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)
54 static int saved_lineno;
57 static cpp_options *cpp_opts;
60 static const char *this_input_filename;
62 /* Filename and stream for preprocessed output. */
63 static const char *out_fname;
64 static FILE *out_stream;
66 /* Append dependencies to deps_file. */
67 static bool deps_append;
69 /* If dependency switches (-MF etc.) have been given. */
70 static bool deps_seen;
75 /* Dependency output file. */
76 static const char *deps_file;
78 /* The prefix given by -iprefix, if any. */
79 static const char *iprefix;
81 /* The system root, if any. Overridden by -isysroot. */
82 static const char *sysroot = TARGET_SYSTEM_ROOT;
84 /* Zero disables all standard directories for headers. */
85 static bool std_inc = true;
87 /* Zero disables the C++-specific standard directories for headers. */
88 static bool std_cxx_inc = true;
90 /* If the quote chain has been split by -I-. */
91 static bool quote_chain_split;
93 /* If -Wunused-macros. */
94 static bool warn_unused_macros;
96 /* If -Wvariadic-macros. */
97 static bool warn_variadic_macros = true;
99 /* Number of deferred options. */
100 static size_t deferred_count;
102 /* Number of deferred options scanned for -include. */
103 static size_t include_cursor;
105 /* Permit Fortran front-end options. */
106 static bool permit_fortran_options;
108 static void set_Wimplicit (int);
109 static void handle_OPT_d (const char *);
110 static void set_std_cxx98 (int);
111 static void set_std_c89 (int, int);
112 static void set_std_c99 (int);
113 static void check_deps_environment_vars (void);
114 static void handle_deferred_opts (void);
115 static void sanitize_cpp_opts (void);
116 static void add_prefixed_path (const char *, size_t);
117 static void push_command_line_include (void);
118 static void cb_file_change (cpp_reader *, const struct line_map *);
119 static void cb_dir_change (cpp_reader *, const char *);
120 static void finish_options (void);
122 #ifndef STDC_0_IN_SYSTEM_HEADERS
123 #define STDC_0_IN_SYSTEM_HEADERS 0
126 /* Holds switches parsed by c_common_handle_option (), but whose
127 handling is deferred to c_common_post_options (). */
128 static void defer_opt (enum opt_code, const char *);
129 static struct deferred_opt
135 /* Complain that switch CODE expects an argument but none was
136 provided. OPT was the command-line option. Return FALSE to get
137 the default message in opts.c, TRUE if we provide a specialized
140 c_common_missing_argument (const char *opt, size_t code)
145 /* Pick up the default message. */
148 case OPT_fconstant_string_class_:
149 error ("no class name specified with \"%s\"", opt);
153 error ("assertion missing after \"%s\"", opt);
158 error ("macro name missing after \"%s\"", opt);
167 error ("missing path after \"%s\"", opt);
176 error ("missing filename after \"%s\"", opt);
181 error ("missing makefile target after \"%s\"", opt);
188 /* Defer option CODE with argument ARG. */
190 defer_opt (enum opt_code code, const char *arg)
192 deferred_opts[deferred_count].code = code;
193 deferred_opts[deferred_count].arg = arg;
197 /* Common initialization before parsing options. */
199 c_common_init_options (unsigned int argc, const char **argv ATTRIBUTE_UNUSED)
201 static const unsigned int lang_flags[] = {CL_C, CL_ObjC, CL_CXX, CL_ObjCXX};
204 /* This is conditionalized only because that is the way the front
205 ends used to do it. Maybe this should be unconditional? */
