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 static void set_Wimplicit (int);
104 static void handle_OPT_d (const char *);
105 static void set_std_cxx98 (int);
106 static void set_std_c89 (int, int);
107 static void set_std_c99 (int);
108 static void check_deps_environment_vars (void);
109 static void handle_deferred_opts (void);
110 static void sanitize_cpp_opts (void);
111 static void add_prefixed_path (const char *, size_t);
112 static void push_command_line_include (void);
113 static void cb_file_change (cpp_reader *, const struct line_map *);
114 static void cb_dir_change (cpp_reader *, const char *);
115 static void finish_options (void);
117 #ifndef STDC_0_IN_SYSTEM_HEADERS
118 #define STDC_0_IN_SYSTEM_HEADERS 0
121 /* Holds switches parsed by c_common_handle_option (), but whose
122 handling is deferred to c_common_post_options (). */
123 static void defer_opt (enum opt_code, const char *);
124 static struct deferred_opt
130 /* Complain that switch CODE expects an argument but none was
131 provided. OPT was the command-line option. Return FALSE to get
132 the default message in opts.c, TRUE if we provide a specialized
135 c_common_missing_argument (const char *opt, size_t code)
140 /* Pick up the default message. */
143 case OPT_fconstant_string_class_:
144 error ("no class name specified with %qs", opt);
148 error ("assertion missing after %qs", opt);
153 error ("macro name missing after %qs", opt);
162 error ("missing path after %qs", opt);
171 error ("missing filename after %qs", opt);
176 error ("missing makefile target after %qs", opt);
183 /* Defer option CODE with argument ARG. */
185 defer_opt (enum opt_code code, const char *arg)
187 deferred_opts[deferred_count].code = code;
188 deferred_opts[deferred_count].arg = arg;
192 /* Common initialization before parsing options. */
194 c_common_init_options (unsigned int argc, const char **argv)
196 static const unsigned int lang_flags[] = {CL_C, CL_ObjC, CL_CXX, CL_ObjCXX};
197 unsigned int i, result;
199 /* This is conditionalized only because that is the way the front
200 ends used to do it. Maybe this should be unconditional? */
201 if (c_dialect_cxx ())
203 /* By default wrap lines at 80 characters. Is getenv
204 ("COLUMNS") preferable? */
205 diagnostic_line_cutoff (global_dc) = 80;
206 /* By default, emit location information once for every
207 diagnostic message. */
208 diagnostic_prefixing_rule (global_dc) = DIAGNOSTICS_SHOW_PREFIX_ONCE;
211 parse_in = cpp_create_reader (c_dialect_cxx () ? CLK_GNUCXX: CLK_GNUC89,
212 ident_hash, &line_table);
214 cpp_opts = cpp_get_options (parse_in);
215 cpp_opts->dollars_in_ident = DOLLARS_IN_IDENTIFIERS;
216 cpp_opts->objc = c_dialect_objc ();
218 /* Reset to avoid warnings on internal definitions. We set it just
219 before passing on command-line options to cpplib. */
220 cpp_opts->warn_dollars = 0;
222 flag_const_strings = c_dialect_cxx ();
223 flag_exceptions = c_dialect_cxx ();
224 warn_pointer_arith = c_dialect_cxx ();
226 deferred_opts = XNEWVEC (struct deferred_opt, argc);
228 result = lang_flags[c_language];
230 if (c_language == clk_c)
232 /* If preprocessing assembly language, accept any of the C-family
233 front end options since the driver may pass them through. */
234 for (i = 1; i < argc; i++)
235 if (! strcmp (argv[i], "-lang-asm"))
