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. VALUE 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;
338 case OPT_fworking_directory
:
339 flag_working_directory
= value
;
343 defer_opt (code
, arg
);
353 set_Wimplicit (value
);
354 warn_char_subscripts
= value
;
355 warn_missing_braces
= value
;
356 warn_parentheses
= value
;
357 warn_return_type
= value
;
358 warn_sequence_point
= value
; /* Was C only. */
359 if (c_dialect_cxx ())
360 warn_sign_compare
= value
;
362 warn_strict_aliasing
= value
;
364 /* Only warn about unknown pragmas that are not in system
366 warn_unknown_pragmas
= value
;
368 /* We save the value of warn_uninitialized, since if they put
369 -Wuninitialized on the command line, we need to generate a
370 warning about not using it without also specifying -O. */
371 if (warn_uninitialized
!= 1)
372 warn_uninitialized
= (value
? 2 : 0);
374 if (!c_dialect_cxx ())
375 /* We set this to 2 here, but 1 in -Wmain, so -ffreestanding
376 can turn it off only if it's not explicit. */
377 warn_main
= value
* 2;
380 /* C++-specific warnings. */
381 warn_nonvdtor
= value
;
382 warn_reorder
= value
;
383 warn_nontemplate_friend
= value
;
386 cpp_opts
->warn_trigraphs
= value
;
387 cpp_opts
->warn_comments
= value
;
388 cpp_opts
->warn_num_sign_change
= value
;
389 cpp_opts
->warn_multichar
= value
; /* Was C++ only. */
392 case OPT_Wbad_function_cast
:
393 warn_bad_function_cast
= value
;
397 warn_cast_qual
= value
;
400 case OPT_Wchar_subscripts
:
401 warn_char_subscripts
= value
;
406 cpp_opts
->warn_comments
= value
;
409 case OPT_Wconversion
:
410 warn_conversion
= value
;
413 case OPT_Wctor_dtor_privacy
:
414 warn_ctor_dtor_privacy
= value
;
417 case OPT_Wdeclaration_after_statement
:
418 warn_declaration_after_statement
= value
;
421 case OPT_Wdeprecated
:
422 warn_deprecated
= value
;
423 cpp_opts
->warn_deprecated
= value
;
426 case OPT_Wdiv_by_zero
:
427 warn_div_by_zero
= value
;
434 case OPT_Wendif_labels
:
435 cpp_opts
->warn_endif_labels
= value
;
439 cpp_opts
->warnings_are_errors
= value
;
442 case OPT_Werror_implicit_function_declaration
:
443 mesg_implicit_function_declaration
= 2;
446 case OPT_Wfloat_equal
:
447 warn_float_equal
= value
;
455 set_Wformat (atoi (arg
));
458 case OPT_Wformat_extra_args
:
459 warn_format_extra_args
= value
;
462 case OPT_Wformat_nonliteral
:
463 warn_format_nonliteral
= value
;
466 case OPT_Wformat_security
:
467 warn_format_security
= value
;
470 case OPT_Wformat_y2k
:
471 warn_format_y2k
= value
;
474 case OPT_Wformat_zero_length
:
475 warn_format_zero_length
= value
;
479 set_Wimplicit (value
);
482 case OPT_Wimplicit_function_declaration
:
483 mesg_implicit_function_declaration
= value
;
486 case OPT_Wimplicit_int
:
487 warn_implicit_int
= value
;
491 /* Silently ignore for now. */
494 case OPT_Winvalid_offsetof
:
495 warn_invalid_offsetof
= value
;
498 case OPT_Winvalid_pch
:
499 cpp_opts
->warn_invalid_pch
= value
;
503 warn_long_long
= value
;
513 case OPT_Wmissing_braces
:
514 warn_missing_braces
= value
;
517 case OPT_Wmissing_declarations
:
518 warn_missing_declarations
= value
;
521 case OPT_Wmissing_format_attribute
:
522 warn_missing_format_attribute
= value
;
525 case OPT_Wmissing_prototypes
:
526 warn_missing_prototypes
= value
