef TARGET_SYSTEM_ROOT
47 # define TARGET_SYSTEM_ROOT NULL
51 #define TARGET_OPTF(ARG)
55 static cpp_options *cpp_opts;
58 static const char *this_input_filename;
60 /* Filename and stream for preprocessed output. */
61 static const char *out_fname;
62 static FILE *out_stream;
64 /* Append dependencies to deps_file. */
65 static bool deps_append;
67 /* If dependency switches (-MF etc.) have been given. */
68 static bool deps_seen;
73 /* Dependency output file. */
74 static const char *deps_file;
76 /* The prefix given by -iprefix, if any. */
77 static const char *iprefix;
79 /* The system root, if any. Overridden by -isysroot. */
80 static const char *sysroot = TARGET_SYSTEM_ROOT;
82 /* Zero disables all standard directories for headers. */
83 static bool std_inc = true;
85 /* Zero disables the C++-specific standard directories for headers. */
86 static bool std_cxx_inc = true;
88 /* If the quote chain has been split by -I-. */
89 static bool quote_chain_split;
91 /* If -Wunused-macros. */
92 static bool warn_unused_macros;
94 /* If -Wvariadic-macros. */
95 static bool warn_variadic_macros = true;
97 /* Number of deferred options. */
98 static size_t deferred_count;
100 /* Number of deferred options scanned for -include. */
101 static size_t include_cursor;
103 /* Permit Fortran front-end options. */
104 static bool permit_fortran_options;
106 static void set_Wimplicit (int);
107 static void handle_OPT_d (const char *);
108 static void set_std_cxx98 (int);
109 static void set_std_c89 (int, int);
110 static void set_std_c99 (int);
111 static void check_deps_environment_vars (void);
112 static void handle_deferred_opts (void);
113 static void sanitize_cpp_opts (void);
114 static void add_prefixed_path (const char *, size_t);
115 static void push_command_line_include (void);
116 static void cb_file_change (cpp_reader *, const struct line_map *);
117 static void cb_dir_change (cpp_reader *, const char *);
118 static void finish_options (void);
120 #ifndef STDC_0_IN_SYSTEM_HEADERS
121 #define STDC_0_IN_SYSTEM_HEADERS 0
124 /* Holds switches parsed by c_common_handle_option (), but whose
125 handling is deferred to c_common_post_options (). */
126 static void defer_opt (enum opt_code, const char *);
127 static struct deferred_opt
133 /* Complain that switch CODE expects an argument but none was
134 provided. OPT was the command-line option. Return FALSE to get
135 the default message in opts.c, TRUE if we provide a specialized
138 c_common_missing_argument (const char *opt, size_t code)
143 /* Pick up the default message. */
146 case OPT_fconstant_string_class_:
147 error ("no class name specified with \"%s\"", opt);
151 error ("assertion missing after \"%s\"", opt);
156 error ("macro name missing after \"%s\"", opt);
165 error ("missing path after \"%s\"", opt);
174 error ("missing filename after \"%s\"", opt);
179 error ("missing makefile target after \"%s\"", opt);
186 /* Defer option CODE with argument ARG. */
188 defer_opt (enum opt_code code, const char *arg)
190 deferred_opts[deferred_count].code = code;
191 deferred_opts[deferred_count].arg = arg;
195 /* Common initialization before parsing options. */
197 c_common_init_options (unsigned int argc, const char **argv ATTRIBUTE_UNUSED)
199 static const unsigned int lang_flags[] = {CL_C, CL_ObjC, CL_CXX, CL_ObjCXX};
202 /* This is conditionalized only because that is the way the front
203 ends used to do it. Maybe this should be unconditional? */
