1 /* C/ObjC/C++ command line option handling.
2 Copyright (C) 2002-2022 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_cxx20 (int);
116 static void set_std_cxx23 (int);
117 static void set_std_c89 (int, int);
118 static void set_std_c99 (int);
119 static void set_std_c11 (int);
120 static void set_std_c17 (int);
121 static void set_std_c2x (int);
122 static void check_deps_environment_vars (void);
123 static void handle_deferred_opts (void);
124 static void sanitize_cpp_opts (void);
125 static void add_prefixed_path (const char *, incpath_kind
);
126 static void push_command_line_include (void);
127 static void cb_file_change (cpp_reader
*, const line_map_ordinary
*);
128 static void cb_dir_change (cpp_reader
*, const char *);
129 static void c_finish_options (void);
131 #ifndef STDC_0_IN_SYSTEM_HEADERS
132 #define STDC_0_IN_SYSTEM_HEADERS 0
135 /* Holds switches parsed by c_common_handle_option (), but whose
136 handling is deferred to c_common_post_options (). */
137 static void defer_opt (enum opt_code
, const char *);
138 static struct deferred_opt
145 extern const unsigned int
146 c_family_lang_mask
= (CL_C
| CL_CXX
| CL_ObjC
| CL_ObjCXX
);
148 /* Defer option CODE with argument ARG. */
150 defer_opt (enum opt_code code
, const char *arg
)
152 deferred_opts
[deferred_count
].code
= code
;
153 deferred_opts
[deferred_count
].arg
= arg
;
157 /* Return language mask for option parsing. */
159 c_common_option_lang_mask (void)
161 static const unsigned int lang_flags
[] = {CL_C
, CL_ObjC
, CL_CXX
, CL_ObjCXX
};
163 return lang_flags
[c_language
];
166 /* Diagnostic finalizer for C/C++/Objective-C/Objective-C++. */
168 c_diagnostic_finalizer (diagnostic_context
*context
,
169 diagnostic_info
*diagnostic
,
172 char *saved_prefix
= pp_take_prefix (context
->printer
);
173 pp_set_prefix (context
->printer
, NULL
);
174 pp_newline (context
->printer
);
175 diagnostic_show_locus (context
, diagnostic
->richloc
, diagnostic
->kind
);
176 /* By default print macro expansion contexts in the diagnostic
177 finalizer -- for tokens resulting from macro expansion. */
178 virt_loc_aware_diagnostic_finalizer (context
, diagnostic
);
179 pp_set_prefix (context
->printer
, saved_prefix
);
180 pp_flush (context
->printer
);
183 /* Common default settings for diagnostics. */
185 c_common_diagnostics_set_defaults (diagnostic_context
*context
)
187 diagnostic_finalizer (context
) = c_diagnostic_finalizer
;
188 context
->opt_permissive
= OPT_fpermissive
;
191 /* Input charset configuration for diagnostics. */
193 c_common_input_charset_cb (const char * /*filename*/)
195 const char *cs
= cpp_opts
->input_charset
;
196 return cpp_input_conversion_is_trivial (cs
) ? nullptr : cs
;
199 /* Whether options from all C-family languages should be accepted
201 static bool accept_all_c_family_options
= false;
203 /* Return whether to complain about a wrong-language option. */
205 c_common_complain_wrong_lang_p (const struct cl_option
*option
)
207 if (accept_all_c_family_options
208 && (option
->flags
& c_family_lang_mask
))
214 /* Initialize options structure OPTS. */
216 c_common_init_options_struct (struct gcc_options
*opts
)
218 opts
->x_flag_exceptions
= c_dialect_cxx ();
219 opts
->x_warn_pointer_arith
= c_dialect_cxx ();
220 opts
->x_warn_write_strings
= c_dialect_cxx ();
221 opts
->x_flag_warn_unused_result
= true;
223 /* By default, C99-like requirements for complex multiply and divide. */
224 opts
->x_flag_complex_method
= 2;
225 opts
->x_flag_default_complex_method
= opts
->x_flag_complex_method
;
228 /* Common initialization before calling option handlers. */
230 c_common_init_options (unsigned int decoded_options_count
,
231 struct cl_decoded_option
*decoded_options
)
234 struct cpp_callbacks
*cb
;
237 = new (ggc_alloc
<string_concat_db
> ()) string_concat_db ();
239 parse_in
= cpp_create_reader (c_dialect_cxx () ? CLK_GNUCXX
: CLK_GNUC89
,
240 ident_hash
, line_table
);
241 cb
= cpp_get_callbacks (parse_in
);
242 cb
