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_cxx0x (int);
113 static void set_std_c89 (int, int);
114 static void set_std_c99 (int);
115 static void check_deps_environment_vars (void);
116 static void handle_deferred_opts (void);
117 static void sanitize_cpp_opts (void);
118 static void add_prefixed_path (const char *, size_t);
119 static void push_command_line_include (void);
120 static void cb_file_change (cpp_reader
*, const struct line_map
*);
121 static void cb_dir_change (cpp_reader
*, const char *);
122 static void finish_options (void);
124 #ifndef STDC_0_IN_SYSTEM_HEADERS
125 #define STDC_0_IN_SYSTEM_HEADERS 0
128 /* Holds switches parsed by c_common_handle_option (), but whose
129 handling is deferred to c_common_post_options (). */
130 static void defer_opt (enum opt_code
, const char *);
131 static struct deferred_opt
137 /* Complain that switch CODE expects an argument but none was
138 provided. OPT was the command-line option. Return FALSE to get
139 the default message in opts.c, TRUE if we provide a specialized
142 c_common_missing_argument (const char *opt
, size_t code
)
147 /* Pick up the default message. */
150 case OPT_fconstant_string_class_
:
151 error ("no class name specified with %qs", opt
);
155 error ("assertion missing after %qs", opt
);
160 error ("macro name missing after %qs", opt
);
169 error ("missing path after %qs", opt
);
178 error ("missing filename after %qs", opt
);
183 error ("missing makefile target after %qs", opt
);
190 /* Defer option CODE with argument ARG. */
192 defer_opt (enum opt_code code
, const char *arg
)
194 deferred_opts
[deferred_count
].code
= code
;
195 deferred_opts
[deferred_count
].arg
= arg
;
199 /* Common initialization before parsing options. */
201 c_common_init_options (unsigned int argc
, const char **argv
)
203 static const unsigned int lang_flags
[] = {CL_C
, CL_ObjC
, CL_CXX
, CL_ObjCXX
};
204 unsigned int i
, result
;
206 /* This is conditionalized only because that is the way the front
207 ends used to do it. Maybe this should be unconditional? */
208 if (c_dialect_cxx ())
210 /* By default wrap lines at 80 characters. Is getenv
211 ("COLUMNS") preferable? */
212 diagnostic_line_cutoff (global_dc
) = 80;
213 /* By default, emit location information once for every
214 diagnostic message. */
215 diagnostic_prefixing_rule (global_dc
) = DIAGNOSTICS_SHOW_PREFIX_ONCE
;
218 parse_in
= cpp_create_reader (c_dialect_cxx () ? CLK_GNUCXX
: CLK_GNUC89
,
219 ident_hash
, &line_table
);
221 cpp_opts
= cpp_get_options (parse_in
);
222 cpp_opts
->dollars_in_ident
= DOLLARS_IN_IDENTIFIERS
;
223 cpp_opts
->objc
= c_dialect_objc ();
225 /* Reset to avoid warnings on internal definitions. We set it just
226 before passing on command-line options to cpplib. */
227 cpp_opts
->warn_dollars
= 0;
229 flag_exceptions
= c_dialect_cxx ();
230 warn_pointer_arith
= c_dialect_cxx ();
231 warn_write_strings
= c_dialect_cxx();
233 deferred_opts
= XNEWVEC (struct deferred_opt
, argc
);
235 result
= lang_flags
[c_language
];
237 if (c_language
== clk_c
)
239 /* If preprocessing assembly language, accept any of the C-family
240 front end options since the driver may pass them through. */
241 for (i
= 1; i
< argc
; i
++)
242 if (! strcmp (argv
[i
], "-lang-asm"))
244 result
|= CL_C
| CL_ObjC
| CL_CXX
| CL_ObjCXX
;
249 for (i
= 1; i
< argc
; i
++)
250 if (! strcmp (argv
[i
], "-lang-fortran"))
252 result
|= CL_Fortran
;
261 /* Handle switch SCODE with argument ARG. VALUE is true, unless no-
262 form of an -f or -W option was given. Returns 0 if the switch was
263 invalid, a negative number to prevent language-independent
264 processing in toplev.c (a hack necessary for the short-term). */
266 c_common_handle_option (size_t scode
, const char *arg
, int value