;
530 cpp_opts
->warn_multichar
= value
;
533 case OPT_Wnested_externs
:
534 warn_nested_externs
= value
;
537 case OPT_Wnon_template_friend
:
538 warn_nontemplate_friend
= value
;
541 case OPT_Wnon_virtual_dtor
:
542 warn_nonvdtor
= value
;
546 warn_nonnull
= value
;
549 case OPT_Wold_style_cast
:
550 warn_old_style_cast
= value
;
553 case OPT_Woverloaded_virtual
:
554 warn_overloaded_virtual
= value
;
557 case OPT_Wparentheses
:
558 warn_parentheses
= value
;
561 case OPT_Wpmf_conversions
:
562 warn_pmf2ptr
= value
;
565 case OPT_Wpointer_arith
:
566 warn_pointer_arith
= value
;
570 warn_protocol
= value
;
574 warn_selector
= value
;
577 case OPT_Wredundant_decls
:
578 warn_redundant_decls
= value
;
582 warn_reorder
= value
;
585 case OPT_Wreturn_type
:
586 warn_return_type
= value
;
589 case OPT_Wsequence_point
:
590 warn_sequence_point
= value
;
593 case OPT_Wsign_compare
:
594 warn_sign_compare
= value
;
597 case OPT_Wsign_promo
:
598 warn_sign_promo
= value
;
601 case OPT_Wstrict_prototypes
:
602 warn_strict_prototypes
= value
;
609 case OPT_Wsystem_headers
:
610 cpp_opts
->warn_system_headers
= value
;
613 case OPT_Wtraditional
:
614 warn_traditional
= value
;
615 cpp_opts
->warn_traditional
= value
;
619 cpp_opts
->warn_trigraphs
= value
;
622 case OPT_Wundeclared_selector
:
623 warn_undeclared_selector
= value
;
627 cpp_opts
->warn_undef
= value
;
630 case OPT_Wunknown_pragmas
:
631 /* Set to greater than 1, so that even unknown pragmas in
632 system headers will be warned about. */
633 warn_unknown_pragmas
= value
* 2;
636 case OPT_Wunused_macros
:
637 warn_unused_macros
= value
;
640 case OPT_Wwrite_strings
:
641 if (!c_dialect_cxx ())
642 flag_const_strings
= value
;
644 warn_write_strings
= value
;
648 if (!c_dialect_cxx ())
649 set_std_c89 (false, true);
651 set_std_cxx98 (true);
658 case OPT_fcond_mismatch
:
659 if (!c_dialect_cxx ())
661 flag_cond_mismatch
= value
;
666 case OPT_fall_virtual
:
667 case OPT_fenum_int_equiv
:
668 case OPT_fguiding_decls
:
670 case OPT_fhuge_objects
:
672 case OPT_fname_mangling_version_
:
674 case OPT_fnonnull_objects
:
676 case OPT_fstrict_prototype
:
677 case OPT_fthis_is_variable
:
678 case OPT_fvtable_thunks
:
681 warning ("switch \"%s\" is no longer supported", option
->opt_text
);
684 case OPT_fabi_version_
:
685 flag_abi_version
= value
;
688 case OPT_faccess_control
:
689 flag_access_control
= value
;
692 case OPT_falt_external_templates
:
693 flag_alt_external_templates
= value
;
695 flag_external_templates
= true;
697 warning ("switch \"%s\" is deprecated, please see documentation "
698 "for details", option
->opt_text
);
702 flag_no_asm
= !value
;
706 flag_no_builtin
= !value
;
713 disable_builtin_function (arg
);
716 case OPT_fdollars_in_identifiers
:
717 cpp_opts
->dollars_in_ident
= value
;
721 if (!dump_switch_p (arg
))
725 case OPT_ffreestanding
:
727 /* Fall through.... */
730 flag_no_builtin
= !value
;
731 /* warn_main will be 2 if set by -Wall, 1 if set by -Wmain */
732 if (!value
&& warn_main
== 2)
736 case OPT_fshort_double
:
737 flag_short_double
= value
;
740 case OPT_fshort_enums
:
741 flag_short_enums
= value
;
744 case OPT_fshort_wchar
:
745 flag_short_wchar
= value
;
748 case OPT_fsigned_bitfields
:
749 flag_signed_bitfields
= value
;