206 if (c_dialect_cxx ())
208 /* By default wrap lines at 80 characters. Is getenv
209 ("COLUMNS") preferable? */
210 diagnostic_line_cutoff (global_dc) = 80;
211 /* By default, emit location information once for every
212 diagnostic message. */
213 diagnostic_prefixing_rule (global_dc) = DIAGNOSTICS_SHOW_PREFIX_ONCE;
216 parse_in = cpp_create_reader (c_dialect_cxx () ? CLK_GNUCXX: CLK_GNUC89,
217 ident_hash, &line_table);
219 cpp_opts = cpp_get_options (parse_in);
220 cpp_opts->dollars_in_ident = DOLLARS_IN_IDENTIFIERS;
221 cpp_opts->objc = c_dialect_objc ();
223 /* Reset to avoid warnings on internal definitions. We set it just
224 before passing on command-line options to cpplib. */
225 cpp_opts->warn_dollars = 0;
227 flag_const_strings = c_dialect_cxx ();
228 flag_exceptions = c_dialect_cxx ();
229 warn_pointer_arith = c_dialect_cxx ();
231 deferred_opts = xmalloc (argc * sizeof (struct deferred_opt));
233 result = lang_flags[c_language];
235 /* If potentially preprocessing Fortran we have to accept its front
236 end options since the driver passes most of them through. */
238 if (c_language == clk_c && argc > 2
239 && !strcmp (argv[2], "-traditional-cpp" ))
241 permit_fortran_options = true;
249 /* Handle switch SCODE with argument ARG. VALUE is true, unless no-
250 form of an -f or -W option was given. Returns 0 if the switch was
251 invalid, a negative number to prevent language-independent
252 processing in toplev.c (a hack necessary for the short-term). */
254 c_common_handle_option (size_t scode, const char *arg, int value)
256 const struct cl_option *option = &cl_options[scode];
257 enum opt_code code = (enum opt_code) scode;
263 if (cl_options[code].flags & (CL_C | CL_CXX | CL_ObjC | CL_ObjCXX))
265 result = permit_fortran_options;
268 case OPT__output_pch_:
273 defer_opt (code, arg);
277 cpp_opts->discard_comments = 0;
281 cpp_opts->discard_comments = 0;
282 cpp_opts->discard_comments_in_macro_exp = 0;
286 defer_opt (code, arg);
290 flag_preprocess_only = 1;
294 cpp_opts->print_include_names = 1;
298 TARGET_OPTF (xstrdup (arg));
302 if (strcmp (arg, "-"))
303 add_path (xstrdup (arg), BRACKET, 0, true);
306 if (quote_chain_split)
307 error ("-I- specified twice");
308 quote_chain_split = true;
309 split_quote_chain ();
310 inform ("obsolete option -I- used, please use -iquote instead");
316 /* When doing dependencies with -M or -MM, suppress normal
317 preprocessed output, but still do -dM etc. as software
318 depends on this. Preprocessed output does occur if -MD, -MMD
319 or environment var dependency generation is used. */
320 cpp_opts->deps.style = (code == OPT_M ? DEPS_SYSTEM: DEPS_USER);
322 cpp_opts->inhibit_warnings = 1;
327 cpp_opts->deps.style = (code == OPT_MD ? DEPS_SYSTEM: DEPS_USER);
338 cpp_opts->deps.missing_files = true;
343 cpp_opts->deps.phony_targets = true;
349 defer_opt (code, arg);
353 flag_no_line_commands = 1;
356 case OPT_fworking_directory:
357 flag_working_directory = value;
361 defer_opt (code, arg);
367 set_Wimplicit (value);
368 warn_char_subscripts = value;
369 warn_missing_braces = value;
370 warn_parentheses = value;
371 warn_return_type = value;
372 warn_sequence_point = value; /* Was C only. */
373 if (c_dialect_cxx ())
374 warn_sign_compare = value;
376 warn_strict_aliasing = value;
378 /* Only warn about unknown pragmas that are not in system
380 warn_unknown_pragmas = value;
