1 /* C/ObjC/C++ command line option handling.
2 Copyright (C) 2002-2019 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 3, 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 COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
23 #include "coretypes.h"
28 #include "tm_p.h" /* For C_COMMON_OVERRIDE_OPTIONS. */
29 #include "diagnostic.h"
33 #include "langhooks.h"
34 #include "tree-diagnostic.h" /* for virt_loc_aware_diagnostic_finalizer */
36 #include "cppdefault.h"
38 #include "debug.h" /* For debug_hooks. */
40 #include "plugin.h" /* For PLUGIN_INCLUDE_FILE event. */
43 #include "file-prefix-map.h" /* add_*_prefix_map() */
45 #ifndef DOLLARS_IN_IDENTIFIERS
46 # define DOLLARS_IN_IDENTIFIERS true
49 #ifndef TARGET_SYSTEM_ROOT
50 # define TARGET_SYSTEM_ROOT NULL
54 #define TARGET_OPTF(ARG)
58 cpp_options
*cpp_opts
;
61 static const char *this_input_filename
;
63 /* Filename and stream for preprocessed output. */
64 static const char *out_fname
;
65 static FILE *out_stream
;
67 /* Append dependencies to deps_file. */
68 static bool deps_append
;
70 /* If dependency switches (-MF etc.) have been given. */
71 static bool deps_seen
;
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 /* Number of deferred options. */
98 static size_t deferred_count
;
100 /* Number of deferred options scanned for -include. */
101 static size_t include_cursor
;
103 /* Dump files/flags to use during parsing. */
104 static FILE *original_dump_file
= NULL
;
105 static dump_flags_t original_dump_flags
;
107 /* Whether any standard preincluded header has been preincluded. */
108 static bool done_preinclude
;
110 static void handle_OPT_d (const char *);
111 static void set_std_cxx98 (int);
112 static void set_std_cxx11 (int);
113 static void set_std_cxx14 (int);
114 static void set_std_cxx17 (int);
115 static void set_std_cxx2a (int);
116 static void set_std_c89 (int, int);
117 static void set_std_c99 (int);
118 static void set_std_c11 (int);
119 static void set_std_c17 (int);
120 static void set_std_c2x (int);
121 static void check_deps_environment_vars (void);
122 static void handle_deferred_opts (void);
123 static void sanitize_cpp_opts (void);
124 static void add_prefixed_path (const char *, incpath_kind
);
125 static void push_command_line_include (void);
126 static void cb_file_change (cpp_reader
*, const line_map_ordinary
*);
127 static void cb_dir_change (cpp_reader
*, const char *);
128 static void c_finish_options (void);
130 #ifndef STDC_0_IN_SYSTEM_HEADERS
131 #define STDC_0_IN_SYSTEM_HEADERS 0
134 /* Holds switches parsed by c_common_handle_option (), but whose
135 handling is deferred to c_common_post_options (). */
136 static void defer_opt (enum opt_code
, const char *);
137 static struct deferred_opt
144 extern const unsigned int
145 c_family_lang_mask
= (CL_C
| CL_CXX
| CL_ObjC
| CL_ObjCXX
);
147 /* Defer option CODE with argument ARG. */
149 defer_opt (enum opt_code code
, const char *arg
)
151 deferred_opts
[deferred_count
].code
= code
;
152 deferred_opts
[deferred_count
].arg
= arg
;
156 /* Return language mask for option parsing. */
158 c_common_option_lang_mask (void)
160 static const unsigned int lang_flags
[] = {CL_C
, CL_ObjC
, CL_CXX
, CL_ObjCXX
};
162 return lang_flags
[c_language
];
165 /* Diagnostic finalizer for C/C++/Objective-C/Objective-C++. */
167 c_diagnostic_finalizer (diagnostic_context
*context
,
168 diagnostic_info
*diagnostic
,
171 diagnostic_show_locus (context
, diagnostic
->richloc
, diagnostic
->kind
);
172 /* By default print macro expansion contexts in the diagnostic
173 finalizer -- for tokens resulting from macro expansion. */
174 virt_loc_aware_diagnostic_finalizer (context
, diagnostic
);
175 pp_destroy_prefix (context
->printer
);
176 pp_flush (context
->printer
);
179 /* Common default settings for diagnostics. */
181 c_common_diagnostics_set_defaults (diagnostic_context
*context
)
183 diagnostic_finalizer (context
) = c_diagnostic_finalizer
;
184 context
->opt_permissive
= OPT_fpermissive
;
187 /* Whether options from all C-family languages should be accepted
189 static bool accept_all_c_family_options
= false;
191 /* Return whether to complain about a wrong-language option. */
193 c_common_complain_wrong_lang_p (const struct cl_option
*option
)
195 if (accept_all_c_family_options
196 && (option
->flags
& c_family_lang_mask
))
202 /* Initialize options structure OPTS. */
204 c_common_init_options_struct (struct gcc_options
*opts
)
206 opts
->x_flag_exceptions
= c_dialect_cxx ();
207 opts
->x_warn_pointer_arith
= c_dialect_cxx ();
208 opts
->x_warn_write_strings
= c_dialect_cxx ();
209 opts
->x_flag_warn_unused_result
= true;
211 /* By default, C99-like requirements for complex multiply and divide. */
212 opts
->x_flag_complex_method
= 2;
215 /* Common initialization before calling option handlers. */
217 c_common_init_options (unsigned int decoded_options_count
,
218 struct cl_decoded_option
*decoded_options
)
221 struct cpp_callbacks
*cb
;
224 = new (ggc_alloc
<string_concat_db
> ()) string_concat_db ();
226 parse_in
= cpp_create_reader (c_dialect_cxx () ? CLK_GNUCXX
: CLK_GNUC89
,
227 ident_hash
, line_table
);
228 cb
= cpp_get_callbacks (parse_in
);
229 cb
->diagnostic
= c_cpp_diagnostic
;
231 cpp_opts
= cpp_get_options (parse_in
);
232 cpp_opts
->dollars_in_ident
= DOLLARS_IN_IDENTIFIERS
;
233 cpp_opts
->objc
= c_dialect_objc ();
235 /* Reset to avoid warnings on internal definitions. We set it just
236 before passing on command-line options to cpplib. */
237 cpp_opts
->warn_dollars
= 0;
239 deferred_opts
= XNEWVEC (struct deferred_opt
, decoded_options_count
);
