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 /* It is documented that we silently ignore silly values. */
506 if (value
>= 1 && value
<= 100)
507 cpp_opts
->tabstop
= value
;
510 case OPT_fexec_charset_
:
511 cpp_opts
->narrow_charset
= arg
;
514 case OPT_fwide_exec_charset_
:
515 cpp_opts
->wide_charset
= arg
;
518 case OPT_finput_charset_
:
519 cpp_opts
->input_charset
= arg
;
522 case OPT_ftemplate_depth_
:
523 max_tinst_depth
= value
;
526 case OPT_fvisibility_inlines_hidden
:
527 visibility_options
.inlines_hidden
= value
;
530 case OPT_femit_struct_debug_baseonly
:
531 set_struct_debug_option (&global_options
, loc
, "base");
534 case OPT_femit_struct_debug_reduced
:
535 set_struct_debug_option (&global_options
, loc
,
536 "dir:ord:sys,dir:gen:any,ind:base");
539 case OPT_femit_struct_debug_detailed_
:
540 set_struct_debug_option (&global_options
, loc
, arg
);
543 case OPT_fext_numeric_literals
:
544 cpp_opts
->ext_numeric_literals
= value
;
548 add_path (xstrdup (arg
), INC_AFTER
, 0, true);
553 defer_opt (code
, arg
);
565 add_path (xstrdup (arg
), INC_QUOTE
, 0, true);
573 add_path (xstrdup (arg
), INC_SYSTEM
, 0, true);
576 case OPT_iwithprefix
:
577 add_prefixed_path (arg
, INC_SYSTEM
);
580 case OPT_iwithprefixbefore
:
581 add_prefixed_path (arg
, INC_BRACKET
);
585 cpp_set_lang (parse_in
, CLK_ASM
);
586 cpp_opts
->dollars_in_ident
= false;
601 error ("output filename specified twice");
604 case OPT_print_objc_runtime_info
:
605 print_struct_values
= 1;
613 case OPT_std_gnu__98
:
614 if (!preprocessing_asm_p
)
615 set_std_cxx98 (code
== OPT_std_c__98
/* ISO */);
619 case OPT_std_gnu__11
:
620 if (!preprocessing_asm_p
)
621 set_std_cxx11 (code
== OPT_std_c__11
/* ISO */);
625 case OPT_std_gnu__14
:
626 if (!preprocessing_asm_p
)
627 set_std_cxx14 (code
== OPT_std_c__14
/* ISO */);
631 case OPT_std_gnu__17
:
632 if (!preprocessing_asm_p
)
633 set_std_cxx17 (code
== OPT_std_c__17
/* ISO */);
637 case OPT_std_gnu__2a
:
638 if (!preprocessing_asm_p
)
639 set_std_cxx2a (code
== OPT_std_c__2a
/* ISO */);
643 case OPT_std_iso9899_199409
:
644 if (!preprocessing_asm_p
)
645 set_std_c89 (code
== OPT_std_iso9899_199409
/* c94 */, true /* ISO */);
649 if (!preprocessing_asm_p
)
650 set_std_c89 (false /* c94 */, false /* ISO */);
654 if (!preprocessing_asm_p
)
655 set_std_c99 (true /* ISO */);
659 if (!preprocessing_asm_p
)
660 set_std_c99 (false /* ISO */);
664 if (!preprocessing_asm_p
)
665 set_std_c11 (true /* ISO */);
669 if (!preprocessing_asm_p
)
670 set_std_c11 (false /* ISO */);
674 if (!preprocessing_asm_p
)
675 set_std_c17 (true /* ISO */);
679 if (!preprocessing_asm_p
)
680 set_std_c17 (false /* ISO */);
684 if (!preprocessing_asm_p
)
685 set_std_c2x (true /* ISO */);
689 if (!preprocessing_asm_p
)
690 set_std_c2x (false /* ISO */);
694 cpp_opts
->trigraphs
= 1;
697 case OPT_traditional_cpp
:
698 cpp_opts
->traditional
= 1;
709 C_handle_option_auto (&global_options
, &global_options_set
,
711 c_family_lang_mask
, kind
,
712 loc
, handlers
, global_dc
);
716 ObjC_handle_option_auto (&global_options
, &global_options_set
,
718 c_family_lang_mask
, kind
,
719 loc
, handlers
, global_dc
);
723 CXX_handle_option_auto (&global_options
, &global_options_set
,
725 c_family_lang_mask
, kind
,
726 loc
, handlers
, global_dc
);
