1 /* C/ObjC/C++ command line option handling.
2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
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"
30 #include "langhooks.h"
31 #include "diagnostic.h"
33 #include "cppdefault.h"
35 #include "debug.h" /* For debug_hooks. */
39 #include "target.h" /* For gcc_targetcm. */
41 #ifndef DOLLARS_IN_IDENTIFIERS
42 # define DOLLARS_IN_IDENTIFIERS true
45 #ifndef TARGET_SYSTEM_ROOT
46 # define TARGET_SYSTEM_ROOT NULL
50 #define TARGET_OPTF(ARG)
54 cpp_options
*cpp_opts
;
57 static const char *this_input_filename
;
59 /* Filename and stream for preprocessed output. */
60 static const char *out_fname
;
61 static FILE *out_stream
;
63 /* Append dependencies to deps_file. */
64 static bool deps_append
;
66 /* If dependency switches (-MF etc.) have been given. */
67 static bool deps_seen
;
72 /* Dependency output file. */
73 static const char *deps_file
;
75 /* The prefix given by -iprefix, if any. */
76 static const char *iprefix
;
78 /* The multilib directory given by -imultilib, if any. */
79 static const char *imultilib
;
81 /* The system root, if any. Overridden by -isysroot. */
82 static const char *sysroot
= TARGET_SYSTEM_ROOT
;
84 /* Zero disables all standard directories for headers. */
85 static bool std_inc
= true;
87 /* Zero disables the C++-specific standard directories for headers. */
88 static bool std_cxx_inc
= true;
90 /* If the quote chain has been split by -I-. */
91 static bool quote_chain_split
;
93 /* If -Wunused-macros. */
94 static bool warn_unused_macros
;
96 /* If -Wvariadic-macros. */
97 static bool warn_variadic_macros
= true;
99 /* Number of deferred options. */
100 static size_t deferred_count
;
102 /* Number of deferred options scanned for -include. */
103 static size_t include_cursor
;
105 static void handle_OPT_d (const char *);
106 static void set_std_cxx98 (int);
107 static void set_std_cxx0x (int);
108 static void set_std_c89 (int, int);
109 static void set_std_c99 (int);
110 static void set_std_c1x (int);
111 static void check_deps_environment_vars (void);
112 static void handle_deferred_opts (void);
113 static void sanitize_cpp_opts (void);
114 static void add_prefixed_path (const char *, size_t);
115 static void push_command_line_include (void);
116 static void cb_file_change (cpp_reader
*, const struct line_map
*);
117 static void cb_dir_change (cpp_reader
*, const char *);
118 static void finish_options (void);
120 #ifndef STDC_0_IN_SYSTEM_HEADERS
121 #define STDC_0_IN_SYSTEM_HEADERS 0
124 /* Holds switches parsed by c_common_handle_option (), but whose
125 handling is deferred to c_common_post_options (). */
126 static void defer_opt (enum opt_code
, const char *);
127 static struct deferred_opt
134 static const unsigned int
135 c_family_lang_mask
= (CL_C
| CL_CXX
| CL_ObjC
| CL_ObjCXX
);
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 /* -Werror= may set a warning option to enable a warning that is emitted
200 by the preprocessor. Set any corresponding flag in cpp_opts. */
203 warning_as_error_callback (int option_index
)
205 switch (option_index
)
208 /* Ignore options not associated with the preprocessor. */
211 case OPT_Wdeprecated
:
212 cpp_opts
->warn_deprecated
= 1;
217 cpp_opts
->warn_comments
= 1;
221 cpp_opts
->warn_trigraphs
= 1;
225 cpp_opts
->warn_multichar
= 1;
228 case OPT_Wtraditional
:
229 cpp_opts
->warn_traditional
= 1;
233 cpp_opts
->warn_long_long
= 1;
236 case OPT_Wendif_labels
:
237 cpp_opts
->warn_endif_labels
= 1;
240 case OPT_Wvariadic_macros
:
241 /* Set the local flag that is used later to update cpp_opts. */
242 warn_variadic_macros
= 1;
245 case OPT_Wbuiltin_macro_redefined
:
246 cpp_opts
->warn_builtin_macro_redefined
= 1;
250 cpp_opts
->warn_undef
= 1;
253 case OPT_Wunused_macros
:
254 /* Set the local flag that is used later to update cpp_opts. */
255 warn_unused_macros
= 1;
258 case OPT_Wc___compat
:
259 /* Add warnings in the same way as c_common_handle_option below. */
260 if (warn_enum_compare
== -1)
261 warn_enum_compare
= 1;
262 if (warn_jump_misses_init
== -1)
263 warn_jump_misses_init
= 1;
264 cpp_opts
->warn_cxx_operator_names
= 1;
267 case OPT_Wnormalized_
:
268 inform (input_location
, "-Werror=normalized=: Set -Wnormalized=nfc");
269 cpp_opts
->warn_normalize
= normalized_C
;
272 case OPT_Winvalid_pch
:
273 cpp_opts
->warn_invalid_pch
= 1;
277 /* Handled by standard diagnostics using the option's associated
283 /* Common initialization before parsing options. */
285 c_common_init_options (unsigned int argc
, const char **argv
)
287 static const unsigned int lang_flags
[] = {CL_C
, CL_ObjC
, CL_CXX
, CL_ObjCXX
};
288 unsigned int i
, result
;
289 struct cpp_callbacks
*cb
;
291 /* Register callback for warnings enabled by -Werror=. */