241 if (c_language
== clk_c
)
243 /* The default for C is gnu17. */
244 set_std_c17 (false /* ISO */);
246 /* If preprocessing assembly language, accept any of the C-family
247 front end options since the driver may pass them through. */
248 for (i
= 1; i
< decoded_options_count
; i
++)
249 if (decoded_options
[i
].opt_index
== OPT_lang_asm
)
251 accept_all_c_family_options
= true;
256 /* Set C++ standard to C++14 if not specified on the command line. */
257 if (c_dialect_cxx ())
258 set_std_cxx14 (/*ISO*/false);
260 global_dc
->colorize_source_p
= true;
263 /* Handle switch SCODE with argument ARG. VALUE is true, unless no-
264 form of an -f or -W option was given. Returns false if the switch was
265 invalid, true if valid. Use HANDLERS in recursive handle_option calls. */
267 c_common_handle_option (size_t scode
, const char *arg
, HOST_WIDE_INT value
,
268 int kind
, location_t loc
,
269 const struct cl_option_handlers
*handlers
)
271 const struct cl_option
*option
= &cl_options
[scode
];
272 enum opt_code code
= (enum opt_code
) scode
;
275 /* Prevent resetting the language standard to a C dialect when the driver
276 has already determined that we're looking at assembler input. */
277 bool preprocessing_asm_p
= (cpp_get_options (parse_in
)->lang
== CLK_ASM
);
282 if (cl_options
[code
].flags
& c_family_lang_mask
)
284 if ((option
->flags
& CL_TARGET
)
285 && ! targetcm
.handle_c_option (scode
, arg
, value
))
292 case OPT__output_pch_
:
297 defer_opt (code
, arg
);
301 cpp_opts
->discard_comments
= 0;
305 cpp_opts
->discard_comments
= 0;
306 cpp_opts
->discard_comments_in_macro_exp
= 0;
310 defer_opt (code
, arg
);
314 cpp_opts
->print_include_names
= 1;
318 TARGET_OPTF (xstrdup (arg
));
322 if (strcmp (arg
, "-"))
323 add_path (xstrdup (arg
), INC_BRACKET
, 0, true);
326 if (quote_chain_split
)
327 error ("%<-I-%> specified twice");
328 quote_chain_split
= true;
329 split_quote_chain ();
330 inform (input_location
, "obsolete option %<-I-%> used, "
331 "please use %<-iquote%> instead");
337 /* When doing dependencies with -M or -MM, suppress normal
338 preprocessed output, but still do -dM etc. as software
339 depends on this. Preprocessed output does occur if -MD, -MMD
340 or environment var dependency generation is used. */
341 cpp_opts
->deps
.style
= (code
== OPT_M
? DEPS_SYSTEM
: DEPS_USER
);
347 cpp_opts
->deps
.style
= (code
== OPT_MD
? DEPS_SYSTEM
: DEPS_USER
);
348 cpp_opts
->deps
.need_preprocessor_output
= true;
359 cpp_opts
->deps
.missing_files
= true;
364 cpp_opts
->deps
.phony_targets
= true;
370 defer_opt (code
, arg
);
374 flag_no_line_commands
= 1;
378 defer_opt (code
, arg
);
382 /* ??? Don't add new options here. Use LangEnabledBy in c.opt. */
384 cpp_opts
->warn_num_sign_change
= value
;
387 case OPT_Wunknown_pragmas
:
388 /* Set to greater than 1, so that even unknown pragmas in
389 system headers will be warned about. */
390 /* ??? There is no way to handle this automatically for now. */
391 warn_unknown_pragmas
= value
* 2;
395 if (!c_dialect_cxx ())
396 set_std_c89 (false, true);
398 set_std_cxx98 (true);
409 warning (0, "%<-Wabi=1%> is not supported, using =2");
412 warn_abi_version
= value
;
415 case OPT_fcanonical_system_headers
:
416 cpp_opts
->canonical_system_headers
= value
;
419 case OPT_fcond_mismatch
:
420 if (!c_dialect_cxx ())
422 flag_cond_mismatch
= value
;
425 warning (0, "switch %qs is no longer supported", option
->opt_text
);
432 disable_builtin_function (arg
);
435 case OPT_fdirectives_only
:
436 cpp_opts
->directives_only
= value
;
439 case OPT_fdollars_in_identifiers
:
440 cpp_opts
->dollars_in_ident
= value
;
443 case OPT_fmacro_prefix_map_
:
444 add_macro_prefix_map (arg
);
447 case OPT_ffreestanding
:
452 flag_no_builtin
= !value
;
455 case OPT_fconstant_string_class_
:
456 constant_string_class_name
= arg
;
459 case OPT_fextended_identifiers
:
460 cpp_opts
->extended_identifiers
= value
;
463 case OPT_fmax_include_depth_
:
464 cpp_opts
->max_include_depth
= value
;
467 case OPT_foperator_names
:
468 cpp_opts
->operator_names
= value
;
472 cpp_opts
->restore_pch_deps
= value
;
475 case OPT_fpch_preprocess
:
476 flag_pch_preprocess
= value
;
479 case OPT_fpermissive
:
480 flag_permissive
= value
;
481 global_dc
->permissive
= value
;
484 case OPT_fpreprocessed
:
485 cpp_opts
->preprocessed
= value
;
492 case OPT_ftrack_macro_expansion
:
497 case OPT_ftrack_macro_expansion_
:
498 if (arg
&& *arg
!= '\0')
499 cpp_opts
->track_macro_expansion
= value
;
501 cpp_opts
->track_macro_expansion
= 2;
505 flag_use_repository
= value
;
507 flag_implicit_templates
= 0;
511 /* It is documented that we silently ignore silly values. */
512 if (value
>= 1 && value
<= 100)
513 cpp_opts
->tabstop
= value
;
516 case OPT_fexec_charset_
:
517 cpp_opts
->narrow_charset
= arg
;
520 case OPT_fwide_exec_charset_
:
521 cpp_opts
->wide_charset
= arg
;
524 case OPT_finput_charset_
:
525 cpp_opts
->input_charset
= arg
;
528 case OPT_ftemplate_depth_
:
529 max_tinst_depth
= value
;
532 case OPT_fvisibility_inlines_hidden
:
533 visibility_options
.inlines_hidden
= value
;
536 case OPT_femit_struct_debug_baseonly
:
537 set_struct_debug_option (&global_options
, loc
, "base");
540 case OPT_femit_struct_debug_reduced
:
541 set_struct_debug_option (&global_options
, loc
,
542 "dir:ord:sys,dir:gen:any,ind:base");
545 case OPT_femit_struct_debug_detailed_
:
546 set_struct_debug_option (&global_options
, loc
, arg
);
549 case OPT_fext_numeric_literals
:
550 cpp_opts
->ext_numeric_literals
= value
;
554 add_path (xstrdup (arg
), INC_AFTER
, 0, true);
559 defer_opt (code
, arg
);
571 add_path (xstrdup (arg
