1 /* C/ObjC/C++ command line option handling.
2 Copyright (C) 2002, 2003 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. */
41 #ifndef DOLLARS_IN_IDENTIFIERS
42 # define DOLLARS_IN_IDENTIFIERS true
45 #ifndef TARGET_SYSTEM_ROOT
46 # define TARGET_SYSTEM_ROOT NULL
49 static int saved_lineno;
52 static cpp_options *cpp_opts;
55 static const char *this_input_filename;
57 /* Filename and stream for preprocessed output. */
58 static const char *out_fname;
59 static FILE *out_stream;
61 /* Append dependencies to deps_file. */
62 static bool deps_append;
64 /* If dependency switches (-MF etc.) have been given. */
65 static bool deps_seen;
70 /* Dependency output file. */
71 static const char *deps_file;
73 /* The prefix given by -iprefix, if any. */
74 static const char *iprefix;
76 /* The system root, if any. Overridden by -isysroot. */
77 static const char *sysroot = TARGET_SYSTEM_ROOT;
79 /* Zero disables all standard directories for headers. */
80 static bool std_inc = true;
82 /* Zero disables the C++-specific standard directories for headers. */
83 static bool std_cxx_inc = true;
85 /* If the quote chain has been split by -I-. */
86 static bool quote_chain_split;
88 /* If -Wunused-macros. */
89 static bool warn_unused_macros;
91 /* Number of deferred options. */
92 static size_t deferred_count;
94 /* Number of deferred options scanned for -include. */
95 static size_t include_cursor;
97 /* Permit Fotran front-end options. */
98 static bool permit_fortran_options;
100 static void set_Wimplicit (int);
101 static void handle_OPT_d (const char *);
102 static void set_std_cxx98 (int);
103 static void set_std_c89 (int, int);
104 static void set_std_c99 (int);
105 static void check_deps_environment_vars (void);
106 static void handle_deferred_opts (void);
107 static void sanitize_cpp_opts (void);
108 static void add_prefixed_path (const char *, size_t);
109 static void push_command_line_include (void);
110 static void cb_file_change (cpp_reader *, const struct line_map *);
111 static void finish_options (const char *);
113 #ifndef STDC_0_IN_SYSTEM_HEADERS
114 #define STDC_0_IN_SYSTEM_HEADERS 0
117 /* Holds switches parsed by c_common_handle_option (), but whose
118 handling is deferred to c_common_post_options (). */
119 static void defer_opt (enum opt_code, const char *);
120 static struct deferred_opt
126 /* Complain that switch CODE expects an argument but none was
127 provided. OPT was the command-line option. Return FALSE to get
128 the default message in opts.c, TRUE if we provide a specialized
131 c_common_missing_argument (const char *opt, size_t code)
136 /* Pick up the default message. */
139 case OPT_fconstant_string_class_:
140 error ("no class name specified with \"%s\"", opt);
144 error ("assertion missing after \"%s\"", opt);
149 error ("macro name missing after \"%s\"", opt);
156 error ("missing path after \"%s\"", opt);
165 error ("missing filename after \"%s\"", opt);
170 error ("missing makefile target after \"%s\"", opt);
177 /* Defer option CODE with argument ARG. */
179 defer_opt (enum opt_code code, const char *arg)
181 deferred_opts[deferred_count].code = code;
182 deferred_opts[deferred_count].arg = arg;
186 /* Common initialization before parsing options. */
188 c_common_init_options (unsigned int argc, const char **argv ATTRIBUTE_UNUSED)
190 static const unsigned int lang_flags[] = {CL_C, CL_ObjC, CL_CXX, CL_ObjCXX};
193 /* This is conditionalized only because that is the way the front
194 ends used to do it. Maybe this should be unconditional? */