382 /* We save the value of warn_uninitialized, since if they put
383 -Wuninitialized on the command line, we need to generate a
384 warning about not using it without also specifying -O. */
385 if (warn_uninitialized != 1)
386 warn_uninitialized = (value ? 2 : 0);
388 if (!c_dialect_cxx ())
389 /* We set this to 2 here, but 1 in -Wmain, so -ffreestanding
390 can turn it off only if it's not explicit. */
391 warn_main = value * 2;
394 /* C++-specific warnings. */
395 warn_nonvdtor = value;
396 warn_reorder = value;
397 warn_nontemplate_friend = value;
400 cpp_opts->warn_trigraphs = value;
401 cpp_opts->warn_comments = value;
402 cpp_opts->warn_num_sign_change = value;
403 cpp_opts->warn_multichar = value; /* Was C++ only. */
408 cpp_opts->warn_comments = value;
411 case OPT_Wdeprecated:
412 cpp_opts->warn_deprecated = value;
415 case OPT_Wdiv_by_zero:
416 warn_div_by_zero = value;
419 case OPT_Wendif_labels:
420 cpp_opts->warn_endif_labels = value;
424 cpp_opts->warnings_are_errors = value;
427 case OPT_Werror_implicit_function_declaration:
428 mesg_implicit_function_declaration = 2;
436 set_Wformat (atoi (arg));
440 set_Wimplicit (value);
444 /* Silently ignore for now. */
447 case OPT_Winvalid_pch:
448 cpp_opts->warn_invalid_pch = value;
458 case OPT_Wmissing_include_dirs:
459 cpp_opts->warn_missing_include_dirs = value;
463 cpp_opts->warn_multichar = value;
466 case OPT_Wreturn_type:
467 warn_return_type = value;
470 case OPT_Wsystem_headers:
471 cpp_opts->warn_system_headers = value;
474 case OPT_Wtraditional:
475 cpp_opts->warn_traditional = value;
479 cpp_opts->warn_trigraphs = value;
483 cpp_opts->warn_undef = value;
486 case OPT_Wunknown_pragmas:
487 /* Set to greater than 1, so that even unknown pragmas in
488 system headers will be warned about. */
489 warn_unknown_pragmas = value * 2;
492 case OPT_Wunused_macros:
493 warn_unused_macros = value;
496 case OPT_Wvariadic_macros:
497 warn_variadic_macros = value;
500 case OPT_Wwrite_strings:
501 if (!c_dialect_cxx ())
502 flag_const_strings = value;
504 warn_write_strings = value;
508 if (!c_dialect_cxx ())
509 set_std_c89 (false, true);
511 set_std_cxx98 (true);
518 case OPT_fcond_mismatch:
519 if (!c_dialect_cxx ())
521 flag_cond_mismatch = value;
526 case OPT_fall_virtual:
527 case OPT_falt_external_templates:
528 case OPT_fenum_int_equiv:
529 case OPT_fexternal_templates:
530 case OPT_fguiding_decls:
532 case OPT_fhuge_objects:
534 case OPT_fname_mangling_version_:
536 case OPT_fnonnull_objects:
538 case OPT_fstrict_prototype:
539 case OPT_fthis_is_variable:
540 case OPT_fvtable_thunks:
543 warning ("switch \"%s\" is no longer supported", option->opt_text);
546 case OPT_faccess_control:
547 flag_access_control = value;
551 flag_no_asm = !value;
555 flag_no_builtin = !value;
562 disable_builtin_function (arg);
565 case OPT_fdollars_in_identifiers:
566 cpp_opts->dollars_in_ident = value;
569 case OPT_ffreestanding:
571 /* Fall through.... */
574 flag_no_builtin = !value;
575 /* warn_main will be 2 if set by -Wall, 1 if set by -Wmain */
576 if (!value && warn_main == 2)
580 case OPT_fshort_double:
581 flag_short_double = value;
584 case OPT_fshort_enums:
585 flag_short_enums = value;
588 case OPT_fshort_wchar:
589 flag_short_wchar = value;
592 case OPT_fsigned_bitfields:
593 flag_signed_bitfields = value;
594 explicit_flag_signed_bitfields = 1;
597 case OPT_fsigned_char:
598 flag_signed_char = value;
601 case OPT_funsigned_bitfields:
602 flag_signed_bitfields = !value;
603 explicit_flag_signed_bitfields = 1;
606 case OPT_funsigned_char:
607 flag_signed_char = !value;
611 flag_check_new = value;
614 case OPT_fconserve_space:
615 flag_conserve_space = value;
618 case OPT_fconst_strings:
619 flag_const_strings = value;
622 case OPT_fconstant_string_class_:
623 constant_string_class_name = arg;
626 case OPT_fdefault_inline:
627 flag_default_inline = value;
630 case OPT_felide_constructors:
631 flag_elide_constructors = value;
634 case OPT_fenforce_eh_specs:
635 flag_enforce_eh_specs = value;
638 case OPT_ffixed_form:
639 case OPT_ffixed_line_length_:
640 /* Fortran front end options ignored when preprocessing only. */
641 if (!flag_preprocess_only)
646 flag_new_for_scope = value;
649 case OPT_fgnu_keywords:
650 flag_no_gnu_keywords = !value;
653 case OPT_fgnu_runtime:
654 flag_next_runtime = !value;
657 case OPT_fhandle_exceptions:
658 warning ("-fhandle-exceptions has been renamed -fexceptions (and is now on by default)");
659 flag_exceptions = value;
662 case OPT_fimplement_inlines:
663 flag_implement_inlines = value;
666 case OPT_fimplicit_inline_templates:
667 flag_implicit_inline_templates = value;
670 case OPT_fimplicit_templates:
671 flag_implicit_templates = value;
674 case OPT_fms_extensions:
675 flag_ms_extensions = value;
678 case OPT_fnext_runtime:
679 flag_next_runtime = value;
682 case OPT_fnil_receivers:
683 flag_nil_receivers = value;
686 case OPT_fnonansi_builtins:
687 flag_no_nonansi_builtin = !value;
690 case OPT_fobjc_exceptions:
691 flag_objc_exceptions = value;
694 case OPT_fobjc_sjlj_exceptions:
695 flag_objc_sjlj_exceptions = value;
698 case OPT_foperator_names:
699 cpp_opts->operator_names = value;
702 case OPT_foptional_diags:
703 flag_optional_diags = value;
707 cpp_opts->restore_pch_deps = value;
710 case OPT_fpch_preprocess:
711 flag_pch_preprocess = value;
714 case OPT_fpermissive:
715 flag_permissive = value;
718 case OPT_fpreprocessed:
719 cpp_opts->preprocessed = value;
722 case OPT_freplace_objc_classes:
723 flag_replace_objc_classes = value;
727 flag_use_repository = value;
729 flag_implicit_templates = 0;
736 case OPT_fshow_column:
737 cpp_opts->show_column = value;
741 flag_detailed_statistics = value;
745 /* It is documented that we silently ignore silly values. */
746 if (value >= 1 && value <= 100)
747 cpp_opts->tabstop = value;
750 case OPT_fexec_charset_:
751 cpp_opts->narrow_charset = arg;
754 case OPT_fwide_exec_charset_:
755 cpp_opts->wide_charset = arg;
758 case OPT_finput_charset_:
759 cpp_opts->input_charset = arg;
762 case OPT_ftemplate_depth_:
763 max_tinst_depth = value;
766 case OPT_fuse_cxa_atexit:
767 flag_use_cxa_atexit = value;
775 flag_zero_link = value;
779 flag_gen_declaration = 1;
783 add_path (xstrdup (arg), AFTER, 0, true);
788 defer_opt (code, arg);
796 add_path (xstrdup (arg), QUOTE, 0, true);
804 add_path (xstrdup (arg), SYSTEM, 0, true);
807 case OPT_iwithprefix:
808 add_prefixed_path (arg, SYSTEM);
811 case OPT_iwithprefixbefore:
812 add_prefixed_path (arg, BRACKET);
816 cpp_set_lang (parse_in, CLK_ASM);
817 cpp_opts->dollars_in_ident = false;
836 error ("output filename specified twice");
839 /* We need to handle the -pedantic switches here, rather than in
840 c_common_post_options, so that a subsequent -Wno-endif-labels
841 is not overridden. */
842 case OPT_pedantic_errors:
843 cpp_opts->pedantic_errors = 1;
846 cpp_opts->pedantic = 1;