->diagnostic
= c_cpp_diagnostic
;
244 cpp_opts
= cpp_get_options (parse_in
);
245 cpp_opts
->dollars_in_ident
= DOLLARS_IN_IDENTIFIERS
;
246 cpp_opts
->objc
= c_dialect_objc ();
247 cpp_opts
->deps
.modules
= true;
249 /* Reset to avoid warnings on internal definitions. We set it just
250 before passing on command-line options to cpplib. */
251 cpp_opts
->warn_dollars
= 0;
253 deferred_opts
= XNEWVEC (struct deferred_opt
, decoded_options_count
);
255 if (c_language
== clk_c
)
257 /* The default for C is gnu17. */
258 set_std_c17 (false /* ISO */);
260 /* If preprocessing assembly language, accept any of the C-family
261 front end options since the driver may pass them through. */
262 for (i
= 1; i
< decoded_options_count
; i
++)
263 if (decoded_options
[i
].opt_index
== OPT_lang_asm
)
265 accept_all_c_family_options
= true;
270 /* Set C++ standard to C++17 if not specified on the command line. */
271 if (c_dialect_cxx ())
272 set_std_cxx17 (/*ISO*/false);
274 global_dc
->colorize_source_p
= true;
277 /* Handle switch SCODE with argument ARG. VALUE is true, unless no-
278 form of an -f or -W option was given. Returns false if the switch was
279 invalid, true if valid. Use HANDLERS in recursive handle_option calls. */
281 c_common_handle_option (size_t scode
, const char *arg
, HOST_WIDE_INT value
,
282 int kind
, location_t loc
,
283 const struct cl_option_handlers
*handlers
)
285 const struct cl_option
*option
= &cl_options
[scode
];
286 enum opt_code code
= (enum opt_code
) scode
;
289 /* Prevent resetting the language standard to a C dialect when the driver
290 has already determined that we're looking at assembler input. */
291 bool preprocessing_asm_p
= (cpp_get_options (parse_in
)->lang
== CLK_ASM
);
296 if (cl_options
[code
].flags
& c_family_lang_mask
)
298 if ((option
->flags
& CL_TARGET
)
299 && ! targetcm
.handle_c_option (scode
, arg
, value
))
306 case OPT__output_pch_
:
311 defer_opt (code
, arg
);
315 cpp_opts
->discard_comments
= 0;
319 cpp_opts
->discard_comments
= 0;
320 cpp_opts
->discard_comments_in_macro_exp
= 0;
324 defer_opt (code
, arg
);
328 cpp_opts
->print_include_names
= 1;
332 TARGET_OPTF (xstrdup (arg
));
336 if (strcmp (arg
, "-"))
337 add_path (xstrdup (arg
), INC_BRACKET
, 0, true);
340 if (quote_chain_split
)
341 error ("%<-I-%> specified twice");
342 quote_chain_split
= true;
343 split_quote_chain ();
344 inform (input_location
, "obsolete option %<-I-%> used, "
345 "please use %<-iquote%> instead");
351 /* When doing dependencies with -M or -MM, suppress normal
352 preprocessed output, but still do -dM etc. as software
353 depends on this. Preprocessed output does occur if -MD, -MMD
354 or environment var dependency generation is used. */
355 cpp_opts
->deps
.style
= (code
== OPT_M
? DEPS_SYSTEM
: DEPS_USER
);
361 cpp_opts
->deps
.style
= (code
== OPT_MD
? DEPS_SYSTEM
: DEPS_USER
);
362 cpp_opts
->deps
.need_preprocessor_output
= true;
373 cpp_opts
->deps
.missing_files
= true;
378 cpp_opts
->deps
.phony_targets
= true;
382 /* Do not set deps_seen, so the user can unconditionally turn
384 cpp_opts
->deps
.modules
= true;
387 case OPT_Mno_modules
:
388 /* Do not set deps_seen, so the user can unconditionally turn
390 cpp_opts
->deps
.modules
= false;
396 defer_opt (code
, arg
);
400 flag_no_line_commands
= 1;
404 defer_opt (code
, arg
);
408 /* ??? Don't add new options here. Use LangEnabledBy in c.opt. */
410 cpp_opts
->warn_num_sign_change
= value
;
413 case OPT_Wunknown_pragmas
:
414 /* Set to greater than 1, so that even unknown pragmas in
415 system headers will be warned about. */
416 /* ??? There is no way to handle this automatically for now. */
417 warn_unknown_pragmas
= value
* 2;
421 if (!c_dialect_cxx ())
422 set_std_c89 (false, true);
424 set_std_cxx98 (true);
435 warning (0, "%<-Wabi=1%> is not supported, using =2");
438 warn_abi_version
= value
;
441 case OPT_fcanonical_system_headers
:
442 cpp_opts
->canonical_system_headers
= value
;
445 case OPT_fcond_mismatch