237 result |= CL_C | CL_ObjC | CL_CXX | CL_ObjCXX;
245 /* Handle switch SCODE with argument ARG. VALUE is true, unless no-
246 form of an -f or -W option was given. Returns 0 if the switch was
247 invalid, a negative number to prevent language-independent
248 processing in toplev.c (a hack necessary for the short-term). */
250 c_common_handle_option (size_t scode, const char *arg, int value)
252 const struct cl_option *option = &cl_options[scode];
253 enum opt_code code = (enum opt_code) scode;
259 if (cl_options[code].flags & (CL_C | CL_CXX | CL_ObjC | CL_ObjCXX))
264 case OPT__output_pch_:
269 defer_opt (code, arg);
273 cpp_opts->discard_comments = 0;
277 cpp_opts->discard_comments = 0;
278 cpp_opts->discard_comments_in_macro_exp = 0;
282 defer_opt (code, arg);
286 flag_preprocess_only = 1;
290 cpp_opts->print_include_names = 1;
294 TARGET_OPTF (xstrdup (arg));
298 if (strcmp (arg, "-"))
299 add_path (xstrdup (arg), BRACKET, 0, true);
302 if (quote_chain_split)
303 error ("-I- specified twice");
304 quote_chain_split = true;
305 split_quote_chain ();
306 inform ("obsolete option -I- used, please use -iquote instead");
312 /* When doing dependencies with -M or -MM, suppress normal
313 preprocessed output, but still do -dM etc. as software
314 depends on this. Preprocessed output does occur if -MD, -MMD
315 or environment var dependency generation is used. */
316 cpp_opts->deps.style = (code == OPT_M ? DEPS_SYSTEM: DEPS_USER);
318 cpp_opts->inhibit_warnings = 1;
323 cpp_opts->deps.style = (code == OPT_MD ? DEPS_SYSTEM: DEPS_USER);
334 cpp_opts->deps.missing_files = true;
339 cpp_opts->deps.phony_targets = true;
345 defer_opt (code, arg);
349 flag_no_line_commands = 1;
352 case OPT_fworking_directory:
353 flag_working_directory = value;
357 defer_opt (code, arg);
363 set_Wimplicit (value);
364 warn_char_subscripts = value;
365 warn_missing_braces = value;
366 warn_parentheses = value;
367 warn_return_type = value;
368 warn_sequence_point = value; /* Was C only. */
369 if (c_dialect_cxx ())
370 warn_sign_compare = value;
372 warn_strict_aliasing = value;
374 /* Only warn about unknown pragmas that are not in system
376 warn_unknown_pragmas = value;
378 /* We save the value of warn_uninitialized, since if they put
379 -Wuninitialized on the command line, we need to generate a
380 warning about not using it without also specifying -O. */
381 if (warn_uninitialized != 1)
382 warn_uninitialized = (value ? 2 : 0);
384 if (!c_dialect_cxx ())
385 /* We set this to 2 here, but 1 in -Wmain, so -ffreestanding
386 can turn it off only if it's not explicit. */
387 warn_main = value * 2;
390 /* C++-specific warnings. */
391 warn_nonvdtor = value;
392 warn_reorder = value;
393 warn_nontemplate_friend = value;
396 cpp_opts->warn_trigraphs = value;
397 cpp_opts->warn_comments = value;
398 cpp_opts->warn_num_sign_change = value;
399 cpp_opts->warn_multichar = value; /* Was C++ only. */
404 cpp_opts->warn_comments = value;
407 case OPT_Wdeprecated:
408 cpp_opts->warn_deprecated = value;
411 case OPT_Wdiv_by_zero:
412 warn_div_by_zero = value;
415 case OPT_Wendif_labels:
416 cpp_opts->warn_endif_labels = value;
420 cpp_opts->warnings_are_errors = value;
421 global_dc->warning_as_error_requested = value;
424 case OPT_Werror_implicit_function_declaration:
425 mesg_implicit_function_declaration = 2;
433 set_Wformat (atoi (arg));