750 explicit_flag_signed_bitfields
= 1;
753 case OPT_fsigned_char
:
754 flag_signed_char
= value
;
757 case OPT_funsigned_bitfields
:
758 flag_signed_bitfields
= !value
;
759 explicit_flag_signed_bitfields
= 1;
762 case OPT_funsigned_char
:
763 flag_signed_char
= !value
;
767 flag_check_new
= value
;
770 case OPT_fconserve_space
:
771 flag_conserve_space
= value
;
774 case OPT_fconst_strings
:
775 flag_const_strings
= value
;
778 case OPT_fconstant_string_class_
:
779 constant_string_class_name
= arg
;
782 case OPT_fdefault_inline
:
783 flag_default_inline
= value
;
786 case OPT_felide_constructors
:
787 flag_elide_constructors
= value
;
790 case OPT_fenforce_eh_specs
:
791 flag_enforce_eh_specs
= value
;
794 case OPT_fexternal_templates
:
795 flag_external_templates
= value
;
798 case OPT_ffixed_form
:
799 case OPT_ffixed_line_length_
:
800 /* Fortran front end options ignored when preprocessing only. */
801 if (!flag_preprocess_only
)
806 flag_new_for_scope
= value
;
809 case OPT_fgnu_keywords
:
810 flag_no_gnu_keywords
= !value
;
813 case OPT_fgnu_runtime
:
814 flag_next_runtime
= !value
;
817 case OPT_fhandle_exceptions
:
818 warning ("-fhandle-exceptions has been renamed -fexceptions (and is now on by default)");
819 flag_exceptions
= value
;
822 case OPT_fimplement_inlines
:
823 flag_implement_inlines
= value
;
826 case OPT_fimplicit_inline_templates
:
827 flag_implicit_inline_templates
= value
;
830 case OPT_fimplicit_templates
:
831 flag_implicit_templates
= value
;
834 case OPT_fms_extensions
:
835 flag_ms_extensions
= value
;
838 case OPT_fnext_runtime
:
839 flag_next_runtime
= value
;
842 case OPT_fnonansi_builtins
:
843 flag_no_nonansi_builtin
= !value
;
846 case OPT_foperator_names
:
847 cpp_opts
->operator_names
= value
;
850 case OPT_foptional_diags
:
851 flag_optional_diags
= value
;
855 cpp_opts
->restore_pch_deps
= value
;
858 case OPT_fpermissive
:
859 flag_permissive
= value
;
862 case OPT_fpreprocessed
:
863 cpp_opts
->preprocessed
= value
;
867 flag_use_repository
= value
;
869 flag_implicit_templates
= 0;
876 case OPT_fshow_column
:
877 cpp_opts
->show_column
= value
;
881 flag_detailed_statistics
= value
;
885 /* It is documented that we silently ignore silly values. */
886 if (value
>= 1 && value
<= 100)
887 cpp_opts
->tabstop
= value
;
890 case OPT_fexec_charset_
:
891 cpp_opts
->narrow_charset
= arg
;
894 case OPT_fwide_exec_charset_
:
895 cpp_opts
->wide_charset
= arg
;
898 case OPT_ftemplate_depth_
:
899 max_tinst_depth
= value
;
902 case OPT_fuse_cxa_atexit
:
903 flag_use_cxa_atexit
= value
;
911 flag_gen_declaration
= 1;
915 add_path (xstrdup (arg
), AFTER
, 0);
920 defer_opt (code
, arg
);
932 add_path (xstrdup (arg
), SYSTEM
, 0);
935 case OPT_iwithprefix
:
936 add_prefixed_path (arg
, SYSTEM
);
939 case OPT_iwithprefixbefore
:
940 add_prefixed_path (arg
, BRACKET
);
944 cpp_set_lang (parse_in
, CLK_ASM
);
945 cpp_opts
->dollars_in_ident
= false;
964 error ("output filename specified twice");
967 /* We need to handle the -pedantic switches here, rather than in
968 c_common_post_options, so that a subsequent -Wno-endif-labels
969 is not overridden. */
970 case OPT_pedantic_errors
:
971 cpp_opts
->pedantic_errors
= 1;
974 cpp_opts
->pedantic
= 1;
975 cpp_opts
->warn_endif_labels