:
446 if (!c_dialect_cxx ())
448 flag_cond_mismatch
= value
;
451 warning (0, "switch %qs is no longer supported", option
->opt_text
);
458 disable_builtin_function (arg
);
461 case OPT_fdirectives_only
:
462 cpp_opts
->directives_only
= value
;
465 case OPT_fdollars_in_identifiers
:
466 cpp_opts
->dollars_in_ident
= value
;
469 case OPT_fmacro_prefix_map_
:
470 add_macro_prefix_map (arg
);
473 case OPT_ffreestanding
:
478 flag_no_builtin
= !value
;
481 case OPT_fconstant_string_class_
:
482 constant_string_class_name
= arg
;
485 case OPT_fextended_identifiers
:
486 cpp_opts
->extended_identifiers
= value
;
489 case OPT_fmax_include_depth_
:
490 cpp_opts
->max_include_depth
= value
;
493 case OPT_foperator_names
:
494 cpp_opts
->operator_names
= value
;
498 cpp_opts
->restore_pch_deps
= value
;
501 case OPT_fpch_preprocess
:
502 flag_pch_preprocess
= value
;
505 case OPT_fpermissive
:
506 flag_permissive
= value
;
507 global_dc
->permissive
= value
;
510 case OPT_fpreprocessed
:
511 cpp_opts
->preprocessed
= value
;
518 case OPT_ftrack_macro_expansion
:
523 case OPT_ftrack_macro_expansion_
:
524 if (arg
&& *arg
!= '\0')
525 cpp_opts
->track_macro_expansion
= value
;
527 cpp_opts
->track_macro_expansion
= 2;
530 case OPT_fexec_charset_
:
531 cpp_opts
->narrow_charset
= arg
;
534 case OPT_fwide_exec_charset_
:
535 cpp_opts
->wide_charset
= arg
;
538 case OPT_finput_charset_
:
539 cpp_opts
->input_charset
= arg
;
542 case OPT_ftemplate_depth_
:
543 max_tinst_depth
= value
;
546 case OPT_fvisibility_inlines_hidden
:
547 visibility_options
.inlines_hidden
= value
;
550 case OPT_femit_struct_debug_baseonly
:
551 set_struct_debug_option (&global_options
, loc
, "base");
554 case OPT_femit_struct_debug_reduced
:
555 set_struct_debug_option (&global_options
, loc
,
556 "dir:ord:sys,dir:gen:any,ind:base");
559 case OPT_femit_struct_debug_detailed_
:
560 set_struct_debug_option (&global_options
, loc
, arg
);
563 case OPT_fext_numeric_literals
:
564 cpp_opts
->ext_numeric_literals
= value
;
568 add_path (xstrdup (arg
), INC_AFTER
, 0, true);
573 defer_opt (code
, arg
);
585 add_path (xstrdup (arg
), INC_QUOTE
, 0, true);
593 add_path (xstrdup (arg
), INC_SYSTEM
, 0, true);
596 case OPT_iwithprefix
:
597 add_prefixed_path (arg
, INC_SYSTEM
);
600 case OPT_iwithprefixbefore
:
601 add_prefixed_path (arg
, INC_BRACKET
);
605 cpp_set_lang (parse_in
, CLK_ASM
);
606 cpp_opts
->dollars_in_ident
= false;
621 error ("output filename specified twice");
624 case OPT_print_objc_runtime_info
:
625 print_struct_values
= 1;
633 case OPT_std_gnu__98
:
634 if (!preprocessing_asm_p
)
635 set_std_cxx98 (code
== OPT_std_c__98
/* ISO */);
639 case OPT_std_gnu__11
:
640 if (!preprocessing_asm_p
)
641 set_std_cxx11 (code
== OPT_std_c__11
/* ISO */);
645 case OPT_std_gnu__14
:
646 if (!preprocessing_asm_p
)
647 set_std_cxx14 (code
== OPT_std_c__14
/* ISO */);
651 case OPT_std_gnu__17
:
652 if (!preprocessing_asm_p
)
653 set_std_cxx17 (code
== OPT_std_c__17
/* ISO */);
657 case OPT_std_gnu__20
:
658 if (!preprocessing_asm_p
)
659 set_std_cxx20 (code
== OPT_std_c__20
/* ISO */);
663 case OPT_std_gnu__23
:
664 if (!preprocessing_asm_p
)
665 set_std_cxx23 (code
== OPT_std_c__23
/* ISO */);
669 case OPT_std_iso9899_199409
:
670 if (!preprocessing_asm_p
)
671 set_std_c89 (code
== OPT_std_iso9899_199409
/* c94 */, true /* ISO */);
675 if (!preprocessing_asm_p
)
676 set_std_c89 (false /* c94 */, false /* ISO */);
680 if (!preprocessing_asm_p
)
681 set_std_c99 (true /* ISO */);
685 if (!preprocessing_asm_p
)
686 set_std_c99 (false /* ISO */);
690 if (!preprocessing_asm_p
)
691 set_std_c11 (true /* ISO */);
695 if (!preprocessing_asm_p
)
696 set_std_c11 (false /* ISO */);
700 if (!preprocessing_asm_p
)
701 set_std_c17 (true /* ISO */);
705 if (!preprocessing_asm_p
)
706 set_std_c17 (false /* ISO */);
710 if (!preprocessing_asm_p
)
711 set_std_c2x (true /* ISO */);
715 if (!preprocessing_asm_p
)
716 set_std_c2x (false /* ISO */);
720 cpp_opts