437 set_Wimplicit (value);
441 /* Silently ignore for now. */
444 case OPT_Winvalid_pch:
445 cpp_opts->warn_invalid_pch = value;
455 case OPT_Wmissing_include_dirs:
456 cpp_opts->warn_missing_include_dirs = value;
460 cpp_opts->warn_multichar = value;
463 case OPT_Wreturn_type:
464 warn_return_type = value;
467 case OPT_Wsystem_headers:
468 cpp_opts->warn_system_headers = value;
471 case OPT_Wtraditional:
472 cpp_opts->warn_traditional = value;
476 cpp_opts->warn_trigraphs = value;
480 cpp_opts->warn_undef = value;
483 case OPT_Wunknown_pragmas:
484 /* Set to greater than 1, so that even unknown pragmas in
485 system headers will be warned about. */
486 warn_unknown_pragmas = value * 2;
489 case OPT_Wunused_macros:
490 warn_unused_macros = value;
493 case OPT_Wvariadic_macros:
494 warn_variadic_macros = value;
497 case OPT_Wwrite_strings:
498 if (!c_dialect_cxx ())
499 flag_const_strings = value;
501 warn_write_strings = value;
505 if (!c_dialect_cxx ())
506 set_std_c89 (false, true);
508 set_std_cxx98 (true);
515 case OPT_fcond_mismatch:
516 if (!c_dialect_cxx ())
518 flag_cond_mismatch = value;
523 case OPT_fall_virtual:
524 case OPT_falt_external_templates:
525 case OPT_fenum_int_equiv:
526 case OPT_fexternal_templates:
527 case OPT_fguiding_decls:
529 case OPT_fhuge_objects:
531 case OPT_fname_mangling_version_:
533 case OPT_fnonnull_objects:
535 case OPT_fstrict_prototype:
536 case OPT_fthis_is_variable:
537 case OPT_fvtable_thunks:
540 warning ("switch %qs is no longer supported", option->opt_text);
543 case OPT_faccess_control:
544 flag_access_control = value;
548 flag_no_asm = !value;
552 flag_no_builtin = !value;
559 disable_builtin_function (arg);
562 case OPT_fdollars_in_identifiers:
563 cpp_opts->dollars_in_ident = value;
566 case OPT_ffreestanding:
568 /* Fall through.... */
571 flag_no_builtin = !value;
572 /* warn_main will be 2 if set by -Wall, 1 if set by -Wmain */
573 if (!value && warn_main == 2)
577 case OPT_fshort_double:
578 flag_short_double = value;
581 case OPT_fshort_enums:
582 flag_short_enums = value;
585 case OPT_fshort_wchar:
586 flag_short_wchar = value;
589 case OPT_fsigned_bitfields:
590 flag_signed_bitfields = value;
591 explicit_flag_signed_bitfields = 1;
594 case OPT_fsigned_char:
595 flag_signed_char = value;
598 case OPT_funsigned_bitfields:
599 flag_signed_bitfields = !value;
600 explicit_flag_signed_bitfields = 1;
603 case OPT_funsigned_char:
604 flag_signed_char = !value;
608 flag_check_new = value;
611 case OPT_fconserve_space:
612 flag_conserve_space = value;
615 case OPT_fconst_strings:
616 flag_const_strings = value;
619 case OPT_fconstant_string_class_:
620 constant_string_class_name = arg;
623 case OPT_fdefault_inline:
624 flag_default_inline = value;
627 case OPT_felide_constructors:
628 flag_elide_constructors = value;
631 case OPT_fenforce_eh_specs:
632 flag_enforce_eh_specs = value;
635 case OPT_ffixed_form:
636 case OPT_ffixed_line_length_:
637 /* Fortran front end options ignored when preprocessing only. */
638 if (!flag_preprocess_only)
643 flag_new_for_scope = value;
646 case OPT_fgnu_keywords:
647 flag_no_gnu_keywords = !value;
650 case OPT_fgnu_runtime:
651 flag_next_runtime = !value;
654 case OPT_fhandle_exceptions:
655 warning ("-fhandle-exceptions has been renamed -fexceptions (and is now on by default)");
656 flag_exceptions = value;
