1 /* C/ObjC/C++ command line option handling.
2 Copyright (C) 2002, 2003, 2004, 2005, 2006 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, 51 Franklin Street, Fifth Floor, 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 /* If -lang-fortran seen. */
74 static bool lang_fortran
= false;
76 /* Dependency output file. */
77 static const char *deps_file
;
79 /* The prefix given by -iprefix, if any. */
80 static const char *iprefix
;
82 /* The multilib directory given by -imultilib, if any. */
83 static const char *imultilib
;
85 /* The system root, if any. Overridden by -isysroot. */
86 static const char *sysroot
= TARGET_SYSTEM_ROOT
;
88 /* Zero disables all standard directories for headers. */
89 static bool std_inc
= true;
91 /* Zero disables the C++-specific standard directories for headers. */
92 static bool std_cxx_inc
= true;
94 /* If the quote chain has been split by -I-. */
95 static bool quote_chain_split
;
97 /* If -Wunused-macros. */
98 static bool warn_unused_macros
;
100 /* If -Wvariadic-macros. */
101 static bool warn_variadic_macros
= true;
103 /* Number of deferred options. */
104 static size_t deferred_count
;
106 /* Number of deferred options scanned for -include. */
107 static size_t include_cursor
;
109 static void set_Wimplicit (int);
110 static void handle_OPT_d (const char *);
111 static void set_std_cxx98 (int);
112 static void set_std_c89 (int, int);
113 static void set_std_c99 (int);
114 static void check_deps_environment_vars (void);
115 static void handle_deferred_opts (void);
116 static void sanitize_cpp_opts (void);
117 static void add_prefixed_path (const char *, size_t);
118 static void push_command_line_include (void);
119 static void cb_file_change (cpp_reader
*, const struct line_map
*);
120 static void cb_dir_change (cpp_reader
*, const char *);
121 static void finish_options (void);
123 #ifndef STDC_0_IN_SYSTEM_HEADERS
124 #define STDC_0_IN_SYSTEM_HEADERS 0
127 /* Holds switches parsed by c_common_handle_option (), but whose
128 handling is deferred to c_common_post_options (). */
129 static void defer_opt (enum opt_code
, const char *);
130 static struct deferred_opt
136 /* Complain that switch CODE expects an argument but none was
137 provided. OPT was the command-line option. Return FALSE to get
138 the default message in opts.c, TRUE if we provide a specialized
141 c_common_missing_argument (const char *opt
, size_t code
)
146 /* Pick up the default message. */
149 case OPT_fconstant_string_class_
:
150 error ("no class name specified with %qs", opt
);
154 error ("assertion missing after %qs", opt
);
159 error ("macro name missing after %qs", opt
);
168 error ("missing path after %qs", opt
);
177 error ("missing filename after %qs", opt
);
182 error ("missing makefile target after %qs", opt
);
189 /* Defer option CODE with argument ARG. */
191 defer_opt (enum opt_code code
, const char *arg
)
193 deferred_opts
[deferred_count
].code
= code
;
194 deferred_opts
[deferred_count
].arg
= arg
;
198 /* Common initialization before parsing options. */
200 c_common_init_options (unsigned int argc
, const char **argv
)
202 static const unsigned int lang_flags
[] = {CL_C
, CL_ObjC
, CL_CXX
, CL_ObjCXX
};
203 unsigned int i
, result
;
205 /* This is conditionalized only because that is the way the front
206 ends used to do it. Maybe this should be unconditional? */
207 if (c_dialect_cxx ())
209 /* By default wrap lines at 80 characters. Is getenv
210 ("COLUMNS") preferable? */
211 diagnostic_line_cutoff (global_dc
) = 80;
212 /* By default, emit location information once for every
213 diagnostic message. */
214 diagnostic_prefixing_rule (global_dc
) = DIAGNOSTICS_SHOW_PREFIX_ONCE
;
217 parse_in
= cpp_create_reader (c_dialect_cxx () ? CLK_GNUCXX
: CLK_GNUC89
,
218 ident_hash
, &line_table
);
220 cpp_opts
= cpp_get_options (parse_in
);
