1 /* C/ObjC/C++ command line option handling.
2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007
3 Free Software Foundation, Inc.
4 Contributed by Neil Booth.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
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_exceptions
= c_dialect_cxx ();
229 warn_pointer_arith
= c_dialect_cxx ();
230 warn_write_strings
= 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
;
271 /* Prevent resetting the language standard to a C dialect when the driver
272 has already determined that we're looking at assembler input. */
273 bool preprocessing_asm_p
= (cpp_get_options (parse_in
)->lang
== CLK_ASM
);
278 if (cl_options
[code
].flags
& (CL_C
| CL_CXX
| CL_ObjC
| CL_ObjCXX
))
281 if (lang_fortran
&& (cl_options
[code
].flags
& (CL_Fortran
)))
287 case OPT__output_pch_
:
292 defer_opt (code
, arg
);
296 cpp_opts
->discard_comments
= 0;
300 cpp_opts
->discard_comments
= 0;
301 cpp_opts
->discard_comments_in_macro_exp
= 0;
305 defer_opt (code
, arg
);
309 flag_preprocess_only
= 1;
313 cpp_opts
->print_include_names
= 1;
317 TARGET_OPTF (xstrdup (arg
));
321 if (strcmp (arg
, "-"))
322 add_path (xstrdup (arg
), BRACKET
, 0, true);
325 if (quote_chain_split
)
326 error ("-I- specified twice");
327 quote_chain_split
= true;
328 split_quote_chain ();
329 inform ("obsolete option -I- used, please use -iquote instead");
335 /* When doing dependencies with -M or -MM, suppress normal
336 preprocessed output, but still do -dM etc. as software
337 depends on this. Preprocessed output does occur if -MD, -MMD
338 or environment var dependency generation is used. */
339 cpp_opts
->deps
.style
= (code
== OPT_M
? DEPS_SYSTEM
: DEPS_USER
);
341 cpp_opts
->inhibit_warnings
= 1;
346 cpp_opts
->deps
.style
= (code
== OPT_MD
? DEPS_SYSTEM
: DEPS_USER
);
357 cpp_opts
->deps
.missing_files
= true;
362 cpp_opts
->deps
.phony_targets
= true;
368 defer_opt (code
, arg
);
372 flag_no_line_commands
= 1;
375 case OPT_fworking_directory
:
376 flag_working_directory
= value
;
380 defer_opt (code
, arg
);
386 set_Wimplicit (value
);
387 warn_char_subscripts
= value
;
388 warn_missing_braces
= value
;
389 warn_parentheses
= value
;
390 warn_return_type
= value
;
391 warn_sequence_point
= value
; /* Was C only. */
392 if (c_dialect_cxx ())
393 warn_sign_compare
= value
;
395 warn_strict_aliasing
= value
;
396 warn_strict_overflow
= value
;
397 warn_address
= value
;
399 /* Only warn about unknown pragmas that are not in system
401 warn_unknown_pragmas
= value
;
403 /* We save the value of warn_uninitialized, since if they put
404 -Wuninitialized on the command line, we need to generate a
405 warning about not using it without also specifying -O. */
406 if (warn_uninitialized
!= 1)
407 warn_uninitialized
= (value
? 2 : 0);
409 if (!c_dialect_cxx ())
410 /* We set this to 2 here, but 1 in -Wmain, so -ffreestanding
411 can turn it off only if it's not explicit. */
412 warn_main
= value
* 2;
415 /* C++-specific warnings. */
416 warn_reorder
= value
;
417 warn_nontemplate_friend
= value
;
420 cpp_opts
->warn_trigraphs
= value
;
421 cpp_opts
->warn_comments
= value
;
422 cpp_opts
->warn_num_sign_change
= value
;
423 cpp_opts
->warn_multichar
= value
; /* Was C++ only. */
425 if (warn_pointer_sign
== -1)
426 warn_pointer_sign
= 1;
431 cpp_opts
->warn_comments
= value
;
434 case OPT_Wdeprecated
:
435 cpp_opts
->warn_deprecated
= 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 warn_write_strings
= value
;
544 warn_nonvdtor
= true;
548 if (!c_dialect_cxx ())
549 set_std_c89 (false, true);