292 register_warning_as_error_callback (warning_as_error_callback
);
294 /* This is conditionalized only because that is the way the front
295 ends used to do it. Maybe this should be unconditional? */
296 if (c_dialect_cxx ())
298 /* By default wrap lines at 80 characters. Is getenv
299 ("COLUMNS") preferable? */
300 diagnostic_line_cutoff (global_dc
) = 80;
301 /* By default, emit location information once for every
302 diagnostic message. */
303 diagnostic_prefixing_rule (global_dc
) = DIAGNOSTICS_SHOW_PREFIX_ONCE
;
306 global_dc
->opt_permissive
= OPT_fpermissive
;
308 parse_in
= cpp_create_reader (c_dialect_cxx () ? CLK_GNUCXX
: CLK_GNUC89
,
309 ident_hash
, line_table
);
310 cb
= cpp_get_callbacks (parse_in
);
311 cb
->error
= c_cpp_error
;
313 cpp_opts
= cpp_get_options (parse_in
);
314 cpp_opts
->dollars_in_ident
= DOLLARS_IN_IDENTIFIERS
;
315 cpp_opts
->objc
= c_dialect_objc ();
317 /* Reset to avoid warnings on internal definitions. We set it just
318 before passing on command-line options to cpplib. */
319 cpp_opts
->warn_dollars
= 0;
321 flag_exceptions
= c_dialect_cxx ();
322 warn_pointer_arith
= c_dialect_cxx ();
323 warn_write_strings
= c_dialect_cxx();
324 flag_warn_unused_result
= true;
326 /* By default, C99-like requirements for complex multiply and divide. */
327 flag_complex_method
= 2;
329 deferred_opts
= XNEWVEC (struct deferred_opt
, argc
);
331 result
= lang_flags
[c_language
];
333 if (c_language
== clk_c
)
335 /* If preprocessing assembly language, accept any of the C-family
336 front end options since the driver may pass them through. */
337 for (i
= 1; i
< argc
; i
++)
338 if (! strcmp (argv
[i
], "-lang-asm"))
340 result
|= CL_C
| CL_ObjC
| CL_CXX
| CL_ObjCXX
;
348 /* Handle switch SCODE with argument ARG. VALUE is true, unless no-
349 form of an -f or -W option was given. Returns 0 if the switch was
350 invalid, a negative number to prevent language-independent
351 processing in toplev.c (a hack necessary for the short-term). */
353 c_common_handle_option (size_t scode
, const char *arg
, int value
,
356 const struct cl_option
*option
= &cl_options
[scode
];
357 enum opt_code code
= (enum opt_code
) scode
;
360 /* Prevent resetting the language standard to a C dialect when the driver
361 has already determined that we're looking at assembler input. */
362 bool preprocessing_asm_p
= (cpp_get_options (parse_in
)->lang
== CLK_ASM
);
367 if (cl_options
[code
].flags
& c_family_lang_mask
)
369 if ((option
->flags
& CL_TARGET
)
370 && ! targetcm
.handle_c_option (scode
, arg
, value
))
377 case OPT__output_pch_
:
382 defer_opt (code
, arg
);
386 cpp_opts
->discard_comments
= 0;
390 cpp_opts
->discard_comments
= 0;
391 cpp_opts
->discard_comments_in_macro_exp
= 0;
395 defer_opt (code
, arg
);
399 flag_preprocess_only
= 1;
403 cpp_opts
->print_include_names
= 1;
407 TARGET_OPTF (xstrdup (arg
));
411 if (strcmp (arg
, "-"))
412 add_path (xstrdup (arg
), BRACKET
, 0, true);
415 if (quote_chain_split
)
416 error ("-I- specified twice");
417 quote_chain_split
= true;
418 split_quote_chain ();
419 inform (input_location
, "obsolete option -I- used, please use -iquote instead");
425 /* When doing dependencies with -M or -MM, suppress normal
426 preprocessed output, but still do -dM etc. as software
427 depends on this. Preprocessed output does occur if -MD, -MMD
428 or environment var dependency generation is used. */
429 cpp_opts
->deps
.style
= (code
== OPT_M
? DEPS_SYSTEM
: DEPS_USER
);
435 cpp_opts
->deps
.style
= (code
== OPT_MD
? DEPS_SYSTEM
: DEPS_USER
);
436 cpp_opts
->deps
.need_preprocessor_output
= true;
447 cpp_opts
->deps
.missing_files
= true;
452 cpp_opts
->deps
.phony_targets
= true;
458 defer_opt (code
, arg
);
462 flag_no_line_commands
= 1;
465 case OPT_fworking_directory
:
466 flag_working_directory
= value
;
470 defer_opt (code
, arg
);
476 handle_option (OPT_Wimplicit
, value
, NULL
, c_family_lang_mask
, kind
);
477 warn_char_subscripts
= value
;
478 warn_missing_braces
= value
;
479 warn_parentheses
= value
;
480 warn_return_type
= value
;
481 warn_sequence_point
= value
; /* Was C only. */
483 if (warn_strict_aliasing
== -1)
484 set_Wstrict_aliasing (value
);
485 warn_address
= value
;
486 if (warn_strict_overflow
== -1)
487 warn_strict_overflow
= value
;
488 warn_array_bounds
= value
;
489 warn_volatile_register_var
= value
;
491 /* Only warn about unknown pragmas that are not in system
493 warn_unknown_pragmas
= value
;
495 warn_uninitialized
= value
;
497 if (!c_dialect_cxx ())
499 /* We set this to 2 here, but 1 in -Wmain, so -ffreestanding
500 can turn it off only if it's not explicit. */
502 warn_main
= (value
? 2 : 0);
504 /* In C, -Wall turns on -Wenum-compare, which we do here.