221 cpp_opts
->dollars_in_ident
= DOLLARS_IN_IDENTIFIERS
;
222 cpp_opts
->objc
= c_dialect_objc ();
224 /* Reset to avoid warnings on internal definitions. We set it just
225 before passing on command-line options to cpplib. */
226 cpp_opts
->warn_dollars
= 0;
228 flag_const_strings
= c_dialect_cxx ();
229 flag_exceptions
= c_dialect_cxx ();
230 warn_pointer_arith
= c_dialect_cxx ();
232 deferred_opts
= XNEWVEC (struct deferred_opt
, argc
);
234 result
= lang_flags
[c_language
];
236 if (c_language
== clk_c
)
238 /* If preprocessing assembly language, accept any of the C-family
239 front end options since the driver may pass them through. */
240 for (i
= 1; i
< argc
; i
++)
241 if (! strcmp (argv
[i
], "-lang-asm"))
243 result
|= CL_C
| CL_ObjC
| CL_CXX
| CL_ObjCXX
;
248 for (i
= 1; i
< argc
; i
++)
249 if (! strcmp (argv
[i
], "-lang-fortran"))
251 result
|= CL_Fortran
;
260 /* Handle switch SCODE with argument ARG. VALUE is true, unless no-
261 form of an -f or -W option was given. Returns 0 if the switch was
262 invalid, a negative number to prevent language-independent
263 processing in toplev.c (a hack necessary for the short-term). */
265 c_common_handle_option (size_t scode
, const char *arg
, int value
)
267 const struct cl_option
*option
= &cl_options
[scode
];
268 enum opt_code code
= (enum opt_code
) scode
;
274 if (cl_options
[code
].flags
& (CL_C
| CL_CXX
| CL_ObjC
| CL_ObjCXX
))
277 if (lang_fortran
&& (cl_options
[code
].flags
& (CL_Fortran
)))
283 case OPT__output_pch_
:
288 defer_opt (code
, arg
);
292 cpp_opts
->discard_comments
= 0;
296 cpp_opts
->discard_comments
= 0;
297 cpp_opts
->discard_comments_in_macro_exp
= 0;
301 defer_opt (code
, arg
);
305 flag_preprocess_only
= 1;
309 cpp_opts
->print_include_names
= 1;
313 TARGET_OPTF (xstrdup (arg
));
317 if (strcmp (arg
, "-"))
318 add_path (xstrdup (arg
), BRACKET
, 0, true);
321 if (quote_chain_split
)
322 error ("-I- specified twice");
323 quote_chain_split
= true;
324 split_quote_chain ();
325 inform ("obsolete option -I- used, please use -iquote instead");
331 /* When doing dependencies with -M or -MM, suppress normal
332 preprocessed output, but still do -dM etc. as software
333 depends on this. Preprocessed output does occur if -MD, -MMD
334 or environment var dependency generation is used. */
335 cpp_opts
->deps
.style
= (code
== OPT_M
? DEPS_SYSTEM
: DEPS_USER
);
337 cpp_opts
->inhibit_warnings
= 1;
342 cpp_opts
->deps
.style
= (code
== OPT_MD
? DEPS_SYSTEM
: DEPS_USER
);
353 cpp_opts
->deps
.missing_files
= true;
358 cpp_opts
->deps
.phony_targets
= true;
364 defer_opt (code
, arg
);
368 flag_no_line_commands
= 1;
371 case OPT_fworking_directory
:
372 flag_working_directory
= value
;
376 defer_opt (code
, arg
);
382 set_Wimplicit (value
);
383 warn_char_subscripts
= value
;
384 warn_missing_braces
= value
;
385 warn_parentheses
= value
;
386 warn_return_type
= value
;
387 warn_sequence_point
= value
; /* Was C only. */
388 if (c_dialect_cxx ())
389 warn_sign_compare
= value
;
391 warn_strict_aliasing
= value
;
392 warn_string_literal_comparison
= value
;
393 warn_always_true
= value
;
395 /* Only warn about unknown pragmas that are not in system
397 warn_unknown_pragmas
= value
;
399 /* We save the value of warn_uninitialized, since if they put
400 -Wuninitialized on the command line, we need to generate a
401 warning about not using it without also specifying -O. */
402 if (warn_uninitialized
!= 1)
403 warn_uninitialized
= (value
? 2 : 0);
405 if (!c_dialect_cxx ())
406 /* We set this to 2 here, but 1 in -Wmain, so -ffreestanding
407 can turn it off only if it's not explicit. */
408 warn_main
= value
* 2;
411 /* C++-specific warnings. */
412 warn_reorder
= value
;
413 warn_nontemplate_friend
= value
;
416 cpp_opts
->warn_trigraphs
= value
;
417 cpp_opts
->warn_comments
= value
;
418 cpp_opts