= 1;
978 case OPT_print_objc_runtime_info
:
979 print_struct_values
= 1;
987 case OPT_std_gnu__98
:
988 set_std_cxx98 (code
== OPT_std_c__98
/* ISO */);
992 case OPT_std_iso9899_1990
:
993 case OPT_std_iso9899_199409
:
994 set_std_c89 (code
== OPT_std_iso9899_199409
/* c94 */, true /* ISO */);
998 set_std_c89 (false /* c94 */, false /* ISO */);
1003 case OPT_std_iso9899_1999
:
1004 case OPT_std_iso9899_199x
:
1005 set_std_c99 (true /* ISO */);
1010 set_std_c99 (false /* ISO */);
1014 cpp_opts
->trigraphs
= 1;
1017 case OPT_traditional_cpp
:
1018 cpp_opts
->traditional
= 1;
1026 cpp_opts
->inhibit_warnings
= 1;
1037 /* Post-switch processing. */
1039 c_common_post_options (const char **pfilename
)
1041 /* Canonicalize the input and output filenames. */
1042 if (in_fnames
== NULL
)
1044 in_fnames
= xmalloc (sizeof (in_fnames
[0]));
1047 else if (strcmp (in_fnames
[0], "-") == 0)
1050 if (out_fname
== NULL
|| !strcmp (out_fname
, "-"))
1053 if (cpp_opts
->deps
.style
== DEPS_NONE
)
1054 check_deps_environment_vars ();
1056 handle_deferred_opts ();
1058 sanitize_cpp_opts ();
1060 register_include_chains (parse_in
, sysroot
, iprefix
,
1061 std_inc
, std_cxx_inc
&& c_dialect_cxx (), verbose
);
1063 flag_inline_trees
= 1;
1065 /* Use tree inlining if possible. Function instrumentation is only
1066 done in the RTL level, so we disable tree inlining. */
1067 if (! flag_instrument_function_entry_exit
)
1069 if (!flag_no_inline
)
1071 if (flag_inline_functions
)
1073 flag_inline_trees
= 2;
1074 flag_inline_functions
= 0;
1078 /* -Wextra implies -Wsign-compare, but not if explicitly
1080 if (warn_sign_compare
== -1)
1081 warn_sign_compare
= extra_warnings
;
1083 /* Special format checking options don't work without -Wformat; warn if
1085 if (warn_format_y2k
&& !warn_format
)
1086 warning ("-Wformat-y2k ignored without -Wformat");
1087 if (warn_format_extra_args
&& !warn_format
)
1088 warning ("-Wformat-extra-args ignored without -Wformat");
1089 if (warn_format_zero_length
&& !warn_format
)
1090 warning ("-Wformat-zero-length ignored without -Wformat");
1091 if (warn_format_nonliteral
&& !warn_format
)
1092 warning ("-Wformat-nonliteral ignored without -Wformat");
1093 if (warn_format_security
&& !warn_format
)
1094 warning ("-Wformat-security ignored without -Wformat");
1095 if (warn_missing_format_attribute
&& !warn_format
)
1096 warning ("-Wmissing-format-attribute ignored without -Wformat");
1098 if (flag_preprocess_only
)
1100 /* Open the output now. We must do so even if flag_no_output is
1101 on, because there may be other output than from the actual
1102 preprocessing (e.g. from -dM). */
1103 if (out_fname
[0] == '\0')
1104 out_stream
= stdout
;
1106 out_stream
= fopen (out_fname
, "w");
1108 if (out_stream
== NULL
)
1110 fatal_error ("opening output file %s: %m", out_fname
);
1114 if (num_in_fnames
> 1)
1115 error ("too many filenames given. Type %s --help for usage",
1118 init_pp_output (out_stream
);
1124 /* Yuk. WTF is this? I do know ObjC relies on it somewhere. */
1128 cpp_get_callbacks (parse_in
)->file_change
= cb_file_change
;
1129 cpp_post_options (parse_in
);
1131 /* NOTE: we use in_fname here, not the one supplied. */
1132 *pfilename
= cpp_read_main_file (parse_in
, in_fnames
[0]);
1134 saved_lineno