505 In C++ it is on by default, which is done in
506 c_common_post_options. */
507 if (warn_enum_compare
== -1)
508 warn_enum_compare
= value
;
512 /* C++-specific warnings. */
513 warn_sign_compare
= value
;
514 warn_reorder
= value
;
515 warn_cxx0x_compat
= value
;
518 cpp_opts
->warn_trigraphs
= value
;
519 cpp_opts
->warn_comments
= value
;
520 cpp_opts
->warn_num_sign_change
= value
;
522 if (warn_pointer_sign
== -1)
523 warn_pointer_sign
= value
;
526 case OPT_Wbuiltin_macro_redefined
:
527 cpp_opts
->warn_builtin_macro_redefined
= value
;
532 cpp_opts
->warn_comments
= value
;
535 case OPT_Wc___compat
:
536 /* Because -Wenum-compare is the default in C++, -Wc++-compat
537 implies -Wenum-compare. */
538 if (warn_enum_compare
== -1 && value
)
539 warn_enum_compare
= value
;
540 /* Because C++ always warns about a goto which misses an
541 initialization, -Wc++-compat turns on -Wjump-misses-init. */
542 if (warn_jump_misses_init
== -1 && value
)
543 warn_jump_misses_init
= value
;
544 cpp_opts
->warn_cxx_operator_names
= value
;
547 case OPT_Wdeprecated
:
548 cpp_opts
->warn_deprecated
= value
;
551 case OPT_Wendif_labels
:
552 cpp_opts
->warn_endif_labels
= value
;
556 global_dc
->warning_as_error_requested
= value
;
559 case OPT_Werror_implicit_function_declaration
:
560 /* For backward compatibility, this is the same as
561 -Werror=implicit-function-declaration. */
562 enable_warning_as_error ("implicit-function-declaration", value
, CL_C
| CL_ObjC
);
570 set_Wformat (atoi (arg
));
574 gcc_assert (value
== 0 || value
== 1);
575 if (warn_implicit_int
== -1)
576 handle_option (OPT_Wimplicit_int
, value
, NULL
,
577 c_family_lang_mask
, kind
);
578 if (warn_implicit_function_declaration
== -1)
579 handle_option (OPT_Wimplicit_function_declaration
, value
, NULL
,
580 c_family_lang_mask
, kind
);
584 /* Silently ignore for now. */
587 case OPT_Winvalid_pch
:
588 cpp_opts
->warn_invalid_pch
= value
;
591 case OPT_Wmissing_include_dirs
:
592 cpp_opts
->warn_missing_include_dirs
= value
;
596 cpp_opts
->warn_multichar
= value
;
599 case OPT_Wnormalized_
:
600 if (!value
|| (arg
&& strcasecmp (arg
, "none") == 0))
601 cpp_opts
->warn_normalize
= normalized_none
;
602 else if (!arg
|| strcasecmp (arg
, "nfkc") == 0)
603 cpp_opts
->warn_normalize
= normalized_KC
;
604 else if (strcasecmp (arg
, "id") == 0)
605 cpp_opts
->warn_normalize
= normalized_identifier_C
;
606 else if (strcasecmp (arg
, "nfc") == 0)
607 cpp_opts
->warn_normalize
= normalized_C
;
609 error ("argument %qs to %<-Wnormalized%> not recognized", arg
);
612 case OPT_Wreturn_type
:
613 warn_return_type
= value
;
616 case OPT_Wstrict_null_sentinel
:
617 warn_strict_null_sentinel
= value
;
620 case OPT_Wtraditional
:
621 cpp_opts
->warn_traditional
= value
;
625 cpp_opts
->warn_trigraphs
= value
;
629 cpp_opts
->warn_undef
= value
;
632 case OPT_Wunknown_pragmas
:
633 /* Set to greater than 1, so that even unknown pragmas in
634 system headers will be warned about. */
635 warn_unknown_pragmas
= value
* 2;
638 case OPT_Wunused_macros
:
639 warn_unused_macros
= value
;
642 case OPT_Wvariadic_macros
:
643 warn_variadic_macros
= value
;
646 case OPT_Wwrite_strings
:
647 warn_write_strings
= value
;
653 warn_nonvdtor
= true;
657 if (!c_dialect_cxx ())
658 set_std_c89 (false, true);
660 set_std_cxx98 (true);
667 case OPT_fcond_mismatch
:
668 if (!c_dialect_cxx ())
670 flag_cond_mismatch
= value
;
675 case OPT_fall_virtual
:
676 case OPT_falt_external_templates
:
677 case OPT_fenum_int_equiv
:
678 case OPT_fexternal_templates
:
679 case OPT_fguiding_decls
:
681 case OPT_fhuge_objects
:
683 case OPT_fname_mangling_version_
:
685 case OPT_fnonnull_objects
:
687 case OPT_fstrict_prototype
:
688 case OPT_fthis_is_variable
:
689 case OPT_fvtable_thunks
:
692 warning (0, "switch %qs is no longer supported", option
->opt_text
);
695 case OPT_faccess_control
:
696 flag_access_control
= value
;
700 flag_no_asm
= !value
;
704 flag_no_builtin
= !value
;
711 disable_builtin_function (arg
);
714 case OPT_fdirectives_only
:
715 cpp_opts
->directives_only
= value
;
718 case OPT_fdollars_in_identifiers
:
719 cpp_opts
->dollars_in_ident
= value
;
722 case OPT_ffreestanding
:
724 /* Fall through.... */
727 flag_no_builtin
= !value
;
730 case OPT_fshort_double
:
731 flag_short_double
= value
;
734 case OPT_fshort_enums
:
735 flag_short_enums
= value
;
738 case OPT_fshort_wchar
:
739 flag_short_wchar
= value
;
742 case OPT_fsigned_bitfields
:
743 flag_signed_bitfields
= value
;
746 case OPT_fsigned_char
:
747 flag_signed_char
= value
;
750 case OPT_funsigned_bitfields
:
751 flag_signed_bitfields
= !value
;
754 case OPT_funsigned_char
:
755 flag_signed_char
= !value
;
759 flag_check_new
= value
;
762 case OPT_fconserve_space
:
763 flag_conserve_space
= value
;
766 case OPT_fconstant_string_class_
:
767 constant_string_class_name
= arg
;
770 case OPT_fdefault_inline
:
771 flag_default_inline
= value
;
774 case OPT_felide_constructors
:
775 flag_elide_constructors
= value
;
778 case OPT_fenforce_eh_specs
:
779 flag_enforce_eh_specs
= value
;
782 case OPT_fextended_identifiers
:
783 cpp_opts
->extended_identifiers
= value
;
787 flag_new_for_scope