551 set_std_cxx98 (true);
558 case OPT_fcond_mismatch
:
559 if (!c_dialect_cxx ())
561 flag_cond_mismatch
= value
;
566 case OPT_fall_virtual
:
567 case OPT_falt_external_templates
:
568 case OPT_fenum_int_equiv
:
569 case OPT_fexternal_templates
:
570 case OPT_fguiding_decls
:
572 case OPT_fhuge_objects
:
574 case OPT_fname_mangling_version_
:
576 case OPT_fnonnull_objects
:
578 case OPT_fstrict_prototype
:
579 case OPT_fthis_is_variable
:
580 case OPT_fvtable_thunks
:
583 warning (0, "switch %qs is no longer supported", option
->opt_text
);
586 case OPT_faccess_control
:
587 flag_access_control
= value
;
591 flag_no_asm
= !value
;
595 flag_no_builtin
= !value
;
602 disable_builtin_function (arg
);
605 case OPT_fdollars_in_identifiers
:
606 cpp_opts
->dollars_in_ident
= value
;
609 case OPT_ffreestanding
:
611 /* Fall through.... */
614 flag_no_builtin
= !value
;
615 /* warn_main will be 2 if set by -Wall, 1 if set by -Wmain */
616 if (!value
&& warn_main
== 2)
620 case OPT_fshort_double
:
621 flag_short_double
= value
;
624 case OPT_fshort_enums
:
625 flag_short_enums
= value
;
628 case OPT_fshort_wchar
:
629 flag_short_wchar
= value
;
632 case OPT_fsigned_bitfields
:
633 flag_signed_bitfields
= value
;
636 case OPT_fsigned_char
:
637 flag_signed_char
= value
;
640 case OPT_funsigned_bitfields
:
641 flag_signed_bitfields
= !value
;
644 case OPT_funsigned_char
:
645 flag_signed_char
= !value
;
649 flag_check_new
= value
;
652 case OPT_fconserve_space
:
653 flag_conserve_space
= value
;
656 case OPT_fconstant_string_class_
:
657 constant_string_class_name
= arg
;
660 case OPT_fdefault_inline
:
661 flag_default_inline
= value
;
664 case OPT_felide_constructors
:
665 flag_elide_constructors
= value
;
668 case OPT_fenforce_eh_specs
:
669 flag_enforce_eh_specs
= value
;
672 case OPT_fextended_identifiers
:
673 cpp_opts
->extended_identifiers
= value
;
677 flag_new_for_scope
= value
;
680 case OPT_fgnu_keywords
:
681 flag_no_gnu_keywords
= !value
;
684 case OPT_fgnu_runtime
:
685 flag_next_runtime
= !value
;
688 case OPT_fhandle_exceptions
:
689 warning (0, "-fhandle-exceptions has been renamed -fexceptions (and is now on by default)");
690 flag_exceptions
= value
;
693 case OPT_fimplement_inlines
:
694 flag_implement_inlines
= value
;
697 case OPT_fimplicit_inline_templates
:
698 flag_implicit_inline_templates
= value
;
701 case OPT_fimplicit_templates
:
702 flag_implicit_templates
= value
;
705 case OPT_fms_extensions
:
706 flag_ms_extensions
= value
;
709 case OPT_fnext_runtime
:
710 flag_next_runtime
= value
;
713 case OPT_fnil_receivers
:
714 flag_nil_receivers
= value
;
717 case OPT_fnonansi_builtins
:
718 flag_no_nonansi_builtin
= !value
;
721 case OPT_foperator_names
:
722 cpp_opts
->operator_names
= value
;
725 case OPT_foptional_diags
:
726 flag_optional_diags
= value
;
730 cpp_opts
->restore_pch_deps
= value
;
733 case OPT_fpch_preprocess
:
734 flag_pch_preprocess
= value
;
737 case OPT_fpermissive
:
738 flag_permissive
= value
;
741 case OPT_fpreprocessed
:
742 cpp_opts
->preprocessed
= value
;
745 case OPT_freplace_objc_classes
:
746 flag_replace_objc_classes
= value
;
750 flag_use_repository
= value
;
752 flag_implicit_templates
= 0;
759 case OPT_fshow_column
:
760 cpp_opts
->show_column
= value
;
764 flag_detailed_statistics
= value
;
768 /* It is documented that we silently ignore silly values. */
769 if (value
>= 1 && value
<= 100)
770 cpp_opts
->tabstop
= value
;
773 case OPT_fexec_charset_
:
774 cpp_opts
->narrow_charset
= arg
;
777 case OPT_fwide_exec_charset_