= input_line
;
1137 /* If an error has occurred in cpplib, note it so we fail
1139 errorcount
+= cpp_errors (parse_in
);
1141 return flag_preprocess_only
;
1144 /* Front end initialization common to C, ObjC and C++. */
1146 c_common_init (void)
1148 input_line
= saved_lineno
;
1150 /* Set up preprocessor arithmetic. Must be done after call to
1151 c_common_nodes_and_builtins for type nodes to be good. */
1152 cpp_opts
->precision
= TYPE_PRECISION (intmax_type_node
);
1153 cpp_opts
->char_precision
= TYPE_PRECISION (char_type_node
);
1154 cpp_opts
->int_precision
= TYPE_PRECISION (integer_type_node
);
1155 cpp_opts
->wchar_precision
= TYPE_PRECISION (wchar_type_node
);
1156 cpp_opts
->unsigned_wchar
= TREE_UNSIGNED (wchar_type_node
);
1157 cpp_opts
->bytes_big_endian
= BYTES_BIG_ENDIAN
;
1159 /* This can't happen until after wchar_precision and bytes_big_endian
1161 cpp_init_iconv (parse_in
);
1163 if (flag_preprocess_only
)
1165 finish_options (in_fnames
[0]);
1166 preprocess_file (parse_in
);
1170 /* Has to wait until now so that cpplib has its hash table. */
1176 /* Initialize the integrated preprocessor after debug output has been
1177 initialized; loop over each input file. */
1179 c_common_parse_file (int set_yydebug ATTRIBUTE_UNUSED
)
1181 unsigned file_index
;
1184 yydebug
= set_yydebug
;
1186 warning ("YYDEBUG not defined");
1195 /* Reset the state of the parser. */
1198 /* Reset cpplib's macros and start a new file. */
1199 cpp_undef_all (parse_in
);
1200 cpp_read_main_file (parse_in
, in_fnames
[file_index
]);
1203 finish_options(in_fnames
[file_index
]);
1204 if (file_index
== 0)
1209 } while (file_index
< num_in_fnames
);
1211 free_parser_stacks ();
1215 /* Common finish hook for the C, ObjC and C++ front ends. */
1217 c_common_finish (void)
1219 FILE *deps_stream
= NULL
;
1221 if (cpp_opts
->deps
.style
!= DEPS_NONE
)
1223 /* If -M or -MM was seen without -MF, default output to the
1226 deps_stream
= out_stream
;
1229 deps_stream
= fopen (deps_file
, deps_append
? "a": "w");
1231 fatal_error ("opening dependency file %s: %m", deps_file
);
1235 /* For performance, avoid tearing down cpplib's internal structures
1236 with cpp_destroy (). */
1237 errorcount
+= cpp_finish (parse_in
, deps_stream
);
1239 if (deps_stream
&& deps_stream
!= out_stream
1240 && (ferror (deps_stream
) || fclose (deps_stream
)))
1241 fatal_error ("closing dependency file %s: %m", deps_file
);
1243 if (out_stream
&& (ferror (out_stream
) || fclose (out_stream
)))
1244 fatal_error ("when writing output to %s: %m", out_fname
);
1247 /* Either of two environment variables can specify output of
1248 dependencies. Their value is either "OUTPUT_FILE" or "OUTPUT_FILE
1249 DEPS_TARGET", where OUTPUT_FILE is the file to write deps info to
1250 and DEPS_TARGET is the target to mention in the deps. They also
1251 result in dependency information being appended to the output file
1252 rather than overwriting it, and like Sun's compiler
1253 SUNPRO_DEPENDENCIES suppresses the dependency on the main file. */
1255 check_deps_environment_vars (void)
1259 GET_ENVIRONMENT (spec
, "DEPENDENCIES_OUTPUT");
1261 cpp_opts
->deps
.style
= DEPS_USER
;
1264 GET_ENVIRONMENT (spec
, "SUNPRO_DEPENDENCIES");
1267 cpp_opts
->deps
.style
= DEPS_SYSTEM
;
1268 cpp_opts