), INC_QUOTE
, 0, true);
579 add_path (xstrdup (arg
), INC_SYSTEM
, 0, true);
582 case OPT_iwithprefix
:
583 add_prefixed_path (arg
, INC_SYSTEM
);
586 case OPT_iwithprefixbefore
:
587 add_prefixed_path (arg
, INC_BRACKET
);
591 cpp_set_lang (parse_in
, CLK_ASM
);
592 cpp_opts
->dollars_in_ident
= false;
607 error ("output filename specified twice");
610 case OPT_print_objc_runtime_info
:
611 print_struct_values
= 1;
619 case OPT_std_gnu__98
:
620 if (!preprocessing_asm_p
)
621 set_std_cxx98 (code
== OPT_std_c__98
/* ISO */);
625 case OPT_std_gnu__11
:
626 if (!preprocessing_asm_p
)
627 set_std_cxx11 (code
== OPT_std_c__11
/* ISO */);
631 case OPT_std_gnu__14
:
632 if (!preprocessing_asm_p
)
633 set_std_cxx14 (code
== OPT_std_c__14
/* ISO */);
637 case OPT_std_gnu__17
:
638 if (!preprocessing_asm_p
)
639 set_std_cxx17 (code
== OPT_std_c__17
/* ISO */);
643 case OPT_std_gnu__2a
:
644 if (!preprocessing_asm_p
)
645 set_std_cxx2a (code
== OPT_std_c__2a
/* ISO */);
649 case OPT_std_iso9899_199409
:
650 if (!preprocessing_asm_p
)
651 set_std_c89 (code
== OPT_std_iso9899_199409
/* c94 */, true /* ISO */);
655 if (!preprocessing_asm_p
)
656 set_std_c89 (false /* c94 */, false /* ISO */);
660 if (!preprocessing_asm_p
)
661 set_std_c99 (true /* ISO */);
665 if (!preprocessing_asm_p
)
666 set_std_c99 (false /* ISO */);
670 if (!preprocessing_asm_p
)
671 set_std_c11 (true /* ISO */);
675 if (!preprocessing_asm_p
)
676 set_std_c11 (false /* ISO */);
680 if (!preprocessing_asm_p
)
681 set_std_c17 (true /* ISO */);
685 if (!preprocessing_asm_p
)
686 set_std_c17 (false /* ISO */);
690 if (!preprocessing_asm_p
)
691 set_std_c2x (true /* ISO */);
695 if (!preprocessing_asm_p
)
696 set_std_c2x (false /* ISO */);
700 cpp_opts
->trigraphs
= 1;
703 case OPT_traditional_cpp
:
704 cpp_opts
->traditional
= 1;
715 C_handle_option_auto (&global_options
, &global_options_set
,
717 c_family_lang_mask
, kind
,
718 loc
, handlers
, global_dc
);
722 ObjC_handle_option_auto (&global_options
, &global_options_set
,
724 c_family_lang_mask
, kind
,
725 loc
, handlers
, global_dc
);
729 CXX_handle_option_auto (&global_options
, &global_options_set
,
731 c_family_lang_mask
, kind
,
732 loc
, handlers
, global_dc
);
736 ObjCXX_handle_option_auto (&global_options
, &global_options_set
,
738 c_family_lang_mask
, kind
,
739 loc
, handlers
, global_dc
);
746 cpp_handle_option_auto (&global_options
, scode
, cpp_opts
);
750 /* Default implementation of TARGET_HANDLE_C_OPTION. */
753 default_handle_c_option (size_t code ATTRIBUTE_UNUSED
,
754 const char *arg ATTRIBUTE_UNUSED
,
755 int value ATTRIBUTE_UNUSED
)
760 /* Post-switch processing. */
762 c_common_post_options (const char **pfilename
)
764 struct cpp_callbacks
*cb
;
766 /* Canonicalize the input and output filenames. */
767 if (in_fnames
== NULL
)
769 in_fnames
= XNEWVEC (const char *, 1);
772 else if (strcmp (in_fnames
[0], "-") == 0)
775 error ("cannot use %<-%> as input filename for a precompiled header");
780 if (out_fname
== NULL
|| !strcmp (out_fname
, "-"))
783 if (cpp_opts
->deps
.style
== DEPS_NONE
)
784 check_deps_environment_vars ();
786 handle_deferred_opts ();
788 sanitize_cpp_opts ();
790 register_include_chains (parse_in
, sysroot
, iprefix
, imultilib
,
791 std_inc
, std_cxx_inc
&& c_dialect_cxx (), verbose
);
793 #ifdef C_COMMON_OVERRIDE_OPTIONS
794 /* Some machines may reject certain combinations of C
795 language-specific options. */
796 C_COMMON_OVERRIDE_OPTIONS
;
799 /* Excess precision other than "fast" requires front-end
801 if (c_dialect_cxx ())
803 if (flag_excess_precision_cmdline
== EXCESS_PRECISION_STANDARD
)
804 sorry ("%<-fexcess-precision=standard%> for C++");
805 flag_excess_precision_cmdline
= EXCESS_PRECISION_FAST
;
807 else if (flag_excess_precision_cmdline
== EXCESS_PRECISION_DEFAULT
)
808 flag_excess_precision_cmdline
= (flag_iso
809 ? EXCESS_PRECISION_STANDARD
810 : EXCESS_PRECISION_FAST
);
812 /* ISO C restricts floating-point expression contraction to within
813 source-language expressions (-ffp-contract=on, currently an alias
814 for -ffp-contract=off). */
817 && (global_options_set
.x_flag_fp_contract_mode
818 == (enum fp_contract_mode
) 0)
819 && flag_unsafe_math_optimizations
== 0)
820 flag_fp_contract_mode
= FP_CONTRACT_OFF
;
822 /* If we are compiling C, and we are outside of a standards mode,
823 we can permit the new values from ISO/IEC TS 18661-3 for
824 FLT_EVAL_METHOD. Otherwise, we must restrict the possible values to
825 the set specified in ISO C99/C11. */
828 && (global_options_set
.x_flag_permitted_flt_eval_methods
829 == PERMITTED_FLT_EVAL_METHODS_DEFAULT
))
830 flag_permitted_flt_eval_methods
= PERMITTED_FLT_EVAL_METHODS_TS_18661
;
832 flag_permitted_flt_eval_methods
= PERMITTED_FLT_EVAL_METHODS_C11
;
834 /* By default we use C99 inline semantics in GNU99 or C99 mode. C99
835 inline semantics are not supported in GNU89 or C89 mode. */
836 if (flag_gnu89_inline
== -1)
837 flag_gnu89_inline
= !flag_isoc99
;
838 else if (!flag_gnu89_inline
&& !flag_isoc99
)
839 error ("%<-fno-gnu89-inline%> is only supported in GNU99 or C99 mode");
841 /* Default to ObjC sjlj exception handling if NeXT runtime. */
842 if (flag_objc_sjlj_exceptions
< 0)
843 flag_objc_sjlj_exceptions
= flag_next_runtime
;
844 if (flag_objc_exceptions
&& !flag_objc_sjlj_exceptions
)
847 /* If -ffreestanding, -fno-hosted or -fno-builtin then disable
848 pattern recognition. */
849 if (!global_options_set
.x_flag_tree_loop_distribute_patterns
851 flag_tree_loop_distribute_patterns
= 0;
853 /* -Woverlength-strings is off by default, but is enabled by -Wpedantic.