204 if (c_dialect_cxx ())
206 /* By default wrap lines at 80 characters. Is getenv
207 ("COLUMNS") preferable? */
208 diagnostic_line_cutoff (global_dc) = 80;
209 /* By default, emit location information once for every
210 diagnostic message. */
211 diagnostic_prefixing_rule (global_dc) = DIAGNOSTICS_SHOW_PREFIX_ONCE;
214 parse_in = cpp_create_reader (c_dialect_cxx () ? CLK_GNUCXX: CLK_GNUC89,
215 ident_hash, &line_table);
217 cpp_opts = cpp_get_options (parse_in);
218 cpp_opts->dollars_in_ident = DOLLARS_IN_IDENTIFIERS;
219 cpp_opts->objc = c_dialect_objc ();
221 /* Reset to avoid warnings on internal definitions. We set it just
222 before passing on command-line options to cpplib. */
223 cpp_opts->warn_dollars = 0;
225 flag_const_strings = c_dialect_cxx ();
226 flag_exceptions = c_dialect_cxx ();
227 warn_pointer_arith = c_dialect_cxx ();
229 deferred_opts = xmalloc (argc * sizeof (struct deferred_opt));
231 result = lang_flags[c_language];
233 /* If potentially preprocessing Fortran we have to accept its front
234 end options since the driver passes most of them through. */
236 if (c_language == clk_c && argc > 2
237 && !strcmp (argv[2], "-traditional-cpp" ))
239 permit_fortran_options = true;
247 /* Handle switch SCODE with argument ARG. VALUE is true, unless no-
248 form of an -f or -W option was given. Returns 0 if the switch was
249 invalid, a negative number to prevent language-independent
250 processing in toplev.c (a hack necessary for the short-term). */
252 c_common_handle_option (size_t scode, const char *arg, int value)
254 const struct cl_option *option = &cl_options[scode];
255 enum opt_code code = (enum opt_code) scode;
261 if (cl_options[code].flags & (CL_C | CL_CXX | CL_ObjC | CL_ObjCXX))
263 result = permit_fortran_options;
266 case OPT__output_pch_:
271 defer_opt (code, arg);
275 cpp_opts->discard_comments = 0;
279 cpp_opts->discard_comments = 0;
280 cpp_opts->discard_comments_in_macro_exp = 0;
284 defer_opt (code, arg);
288 flag_preprocess_only = 1;
292 cpp_opts->print_include_names = 1;
296 TARGET_OPTF (xstrdup (arg));
300 if (strcmp (arg, "-"))
301 add_path (xstrdup (arg), BRACKET, 0, true);
304 if (quote_chain_split)
305 error ("-I- specified twice");
306 quote_chain_split = true;
307 split_quote_chain ();
308 inform ("obsolete option -I- used, please use -iquote instead");
314 /* When doing dependencies with -M or -MM, suppress normal
315 preprocessed output, but still do -dM etc. as software
316 depends on this. Preprocessed output does occur if -MD, -MMD
317 or environment var dependency generation is used. */
318 cpp_opts->deps.style = (code == OPT_M ? DEPS_SYSTEM: DEPS_USER);
320 cpp_opts->inhibit_warnings = 1;
325 cpp_opts->deps.style = (code == OPT_MD ? DEPS_SYSTEM: DEPS_USER);
336 cpp_opts->deps.missing_files = true;
341 cpp_opts->deps.phony_targets = true;
347 defer_opt (code, arg);
351 flag_no_line_commands = 1;
354 case OPT_fworking_directory:
355 flag_working_directory = value;
359 defer_opt (code, arg);
365 set_Wimplicit (value);
366 warn_char_subscripts = value;
367 warn_missing_braces = value;
368 warn_parentheses = value;
369 warn_return_type = value;
370 warn_sequence_point = value; /* Was C only. */
371 if (c_dialect_cxx ())
372 warn_sign_compare = value;
374 warn_strict_aliasing = value;
376 /* Only warn about unknown pragmas that are not in system
378 warn_unknown_pragmas = value;