->trigraphs
= 1;
723 case OPT_traditional_cpp
:
724 cpp_opts
->traditional
= 1;
735 C_handle_option_auto (&global_options
, &global_options_set
,
737 c_family_lang_mask
, kind
,
738 loc
, handlers
, global_dc
);
742 ObjC_handle_option_auto (&global_options
, &global_options_set
,
744 c_family_lang_mask
, kind
,
745 loc
, handlers
, global_dc
);
749 CXX_handle_option_auto (&global_options
, &global_options_set
,
751 c_family_lang_mask
, kind
,
752 loc
, handlers
, global_dc
);
756 ObjCXX_handle_option_auto (&global_options
, &global_options_set
,
758 c_family_lang_mask
, kind
,
759 loc
, handlers
, global_dc
);
766 cpp_handle_option_auto (&global_options
, scode
, cpp_opts
);
770 /* Default implementation of TARGET_HANDLE_C_OPTION. */
773 default_handle_c_option (size_t code ATTRIBUTE_UNUSED
,
774 const char *arg ATTRIBUTE_UNUSED
,
775 int value ATTRIBUTE_UNUSED
)
780 /* Post-switch processing. */
782 c_common_post_options (const char **pfilename
)
784 /* Canonicalize the input and output filenames. */
785 if (in_fnames
== NULL
)
787 in_fnames
= XNEWVEC (const char *, 1);
790 else if (strcmp (in_fnames
[0], "-") == 0)
793 error ("cannot use %<-%> as input filename for a precompiled header");
798 if (out_fname
== NULL
|| !strcmp (out_fname
, "-"))
801 if (cpp_opts
->deps
.style
== DEPS_NONE
)
802 check_deps_environment_vars ();
804 handle_deferred_opts ();
806 sanitize_cpp_opts ();
808 register_include_chains (parse_in
, sysroot
, iprefix
, imultilib
,
809 std_inc
, std_cxx_inc
&& c_dialect_cxx (), verbose
);
811 #ifdef C_COMMON_OVERRIDE_OPTIONS
812 /* Some machines may reject certain combinations of C
813 language-specific options. */
814 C_COMMON_OVERRIDE_OPTIONS
;
817 /* Excess precision other than "fast" requires front-end
819 if (c_dialect_cxx ())
821 if (flag_excess_precision
== EXCESS_PRECISION_STANDARD
)
822 sorry ("%<-fexcess-precision=standard%> for C++");
823 flag_excess_precision
= EXCESS_PRECISION_FAST
;
825 else if (flag_excess_precision
== EXCESS_PRECISION_DEFAULT
)
826 flag_excess_precision
= (flag_iso
? EXCESS_PRECISION_STANDARD
827 : EXCESS_PRECISION_FAST
);
829 /* ISO C restricts floating-point expression contraction to within
830 source-language expressions (-ffp-contract=on, currently an alias
831 for -ffp-contract=off). */
834 && (OPTION_SET_P (flag_fp_contract_mode
)
835 == (enum fp_contract_mode
) 0)
836 && flag_unsafe_math_optimizations
== 0)
837 flag_fp_contract_mode
= FP_CONTRACT_OFF
;
839 /* If we are compiling C, and we are outside of a standards mode,
840 we can permit the new values from ISO/IEC TS 18661-3 for
841 FLT_EVAL_METHOD. Otherwise, we must restrict the possible values to
842 the set specified in ISO C99/C11. */
845 && (OPTION_SET_P (flag_permitted_flt_eval_methods
)
846 == PERMITTED_FLT_EVAL_METHODS_DEFAULT
))
847 flag_permitted_flt_eval_methods
= PERMITTED_FLT_EVAL_METHODS_TS_18661
;
849 flag_permitted_flt_eval_methods
= PERMITTED_FLT_EVAL_METHODS_C11
;
851 /* C2X Annex F does not permit certain built-in functions to raise
854 SET_OPTION_IF_UNSET (&global_options
, &global_options_set
,
855 flag_fp_int_builtin_inexact
, 0);
857 /* By default we use C99 inline semantics in GNU99 or C99 mode. C99
858 inline semantics are not supported in GNU89 or C89 mode. */
859 if (flag_gnu89_inline
== -1)
860 flag_gnu89_inline
= !flag_isoc99
;
861 else if (!flag_gnu89_inline
&& !flag_isoc99
)
862 error ("%<-fno-gnu89-inline%> is only supported in GNU99 or C99 mode");
864 /* Default to ObjC sjlj exception handling if NeXT runtime < v2. */
865 if (flag_objc_sjlj_exceptions
< 0)
866 flag_objc_sjlj_exceptions
= (flag_next_runtime
&& flag_objc_abi
< 2);
867 if (flag_objc_exceptions
&& !flag_objc_sjlj_exceptions
)
870 /* If -ffreestanding, -fno-hosted or -fno-builtin then disable
871 pattern recognition. */
873 SET_OPTION_IF_UNSET (&global_options
, &global_options_set
,
874 flag_tree_loop_distribute_patterns
, 0);
876 /* -Woverlength-strings is off by default, but is enabled by -Wpedantic.