659 case OPT_fimplement_inlines:
660 flag_implement_inlines = value;
663 case OPT_fimplicit_inline_templates:
664 flag_implicit_inline_templates = value;
667 case OPT_fimplicit_templates:
668 flag_implicit_templates = value;
671 case OPT_fms_extensions:
672 flag_ms_extensions = value;
675 case OPT_fnext_runtime:
676 flag_next_runtime = value;
679 case OPT_fnil_receivers:
680 flag_nil_receivers = value;
683 case OPT_fnonansi_builtins:
684 flag_no_nonansi_builtin = !value;
687 case OPT_fobjc_exceptions:
688 flag_objc_exceptions = value;
691 case OPT_fobjc_sjlj_exceptions:
692 flag_objc_sjlj_exceptions = value;
695 case OPT_foperator_names:
696 cpp_opts->operator_names = value;
699 case OPT_foptional_diags:
700 flag_optional_diags = value;
704 cpp_opts->restore_pch_deps = value;
707 case OPT_fpch_preprocess:
708 flag_pch_preprocess = value;
711 case OPT_fpermissive:
712 flag_permissive = value;
715 case OPT_fpreprocessed:
716 cpp_opts->preprocessed = value;
719 case OPT_freplace_objc_classes:
720 flag_replace_objc_classes = value;
724 flag_use_repository = value;
726 flag_implicit_templates = 0;
733 case OPT_fshow_column:
734 cpp_opts->show_column = value;
738 flag_detailed_statistics = value;
742 /* It is documented that we silently ignore silly values. */
743 if (value >= 1 && value <= 100)
744 cpp_opts->tabstop = value;
747 case OPT_fexec_charset_:
748 cpp_opts->narrow_charset = arg;
751 case OPT_fwide_exec_charset_:
752 cpp_opts->wide_charset = arg;
755 case OPT_finput_charset_:
756 cpp_opts->input_charset = arg;
759 case OPT_ftemplate_depth_:
760 max_tinst_depth = value;
763 case OPT_fuse_cxa_atexit:
764 flag_use_cxa_atexit = value;
767 case OPT_fvisibility_inlines_hidden:
768 visibility_options.inlines_hidden = value;
775 case OPT_fthreadsafe_statics:
776 flag_threadsafe_statics = value;
780 flag_zero_link = value;
784 flag_gen_declaration = 1;
788 add_path (xstrdup (arg), AFTER, 0, true);
793 defer_opt (code, arg);
801 add_path (xstrdup (arg), QUOTE, 0, true);
809 add_path (xstrdup (arg), SYSTEM, 0, true);
812 case OPT_iwithprefix:
813 add_prefixed_path (arg, SYSTEM);
816 case OPT_iwithprefixbefore:
817 add_prefixed_path (arg, BRACKET);
821 cpp_set_lang (parse_in, CLK_ASM);
822 cpp_opts->dollars_in_ident = false;
841 error ("output filename specified twice");
844 /* We need to handle the -pedantic switches here, rather than in
845 c_common_post_options, so that a subsequent -Wno-endif-labels
846 is not overridden. */
847 case OPT_pedantic_errors:
848 cpp_opts->pedantic_errors = 1;
851 cpp_opts->pedantic = 1;
852 cpp_opts->warn_endif_labels = 1;
855 case OPT_print_objc_runtime_info:
856 print_struct_values = 1;
864 case OPT_std_gnu__98:
865 set_std_cxx98 (code == OPT_std_c__98 /* ISO */);
869 case OPT_std_iso9899_1990:
870 case OPT_std_iso9899_199409:
871 set_std_c89 (code == OPT_std_iso9899_199409 /* c94 */, true /* ISO */);
875 set_std_c89 (false /* c94 */, false /* ISO */);
880 case OPT_std_iso9899_1999:
881 case OPT_std_iso9899_199x:
882 set_std_c99 (true /* ISO */);
887 set_std_c99 (false /* ISO */);
891 cpp_opts->trigraphs = 1;
894 case OPT_traditional_cpp:
895 cpp_opts->traditional = 1;
903 cpp_opts->inhibit_warnings = 1;
914 /* Post-switch processing. */
916 c_common_post_options (const char **pfilename)
918 struct cpp_callbacks *cb;
920 /* Canonicalize the input and output filenames. */