380 /* We save the value of warn_uninitialized, since if they put
381 -Wuninitialized on the command line, we need to generate a
382 warning about not using it without also specifying -O. */
383 if (warn_uninitialized != 1)
384 warn_uninitialized = (value ? 2 : 0);
386 if (!c_dialect_cxx ())
387 /* We set this to 2 here, but 1 in -Wmain, so -ffreestanding
388 can turn it off only if it's not explicit. */
389 warn_main = value * 2;
392 /* C++-specific warnings. */
393 warn_nonvdtor = value;
394 warn_reorder = value;
395 warn_nontemplate_friend = value;
398 cpp_opts->warn_trigraphs = value;
399 cpp_opts->warn_comments = value;
400 cpp_opts->warn_num_sign_change = value;
401 cpp_opts->warn_multichar = value; /* Was C++ only. */
406 cpp_opts->warn_comments = value;
409 case OPT_Wdeprecated:
410 cpp_opts->warn_deprecated = value;
413 case OPT_Wdiv_by_zero:
414 warn_div_by_zero = value;
417 case OPT_Wendif_labels:
418 cpp_opts->warn_endif_labels = value;
422 cpp_opts->warnings_are_errors = value;
425 case OPT_Werror_implicit_function_declaration:
426 mesg_implicit_function_declaration = 2;
434 set_Wformat (atoi (arg));
438 set_Wimplicit (value);
442 /* Silently ignore for now. */
445 case OPT_Winvalid_pch:
446 cpp_opts->warn_invalid_pch = value;
456 case OPT_Wmissing_include_dirs:
457 cpp_opts->warn_missing_include_dirs = value;
461 cpp_opts->warn_multichar = value;
464 case OPT_Wreturn_type:
465 warn_return_type = value;
468 case OPT_Wsystem_headers:
469 cpp_opts->warn_system_headers = value;
472 case OPT_Wtraditional:
473 cpp_opts->warn_traditional = value;
477 cpp_opts->warn_trigraphs = value;
481 cpp_opts->warn_undef = value;
484 case OPT_Wunknown_pragmas:
485 /* Set to greater than 1, so that even unknown pragmas in
486 system headers will be warned about. */
487 warn_unknown_pragmas = value * 2;
490 case OPT_Wunused_macros:
491 warn_unused_macros = value;
494 case OPT_Wvariadic_macros:
495 warn_variadic_macros = value;
498 case OPT_Wwrite_strings:
499 if (!c_dialect_cxx ())
500 flag_const_strings = value;
502 warn_write_strings = value;
506 if (!c_dialect_cxx ())
507 set_std_c89 (false, true);
509 set_std_cxx98 (true);
516 case OPT_fcond_mismatch:
517 if (!c_dialect_cxx ())
519 flag_cond_mismatch = value;
524 case OPT_fall_virtual:
525 case OPT_falt_external_templates:
526 case OPT_fenum_int_equiv:
527 case OPT_fexternal_templates:
528 case OPT_fguiding_decls:
530 case OPT_fhuge_objects:
532 case OPT_fname_mangling_version_:
534 case OPT_fnonnull_objects:
536 case OPT_fstrict_prototype:
537 case OPT_fthis_is_variable:
538 case OPT_fvtable_thunks:
541 warning ("switch \"%s\" is no longer supported", option->opt_text);
544 case OPT_faccess_control:
545 flag_access_control = value;
549 flag_no_asm = !value;
553 flag_no_builtin = !value;
560 disable_builtin_function (arg);
563 case OPT_fdollars_in_identifiers:
564 cpp_opts->dollars_in_ident = value;
567 case OPT_ffreestanding:
569 /* Fall through.... */
572 flag_no_builtin = !value;
573 /* warn_main will be 2 if set by -Wall, 1 if set by -Wmain */
574 if (!value && warn_main == 2)
578 case OPT_fshort_double:
579 flag_short_double = value;
582 case OPT_fshort_enums:
583 flag_short_enums = value;
586 case OPT_fshort_wchar:
587 flag_short_wchar = value;
590 case OPT_fsigned_bitfields:
591 flag_signed_bitfields = value;
592 explicit_flag_signed_bitfields = 1;
595 case OPT_fsigned_char:
596 flag_signed_char = value;
599 case OPT_funsigned_bitfields:
600 flag_signed_bitfields = !value;
601 explicit_flag_signed_bitfields = 1;
604 case OPT_funsigned_char:
605 flag_signed_char = !value;
609 flag_check_new = value;
612 case OPT_fconserve_space:
613 flag_conserve_space = value;
616 case OPT_fconst_strings:
617 flag_const_strings = value;
620 case OPT_fconstant_string_class_:
621 constant_string_class_name = arg;
624 case OPT_fdefault_inline:
625 flag_default_inline = value;
628 case OPT_felide_constructors:
629 flag_elide_constructors = value;
632 case OPT_fenforce_eh_specs:
633 flag_enforce_eh_specs = value;
636 case OPT_ffixed_form:
637 case OPT_ffixed_line_length_:
638 /* Fortran front end options ignored when preprocessing only. */
639 if (!flag_preprocess_only)
644 flag_new_for_scope = value;
647 case OPT_fgnu_keywords:
648 flag_no_gnu_keywords = !value;
651 case OPT_fgnu_runtime:
652 flag_next_runtime = !value;
655 case OPT_fhandle_exceptions:
656 warning ("-fhandle-exceptions has been renamed -fexceptions (and is now on by default)");
657 flag_exceptions = value;
660 case OPT_fimplement_inlines:
661 flag_implement_inlines = value;
664 case OPT_fimplicit_inline_templates:
665 flag_implicit_inline_templates = value;
668 case OPT_fimplicit_templates:
669 flag_implicit_templates = value;
672 case OPT_fms_extensions:
673 flag_ms_extensions = value;
676 case OPT_fnext_runtime:
677 flag_next_runtime = value;
680 case OPT_fnil_receivers:
681 flag_nil_receivers = value;
684 case OPT_fnonansi_builtins:
685 flag_no_nonansi_builtin = !value;
688 case OPT_fobjc_exceptions:
689 flag_objc_exceptions = value;
692 case OPT_fobjc_sjlj_exceptions:
693 flag_objc_sjlj_exceptions = value;
696 case OPT_foperator_names:
697 cpp_opts->operator_names = value;
700 case OPT_foptional_diags:
701 flag_optional_diags = value;
705 cpp_opts->restore_pch_deps = value;
708 case OPT_fpch_preprocess:
709 flag_pch_preprocess = value;
712 case OPT_fpermissive:
713 flag_permissive = value;
716 case OPT_fpreprocessed:
717 cpp_opts->preprocessed = value;
720 case OPT_freplace_objc_classes:
721 flag_replace_objc_classes = value;
725 flag_use_repository = value;
727 flag_implicit_templates = 0;
734 case OPT_fshow_column:
735 cpp_opts->show_column = value;
739 flag_detailed_statistics = value;
743 /* It is documented that we silently ignore silly values. */
744 if (value >= 1 && value <= 100)
745 cpp_opts->tabstop = value;
748 case OPT_fexec_charset_:
749 cpp_opts->narrow_charset = arg;
752 case OPT_fwide_exec_charset_:
753 cpp_opts->wide_charset = arg;
756 case OPT_finput_charset_:
757 cpp_opts->input_charset = arg;
760 case OPT_ftemplate_depth_:
761 max_tinst_depth = value;
764 case OPT_fuse_cxa_atexit:
765 flag_use_cxa_atexit = value;
773 flag_zero_link = value;
777 flag_gen_declaration = 1;
781 add_path (xstrdup (arg), AFTER, 0, true);
786 defer_opt (code, arg);
794 add_path (xstrdup (arg), QUOTE, 0, true);
802 add_path (xstrdup (arg), SYSTEM, 0, true);
805 case OPT_iwithprefix:
806 add_prefixed_path (arg, SYSTEM);
809 case OPT_iwithprefixbefore:
810 add_prefixed_path (arg, BRACKET);
814 cpp_set_lang (parse_in, CLK_ASM);
815 cpp_opts->dollars_in_ident = false;
834 error ("output filename specified twice");
837 /* We need to handle the -pedantic switches here, rather than in
838 c_common_post_options, so that a subsequent -Wno-endif-labels
839 is not overridden. */
840 case OPT_pedantic_errors:
841 cpp_opts->pedantic_errors = 1;
844 cpp_opts->pedantic = 1;