)
268 const struct cl_option
*option
= &cl_options
[scode
];
269 enum opt_code code
= (enum opt_code
) scode
;
272 /* Prevent resetting the language standard to a C dialect when the driver
273 has already determined that we're looking at assembler input. */
274 bool preprocessing_asm_p
= (cpp_get_options (parse_in
)->lang
== CLK_ASM
);
279 if (cl_options
[code
].flags
& (CL_C
| CL_CXX
| CL_ObjC
| CL_ObjCXX
))
282 if (lang_fortran
&& (cl_options
[code
].flags
& (CL_Fortran
)))
288 case OPT__output_pch_
:
293 defer_opt (code
, arg
);
297 cpp_opts
->discard_comments
= 0;
301 cpp_opts
->discard_comments
= 0;
302 cpp_opts
->discard_comments_in_macro_exp
= 0;
306 defer_opt (code
, arg
);
310 flag_preprocess_only
= 1;
314 cpp_opts
->print_include_names
= 1;
318 TARGET_OPTF (xstrdup (arg
));
322 if (strcmp (arg
, "-"))
323 add_path (xstrdup (arg
), BRACKET
, 0, true);
326 if (quote_chain_split
)
327 error ("-I- specified twice");
328 quote_chain_split
= true;
329 split_quote_chain ();
330 inform ("obsolete option -I- used, please use -iquote instead");
336 /* When doing dependencies with -M or -MM, suppress normal
337 preprocessed output, but still do -dM etc. as software
338 depends on this. Preprocessed output does occur if -MD, -MMD
339 or environment var dependency generation is used. */
340 cpp_opts
->deps
.style
= (code
== OPT_M
? DEPS_SYSTEM
: DEPS_USER
);
342 cpp_opts
->inhibit_warnings
= 1;
347 cpp_opts
->deps
.style
= (code
== OPT_MD
? DEPS_SYSTEM
: DEPS_USER
);
358 cpp_opts
->deps
.missing_files
= true;
363 cpp_opts
->deps
.phony_targets
= true;
369 defer_opt (code
, arg
);
373 flag_no_line_commands
= 1;
376 case OPT_fworking_directory
:
377 flag_working_directory
= value
;
381 defer_opt (code
, arg
);
387 set_Wimplicit (value
);
388 warn_char_subscripts
= value
;
389 warn_missing_braces
= value
;
390 warn_parentheses
= value
;
391 warn_return_type
= value
;
392 warn_sequence_point
= value
; /* Was C only. */
393 if (c_dialect_cxx ())
394 warn_sign_compare
= value
;
396 warn_strict_aliasing
= value
;
397 warn_string_literal_comparison
= value
;
398 warn_always_true
= value
;
400 /* Only warn about unknown pragmas that are not in system
402 warn_unknown_pragmas
= value
;
404 /* We save the value of warn_uninitialized, since if they put
405 -Wuninitialized on the command line, we need to generate a
406 warning about not using it without also specifying -O. */
407 if (warn_uninitialized
!= 1)
408 warn_uninitialized
= (value
? 2 : 0);
410 if (!c_dialect_cxx ())
411 /* We set this to 2 here, but 1 in -Wmain, so -ffreestanding
412 can turn it off only if it's not explicit. */
413 warn_main
= value
* 2;
416 /* C++-specific warnings. */
417 warn_reorder
= value
;
418 warn_nontemplate_friend
= value
;
421 cpp_opts
->warn_trigraphs
= value
;
422 cpp_opts
->warn_comments
= value
;
423 cpp_opts
->warn_num_sign_change
= value
;
424 cpp_opts
->warn_multichar
= value
; /* Was C++ only. */
426 if (warn_pointer_sign
== -1)
427 warn_pointer_sign
= 1;
432 cpp_opts
->warn_comments
= value
;
435 case OPT_Wdeprecated
:
436 cpp_opts
->warn_deprecated
= value
;
439 case OPT_Wendif_labels
:
440 cpp_opts
->warn_endif_labels
= value
;
444 cpp_opts
->warnings_are_errors
= value
;
445 global_dc
->warning_as_error_requested
= value
;
448 case OPT_Werror_implicit_function_declaration
:
449 mesg_implicit_function_declaration
= 2;
457 set_Wformat (atoi (arg
));
461 set_Wimplicit (value
);
465 /* Silently ignore for now. */
468 case OPT_Winvalid_pch
:
469 cpp_opts
->warn_invalid_pch
= value
;
479 case OPT_Wmissing_include_dirs
:
480 cpp_opts
->warn_missing_include_dirs
= value
;
484 cpp_opts
->warn_multichar
= value
;
487 case OPT_Wnormalized_
:
488 if (!value
|| (arg
&& strcasecmp (arg
, "none") == 0))
489 cpp_opts
->warn_normalize