877 It is never enabled in C++, as the minimum limit is not normative
879 if (c_dialect_cxx ())
880 warn_overlength_strings
= 0;
882 /* Wmain is enabled by default in C++ but not in C. */
883 /* Wmain is disabled by default for -ffreestanding (!flag_hosted),
884 even if -Wall or -Wpedantic was given (warn_main will be 2 if set
885 by -Wall, 1 if set by -Wmain). */
887 warn_main
= (c_dialect_cxx () && flag_hosted
) ? 1 : 0;
888 else if (warn_main
== 2)
889 warn_main
= flag_hosted
? 1 : 0;
891 /* In C, -Wall and -Wc++-compat enable -Wenum-compare; if it has not
892 yet been set, it is disabled by default. In C++, it is enabled
894 if (warn_enum_compare
== -1)
895 warn_enum_compare
= c_dialect_cxx () ? 1 : 0;
897 /* -Wpacked-bitfield-compat is on by default for the C languages. The
898 warning is issued in stor-layout.cc which is not part of the front-end so
899 we need to selectively turn it on here. */
900 if (warn_packed_bitfield_compat
== -1)
901 warn_packed_bitfield_compat
= 1;
903 /* Special format checking options don't work without -Wformat; warn if
907 warning (OPT_Wformat_y2k
,
908 "%<-Wformat-y2k%> ignored without %<-Wformat%>");
909 warning (OPT_Wformat_extra_args
,
910 "%<-Wformat-extra-args%> ignored without %<-Wformat%>");
911 warning (OPT_Wformat_zero_length
,
912 "%<-Wformat-zero-length%> ignored without %<-Wformat%>");
913 warning (OPT_Wformat_nonliteral
,
914 "%<-Wformat-nonliteral%> ignored without %<-Wformat%>");
915 warning (OPT_Wformat_contains_nul
,
916 "%<-Wformat-contains-nul%> ignored without %<-Wformat%>");
917 warning (OPT_Wformat_security
,
918 "%<-Wformat-security%> ignored without %<-Wformat%>");
921 /* -Wimplicit-function-declaration is enabled by default for C99. */
922 if (warn_implicit_function_declaration
== -1)
923 warn_implicit_function_declaration
= flag_isoc99
;
925 /* -Wimplicit-int is enabled by default for C99. */
926 if (warn_implicit_int
== -1)
927 warn_implicit_int
= flag_isoc99
;
929 /* -Wold-style-definition is enabled by default for C2X. */
930 if (warn_old_style_definition
== -1)
931 warn_old_style_definition
= flag_isoc2x
;
933 /* -Wshift-overflow is enabled by default in C99 and C++11 modes. */
934 if (warn_shift_overflow
== -1)
935 warn_shift_overflow
= cxx_dialect
>= cxx11
|| flag_isoc99
;
937 /* -Wshift-negative-value is enabled by -Wextra in C99 and C++11 modes. */
938 if (warn_shift_negative_value
== -1)
939 warn_shift_negative_value
= (extra_warnings
940 && (cxx_dialect
>= cxx11
|| flag_isoc99
));
942 /* -Wregister is enabled by default in C++17. */
943 SET_OPTION_IF_UNSET (&global_options
, &global_options_set
, warn_register
,
944 cxx_dialect
>= cxx17
);
946 /* -Wcomma-subscript is enabled by default in C++20. */
947 SET_OPTION_IF_UNSET (&global_options
, &global_options_set
,
948 warn_comma_subscript
,
950 || (cxx_dialect
== cxx20
&& warn_deprecated
));
952 /* -Wvolatile is enabled by default in C++20. */
953 SET_OPTION_IF_UNSET (&global_options
, &global_options_set
, warn_volatile
,
954 cxx_dialect
>= cxx20
&& warn_deprecated
);
956 /* -Wdeprecated-enum-enum-conversion is enabled by default in C++20. */
957 SET_OPTION_IF_UNSET (&global_options
, &global_options_set
,
958 warn_deprecated_enum_enum_conv
,
959 cxx_dialect
>= cxx20
&& warn_deprecated
);
961 /* -Wdeprecated-enum-float-conversion is enabled by default in C++20. */
962 SET_OPTION_IF_UNSET (&global_options
, &global_options_set
,
963 warn_deprecated_enum_float_conv
,
964 cxx_dialect
>= cxx20
&& warn_deprecated
);
966 /* Declone C++ 'structors if -Os. */
967 if (flag_declone_ctor_dtor
== -1)
968 flag_declone_ctor_dtor
= optimize_size
;
970 if (flag_abi_compat_version
== 1)
972 warning (0, "%<-fabi-compat-version=1%> is not supported, using =2");
973 flag_abi_compat_version
= 2;
976 /* Change flag_abi_version to be the actual current ABI level, for the
977 benefit of c_cpp_builtins, and to make comparison simpler. */
978 const int latest_abi_version
= 17;
979 /* Generate compatibility aliases for ABI v13 (8.2) by default. */
980 const int abi_compat_default
= 13;
982 #define clamp(X) if (X == 0 || X > latest_abi_version) X = latest_abi_version
983 clamp (flag_abi_version
);
984 clamp (warn_abi_version
);
985 clamp (flag_abi_compat_version