730 ObjCXX_handle_option_auto (&global_options
, &global_options_set
,
732 c_family_lang_mask
, kind
,
733 loc
, handlers
, global_dc
);
740 cpp_handle_option_auto (&global_options
, scode
, cpp_opts
);
744 /* Default implementation of TARGET_HANDLE_C_OPTION. */
747 default_handle_c_option (size_t code ATTRIBUTE_UNUSED
,
748 const char *arg ATTRIBUTE_UNUSED
,
749 int value ATTRIBUTE_UNUSED
)
754 /* Post-switch processing. */
756 c_common_post_options (const char **pfilename
)
758 struct cpp_callbacks
*cb
;
760 /* Canonicalize the input and output filenames. */
761 if (in_fnames
== NULL
)
763 in_fnames
= XNEWVEC (const char *, 1);
766 else if (strcmp (in_fnames
[0], "-") == 0)
769 error ("cannot use %<-%> as input filename for a precompiled header");
774 if (out_fname
== NULL
|| !strcmp (out_fname
, "-"))
777 if (cpp_opts
->deps
.style
== DEPS_NONE
)
778 check_deps_environment_vars ();
780 handle_deferred_opts ();
782 sanitize_cpp_opts ();
784 register_include_chains (parse_in
, sysroot
, iprefix
, imultilib
,
785 std_inc
, std_cxx_inc
&& c_dialect_cxx (), verbose
);
787 #ifdef C_COMMON_OVERRIDE_OPTIONS
788 /* Some machines may reject certain combinations of C
789 language-specific options. */
790 C_COMMON_OVERRIDE_OPTIONS
;
793 /* Excess precision other than "fast" requires front-end
795 if (c_dialect_cxx ())
797 if (flag_excess_precision
== EXCESS_PRECISION_STANDARD
)
798 sorry ("%<-fexcess-precision=standard%> for C++");
799 flag_excess_precision
= EXCESS_PRECISION_FAST
;
801 else if (flag_excess_precision
== EXCESS_PRECISION_DEFAULT
)
802 flag_excess_precision
= (flag_iso
? EXCESS_PRECISION_STANDARD
803 : EXCESS_PRECISION_FAST
);
805 /* ISO C restricts floating-point expression contraction to within
806 source-language expressions (-ffp-contract=on, currently an alias
807 for -ffp-contract=off). */
810 && (global_options_set
.x_flag_fp_contract_mode
811 == (enum fp_contract_mode
) 0)
812 && flag_unsafe_math_optimizations
== 0)
813 flag_fp_contract_mode
= FP_CONTRACT_OFF
;
815 /* If we are compiling C, and we are outside of a standards mode,
816 we can permit the new values from ISO/IEC TS 18661-3 for
817 FLT_EVAL_METHOD. Otherwise, we must restrict the possible values to
818 the set specified in ISO C99/C11. */
821 && (global_options_set
.x_flag_permitted_flt_eval_methods
822 == PERMITTED_FLT_EVAL_METHODS_DEFAULT
))
823 flag_permitted_flt_eval_methods
= PERMITTED_FLT_EVAL_METHODS_TS_18661
;
825 flag_permitted_flt_eval_methods
= PERMITTED_FLT_EVAL_METHODS_C11
;
827 /* By default we use C99 inline semantics in GNU99 or C99 mode. C99
828 inline semantics are not supported in GNU89 or C89 mode. */
829 if (flag_gnu89_inline
== -1)
830 flag_gnu89_inline
= !flag_isoc99
;
831 else if (!flag_gnu89_inline
&& !flag_isoc99
)
832 error ("%<-fno-gnu89-inline%> is only supported in GNU99 or C99 mode");
834 /* Default to ObjC sjlj exception handling if NeXT runtime. */
835 if (flag_objc_sjlj_exceptions
< 0)
836 flag_objc_sjlj_exceptions
= flag_next_runtime
;
837 if (flag_objc_exceptions
&& !flag_objc_sjlj_exceptions
)
840 /* If -ffreestanding, -fno-hosted or -fno-builtin then disable
841 pattern recognition. */
842 if (!global_options_set
.x_flag_tree_loop_distribute_patterns
844 flag_tree_loop_distribute_patterns
= 0;
846 /* -Woverlength-strings is off by default, but is enabled by -Wpedantic.