854 It is never enabled in C++, as the minimum limit is not normative
856 if (c_dialect_cxx ())
857 warn_overlength_strings
= 0;
859 /* Wmain is enabled by default in C++ but not in C. */
860 /* Wmain is disabled by default for -ffreestanding (!flag_hosted),
861 even if -Wall or -Wpedantic was given (warn_main will be 2 if set
862 by -Wall, 1 if set by -Wmain). */
864 warn_main
= (c_dialect_cxx () && flag_hosted
) ? 1 : 0;
865 else if (warn_main
== 2)
866 warn_main
= flag_hosted
? 1 : 0;
868 /* In C, -Wall and -Wc++-compat enable -Wenum-compare; if it has not
869 yet been set, it is disabled by default. In C++, it is enabled
871 if (warn_enum_compare
== -1)
872 warn_enum_compare
= c_dialect_cxx () ? 1 : 0;
874 /* -Wpacked-bitfield-compat is on by default for the C languages. The
875 warning is issued in stor-layout.c which is not part of the front-end so
876 we need to selectively turn it on here. */
877 if (warn_packed_bitfield_compat
== -1)
878 warn_packed_bitfield_compat
= 1;
880 /* Special format checking options don't work without -Wformat; warn if
884 warning (OPT_Wformat_y2k
,
885 "%<-Wformat-y2k%> ignored without %<-Wformat%>");
886 warning (OPT_Wformat_extra_args
,
887 "%<-Wformat-extra-args%> ignored without %<-Wformat%>");
888 warning (OPT_Wformat_zero_length
,
889 "%<-Wformat-zero-length%> ignored without %<-Wformat%>");
890 warning (OPT_Wformat_nonliteral
,
891 "%<-Wformat-nonliteral%> ignored without %<-Wformat%>");
892 warning (OPT_Wformat_contains_nul
,
893 "%<-Wformat-contains-nul%> ignored without %<-Wformat%>");
894 warning (OPT_Wformat_security
,
895 "%<-Wformat-security%> ignored without %<-Wformat%>");
898 /* -Wimplicit-function-declaration is enabled by default for C99. */
899 if (warn_implicit_function_declaration
== -1)
900 warn_implicit_function_declaration
= flag_isoc99
;
902 /* -Wimplicit-int is enabled by default for C99. */
903 if (warn_implicit_int
== -1)
904 warn_implicit_int
= flag_isoc99
;
906 /* -Wshift-overflow is enabled by default in C99 and C++11 modes. */
907 if (warn_shift_overflow
== -1)
908 warn_shift_overflow
= cxx_dialect
>= cxx11
|| flag_isoc99
;
910 /* -Wshift-negative-value is enabled by -Wextra in C99 and C++11 modes. */
911 if (warn_shift_negative_value
== -1)
912 warn_shift_negative_value
= (extra_warnings
913 && (cxx_dialect
>= cxx11
|| flag_isoc99
));
915 /* -Wregister is enabled by default in C++17. */
916 if (!global_options_set
.x_warn_register
)
917 warn_register
= cxx_dialect
>= cxx17
;
919 /* Declone C++ 'structors if -Os. */
920 if (flag_declone_ctor_dtor
== -1)
921 flag_declone_ctor_dtor
= optimize_size
;
923 if (flag_abi_compat_version
== 1)
925 warning (0, "%<-fabi-compat-version=1%> is not supported, using =2");
926 flag_abi_compat_version
= 2;
929 /* Change flag_abi_version to be the actual current ABI level, for the
930 benefit of c_cpp_builtins, and to make comparison simpler. */
931 const int latest_abi_version
= 13;
932 /* Generate compatibility aliases for ABI v11 (7.1) by default. */
933 const int abi_compat_default
= 11;
935 #define clamp(X) if (X == 0 || X > latest_abi_version) X = latest_abi_version
936 clamp (flag_abi_version
);
937 clamp (warn_abi_version
);
938 clamp (flag_abi_compat_version
);
941 /* Default -Wabi= or -fabi-compat-version= from each other. */
942 if (warn_abi_version
== -1 && flag_abi_compat_version
!= -1)
943 warn_abi_version
= flag_abi_compat_version
;
944 else if (flag_abi_compat_version
== -1 && warn_abi_version
!= -1)
945 flag_abi_compat_version
= warn_abi_version
;
946 else if (warn_abi_version
== -1 && flag_abi_compat_version
== -1)
948 warn_abi_version
= latest_abi_version
;
949 if (flag_abi_version
== latest_abi_version
)
951 auto_diagnostic_group d
;
952 if (warning (OPT_Wabi
, "%<-Wabi%> won%'t warn about anything"))
954 inform (input_location
, "%<-Wabi%> warns about differences "
955 "from the most up-to-date ABI, which is also used "
957 inform (input_location
, "use e.g. %<-Wabi=11%> to warn about "
958 "changes from GCC 7");
960 flag_abi_compat_version
= abi_compat_default
;
963 flag_abi_compat_version
= latest_abi_version
;
966 /* By default, enable the new inheriting constructor semantics along with ABI
967 11. New and old should coexist fine, but it is a change in what
968 artificial symbols are generated. */
969 if (!global_options_set
.x_flag_new_inheriting_ctors
)
970 flag_new_inheriting_ctors
= abi_version_at_least (11);
972 /* For GCC 7, only enable DR150 resolution by default if -std=c++17. */
973 if (!global_options_set
.x_flag_new_ttp
)
974 flag_new_ttp
= (cxx_dialect
>= cxx17
);
976 if (cxx_dialect
>= cxx11
)
978 /* If we're allowing C++0x constructs, don't warn about C++98
979 identifiers which are keywords in C++0x. */
980 warn_cxx11_compat
= 0;
981 cpp_opts
->cpp_warn_cxx11_compat
= 0;
983 if (warn_narrowing
== -1)
986 /* Unless -f{,no-}ext-numeric-literals has been used explicitly,
987 for -std=c++{11,14,17,2a} default to -fno-ext-numeric-literals. */
988 if (flag_iso
&& !global_options_set
.x_flag_ext_numeric_literals
)
989 cpp_opts
->ext_numeric_literals
= 0;