= normalized_none
;
490 else if (!arg
|| strcasecmp (arg
, "nfkc") == 0)
491 cpp_opts
->warn_normalize
= normalized_KC
;
492 else if (strcasecmp (arg
, "id") == 0)
493 cpp_opts
->warn_normalize
= normalized_identifier_C
;
494 else if (strcasecmp (arg
, "nfc") == 0)
495 cpp_opts
->warn_normalize
= normalized_C
;
497 error ("argument %qs to %<-Wnormalized%> not recognized", arg
);
500 case OPT_Wreturn_type
:
501 warn_return_type
= value
;
504 case OPT_Wstrict_null_sentinel
:
505 warn_strict_null_sentinel
= value
;
508 case OPT_Wsystem_headers
:
509 cpp_opts
->warn_system_headers
= value
;
512 case OPT_Wtraditional
:
513 cpp_opts
->warn_traditional
= value
;
517 cpp_opts
->warn_trigraphs
= value
;
521 cpp_opts
->warn_undef
= value
;
524 case OPT_Wunknown_pragmas
:
525 /* Set to greater than 1, so that even unknown pragmas in
526 system headers will be warned about. */
527 warn_unknown_pragmas
= value
* 2;
530 case OPT_Wunused_macros
:
531 warn_unused_macros
= value
;
534 case OPT_Wvariadic_macros
:
535 warn_variadic_macros
= value
;
538 case OPT_Wwrite_strings
:
539 warn_write_strings
= value
;
545 warn_nonvdtor
= true;
549 if (!c_dialect_cxx ())
550 set_std_c89 (false, true);
552 set_std_cxx98 (true);
559 case OPT_fcond_mismatch
:
560 if (!c_dialect_cxx ())
562 flag_cond_mismatch
= value
;
567 case OPT_fall_virtual
:
568 case OPT_falt_external_templates
:
569 case OPT_fenum_int_equiv
:
570 case OPT_fexternal_templates
:
571 case OPT_fguiding_decls
:
573 case OPT_fhuge_objects
:
575 case OPT_fname_mangling_version_
:
577 case OPT_fnonnull_objects
:
579 case OPT_fstrict_prototype
:
580 case OPT_fthis_is_variable
:
581 case OPT_fvtable_thunks
:
584 warning (0, "switch %qs is no longer supported", option
->opt_text
);
587 case OPT_faccess_control
:
588 flag_access_control
= value
;
592 flag_no_asm
= !value
;
596 flag_no_builtin
= !value
;
603 disable_builtin_function (arg
);
606 case OPT_fdollars_in_identifiers
:
607 cpp_opts
->dollars_in_ident
= value
;
610 case OPT_ffreestanding
:
612 /* Fall through.... */
615 flag_no_builtin
= !value
;
616 /* warn_main will be 2 if set by -Wall, 1 if set by -Wmain */
617 if (!value
&& warn_main
== 2)
621 case OPT_fshort_double
:
622 flag_short_double
= value
;
625 case OPT_fshort_enums
:
626 flag_short_enums
= value
;
629 case OPT_fshort_wchar
:
630 flag_short_wchar
= value
;
633 case OPT_fsigned_bitfields
:
634 flag_signed_bitfields
= value
;
637 case OPT_fsigned_char
:
638 flag_signed_char
= value
;
641 case OPT_funsigned_bitfields
:
642 flag_signed_bitfields
= !value
;
645 case OPT_funsigned_char
:
646 flag_signed_char
= !value
;
650 flag_check_new
= value
;
653 case OPT_fconserve_space
:
654 flag_conserve_space
= value
;
657 case OPT_fconstant_string_class_
:
658 constant_string_class_name
= arg
;
661 case OPT_fdefault_inline
:
662 flag_default_inline
= value
;
665 case OPT_felide_constructors
:
666 flag_elide_constructors
= value
;
669 case OPT_fenforce_eh_specs
:
670 flag_enforce_eh_specs
= value
;
673 case OPT_fextended_identifiers
:
674 cpp_opts
->extended_identifiers
= value
;
678 flag_new_for_scope
= value
;
681 case OPT_fgnu_keywords
:
682 flag_no_gnu_keywords
= !value
;
685 case OPT_fgnu_runtime
:
686 flag_next_runtime
= !value
;
689 case OPT_fhandle_exceptions
:
690 warning (0, "-fhandle-exceptions has been renamed -fexceptions (and is now on by default)");
691 flag_exceptions
= value
;
694 case OPT_fimplement_inlines
:
695 flag_implement_inlines
= value
;
698 case OPT_fimplicit_inline_templates
:
699 flag_implicit_inline_templates
= value
;
702 case OPT_fimplicit_templates
:
703 flag_implicit_templates
= value
;
706 case OPT_fms_extensions
:
707 flag_ms_extensions
= value
;
710 case OPT_fnext_runtime
:
711 flag_next_runtime
= value
;
714 case OPT_fnil_receivers