:
778 cpp_opts
->wide_charset
= arg
;
781 case OPT_finput_charset_
:
782 cpp_opts
->input_charset
= arg
;
785 case OPT_ftemplate_depth_
:
786 max_tinst_depth
= value
;
789 case OPT_fuse_cxa_atexit
:
790 flag_use_cxa_atexit
= value
;
793 case OPT_fuse_cxa_get_exception_ptr
:
794 flag_use_cxa_get_exception_ptr
= value
;
797 case OPT_fvisibility_inlines_hidden
:
798 visibility_options
.inlines_hidden
= value
;
805 case OPT_fthreadsafe_statics
:
806 flag_threadsafe_statics
= value
;
810 flag_zero_link
= value
;
814 flag_gen_declaration
= 1;
818 add_path (xstrdup (arg
), AFTER
, 0, true);
823 defer_opt (code
, arg
);
835 add_path (xstrdup (arg
), QUOTE
, 0, true);
843 add_path (xstrdup (arg
), SYSTEM
, 0, true);
846 case OPT_iwithprefix
:
847 add_prefixed_path (arg
, SYSTEM
);
850 case OPT_iwithprefixbefore
:
851 add_prefixed_path (arg
, BRACKET
);
855 cpp_set_lang (parse_in
, CLK_ASM
);
856 cpp_opts
->dollars_in_ident
= false;
859 case OPT_lang_fortran
:
879 error ("output filename specified twice");
882 /* We need to handle the -pedantic switches here, rather than in
883 c_common_post_options, so that a subsequent -Wno-endif-labels
884 is not overridden. */
885 case OPT_pedantic_errors
:
886 cpp_opts
->pedantic_errors
= 1;
889 cpp_opts
->pedantic
= 1;
890 cpp_opts
->warn_endif_labels
= 1;
891 if (warn_pointer_sign
== -1)
892 warn_pointer_sign
= 1;
893 if (warn_overlength_strings
== -1)
894 warn_overlength_strings
= 1;
897 case OPT_print_objc_runtime_info
:
898 print_struct_values
= 1;
901 case OPT_print_pch_checksum
:
902 c_common_print_pch_checksum (stdout
);
903 exit_after_options
= true;
911 case OPT_std_gnu__98
:
912 if (!preprocessing_asm_p
)
913 set_std_cxx98 (code
== OPT_std_c__98
/* ISO */);
917 case OPT_std_iso9899_1990
:
918 case OPT_std_iso9899_199409
:
919 if (!preprocessing_asm_p
)
920 set_std_c89 (code
== OPT_std_iso9899_199409
/* c94 */, true /* ISO */);
924 if (!preprocessing_asm_p
)
925 set_std_c89 (false /* c94 */, false /* ISO */);
930 case OPT_std_iso9899_1999
:
931 case OPT_std_iso9899_199x
:
932 if (!preprocessing_asm_p
)
933 set_std_c99 (true /* ISO */);
938 if (!preprocessing_asm_p
)
939 set_std_c99 (false /* ISO */);
943 cpp_opts
->trigraphs
= 1;
946 case OPT_traditional_cpp
:
947 cpp_opts
->traditional
= 1;
955 cpp_opts
->inhibit_warnings
= 1;
966 /* Post-switch processing. */
968 c_common_post_options (const char **pfilename
)
970 struct cpp_callbacks
*cb
;
972 /* Canonicalize the input and output filenames. */
973 if (in_fnames
== NULL
)
975 in_fnames
= XNEWVEC (const char *, 1);
978 else if (strcmp (in_fnames
[0], "-") == 0)
981 if (out_fname
== NULL
|| !strcmp (out_fname
, "-"))
984 if (cpp_opts
->deps
.style
== DEPS_NONE
)
985 check_deps_environment_vars ();
987 handle_deferred_opts ();
989 sanitize_cpp_opts ();
991 register_include_chains (parse_in
, sysroot
, iprefix
, imultilib
,
992 std_inc
, std_cxx_inc
&& c_dialect_cxx (), verbose
);
994 #ifdef C_COMMON_OVERRIDE_OPTIONS
995 /* Some machines may reject certain combinations of C
996 language-specific options. */
997 C_COMMON_OVERRIDE_OPTIONS
;
1000 flag_inline_trees
= 1;
1002 /* Use tree inlining. */
1003 if (!flag_no_inline
)
1005 if (flag_inline_functions
)
1006 flag_inline_trees
= 2;
1008 /* We recognize -fgnu89-inline in preparation for 4.3 where the
1009 option will be meaningful. Here we just reject
1010 -fno-gnu89-inline, since we don't support it. */
1011 if (!flag_gnu89_inline
)
1012 error ("-fno-gnu89-inline is not supported");
1014 /* If we are given more than one input file, we must use