195 if (c_dialect_cxx ())
197 /* By default wrap lines at 80 characters. Is getenv
198 ("COLUMNS") preferable? */
199 diagnostic_line_cutoff (global_dc) = 80;
200 /* By default, emit location information once for every
201 diagnostic message. */
202 diagnostic_prefixing_rule (global_dc) = DIAGNOSTICS_SHOW_PREFIX_ONCE;
205 parse_in = cpp_create_reader (c_dialect_cxx () ? CLK_GNUCXX: CLK_GNUC89,
208 cpp_opts = cpp_get_options (parse_in);
209 cpp_opts->dollars_in_ident = DOLLARS_IN_IDENTIFIERS;
210 cpp_opts->objc = c_dialect_objc ();
212 /* Reset to avoid warnings on internal definitions. We set it just
213 before passing on command-line options to cpplib. */
214 cpp_opts->warn_dollars = 0;
216 flag_const_strings = c_dialect_cxx ();
217 flag_exceptions = c_dialect_cxx ();
218 warn_pointer_arith = c_dialect_cxx ();
220 deferred_opts = xmalloc (argc * sizeof (struct deferred_opt));
222 result = lang_flags[c_language];
224 /* If potentially preprocessing Fortran we have to accept its front
225 end options since the driver passes most of them through. */
227 if (c_language == clk_c && argc > 2
228 && !strcmp (argv[2], "-traditional-cpp" ))
230 permit_fortran_options = true;
238 /* Handle switch SCODE with argument ARG. ON is true, unless no-
239 form of an -f or -W option was given. Returns 0 if the switch was
240 invalid, a negative number to prevent language-independent
241 processing in toplev.c (a hack necessary for the short-term). */
243 c_common_handle_option (size_t scode, const char *arg, int value)
245 const struct cl_option *option = &cl_options[scode];
246 enum opt_code code = (enum opt_code) scode;
252 result = permit_fortran_options;
255 case OPT__output_pch_:
260 defer_opt (code, arg);
264 cpp_opts->discard_comments = 0;
268 cpp_opts->discard_comments = 0;
269 cpp_opts->discard_comments_in_macro_exp = 0;
273 defer_opt (code, arg);
277 flag_preprocess_only = 1;
281 cpp_opts->print_include_names = 1;
285 if (strcmp (arg, "-"))
286 add_path (xstrdup (arg), BRACKET, 0);
289 if (quote_chain_split)
290 error ("-I- specified twice");
291 quote_chain_split = true;
292 split_quote_chain ();
298 /* When doing dependencies with -M or -MM, suppress normal
299 preprocessed output, but still do -dM etc. as software
300 depends on this. Preprocessed output does occur if -MD, -MMD
301 or environment var dependency generation is used. */
302 cpp_opts->deps.style = (code == OPT_M ? DEPS_SYSTEM: DEPS_USER);
304 cpp_opts->inhibit_warnings = 1;
309 cpp_opts->deps.style = (code == OPT_MD ? DEPS_SYSTEM: DEPS_USER);
320 cpp_opts->deps.missing_files = true;
325 cpp_opts->deps.phony_targets = true;
331 defer_opt (code, arg);
335 flag_no_line_commands = 1;
339 defer_opt (code, arg);
349 set_Wimplicit (value);
350 warn_char_subscripts = value;
351 warn_missing_braces = value;
352 warn_parentheses = value;
353 warn_return_type = value;
354 warn_sequence_point = value; /* Was C only. */
355 if (c_dialect_cxx ())
356 warn_sign_compare = value;
358 warn_strict_aliasing = value;
360 /* Only warn about unknown pragmas that are not in system
362 warn_unknown_pragmas = value;
364 /* We save the value of warn_uninitialized, since if they put
365 -Wuninitialized on the command line, we need to generate a
366 warning about not using it without also specifying -O. */
367 if (warn_uninitialized != 1)
368 warn_uninitialized = (value ? 2 : 0);
370 if (!c_dialect_cxx ())
371 /* We set this to 2 here, but 1 in -Wmain, so -ffreestanding
372 can turn it off only if it's not explicit. */
373 warn_main = value * 2;