:
715 flag_nil_receivers
= value
;
718 case OPT_fnonansi_builtins
:
719 flag_no_nonansi_builtin
= !value
;
722 case OPT_foperator_names
:
723 cpp_opts
->operator_names
= value
;
726 case OPT_foptional_diags
:
727 flag_optional_diags
= value
;
731 cpp_opts
->restore_pch_deps
= value
;
734 case OPT_fpch_preprocess
:
735 flag_pch_preprocess
= value
;
738 case OPT_fpermissive
:
739 flag_permissive
= value
;
742 case OPT_fpreprocessed
:
743 cpp_opts
->preprocessed
= value
;
746 case OPT_freplace_objc_classes
:
747 flag_replace_objc_classes
= value
;
751 flag_use_repository
= value
;
753 flag_implicit_templates
= 0;
760 case OPT_fshow_column
:
761 cpp_opts
->show_column
= value
;
765 flag_detailed_statistics
= value
;
769 /* It is documented that we silently ignore silly values. */
770 if (value
>= 1 && value
<= 100)
771 cpp_opts
->tabstop
= value
;
774 case OPT_fexec_charset_
:
775 cpp_opts
->narrow_charset
= arg
;
778 case OPT_fwide_exec_charset_
:
779 cpp_opts
->wide_charset
= arg
;
782 case OPT_finput_charset_
:
783 cpp_opts
->input_charset
= arg
;
786 case OPT_ftemplate_depth_
:
787 max_tinst_depth
= value
;
790 case OPT_fuse_cxa_atexit
:
791 flag_use_cxa_atexit
= value
;
794 case OPT_fuse_cxa_get_exception_ptr
:
795 flag_use_cxa_get_exception_ptr
= value
;
798 case OPT_fvisibility_inlines_hidden
:
799 visibility_options
.inlines_hidden
= value
;
806 case OPT_fthreadsafe_statics
:
807 flag_threadsafe_statics
= value
;
811 flag_zero_link
= value
;
815 flag_gen_declaration
= 1;
819 add_path (xstrdup (arg
), AFTER
, 0, true);
824 defer_opt (code
, arg
);
836 add_path (xstrdup (arg
), QUOTE
, 0, true);
844 add_path (xstrdup (arg
), SYSTEM
, 0, true);
847 case OPT_iwithprefix
:
848 add_prefixed_path (arg
, SYSTEM
);
851 case OPT_iwithprefixbefore
:
852 add_prefixed_path (arg
, BRACKET
);
856 cpp_set_lang (parse_in
, CLK_ASM
);
857 cpp_opts
->dollars_in_ident
= false;
860 case OPT_lang_fortran
:
880 error ("output filename specified twice");
883 /* We need to handle the -pedantic switches here, rather than in
884 c_common_post_options, so that a subsequent -Wno-endif-labels
885 is not overridden. */
886 case OPT_pedantic_errors
:
887 cpp_opts
->pedantic_errors
= 1;
890 cpp_opts
->pedantic
= 1;
891 cpp_opts
->warn_endif_labels
= 1;
892 if (warn_pointer_sign
== -1)
893 warn_pointer_sign
= 1;
894 if (warn_overlength_strings
== -1)
895 warn_overlength_strings
= 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 if (!preprocessing_asm_p
)
914 set_std_cxx98 (code
== OPT_std_c__98
/* ISO */);
918 case OPT_std_gnu__0x
:
919 if (!preprocessing_asm_p
)
920 set_std_cxx0x (code
== OPT_std_c__0x
/* ISO */);
924 case OPT_std_iso9899_1990
:
925 case OPT_std_iso9899_199409
:
926 if (!preprocessing_asm_p
)
927 set_std_c89 (code
== OPT_std_iso9899_199409
/* c94 */, true /* ISO */);
931 if (!preprocessing_asm_p
)
932 set_std_c89 (false /* c94 */, false /* ISO */);
937 case OPT_std_iso9899_1999
:
938 case OPT_std_iso9899_199x
:
939 if (!preprocessing_asm_p
)
940 set_std_c99 (true /* ISO */);
945 if (!preprocessing_asm_p
)
946 set_std_c99 (false /* ISO */);
950 cpp_opts
->trigraphs
= 1;
953 case OPT_traditional_cpp
:
954 cpp_opts
->traditional
= 1;
962 cpp_opts
->inhibit_warnings
= 1;
973 /* Post-switch processing. */
975 c_common_post_options (const char **pfilename
)
977 struct cpp_callbacks
*cb
;
979 /* Canonicalize the input and output filenames. */
980 if (in_fnames
== NULL
)
982 in_fnames
= XNEWVEC (const char *, 1);
985 else if (strcmp (in_fnames
[0], "-") == 0)
988 if (out_fname
== NULL
|| !strcmp (out_fname
, "-"))
991 if (cpp_opts
->deps
.style
== DEPS_NONE
)
992 check_deps_environment_vars ();
994 handle_deferred_opts ();
996 sanitize_cpp_opts ();
998 register_include_chains (parse_in
, sysroot
, iprefix
, imultilib