921 if (in_fnames == NULL)
923 in_fnames = XNEWVEC (const char *, 1);
926 else if (strcmp (in_fnames[0], "-") == 0)
929 if (out_fname == NULL || !strcmp (out_fname, "-"))
932 if (cpp_opts->deps.style == DEPS_NONE)
933 check_deps_environment_vars ();
935 handle_deferred_opts ();
937 sanitize_cpp_opts ();
939 register_include_chains (parse_in, sysroot, iprefix,
940 std_inc, std_cxx_inc && c_dialect_cxx (), verbose);
942 flag_inline_trees = 1;
944 /* Use tree inlining. */
947 if (flag_inline_functions)
949 flag_inline_trees = 2;
950 flag_inline_functions = 0;
953 /* If we are given more than one input file, we must use
954 unit-at-a-time mode. */
955 if (num_in_fnames > 1)
956 flag_unit_at_a_time = 1;
958 /* Default to ObjC sjlj exception handling if NeXT runtime. */
959 if (flag_objc_sjlj_exceptions < 0)
960 flag_objc_sjlj_exceptions = flag_next_runtime;
961 if (flag_objc_exceptions && !flag_objc_sjlj_exceptions)
964 /* -Wextra implies -Wsign-compare and -Wmissing-field-initializers,
965 but not if explicitly overridden. */
966 if (warn_sign_compare == -1)
967 warn_sign_compare = extra_warnings;
968 if (warn_missing_field_initializers == -1)
969 warn_missing_field_initializers = extra_warnings;
971 /* Special format checking options don't work without -Wformat; warn if
973 if (warn_format_y2k && !warn_format)
974 warning ("-Wformat-y2k ignored without -Wformat");
975 if (warn_format_extra_args && !warn_format)
976 warning ("-Wformat-extra-args ignored without -Wformat");
977 if (warn_format_zero_length && !warn_format)
978 warning ("-Wformat-zero-length ignored without -Wformat");
979 if (warn_format_nonliteral && !warn_format)
980 warning ("-Wformat-nonliteral ignored without -Wformat");
981 if (warn_format_security && !warn_format)
982 warning ("-Wformat-security ignored without -Wformat");
983 if (warn_missing_format_attribute && !warn_format)
984 warning ("-Wmissing-format-attribute ignored without -Wformat");
986 if (flag_preprocess_only)
988 /* Open the output now. We must do so even if flag_no_output is
989 on, because there may be other output than from the actual
990 preprocessing (e.g. from -dM). */
991 if (out_fname[0] == '\0')
994 out_stream = fopen (out_fname, "w");
996 if (out_stream == NULL)
998 fatal_error ("opening output file %s: %m", out_fname);
1002 if (num_in_fnames > 1)
1003 error ("too many filenames given. Type %s --help for usage",
1006 init_pp_output (out_stream);
1012 /* Yuk. WTF is this? I do know ObjC relies on it somewhere. */
1013 input_location = UNKNOWN_LOCATION;
1016 cb = cpp_get_callbacks (parse_in);
1017 cb->file_change = cb_file_change;
1018 cb->dir_change = cb_dir_change;
1019 cpp_post_options (parse_in);
1021 input_location = UNKNOWN_LOCATION;
1023 /* If an error has occurred in cpplib, note it so we fail
1025 errorcount += cpp_errors (parse_in);
1027 *pfilename = this_input_filename
1028 = cpp_read_main_file (parse_in, in_fnames[0]);
1029 /* Don't do any compilation or preprocessing if there is no input file. */
1030 if (this_input_filename == NULL)
1036 if (flag_working_directory
1037 && flag_preprocess_only && !flag_no_line_commands)
1038 pp_dir_change (parse_in, get_src_pwd ());
1040 return flag_preprocess_only;
1043 /* Front end initialization common to C, ObjC and C++. */
1045 c_common_init (void)