);
988 /* Default -Wabi= or -fabi-compat-version= from each other. */
989 if (warn_abi_version
== -1 && flag_abi_compat_version
!= -1)
990 warn_abi_version
= flag_abi_compat_version
;
991 else if (flag_abi_compat_version
== -1 && warn_abi_version
!= -1)
992 flag_abi_compat_version
= warn_abi_version
;
993 else if (warn_abi_version
== -1 && flag_abi_compat_version
== -1)
995 warn_abi_version
= latest_abi_version
;
996 if (flag_abi_version
== latest_abi_version
)
998 auto_diagnostic_group d
;
999 if (warning (OPT_Wabi
, "%<-Wabi%> won%'t warn about anything"))
1001 inform (input_location
, "%<-Wabi%> warns about differences "
1002 "from the most up-to-date ABI, which is also used "
1004 inform (input_location
, "use e.g. %<-Wabi=11%> to warn about "
1005 "changes from GCC 7");
1007 flag_abi_compat_version
= abi_compat_default
;
1010 flag_abi_compat_version
= latest_abi_version
;
1013 /* By default, enable the new inheriting constructor semantics along with ABI
1014 11. New and old should coexist fine, but it is a change in what
1015 artificial symbols are generated. */
1016 SET_OPTION_IF_UNSET (&global_options
, &global_options_set
,
1017 flag_new_inheriting_ctors
,
1018 abi_version_at_least (11));
1020 /* For GCC 7, only enable DR150 resolution by default if -std=c++17. */
1021 SET_OPTION_IF_UNSET (&global_options
, &global_options_set
, flag_new_ttp
,
1022 cxx_dialect
>= cxx17
);
1024 /* C++11 guarantees forward progress. */
1025 SET_OPTION_IF_UNSET (&global_options
, &global_options_set
, flag_finite_loops
,
1026 optimize
>= 2 && cxx_dialect
>= cxx11
);
1028 /* It's OK to discard calls to pure/const functions that might throw. */
1029 SET_OPTION_IF_UNSET (&global_options
, &global_options_set
,
1030 flag_delete_dead_exceptions
, true);
1032 if (cxx_dialect
>= cxx11
)
1034 /* If we're allowing C++0x constructs, don't warn about C++98
1035 identifiers which are keywords in C++0x. */
1036 warn_cxx11_compat
= 0;
1037 cpp_opts
->cpp_warn_cxx11_compat
= 0;
1039 if (warn_narrowing
== -1)
1042 /* Unless -f{,no-}ext-numeric-literals has been used explicitly,
1043 for -std=c++{11,14,17,20,23} default to -fno-ext-numeric-literals. */
1044 if (flag_iso
&& !OPTION_SET_P (flag_ext_numeric_literals
))
1045 cpp_opts
->ext_numeric_literals
= 0;
1047 else if (warn_narrowing
== -1)
1050 /* C++17 has stricter evaluation order requirements; let's use some of them
1051 for earlier C++ as well, so chaining works as expected. */
1052 if (c_dialect_cxx ()
1053 && flag_strong_eval_order
== -1)
1054 flag_strong_eval_order
= (cxx_dialect
>= cxx17
? 2 : 1);
1056 if (flag_implicit_constexpr
&& cxx_dialect
< cxx14
)
1057 flag_implicit_constexpr
= false;
1059 /* Global sized deallocation is new in C++14. */
1060 if (flag_sized_deallocation
== -1)
1061 flag_sized_deallocation
= (cxx_dialect
>= cxx14
);
1063 /* char8_t support is new in C++20. */
1064 if (flag_char8_t
== -1)
1065 flag_char8_t
= (cxx_dialect
>= cxx20
);
1067 if (flag_extern_tls_init
)
1069 if (!TARGET_SUPPORTS_ALIASES
|| !SUPPORTS_WEAK
)
1071 /* Lazy TLS initialization for a variable in another TU requires
1072 alias and weak reference support. */
1073 if (flag_extern_tls_init
> 0)
1074 sorry ("external TLS initialization functions not supported "
1077 flag_extern_tls_init
= 0;
1080 flag_extern_tls_init
= 1;
1083 /* Enable by default only for C++ and C++ with ObjC extensions. */
1084 if (warn_return_type
== -1 && c_dialect_cxx ())
1085 warn_return_type
= 1;
1087 /* C++20 is the final version of concepts. We still use -fconcepts
1088 to know when concepts are enabled. Note that -fconcepts-ts can
1089 be used to include additional features, although modified to
1090 work with the standard. */
1091 if (cxx_dialect
>= cxx20
|| flag_concepts_ts
)
1093 else if (flag_concepts
)
1094 /* For -std=c++17 -fconcepts, imply -fconcepts-ts. */
1095 flag_concepts_ts
= 1;
1097 if (num_in_fnames
> 1)
1098 error ("too many filenames given; type %<%s %s%> for usage",
1099 progname
, "--help");
1101 if (flag_preprocess_only
)
1103 /* Open the output now. We must do so even if flag_no_output is
1104 on, because there may be other output than from the actual
1105 preprocessing (e.g. from -dM). */
1106 if (out_fname
[0] == '\0')