,
999 std_inc
, std_cxx_inc
&& c_dialect_cxx (), verbose
);
1001 #ifdef C_COMMON_OVERRIDE_OPTIONS
1002 /* Some machines may reject certain combinations of C
1003 language-specific options. */
1004 C_COMMON_OVERRIDE_OPTIONS
;
1007 flag_inline_trees
= 1;
1009 /* Use tree inlining. */
1010 if (!flag_no_inline
)
1012 if (flag_inline_functions
)
1013 flag_inline_trees
= 2;
1015 /* If we are given more than one input file, we must use
1016 unit-at-a-time mode. */
1017 if (num_in_fnames
> 1)
1018 flag_unit_at_a_time
= 1;
1020 /* Default to ObjC sjlj exception handling if NeXT runtime. */
1021 if (flag_objc_sjlj_exceptions
< 0)
1022 flag_objc_sjlj_exceptions
= flag_next_runtime
;
1023 if (flag_objc_exceptions
&& !flag_objc_sjlj_exceptions
)
1024 flag_exceptions
= 1;
1026 /* -Wextra implies -Wsign-compare, -Wmissing-field-initializers and
1027 -Woverride-init, but not if explicitly overridden. */
1028 if (warn_sign_compare
== -1)
1029 warn_sign_compare
= extra_warnings
;
1030 if (warn_missing_field_initializers
== -1)
1031 warn_missing_field_initializers
= extra_warnings
;
1032 if (warn_override_init
== -1)
1033 warn_override_init
= extra_warnings
;
1035 /* -Wpointer_sign is disabled by default, but it is enabled if any
1036 of -Wall or -pedantic are given. */
1037 if (warn_pointer_sign
== -1)
1038 warn_pointer_sign
= 0;
1040 /* -Woverlength-strings is off by default, but is enabled by -pedantic.
1041 It is never enabled in C++, as the minimum limit is not normative
1042 in that standard. */
1043 if (warn_overlength_strings
== -1 || c_dialect_cxx ())
1044 warn_overlength_strings
= 0;
1046 /* Special format checking options don't work without -Wformat; warn if
1050 warning (OPT_Wformat_y2k
,
1051 "-Wformat-y2k ignored without -Wformat");
1052 warning (OPT_Wformat_extra_args
,
1053 "-Wformat-extra-args ignored without -Wformat");
1054 warning (OPT_Wformat_zero_length
,
1055 "-Wformat-zero-length ignored without -Wformat");
1056 warning (OPT_Wformat_nonliteral
,
1057 "-Wformat-nonliteral ignored without -Wformat");
1058 warning (OPT_Wformat_security
,
1059 "-Wformat-security ignored without -Wformat");
1062 /* C99 requires special handling of complex multiplication and division;
1063 -ffast-math and -fcx-limited-range are handled in process_options. */
1065 flag_complex_method
= 2;
1067 if (flag_preprocess_only
)
1069 /* Open the output now. We must do so even if flag_no_output is
1070 on, because there may be other output than from the actual
1071 preprocessing (e.g. from -dM). */
1072 if (out_fname
[0] == '\0')
1073 out_stream
= stdout
;
1075 out_stream
= fopen (out_fname
, "w");
1077 if (out_stream
== NULL
)
1079 fatal_error ("opening output file %s: %m", out_fname
);
1083 if (num_in_fnames
> 1)
1084 error ("too many filenames given. Type %s --help for usage",
1087 init_pp_output (out_stream
);
1093 /* Yuk. WTF is this? I do know ObjC relies on it somewhere. */
1094 input_location
= UNKNOWN_LOCATION
;
1097 cb
= cpp_get_callbacks (parse_in
);
1098 cb
->file_change
= cb_file_change
;
1099 cb
->dir_change
= cb_dir_change
;
1100 cpp_post_options (parse_in
);
1102 input_location
= UNKNOWN_LOCATION
;
1104 /* If an error has occurred in cpplib, note it so we fail
1106 errorcount
+= cpp_errors (parse_in
);
1108 *pfilename
= this_input_filename
1109 = cpp_read_main_file (parse_in
, in_fnames
[0]);
1110 /* Don't do any compilation or preprocessing if there is no input file. */
1111 if (this_input_filename
== NULL
)
1117 if (flag_working_directory
1118 && flag_preprocess_only
&& !flag_no_line_commands
)
1119 pp_dir_change (parse_in
, get_src_pwd ());
1121 return flag_preprocess_only
;
1124 /* Front end initialization common to C, ObjC and C++. */
1126 c_common_init (void)
1128 /* Set up preprocessor arithmetic. Must be done after call to