1047 /* Set up preprocessor arithmetic. Must be done after call to
1048 c_common_nodes_and_builtins for type nodes to be good. */
1049 cpp_opts->precision = TYPE_PRECISION (intmax_type_node);
1050 cpp_opts->char_precision = TYPE_PRECISION (char_type_node);
1051 cpp_opts->int_precision = TYPE_PRECISION (integer_type_node);
1052 cpp_opts->wchar_precision = TYPE_PRECISION (wchar_type_node);
1053 cpp_opts->unsigned_wchar = TYPE_UNSIGNED (wchar_type_node);
1054 cpp_opts->bytes_big_endian = BYTES_BIG_ENDIAN;
1056 /* This can't happen until after wchar_precision and bytes_big_endian
1058 cpp_init_iconv (parse_in);
1060 if (flag_preprocess_only)
1063 preprocess_file (parse_in);
1067 /* Has to wait until now so that cpplib has its hash table. */
1073 /* Initialize the integrated preprocessor after debug output has been
1074 initialized; loop over each input file. */
1076 c_common_parse_file (int set_yydebug)
1080 /* Enable parser debugging, if requested and we can. If requested
1081 and we can't, notify the user. */
1083 yydebug = set_yydebug;
1086 warning ("YYDEBUG was not defined at build time, -dy ignored");
1099 if (++i >= num_in_fnames)
1101 cpp_undef_all (parse_in);
1103 = cpp_read_main_file (parse_in, in_fnames[i]);
1104 /* If an input file is missing, abandon further compilation.
1105 cpplib has issued a diagnostic. */
1106 if (!this_input_filename)
1111 /* Common finish hook for the C, ObjC and C++ front ends. */
1113 c_common_finish (void)
1115 FILE *deps_stream = NULL;
1117 if (cpp_opts->deps.style != DEPS_NONE)
1119 /* If -M or -MM was seen without -MF, default output to the
1122 deps_stream = out_stream;
1125 deps_stream = fopen (deps_file, deps_append ? "a": "w");
1127 fatal_error ("opening dependency file %s: %m", deps_file);
1131 /* For performance, avoid tearing down cpplib's internal structures
1132 with cpp_destroy (). */
1133 errorcount += cpp_finish (parse_in, deps_stream);
1135 if (deps_stream && deps_stream != out_stream
1136 && (ferror (deps_stream) || fclose (deps_stream)))
1137 fatal_error ("closing dependency file %s: %m", deps_file);
1139 if (out_stream && (ferror (out_stream) || fclose (out_stream)))
1140 fatal_error ("when writing output to %s: %m", out_fname);
1143 /* Either of two environment variables can specify output of
1144 dependencies. Their value is either "OUTPUT_FILE" or "OUTPUT_FILE
1145 DEPS_TARGET", where OUTPUT_FILE is the file to write deps info to
1146 and DEPS_TARGET is the target to mention in the deps. They also
1147 result in dependency information being appended to the output file
1148 rather than overwriting it, and like Sun's compiler
1149 SUNPRO_DEPENDENCIES suppresses the dependency on the main file. */
1151 check_deps_environment_vars (void)
1155 GET_ENVIRONMENT (spec, "DEPENDENCIES_OUTPUT");
1157 cpp_opts->deps.style = DEPS_USER;
1160 GET_ENVIRONMENT (spec, "SUNPRO_DEPENDENCIES");
1163 cpp_opts->deps.style = DEPS_SYSTEM;
1164 cpp_opts->deps.ignore_main_file = true;
1170 /* Find the space before the DEPS_TARGET, if there is one. */
1171 char *s = strchr (spec, ' ');
1174 /* Let the caller perform MAKE quoting. */
1175 defer_opt (OPT_MT, s + 1);
1179 /* Command line -MF overrides environment variables and default. */
1187 /* Handle deferred command line switches. */
1189 handle_deferred_opts (void)
1194 /* Avoid allocating the deps buffer if we don't need it.