847 cpp_opts->warn_endif_labels = 1;
850 case OPT_print_objc_runtime_info:
851 print_struct_values = 1;
859 case OPT_std_gnu__98:
860 set_std_cxx98 (code == OPT_std_c__98 /* ISO */);
864 case OPT_std_iso9899_1990:
865 case OPT_std_iso9899_199409:
866 set_std_c89 (code == OPT_std_iso9899_199409 /* c94 */, true /* ISO */);
870 set_std_c89 (false /* c94 */, false /* ISO */);
875 case OPT_std_iso9899_1999:
876 case OPT_std_iso9899_199x:
877 set_std_c99 (true /* ISO */);
882 set_std_c99 (false /* ISO */);
886 cpp_opts->trigraphs = 1;
889 case OPT_traditional_cpp:
890 cpp_opts->traditional = 1;
898 cpp_opts->inhibit_warnings = 1;
909 /* Post-switch processing. */
911 c_common_post_options (const char **pfilename)
913 struct cpp_callbacks *cb;
915 /* Canonicalize the input and output filenames. */
916 if (in_fnames == NULL)
918 in_fnames = xmalloc (sizeof (in_fnames[0]));
921 else if (strcmp (in_fnames[0], "-") == 0)
924 if (out_fname == NULL || !strcmp (out_fname, "-"))
927 if (cpp_opts->deps.style == DEPS_NONE)
928 check_deps_environment_vars ();
930 handle_deferred_opts ();
932 sanitize_cpp_opts ();
934 register_include_chains (parse_in, sysroot, iprefix,
935 std_inc, std_cxx_inc && c_dialect_cxx (), verbose);
937 flag_inline_trees = 1;
939 /* Use tree inlining. */
942 if (flag_inline_functions)
944 flag_inline_trees = 2;
945 flag_inline_functions = 0;
948 /* Default to ObjC sjlj exception handling if NeXT runtime. */
949 if (flag_objc_sjlj_exceptions < 0)
950 flag_objc_sjlj_exceptions = flag_next_runtime;
951 if (flag_objc_exceptions && !flag_objc_sjlj_exceptions)
954 /* -Wextra implies -Wsign-compare, but not if explicitly
956 if (warn_sign_compare == -1)
957 warn_sign_compare = extra_warnings;
959 /* Special format checking options don't work without -Wformat; warn if
961 if (warn_format_y2k && !warn_format)
962 warning ("-Wformat-y2k ignored without -Wformat");
963 if (warn_format_extra_args && !warn_format)
964 warning ("-Wformat-extra-args ignored without -Wformat");
965 if (warn_format_zero_length && !warn_format)
966 warning ("-Wformat-zero-length ignored without -Wformat");
967 if (warn_format_nonliteral && !warn_format)
968 warning ("-Wformat-nonliteral ignored without -Wformat");
969 if (warn_format_security && !warn_format)
970 warning ("-Wformat-security ignored without -Wformat");
971 if (warn_missing_format_attribute && !warn_format)
972 warning ("-Wmissing-format-attribute ignored without -Wformat");
974 if (flag_preprocess_only)
976 /* Open the output now. We must do so even if flag_no_output is
977 on, because there may be other output than from the actual
978 preprocessing (e.g. from -dM). */
979 if (out_fname[0] == '\0')
982 out_stream = fopen (out_fname, "w");
984 if (out_stream == NULL)
986 fatal_error ("opening output file %s: %m", out_fname);
990 if (num_in_fnames > 1)
991 error ("too many filenames given. Type %s --help for usage",
994 init_pp_output (out_stream);
1000 /* Yuk. WTF is this? I do know ObjC relies on it somewhere. */
1004 cb = cpp_get_callbacks (parse_in);
1005 cb->file_change = cb_file_change;
1006 cb->dir_change = cb_dir_change;
1007 cpp_post_options (parse_in);
1009 saved_lineno = input_line;
1012 /* If an error has occurred in cpplib, note it so we fail
1014 errorcount += cpp_errors (parse_in);
1016 *pfilename = this_input_filename
1017 = cpp_read_main_file (parse_in, in_fnames[0]);
1018 /* Don't do any compilation or preprocessing if there is no input file. */