1129 c_common_nodes_and_builtins for type nodes to be good. */
1130 cpp_opts
->precision
= TYPE_PRECISION (intmax_type_node
);
1131 cpp_opts
->char_precision
= TYPE_PRECISION (char_type_node
);
1132 cpp_opts
->int_precision
= TYPE_PRECISION (integer_type_node
);
1133 cpp_opts
->wchar_precision
= TYPE_PRECISION (wchar_type_node
);
1134 cpp_opts
->unsigned_wchar
= TYPE_UNSIGNED (wchar_type_node
);
1135 cpp_opts
->bytes_big_endian
= BYTES_BIG_ENDIAN
;
1137 /* This can't happen until after wchar_precision and bytes_big_endian
1139 cpp_init_iconv (parse_in
);
1142 c_common_print_pch_checksum (stderr
);
1144 if (flag_preprocess_only
)
1147 preprocess_file (parse_in
);
1151 /* Has to wait until now so that cpplib has its hash table. */
1157 /* Initialize the integrated preprocessor after debug output has been
1158 initialized; loop over each input file. */
1160 c_common_parse_file (int set_yydebug
)
1164 /* Enable parser debugging, if requested and we can. If requested
1165 and we can't, notify the user. */
1167 yydebug
= set_yydebug
;
1170 warning (0, "YYDEBUG was not defined at build time, -dy ignored");
1176 /* Start the main input file, if the debug writer wants it. */
1177 if (debug_hooks
->start_end_main_source_file
)
1178 (*debug_hooks
->start_source_file
) (0, this_input_filename
);
1185 /* And end the main input file, if the debug writer wants it */
1186 if (debug_hooks
->start_end_main_source_file
)
1187 (*debug_hooks
->end_source_file
) (0);
1188 if (++i
>= num_in_fnames
)
1190 cpp_undef_all (parse_in
);
1192 = cpp_read_main_file (parse_in
, in_fnames
[i
]);
1193 /* If an input file is missing, abandon further compilation.
1194 cpplib has issued a diagnostic. */
1195 if (!this_input_filename
)
1200 /* Common finish hook for the C, ObjC and C++ front ends. */
1202 c_common_finish (void)
1204 FILE *deps_stream
= NULL
;
1206 if (cpp_opts
->deps
.style
!= DEPS_NONE
)
1208 /* If -M or -MM was seen without -MF, default output to the
1211 deps_stream
= out_stream
;
1214 deps_stream
= fopen (deps_file
, deps_append
? "a": "w");
1216 fatal_error ("opening dependency file %s: %m", deps_file
);
1220 /* For performance, avoid tearing down cpplib's internal structures
1221 with cpp_destroy (). */
1222 errorcount
+= cpp_finish (parse_in
, deps_stream
);
1224 if (deps_stream
&& deps_stream
!= out_stream
1225 && (ferror (deps_stream
) || fclose (deps_stream
)))
1226 fatal_error ("closing dependency file %s: %m", deps_file
);
1228 if (out_stream
&& (ferror (out_stream
) || fclose (out_stream
)))
1229 fatal_error ("when writing output to %s: %m", out_fname
);
1232 /* Either of two environment variables can specify output of
1233 dependencies. Their value is either "OUTPUT_FILE" or "OUTPUT_FILE
1234 DEPS_TARGET", where OUTPUT_FILE is the file to write deps info to
1235 and DEPS_TARGET is the target to mention in the deps. They also
1236 result in dependency information being appended to the output file
1237 rather than overwriting it, and like Sun's compiler
1238 SUNPRO_DEPENDENCIES suppresses the dependency on the main file. */
1240 check_deps_environment_vars (void)
1244 GET_ENVIRONMENT (spec
, "DEPENDENCIES_OUTPUT");
1246 cpp_opts
->deps
.style
= DEPS_USER
;
1249 GET_ENVIRONMENT (spec
, "SUNPRO_DEPENDENCIES");
1252 cpp_opts
->deps
.style
= DEPS_SYSTEM
;
1253 cpp_opts
->deps
.ignore_main_file
= true;
1259 /* Find the space before the DEPS_TARGET, if there is one. */
1260 char *s
= strchr (spec
, ' ');
1263 /* Let the caller perform MAKE quoting. */
1264 defer_opt (OPT_MT
, s
+ 1);
1268 /* Command line -MF overrides environment variables and default. */
1277 /* Handle deferred command line switches. */
1279 handle_deferred_opts (void)
1284 /* Avoid allocating the deps buffer if we don't need it.