->deps
.ignore_main_file
= true;
1274 /* Find the space before the DEPS_TARGET, if there is one. */
1275 char *s
= strchr (spec
, ' ');
1278 /* Let the caller perform MAKE quoting. */
1279 defer_opt (OPT_MT
, s
+ 1);
1283 /* Command line -MF overrides environment variables and default. */
1291 /* Handle deferred command line switches. */
1293 handle_deferred_opts (void)
1297 for (i
= 0; i
< deferred_count
; i
++)
1299 struct deferred_opt
*opt
= &deferred_opts
[i
];
1301 if (opt
->code
== OPT_MT
|| opt
->code
== OPT_MQ
)
1302 cpp_add_dependency_target (parse_in
, opt
->arg
, opt
->code
== OPT_MQ
);
1306 /* These settings are appropriate for GCC, but not necessarily so for
1307 cpplib as a library. */
1309 sanitize_cpp_opts (void)
1311 /* If we don't know what style of dependencies to output, complain
1312 if any other dependency switches have been given. */
1313 if (deps_seen
&& cpp_opts
->deps
.style
== DEPS_NONE
)
1314 error ("to generate dependencies you must specify either -M or -MM");
1316 /* -dM and dependencies suppress normal output; do it here so that
1317 the last -d[MDN] switch overrides earlier ones. */
1318 if (flag_dump_macros
== 'M')
1321 /* Disable -dD, -dN and -dI if normal output is suppressed. Allow
1322 -dM since at least glibc relies on -M -dM to work. */
1325 if (flag_dump_macros
!= 'M')
1326 flag_dump_macros
= 0;
1327 flag_dump_includes
= 0;
1330 cpp_opts
->unsigned_char
= !flag_signed_char
;
1331 cpp_opts
->stdc_0_in_system_headers
= STDC_0_IN_SYSTEM_HEADERS
;
1333 /* We want -Wno-long-long to override -pedantic -std=non-c99
1334 and/or -Wtraditional, whatever the ordering. */
1335 cpp_opts
->warn_long_long
1336 = warn_long_long
&& ((!flag_isoc99
&& pedantic
) || warn_traditional
);
1338 /* If we're generating preprocessor output, emit current directory
1339 if explicitly requested or if debugging information is enabled.
1340 ??? Maybe we should only do it for debugging formats that
1341 actually output the current directory? */
1342 if (flag_working_directory
== -1)
1343 flag_working_directory
= (debug_info_level
!= DINFO_LEVEL_NONE
);
1344 cpp_opts
->working_directory
1345 = flag_preprocess_only
&& flag_working_directory
;
1348 /* Add include path with a prefix at the front of its name. */
1350 add_prefixed_path (const char *suffix
, size_t chain
)
1354 size_t prefix_len
, suffix_len
;
1356 suffix_len
= strlen (suffix
);
1357 prefix
= iprefix
? iprefix
: cpp_GCC_INCLUDE_DIR
;
1358 prefix_len
= iprefix
? strlen (iprefix
) : cpp_GCC_INCLUDE_DIR_len
;
1360 path
= xmalloc (prefix_len
+ suffix_len
+ 1);
1361 memcpy (path
, prefix
, prefix_len
);
1362 memcpy (path
+ prefix_len
, suffix
, suffix_len
);
1363 path
[prefix_len
+ suffix_len
] = '\0';
1365 add_path (path
, chain
, 0);
1368 /* Handle -D, -U, -A, -imacros, and the first -include.
1369 TIF is the input file to which we will return after processing all
1372 finish_options (const char *tif
)
1374 if (!cpp_opts
->preprocessed
)
1378 cpp_change_file (parse_in
, LC_RENAME
, _("<built-in>"));
1379 cpp_init_builtins (parse_in
, flag_hosted
);
1380 c_cpp_builtins (parse_in
);
1382 /* We're about to send user input to cpplib, so make it warn for
1383 things that we previously (when we sent it internal definitions)
1384 told it to not warn.