1019 if (this_input_filename == NULL)
1025 if (flag_working_directory
1026 && flag_preprocess_only && ! flag_no_line_commands)
1027 pp_dir_change (parse_in, get_src_pwd ());
1029 return flag_preprocess_only;
1032 /* Front end initialization common to C, ObjC and C++. */
1034 c_common_init (void)
1036 input_line = saved_lineno;
1038 /* Set up preprocessor arithmetic. Must be done after call to
1039 c_common_nodes_and_builtins for type nodes to be good. */
1040 cpp_opts->precision = TYPE_PRECISION (intmax_type_node);
1041 cpp_opts->char_precision = TYPE_PRECISION (char_type_node);
1042 cpp_opts->int_precision = TYPE_PRECISION (integer_type_node);
1043 cpp_opts->wchar_precision = TYPE_PRECISION (wchar_type_node);
1044 cpp_opts->unsigned_wchar = TYPE_UNSIGNED (wchar_type_node);
1045 cpp_opts->bytes_big_endian = BYTES_BIG_ENDIAN;
1047 /* This can't happen until after wchar_precision and bytes_big_endian
1049 cpp_init_iconv (parse_in);
1051 if (flag_preprocess_only)
1054 preprocess_file (parse_in);
1058 /* Has to wait until now so that cpplib has its hash table. */
1064 /* Initialize the integrated preprocessor after debug output has been
1065 initialized; loop over each input file. */
1067 c_common_parse_file (int set_yydebug)
1070 yydebug = set_yydebug;
1073 warning ("YYDEBUG not defined");
1076 if (num_in_fnames > 1)
1077 fatal_error ("sorry, inter-module analysis temporarily out of commission");
1087 /* Common finish hook for the C, ObjC and C++ front ends. */
1089 c_common_finish (void)
1091 FILE *deps_stream = NULL;
1093 if (cpp_opts->deps.style != DEPS_NONE)
1095 /* If -M or -MM was seen without -MF, default output to the
1098 deps_stream = out_stream;
1101 deps_stream = fopen (deps_file, deps_append ? "a": "w");
1103 fatal_error ("opening dependency file %s: %m", deps_file);
1107 /* For performance, avoid tearing down cpplib's internal structures
1108 with cpp_destroy (). */
1109 errorcount += cpp_finish (parse_in, deps_stream);
1111 if (deps_stream && deps_stream != out_stream
1112 && (ferror (deps_stream) || fclose (deps_stream)))
1113 fatal_error ("closing dependency file %s: %m", deps_file);
1115 if (out_stream && (ferror (out_stream) || fclose (out_stream)))
1116 fatal_error ("when writing output to %s: %m", out_fname);
1119 /* Either of two environment variables can specify output of
1120 dependencies. Their value is either "OUTPUT_FILE" or "OUTPUT_FILE
1121 DEPS_TARGET", where OUTPUT_FILE is the file to write deps info to
1122 and DEPS_TARGET is the target to mention in the deps. They also
1123 result in dependency information being appended to the output file
1124 rather than overwriting it, and like Sun's compiler
1125 SUNPRO_DEPENDENCIES suppresses the dependency on the main file. */
1127 check_deps_environment_vars (void)
1131 GET_ENVIRONMENT (spec, "DEPENDENCIES_OUTPUT");
1133 cpp_opts->deps.style = DEPS_USER;
1136 GET_ENVIRONMENT (spec, "SUNPRO_DEPENDENCIES");
1139 cpp_opts->deps.style = DEPS_SYSTEM;
1140 cpp_opts->deps.ignore_main_file = true;
1146 /* Find the space before the DEPS_TARGET, if there is one. */
1147 char *s = strchr (spec, ' ');
1150 /* Let the caller perform MAKE quoting. */
1151 defer_opt (OPT_MT, s + 1);
1155 /* Command line -MF overrides environment variables and default. */
1163 /* Handle deferred command line switches. */
1165 handle_deferred_opts (void)
1170 /* Avoid allocating the deps buffer if we don't need it.