845 cpp_opts->warn_endif_labels = 1;
848 case OPT_print_objc_runtime_info:
849 print_struct_values = 1;
857 case OPT_std_gnu__98:
858 set_std_cxx98 (code == OPT_std_c__98 /* ISO */);
862 case OPT_std_iso9899_1990:
863 case OPT_std_iso9899_199409:
864 set_std_c89 (code == OPT_std_iso9899_199409 /* c94 */, true /* ISO */);
868 set_std_c89 (false /* c94 */, false /* ISO */);
873 case OPT_std_iso9899_1999:
874 case OPT_std_iso9899_199x:
875 set_std_c99 (true /* ISO */);
880 set_std_c99 (false /* ISO */);
884 cpp_opts->trigraphs = 1;
887 case OPT_traditional_cpp:
888 cpp_opts->traditional = 1;
896 cpp_opts->inhibit_warnings = 1;
907 /* Post-switch processing. */
909 c_common_post_options (const char **pfilename)
911 struct cpp_callbacks *cb;
913 /* Canonicalize the input and output filenames. */
914 if (in_fnames == NULL)
916 in_fnames = xmalloc (sizeof (in_fnames[0]));
919 else if (strcmp (in_fnames[0], "-") == 0)
922 if (out_fname == NULL || !strcmp (out_fname, "-"))
925 if (cpp_opts->deps.style == DEPS_NONE)
926 check_deps_environment_vars ();
928 handle_deferred_opts ();
930 sanitize_cpp_opts ();
932 register_include_chains (parse_in, sysroot, iprefix,
933 std_inc, std_cxx_inc && c_dialect_cxx (), verbose);
935 flag_inline_trees = 1;
937 /* Use tree inlining. */
940 if (flag_inline_functions)
942 flag_inline_trees = 2;
943 flag_inline_functions = 0;
946 /* Default to ObjC sjlj exception handling if NeXT runtime. */
947 if (flag_objc_sjlj_exceptions < 0)
948 flag_objc_sjlj_exceptions = flag_next_runtime;
949 if (flag_objc_exceptions && !flag_objc_sjlj_exceptions)
952 /* -Wextra implies -Wsign-compare, but not if explicitly
954 if (warn_sign_compare == -1)
955 warn_sign_compare = extra_warnings;
957 /* Special format checking options don't work without -Wformat; warn if
959 if (warn_format_y2k && !warn_format)
960 warning ("-Wformat-y2k ignored without -Wformat");
961 if (warn_format_extra_args && !warn_format)
962 warning ("-Wformat-extra-args ignored without -Wformat");
963 if (warn_format_zero_length && !warn_format)
964 warning ("-Wformat-zero-length ignored without -Wformat");
965 if (warn_format_nonliteral && !warn_format)
966 warning ("-Wformat-nonliteral ignored without -Wformat");
967 if (warn_format_security && !warn_format)
968 warning ("-Wformat-security ignored without -Wformat");
969 if (warn_missing_format_attribute && !warn_format)
970 warning ("-Wmissing-format-attribute ignored without -Wformat");
972 if (flag_preprocess_only)
974 /* Open the output now. We must do so even if flag_no_output is
975 on, because there may be other output than from the actual
976 preprocessing (e.g. from -dM). */
977 if (out_fname[0] == '\0')
980 out_stream = fopen (out_fname, "w");
982 if (out_stream == NULL)
984 fatal_error ("opening output file %s: %m", out_fname);
988 if (num_in_fnames > 1)
989 error ("too many filenames given. Type %s --help for usage",
992 init_pp_output (out_stream);
998 /* Yuk. WTF is this? I do know ObjC relies on it somewhere. */
999 input_location = UNKNOWN_LOCATION;
1002 cb = cpp_get_callbacks (parse_in);
1003 cb->file_change = cb_file_change;
1004 cb->dir_change = cb_dir_change;
1005 cpp_post_options (parse_in);
1007 input_location = UNKNOWN_LOCATION;
1009 /* If an error has occurred in cpplib, note it so we fail
1011 errorcount += cpp_errors (parse_in);
1013 *pfilename = this_input_filename
1014 = cpp_read_main_file (parse_in, in_fnames[0]);