1386 C99 permits implementation-defined characters in identifiers.
1387 The documented meaning of -std= is to turn off extensions that
1388 conflict with the specified standard, and since a strictly
1389 conforming program cannot contain a '$', we do not condition
1390 their acceptance on the -std= setting. */
1391 cpp_opts
->warn_dollars
= (cpp_opts
->pedantic
&& !cpp_opts
->c99
);
1393 cpp_change_file (parse_in
, LC_RENAME
, _("<command line>"));
1394 for (i
= 0; i
< deferred_count
; i
++)
1396 struct deferred_opt
*opt
= &deferred_opts
[i
];
1398 if (opt
->code
== OPT_D
)
1399 cpp_define (parse_in
, opt
->arg
);
1400 else if (opt
->code
== OPT_U
)
1401 cpp_undef (parse_in
, opt
->arg
);
1402 else if (opt
->code
== OPT_A
)
1404 if (opt
->arg
[0] == '-')
1405 cpp_unassert (parse_in
, opt
->arg
+ 1);
1407 cpp_assert (parse_in
, opt
->arg
);
1411 /* Handle -imacros after -D and -U. */
1412 for (i
= 0; i
< deferred_count
; i
++)
1414 struct deferred_opt
*opt
= &deferred_opts
[i
];
1416 if (opt
->code
== OPT_imacros
1417 && cpp_push_include (parse_in
, opt
->arg
))
1418 cpp_scan_nooutput (parse_in
);
1423 this_input_filename
= tif
;
1424 push_command_line_include ();
1427 /* Give CPP the next file given by -include, if any. */
1429 push_command_line_include (void)
1431 if (cpp_opts
->preprocessed
)
1434 while (include_cursor
< deferred_count
)
1436 struct deferred_opt
*opt
= &deferred_opts
[include_cursor
++];
1438 if (opt
->code
== OPT_include
&& cpp_push_include (parse_in
, opt
->arg
))
1442 if (include_cursor
== deferred_count
)
1444 /* Restore the line map from <command line>. */
1445 cpp_change_file (parse_in
, LC_RENAME
, this_input_filename
);
1446 /* -Wunused-macros should only warn about macros defined hereafter. */
1447 cpp_opts
->warn_unused_macros
= warn_unused_macros
;
1452 /* File change callback. Has to handle -include files. */
1454 cb_file_change (cpp_reader
*pfile ATTRIBUTE_UNUSED
,
1455 const struct line_map
*new_map
)
1457 if (flag_preprocess_only
)
1458 pp_file_change (new_map
);
1460 fe_file_change (new_map
);
1462 if (new_map
->reason
== LC_LEAVE
&& MAIN_FILE_P (new_map
))
1463 push_command_line_include ();
1466 /* Set the C 89 standard (with 1994 amendments if C94, without GNU
1467 extensions if ISO). There is no concept of gnu94. */
1469 set_std_c89 (int c94
, int iso
)
1471 cpp_set_lang (parse_in
, c94
? CLK_STDC94
: iso
? CLK_STDC89
: CLK_GNUC89
);
1474 flag_no_gnu_keywords
= iso
;
1475 flag_no_nonansi_builtin
= iso
;
1478 flag_writable_strings
= 0;
1481 /* Set the C 99 standard (without GNU extensions if ISO). */
1483 set_std_c99 (int iso
)
1485 cpp_set_lang (parse_in
, iso
? CLK_STDC99
: CLK_GNUC99
);
1487 flag_no_nonansi_builtin
= iso
;
1491 flag_writable_strings
= 0;
1494 /* Set the C++ 98 standard (without GNU extensions if ISO). */
1496 set_std_cxx98 (int iso
)
1498 cpp_set_lang (parse_in
, iso
? CLK_CXX98
: CLK_GNUCXX
);
1499 flag_no_gnu_keywords
= iso
;
1500 flag_no_nonansi_builtin
= iso
;
1504 /* Handle setting implicit to ON. */
1506 set_Wimplicit (int on
)
1509 warn_implicit_int
= on
;
1512 if (mesg_implicit_function_declaration
!= 2)
1513 mesg_implicit_function_declaration
= 1;
1516 mesg_implicit_function_declaration
= 0;
1519 /* Args to -d specify what to dump. Silently ignore
1520 unrecognized options; they may be aimed at toplev.c. */
1522 handle_OPT_d (const char *arg
)
1526 while ((c
= *arg
++) != '\0')
1529 case 'M': /* Dump macros only. */
1530 case 'N': /* Dump names. */
1531 case 'D': /* Dump definitions. */
1532 flag_dump_macros
= c
;
1536 flag_dump_includes
= 1;