847 It is never enabled in C++, as the minimum limit is not normative
849 if (c_dialect_cxx ())
850 warn_overlength_strings
= 0;
852 /* Wmain is enabled by default in C++ but not in C. */
853 /* Wmain is disabled by default for -ffreestanding (!flag_hosted),
854 even if -Wall or -Wpedantic was given (warn_main will be 2 if set
855 by -Wall, 1 if set by -Wmain). */
857 warn_main
= (c_dialect_cxx () && flag_hosted
) ? 1 : 0;
858 else if (warn_main
== 2)
859 warn_main
= flag_hosted
? 1 : 0;
861 /* In C, -Wall and -Wc++-compat enable -Wenum-compare; if it has not
862 yet been set, it is disabled by default. In C++, it is enabled
864 if (warn_enum_compare
== -1)
865 warn_enum_compare
= c_dialect_cxx () ? 1 : 0;
867 /* -Wpacked-bitfield-compat is on by default for the C languages. The
868 warning is issued in stor-layout.c which is not part of the front-end so
869 we need to selectively turn it on here. */
870 if (warn_packed_bitfield_compat
== -1)
871 warn_packed_bitfield_compat
= 1;
873 /* Special format checking options don't work without -Wformat; warn if
877 warning (OPT_Wformat_y2k
,
878 "%<-Wformat-y2k%> ignored without %<-Wformat%>");
879 warning (OPT_Wformat_extra_args
,
880 "%<-Wformat-extra-args%> ignored without %<-Wformat%>");
881 warning (OPT_Wformat_zero_length
,
882 "%<-Wformat-zero-length%> ignored without %<-Wformat%>");
883 warning (OPT_Wformat_nonliteral
,
884 "%<-Wformat-nonliteral%> ignored without %<-Wformat%>");
885 warning (OPT_Wformat_contains_nul
,
886 "%<-Wformat-contains-nul%> ignored without %<-Wformat%>");
887 warning (OPT_Wformat_security
,
888 "%<-Wformat-security%> ignored without %<-Wformat%>");
891 /* -Wimplicit-function-declaration is enabled by default for C99. */
892 if (warn_implicit_function_declaration
== -1)
893 warn_implicit_function_declaration
= flag_isoc99
;
895 /* -Wimplicit-int is enabled by default for C99. */
896 if (warn_implicit_int
== -1)
897 warn_implicit_int
= flag_isoc99
;
899 /* -Wshift-overflow is enabled by default in C99 and C++11 modes. */
900 if (warn_shift_overflow
== -1)
901 warn_shift_overflow
= cxx_dialect
>= cxx11
|| flag_isoc99
;
903 /* -Wshift-negative-value is enabled by -Wextra in C99 and C++11 modes. */
904 if (warn_shift_negative_value
== -1)
905 warn_shift_negative_value
= (extra_warnings
906 && (cxx_dialect
>= cxx11
|| flag_isoc99
));
908 /* -Wregister is enabled by default in C++17. */
909 if (!global_options_set
.x_warn_register
)
910 warn_register
= cxx_dialect
>= cxx17
;
912 /* -Wcomma-subscript is enabled by default in C++20. */
913 if (!global_options_set
.x_warn_comma_subscript
)
914 warn_comma_subscript
= (cxx_dialect
>= cxx2a
&& warn_deprecated
);
916 /* -Wvolatile is enabled by default in C++20. */
917 if (!global_options_set
.x_warn_volatile
)
918 warn_volatile
= (cxx_dialect
>= cxx2a
&& warn_deprecated
);
920 /* Declone C++ 'structors if -Os. */
921 if (flag_declone_ctor_dtor
== -1)
922 flag_declone_ctor_dtor
= optimize_size
;
924 if (flag_abi_compat_version
== 1)
926 warning (0, "%<-fabi-compat-version=1%> is not supported, using =2");
927 flag_abi_compat_version
= 2;
930 /* Change flag_abi_version to be the actual current ABI level, for the
931 benefit of c_cpp_builtins, and to make comparison simpler. */
932 const int latest_abi_version
= 13;
933 /* Generate compatibility aliases for ABI v11 (7.1) by default. */
934 const int abi_compat_default
= 11;
936 #define clamp(X) if (X == 0 || X > latest_abi_version) X = latest_abi_version
937 clamp (flag_abi_version
);
938 clamp (warn_abi_version
);
939 clamp (flag_abi_compat_version
);
942 /* Default -Wabi= or -fabi-compat-version= from each other. */
943 if (warn_abi_version
== -1 && flag_abi_compat_version
!= -1)
944 warn_abi_version
= flag_abi_compat_version
;
945 else if (flag_abi_compat_version
== -1 && warn_abi_version
!= -1)
946 flag_abi_compat_version
= warn_abi_version
;
947 else if (warn_abi_version
== -1 && flag_abi_compat_version
== -1)
949 warn_abi_version
= latest_abi_version
;
950 if (flag_abi_version
== latest_abi_version
)
952 auto_diagnostic_group d
;
953 if (warning (OPT_Wabi
, "%<-Wabi%> won%'t warn about anything"))
955 inform (input_location
, "%<-Wabi%> warns about differences "
956 "from the most up-to-date ABI, which is also used "
958 inform (input_location
, "use e.g. %<-Wabi=11%> to warn about "
959 "changes from GCC 7");
961 flag_abi_compat_version
= abi_compat_default
;
964 flag_abi_compat_version
= latest_abi_version
;
967 /* By default, enable the new inheriting constructor semantics along with ABI
968 11. New and old should coexist fine, but it is a change in what
969 artificial symbols are generated. */
970 if (!global_options_set
.x_flag_new_inheriting_ctors
)
971 flag_new_inheriting_ctors
= abi_version_at_least (11);
973 /* For GCC 7, only enable DR150 resolution by default if -std=c++17. */
974 if (!global_options_set
.x_flag_new_ttp
)
975 flag_new_ttp
= (cxx_dialect
>= cxx17
);
977 if (cxx_dialect
>= cxx11
)
979 /* If we're allowing C++0x constructs, don't warn about C++98
980 identifiers which are keywords in C++0x. */
981 warn_cxx11_compat
= 0;
982 cpp_opts
->cpp_warn_cxx11_compat
= 0;
984 if (warn_narrowing
== -1)
987 /* Unless -f{,no-}ext-numeric-literals has been used explicitly,