1015 /* Don't do any compilation or preprocessing if there is no input file. */
1016 if (this_input_filename == NULL)
1022 if (flag_working_directory
1023 && flag_preprocess_only && ! flag_no_line_commands)
1024 pp_dir_change (parse_in, get_src_pwd ());
1026 return flag_preprocess_only;
1029 /* Front end initialization common to C, ObjC and C++. */
1031 c_common_init (void)
1033 /* Set up preprocessor arithmetic. Must be done after call to
1034 c_common_nodes_and_builtins for type nodes to be good. */
1035 cpp_opts->precision = TYPE_PRECISION (intmax_type_node);
1036 cpp_opts->char_precision = TYPE_PRECISION (char_type_node);
1037 cpp_opts->int_precision = TYPE_PRECISION (integer_type_node);
1038 cpp_opts->wchar_precision = TYPE_PRECISION (wchar_type_node);
1039 cpp_opts->unsigned_wchar = TYPE_UNSIGNED (wchar_type_node);
1040 cpp_opts->bytes_big_endian = BYTES_BIG_ENDIAN;
1042 /* This can't happen until after wchar_precision and bytes_big_endian
1044 cpp_init_iconv (parse_in);
1046 if (flag_preprocess_only)
1049 preprocess_file (parse_in);
1053 /* Has to wait until now so that cpplib has its hash table. */
1059 /* Initialize the integrated preprocessor after debug output has been
1060 initialized; loop over each input file. */
1062 c_common_parse_file (int set_yydebug)
1065 yydebug = set_yydebug;
1068 warning ("YYDEBUG not defined");
1071 if (num_in_fnames > 1)
1072 fatal_error ("sorry, inter-module analysis temporarily out of commission");
1082 /* Common finish hook for the C, ObjC and C++ front ends. */
1084 c_common_finish (void)
1086 FILE *deps_stream = NULL;
1088 if (cpp_opts->deps.style != DEPS_NONE)
1090 /* If -M or -MM was seen without -MF, default output to the
1093 deps_stream = out_stream;
1096 deps_stream = fopen (deps_file, deps_append ? "a": "w");
1098 fatal_error ("opening dependency file %s: %m", deps_file);
1102 /* For performance, avoid tearing down cpplib's internal structures
1103 with cpp_destroy (). */
1104 errorcount += cpp_finish (parse_in, deps_stream);
1106 if (deps_stream && deps_stream != out_stream
1107 && (ferror (deps_stream) || fclose (deps_stream)))
1108 fatal_error ("closing dependency file %s: %m", deps_file);
1110 if (out_stream && (ferror (out_stream) || fclose (out_stream)))
1111 fatal_error ("when writing output to %s: %m", out_fname);
1114 /* Either of two environment variables can specify output of
1115 dependencies. Their value is either "OUTPUT_FILE" or "OUTPUT_FILE
1116 DEPS_TARGET", where OUTPUT_FILE is the file to write deps info to
1117 and DEPS_TARGET is the target to mention in the deps. They also
1118 result in dependency information being appended to the output file
1119 rather than overwriting it, and like Sun's compiler
1120 SUNPRO_DEPENDENCIES suppresses the dependency on the main file. */
1122 check_deps_environment_vars (void)
1126 GET_ENVIRONMENT (spec, "DEPENDENCIES_OUTPUT");
1128 cpp_opts->deps.style = DEPS_USER;
1131 GET_ENVIRONMENT (spec, "SUNPRO_DEPENDENCIES");
1134 cpp_opts->deps.style = DEPS_SYSTEM;
1135 cpp_opts->deps.ignore_main_file = true;
1141 /* Find the space before the DEPS_TARGET, if there is one. */
1142 char *s = strchr (spec, ' ');
1145 /* Let the caller perform MAKE quoting. */
1146 defer_opt (OPT_MT, s + 1);
1150 /* Command line -MF overrides environment variables and default. */
1158 /* Handle deferred command line switches. */
1160 handle_deferred_opts (void)
1165 /* Avoid allocating the deps buffer if we don't need it.