1107 out_stream
= stdout
;
1109 out_stream
= fopen (out_fname
, "w");
1111 if (out_stream
== NULL
)
1112 fatal_error (input_location
, "opening output file %s: %m", out_fname
);
1114 init_pp_output (out_stream
);
1120 /* When writing a PCH file, avoid reading some other PCH file,
1121 because the default address space slot then can't be used
1122 for the output PCH file. */
1125 c_common_no_more_pch ();
1126 /* Only -g0 and -gdwarf* are supported with PCH, for other
1127 debug formats we warn here and refuse to load any PCH files. */
1128 if (write_symbols
!= NO_DEBUG
&& write_symbols
!= DWARF2_DEBUG
)
1129 warning (OPT_Wdeprecated
,
1130 "the %qs debug info cannot be used with "
1131 "pre-compiled headers",
1132 debug_set_names (write_symbols
& ~DWARF2_DEBUG
));
1134 else if (write_symbols
!= NO_DEBUG
&& write_symbols
!= DWARF2_DEBUG
)
1135 c_common_no_more_pch ();
1137 /* Yuk. WTF is this? I do know ObjC relies on it somewhere. */
1138 input_location
= UNKNOWN_LOCATION
;
1141 struct cpp_callbacks
*cb
= cpp_get_callbacks (parse_in
);
1142 cb
->file_change
= cb_file_change
;
1143 cb
->dir_change
= cb_dir_change
;
1144 if (lang_hooks
.preprocess_options
)
1145 lang_hooks
.preprocess_options (parse_in
);
1146 cpp_post_options (parse_in
);
1147 init_global_opts_from_cpp (&global_options
, cpp_get_options (parse_in
));
1149 /* Let diagnostics infrastructure know how to convert input files the same
1150 way libcpp will do it, namely using the configured input charset and
1151 skipping a UTF-8 BOM if present. */
1152 diagnostic_initialize_input_context (global_dc
,
1153 c_common_input_charset_cb
, true);
1154 input_location
= UNKNOWN_LOCATION
;
1156 *pfilename
= this_input_filename
1157 = cpp_read_main_file (parse_in
, in_fnames
[0],
1158 /* We'll inject preamble pieces if this is
1159 not preprocessed. */
1160 !cpp_opts
->preprocessed
);
1162 /* Don't do any compilation or preprocessing if there is no input file. */
1163 if (this_input_filename
== NULL
)
1169 if (flag_working_directory
1170 && flag_preprocess_only
&& !flag_no_line_commands
)
1171 pp_dir_change (parse_in
, get_src_pwd ());
1173 /* Disable LTO output when outputting a precompiled header. */
1174 if (pch_file
&& flag_lto
)
1177 flag_generate_lto
= 0;
1180 return flag_preprocess_only
;
1183 /* Front end initialization common to C, ObjC and C++. */
1185 c_common_init (void)
1187 /* Set up preprocessor arithmetic. Must be done after call to
1188 c_common_nodes_and_builtins for type nodes to be good. */
1189 cpp_opts
->precision
= TYPE_PRECISION (intmax_type_node
);
1190 cpp_opts
->char_precision
= TYPE_PRECISION (char_type_node
);
1191 cpp_opts
->int_precision
= TYPE_PRECISION (integer_type_node
);
1192 cpp_opts
->wchar_precision
= TYPE_PRECISION (wchar_type_node
);
1193 cpp_opts
->unsigned_wchar
= TYPE_UNSIGNED (wchar_type_node
);
1194 cpp_opts
->bytes_big_endian
= BYTES_BIG_ENDIAN
;
1196 /* This can't happen until after wchar_precision and bytes_big_endian
1198 cpp_init_iconv (parse_in
);
1203 fputs ("Compiler executable checksum: ", stderr
);
1204 for (i
= 0; i
< 16; i
++)
1205 fprintf (stderr
, "%02x", executable_checksum
[i
]);
1206 putc ('\n', stderr
);
1209 /* Has to wait until now so that cpplib has its hash table. */
1212 if (flag_preprocess_only
)
1214 c_finish_options ();
1215 preprocess_file (parse_in
);
1222 /* Initialize the integrated preprocessor after debug output has been
1223 initialized; loop over each input file. */
1225 c_common_parse_file (void)
1232 c_finish_options ();
1233 /* Open the dump file to use for the original dump output
1234 here, to be used during parsing for the current file. */
1235 original_dump_file
= dump_begin (TDI_original
, &original_dump_flags
);
1240 /* And end the main input file, if the debug writer wants it */
1241 if (debug_hooks
->start_end_main_source_file
)
1242 (*debug_hooks
->end_source_file
) (0);
1243 if (++i
>= num_in_fnames
)
1245 cpp_undef_all (parse_in
);
1246 cpp_clear_file_cache (parse_in
);
1248 = cpp_read_main_file (parse_in
, in_fnames
[i
]);
1249 if (original_dump_file
)
1251 dump_end (TDI_original
, original_dump_file
);
1252 original_dump_file
= NULL
;
1254 /* If an input file is missing, abandon further compilation.