->warn_num_sign_change
= value
;
419 cpp_opts
->warn_multichar
= value
; /* Was C++ only. */
421 if (warn_pointer_sign
== -1)
422 warn_pointer_sign
= 1;
427 cpp_opts
->warn_comments
= value
;
430 case OPT_Wdeprecated
:
431 cpp_opts
->warn_deprecated
= value
;
434 case OPT_Wdiv_by_zero
:
435 warn_div_by_zero
= value
;
438 case OPT_Wendif_labels
:
439 cpp_opts
->warn_endif_labels
= value
;
443 cpp_opts
->warnings_are_errors
= value
;
444 global_dc
->warning_as_error_requested
= value
;
447 case OPT_Werror_implicit_function_declaration
:
448 mesg_implicit_function_declaration
= 2;
456 set_Wformat (atoi (arg
));
460 set_Wimplicit (value
);
464 /* Silently ignore for now. */
467 case OPT_Winvalid_pch
:
468 cpp_opts
->warn_invalid_pch
= value
;
478 case OPT_Wmissing_include_dirs
:
479 cpp_opts
->warn_missing_include_dirs
= value
;
483 cpp_opts
->warn_multichar
= value
;
486 case OPT_Wnormalized_
:
487 if (!value
|| (arg
&& strcasecmp (arg
, "none") == 0))
488 cpp_opts
->warn_normalize
= normalized_none
;
489 else if (!arg
|| strcasecmp (arg
, "nfkc") == 0)
490 cpp_opts
->warn_normalize
= normalized_KC
;
491 else if (strcasecmp (arg
, "id") == 0)
492 cpp_opts
->warn_normalize
= normalized_identifier_C
;
493 else if (strcasecmp (arg
, "nfc") == 0)
494 cpp_opts
->warn_normalize
= normalized_C
;
496 error ("argument %qs to %<-Wnormalized%> not recognized", arg
);
499 case OPT_Wreturn_type
:
500 warn_return_type
= value
;
503 case OPT_Wstrict_null_sentinel
:
504 warn_strict_null_sentinel
= value
;
507 case OPT_Wsystem_headers
:
508 cpp_opts
->warn_system_headers
= value
;
511 case OPT_Wtraditional
:
512 cpp_opts
->warn_traditional
= value
;
516 cpp_opts
->warn_trigraphs
= value
;
520 cpp_opts
->warn_undef
= value
;
523 case OPT_Wunknown_pragmas
:
524 /* Set to greater than 1, so that even unknown pragmas in
525 system headers will be warned about. */
526 warn_unknown_pragmas
= value
* 2;
529 case OPT_Wunused_macros
:
530 warn_unused_macros
= value
;
533 case OPT_Wvariadic_macros
:
534 warn_variadic_macros
= value
;
537 case OPT_Wwrite_strings
:
538 if (!c_dialect_cxx ())
539 flag_const_strings
= value
;
541 warn_write_strings
= value
;
547 warn_nonvdtor
= true;
551 if (!c_dialect_cxx ())
552 set_std_c89 (false, true);
554 set_std_cxx98 (true);
561 case OPT_fcond_mismatch
:
562 if (!c_dialect_cxx ())
564 flag_cond_mismatch
= value
;
569 case OPT_fall_virtual
:
570 case OPT_falt_external_templates
:
571 case OPT_fenum_int_equiv
:
572 case OPT_fexternal_templates
:
573 case OPT_fguiding_decls
:
575 case OPT_fhuge_objects
:
577 case OPT_fname_mangling_version_
:
579 case OPT_fnonnull_objects
:
581 case OPT_fstrict_prototype
:
582 case OPT_fthis_is_variable
:
583 case OPT_fvtable_thunks
:
586 warning (0, "switch %qs is no longer supported", option
->opt_text
);
589 case OPT_faccess_control
:
590 flag_access_control
= value
;
594 flag_no_asm
= !value
;
598 flag_no_builtin
= !value
;
605 disable_builtin_function (arg
);
608 case OPT_fdollars_in_identifiers
:
609 cpp_opts
->dollars_in_ident
= value
;
612 case OPT_ffreestanding
:
614 /* Fall through.... */
617 flag_no_builtin
= !value
;
618 /* warn_main will be 2 if set by -Wall, 1 if set by -Wmain */
619 if (!value
&& warn_main
== 2)
623 case OPT_fshort_double
:
624 flag_short_double
= value
;
627 case OPT_fshort_enums
:
628 flag_short_enums
= value
;
631 case OPT_fshort_wchar
:
632 flag_short_wchar
= value
;
635 case OPT_fsigned_bitfields
:
636 flag_signed_bitfields
= value
;
639 case OPT_fsigned_char
:
640 flag_signed_char
= value
;
643 case OPT_funsigned_bitfields
:
644 flag_signed_bitfields
= !value
;
647 case OPT_funsigned_char
:
648 flag_signed_char
= !value
;
652 flag_check_new
= value
;
655 case OPT_fconserve_space
:
656 flag_conserve_space
= value
;
659 case OPT_fconst_strings
:
660 flag_const_strings
= value
;
663 case OPT_fconstant_string_class_