376 /* C++-specific warnings. */
377 warn_nonvdtor = value;
378 warn_reorder = value;
379 warn_nontemplate_friend = value;
382 cpp_opts->warn_trigraphs = value;
383 cpp_opts->warn_comments = value;
384 cpp_opts->warn_num_sign_change = value;
385 cpp_opts->warn_multichar = value; /* Was C++ only. */
388 case OPT_Wbad_function_cast:
389 warn_bad_function_cast = value;
393 warn_cast_qual = value;
396 case OPT_Wchar_subscripts:
397 warn_char_subscripts = value;
402 cpp_opts->warn_comments = value;
405 case OPT_Wconversion:
406 warn_conversion = value;
409 case OPT_Wctor_dtor_privacy:
410 warn_ctor_dtor_privacy = value;
413 case OPT_Wdeclaration_after_statement:
414 warn_declaration_after_statement = value;
417 case OPT_Wdeprecated:
418 warn_deprecated = value;
419 cpp_opts->warn_deprecated = value;
422 case OPT_Wdiv_by_zero:
423 warn_div_by_zero = value;
430 case OPT_Wendif_labels:
431 cpp_opts->warn_endif_labels = value;
435 cpp_opts->warnings_are_errors = value;
438 case OPT_Werror_implicit_function_declaration:
439 mesg_implicit_function_declaration = 2;
442 case OPT_Wfloat_equal:
443 warn_float_equal = value;
451 set_Wformat (atoi (arg));
454 case OPT_Wformat_extra_args:
455 warn_format_extra_args = value;
458 case OPT_Wformat_nonliteral:
459 warn_format_nonliteral = value;
462 case OPT_Wformat_security:
463 warn_format_security = value;
466 case OPT_Wformat_y2k:
467 warn_format_y2k = value;
470 case OPT_Wformat_zero_length:
471 warn_format_zero_length = value;
475 set_Wimplicit (value);
478 case OPT_Wimplicit_function_declaration:
479 mesg_implicit_function_declaration = value;
482 case OPT_Wimplicit_int:
483 warn_implicit_int = value;
487 /* Silently ignore for now. */
490 case OPT_Winvalid_offsetof:
491 warn_invalid_offsetof = value;
494 case OPT_Winvalid_pch:
495 cpp_opts->warn_invalid_pch = value;
499 warn_long_long = value;
509 case OPT_Wmissing_braces:
510 warn_missing_braces = value;
513 case OPT_Wmissing_declarations:
514 warn_missing_declarations = value;
517 case OPT_Wmissing_format_attribute:
518 warn_missing_format_attribute = value;
521 case OPT_Wmissing_prototypes:
522 warn_missing_prototypes = value;
526 cpp_opts->warn_multichar = value;
529 case OPT_Wnested_externs:
530 warn_nested_externs = value;
533 case OPT_Wnon_template_friend:
534 warn_nontemplate_friend = value;
537 case OPT_Wnon_virtual_dtor:
538 warn_nonvdtor = value;
542 warn_nonnull = value;
545 case OPT_Wold_style_cast:
546 warn_old_style_cast = value;
549 case OPT_Woverloaded_virtual:
550 warn_overloaded_virtual = value;
553 case OPT_Wparentheses:
554 warn_parentheses = value;
557 case OPT_Wpmf_conversions:
558 warn_pmf2ptr = value;
561 case OPT_Wpointer_arith:
562 warn_pointer_arith = value;
566 warn_protocol = value;
570 warn_selector = value;
573 case OPT_Wredundant_decls:
574 warn_redundant_decls = value;
578 warn_reorder = value;
581 case OPT_Wreturn_type:
582 warn_return_type = value;
585 case OPT_Wsequence_point:
586 warn_sequence_point = value;
589 case OPT_Wsign_compare:
590 warn_sign_compare = value;
593 case OPT_Wsign_promo:
594 warn_sign_promo = value;
597 case OPT_Wstrict_prototypes:
598 warn_strict_prototypes = value;
605 case OPT_Wsystem_headers:
606 cpp_opts->warn_system_headers = value;
609 case OPT_Wtraditional:
610 warn_traditional = value;
611 cpp_opts->warn_traditional = value;
615 cpp_opts->warn_trigraphs = value;
618 case OPT_Wundeclared_selector:
619 warn_undeclared_selector = value;
623 cpp_opts->warn_undef = value;
626 case OPT_Wunknown_pragmas:
627 /* Set to greater than 1, so that even unknown pragmas in
628 system headers will be warned about. */
629 warn_unknown_pragmas = value * 2;
632 case OPT_Wunused_macros:
633 warn_unused_macros = value;
636 case OPT_Wwrite_strings:
637 if (!c_dialect_cxx ())
638 flag_const_strings = value;
640 warn_write_strings = value;
644 if (!c_dialect_cxx ())
645 set_std_c89 (false, true);
647 set_std_cxx98 (true);
654 case OPT_fcond_mismatch:
655 if (!c_dialect_cxx ())
657 flag_cond_mismatch = value;
662 case OPT_fall_virtual:
663 case OPT_fenum_int_equiv:
664 case OPT_fguiding_decls:
666 case OPT_fhuge_objects:
668 case OPT_fname_mangling_version_:
670 case OPT_fnonnull_objects:
672 case OPT_fstrict_prototype:
673 case OPT_fthis_is_variable:
674 case OPT_fvtable_thunks:
677 warning ("switch \"%s\" is no longer supported", option->opt_text);
680 case OPT_fabi_version_:
681 flag_abi_version = value;
684 case OPT_faccess_control:
685 flag_access_control = value;
688 case OPT_falt_external_templates:
689 flag_alt_external_templates = value;
691 flag_external_templates = true;
693 warning ("switch \"%s\" is deprecated, please see documentation "
694 "for details", option->opt_text);
698 flag_no_asm = !value;
702 flag_no_builtin = !value;
709 disable_builtin_function (arg);
712 case OPT_fdollars_in_identifiers:
713 cpp_opts->dollars_in_ident = value;
717 if (!dump_switch_p (arg))
721 case OPT_ffreestanding:
723 /* Fall through.... */
726 flag_no_builtin = !value;
727 /* warn_main will be 2 if set by -Wall, 1 if set by -Wmain */
728 if (!value && warn_main == 2)
732 case OPT_fshort_double:
733 flag_short_double = value;
736 case OPT_fshort_enums:
737 flag_short_enums = value;
740 case OPT_fshort_wchar:
741 flag_short_wchar = value;
744 case OPT_fsigned_bitfields:
745 flag_signed_bitfields = value;
746 explicit_flag_signed_bitfields = 1;
749 case OPT_fsigned_char:
750 flag_signed_char = value;
753 case OPT_funsigned_bitfields:
754 flag_signed_bitfields = !value;
755 explicit_flag_signed_bitfields = 1;
758 case OPT_funsigned_char:
759 flag_signed_char = !value;
763 flag_check_new = value;
766 case OPT_fconserve_space:
767 flag_conserve_space = value;
770 case OPT_fconst_strings:
771 flag_const_strings = value;
774 case OPT_fconstant_string_class_:
775 constant_string_class_name = arg;
778 case OPT_fdefault_inline:
779 flag_default_inline = value;
782 case OPT_felide_constructors:
783 flag_elide_constructors = value;
786 case OPT_fenforce_eh_specs:
787 flag_enforce_eh_specs = value;
790 case OPT_fexternal_templates:
791 flag_external_templates = value;
794 case OPT_ffixed_form:
795 case OPT_ffixed_line_length_:
796 /* Fortran front end options ignored when preprocessing only. */
797 if (!flag_preprocess_only)
802 flag_new_for_scope = value;
805 case OPT_fgnu_keywords:
806 flag_no_gnu_keywords = !value;
809 case OPT_fgnu_runtime:
810 flag_next_runtime = !value;
813 case OPT_fhandle_exceptions:
814 warning ("-fhandle-exceptions has been renamed -fexceptions (and is now on by default)");
815 flag_exceptions = value;
818 case OPT_fimplement_inlines:
819 flag_implement_inlines = value;
822 case OPT_fimplicit_inline_templates:
823 flag_implicit_inline_templates = value;
826 case OPT_fimplicit_templates:
827 flag_implicit_templates = value;
830 case OPT_fms_extensions:
831 flag_ms_extensions = value;
834 case OPT_fnext_runtime:
835 flag_next_runtime = value;
838 case OPT_fnonansi_builtins:
839 flag_no_nonansi_builtin = !value;
842 case OPT_foperator_names:
843 cpp_opts->operator_names = value;
846 case OPT_foptional_diags:
847 flag_optional_diags = value;
851 cpp_opts->restore_pch_deps = value;
854 case OPT_fpermissive:
855 flag_permissive = value;
858 case OPT_fpreprocessed:
859 cpp_opts->preprocessed = value;
863 flag_use_repository = value;
865 flag_implicit_templates = 0;
872 case OPT_fshow_column:
873 cpp_opts->show_column = value;
877 flag_detailed_statistics = value;
881 /* It is documented that we silently ignore silly values. */
882 if (value >= 1 && value <= 100)
883 cpp_opts->tabstop = value;
886 case OPT_fexec_charset_:
887 cpp_opts->narrow_charset = arg;
890 case OPT_fwide_exec_charset_:
891 cpp_opts->wide_charset = arg;
894 case OPT_ftemplate_depth_:
895 max_tinst_depth = value;
898 case OPT_fuse_cxa_atexit:
899 flag_use_cxa_atexit = value;
907 flag_gen_declaration = 1;
911 add_path (xstrdup (arg), AFTER, 0);
916 defer_opt (code, arg);
928 add_path (xstrdup (arg), SYSTEM, 0);
931 case OPT_iwithprefix:
932 add_prefixed_path (arg, SYSTEM);
935 case OPT_iwithprefixbefore:
936 add_prefixed_path (arg, BRACKET);
940 cpp_set_lang (parse_in, CLK_ASM);
941 cpp_opts->dollars_in_ident = false;
960 error ("output filename specified twice");
963 /* We need to handle the -pedantic switches here, rather than in
964 c_common_post_options, so that a subsequent -Wno-endif-labels
965 is not overridden. */
966 case OPT_pedantic_errors:
967 cpp_opts->pedantic_errors = 1;
970 cpp_opts->pedantic = 1;
971 cpp_opts->warn_endif_labels = 1;
974 case OPT_print_objc_runtime_info:
975 print_struct_values = 1;
983 case OPT_std_gnu__98:
984 set_std_cxx98 (code == OPT_std_c__98 /* ISO */);
988 case OPT_std_iso9899_1990:
989 case OPT_std_iso9899_199409:
990 set_std_c89 (code == OPT_std_iso9899_199409 /* c94 */, true /* ISO */);
994 set_std_c89 (false /* c94 */, false /* ISO */);
999 case OPT_std_iso9899_1999:
1000 case OPT_std_iso9899_199x:
1001 set_std_c99 (true /* ISO */);
1006 set_std_c99 (false /* ISO */);
1010 cpp_opts->trigraphs = 1;
1013 case OPT_traditional_cpp:
1014 cpp_opts->traditional = 1;
1022 cpp_opts->inhibit_warnings = 1;
1033 /* Post-switch processing. */
1035 c_common_post_options (const char **pfilename)
1037 /* Canonicalize the input and output filenames. */
1038 if (in_fnames == NULL)
1040 in_fnames = xmalloc (sizeof (in_fnames[0]));
1043 else if (strcmp (in_fnames[0], "-") == 0)
1046 if (out_fname == NULL || !strcmp (out_fname, "-"))
1049 if (cpp_opts->deps.style == DEPS_NONE)
1050 check_deps_environment_vars ();
1052 handle_deferred_opts ();
1054 sanitize_cpp_opts ();
1056 register_include_chains (parse_in, sysroot, iprefix,
1057 std_inc, std_cxx_inc && c_dialect_cxx (), verbose);
1059 flag_inline_trees = 1;
1061 /* Use tree inlining if possible. Function instrumentation is only
1062 done in the RTL level, so we disable tree inlining. */
1063 if (! flag_instrument_function_entry_exit)
1065 if (!flag_no_inline)
1067 if (flag_inline_functions)
1069 flag_inline_trees = 2;
1070 flag_inline_functions = 0;
1074 /* -Wextra implies -Wsign-compare, but not if explicitly
1076 if (warn_sign_compare == -1)
1077 warn_sign_compare = extra_warnings;
1079 /* Special format checking options don't work without -Wformat; warn if
1081 if (warn_format_y2k && !warn_format)
1082 warning ("-Wformat-y2k ignored without -Wformat");
1083 if (warn_format_extra_args && !warn_format)
1084 warning ("-Wformat-extra-args ignored without -Wformat");
1085 if (warn_format_zero_length && !warn_format)
1086 warning ("-Wformat-zero-length ignored without -Wformat");
1087 if (warn_format_nonliteral && !warn_format)