1171 (This flag may be true without there having been -MT or -MQ
1172 options, but we'll still need the deps buffer.) */
1176 deps = cpp_get_deps (parse_in);
1178 for (i = 0; i < deferred_count; i++)
1180 struct deferred_opt *opt = &deferred_opts[i];
1182 if (opt->code == OPT_MT || opt->code == OPT_MQ)
1183 deps_add_target (deps, opt->arg, opt->code == OPT_MQ);
1187 /* These settings are appropriate for GCC, but not necessarily so for
1188 cpplib as a library. */
1190 sanitize_cpp_opts (void)
1192 /* If we don't know what style of dependencies to output, complain
1193 if any other dependency switches have been given. */
1194 if (deps_seen && cpp_opts->deps.style == DEPS_NONE)
1195 error ("to generate dependencies you must specify either -M or -MM");
1197 /* -dM and dependencies suppress normal output; do it here so that
1198 the last -d[MDN] switch overrides earlier ones. */
1199 if (flag_dump_macros == 'M')
1202 /* Disable -dD, -dN and -dI if normal output is suppressed. Allow
1203 -dM since at least glibc relies on -M -dM to work. */
1206 if (flag_dump_macros != 'M')
1207 flag_dump_macros = 0;
1208 flag_dump_includes = 0;
1211 cpp_opts->unsigned_char = !flag_signed_char;
1212 cpp_opts->stdc_0_in_system_headers = STDC_0_IN_SYSTEM_HEADERS;
1214 /* We want -Wno-long-long to override -pedantic -std=non-c99
1215 and/or -Wtraditional, whatever the ordering. */
1216 cpp_opts->warn_long_long
1217 = warn_long_long && ((!flag_isoc99 && pedantic) || warn_traditional);
1219 /* Similarly with -Wno-variadic-macros. No check for c99 here, since
1220 this also turns off warnings about GCCs extension. */
1221 cpp_opts->warn_variadic_macros
1222 = warn_variadic_macros && (pedantic || warn_traditional);
1224 /* If we're generating preprocessor output, emit current directory
1225 if explicitly requested or if debugging information is enabled.
1226 ??? Maybe we should only do it for debugging formats that
1227 actually output the current directory? */
1228 if (flag_working_directory == -1)
1229 flag_working_directory = (debug_info_level != DINFO_LEVEL_NONE);
1232 /* Add include path with a prefix at the front of its name. */
1234 add_prefixed_path (const char *suffix, size_t chain)
1238 size_t prefix_len, suffix_len;
1240 suffix_len = strlen (suffix);
1241 prefix = iprefix ? iprefix : cpp_GCC_INCLUDE_DIR;
1242 prefix_len = iprefix ? strlen (iprefix) : cpp_GCC_INCLUDE_DIR_len;
1244 path = xmalloc (prefix_len + suffix_len + 1);
1245 memcpy (path, prefix, prefix_len);
1246 memcpy (path + prefix_len, suffix, suffix_len);
1247 path[prefix_len + suffix_len] = '\0';
1249 add_path (path, chain, 0, false);
1252 /* Handle -D, -U, -A, -imacros, and the first -include. */
1254 finish_options (void)
1256 if (!cpp_opts->preprocessed)
1260 cpp_change_file (parse_in, LC_RENAME, _("<built-in>"));
1261 cpp_init_builtins (parse_in, flag_hosted);
1262 c_cpp_builtins (parse_in);
1264 /* We're about to send user input to cpplib, so make it warn for
1265 things that we previously (when we sent it internal definitions)
1266 told it to not warn.