1285 (This flag may be true without there having been -MT or -MQ
1286 options, but we'll still need the deps buffer.) */
1290 deps
= cpp_get_deps (parse_in
);
1292 for (i
= 0; i
< deferred_count
; i
++)
1294 struct deferred_opt
*opt
= &deferred_opts
[i
];
1296 if (opt
->code
== OPT_MT
|| opt
->code
== OPT_MQ
)
1297 deps_add_target (deps
, opt
->arg
, opt
->code
== OPT_MQ
);
1301 /* These settings are appropriate for GCC, but not necessarily so for
1302 cpplib as a library. */
1304 sanitize_cpp_opts (void)
1306 /* If we don't know what style of dependencies to output, complain
1307 if any other dependency switches have been given. */
1308 if (deps_seen
&& cpp_opts
->deps
.style
== DEPS_NONE
)
1309 error ("to generate dependencies you must specify either -M or -MM");
1311 /* -dM and dependencies suppress normal output; do it here so that
1312 the last -d[MDN] switch overrides earlier ones. */
1313 if (flag_dump_macros
== 'M')
1316 /* Disable -dD, -dN and -dI if normal output is suppressed. Allow
1317 -dM since at least glibc relies on -M -dM to work. */
1318 /* Also, flag_no_output implies flag_no_line_commands, always. */
1321 if (flag_dump_macros
!= 'M')
1322 flag_dump_macros
= 0;
1323 flag_dump_includes
= 0;
1324 flag_no_line_commands
= 1;
1327 cpp_opts
->unsigned_char
= !flag_signed_char
;
1328 cpp_opts
->stdc_0_in_system_headers
= STDC_0_IN_SYSTEM_HEADERS
;
1330 /* We want -Wno-long-long to override -pedantic -std=non-c99
1331 and/or -Wtraditional, whatever the ordering. */
1332 cpp_opts
->warn_long_long
1333 = warn_long_long
&& ((!flag_isoc99
&& pedantic
) || warn_traditional
);
1335 /* Similarly with -Wno-variadic-macros. No check for c99 here, since
1336 this also turns off warnings about GCCs extension. */
1337 cpp_opts
->warn_variadic_macros
1338 = warn_variadic_macros
&& (pedantic
|| warn_traditional
);
1340 /* If we're generating preprocessor output, emit current directory
1341 if explicitly requested or if debugging information is enabled.
1342 ??? Maybe we should only do it for debugging formats that
1343 actually output the current directory? */
1344 if (flag_working_directory
== -1)
1345 flag_working_directory
= (debug_info_level
!= DINFO_LEVEL_NONE
);
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
= (char *) 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, false);
1368 /* Handle -D, -U, -A, -imacros, and the first -include. */
1370 finish_options (void)
1372 if (!cpp_opts
->preprocessed
)
1376 cb_file_change (parse_in
,
1377 linemap_add (&line_table
, LC_RENAME
, 0,
1378 _("<built-in>"), 0));
1380 cpp_init_builtins (parse_in
, flag_hosted
);
1381 c_cpp_builtins (parse_in
);
1383 /* We're about to send user input to cpplib, so make it warn for
1384 things that we previously (when we sent it internal definitions)
1385 told it to not warn.