= value
;
790 case OPT_fgnu_keywords
:
791 flag_no_gnu_keywords
= !value
;
794 case OPT_fgnu_runtime
:
795 flag_next_runtime
= !value
;
798 case OPT_fhandle_exceptions
:
799 warning (0, "-fhandle-exceptions has been renamed -fexceptions (and is now on by default)");
800 flag_exceptions
= value
;
803 case OPT_fimplement_inlines
:
804 flag_implement_inlines
= value
;
807 case OPT_fimplicit_inline_templates
:
808 flag_implicit_inline_templates
= value
;
811 case OPT_fimplicit_templates
:
812 flag_implicit_templates
= value
;
815 case OPT_flax_vector_conversions
:
816 flag_lax_vector_conversions
= value
;
819 case OPT_fms_extensions
:
820 flag_ms_extensions
= value
;
823 case OPT_fnext_runtime
:
824 flag_next_runtime
= value
;
827 case OPT_fnil_receivers
:
828 flag_nil_receivers
= value
;
831 case OPT_fnonansi_builtins
:
832 flag_no_nonansi_builtin
= !value
;
835 case OPT_foperator_names
:
836 cpp_opts
->operator_names
= value
;
839 case OPT_foptional_diags
:
840 flag_optional_diags
= value
;
844 cpp_opts
->restore_pch_deps
= value
;
847 case OPT_fpch_preprocess
:
848 flag_pch_preprocess
= value
;
851 case OPT_fpermissive
:
852 flag_permissive
= value
;
853 global_dc
->permissive
= value
;
856 case OPT_fpreprocessed
:
857 cpp_opts
->preprocessed
= value
;
860 case OPT_freplace_objc_classes
:
861 flag_replace_objc_classes
= value
;
865 flag_use_repository
= value
;
867 flag_implicit_templates
= 0;
874 case OPT_fshow_column
:
875 cpp_opts
->show_column
= value
;
879 flag_detailed_statistics
= value
;
883 /* It is documented that we silently ignore silly values. */
884 if (value
>= 1 && value
<= 100)
885 cpp_opts
->tabstop
= value
;
888 case OPT_fexec_charset_
:
889 cpp_opts
->narrow_charset
= arg
;
892 case OPT_fwide_exec_charset_
:
893 cpp_opts
->wide_charset
= arg
;
896 case OPT_finput_charset_
:
897 cpp_opts
->input_charset
= arg
;
900 case OPT_ftemplate_depth_
:
901 /* Kept for backwards compatibility. */
902 case OPT_ftemplate_depth_eq
:
903 max_tinst_depth
= value
;
906 case OPT_fuse_cxa_atexit
:
907 flag_use_cxa_atexit
= value
;
910 case OPT_fuse_cxa_get_exception_ptr
:
911 flag_use_cxa_get_exception_ptr
= value
;
914 case OPT_fvisibility_inlines_hidden
:
915 visibility_options
.inlines_hidden
= value
;
922 case OPT_fthreadsafe_statics
:
923 flag_threadsafe_statics
= value
;
926 case OPT_fpretty_templates
:
927 flag_pretty_templates
= value
;
931 flag_zero_link
= value
;
935 flag_gen_declaration
= 1;
938 case OPT_femit_struct_debug_baseonly
:
939 set_struct_debug_option ("base");
942 case OPT_femit_struct_debug_reduced
:
943 set_struct_debug_option ("dir:ord:sys,dir:gen:any,ind:base");
946 case OPT_femit_struct_debug_detailed_
:
947 set_struct_debug_option (arg
);
951 add_path (xstrdup (arg
), AFTER
, 0, true);
956 defer_opt (code
, arg
);
968 add_path (xstrdup (arg
), QUOTE
, 0, true);
976 add_path (xstrdup (arg
), SYSTEM
, 0, true);
979 case OPT_iwithprefix
:
980 add_prefixed_path (arg
, SYSTEM
);
983 case OPT_iwithprefixbefore
:
984 add_prefixed_path (arg
, BRACKET
);
988 cpp_set_lang (parse_in
, CLK_ASM
);
989 cpp_opts
->dollars_in_ident
= false;
1000 case OPT_nostdinc__
:
1001 std_cxx_inc
= false;
1008 error ("output filename specified twice");
1011 /* We need to handle the -pedantic switches here, rather than in
1012 c_common_post_options, so that a subsequent -Wno-endif-labels
1013 is not overridden. */
1014 case OPT_pedantic_errors
:
1016 cpp_opts
->pedantic
= 1;
1017 cpp_opts
->warn_endif_labels
= 1;
1018 if (warn_pointer_sign
== -1)
1019 warn_pointer_sign
= 1;
1020 if (warn_overlength_strings
== -1)
1021 warn_overlength_strings
= 1;
1022 if (warn_main
== -1)
1026 case OPT_print_objc_runtime_info
:
1027 print_struct_values
= 1;
1030 case OPT_print_pch_checksum
:
1031 c_common_print_pch_checksum (stdout
);
1032 exit_after_options
= true;
1036 cpp_opts
->remap
= 1;
1040 case OPT_std_gnu__98
:
1041 if (!preprocessing_asm_p
)
1042 set_std_cxx98 (code
== OPT_std_c__98
/* ISO */);
1046 case OPT_std_gnu__0x
:
1047 if (!preprocessing_asm_p
)
1048 set_std_cxx0x (code
== OPT_std_c__0x
/* ISO */);
1053 case OPT_std_iso9899_1990
:
1054 case OPT_std_iso9899_199409
:
1055 if (!preprocessing_asm_p
)
1056 set_std_c89 (code
== OPT_std_iso9899_199409
/* c94 */, true /* ISO */);
1061 if (!preprocessing_asm_p
)
1062 set_std_c89 (false /* c94 */, false /* ISO */);
1067 case OPT_std_iso9899_1999
:
1068 case OPT_std_iso9899_199x
:
1069 if (!preprocessing_asm_p
)
1070 set_std_c99 (true /* ISO */);
1075 if (!preprocessing_asm_p
)
1076 set_std_c99 (false /* ISO */);
1080 if (!preprocessing_asm_p
)
1081 set_std_c1x (true /* ISO */);
1085 if (!preprocessing_asm_p
)
1086 set_std_c1x (false /* ISO */);
1090 cpp_opts
->trigraphs
= 1;
1093 case OPT_traditional_cpp
:
1094 cpp_opts
->traditional
= 1;
1113 /* Post-switch processing. */
1115 c_common_post_options (const char **pfilename
)
1117 struct cpp_callbacks
*cb
;
1119 /* Canonicalize the input and output filenames. */
1120 if (in_fnames
== NULL
)
1122 in_fnames
= XNEWVEC (const char *, 1);
1125 else if (strcmp (in_fnames
[0], "-") == 0)
1128 if (out_fname
== NULL
|| !strcmp (out_fname
, "-"))
1131 if (cpp_opts
->deps
.style
== DEPS_NONE
)