988 for -std=c++{11,14,17,2a} default to -fno-ext-numeric-literals. */
989 if (flag_iso
&& !global_options_set
.x_flag_ext_numeric_literals
)
990 cpp_opts
->ext_numeric_literals
= 0;
992 else if (warn_narrowing
== -1)
995 /* C++17 has stricter evaluation order requirements; let's use some of them
996 for earlier C++ as well, so chaining works as expected. */
998 && flag_strong_eval_order
== -1)
999 flag_strong_eval_order
= (cxx_dialect
>= cxx17
? 2 : 1);
1001 /* Global sized deallocation is new in C++14. */
1002 if (flag_sized_deallocation
== -1)
1003 flag_sized_deallocation
= (cxx_dialect
>= cxx14
);
1005 /* char8_t support is new in C++2A. */
1006 if (flag_char8_t
== -1)
1007 flag_char8_t
= (cxx_dialect
>= cxx2a
);
1009 if (flag_extern_tls_init
)
1011 if (!TARGET_SUPPORTS_ALIASES
|| !SUPPORTS_WEAK
)
1013 /* Lazy TLS initialization for a variable in another TU requires
1014 alias and weak reference support. */
1015 if (flag_extern_tls_init
> 0)
1016 sorry ("external TLS initialization functions not supported "
1019 flag_extern_tls_init
= 0;
1022 flag_extern_tls_init
= 1;
1025 /* Enable by default only for C++ and C++ with ObjC extensions. */
1026 if (warn_return_type
== -1 && c_dialect_cxx ())
1027 warn_return_type
= 1;
1029 if (num_in_fnames
> 1)
1030 error ("too many filenames given; type %<%s %s%> for usage",
1031 progname
, "--help");
1033 if (flag_preprocess_only
)
1035 /* Open the output now. We must do so even if flag_no_output is
1036 on, because there may be other output than from the actual
1037 preprocessing (e.g. from -dM). */
1038 if (out_fname
[0] == '\0')
1039 out_stream
= stdout
;
1041 out_stream
= fopen (out_fname
, "w");
1043 if (out_stream
== NULL
)
1045 fatal_error (input_location
, "opening output file %s: %m", out_fname
);
1049 init_pp_output (out_stream
);
1055 /* When writing a PCH file, avoid reading some other PCH file,
1056 because the default address space slot then can't be used
1057 for the output PCH file. */
1060 c_common_no_more_pch ();
1061 /* Only -g0 and -gdwarf* are supported with PCH, for other
1062 debug formats we warn here and refuse to load any PCH files. */
1063 if (write_symbols
!= NO_DEBUG
&& write_symbols
!= DWARF2_DEBUG
)
1064 warning (OPT_Wdeprecated
,
1065 "the %qs debug format cannot be used with "
1066 "pre-compiled headers", debug_type_names
[write_symbols
]);
1068 else if (write_symbols
!= NO_DEBUG
&& write_symbols
!= DWARF2_DEBUG
)
1069 c_common_no_more_pch ();
1071 /* Yuk. WTF is this? I do know ObjC relies on it somewhere. */
1072 input_location
= UNKNOWN_LOCATION
;
1075 cb
= cpp_get_callbacks (parse_in
);
1076 cb
->file_change
= cb_file_change
;
1077 cb
->dir_change
= cb_dir_change
;
1078 cpp_post_options (parse_in
);
1079 init_global_opts_from_cpp (&global_options
, cpp_get_options (parse_in
));
1081 input_location
= UNKNOWN_LOCATION
;
1083 *pfilename
= this_input_filename
1084 = cpp_read_main_file (parse_in
, in_fnames
[0]);
1085 /* Don't do any compilation or preprocessing if there is no input file. */
1086 if (this_input_filename
== NULL
)
1092 if (flag_working_directory
1093 && flag_preprocess_only
&& !flag_no_line_commands
)
1094 pp_dir_change (parse_in
, get_src_pwd ());
1096 /* Disable LTO output when outputting a precompiled header. */
1097 if (pch_file
&& flag_lto
)
1100 flag_generate_lto
= 0;
1103 return flag_preprocess_only
;
1106 /* Front end initialization common to C, ObjC and C++. */
1108 c_common_init (void)
1110 /* Set up preprocessor arithmetic. Must be done after call to
1111 c_common_nodes_and_builtins for type nodes to be good. */
1112 cpp_opts
->precision
= TYPE_PRECISION (intmax_type_node
);
1113 cpp_opts
->char_precision
= TYPE_PRECISION (char_type_node
);
1114 cpp_opts
->int_precision
= TYPE_PRECISION (integer_type_node
);
1115 cpp_opts
->wchar_precision
= TYPE_PRECISION (wchar_type_node
);
1116 cpp_opts
->unsigned_wchar
= TYPE_UNSIGNED (wchar_type_node
);
1117 cpp_opts
->bytes_big_endian
= BYTES_BIG_ENDIAN
;
1119 /* This can't happen until after wchar_precision and bytes_big_endian
1121 cpp_init_iconv (parse_in
);
1126 fputs ("Compiler executable checksum: ", stderr
);
1127 for (i
= 0; i
< 16; i
++)
1128 fprintf (stderr
, "%02x", executable_checksum
[i
]);
1129 putc ('\n', stderr
);
1132 /* Has to wait until now so that cpplib has its hash table. */
1135 if (flag_preprocess_only
)
1137 c_finish_options ();
1138 preprocess_file (parse_in
);
1145 /* Initialize the integrated preprocessor after debug output has been
1146 initialized; loop over each input file. */
1148 c_common_parse_file (void)
1155 c_finish_options ();
1156 /* Open the dump file to use for the original dump output
1157 here, to be used during parsing for the current file. */
1158 original_dump_file
= dump_begin (TDI_original
, &original_dump_flags
);
1163 /* And end the main input file, if the debug writer wants it */
1164 if (debug_hooks
->start_end_main_source_file
)
1165 (*debug_hooks
->end_source_file
) (0);
1166 if (++i
>= num_in_fnames
)
1168 cpp_undef_all (parse_in
);
1169 cpp_clear_file_cache (parse_in
);
1171 = cpp_read_main_file (parse_in
, in_fnames
[i
]);
1172 if (original_dump_file
)
1174 dump_end (TDI_original
, original_dump_file
);
1175 original_dump_file
= NULL
;
1177 /* If an input file is missing, abandon further compilation.