991 else if (warn_narrowing
== -1)
994 /* C++17 has stricter evaluation order requirements; let's use some of them
995 for earlier C++ as well, so chaining works as expected. */
997 && flag_strong_eval_order
== -1)
998 flag_strong_eval_order
= (cxx_dialect
>= cxx17
? 2 : 1);
1000 /* Global sized deallocation is new in C++14. */
1001 if (flag_sized_deallocation
== -1)
1002 flag_sized_deallocation
= (cxx_dialect
>= cxx14
);
1004 /* char8_t support is new in C++2A. */
1005 if (flag_char8_t
== -1)
1006 flag_char8_t
= (cxx_dialect
>= cxx2a
);
1008 if (flag_extern_tls_init
)
1010 if (!TARGET_SUPPORTS_ALIASES
|| !SUPPORTS_WEAK
)
1012 /* Lazy TLS initialization for a variable in another TU requires
1013 alias and weak reference support. */
1014 if (flag_extern_tls_init
> 0)
1015 sorry ("external TLS initialization functions not supported "
1018 flag_extern_tls_init
= 0;
1021 flag_extern_tls_init
= 1;
1024 /* Enable by default only for C++ and C++ with ObjC extensions. */
1025 if (warn_return_type
== -1 && c_dialect_cxx ())
1026 warn_return_type
= 1;
1028 if (num_in_fnames
> 1)
1029 error ("too many filenames given; type %<%s %s%> for usage",
1030 progname
, "--help");
1032 if (flag_preprocess_only
)
1034 /* Open the output now. We must do so even if flag_no_output is
1035 on, because there may be other output than from the actual
1036 preprocessing (e.g. from -dM). */
1037 if (out_fname
[0] == '\0')
1038 out_stream
= stdout
;
1040 out_stream
= fopen (out_fname
, "w");
1042 if (out_stream
== NULL
)
1044 fatal_error (input_location
, "opening output file %s: %m", out_fname
);
1048 init_pp_output (out_stream
);
1054 /* When writing a PCH file, avoid reading some other PCH file,
1055 because the default address space slot then can't be used
1056 for the output PCH file. */
1059 c_common_no_more_pch ();
1060 /* Only -g0 and -gdwarf* are supported with PCH, for other
1061 debug formats we warn here and refuse to load any PCH files. */
1062 if (write_symbols
!= NO_DEBUG
&& write_symbols
!= DWARF2_DEBUG
)
1063 warning (OPT_Wdeprecated
,
1064 "the %qs debug format cannot be used with "
1065 "pre-compiled headers", debug_type_names
[write_symbols
]);
1067 else if (write_symbols
!= NO_DEBUG
&& write_symbols
!= DWARF2_DEBUG
)
1068 c_common_no_more_pch ();
1070 /* Yuk. WTF is this? I do know ObjC relies on it somewhere. */
1071 input_location
= UNKNOWN_LOCATION
;
1074 cb
= cpp_get_callbacks (parse_in
);
1075 cb
->file_change
= cb_file_change
;
1076 cb
->dir_change
= cb_dir_change
;
1077 cpp_post_options (parse_in
);
1078 init_global_opts_from_cpp (&global_options
, cpp_get_options (parse_in
));
1080 input_location
= UNKNOWN_LOCATION
;
1082 *pfilename
= this_input_filename
1083 = cpp_read_main_file (parse_in
, in_fnames
[0]);
1084 /* Don't do any compilation or preprocessing if there is no input file. */
1085 if (this_input_filename
== NULL
)
1091 if (flag_working_directory
1092 && flag_preprocess_only
&& !flag_no_line_commands
)
1093 pp_dir_change (parse_in
, get_src_pwd ());
1095 /* Disable LTO output when outputting a precompiled header. */
1096 if (pch_file
&& flag_lto
)
1099 flag_generate_lto
= 0;
1102 return flag_preprocess_only
;
1105 /* Front end initialization common to C, ObjC and C++. */
1107 c_common_init (void)
1109 /* Set up preprocessor arithmetic. Must be done after call to
1110 c_common_nodes_and_builtins for type nodes to be good. */
1111 cpp_opts
->precision
= TYPE_PRECISION (intmax_type_node
);
1112 cpp_opts
->char_precision
= TYPE_PRECISION (char_type_node
);
1113 cpp_opts
->int_precision
= TYPE_PRECISION (integer_type_node
);
1114 cpp_opts
->wchar_precision
= TYPE_PRECISION (wchar_type_node
);
1115 cpp_opts
->unsigned_wchar
= TYPE_UNSIGNED (wchar_type_node
);
1116 cpp_opts
->bytes_big_endian
= BYTES_BIG_ENDIAN
;
1118 /* This can't happen until after wchar_precision and bytes_big_endian
1120 cpp_init_iconv (parse_in
);
1125 fputs ("Compiler executable checksum: ", stderr
);
1126 for (i
= 0; i
< 16; i
++)
1127 fprintf (stderr
, "%02x", executable_checksum
[i
]);
1128 putc ('\n', stderr
);
1131 /* Has to wait until now so that cpplib has its hash table. */
1134 if (flag_preprocess_only
)
1136 c_finish_options ();
1137 preprocess_file (parse_in
);
1144 /* Initialize the integrated preprocessor after debug output has been
1145 initialized; loop over each input file. */
1147 c_common_parse_file (void)
1154 c_finish_options ();
1155 /* Open the dump file to use for the original dump output
1156 here, to be used during parsing for the current file. */
1157 original_dump_file
= dump_begin (TDI_original
, &original_dump_flags
);
1162 /* And end the main input file, if the debug writer wants it */
1163 if (debug_hooks
->start_end_main_source_file
)
1164 (*debug_hooks
->end_source_file
) (0);
1165 if (++i
>= num_in_fnames
)
1167 cpp_undef_all (parse_in
);
1168 cpp_clear_file_cache (parse_in
);
1170 = cpp_read_main_file (parse_in
, in_fnames
[i
]);
1171 if (original_dump_file
)
1173 dump_end (TDI_original
, original_dump_file
);
1174 original_dump_file
= NULL
;
1176 /* If an input file is missing, abandon further compilation.