1132 check_deps_environment_vars ();
1134 handle_deferred_opts ();
1136 sanitize_cpp_opts ();
1138 register_include_chains (parse_in
, sysroot
, iprefix
, imultilib
,
1139 std_inc
, std_cxx_inc
&& c_dialect_cxx (), verbose
);
1141 #ifdef C_COMMON_OVERRIDE_OPTIONS
1142 /* Some machines may reject certain combinations of C
1143 language-specific options. */
1144 C_COMMON_OVERRIDE_OPTIONS
;
1147 /* Excess precision other than "fast" requires front-end
1149 if (c_dialect_cxx ())
1151 if (flag_excess_precision_cmdline
== EXCESS_PRECISION_STANDARD
1152 && TARGET_FLT_EVAL_METHOD_NON_DEFAULT
)
1153 sorry ("-fexcess-precision=standard for C++");
1154 flag_excess_precision_cmdline
= EXCESS_PRECISION_FAST
;
1156 else if (flag_excess_precision_cmdline
== EXCESS_PRECISION_DEFAULT
)
1157 flag_excess_precision_cmdline
= (flag_iso
1158 ? EXCESS_PRECISION_STANDARD
1159 : EXCESS_PRECISION_FAST
);
1161 /* By default we use C99 inline semantics in GNU99 or C99 mode. C99
1162 inline semantics are not supported in GNU89 or C89 mode. */
1163 if (flag_gnu89_inline
== -1)
1164 flag_gnu89_inline
= !flag_isoc99
;
1165 else if (!flag_gnu89_inline
&& !flag_isoc99
)
1166 error ("-fno-gnu89-inline is only supported in GNU99 or C99 mode");
1168 /* Default to ObjC sjlj exception handling if NeXT runtime. */
1169 if (flag_objc_sjlj_exceptions
< 0)
1170 flag_objc_sjlj_exceptions
= flag_next_runtime
;
1171 if (flag_objc_exceptions
&& !flag_objc_sjlj_exceptions
)
1172 flag_exceptions
= 1;
1174 /* -Wextra implies the following flags
1175 unless explicitly overridden. */
1176 if (warn_type_limits
== -1)
1177 warn_type_limits
= extra_warnings
;
1178 if (warn_clobbered
== -1)
1179 warn_clobbered
= extra_warnings
;
1180 if (warn_empty_body
== -1)
1181 warn_empty_body
= extra_warnings
;
1182 if (warn_sign_compare
== -1)
1183 warn_sign_compare
= extra_warnings
;
1184 if (warn_missing_field_initializers
== -1)
1185 warn_missing_field_initializers
= extra_warnings
;
1186 if (warn_missing_parameter_type
== -1)
1187 warn_missing_parameter_type
= extra_warnings
;
1188 if (warn_old_style_declaration
== -1)
1189 warn_old_style_declaration
= extra_warnings
;
1190 if (warn_override_init
== -1)
1191 warn_override_init
= extra_warnings
;
1192 if (warn_ignored_qualifiers
== -1)
1193 warn_ignored_qualifiers
= extra_warnings
;
1195 /* -Wpointer-sign is disabled by default, but it is enabled if any
1196 of -Wall or -pedantic are given. */
1197 if (warn_pointer_sign
== -1)
1198 warn_pointer_sign
= 0;
1200 if (warn_strict_aliasing
== -1)
1201 warn_strict_aliasing
= 0;
1202 if (warn_strict_overflow
== -1)
1203 warn_strict_overflow
= 0;
1204 if (warn_jump_misses_init
== -1)
1205 warn_jump_misses_init
= 0;
1207 /* -Woverlength-strings is off by default, but is enabled by -pedantic.
1208 It is never enabled in C++, as the minimum limit is not normative
1209 in that standard. */
1210 if (warn_overlength_strings
== -1 || c_dialect_cxx ())
1211 warn_overlength_strings
= 0;
1213 /* Wmain is enabled by default in C++ but not in C. */
1214 /* Wmain is disabled by default for -ffreestanding (!flag_hosted),
1215 even if -Wall was given (warn_main will be 2 if set by -Wall, 1
1216 if set by -Wmain). */
1217 if (warn_main
== -1)
1218 warn_main
= (c_dialect_cxx () && flag_hosted
) ? 1 : 0;
1219 else if (warn_main
== 2)
1220 warn_main
= flag_hosted
? 1 : 0;
1222 /* In C, -Wconversion enables -Wsign-conversion (unless disabled
1223 through -Wno-sign-conversion). While in C++,
1224 -Wsign-conversion needs to be requested explicitly. */
1225 if (warn_sign_conversion
== -1)
1226 warn_sign_conversion
= (c_dialect_cxx ()) ? 0 : warn_conversion
;
1228 /* In C, -Wall and -Wc++-compat enable -Wenum-compare, which we do
1229 in c_common_handle_option; if it has not yet been set, it is
1230 disabled by default. In C++, it is enabled by default. */
1231 if (warn_enum_compare
== -1)
1232 warn_enum_compare
= c_dialect_cxx () ? 1 : 0;
1234 /* -Wpacked-bitfield-compat is on by default for the C languages. The
1235 warning is issued in stor-layout.c which is not part of the front-end so
1236 we need to selectively turn it on here. */
1237 if (warn_packed_bitfield_compat
== -1)
1238 warn_packed_bitfield_compat
= 1;
1240 /* Special format checking options don't work without -Wformat; warn if
1244 warning (OPT_Wformat_y2k
,
1245 "-Wformat-y2k ignored without -Wformat");
1246 warning (OPT_Wformat_extra_args
,
1247 "-Wformat-extra-args ignored without -Wformat");
1248 warning (OPT_Wformat_zero_length
,
1249 "-Wformat-zero-length ignored without -Wformat");
1250 warning (OPT_Wformat_nonliteral
,
1251 "-Wformat-nonliteral ignored without -Wformat");
1252 warning (OPT_Wformat_contains_nul
,
1253 "-Wformat-contains-nul ignored without -Wformat");
1254 warning (OPT_Wformat_security
,
1255 "-Wformat-security ignored without -Wformat");
1258 if (warn_implicit
== -1)
1261 if (warn_implicit_int
== -1)
1262 warn_implicit_int
= 0;
1264 /* -Wimplicit-function-declaration is enabled by default for C99. */
1265 if (warn_implicit_function_declaration
== -1)
1266 warn_implicit_function_declaration
= flag_isoc99
;
1268 /* If we're allowing C++0x constructs, don't warn about C++0x
1269 compatibility problems. */