1015 unit-at-a-time mode. */
1016 if (num_in_fnames
> 1)
1017 flag_unit_at_a_time
= 1;
1019 /* Default to ObjC sjlj exception handling if NeXT runtime. */
1020 if (flag_objc_sjlj_exceptions
< 0)
1021 flag_objc_sjlj_exceptions
= flag_next_runtime
;
1022 if (flag_objc_exceptions
&& !flag_objc_sjlj_exceptions
)
1023 flag_exceptions
= 1;
1025 /* -Wextra implies -Wsign-compare, -Wmissing-field-initializers and
1026 -Woverride-init, but not if explicitly overridden. */
1027 if (warn_sign_compare
== -1)
1028 warn_sign_compare
= extra_warnings
;
1029 if (warn_missing_field_initializers
== -1)
1030 warn_missing_field_initializers
= extra_warnings
;
1031 if (warn_override_init
== -1)
1032 warn_override_init
= extra_warnings
;
1034 /* -Wpointer_sign is disabled by default, but it is enabled if any
1035 of -Wall or -pedantic are given. */
1036 if (warn_pointer_sign
== -1)
1037 warn_pointer_sign
= 0;
1039 /* -Woverlength-strings is off by default, but is enabled by -pedantic.
1040 It is never enabled in C++, as the minimum limit is not normative
1041 in that standard. */
1042 if (warn_overlength_strings
== -1 || c_dialect_cxx ())
1043 warn_overlength_strings
= 0;
1045 /* Special format checking options don't work without -Wformat; warn if
1049 warning (OPT_Wformat_y2k
,
1050 "-Wformat-y2k ignored without -Wformat");
1051 warning (OPT_Wformat_extra_args
,
1052 "-Wformat-extra-args ignored without -Wformat");
1053 warning (OPT_Wformat_zero_length
,
1054 "-Wformat-zero-length ignored without -Wformat");
1055 warning (OPT_Wformat_nonliteral
,
1056 "-Wformat-nonliteral ignored without -Wformat");
1057 warning (OPT_Wformat_security
,
1058 "-Wformat-security ignored without -Wformat");
1061 /* C99 requires special handling of complex multiplication and division;
1062 -ffast-math and -fcx-limited-range are handled in process_options. */
1064 flag_complex_method
= 2;
1066 if (flag_preprocess_only
)
1068 /* Open the output now. We must do so even if flag_no_output is
1069 on, because there may be other output than from the actual
1070 preprocessing (e.g. from -dM). */
1071 if (out_fname
[0] == '\0')
1072 out_stream
= stdout
;
1074 out_stream
= fopen (out_fname
, "w");
1076 if (out_stream
== NULL
)
1078 fatal_error ("opening output file %s: %m", out_fname
);
1082 if (num_in_fnames
> 1)
1083 error ("too many filenames given. Type %s --help for usage",
1086 init_pp_output (out_stream
);
1092 /* Yuk. WTF is this? I do know ObjC relies on it somewhere. */
1093 input_location
= UNKNOWN_LOCATION
;
1096 cb
= cpp_get_callbacks (parse_in
);
1097 cb
->file_change
= cb_file_change
;
1098 cb
->dir_change
= cb_dir_change
;
1099 cpp_post_options (parse_in
);
1101 input_location
= UNKNOWN_LOCATION
;
1103 /* If an error has occurred in cpplib, note it so we fail
1105 errorcount
+= cpp_errors (parse_in
);
1107 *pfilename
= this_input_filename
1108 = cpp_read_main_file (parse_in
, in_fnames
[0]);
1109 /* Don't do any compilation or preprocessing if there is no input file. */
1110 if (this_input_filename
== NULL
)
1116 if (flag_working_directory
1117 && flag_preprocess_only
&& !flag_no_line_commands
)
1118 pp_dir_change (parse_in
, get_src_pwd ());
1120 return flag_preprocess_only
;
1123 /* Front end initialization common to C, ObjC and C++. */
1125 c_common_init (void)
1127 /* Set up preprocessor arithmetic. Must be done after call to
1128 c_common_nodes_and_builtins for type nodes to be good. */
1129 cpp_opts
->precision
= TYPE_PRECISION (intmax_type_node
);
1130 cpp_opts
->char_precision
= TYPE_PRECISION (char_type_node
);