1268 C99 permits implementation-defined characters in identifiers.
1269 The documented meaning of -std= is to turn off extensions that
1270 conflict with the specified standard, and since a strictly
1271 conforming program cannot contain a '$', we do not condition
1272 their acceptance on the -std= setting. */
1273 cpp_opts->warn_dollars = (cpp_opts->pedantic && !cpp_opts->c99);
1275 cpp_change_file (parse_in, LC_RENAME, _("<command line>"));
1276 for (i = 0; i < deferred_count; i++)
1278 struct deferred_opt *opt = &deferred_opts[i];
1280 if (opt->code == OPT_D)
1281 cpp_define (parse_in, opt->arg);
1282 else if (opt->code == OPT_U)
1283 cpp_undef (parse_in, opt->arg);
1284 else if (opt->code == OPT_A)
1286 if (opt->arg[0] == '-')
1287 cpp_unassert (parse_in, opt->arg + 1);
1289 cpp_assert (parse_in, opt->arg);
1293 /* Handle -imacros after -D and -U. */
1294 for (i = 0; i < deferred_count; i++)
1296 struct deferred_opt *opt = &deferred_opts[i];
1298 if (opt->code == OPT_imacros
1299 && cpp_push_include (parse_in, opt->arg))
1301 /* Disable push_command_line_include callback for now. */
1302 include_cursor = deferred_count + 1;
1303 cpp_scan_nooutput (parse_in);
1309 push_command_line_include ();
1312 /* Give CPP the next file given by -include, if any. */
1314 push_command_line_include (void)
1316 while (include_cursor < deferred_count)
1318 struct deferred_opt *opt = &deferred_opts[include_cursor++];
1320 if (! cpp_opts->preprocessed && opt->code == OPT_include
1321 && cpp_push_include (parse_in, opt->arg))
1325 if (include_cursor == deferred_count)
1328 /* -Wunused-macros should only warn about macros defined hereafter. */
1329 cpp_opts->warn_unused_macros = warn_unused_macros;
1330 /* Restore the line map from <command line>. */
1331 if (! cpp_opts->preprocessed)
1332 cpp_change_file (parse_in, LC_RENAME, main_input_filename);
1334 /* Set this here so the client can change the option if it wishes,
1335 and after stacking the main file so we don't trace the main file. */
1336 line_table.trace_includes = cpp_opts->print_include_names;
1340 /* File change callback. Has to handle -include files. */
1342 cb_file_change (cpp_reader *pfile ATTRIBUTE_UNUSED,
1343 const struct line_map *new_map)
1345 if (flag_preprocess_only)
1346 pp_file_change (new_map);
1348 fe_file_change (new_map);
1350 if (new_map == 0 || (new_map->reason == LC_LEAVE && MAIN_FILE_P (new_map)))
1351 push_command_line_include ();
1355 cb_dir_change (cpp_reader *pfile ATTRIBUTE_UNUSED, const char *dir)
1357 if (! set_src_pwd (dir))
1358 warning ("too late for # directive to set debug directory");
1361 /* Set the C 89 standard (with 1994 amendments if C94, without GNU
1362 extensions if ISO). There is no concept of gnu94. */
1364 set_std_c89 (int c94, int iso)
1366 cpp_set_lang (parse_in, c94 ? CLK_STDC94: iso ? CLK_STDC89: CLK_GNUC89);
1369 flag_no_gnu_keywords = iso;
1370 flag_no_nonansi_builtin = iso;
1375 /* Set the C 99 standard (without GNU extensions if ISO). */
1377 set_std_c99 (int iso)
1379 cpp_set_lang (parse_in, iso ? CLK_STDC99: CLK_GNUC99);
1381 flag_no_nonansi_builtin = iso;
1387 /* Set the C++ 98 standard (without GNU extensions if ISO). */
1389 set_std_cxx98 (int iso)
1391 cpp_set_lang (parse_in, iso ? CLK_CXX98: CLK_GNUCXX);
1392 flag_no_gnu_keywords = iso;
1393 flag_no_nonansi_builtin = iso;
1397 /* Handle setting implicit to ON. */
1399 set_Wimplicit (int on)
1402 warn_implicit_int = on;
1405 if (mesg_implicit_function_declaration != 2)
1406 mesg_implicit_function_declaration = 1;
1409 mesg_implicit_function_declaration = 0;
1412 /* Args to -d specify what to dump. Silently ignore
1413 unrecognized options; they may be aimed at toplev.c. */
1415 handle_OPT_d (const char *arg)
1419 while ((c = *arg++) != '\0')
1422 case 'M': /* Dump macros only. */
1423 case 'N': /* Dump names. */
1424 case 'D': /* Dump definitions. */
1425 flag_dump_macros = c;
1429 flag_dump_includes = 1;