1178 cpplib has issued a diagnostic. */
1179 if (!this_input_filename
)
1183 c_parse_final_cleanups ();
1186 /* Returns the appropriate dump file for PHASE to dump with FLAGS. */
1189 get_dump_info (int phase
, dump_flags_t
*flags
)
1191 gcc_assert (phase
== TDI_original
);
1193 *flags
= original_dump_flags
;
1194 return original_dump_file
;
1197 /* Common finish hook for the C, ObjC and C++ front ends. */
1199 c_common_finish (void)
1201 FILE *deps_stream
= NULL
;
1203 /* Note that we write the dependencies even if there are errors. This is
1204 useful for handling outdated generated headers that now trigger errors
1205 (for example, with #error) which would be resolved by re-generating
1206 them. In a sense, this complements -MG. */
1207 if (cpp_opts
->deps
.style
!= DEPS_NONE
)
1209 /* If -M or -MM was seen without -MF, default output to the
1212 deps_stream
= out_stream
;
1213 else if (deps_file
[0] == '-' && deps_file
[1] == '\0')
1214 deps_stream
= stdout
;
1217 deps_stream
= fopen (deps_file
, deps_append
? "a": "w");
1219 fatal_error (input_location
, "opening dependency file %s: %m",
1224 /* For performance, avoid tearing down cpplib's internal structures
1225 with cpp_destroy (). */
1226 cpp_finish (parse_in
, deps_stream
);
1228 if (deps_stream
&& deps_stream
!= out_stream
&& deps_stream
!= stdout
1229 && (ferror (deps_stream
) || fclose (deps_stream
)))
1230 fatal_error (input_location
, "closing dependency file %s: %m", deps_file
);
1232 if (out_stream
&& (ferror (out_stream
) || fclose (out_stream
)))
1233 fatal_error (input_location
, "when writing output to %s: %m", out_fname
);
1236 /* Either of two environment variables can specify output of
1237 dependencies. Their value is either "OUTPUT_FILE" or "OUTPUT_FILE
1238 DEPS_TARGET", where OUTPUT_FILE is the file to write deps info to
1239 and DEPS_TARGET is the target to mention in the deps. They also
1240 result in dependency information being appended to the output file
1241 rather than overwriting it, and like Sun's compiler
1242 SUNPRO_DEPENDENCIES suppresses the dependency on the main file. */
1244 check_deps_environment_vars (void)
1248 spec
= getenv ("DEPENDENCIES_OUTPUT");
1250 cpp_opts
->deps
.style
= DEPS_USER
;
1253 spec
= getenv ("SUNPRO_DEPENDENCIES");
1256 cpp_opts
->deps
.style
= DEPS_SYSTEM
;
1257 cpp_opts
->deps
.ignore_main_file
= true;
1263 /* Find the space before the DEPS_TARGET, if there is one. */
1264 char *s
= strchr (spec
, ' ');
1267 /* Let the caller perform MAKE quoting. */
1268 defer_opt (OPT_MT
, s
+ 1);
1272 /* Command line -MF overrides environment variables and default. */
1281 /* Handle deferred command line switches. */
1283 handle_deferred_opts (void)
1285 /* Avoid allocating the deps buffer if we don't need it.