1131 cpp_opts
->int_precision
= TYPE_PRECISION (integer_type_node
);
1132 cpp_opts
->wchar_precision
= TYPE_PRECISION (wchar_type_node
);
1133 cpp_opts
->unsigned_wchar
= TYPE_UNSIGNED (wchar_type_node
);
1134 cpp_opts
->bytes_big_endian
= BYTES_BIG_ENDIAN
;
1136 /* This can't happen until after wchar_precision and bytes_big_endian
1138 cpp_init_iconv (parse_in
);
1141 c_common_print_pch_checksum (stderr
);
1143 if (flag_preprocess_only
)
1146 preprocess_file (parse_in
);
1150 /* Has to wait until now so that cpplib has its hash table. */
1156 /* Initialize the integrated preprocessor after debug output has been
1157 initialized; loop over each input file. */
1159 c_common_parse_file (int set_yydebug
)
1163 /* Enable parser debugging, if requested and we can. If requested
1164 and we can't, notify the user. */
1166 yydebug
= set_yydebug
;
1169 warning (0, "YYDEBUG was not defined at build time, -dy ignored");
1175 /* Start the main input file, if the debug writer wants it. */
1176 if (debug_hooks
->start_end_main_source_file
)
1177 (*debug_hooks
->start_source_file
) (0, this_input_filename
);
1184 /* And end the main input file, if the debug writer wants it */
1185 if (debug_hooks
->start_end_main_source_file
)
1186 (*debug_hooks
->end_source_file
) (0);
1187 if (++i
>= num_in_fnames
)
1189 cpp_undef_all (parse_in
);
1191 = cpp_read_main_file (parse_in
, in_fnames
[i
]);
1192 /* If an input file is missing, abandon further compilation.
1193 cpplib has issued a diagnostic. */
1194 if (!this_input_filename
)
1199 /* Common finish hook for the C, ObjC and C++ front ends. */
1201 c_common_finish (void)
1203 FILE *deps_stream
= NULL
;
1205 if (cpp_opts
->deps
.style
!= DEPS_NONE
)
1207 /* If -M or -MM was seen without -MF, default output to the
1210 deps_stream
= out_stream
;
1213 deps_stream
= fopen (deps_file
, deps_append
? "a": "w");
1215 fatal_error ("opening dependency file %s: %m", deps_file
);
1219 /* For performance, avoid tearing down cpplib's internal structures
1220 with cpp_destroy (). */
1221 errorcount
+= cpp_finish (parse_in
, deps_stream
);
1223 if (deps_stream
&& deps_stream
!= out_stream
1224 && (ferror (deps_stream
) || fclose (deps_stream
)))
1225 fatal_error ("closing dependency file %s: %m", deps_file
);
1227 if (out_stream
&& (ferror (out_stream
) || fclose (out_stream
)))
1228 fatal_error ("when writing output to %s: %m", out_fname
);
1231 /* Either of two environment variables can specify output of
1232 dependencies. Their value is either "OUTPUT_FILE" or "OUTPUT_FILE
1233 DEPS_TARGET", where OUTPUT_FILE is the file to write deps info to
1234 and DEPS_TARGET is the target to mention in the deps. They also
1235 result in dependency information being appended to the output file
1236 rather than overwriting it, and like Sun's compiler
1237 SUNPRO_DEPENDENCIES suppresses the dependency on the main file. */
1239 check_deps_environment_vars (void)
1243 GET_ENVIRONMENT (spec
, "DEPENDENCIES_OUTPUT");
1245 cpp_opts
->deps
.style
= DEPS_USER
;
1248 GET_ENVIRONMENT (spec
, "SUNPRO_DEPENDENCIES");
1251 cpp_opts
->deps
.style
= DEPS_SYSTEM
;
1252 cpp_opts
->deps
.ignore_main_file
= true;
1258 /* Find the space before the DEPS_TARGET, if there is one. */
1259 char *s
= strchr (spec
, ' ');
1262 /* Let the caller perform MAKE quoting. */
1263 defer_opt (OPT_MT
, s
+ 1);
1267 /* Command line -MF overrides environment variables and default. */
1276 /* Handle deferred command line switches. */
1278 handle_deferred_opts (void)
1283 /* Avoid allocating the deps buffer if we don't need it.