1387 C99 permits implementation-defined characters in identifiers.
1388 The documented meaning of -std= is to turn off extensions that
1389 conflict with the specified standard, and since a strictly
1390 conforming program cannot contain a '$', we do not condition
1391 their acceptance on the -std= setting. */
1392 cpp_opts
->warn_dollars
= (cpp_opts
->pedantic
&& !cpp_opts
->c99
);
1394 cb_file_change (parse_in
,
1395 linemap_add (&line_table
, LC_RENAME
, 0,
1396 _("<command-line>"), 0));
1398 for (i
= 0; i
< deferred_count
; i
++)
1400 struct deferred_opt
*opt
= &deferred_opts
[i
];
1402 if (opt
->code
== OPT_D
)
1403 cpp_define (parse_in
, opt
->arg
);
1404 else if (opt
->code
== OPT_U
)
1405 cpp_undef (parse_in
, opt
->arg
);
1406 else if (opt
->code
== OPT_A
)
1408 if (opt
->arg
[0] == '-')
1409 cpp_unassert (parse_in
, opt
->arg
+ 1);
1411 cpp_assert (parse_in
, opt
->arg
);
1415 /* Handle -imacros after -D and -U. */
1416 for (i
= 0; i
< deferred_count
; i
++)
1418 struct deferred_opt
*opt
= &deferred_opts
[i
];
1420 if (opt
->code
== OPT_imacros
1421 && cpp_push_include (parse_in
, opt
->arg
))
1423 /* Disable push_command_line_include callback for now. */
1424 include_cursor
= deferred_count
+ 1;
1425 cpp_scan_nooutput (parse_in
);
1431 push_command_line_include ();
1434 /* Give CPP the next file given by -include, if any. */
1436 push_command_line_include (void)
1438 while (include_cursor
< deferred_count
)
1440 struct deferred_opt
*opt
= &deferred_opts
[include_cursor
++];
1442 if (!cpp_opts
->preprocessed
&& opt
->code
== OPT_include
1443 && cpp_push_include (parse_in
, opt
->arg
))
1447 if (include_cursor
== deferred_count
)
1450 /* -Wunused-macros should only warn about macros defined hereafter. */
1451 cpp_opts
->warn_unused_macros
= warn_unused_macros
;
1452 /* Restore the line map from <command line>. */
1453 if (!cpp_opts
->preprocessed
)
1454 cpp_change_file (parse_in
, LC_RENAME
, this_input_filename
);
1456 /* Set this here so the client can change the option if it wishes,
1457 and after stacking the main file so we don't trace the main file. */
1458 line_table
.trace_includes
= cpp_opts
->print_include_names
;
1462 /* File change callback. Has to handle -include files. */
1464 cb_file_change (cpp_reader
* ARG_UNUSED (pfile
),
1465 const struct line_map
*new_map
)
1467 if (flag_preprocess_only
)
1468 pp_file_change (new_map
);
1470 fe_file_change (new_map
);
1472 if (new_map
== 0 || (new_map
->reason
== LC_LEAVE
&& MAIN_FILE_P (new_map
)))
1473 push_command_line_include ();
1477 cb_dir_change (cpp_reader
* ARG_UNUSED (pfile
), const char *dir
)
1479 if (!set_src_pwd (dir
))
1480 warning (0, "too late for # directive to set debug directory");
1483 /* Set the C 89 standard (with 1994 amendments if C94, without GNU
1484 extensions if ISO). There is no concept of gnu94. */
1486 set_std_c89 (int c94
, int iso
)
1488 cpp_set_lang (parse_in
, c94
? CLK_STDC94
: iso
? CLK_STDC89
: CLK_GNUC89
);
1491 flag_no_gnu_keywords
= iso
;
1492 flag_no_nonansi_builtin
= iso
;
1497 /* Set the C 99 standard (without GNU extensions if ISO). */
1499 set_std_c99 (int iso
)
1501 cpp_set_lang (parse_in
, iso
? CLK_STDC99
: CLK_GNUC99
);
1503 flag_no_nonansi_builtin
= iso
;
1509 /* Set the C++ 98 standard (without GNU extensions if ISO). */
1511 set_std_cxx98 (int iso
)
1513 cpp_set_lang (parse_in
, iso
? CLK_CXX98
: CLK_GNUCXX
);
1514 flag_no_gnu_keywords
= iso
;
1515 flag_no_nonansi_builtin
= iso
;
1519 /* Set the C++ 0x working draft "standard" (without GNU extensions if ISO). */
1521 set_std_cxx0x (int iso
)
1523 cpp_set_lang (parse_in
, iso
? CLK_CXX0X
: CLK_GNUCXX0X
);
1524 flag_no_gnu_keywords
= iso
;
1525 flag_no_nonansi_builtin
= iso
;
1530 /* Handle setting implicit to ON. */
1532 set_Wimplicit (int on
)
1535 warn_implicit_int
= on
;
1538 if (mesg_implicit_function_declaration
!= 2)
1539 mesg_implicit_function_declaration
= 1;
1542 mesg_implicit_function_declaration
= 0;
1545 /* Args to -d specify what to dump. Silently ignore
1546 unrecognized options; they may be aimed at toplev.c. */
1548 handle_OPT_d (const char *arg
)
1552 while ((c
= *arg
++) != '\0')
1555 case 'M': /* Dump macros only. */
1556 case 'N': /* Dump names. */
1557 case 'D': /* Dump definitions. */
1558 flag_dump_macros
= c
;
1562 flag_dump_includes
= 1;