1177 cpplib has issued a diagnostic. */
1178 if (!this_input_filename
)
1182 c_parse_final_cleanups ();
1185 /* Returns the appropriate dump file for PHASE to dump with FLAGS. */
1188 get_dump_info (int phase
, dump_flags_t
*flags
)
1190 gcc_assert (phase
== TDI_original
);
1192 *flags
= original_dump_flags
;
1193 return original_dump_file
;
1196 /* Common finish hook for the C, ObjC and C++ front ends. */
1198 c_common_finish (void)
1200 FILE *deps_stream
= NULL
;
1202 /* Note that we write the dependencies even if there are errors. This is
1203 useful for handling outdated generated headers that now trigger errors
1204 (for example, with #error) which would be resolved by re-generating
1205 them. In a sense, this complements -MG. */
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
;
1212 else if (deps_file
[0] == '-' && deps_file
[1] == '\0')
1213 deps_stream
= stdout
;
1216 deps_stream
= fopen (deps_file
, deps_append
? "a": "w");
1218 fatal_error (input_location
, "opening dependency file %s: %m",
1223 /* For performance, avoid tearing down cpplib's internal structures
1224 with cpp_destroy (). */
1225 cpp_finish (parse_in
, deps_stream
);
1227 if (deps_stream
&& deps_stream
!= out_stream
&& deps_stream
!= stdout
1228 && (ferror (deps_stream
) || fclose (deps_stream
)))
1229 fatal_error (input_location
, "closing dependency file %s: %m", deps_file
);
1231 if (out_stream
&& (ferror (out_stream
) || fclose (out_stream
)))
1232 fatal_error (input_location
, "when writing output to %s: %m", out_fname
);
1235 /* Either of two environment variables can specify output of
1236 dependencies. Their value is either "OUTPUT_FILE" or "OUTPUT_FILE
1237 DEPS_TARGET", where OUTPUT_FILE is the file to write deps info to
1238 and DEPS_TARGET is the target to mention in the deps. They also
1239 result in dependency information being appended to the output file
1240 rather than overwriting it, and like Sun's compiler
1241 SUNPRO_DEPENDENCIES suppresses the dependency on the main file. */
1243 check_deps_environment_vars (void)
1247 spec
= getenv ("DEPENDENCIES_OUTPUT");
1249 cpp_opts
->deps
.style
= DEPS_USER
;
1252 spec
= getenv ("SUNPRO_DEPENDENCIES");
1255 cpp_opts
->deps
.style
= DEPS_SYSTEM
;
1256 cpp_opts
->deps
.ignore_main_file
= true;
1262 /* Find the space before the DEPS_TARGET, if there is one. */
1263 char *s
= strchr (spec
, ' ');
1266 /* Let the caller perform MAKE quoting. */
1267 defer_opt (OPT_MT
, s
+ 1);
1271 /* Command line -MF overrides environment variables and default. */
1280 /* Handle deferred command line switches. */
1282 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 struct mkdeps
*deps
= cpp_get_deps (parse_in
);
1292 for (size_t 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%> "
1312 /* -dM and dependencies suppress normal output; do it here so that
1313 the last -d[MDN] switch overrides earlier ones. */
1314 if (flag_dump_macros
== 'M')
1317 /* By default, -fdirectives-only implies -dD. This allows subsequent phases
1318 to perform proper macro expansion. */
1319 if (cpp_opts
->directives_only
&& !cpp_opts
->preprocessed
&& !flag_dump_macros
)
1320 flag_dump_macros
= 'D';
1322 /* Disable -dD, -dN and -dI if normal output is suppressed. Allow
1323 -dM since at least glibc relies on -M -dM to work. */
1324 /* Also, flag_no_output implies flag_no_line_commands, always. */
1327 if (flag_dump_macros
!= 'M')
1328 flag_dump_macros
= 0;
1329 flag_dump_includes
= 0;
1330 flag_no_line_commands
= 1;
1332 else if (cpp_opts
->deps
.missing_files
)
1333 error ("%<-MG%> may only be used with %<-M%> or %<-MM%>");
1335 cpp_opts
->unsigned_char
= !flag_signed_char
;
1336 cpp_opts
->stdc_0_in_system_headers
= STDC_0_IN_SYSTEM_HEADERS
;
1338 /* Wlong-long is disabled by default. It is enabled by:
1339 [-Wpedantic | -Wtraditional] -std=[gnu|c]++98 ; or
1340 [-Wpedantic | -Wtraditional] -std=non-c99
1342 Either -Wlong-long or -Wno-long-long override any other settings.
1343 ??? These conditions should be handled in c.opt. */
1344 if (warn_long_long
== -1)
1346 warn_long_long
= ((pedantic
|| warn_traditional
)
1347 && (c_dialect_cxx () ? cxx_dialect
== cxx98
: !flag_isoc99
));
1348 cpp_opts
->cpp_warn_long_long
= warn_long_long
;
1351 /* If we're generating preprocessor output, emit current directory
1352 if explicitly requested or if debugging information is enabled.