:
664 constant_string_class_name
= arg
;
667 case OPT_fdefault_inline
:
668 flag_default_inline
= value
;
671 case OPT_felide_constructors
:
672 flag_elide_constructors
= value
;
675 case OPT_fenforce_eh_specs
:
676 flag_enforce_eh_specs
= value
;
679 case OPT_fextended_identifiers
:
680 cpp_opts
->extended_identifiers
= value
;
684 flag_new_for_scope
= value
;
687 case OPT_fgnu_keywords
:
688 flag_no_gnu_keywords
= !value
;
691 case OPT_fgnu_runtime
:
692 flag_next_runtime
= !value
;
695 case OPT_fhandle_exceptions
:
696 warning (0, "-fhandle-exceptions has been renamed -fexceptions (and is now on by default)");
697 flag_exceptions
= value
;
700 case OPT_fimplement_inlines
:
701 flag_implement_inlines
= value
;
704 case OPT_fimplicit_inline_templates
:
705 flag_implicit_inline_templates
= value
;
708 case OPT_fimplicit_templates
:
709 flag_implicit_templates
= value
;
712 case OPT_fms_extensions
:
713 flag_ms_extensions
= value
;
716 case OPT_fnext_runtime
:
717 flag_next_runtime
= value
;
720 case OPT_fnil_receivers
:
721 flag_nil_receivers
= value
;
724 case OPT_fnonansi_builtins
:
725 flag_no_nonansi_builtin
= !value
;
728 case OPT_foperator_names
:
729 cpp_opts
->operator_names
= value
;
732 case OPT_foptional_diags
:
733 flag_optional_diags
= value
;
737 cpp_opts
->restore_pch_deps
= value
;
740 case OPT_fpch_preprocess
:
741 flag_pch_preprocess
= value
;
744 case OPT_fpermissive
:
745 flag_permissive
= value
;
748 case OPT_fpreprocessed
:
749 cpp_opts
->preprocessed
= value
;
752 case OPT_freplace_objc_classes
:
753 flag_replace_objc_classes
= value
;
757 flag_use_repository
= value
;
759 flag_implicit_templates
= 0;
766 case OPT_fshow_column
:
767 cpp_opts
->show_column
= value
;
771 flag_detailed_statistics
= value
;
775 /* It is documented that we silently ignore silly values. */
776 if (value
>= 1 && value
<= 100)
777 cpp_opts
->tabstop
= value
;
780 case OPT_fexec_charset_
:
781 cpp_opts
->narrow_charset
= arg
;
784 case OPT_fwide_exec_charset_
:
785 cpp_opts
->wide_charset
= arg
;
788 case OPT_finput_charset_
:
789 cpp_opts
->input_charset
= arg
;
792 case OPT_ftemplate_depth_
:
793 max_tinst_depth
= value
;
796 case OPT_fuse_cxa_atexit
:
797 flag_use_cxa_atexit
= value
;
800 case OPT_fvisibility_inlines_hidden
:
801 visibility_options
.inlines_hidden
= value
;
808 case OPT_fthreadsafe_statics
:
809 flag_threadsafe_statics
= value
;
813 flag_zero_link
= value
;
817 flag_gen_declaration
= 1;
821 add_path (xstrdup (arg
), AFTER
, 0, true);
826 defer_opt (code
, arg
);
838 add_path (xstrdup (arg
), QUOTE
, 0, true);
846 add_path (xstrdup (arg
), SYSTEM
, 0, true);
849 case OPT_iwithprefix
:
850 add_prefixed_path (arg
, SYSTEM
);
853 case OPT_iwithprefixbefore
:
854 add_prefixed_path (arg
, BRACKET
);
858 cpp_set_lang (parse_in
, CLK_ASM
);
859 cpp_opts
->dollars_in_ident
= false;
862 case OPT_lang_fortran
:
882 error ("output filename specified twice");
885 /* We need to handle the -pedantic switches here, rather than in
886 c_common_post_options, so that a subsequent -Wno-endif-labels
887 is not overridden. */
888 case OPT_pedantic_errors
:
889 cpp_opts
->pedantic_errors
= 1;
892 cpp_opts
->pedantic
= 1;
893 cpp_opts
->warn_endif_labels
= 1;
894 if (warn_pointer_sign
== -1)
895 warn_pointer_sign
= 1;
898 case OPT_print_objc_runtime_info
:
899 print_struct_values
= 1;
902 case OPT_print_pch_checksum
:
903 c_common_print_pch_checksum (stdout
);
904 exit_after_options
= true;
912 case OPT_std_gnu__98
:
913 set_std_cxx98 (code
== OPT_std_c__98
/* ISO */);
917 case OPT_std_iso9899_1990
:
918 case OPT_std_iso9899_199409
:
919 set_std_c89 (code
== OPT_std_iso9899_199409
/* c94 */, true /* ISO */);
923 set_std_c89 (false /* c94 */, false /* ISO */);
928 case OPT_std_iso9899_1999
:
929 case OPT_std_iso9899_199x
:
930 set_std_c99 (true /* ISO */);