1286 (This flag may be true without there having been -MT or -MQ
1287 options, but we'll still need the deps buffer.) */
1291 mkdeps
*deps
= cpp_get_deps (parse_in
);
1293 for (size_t i
= 0; i
< deferred_count
; i
++)
1295 struct deferred_opt
*opt
= &deferred_opts
[i
];
1297 if (opt
->code
== OPT_MT
|| opt
->code
== OPT_MQ
)
1298 deps_add_target (deps
, opt
->arg
, opt
->code
== OPT_MQ
);
1302 /* These settings are appropriate for GCC, but not necessarily so for
1303 cpplib as a library. */
1305 sanitize_cpp_opts (void)
1307 /* If we don't know what style of dependencies to output, complain
1308 if any other dependency switches have been given. */
1309 if (deps_seen
&& cpp_opts
->deps
.style
== DEPS_NONE
)
1310 error ("to generate dependencies you must specify either %<-M%> "
1313 /* -dM and dependencies suppress normal output; do it here so that
1314 the last -d[MDN] switch overrides earlier ones. */
1315 if (flag_dump_macros
== 'M')
1318 /* By default, -fdirectives-only implies -dD. This allows subsequent phases
1319 to perform proper macro expansion. */
1320 if (cpp_opts
->directives_only
&& !cpp_opts
->preprocessed
&& !flag_dump_macros
)
1321 flag_dump_macros
= 'D';
1323 /* Disable -dD, -dN and -dI if normal output is suppressed. Allow
1324 -dM since at least glibc relies on -M -dM to work. */
1325 /* Also, flag_no_output implies flag_no_line_commands, always. */
1328 if (flag_dump_macros
!= 'M')
1329 flag_dump_macros
= 0;
1330 flag_dump_includes
= 0;
1331 flag_no_line_commands
= 1;
1333 else if (cpp_opts
->deps
.missing_files
)
1334 error ("%<-MG%> may only be used with %<-M%> or %<-MM%>");
1336 cpp_opts
->unsigned_char
= !flag_signed_char
;
1337 cpp_opts
->stdc_0_in_system_headers
= STDC_0_IN_SYSTEM_HEADERS
;
1339 /* Wlong-long is disabled by default. It is enabled by:
1340 [-Wpedantic | -Wtraditional] -std=[gnu|c]++98 ; or
1341 [-Wpedantic | -Wtraditional] -std=non-c99
1343 Either -Wlong-long or -Wno-long-long override any other settings.
1344 ??? These conditions should be handled in c.opt. */
1345 if (warn_long_long
== -1)
1347 warn_long_long
= ((pedantic
|| warn_traditional
)
1348 && (c_dialect_cxx () ? cxx_dialect
== cxx98
: !flag_isoc99
));
1349 cpp_opts
->cpp_warn_long_long
= warn_long_long
;
1352 /* If we're generating preprocessor output, emit current directory
1353 if explicitly requested or if debugging information is enabled.
1354 ??? Maybe we should only do it for debugging formats that
1355 actually output the current directory? */
1356 if (flag_working_directory
== -1)
1357 flag_working_directory
= (debug_info_level
!= DINFO_LEVEL_NONE
);
1359 if (warn_implicit_fallthrough
< 5)
1360 cpp_opts
->cpp_warn_implicit_fallthrough
= warn_implicit_fallthrough
;
1362 cpp_opts
->cpp_warn_implicit_fallthrough
= 0;
1364 if (cpp_opts
->directives_only
)
1366 if (cpp_warn_unused_macros
)
1367 error ("%<-fdirectives-only%> is incompatible "
1368 "with %<-Wunused-macros%>");
1369 if (cpp_opts
->traditional
)
1370 error ("%<-fdirectives-only%> is incompatible with %<-traditional%>");
1374 /* Add include path with a prefix at the front of its name. */
1376 add_prefixed_path (const char *suffix
, incpath_kind chain
)
1380 size_t prefix_len
, suffix_len
;
1382 suffix_len
= strlen (suffix
);
1383 prefix
= iprefix
? iprefix
: cpp_GCC_INCLUDE_DIR
;
1384 prefix_len
= iprefix
? strlen (iprefix
) : cpp_GCC_INCLUDE_DIR_len
;
1386 path
= (char *) xmalloc (prefix_len
+ suffix_len
+ 1);
1387 memcpy (path
, prefix
, prefix_len
);
1388 memcpy (path
+ prefix_len
, suffix
, suffix_len
);
1389 path
[prefix_len
+ suffix_len
] = '\0';
1391 add_path (path
, chain
, 0, false);
1394 /* Handle -D, -U, -A, -imacros, and the first -include. */
1396 c_finish_options (void)
1398 if (!cpp_opts
->preprocessed
)
1400 const line_map_ordinary
*bltin_map
1401 = linemap_check_ordinary (linemap_add (line_table
, LC_RENAME
, 0,
1402 _("<built-in>"), 0));
1403 cb_file_change (parse_in
, bltin_map
);
1405 /* Make sure all of the builtins about to be declared have
1406 BUILTINS_LOCATION has their location_t. */
1407 cpp_force_token_locations (parse_in
, BUILTINS_LOCATION
);
1409 cpp_init_builtins (parse_in
, flag_hosted
);
1410 c_cpp_builtins (parse_in
);
1412 /* We're about to send user input to cpplib, so make it warn for
1413 things that we previously (when we sent it internal definitions)
1414 told it to not warn.