1353 ??? Maybe we should only do it for debugging formats that
1354 actually output the current directory? */
1355 if (flag_working_directory
== -1)
1356 flag_working_directory
= (debug_info_level
!= DINFO_LEVEL_NONE
);
1358 if (warn_implicit_fallthrough
< 5)
1359 cpp_opts
->cpp_warn_implicit_fallthrough
= warn_implicit_fallthrough
;
1361 cpp_opts
->cpp_warn_implicit_fallthrough
= 0;
1363 if (cpp_opts
->directives_only
)
1365 if (cpp_warn_unused_macros
)
1366 error ("%<-fdirectives-only%> is incompatible "
1367 "with %<-Wunused-macros%>");
1368 if (cpp_opts
->traditional
)
1369 error ("%<-fdirectives-only%> is incompatible with %<-traditional%>");
1373 /* Add include path with a prefix at the front of its name. */
1375 add_prefixed_path (const char *suffix
, incpath_kind chain
)
1379 size_t prefix_len
, suffix_len
;
1381 suffix_len
= strlen (suffix
);
1382 prefix
= iprefix
? iprefix
: cpp_GCC_INCLUDE_DIR
;
1383 prefix_len
= iprefix
? strlen (iprefix
) : cpp_GCC_INCLUDE_DIR_len
;
1385 path
= (char *) xmalloc (prefix_len
+ suffix_len
+ 1);
1386 memcpy (path
, prefix
, prefix_len
);
1387 memcpy (path
+ prefix_len
, suffix
, suffix_len
);
1388 path
[prefix_len
+ suffix_len
] = '\0';
1390 add_path (path
, chain
, 0, false);
1393 /* Handle -D, -U, -A, -imacros, and the first -include. */
1395 c_finish_options (void)
1397 if (!cpp_opts
->preprocessed
)
1399 const line_map_ordinary
*bltin_map
1400 = linemap_check_ordinary (linemap_add (line_table
, LC_RENAME
, 0,
1401 _("<built-in>"), 0));
1402 cb_file_change (parse_in
, bltin_map
);
1404 /* Make sure all of the builtins about to be declared have
1405 BUILTINS_LOCATION has their location_t. */
1406 cpp_force_token_locations (parse_in
, BUILTINS_LOCATION
);
1408 cpp_init_builtins (parse_in
, flag_hosted
);
1409 c_cpp_builtins (parse_in
);
1411 /* We're about to send user input to cpplib, so make it warn for
1412 things that we previously (when we sent it internal definitions)
1413 told it to not warn.
1415 C99 permits implementation-defined characters in identifiers.
1416 The documented meaning of -std= is to turn off extensions that
1417 conflict with the specified standard, and since a strictly
1418 conforming program cannot contain a '$', we do not condition
1419 their acceptance on the -std= setting. */
1420 cpp_opts
->warn_dollars
= (cpp_opts
->cpp_pedantic
&& !cpp_opts
->c99
);
1422 const line_map_ordinary
*cmd_map
1423 = linemap_check_ordinary (linemap_add (line_table
, LC_RENAME
, 0,
1424 _("<command-line>"), 0));
1425 cb_file_change (parse_in
, cmd_map
);
1427 /* All command line defines must have the same location. */
1428 cpp_force_token_locations (parse_in
, cmd_map
->start_location
);
1429 for (size_t i
= 0; i
< deferred_count
; i
++)
1431 struct deferred_opt
*opt
= &deferred_opts
[i
];
1433 if (opt
->code
== OPT_D
)
1434 cpp_define (parse_in
, opt
->arg
);
1435 else if (opt
->code
== OPT_U
)
1436 cpp_undef (parse_in
, opt
->arg
);
1437 else if (opt
->code
== OPT_A
)
1439 if (opt
->arg
[0] == '-')
1440 cpp_unassert (parse_in
, opt
->arg
+ 1);
1442 cpp_assert (parse_in
, opt
->arg
);
1446 cpp_stop_forcing_token_locations (parse_in
);
1448 else if (cpp_opts
->directives_only
)
1449 cpp_init_special_builtins (parse_in
);
1451 /* Start the main input file, if the debug writer wants it. */
1452 if (debug_hooks
->start_end_main_source_file
1453 && !flag_preprocess_only
)
1454 (*debug_hooks
->start_source_file
) (0, this_input_filename
);
1456 if (!cpp_opts
->preprocessed
)
1457 /* Handle -imacros after -D and -U. */
1458 for (size_t i
= 0; i
< deferred_count
; i
++)
1460 struct deferred_opt
*opt
= &deferred_opts
[i
];
1462 if (opt
->code
== OPT_imacros
1463 && cpp_push_include (parse_in
, opt
->arg
))
1465 /* Disable push_command_line_include callback for now. */
1466 include_cursor
= deferred_count
+ 1;
1467 cpp_scan_nooutput (parse_in
);
1472 push_command_line_include ();
1475 /* Give CPP the next file given by -include, if any. */
1477 push_command_line_include (void)
1479 /* This can happen if disabled by -imacros for example.