1166 (This flag may be true without there having been -MT or -MQ
1167 options, but we'll still need the deps buffer.) */
1171 deps = cpp_get_deps (parse_in);
1173 for (i = 0; i < deferred_count; i++)
1175 struct deferred_opt *opt = &deferred_opts[i];
1177 if (opt->code == OPT_MT || opt->code == OPT_MQ)
1178 deps_add_target (deps, opt->arg, opt->code == OPT_MQ);
1182 /* These settings are appropriate for GCC, but not necessarily so for
1183 cpplib as a library. */
1185 sanitize_cpp_opts (void)
1187 /* If we don't know what style of dependencies to output, complain
1188 if any other dependency switches have been given. */
1189 if (deps_seen && cpp_opts->deps.style == DEPS_NONE)
1190 error ("to generate dependencies you must specify either -M or -MM");
1192 /* -dM and dependencies suppress normal output; do it here so that
1193 the last -d[MDN] switch overrides earlier ones. */
1194 if (flag_dump_macros == 'M')
1197 /* Disable -dD, -dN and -dI if normal output is suppressed. Allow
1198 -dM since at least glibc relies on -M -dM to work. */
1201 if (flag_dump_macros != 'M')
1202 flag_dump_macros = 0;
1203 flag_dump_includes = 0;
1206 cpp_opts->unsigned_char = !flag_signed_char;
1207 cpp_opts->stdc_0_in_system_headers = STDC_0_IN_SYSTEM_HEADERS;
1209 /* We want -Wno-long-long to override -pedantic -std=non-c99
1210 and/or -Wtraditional, whatever the ordering. */
1211 cpp_opts->warn_long_long
1212 = warn_long_long && ((!flag_isoc99 && pedantic) || warn_traditional);
1214 /* Similarly with -Wno-variadic-macros. No check for c99 here, since
1215 this also turns off warnings about GCCs extension. */
1216 cpp_opts->warn_variadic_macros
1217 = warn_variadic_macros && (pedantic || warn_traditional);
1219 /* If we're generating preprocessor output, emit current directory
1220 if explicitly requested or if debugging information is enabled.
1221 ??? Maybe we should only do it for debugging formats that
1222 actually output the current directory? */
1223 if (flag_working_directory == -1)
1224 flag_working_directory = (debug_info_level != DINFO_LEVEL_NONE);
1227 /* Add include path with a prefix at the front of its name. */
1229 add_prefixed_path (const char *suffix, size_t chain)
1233 size_t prefix_len, suffix_len;
1235 suffix_len = strlen (suffix);
1236 prefix = iprefix ? iprefix : cpp_GCC_INCLUDE_DIR;
1237 prefix_len = iprefix ? strlen (iprefix) : cpp_GCC_INCLUDE_DIR_len;
1239 path = xmalloc (prefix_len + suffix_len + 1);
1240 memcpy (path, prefix, prefix_len);
1241 memcpy (path + prefix_len, suffix, suffix_len);
1242 path[prefix_len + suffix_len] = '\0';
1244 add_path (path, chain, 0, false);
1247 /* Handle -D, -U, -A, -imacros, and the first -include. */
1249 finish_options (void)
1251 if (!cpp_opts->preprocessed)
1255 cpp_change_file (parse_in, LC_RENAME, _("<built-in>"));
1256 cpp_init_builtins (parse_in, flag_hosted);
1257 c_cpp_builtins (parse_in);
1259 /* We're about to send user input to cpplib, so make it warn for
1260 things that we previously (when we sent it internal definitions)
1261 told it to not warn.