1284 (This flag may be true without there having been -MT or -MQ
1285 options, but we'll still need the deps buffer.) */
1289 deps
= cpp_get_deps (parse_in
);
1291 for (i
= 0; i
< deferred_count
; i
++)
1293 struct deferred_opt
*opt
= &deferred_opts
[i
];
1295 if (opt
->code
== OPT_MT
|| opt
->code
== OPT_MQ
)
1296 deps_add_target (deps
, opt
->arg
, opt
->code
== OPT_MQ
);
1300 /* These settings are appropriate for GCC, but not necessarily so for
1301 cpplib as a library. */
1303 sanitize_cpp_opts (void)
1305 /* If we don't know what style of dependencies to output, complain
1306 if any other dependency switches have been given. */
1307 if (deps_seen
&& cpp_opts
->deps
.style
== DEPS_NONE
)
1308 error ("to generate dependencies you must specify either -M or -MM");
1310 /* -dM and dependencies suppress normal output; do it here so that
1311 the last -d[MDN] switch overrides earlier ones. */
1312 if (flag_dump_macros
== 'M')
1315 /* Disable -dD, -dN and -dI if normal output is suppressed. Allow
1316 -dM since at least glibc relies on -M -dM to work. */
1317 /* Also, flag_no_output implies flag_no_line_commands, always. */
1320 if (flag_dump_macros
!= 'M')
1321 flag_dump_macros
= 0;
1322 flag_dump_includes
= 0;
1323 flag_no_line_commands
= 1;
1326 cpp_opts
->unsigned_char
= !flag_signed_char
;
1327 cpp_opts
->stdc_0_in_system_headers
= STDC_0_IN_SYSTEM_HEADERS
;
1329 /* We want -Wno-long-long to override -pedantic -std=non-c99
1330 and/or -Wtraditional, whatever the ordering. */
1331 cpp_opts
->warn_long_long
1332 = warn_long_long
&& ((!flag_isoc99
&& pedantic
) || warn_traditional
);
1334 /* Similarly with -Wno-variadic-macros. No check for c99 here, since
1335 this also turns off warnings about GCCs extension. */
1336 cpp_opts
->warn_variadic_macros
1337 = warn_variadic_macros
&& (pedantic
|| warn_traditional
);
1339 /* If we're generating preprocessor output, emit current directory
1340 if explicitly requested or if debugging information is enabled.
1341 ??? Maybe we should only do it for debugging formats that
1342 actually output the current directory? */
1343 if (flag_working_directory
== -1)
1344 flag_working_directory
= (debug_info_level
!= DINFO_LEVEL_NONE
);
1347 /* Add include path with a prefix at the front of its name. */
1349 add_prefixed_path (const char *suffix
, size_t chain
)
1353 size_t prefix_len
, suffix_len
;
1355 suffix_len
= strlen (suffix
);
1356 prefix
= iprefix
? iprefix
: cpp_GCC_INCLUDE_DIR
;
1357 prefix_len
= iprefix
? strlen (iprefix
) : cpp_GCC_INCLUDE_DIR_len
;
1359 path
= (char *) xmalloc (prefix_len
+ suffix_len
+ 1);
1360 memcpy (path
, prefix
, prefix_len
);
1361 memcpy (path
+ prefix_len
, suffix
, suffix_len
);
1362 path
[prefix_len
+ suffix_len
] = '\0';
1364 add_path (path
, chain
, 0, false);
1367 /* Handle -D, -U, -A, -imacros, and the first -include. */
1369 finish_options (void)
1371 if (!cpp_opts
->preprocessed
)
1375 cb_file_change (parse_in
,
1376 linemap_add (&line_table
, LC_RENAME
, 0,
1377 _("<built-in>"), 0));
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 cb_file_change (parse_in
,
1394 linemap_add (&line_table
, LC_RENAME
, 0,
1395 _("<command-line>"), 0));
1397 for (i
= 0; i
< deferred_count
; i
++)
1399 struct deferred_opt
*opt
= &deferred_opts
[i
];
1401 if (opt
->code
== OPT_D
)
1402 cpp_define (parse_in
, opt
->arg
);
1403 else if (opt
->code