1270 if (cxx_dialect
== cxx0x
)
1271 warn_cxx0x_compat
= 0;
1273 if (flag_preprocess_only
)
1275 /* Open the output now. We must do so even if flag_no_output is
1276 on, because there may be other output than from the actual
1277 preprocessing (e.g. from -dM). */
1278 if (out_fname
[0] == '\0')
1279 out_stream
= stdout
;
1281 out_stream
= fopen (out_fname
, "w");
1283 if (out_stream
== NULL
)
1285 fatal_error ("opening output file %s: %m", out_fname
);
1289 if (num_in_fnames
> 1)
1290 error ("too many filenames given. Type %s --help for usage",
1293 init_pp_output (out_stream
);
1299 /* Yuk. WTF is this? I do know ObjC relies on it somewhere. */
1300 input_location
= UNKNOWN_LOCATION
;
1303 cb
= cpp_get_callbacks (parse_in
);
1304 cb
->file_change
= cb_file_change
;
1305 cb
->dir_change
= cb_dir_change
;
1306 cpp_post_options (parse_in
);
1308 input_location
= UNKNOWN_LOCATION
;
1310 *pfilename
= this_input_filename
1311 = cpp_read_main_file (parse_in
, in_fnames
[0]);
1312 /* Don't do any compilation or preprocessing if there is no input file. */
1313 if (this_input_filename
== NULL
)
1319 if (flag_working_directory
1320 && flag_preprocess_only
&& !flag_no_line_commands
)
1321 pp_dir_change (parse_in
, get_src_pwd ());
1323 return flag_preprocess_only
;
1326 /* Front end initialization common to C, ObjC and C++. */
1328 c_common_init (void)
1330 /* Set up preprocessor arithmetic. Must be done after call to
1331 c_common_nodes_and_builtins for type nodes to be good. */
1332 cpp_opts
->precision
= TYPE_PRECISION (intmax_type_node
);
1333 cpp_opts
->char_precision
= TYPE_PRECISION (char_type_node
);
1334 cpp_opts
->int_precision
= TYPE_PRECISION (integer_type_node
);
1335 cpp_opts
->wchar_precision
= TYPE_PRECISION (wchar_type_node
);
1336 cpp_opts
->unsigned_wchar
= TYPE_UNSIGNED (wchar_type_node
);
1337 cpp_opts
->bytes_big_endian
= BYTES_BIG_ENDIAN
;
1339 /* This can't happen until after wchar_precision and bytes_big_endian
1341 cpp_init_iconv (parse_in
);
1344 c_common_print_pch_checksum (stderr
);
1346 /* Has to wait until now so that cpplib has its hash table. */
1349 if (flag_preprocess_only
)
1352 preprocess_file (parse_in
);
1359 /* Initialize the integrated preprocessor after debug output has been
1360 initialized; loop over each input file. */
1362 c_common_parse_file (int set_yydebug
)
1370 warning(0, "The C parser does not support -dy, option ignored");
1374 "The Objective-C parser does not support -dy, option ignored");
1377 warning(0, "The C++ parser does not support -dy, option ignored");
1381 "The Objective-C++ parser does not support -dy, option ignored");
1396 /* And end the main input file, if the debug writer wants it */
1397 if (debug_hooks
->start_end_main_source_file
)
1398 (*debug_hooks
->end_source_file
) (0);
1399 if (++i
>= num_in_fnames
)
1401 cpp_undef_all (parse_in
);
1402 cpp_clear_file_cache (parse_in
);
1404 = cpp_read_main_file (parse_in
, in_fnames
[i
]);
1405 /* If an input file is missing, abandon further compilation.
1406 cpplib has issued a diagnostic. */
1407 if (!this_input_filename
)
1412 /* Common finish hook for the C, ObjC and C++ front ends. */
1414 c_common_finish (void)
1416 FILE *deps_stream
= NULL
;
1418 /* Don't write the deps file if there are errors. */
1419 if (cpp_opts
->deps
.style
!= DEPS_NONE
&& !seen_error ())
1421 /* If -M or -MM was seen without -MF, default output to the
1424 deps_stream
= out_stream
;
1427 deps_stream
= fopen (deps_file
, deps_append
? "a": "w");
1429 fatal_error ("opening dependency file %s: %m", deps_file
);
1433 /* For performance, avoid tearing down cpplib's internal structures
1434 with cpp_destroy (). */
1435 cpp_finish (parse_in
, deps_stream
);
1437 if (deps_stream
&& deps_stream
!= out_stream
1438 && (ferror (deps_stream
) || fclose (deps_stream
)))
1439 fatal_error ("closing dependency file %s: %m", deps_file
);
1441 if (out_stream
&& (ferror (out_stream
) || fclose (out_stream
)))
1442 fatal_error ("when writing output to %s: %m", out_fname
);
1445 /* Either of two environment variables can specify output of
1446 dependencies. Their value is either "OUTPUT_FILE" or "OUTPUT_FILE
1447 DEPS_TARGET", where OUTPUT_FILE is the file to write deps info to
1448 and DEPS_TARGET is the target to mention in the deps. They also
1449 result in dependency information being appended to the output file
1450 rather than overwriting it, and like Sun's compiler
1451 SUNPRO_DEPENDENCIES suppresses the dependency on the main file. */
1453 check_deps_environment_vars (void)
1457 GET_ENVIRONMENT (spec
, "DEPENDENCIES_OUTPUT");
1459 cpp_opts
->deps
.style
= DEPS_USER
;
1462 GET_ENVIRONMENT (spec
, "SUNPRO_DEPENDENCIES");
1465 cpp_opts
->deps
.style
= DEPS_SYSTEM
;
1466 cpp_opts
->deps
.ignore_main_file
= true;
1472 /* Find the space before the DEPS_TARGET, if there is one. */
1473 char *s
= strchr (spec
, ' ');
1476 /* Let the caller perform MAKE quoting. */
1477 defer_opt (OPT_MT
, s
+ 1);
1481 /* Command line -MF overrides environment variables and default. */
1490 /* Handle deferred command line switches. */
1492 handle_deferred_opts (void)
1497 /* Avoid allocating the deps buffer if we don't need it.