1088 warning ("-Wformat-nonliteral ignored without -Wformat");
1089 if (warn_format_security && !warn_format)
1090 warning ("-Wformat-security ignored without -Wformat");
1091 if (warn_missing_format_attribute && !warn_format)
1092 warning ("-Wmissing-format-attribute ignored without -Wformat");
1094 if (flag_preprocess_only)
1096 /* Open the output now. We must do so even if flag_no_output is
1097 on, because there may be other output than from the actual
1098 preprocessing (e.g. from -dM). */
1099 if (out_fname[0] == '\0')
1100 out_stream = stdout;
1102 out_stream = fopen (out_fname, "w");
1104 if (out_stream == NULL)
1106 fatal_error ("opening output file %s: %m", out_fname);
1110 if (num_in_fnames > 1)
1111 error ("too many filenames given. Type %s --help for usage",
1114 init_pp_output (out_stream);
1120 /* Yuk. WTF is this? I do know ObjC relies on it somewhere. */
1124 cpp_get_callbacks (parse_in)->file_change = cb_file_change;
1126 /* NOTE: we use in_fname here, not the one supplied. */
1127 *pfilename = cpp_read_main_file (parse_in, in_fnames[0]);
1129 saved_lineno = input_line;
1132 /* If an error has occurred in cpplib, note it so we fail
1134 errorcount += cpp_errors (parse_in);
1136 return flag_preprocess_only;
1139 /* Front end initialization common to C, ObjC and C++. */
1141 c_common_init (void)
1143 input_line = saved_lineno;
1145 /* Set up preprocessor arithmetic. Must be done after call to
1146 c_common_nodes_and_builtins for type nodes to be good. */
1147 cpp_opts->precision = TYPE_PRECISION (intmax_type_node);
1148 cpp_opts->char_precision = TYPE_PRECISION (char_type_node);
1149 cpp_opts->int_precision = TYPE_PRECISION (integer_type_node);
1150 cpp_opts->wchar_precision = TYPE_PRECISION (wchar_type_node);
1151 cpp_opts->unsigned_wchar = TREE_UNSIGNED (wchar_type_node);
1152 cpp_opts->bytes_big_endian = BYTES_BIG_ENDIAN;
1154 /* This can't happen until after wchar_precision and bytes_big_endian
1156 cpp_init_iconv (parse_in);
1158 if (flag_preprocess_only)
1160 finish_options (in_fnames[0]);
1161 preprocess_file (parse_in);
1165 /* Has to wait until now so that cpplib has its hash table. */
1171 /* Initialize the integrated preprocessor after debug output has been
1172 initialized; loop over each input file. */
1174 c_common_parse_file (int set_yydebug ATTRIBUTE_UNUSED)
1176 unsigned file_index;
1179 yydebug = set_yydebug;
1181 warning ("YYDEBUG not defined");
1190 /* Reset the state of the parser. */
1193 /* Reset cpplib's macros and start a new file. */
1194 cpp_undef_all (parse_in);
1195 cpp_stack_file (parse_in, in_fnames[file_index]);
1198 finish_options(in_fnames[file_index]);
1199 if (file_index == 0)
1204 } while (file_index < num_in_fnames);
1206 free_parser_stacks ();
1210 /* Common finish hook for the C, ObjC and C++ front ends. */
1212 c_common_finish (void)
1214 FILE *deps_stream = NULL;
1216 if (cpp_opts->deps.style != DEPS_NONE)
1218 /* If -M or -MM was seen without -MF, default output to the
1221 deps_stream = out_stream;
1224 deps_stream = fopen (deps_file, deps_append ? "a": "w");
1226 fatal_error ("opening dependency file %s: %m", deps_file);
1230 /* For performance, avoid tearing down cpplib's internal structures
1231 with cpp_destroy (). */
1232 errorcount += cpp_finish (parse_in, deps_stream);
1234 if (deps_stream && deps_stream != out_stream
1235 && (ferror (deps_stream) || fclose (deps_stream)))
1236 fatal_error ("closing dependency file %s: %m", deps_file);
1238 if (out_stream && (ferror (out_stream) || fclose (out_stream)))