935 set_std_c99 (false /* ISO */);
939 cpp_opts
->trigraphs
= 1;
942 case OPT_traditional_cpp
:
943 cpp_opts
->traditional
= 1;
951 cpp_opts
->inhibit_warnings
= 1;
962 /* Post-switch processing. */
964 c_common_post_options (const char **pfilename
)
966 struct cpp_callbacks
*cb
;
968 /* Canonicalize the input and output filenames. */
969 if (in_fnames
== NULL
)
971 in_fnames
= XNEWVEC (const char *, 1);
974 else if (strcmp (in_fnames
[0], "-") == 0)
977 if (out_fname
== NULL
|| !strcmp (out_fname
, "-"))
980 if (cpp_opts
->deps
.style
== DEPS_NONE
)
981 check_deps_environment_vars ();
983 handle_deferred_opts ();
985 sanitize_cpp_opts ();
987 register_include_chains (parse_in
, sysroot
, iprefix
, imultilib
,
988 std_inc
, std_cxx_inc
&& c_dialect_cxx (), verbose
);
990 flag_inline_trees
= 1;
992 /* Use tree inlining. */
995 if (flag_inline_functions
)
996 flag_inline_trees
= 2;
998 /* If we are given more than one input file, we must use
999 unit-at-a-time mode. */
1000 if (num_in_fnames
> 1)
1001 flag_unit_at_a_time
= 1;
1003 /* Default to ObjC sjlj exception handling if NeXT runtime. */
1004 if (flag_objc_sjlj_exceptions
< 0)
1005 flag_objc_sjlj_exceptions
= flag_next_runtime
;
1006 if (flag_objc_exceptions
&& !flag_objc_sjlj_exceptions
)
1007 flag_exceptions
= 1;
1009 /* -Wextra implies -Wsign-compare and -Wmissing-field-initializers,
1010 but not if explicitly overridden. */
1011 if (warn_sign_compare
== -1)
1012 warn_sign_compare
= extra_warnings
;
1013 if (warn_missing_field_initializers
== -1)
1014 warn_missing_field_initializers
= extra_warnings
;
1016 /* -Wpointer_sign is disabled by default, but it is enabled if any
1017 of -Wall or -pedantic are given. */
1018 if (warn_pointer_sign
== -1)
1019 warn_pointer_sign
= 0;
1021 /* Special format checking options don't work without -Wformat; warn if
1025 warning (OPT_Wformat_y2k
,
1026 "-Wformat-y2k ignored without -Wformat");
1027 warning (OPT_Wformat_extra_args
,
1028 "-Wformat-extra-args ignored without -Wformat");
1029 warning (OPT_Wformat_zero_length
,
1030 "-Wformat-zero-length ignored without -Wformat");
1031 warning (OPT_Wformat_nonliteral
,
1032 "-Wformat-nonliteral ignored without -Wformat");
1033 warning (OPT_Wformat_security
,
1034 "-Wformat-security ignored without -Wformat");
1037 /* C99 requires special handling of complex multiplication and division;
1038 -ffast-math and -fcx-limited-range are handled in process_options. */
1040 flag_complex_method
= 2;
1042 if (flag_preprocess_only
)
1044 /* Open the output now. We must do so even if flag_no_output is
1045 on, because there may be other output than from the actual
1046 preprocessing (e.g. from -dM). */
1047 if (out_fname
[0] == '\0')
1048 out_stream
= stdout
;
1050 out_stream
= fopen (out_fname
, "w");
1052 if (out_stream
== NULL
)
1054 fatal_error ("opening output file %s: %m", out_fname
);
1058 if (num_in_fnames
> 1)
1059 error ("too many filenames given. Type %s --help for usage",
1062 init_pp_output (out_stream
);
1068 /* Yuk. WTF is this? I do know ObjC relies on it somewhere. */
1069 input_location
= UNKNOWN_LOCATION
;
1072 cb
= cpp_get_callbacks (parse_in
);
1073 cb
->file_change
= cb_file_change
;
1074 cb
->dir_change
= cb_dir_change
;
1075 cpp_post_options (parse_in
);
1077 input_location
= UNKNOWN_LOCATION
;
1079 /* If an error has occurred in cpplib, note it so we fail
1081 errorcount
+= cpp_errors (parse_in
);
1083 *pfilename
= this_input_filename
1084 = cpp_read_main_file (parse_in
, in_fnames
[0]);
1085 /* Don't do any compilation or preprocessing if there is no input file. */
1086 if (this_input_filename
== NULL
)
1092 if (flag_working_directory
1093 && flag_preprocess_only
&& !flag_no_line_commands
)
1094 pp_dir_change (parse_in
, get_src_pwd ());
1096 return flag_preprocess_only
;
1099 /* Front end initialization common to C, ObjC and C++. */