1416 C99 permits implementation-defined characters in identifiers.
1417 The documented meaning of -std= is to turn off extensions that
1418 conflict with the specified standard, and since a strictly
1419 conforming program cannot contain a '$', we do not condition
1420 their acceptance on the -std= setting. */
1421 cpp_opts
->warn_dollars
= (cpp_opts
->cpp_pedantic
&& !cpp_opts
->c99
);
1423 const line_map_ordinary
*cmd_map
1424 = linemap_check_ordinary (linemap_add (line_table
, LC_RENAME
, 0,
1425 _("<command-line>"), 0));
1426 cb_file_change (parse_in
, cmd_map
);
1428 /* All command line defines must have the same location. */
1429 cpp_force_token_locations (parse_in
, cmd_map
->start_location
);
1430 for (size_t i
= 0; i
< deferred_count
; i
++)
1432 struct deferred_opt
*opt
= &deferred_opts
[i
];
1434 if (opt
->code
== OPT_D
)
1435 cpp_define (parse_in
, opt
->arg
);
1436 else if (opt
->code
== OPT_U
)
1437 cpp_undef (parse_in
, opt
->arg
);
1438 else if (opt
->code
== OPT_A
)
1440 if (opt
->arg
[0] == '-')
1441 cpp_unassert (parse_in
, opt
->arg
+ 1);
1443 cpp_assert (parse_in
, opt
->arg
);
1447 cpp_stop_forcing_token_locations (parse_in
);
1449 else if (cpp_opts
->directives_only
)
1450 cpp_init_special_builtins (parse_in
);
1452 /* Start the main input file, if the debug writer wants it. */
1453 if (debug_hooks
->start_end_main_source_file
1454 && !flag_preprocess_only
)
1455 (*debug_hooks
->start_source_file
) (0, this_input_filename
);
1457 if (!cpp_opts
->preprocessed
)
1458 /* Handle -imacros after -D and -U. */
1459 for (size_t i
= 0; i
< deferred_count
; i
++)
1461 struct deferred_opt
*opt
= &deferred_opts
[i
];
1463 if (opt
->code
== OPT_imacros
1464 && cpp_push_include (parse_in
, opt
->arg
))
1466 /* Disable push_command_line_include callback for now. */
1467 include_cursor
= deferred_count
+ 1;
1468 cpp_scan_nooutput (parse_in
);
1473 push_command_line_include ();
1476 /* Give CPP the next file given by -include, if any. */
1478 push_command_line_include (void)
1480 /* This can happen if disabled by -imacros for example.
1481 Punt so that we don't set "<command-line>" as the filename for
1483 if (include_cursor
> deferred_count
)
1486 if (!done_preinclude
)
1488 done_preinclude
= true;
1489 if (flag_hosted
&& std_inc
&& !cpp_opts
->preprocessed
)
1491 const char *preinc
= targetcm
.c_preinclude ();
1492 if (preinc
&& cpp_push_default_include (parse_in
, preinc
))
1497 pch_cpp_save_state ();
1499 while (include_cursor
< deferred_count
)
1501 struct deferred_opt
*opt
= &deferred_opts
[include_cursor
++];
1503 if (!cpp_opts
->preprocessed
&& opt
->code
== OPT_include
1504 && cpp_push_include (parse_in
, opt
->arg
))
1508 if (include_cursor
== deferred_count
)
1511 /* -Wunused-macros should only warn about macros defined hereafter. */
1512 cpp_opts
->warn_unused_macros
= cpp_warn_unused_macros
;
1513 /* Restore the line map back to the main file. */
1514 if (!cpp_opts
->preprocessed
)
1515 cpp_change_file (parse_in
, LC_RENAME
, this_input_filename
);
1517 /* Set this here so the client can change the option if it wishes,
1518 and after stacking the main file so we don't trace the main file. */
1519 line_table
->trace_includes
= cpp_opts
->print_include_names
;
1523 /* File change callback. Has to handle -include files. */
1525 cb_file_change (cpp_reader
* ARG_UNUSED (pfile
),
1526 const line_map_ordinary
*new_map
)
1528 if (flag_preprocess_only
)
1529 pp_file_change (new_map
);
1531 fe_file_change (new_map
);
1534 && (new_map
->reason
== LC_ENTER
|| new_map
->reason
== LC_RENAME
))
1536 /* Signal to plugins that a file is included. This could happen
1537 several times with the same file path, e.g. because of
1538 several '#include' or '#line' directives... */
1539 invoke_plugin_callbacks
1540 (PLUGIN_INCLUDE_FILE