1263 C99 permits implementation-defined characters in identifiers.
1264 The documented meaning of -std= is to turn off extensions that
1265 conflict with the specified standard, and since a strictly
1266 conforming program cannot contain a '$', we do not condition
1267 their acceptance on the -std= setting. */
1268 cpp_opts->warn_dollars = (cpp_opts->pedantic && !cpp_opts->c99);
1270 cpp_change_file (parse_in, LC_RENAME, _("<command line>"));
1271 for (i = 0; i < deferred_count; i++)
1273 struct deferred_opt *opt = &deferred_opts[i];
1275 if (opt->code == OPT_D)
1276 cpp_define (parse_in, opt->arg);
1277 else if (opt->code == OPT_U)
1278 cpp_undef (parse_in, opt->arg);
1279 else if (opt->code == OPT_A)
1281 if (opt->arg[0] == '-')
1282 cpp_unassert (parse_in, opt->arg + 1);
1284 cpp_assert (parse_in, opt->arg);
1288 /* Handle -imacros after -D and -U. */
1289 for (i = 0; i < deferred_count; i++)
1291 struct deferred_opt *opt = &deferred_opts[i];
1293 if (opt->code == OPT_imacros
1294 && cpp_push_include (parse_in, opt->arg))
1296 /* Disable push_command_line_include callback for now. */
1297 include_cursor = deferred_count + 1;
1298 cpp_scan_nooutput (parse_in);
1304 push_command_line_include ();
1307 /* Give CPP the next file given by -include, if any. */
1309 push_command_line_include (void)
1311 while (include_cursor < deferred_count)
1313 struct deferred_opt *opt = &deferred_opts[include_cursor++];
1315 if (! cpp_opts->preprocessed && opt->code == OPT_include
1316 && cpp_push_include (parse_in, opt->arg))
1320 if (include_cursor == deferred_count)
1323 /* -Wunused-macros should only warn about macros defined hereafter. */
1324 cpp_opts->warn_unused_macros = warn_unused_macros;
1325 /* Restore the line map from <command line>. */
1326 if (! cpp_opts->preprocessed)
1327 cpp_change_file (parse_in, LC_RENAME, main_input_filename);
1329 /* Set this here so the client can change the option if it wishes,
1330 and after stacking the main file so we don't trace the main file. */
1331 line_table.trace_includes = cpp_opts->print_include_names;
1335 /* File change callback. Has to handle -include files. */
1337 cb_file_change (cpp_reader *pfile ATTRIBUTE_UNUSED,
1338 const struct line_map *new_map)
1340 if (flag_preprocess_only)
1341 pp_file_change (new_map);
1343 fe_file_change (new_map);
1345 if (new_map == 0 || (new_map->reason == LC_LEAVE && MAIN_FILE_P (new_map)))
1346 push_command_line_include ();
1350 cb_dir_change (cpp_reader *pfile ATTRIBUTE_UNUSED, const char *dir)
1352 if (! set_src_pwd (dir))
1353 warning ("too late for # directive to set debug directory");
1356 /* Set the C 89 standard (with 1994 amendments if C94, without GNU
1357 extensions if ISO). There is no concept of gnu94. */
1359 set_std_c89 (int c94, int iso)
1361 cpp_set_lang (parse_in, c94 ? CLK_STDC94: iso ? CLK_STDC89: CLK_GNUC89);
1364 flag_no_gnu_keywords = iso;
1365 flag_no_nonansi_builtin = iso;
1370 /* Set the C 99 standard (without GNU extensions if ISO). */
1372 set_std_c99 (int iso)
1374 cpp_set_lang (parse_in, iso ? CLK_STDC99: CLK_GNUC99);
1376 flag_no_nonansi_builtin = iso;
1382 /* Set the C++ 98 standard (without GNU extensions if ISO). */
1384 set_std_cxx98 (int iso)
1386 cpp_set_lang (parse_in, iso ? CLK_CXX98: CLK_GNUCXX);
1387 flag_no_gnu_keywords = iso;
1388 flag_no_nonansi_builtin = iso;
1392 /* Handle setting implicit to ON. */
1394 set_Wimplicit (int on)
1397 warn_implicit_int = on;
1400 if (mesg_implicit_function_declaration != 2)
1401 mesg_implicit_function_declaration = 1;
1404 mesg_implicit_function_declaration = 0;
1407 /* Args to -d specify what to dump. Silently ignore
1408 unrecognized options; they may be aimed at toplev.c. */
1410 handle_OPT_d (const char *arg)
1414 while ((c = *arg++) != '\0')
1417 case 'M': /* Dump macros only. */
1418 case 'N': /* Dump names. */
1419 case 'D': /* Dump definitions. */
1420 flag_dump_macros = c;
1424 flag_dump_includes = 1;