1101 c_common_init (void)
1103 /* Set up preprocessor arithmetic. Must be done after call to
1104 c_common_nodes_and_builtins for type nodes to be good. */
1105 cpp_opts
->precision
= TYPE_PRECISION (intmax_type_node
);
1106 cpp_opts
->char_precision
= TYPE_PRECISION (char_type_node
);
1107 cpp_opts
->int_precision
= TYPE_PRECISION (integer_type_node
);
1108 cpp_opts
->wchar_precision
= TYPE_PRECISION (wchar_type_node
);
1109 cpp_opts
->unsigned_wchar
= TYPE_UNSIGNED (wchar_type_node
);
1110 cpp_opts
->bytes_big_endian
= BYTES_BIG_ENDIAN
;
1112 /* This can't happen until after wchar_precision and bytes_big_endian
1114 cpp_init_iconv (parse_in
);
1117 c_common_print_pch_checksum (stderr
);
1119 if (flag_preprocess_only
)
1122 preprocess_file (parse_in
);
1126 /* Has to wait until now so that cpplib has its hash table. */
1132 /* Initialize the integrated preprocessor after debug output has been
1133 initialized; loop over each input file. */
1135 c_common_parse_file (int set_yydebug
)
1139 /* Enable parser debugging, if requested and we can. If requested
1140 and we can't, notify the user. */
1142 yydebug
= set_yydebug
;
1145 warning (0, "YYDEBUG was not defined at build time, -dy ignored");
1151 /* Start the main input file, if the debug writer wants it. */
1152 if (debug_hooks
->start_end_main_source_file
)
1153 (*debug_hooks
->start_source_file
) (0, this_input_filename
);
1160 /* And end the main input file, if the debug writer wants it */
1161 if (debug_hooks
->start_end_main_source_file
)
1162 (*debug_hooks
->end_source_file
) (0);
1163 if (++i
>= num_in_fnames
)
1165 cpp_undef_all (parse_in
);
1167 = cpp_read_main_file (parse_in
, in_fnames
[i
]);
1168 /* If an input file is missing, abandon further compilation.
1169 cpplib has issued a diagnostic. */
1170 if (!this_input_filename
)
1175 /* Common finish hook for the C, ObjC and C++ front ends. */
1177 c_common_finish (void)
1179 FILE *deps_stream
= NULL
;
1181 if (cpp_opts
->deps
.style
!= DEPS_NONE
)
1183 /* If -M or -MM was seen without -MF, default output to the
1186 deps_stream
= out_stream
;
1189 deps_stream
= fopen (deps_file
, deps_append
? "a": "w");
1191 fatal_error ("opening dependency file %s: %m", deps_file
);
1195 /* For performance, avoid tearing down cpplib's internal structures
1196 with cpp_destroy (). */
1197 errorcount
+= cpp_finish (parse_in
, deps_stream
);
1199 if (deps_stream
&& deps_stream
!= out_stream
1200 && (ferror (deps_stream
) || fclose (deps_stream
)))
1201 fatal_error ("closing dependency file %s: %m", deps_file
);
1203 if (out_stream
&& (ferror (out_stream
) || fclose (out_stream
)))
1204 fatal_error ("when writing output to %s: %m", out_fname
);
1207 /* Either of two environment variables can specify output of
1208 dependencies. Their value is either "OUTPUT_FILE" or "OUTPUT_FILE
1209 DEPS_TARGET", where OUTPUT_FILE is the file to write deps info to
1210 and DEPS_TARGET is the target to mention in the deps. They also
1211 result in dependency information being appended to the output file
1212 rather than overwriting it, and like Sun's compiler
1213 SUNPRO_DEPENDENCIES suppresses the dependency on the main file. */
1215 check_deps_environment_vars (void)
1219 GET_ENVIRONMENT (spec
, "DEPENDENCIES_OUTPUT");
1221 cpp_opts
->deps
.style
= DEPS_USER
;
1224 GET_ENVIRONMENT (spec
, "SUNPRO_DEPENDENCIES");
1227 cpp_opts
->deps
.style
= DEPS_SYSTEM
;
1228 cpp_opts
->deps
.ignore_main_file
= true;
1234 /* Find the space before the DEPS_TARGET, if there is one. */
1235 char *s
= strchr (spec
, ' ');
1238 /* Let the caller perform MAKE quoting. */
1239 defer_opt (OPT_MT
, s
+ 1);
1243 /* Command line -MF overrides environment variables and default. */
1252 /* Handle deferred command line switches. */
1254 handle_deferred_opts (void)
1259 /* Avoid allocating the deps buffer if we don't need it.