1239 fatal_error ("when writing output to %s: %m", out_fname);
1242 /* Either of two environment variables can specify output of
1243 dependencies. Their value is either "OUTPUT_FILE" or "OUTPUT_FILE
1244 DEPS_TARGET", where OUTPUT_FILE is the file to write deps info to
1245 and DEPS_TARGET is the target to mention in the deps. They also
1246 result in dependency information being appended to the output file
1247 rather than overwriting it, and like Sun's compiler
1248 SUNPRO_DEPENDENCIES suppresses the dependency on the main file. */
1250 check_deps_environment_vars (void)
1254 GET_ENVIRONMENT (spec, "DEPENDENCIES_OUTPUT");
1256 cpp_opts->deps.style = DEPS_USER;
1259 GET_ENVIRONMENT (spec, "SUNPRO_DEPENDENCIES");
1262 cpp_opts->deps.style = DEPS_SYSTEM;
1263 cpp_opts->deps.ignore_main_file = true;
1269 /* Find the space before the DEPS_TARGET, if there is one. */
1270 char *s = strchr (spec, ' ');
1273 /* Let the caller perform MAKE quoting. */
1274 defer_opt (OPT_MT, s + 1);
1278 /* Command line -MF overrides environment variables and default. */
1286 /* Handle deferred command line switches. */
1288 handle_deferred_opts (void)
1292 for (i = 0; i < deferred_count; i++)
1294 struct deferred_opt *opt = &deferred_opts[i];
1296 if (opt->code == OPT_MT || opt->code == OPT_MQ)
1297 cpp_add_dependency_target (parse_in, opt->arg, opt->code == OPT_MQ);
1301 /* These settings are appropriate for GCC, but not necessarily so for
1302 cpplib as a library. */
1304 sanitize_cpp_opts (void)
1306 /* If we don't know what style of dependencies to output, complain
1307 if any other dependency switches have been given. */
1308 if (deps_seen && cpp_opts->deps.style == DEPS_NONE)
1309 error ("to generate dependencies you must specify either -M or -MM");
1311 /* -dM and dependencies suppress normal output; do it here so that
1312 the last -d[MDN] switch overrides earlier ones. */
1313 if (flag_dump_macros == 'M')
1316 /* Disable -dD, -dN and -dI if normal output is suppressed. Allow
1317 -dM since at least glibc relies on -M -dM to work. */
1320 if (flag_dump_macros != 'M')
1321 flag_dump_macros = 0;
1322 flag_dump_includes = 0;
1325 cpp_opts->unsigned_char = !flag_signed_char;
1326 cpp_opts->stdc_0_in_system_headers = STDC_0_IN_SYSTEM_HEADERS;
1328 /* We want -Wno-long-long to override -pedantic -std=non-c99
1329 and/or -Wtraditional, whatever the ordering. */
1330 cpp_opts->warn_long_long
1331 = warn_long_long && ((!flag_isoc99 && pedantic) || warn_traditional);
1334 /* Add include path with a prefix at the front of its name. */
1336 add_prefixed_path (const char *suffix, size_t chain)
1340 size_t prefix_len, suffix_len;
1342 suffix_len = strlen (suffix);
1343 prefix = iprefix ? iprefix : cpp_GCC_INCLUDE_DIR;
1344 prefix_len = iprefix ? strlen (iprefix) : cpp_GCC_INCLUDE_DIR_len;
1346 path = xmalloc (prefix_len + suffix_len + 1);
1347 memcpy (path, prefix, prefix_len);
1348 memcpy (path + prefix_len, suffix, suffix_len);
1349 path[prefix_len + suffix_len] = '\0';
1351 add_path (path, chain, 0);
1354 /* Handle -D, -U, -A, -imacros, and the first -include.
1355 TIF is the input file to which we will return after processing all
1358 finish_options (const char *tif)
1360 if (!cpp_opts->preprocessed)
1364 cpp_change_file (parse_in, LC_RENAME, _("<built-in>"));
1365 cpp_init_builtins (parse_in, flag_hosted);
1366 c_cpp_builtins (parse_in);
1368 /* We're about to send user input to cpplib, so make it warn for
1369 things that we previously (when we sent it internal definitions)
1370 told it to not warn.