1195 (This flag may be true without there having been -MT or -MQ
1196 options, but we'll still need the deps buffer.) */
1200 deps = cpp_get_deps (parse_in);
1202 for (i = 0; i < deferred_count; i++)
1204 struct deferred_opt *opt = &deferred_opts[i];
1206 if (opt->code == OPT_MT || opt->code == OPT_MQ)
1207 deps_add_target (deps, opt->arg, opt->code == OPT_MQ);
1211 /* These settings are appropriate for GCC, but not necessarily so for
1212 cpplib as a library. */
1214 sanitize_cpp_opts (void)
1216 /* If we don't know what style of dependencies to output, complain
1217 if any other dependency switches have been given. */
1218 if (deps_seen && cpp_opts->deps.style == DEPS_NONE)
1219 error ("to generate dependencies you must specify either -M or -MM");
1221 /* -dM and dependencies suppress normal output; do it here so that
1222 the last -d[MDN] switch overrides earlier ones. */
1223 if (flag_dump_macros == 'M')
1226 /* Disable -dD, -dN and -dI if normal output is suppressed. Allow
1227 -dM since at least glibc relies on -M -dM to work. */
1230 if (flag_dump_macros != 'M')
1231 flag_dump_macros = 0;
1232 flag_dump_includes = 0;
1235 cpp_opts->unsigned_char = !flag_signed_char;
1236 cpp_opts->stdc_0_in_system_headers = STDC_0_IN_SYSTEM_HEADERS;
1238 /* We want -Wno-long-long to override -pedantic -std=non-c99
1239 and/or -Wtraditional, whatever the ordering. */
1240 cpp_opts->warn_long_long
1241 = warn_long_long && ((!flag_isoc99 && pedantic) || warn_traditional);
1243 /* Similarly with -Wno-variadic-macros. No check for c99 here, since
1244 this also turns off warnings about GCCs extension. */
1245 cpp_opts->warn_variadic_macros
1246 = warn_variadic_macros && (pedantic || warn_traditional);
1248 /* If we're generating preprocessor output, emit current directory
1249 if explicitly requested or if debugging information is enabled.
1250 ??? Maybe we should only do it for debugging formats that
1251 actually output the current directory? */
1252 if (flag_working_directory == -1)
1253 flag_working_directory = (debug_info_level != DINFO_LEVEL_NONE);
1256 /* Add include path with a prefix at the front of its name. */
1258 add_prefixed_path (const char *suffix, size_t chain)
1262 size_t prefix_len, suffix_len;
1264 suffix_len = strlen (suffix);
1265 prefix = iprefix ? iprefix : cpp_GCC_INCLUDE_DIR;
1266 prefix_len = iprefix ? strlen (iprefix) : cpp_GCC_INCLUDE_DIR_len;
1268 path = (char *) xmalloc (prefix_len + suffix_len + 1);
1269 memcpy (path, prefix, prefix_len);
1270 memcpy (path + prefix_len, suffix, suffix_len);
1271 path[prefix_len + suffix_len] = '\0';
1273 add_path (path, chain, 0, false);
1276 /* Handle -D, -U, -A, -imacros, and the first -include. */
1278 finish_options (void)
1280 if (!cpp_opts->preprocessed)
1284 cpp_change_file (parse_in, LC_RENAME, _("<built-in>"));
1285 cpp_init_builtins (parse_in, flag_hosted);
1286 c_cpp_builtins (parse_in);
1288 /* We're about to send user input to cpplib, so make it warn for
1289 things that we previously (when we sent it internal definitions)
1290 told it to not warn.