1260 (This flag may be true without there having been -MT or -MQ
1261 options, but we'll still need the deps buffer.) */
1265 deps
= cpp_get_deps (parse_in
);
1267 for (i
= 0; i
< deferred_count
; i
++)
1269 struct deferred_opt
*opt
= &deferred_opts
[i
];
1271 if (opt
->code
== OPT_MT
|| opt
->code
== OPT_MQ
)
1272 deps_add_target (deps
, opt
->arg
, opt
->code
== OPT_MQ
);
1276 /* These settings are appropriate for GCC, but not necessarily so for
1277 cpplib as a library. */
1279 sanitize_cpp_opts (void)
1281 /* If we don't know what style of dependencies to output, complain
1282 if any other dependency switches have been given. */
1283 if (deps_seen
&& cpp_opts
->deps
.style
== DEPS_NONE
)
1284 error ("to generate dependencies you must specify either -M or -MM");
1286 /* -dM and dependencies suppress normal output; do it here so that
1287 the last -d[MDN] switch overrides earlier ones. */
1288 if (flag_dump_macros
== 'M')
1291 /* Disable -dD, -dN and -dI if normal output is suppressed. Allow
1292 -dM since at least glibc relies on -M -dM to work. */
1293 /* Also, flag_no_output implies flag_no_line_commands, always. */
1296 if (flag_dump_macros
!= 'M')
1297 flag_dump_macros
= 0;
1298 flag_dump_includes
= 0;
1299 flag_no_line_commands
= 1;
1302 cpp_opts
->unsigned_char
= !flag_signed_char
;
1303 cpp_opts
->stdc_0_in_system_headers
= STDC_0_IN_SYSTEM_HEADERS
;
1305 /* We want -Wno-long-long to override -pedantic -std=non-c99
1306 and/or -Wtraditional, whatever the ordering. */
1307 cpp_opts
->warn_long_long
1308 = warn_long_long
&& ((!flag_isoc99
&& pedantic
) || warn_traditional
);
1310 /* Similarly with -Wno-variadic-macros. No check for c99 here, since
1311 this also turns off warnings about GCCs extension. */
1312 cpp_opts
->warn_variadic_macros
1313 = warn_variadic_macros
&& (pedantic
|| warn_traditional
);
1315 /* If we're generating preprocessor output, emit current directory
1316 if explicitly requested or if debugging information is enabled.
1317 ??? Maybe we should only do it for debugging formats that
1318 actually output the current directory? */
1319 if (flag_working_directory
== -1)
1320 flag_working_directory
= (debug_info_level
!= DINFO_LEVEL_NONE
);
1323 /* Add include path with a prefix at the front of its name. */
1325 add_prefixed_path (const char *suffix
, size_t chain
)
1329 size_t prefix_len
, suffix_len
;
1331 suffix_len
= strlen (suffix
);
1332 prefix
= iprefix
? iprefix
: cpp_GCC_INCLUDE_DIR
;
1333 prefix_len
= iprefix
? strlen (iprefix
) : cpp_GCC_INCLUDE_DIR_len
;
1335 path
= (char *) xmalloc (prefix_len
+ suffix_len
+ 1);
1336 memcpy (path
, prefix
, prefix_len
);
1337 memcpy (path
+ prefix_len
, suffix
, suffix_len
);
1338 path
[prefix_len
+ suffix_len
] = '\0';
1340 add_path (path
, chain
, 0, false);
1343 /* Handle -D, -U, -A, -imacros, and the first -include. */
1345 finish_options (void)
1347 if (!cpp_opts
->preprocessed
)
1351 cb_file_change (parse_in
,
1352 linemap_add (&line_table
, LC_RENAME
, 0,
1353 _("<built-in>"), 0));
1355 cpp_init_builtins (parse_in
, flag_hosted
);
1356 c_cpp_builtins (parse_in
);
1358 /* We're about to send user input to cpplib, so make it warn for
1359 things that we previously (when we sent it internal definitions)
1360 told it to not warn.