1372 C99 permits implementation-defined characters in identifiers.
1373 The documented meaning of -std= is to turn off extensions that
1374 conflict with the specified standard, and since a strictly
1375 conforming program cannot contain a '$', we do not condition
1376 their acceptance on the -std= setting. */
1377 cpp_opts->warn_dollars = (cpp_opts->pedantic && !cpp_opts->c99);
1379 cpp_change_file (parse_in, LC_RENAME, _("<command line>"));
1380 for (i = 0; i < deferred_count; i++)
1382 struct deferred_opt *opt = &deferred_opts[i];
1384 if (opt->code == OPT_D)
1385 cpp_define (parse_in, opt->arg);
1386 else if (opt->code == OPT_U)
1387 cpp_undef (parse_in, opt->arg);
1388 else if (opt->code == OPT_A)
1390 if (opt->arg[0] == '-')
1391 cpp_unassert (parse_in, opt->arg + 1);
1393 cpp_assert (parse_in, opt->arg);
1397 /* Handle -imacros after -D and -U. */
1398 for (i = 0; i < deferred_count; i++)
1400 struct deferred_opt *opt = &deferred_opts[i];
1402 if (opt->code == OPT_imacros
1403 && cpp_push_include (parse_in, opt->arg))
1404 cpp_scan_nooutput (parse_in);
1409 this_input_filename = tif;
1410 push_command_line_include ();
1413 /* Give CPP the next file given by -include, if any. */
1415 push_command_line_include (void)
1417 if (cpp_opts->preprocessed)
1420 while (include_cursor < deferred_count)
1422 struct deferred_opt *opt = &deferred_opts[include_cursor++];
1424 if (opt->code == OPT_include && cpp_push_include (parse_in, opt->arg))
1428 if (include_cursor == deferred_count)
1430 /* Restore the line map from <command line>. */
1431 cpp_change_file (parse_in, LC_RENAME, this_input_filename);
1432 /* -Wunused-macros should only warn about macros defined hereafter. */
1433 cpp_opts->warn_unused_macros = warn_unused_macros;
1438 /* File change callback. Has to handle -include files. */
1440 cb_file_change (cpp_reader *pfile ATTRIBUTE_UNUSED,
1441 const struct line_map *new_map)
1443 if (flag_preprocess_only)
1444 pp_file_change (new_map);
1446 fe_file_change (new_map);
1448 if (new_map->reason == LC_LEAVE && MAIN_FILE_P (new_map))
1449 push_command_line_include ();
1452 /* Set the C 89 standard (with 1994 amendments if C94, without GNU
1453 extensions if ISO). There is no concept of gnu94. */
1455 set_std_c89 (int c94, int iso)
1457 cpp_set_lang (parse_in, c94 ? CLK_STDC94: iso ? CLK_STDC89: CLK_GNUC89);
1460 flag_no_gnu_keywords = iso;
1461 flag_no_nonansi_builtin = iso;
1464 flag_writable_strings = 0;
1467 /* Set the C 99 standard (without GNU extensions if ISO). */
1469 set_std_c99 (int iso)
1471 cpp_set_lang (parse_in, iso ? CLK_STDC99: CLK_GNUC99);
1473 flag_no_nonansi_builtin = iso;
1477 flag_writable_strings = 0;
1480 /* Set the C++ 98 standard (without GNU extensions if ISO). */
1482 set_std_cxx98 (int iso)
1484 cpp_set_lang (parse_in, iso ? CLK_CXX98: CLK_GNUCXX);
1485 flag_no_gnu_keywords = iso;
1486 flag_no_nonansi_builtin = iso;
1490 /* Handle setting implicit to ON. */
1492 set_Wimplicit (int on)
1495 warn_implicit_int = on;
1498 if (mesg_implicit_function_declaration != 2)
1499 mesg_implicit_function_declaration = 1;
1502 mesg_implicit_function_declaration = 0;
1505 /* Args to -d specify what to dump. Silently ignore
1506 unrecognized options; they may be aimed at toplev.c. */
1508 handle_OPT_d (const char *arg)
1512 while ((c = *arg++) != '\0')
1515 case 'M': /* Dump macros only. */
1516 case 'N': /* Dump names. */
1517 case 'D': /* Dump definitions. */
1518 flag_dump_macros = c;
1522 flag_dump_includes = 1;