1292 C99 permits implementation-defined characters in identifiers.
1293 The documented meaning of -std= is to turn off extensions that
1294 conflict with the specified standard, and since a strictly
1295 conforming program cannot contain a '$', we do not condition
1296 their acceptance on the -std= setting. */
1297 cpp_opts->warn_dollars = (cpp_opts->pedantic && !cpp_opts->c99);
1299 cpp_change_file (parse_in, LC_RENAME, _("<command line>"));
1300 for (i = 0; i < deferred_count; i++)
1302 struct deferred_opt *opt = &deferred_opts[i];
1304 if (opt->code == OPT_D)
1305 cpp_define (parse_in, opt->arg);
1306 else if (opt->code == OPT_U)
1307 cpp_undef (parse_in, opt->arg);
1308 else if (opt->code == OPT_A)
1310 if (opt->arg[0] == '-')
1311 cpp_unassert (parse_in, opt->arg + 1);
1313 cpp_assert (parse_in, opt->arg);
1317 /* Handle -imacros after -D and -U. */
1318 for (i = 0; i < deferred_count; i++)
1320 struct deferred_opt *opt = &deferred_opts[i];
1322 if (opt->code == OPT_imacros
1323 && cpp_push_include (parse_in, opt->arg))
1325 /* Disable push_command_line_include callback for now. */
1326 include_cursor = deferred_count + 1;
1327 cpp_scan_nooutput (parse_in);
1333 push_command_line_include ();
1336 /* Give CPP the next file given by -include, if any. */
1338 push_command_line_include (void)
1340 while (include_cursor < deferred_count)
1342 struct deferred_opt *opt = &deferred_opts[include_cursor++];
1344 if (!cpp_opts->preprocessed && opt->code == OPT_include
1345 && cpp_push_include (parse_in, opt->arg))
1349 if (include_cursor == deferred_count)
1352 /* -Wunused-macros should only warn about macros defined hereafter. */
1353 cpp_opts->warn_unused_macros = warn_unused_macros;
1354 /* Restore the line map from <command line>. */
1355 if (!cpp_opts->preprocessed)
1356 cpp_change_file (parse_in, LC_RENAME, main_input_filename);
1358 /* Set this here so the client can change the option if it wishes,
1359 and after stacking the main file so we don't trace the main file. */
1360 line_table.trace_includes = cpp_opts->print_include_names;
1364 /* File change callback. Has to handle -include files. */
1366 cb_file_change (cpp_reader * ARG_UNUSED (pfile),
1367 const struct line_map *new_map)
1369 if (flag_preprocess_only)
1370 pp_file_change (new_map);
1372 fe_file_change (new_map);
1374 if (new_map == 0 || (new_map->reason == LC_LEAVE && MAIN_FILE_P (new_map)))
1375 push_command_line_include ();
1379 cb_dir_change (cpp_reader * ARG_UNUSED (pfile), const char *dir)
1381 if (!set_src_pwd (dir))
1382 warning ("too late for # directive to set debug directory");
1385 /* Set the C 89 standard (with 1994 amendments if C94, without GNU
1386 extensions if ISO). There is no concept of gnu94. */
1388 set_std_c89 (int c94, int iso)
1390 cpp_set_lang (parse_in, c94 ? CLK_STDC94: iso ? CLK_STDC89: CLK_GNUC89);
1393 flag_no_gnu_keywords = iso;
1394 flag_no_nonansi_builtin = iso;
1399 /* Set the C 99 standard (without GNU extensions if ISO). */
1401 set_std_c99 (int iso)
1403 cpp_set_lang (parse_in, iso ? CLK_STDC99: CLK_GNUC99);
1405 flag_no_nonansi_builtin = iso;
1411 /* Set the C++ 98 standard (without GNU extensions if ISO). */
1413 set_std_cxx98 (int iso)
1415 cpp_set_lang (parse_in, iso ? CLK_CXX98: CLK_GNUCXX);
1416 flag_no_gnu_keywords = iso;
1417 flag_no_nonansi_builtin = iso;
1421 /* Handle setting implicit to ON. */
1423 set_Wimplicit (int on)
1426 warn_implicit_int = on;
1429 if (mesg_implicit_function_declaration != 2)
1430 mesg_implicit_function_declaration = 1;
1433 mesg_implicit_function_declaration = 0;
1436 /* Args to -d specify what to dump. Silently ignore
1437 unrecognized options; they may be aimed at toplev.c. */
1439 handle_OPT_d (const char *arg)
1443 while ((c = *arg++) != '\0')
1446 case 'M': /* Dump macros only. */
1447 case 'N': /* Dump names. */
1448 case 'D': /* Dump definitions. */
1449 flag_dump_macros = c;
1453 flag_dump_includes = 1;