1362 C99 permits implementation-defined characters in identifiers.
1363 The documented meaning of -std= is to turn off extensions that
1364 conflict with the specified standard, and since a strictly
1365 conforming program cannot contain a '$', we do not condition
1366 their acceptance on the -std= setting. */
1367 cpp_opts
->warn_dollars
= (cpp_opts
->pedantic
&& !cpp_opts
->c99
);
1369 cpp_change_file (parse_in
, LC_RENAME
, _("<command line>"));
1370 for (i
= 0; i
< deferred_count
; i
++)
1372 struct deferred_opt
*opt
= &deferred_opts
[i
];
1374 if (opt
->code
== OPT_D
)
1375 cpp_define (parse_in
, opt
->arg
);
1376 else if (opt
->code
== OPT_U
)
1377 cpp_undef (parse_in
, opt
->arg
);
1378 else if (opt
->code
== OPT_A
)
1380 if (opt
->arg
[0] == '-')
1381 cpp_unassert (parse_in
, opt
->arg
+ 1);
1383 cpp_assert (parse_in
, opt
->arg
);
1387 /* Handle -imacros after -D and -U. */
1388 for (i
= 0; i
< deferred_count
; i
++)
1390 struct deferred_opt
*opt
= &deferred_opts
[i
];
1392 if (opt
->code
== OPT_imacros
1393 && cpp_push_include (parse_in
, opt
->arg
))
1395 /* Disable push_command_line_include callback for now. */
1396 include_cursor
= deferred_count
+ 1;
1397 cpp_scan_nooutput (parse_in
);
1403 push_command_line_include ();
1406 /* Give CPP the next file given by -include, if any. */
1408 push_command_line_include (void)
1410 while (include_cursor
< deferred_count
)
1412 struct deferred_opt
*opt
= &deferred_opts
[include_cursor
++];
1414 if (!cpp_opts
->preprocessed
&& opt
->code
== OPT_include
1415 && cpp_push_include (parse_in
, opt
->arg
))
1419 if (include_cursor
== deferred_count
)
1422 /* -Wunused-macros should only warn about macros defined hereafter. */
1423 cpp_opts
->warn_unused_macros
= warn_unused_macros
;
1424 /* Restore the line map from <command line>. */
1425 if (!cpp_opts
->preprocessed
)
1426 cpp_change_file (parse_in
, LC_RENAME
, this_input_filename
);
1428 /* Set this here so the client can change the option if it wishes,
1429 and after stacking the main file so we don't trace the main file. */
1430 line_table
.trace_includes
= cpp_opts
->print_include_names
;
1434 /* File change callback. Has to handle -include files. */
1436 cb_file_change (cpp_reader
* ARG_UNUSED (pfile
),
1437 const struct line_map
*new_map
)
1439 if (flag_preprocess_only
)
1440 pp_file_change (new_map
);
1442 fe_file_change (new_map
);
1444 if (new_map
== 0 || (new_map
->reason
== LC_LEAVE
&& MAIN_FILE_P (new_map
)))
1445 push_command_line_include ();
1449 cb_dir_change (cpp_reader
* ARG_UNUSED (pfile
), const char *dir
)
1451 if (!set_src_pwd (dir
))
1452 warning (0, "too late for # directive to set debug directory");
1455 /* Set the C 89 standard (with 1994 amendments if C94, without GNU
1456 extensions if ISO). There is no concept of gnu94. */
1458 set_std_c89 (int c94
, int iso
)
1460 cpp_set_lang (parse_in
, c94
? CLK_STDC94
: iso
? CLK_STDC89
: CLK_GNUC89
);
1463 flag_no_gnu_keywords
= iso
;
1464 flag_no_nonansi_builtin
= iso
;
1469 /* Set the C 99 standard (without GNU extensions if ISO). */
1471 set_std_c99 (int iso
)
1473 cpp_set_lang (parse_in
, iso
? CLK_STDC99
: CLK_GNUC99
);
1475 flag_no_nonansi_builtin
= iso
;
1481 /* Set the C++ 98 standard (without GNU extensions if ISO). */
1483 set_std_cxx98 (int iso
)
1485 cpp_set_lang (parse_in
, iso
? CLK_CXX98
: CLK_GNUCXX
);
1486 flag_no_gnu_keywords
= iso
;
1487 flag_no_nonansi_builtin
= iso
;
1491 /* Handle setting implicit to ON. */
1493 set_Wimplicit (int on
)
1496 warn_implicit_int
= on
;
1499 if (mesg_implicit_function_declaration
!= 2)
1500 mesg_implicit_function_declaration
= 1;
1503 mesg_implicit_function_declaration
= 0;
1506 /* Args to -d specify what to dump. Silently ignore
1507 unrecognized options; they may be aimed at toplev.c. */
1509 handle_OPT_d (const char *arg
)
1513 while ((c
= *arg
++) != '\0')
1516 case 'M': /* Dump macros only. */
1517 case 'N': /* Dump names. */
1518 case 'D': /* Dump definitions. */
1519 flag_dump_macros
= c
;
1523 flag_dump_includes
= 1;