1480 Punt so that we don't set "<command-line>" as the filename for
1482 if (include_cursor
> deferred_count
)
1485 if (!done_preinclude
)
1487 done_preinclude
= true;
1488 if (flag_hosted
&& std_inc
&& !cpp_opts
->preprocessed
)
1490 const char *preinc
= targetcm
.c_preinclude ();
1491 if (preinc
&& cpp_push_default_include (parse_in
, preinc
))
1496 pch_cpp_save_state ();
1498 while (include_cursor
< deferred_count
)
1500 struct deferred_opt
*opt
= &deferred_opts
[include_cursor
++];
1502 if (!cpp_opts
->preprocessed
&& opt
->code
== OPT_include
1503 && cpp_push_include (parse_in
, opt
->arg
))
1507 if (include_cursor
== deferred_count
)
1510 /* -Wunused-macros should only warn about macros defined hereafter. */
1511 cpp_opts
->warn_unused_macros
= cpp_warn_unused_macros
;
1512 /* Restore the line map back to the main file. */
1513 if (!cpp_opts
->preprocessed
)
1514 cpp_change_file (parse_in
, LC_RENAME
, this_input_filename
);
1516 /* Set this here so the client can change the option if it wishes,
1517 and after stacking the main file so we don't trace the main file. */
1518 line_table
->trace_includes
= cpp_opts
->print_include_names
;
1522 /* File change callback. Has to handle -include files. */
1524 cb_file_change (cpp_reader
* ARG_UNUSED (pfile
),
1525 const line_map_ordinary
*new_map
)
1527 if (flag_preprocess_only
)
1528 pp_file_change (new_map
);
1530 fe_file_change (new_map
);
1533 && (new_map
->reason
== LC_ENTER
|| new_map
->reason
== LC_RENAME
))
1535 /* Signal to plugins that a file is included. This could happen
1536 several times with the same file path, e.g. because of
1537 several '#include' or '#line' directives... */
1538 invoke_plugin_callbacks
1539 (PLUGIN_INCLUDE_FILE
,
1540 const_cast<char*> (ORDINARY_MAP_FILE_NAME (new_map
)));
1543 if (new_map
== 0 || (new_map
->reason
== LC_LEAVE
&& MAIN_FILE_P (new_map
)))
1545 pch_cpp_save_state ();
1546 push_command_line_include ();
1551 cb_dir_change (cpp_reader
* ARG_UNUSED (pfile
), const char *dir
)
1553 if (!set_src_pwd (dir
))
1554 warning (0, "too late for # directive to set debug directory");
1557 /* Set the C 89 standard (with 1994 amendments if C94, without GNU
1558 extensions if ISO). There is no concept of gnu94. */
1560 set_std_c89 (int c94
, int iso
)
1562 cpp_set_lang (parse_in
, c94
? CLK_STDC94
: iso
? CLK_STDC89
: CLK_GNUC89
);
1565 flag_no_gnu_keywords
= iso
;
1566 flag_no_nonansi_builtin
= iso
;
1571 lang_hooks
.name
= "GNU C89";
1574 /* Set the C 99 standard (without GNU extensions if ISO). */
1576 set_std_c99 (int iso
)
1578 cpp_set_lang (parse_in
, iso
? CLK_STDC99
: CLK_GNUC99
);
1580 flag_no_nonansi_builtin
= iso
;
1586 lang_hooks
.name
= "GNU C99";
1589 /* Set the C 11 standard (without GNU extensions if ISO). */
1591 set_std_c11 (int iso
)
1593 cpp_set_lang (parse_in
, iso
? CLK_STDC11
: CLK_GNUC11
);
1595 flag_no_nonansi_builtin
= iso
;
1601 lang_hooks
.name
= "GNU C11";
1604 /* Set the C 17 standard (without GNU extensions if ISO). */
1606 set_std_c17 (int iso
)
1608 cpp_set_lang (parse_in
, iso
? CLK_STDC17
: CLK_GNUC17
);
1610 flag_no_nonansi_builtin
= iso
;
1616 lang_hooks
.name
= "GNU C17";
1619 /* Set the C 2X standard (without GNU extensions if ISO). */
1621 set_std_c2x (int iso
)
1623 cpp_set_lang (parse_in
, iso
? CLK_STDC2X
: CLK_GNUC2X
);
1625 flag_no_nonansi_builtin
= iso
;
1631 lang_hooks
.name
= "GNU C2X";
1635 /* Set the C++ 98 standard (without GNU extensions if ISO). */
1637 set_std_cxx98 (int iso
)
1639 cpp_set_lang (parse_in
, iso
? CLK_CXX98
: CLK_GNUCXX
);
1640 flag_no_gnu_keywords
= iso
;
1641 flag_no_nonansi_builtin
= iso
;
1645 cxx_dialect
= cxx98
;
1646 lang_hooks
.name
= "GNU C++98";
1649 /* Set the C++ 2011 standard (without GNU extensions if ISO). */
1651 set_std_cxx11 (int iso
)
1653 cpp_set_lang (parse_in
, iso
? CLK_CXX11
: CLK_GNUCXX11
);
1654 flag_no_gnu_keywords
= iso
;
1655 flag_no_nonansi_builtin
= iso
;
1657 /* C++11 includes the C99 standard library. */
1660 cxx_dialect
= cxx11
;
1661 lang_hooks
.name
= "GNU C++11";
1664 /* Set the C++ 2014 standard (without GNU extensions if ISO). */
1666 set_std_cxx14 (int iso
)
1668 cpp_set_lang (parse_in
, iso
? CLK_CXX14
: CLK_GNUCXX14
);
1669 flag_no_gnu_keywords
= iso
;
1670 flag_no_nonansi_builtin
= iso
;
1672 /* C++14 includes the C99 standard library. */
1675 cxx_dialect
= cxx14
;
1676 lang_hooks
.name
= "GNU C++14";
1679 /* Set the C++ 2017 standard (without GNU extensions if ISO). */
1681 set_std_cxx17 (int iso
)
1683 cpp_set_lang (parse_in
, iso
? CLK_CXX17
: CLK_GNUCXX17
);
1684 flag_no_gnu_keywords
= iso
;
1685 flag_no_nonansi_builtin
= iso
;
1687 /* C++17 includes the C11 standard library. */
1691 cxx_dialect
= cxx17
;
1692 lang_hooks
.name
= "GNU C++17";
1695 /* Set the C++ 202a draft standard (without GNU extensions if ISO). */
1697 set_std_cxx2a (int iso
)
1699 cpp_set_lang (parse_in
, iso
? CLK_CXX2A
: CLK_GNUCXX2A
);
1700 flag_no_gnu_keywords
= iso
;
1701 flag_no_nonansi_builtin
= iso
;
1703 /* C++17 includes the C11 standard library. */
1707 cxx_dialect
= cxx2a
;
1708 lang_hooks
.name
= "GNU C++17"; /* Pretend C++17 until standardization. */
1711 /* Args to -d specify what to dump. Silently ignore
1712 unrecognized options; they may be aimed at toplev.c. */
1714 handle_OPT_d (const char *arg
)
1718 while ((c
= *arg
++) != '\0')
1721 case 'M': /* Dump macros only. */
1722 case 'N': /* Dump names. */
1723 case 'D': /* Dump definitions. */
1724 case 'U': /* Dump used macros. */
1725 flag_dump_macros
= c
;
1729 flag_dump_includes
= 1;