1498 (This flag may be true without there having been -MT or -MQ
1499 options, but we'll still need the deps buffer.) */
1503 deps
= cpp_get_deps (parse_in
);
1505 for (i
= 0; i
< deferred_count
; i
++)
1507 struct deferred_opt
*opt
= &deferred_opts
[i
];
1509 if (opt
->code
== OPT_MT
|| opt
->code
== OPT_MQ
)
1510 deps_add_target (deps
, opt
->arg
, opt
->code
== OPT_MQ
);
1514 /* These settings are appropriate for GCC, but not necessarily so for
1515 cpplib as a library. */
1517 sanitize_cpp_opts (void)
1519 /* If we don't know what style of dependencies to output, complain
1520 if any other dependency switches have been given. */
1521 if (deps_seen
&& cpp_opts
->deps
.style
== DEPS_NONE
)
1522 error ("to generate dependencies you must specify either -M or -MM");
1524 /* -dM and dependencies suppress normal output; do it here so that
1525 the last -d[MDN] switch overrides earlier ones. */
1526 if (flag_dump_macros
== 'M')
1529 /* By default, -fdirectives-only implies -dD. This allows subsequent phases
1530 to perform proper macro expansion. */
1531 if (cpp_opts
->directives_only
&& !cpp_opts
->preprocessed
&& !flag_dump_macros
)
1532 flag_dump_macros
= 'D';
1534 /* Disable -dD, -dN and -dI if normal output is suppressed. Allow
1535 -dM since at least glibc relies on -M -dM to work. */
1536 /* Also, flag_no_output implies flag_no_line_commands, always. */
1539 if (flag_dump_macros
!= 'M')
1540 flag_dump_macros
= 0;
1541 flag_dump_includes
= 0;
1542 flag_no_line_commands
= 1;
1544 else if (cpp_opts
->deps
.missing_files
)
1545 error ("-MG may only be used with -M or -MM");
1547 cpp_opts
->unsigned_char
= !flag_signed_char
;
1548 cpp_opts
->stdc_0_in_system_headers
= STDC_0_IN_SYSTEM_HEADERS
;
1550 /* Wlong-long is disabled by default. It is enabled by:
1551 [-pedantic | -Wtraditional] -std=[gnu|c]++98 ; or
1552 [-pedantic | -Wtraditional] -std=non-c99 .
1554 Either -Wlong-long or -Wno-long-long override any other settings. */
1555 if (warn_long_long
== -1)
1556 warn_long_long
= ((pedantic
|| warn_traditional
)
1557 && (c_dialect_cxx () ? cxx_dialect
== cxx98
: !flag_isoc99
));
1558 cpp_opts
->warn_long_long
= warn_long_long
;
1560 /* Similarly with -Wno-variadic-macros. No check for c99 here, since
1561 this also turns off warnings about GCCs extension. */
1562 cpp_opts
->warn_variadic_macros
1563 = warn_variadic_macros
&& (pedantic
|| warn_traditional
);
1565 /* If we're generating preprocessor output, emit current directory
1566 if explicitly requested or if debugging information is enabled.
1567 ??? Maybe we should only do it for debugging formats that
1568 actually output the current directory? */
1569 if (flag_working_directory
== -1)
1570 flag_working_directory
= (debug_info_level
!= DINFO_LEVEL_NONE
);
1572 if (cpp_opts
->directives_only
)
1574 if (warn_unused_macros
)
1575 error ("-fdirectives-only is incompatible with -Wunused_macros");
1576 if (cpp_opts
->traditional
)
1577 error ("-fdirectives-only is incompatible with -traditional");
1581 /* Add include path with a prefix at the front of its name. */
1583 add_prefixed_path (const char *suffix
, size_t chain
)
1587 size_t prefix_len
, suffix_len
;
1589 suffix_len
= strlen (suffix
);
1590 prefix
= iprefix
? iprefix
: cpp_GCC_INCLUDE_DIR
;
1591 prefix_len
= iprefix
? strlen (iprefix
) : cpp_GCC_INCLUDE_DIR_len
;
1593 path
= (char *) xmalloc (prefix_len
+ suffix_len
+ 1);
1594 memcpy (path
, prefix
, prefix_len
);
1595 memcpy (path
+ prefix_len
, suffix
, suffix_len
);
1596 path
[prefix_len
+ suffix_len
] = '\0';
1598 add_path (path
, chain
, 0, false);
1601 /* Handle -D, -U, -A, -imacros, and the first -include. */
1603 finish_options (void)
1605 if (!cpp_opts
->preprocessed
)
1609 cb_file_change (parse_in
,
1610 linemap_add (line_table
, LC_RENAME
, 0,
1611 _("<built-in>"), 0));
1613 cpp_init_builtins (parse_in
, flag_hosted
);
1614 c_cpp_builtins (parse_in
);
1616 /* We're about to send user input to cpplib, so make it warn for
1617 things that we previously (when we sent it internal definitions)
1618 told it to not warn.