,
1541 const_cast<char*> (ORDINARY_MAP_FILE_NAME (new_map
)));
1544 if (new_map
== 0 || (new_map
->reason
== LC_LEAVE
&& MAIN_FILE_P (new_map
)))
1546 pch_cpp_save_state ();
1547 push_command_line_include ();
1552 cb_dir_change (cpp_reader
* ARG_UNUSED (pfile
), const char *dir
)
1554 if (!set_src_pwd (dir
))
1555 warning (0, "too late for # directive to set debug directory");
1558 /* Set the C 89 standard (with 1994 amendments if C94, without GNU
1559 extensions if ISO). There is no concept of gnu94. */
1561 set_std_c89 (int c94
, int iso
)
1563 cpp_set_lang (parse_in
, c94
? CLK_STDC94
: iso
? CLK_STDC89
: CLK_GNUC89
);
1566 flag_no_gnu_keywords
= iso
;
1567 flag_no_nonansi_builtin
= iso
;
1572 lang_hooks
.name
= "GNU C89";
1575 /* Set the C 99 standard (without GNU extensions if ISO). */
1577 set_std_c99 (int iso
)
1579 cpp_set_lang (parse_in
, iso
? CLK_STDC99
: CLK_GNUC99
);
1581 flag_no_nonansi_builtin
= iso
;
1587 lang_hooks
.name
= "GNU C99";
1590 /* Set the C 11 standard (without GNU extensions if ISO). */
1592 set_std_c11 (int iso
)
1594 cpp_set_lang (parse_in
, iso
? CLK_STDC11
: CLK_GNUC11
);
1596 flag_no_nonansi_builtin
= iso
;
1602 lang_hooks
.name
= "GNU C11";
1605 /* Set the C 17 standard (without GNU extensions if ISO). */
1607 set_std_c17 (int iso
)
1609 cpp_set_lang (parse_in
, iso
? CLK_STDC17
: CLK_GNUC17
);
1611 flag_no_nonansi_builtin
= iso
;
1617 lang_hooks
.name
= "GNU C17";
1620 /* Set the C 2X standard (without GNU extensions if ISO). */
1622 set_std_c2x (int iso
)
1624 cpp_set_lang (parse_in
, iso
? CLK_STDC2X
: CLK_GNUC2X
);
1626 flag_no_nonansi_builtin
= iso
;
1632 lang_hooks
.name
= "GNU C2X";
1636 /* Set the C++ 98 standard (without GNU extensions if ISO). */
1638 set_std_cxx98 (int iso
)
1640 cpp_set_lang (parse_in
, iso
? CLK_CXX98
: CLK_GNUCXX
);
1641 flag_no_gnu_keywords
= iso
;
1642 flag_no_nonansi_builtin
= iso
;
1646 cxx_dialect
= cxx98
;
1647 lang_hooks
.name
= "GNU C++98";
1650 /* Set the C++ 2011 standard (without GNU extensions if ISO). */
1652 set_std_cxx11 (int iso
)
1654 cpp_set_lang (parse_in
, iso
? CLK_CXX11
: CLK_GNUCXX11
);
1655 flag_no_gnu_keywords
= iso
;
1656 flag_no_nonansi_builtin
= iso
;
1658 /* C++11 includes the C99 standard library. */
1661 cxx_dialect
= cxx11
;
1662 lang_hooks
.name
= "GNU C++11";
1665 /* Set the C++ 2014 standard (without GNU extensions if ISO). */
1667 set_std_cxx14 (int iso
)
1669 cpp_set_lang (parse_in
, iso
? CLK_CXX14
: CLK_GNUCXX14
);
1670 flag_no_gnu_keywords
= iso
;
1671 flag_no_nonansi_builtin
= iso
;
1673 /* C++14 includes the C99 standard library. */
1676 cxx_dialect
= cxx14
;
1677 lang_hooks
.name
= "GNU C++14";
1680 /* Set the C++ 2017 standard (without GNU extensions if ISO). */
1682 set_std_cxx17 (int iso
)
1684 cpp_set_lang (parse_in
, iso
? CLK_CXX17
: CLK_GNUCXX17
);
1685 flag_no_gnu_keywords
= iso
;
1686 flag_no_nonansi_builtin
= iso
;
1688 /* C++17 includes the C11 standard library. */
1692 cxx_dialect
= cxx17
;
1693 lang_hooks
.name
= "GNU C++17";
1696 /* Set the C++ 202a draft standard (without GNU extensions if ISO). */
1698 set_std_cxx2a (int iso
)
1700 cpp_set_lang (parse_in
, iso
? CLK_CXX2A
: CLK_GNUCXX2A
);
1701 flag_no_gnu_keywords
= iso
;
1702 flag_no_nonansi_builtin
= iso
;
1704 /* C++17 includes the C11 standard library. */
1708 cxx_dialect
= cxx2a
;
1709 lang_hooks
.name
= "GNU C++17"; /* Pretend C++17 until standardization. */
1712 /* Args to -d specify what to dump. Silently ignore
1713 unrecognized options; they may be aimed at toplev.c. */
1715 handle_OPT_d (const char *arg
)
1719 while ((c
= *arg
++) != '\0')
1722 case 'M': /* Dump macros only. */
1723 case 'N': /* Dump names. */
1724 case 'D': /* Dump definitions. */
1725 case 'U': /* Dump used macros. */
1726 flag_dump_macros
= c
;
1730 flag_dump_includes
= 1;