== OPT_U
)
1404 cpp_undef (parse_in
, opt
->arg
);
1405 else if (opt
->code
== OPT_A
)
1407 if (opt
->arg
[0] == '-')
1408 cpp_unassert (parse_in
, opt
->arg
+ 1);
1410 cpp_assert (parse_in
, opt
->arg
);
1414 /* Handle -imacros after -D and -U. */
1415 for (i
= 0; i
< deferred_count
; i
++)
1417 struct deferred_opt
*opt
= &deferred_opts
[i
];
1419 if (opt
->code
== OPT_imacros
1420 && cpp_push_include (parse_in
, opt
->arg
))
1422 /* Disable push_command_line_include callback for now. */
1423 include_cursor
= deferred_count
+ 1;
1424 cpp_scan_nooutput (parse_in
);
1430 push_command_line_include ();
1433 /* Give CPP the next file given by -include, if any. */
1435 push_command_line_include (void)
1437 while (include_cursor
< deferred_count
)
1439 struct deferred_opt
*opt
= &deferred_opts
[include_cursor
++];
1441 if (!cpp_opts
->preprocessed
&& opt
->code
== OPT_include
1442 && cpp_push_include (parse_in
, opt
->arg
))
1446 if (include_cursor
== deferred_count
)
1449 /* -Wunused-macros should only warn about macros defined hereafter. */
1450 cpp_opts
->warn_unused_macros
= warn_unused_macros
;
1451 /* Restore the line map from <command line>. */
1452 if (!cpp_opts
->preprocessed
)
1453 cpp_change_file (parse_in
, LC_RENAME
, this_input_filename
);
1455 /* Set this here so the client can change the option if it wishes,
1456 and after stacking the main file so we don't trace the main file. */
1457 line_table
.trace_includes
= cpp_opts
->print_include_names
;
1461 /* File change callback. Has to handle -include files. */
1463 cb_file_change (cpp_reader
* ARG_UNUSED (pfile
),
1464 const struct line_map
*new_map
)
1466 if (flag_preprocess_only
)
1467 pp_file_change (new_map
);
1469 fe_file_change (new_map
);
1471 if (new_map
== 0 || (new_map
->reason
== LC_LEAVE
&& MAIN_FILE_P (new_map
)))
1472 push_command_line_include ();
1476 cb_dir_change (cpp_reader
* ARG_UNUSED (pfile
), const char *dir
)
1478 if (!set_src_pwd (dir
))
1479 warning (0, "too late for # directive to set debug directory");
1482 /* Set the C 89 standard (with 1994 amendments if C94, without GNU
1483 extensions if ISO). There is no concept of gnu94. */
1485 set_std_c89 (int c94
, int iso
)
1487 cpp_set_lang (parse_in
, c94
? CLK_STDC94
: iso
? CLK_STDC89
: CLK_GNUC89
);
1490 flag_no_gnu_keywords
= iso
;
1491 flag_no_nonansi_builtin
= iso
;
1496 /* Set the C 99 standard (without GNU extensions if ISO). */
1498 set_std_c99 (int iso
)
1500 cpp_set_lang (parse_in
, iso
? CLK_STDC99
: CLK_GNUC99
);
1502 flag_no_nonansi_builtin
= iso
;
1508 /* Set the C++ 98 standard (without GNU extensions if ISO). */
1510 set_std_cxx98 (int iso
)
1512 cpp_set_lang (parse_in
, iso
? CLK_CXX98
: CLK_GNUCXX
);
1513 flag_no_gnu_keywords
= iso
;
1514 flag_no_nonansi_builtin
= iso
;
1518 /* Handle setting implicit to ON. */
1520 set_Wimplicit (int on
)
1523 warn_implicit_int
= on
;
1526 if (mesg_implicit_function_declaration
!= 2)
1527 mesg_implicit_function_declaration
= 1;
1530 mesg_implicit_function_declaration
= 0;
1533 /* Args to -d specify what to dump. Silently ignore
1534 unrecognized options; they may be aimed at toplev.c. */
1536 handle_OPT_d (const char *arg
)
1540 while ((c
= *arg
++) != '\0')
1543 case 'M': /* Dump macros only. */
1544 case 'N': /* Dump names. */
1545 case 'D': /* Dump definitions. */
1546 flag_dump_macros
= c
;
1550 flag_dump_includes
= 1;