1620 C99 permits implementation-defined characters in identifiers.
1621 The documented meaning of -std= is to turn off extensions that
1622 conflict with the specified standard, and since a strictly
1623 conforming program cannot contain a '$', we do not condition
1624 their acceptance on the -std= setting. */
1625 cpp_opts
->warn_dollars
= (cpp_opts
->pedantic
&& !cpp_opts
->c99
);
1627 cb_file_change (parse_in
,
1628 linemap_add (line_table
, LC_RENAME
, 0,
1629 _("<command-line>"), 0));
1631 for (i
= 0; i
< deferred_count
; i
++)
1633 struct deferred_opt
*opt
= &deferred_opts
[i
];
1635 if (opt
->code
== OPT_D
)
1636 cpp_define (parse_in
, opt
->arg
);
1637 else if (opt
->code
== OPT_U
)
1638 cpp_undef (parse_in
, opt
->arg
);
1639 else if (opt
->code
== OPT_A
)
1641 if (opt
->arg
[0] == '-')
1642 cpp_unassert (parse_in
, opt
->arg
+ 1);
1644 cpp_assert (parse_in
, opt
->arg
);
1648 /* Start the main input file, if the debug writer wants it. */
1649 if (debug_hooks
->start_end_main_source_file
1650 && !flag_preprocess_only
)
1651 (*debug_hooks
->start_source_file
) (0, this_input_filename
);
1653 /* Handle -imacros after -D and -U. */
1654 for (i
= 0; i
< deferred_count
; i
++)
1656 struct deferred_opt
*opt
= &deferred_opts
[i
];
1658 if (opt
->code
== OPT_imacros
1659 && cpp_push_include (parse_in
, opt
->arg
))
1661 /* Disable push_command_line_include callback for now. */
1662 include_cursor
= deferred_count
+ 1;
1663 cpp_scan_nooutput (parse_in
);
1669 if (cpp_opts
->directives_only
)
1670 cpp_init_special_builtins (parse_in
);
1672 /* Start the main input file, if the debug writer wants it. */
1673 if (debug_hooks
->start_end_main_source_file
1674 && !flag_preprocess_only
)
1675 (*debug_hooks
->start_source_file
) (0, this_input_filename
);
1679 push_command_line_include ();
1682 /* Give CPP the next file given by -include, if any. */
1684 push_command_line_include (void)
1686 while (include_cursor
< deferred_count
)
1688 struct deferred_opt
*opt
= &deferred_opts
[include_cursor
++];
1690 if (!cpp_opts
->preprocessed
&& opt
->code
== OPT_include
1691 && cpp_push_include (parse_in
, opt
->arg
))
1695 if (include_cursor
== deferred_count
)
1698 /* -Wunused-macros should only warn about macros defined hereafter. */
1699 cpp_opts
->warn_unused_macros
= warn_unused_macros
;
1700 /* Restore the line map from <command line>. */
1701 if (!cpp_opts
->preprocessed
)
1702 cpp_change_file (parse_in
, LC_RENAME
, this_input_filename
);
1704 /* Set this here so the client can change the option if it wishes,
1705 and after stacking the main file so we don't trace the main file. */
1706 line_table
->trace_includes
= cpp_opts
->print_include_names
;
1710 /* File change callback. Has to handle -include files. */
1712 cb_file_change (cpp_reader
* ARG_UNUSED (pfile
),
1713 const struct line_map
*new_map
)
1715 if (flag_preprocess_only
)
1716 pp_file_change (new_map
);
1718 fe_file_change (new_map
);
1720 if (new_map
== 0 || (new_map
->reason
== LC_LEAVE
&& MAIN_FILE_P (new_map
)))
1721 push_command_line_include ();
1725 cb_dir_change (cpp_reader
* ARG_UNUSED (pfile
), const char *dir
)
1727 if (!set_src_pwd (dir
))
1728 warning (0, "too late for # directive to set debug directory");
1731 /* Set the C 89 standard (with 1994 amendments if C94, without GNU
1732 extensions if ISO). There is no concept of gnu94. */
1734 set_std_c89 (int c94
, int iso
)
1736 cpp_set_lang (parse_in
, c94
? CLK_STDC94
: iso
? CLK_STDC89
: CLK_GNUC89
);
1739 flag_no_gnu_keywords
= iso
;
1740 flag_no_nonansi_builtin
= iso
;
1746 /* Set the C 99 standard (without GNU extensions if ISO). */
1748 set_std_c99 (int iso
)
1750 cpp_set_lang (parse_in
, iso
? CLK_STDC99
: CLK_GNUC99
);
1752 flag_no_nonansi_builtin
= iso
;
1759 /* Set the C 1X standard draft (without GNU extensions if ISO). */
1761 set_std_c1x (int iso
)
1763 cpp_set_lang (parse_in
, iso
? CLK_STDC1X
: CLK_GNUC1X
);
1765 flag_no_nonansi_builtin
= iso
;
1772 /* Set the C++ 98 standard (without GNU extensions if ISO). */
1774 set_std_cxx98 (int iso
)
1776 cpp_set_lang (parse_in
, iso
? CLK_CXX98
: CLK_GNUCXX
);
1777 flag_no_gnu_keywords
= iso
;
1778 flag_no_nonansi_builtin
= iso
;
1780 cxx_dialect
= cxx98
;
1783 /* Set the C++ 0x working draft "standard" (without GNU extensions if ISO). */
1785 set_std_cxx0x (int iso
)
1787 cpp_set_lang (parse_in
, iso
? CLK_CXX0X
: CLK_GNUCXX0X
);
1788 flag_no_gnu_keywords
= iso
;
1789 flag_no_nonansi_builtin
= iso
;
1791 cxx_dialect
= cxx0x
;
1794 /* Args to -d specify what to dump. Silently ignore
1795 unrecognized options; they may be aimed at toplev.c. */
1797 handle_OPT_d (const char *arg
)
1801 while ((c
= *arg
++) != '\0')
1804 case 'M': /* Dump macros only. */
1805 case 'N': /* Dump names. */
1806 case 'D': /* Dump definitions. */
1807 case 'U': /* Dump used macros. */
1808 flag_dump_macros
= c
;
1812 flag_dump_includes
= 1;