1255 cpplib has issued a diagnostic. */
1256 if (!this_input_filename
)
1260 c_parse_final_cleanups ();
1263 /* Returns the appropriate dump file for PHASE to dump with FLAGS. */
1266 get_dump_info (int phase
, dump_flags_t
*flags
)
1268 gcc_assert (phase
== TDI_original
);
1270 *flags
= original_dump_flags
;
1271 return original_dump_file
;
1274 /* Common finish hook for the C, ObjC and C++ front ends. */
1276 c_common_finish (void)
1278 FILE *deps_stream
= NULL
;
1280 /* Note that we write the dependencies even if there are errors. This is
1281 useful for handling outdated generated headers that now trigger errors
1282 (for example, with #error) which would be resolved by re-generating
1283 them. In a sense, this complements -MG. */
1284 if (cpp_opts
->deps
.style
!= DEPS_NONE
)
1286 /* If -M or -MM was seen without -MF, default output to the
1289 deps_stream
= out_stream
;
1290 else if (deps_file
[0] == '-' && deps_file
[1] == '\0')
1291 deps_stream
= stdout
;
1294 deps_stream
= fopen (deps_file
, deps_append
? "a": "w");
1296 fatal_error (input_location
, "opening dependency file %s: %m",
1301 /* For performance, avoid tearing down cpplib's internal structures
1302 with cpp_destroy (). */
1303 cpp_finish (parse_in
, deps_stream
);
1305 if (deps_stream
&& deps_stream
!= out_stream
&& deps_stream
!= stdout
1306 && (ferror (deps_stream
) || fclose (deps_stream
)))
1307 fatal_error (input_location
, "closing dependency file %s: %m", deps_file
);
1309 if (out_stream
&& (ferror (out_stream
) || fclose (out_stream
)))
1310 fatal_error (input_location
, "when writing output to %s: %m", out_fname
);
1313 /* Either of two environment variables can specify output of
1314 dependencies. Their value is either "OUTPUT_FILE" or "OUTPUT_FILE
1315 DEPS_TARGET", where OUTPUT_FILE is the file to write deps info to
1316 and DEPS_TARGET is the target to mention in the deps. They also
1317 result in dependency information being appended to the output file
1318 rather than overwriting it, and like Sun's compiler
1319 SUNPRO_DEPENDENCIES suppresses the dependency on the main file. */
1321 check_deps_environment_vars (void)
1325 spec
= getenv ("DEPENDENCIES_OUTPUT");
1327 cpp_opts
->deps
.style
= DEPS_USER
;
1330 spec
= getenv ("SUNPRO_DEPENDENCIES");
1333 cpp_opts
->deps
.style
= DEPS_SYSTEM
;
1334 cpp_opts
->deps
.ignore_main_file
= true;
1340 /* Find the space before the DEPS_TARGET, if there is one. */
1341 char *s
= strchr (spec
, ' ');
1344 /* Let the caller perform MAKE quoting. */
1345 defer_opt (OPT_MT
, s
+ 1);
1349 /* Command line -MF overrides environment variables and default. */
1358 /* Handle deferred command line switches. */
1360 handle_deferred_opts (void)
1362 /* Avoid allocating the deps buffer if we don't need it.
1363 (This flag may be true without there having been -MT or -MQ
1364 options, but we'll still need the deps buffer.) */
1368 if (mkdeps
*deps
= cpp_get_deps (parse_in
))
1369 for (unsigned i
= 0; i
< deferred_count
; i
++)
1371 struct deferred_opt
*opt
= &deferred_opts
[i
];
1373 if (opt
->code
== OPT_MT
|| opt
->code
== OPT_MQ
)
1374 deps_add_target (deps
, opt
->arg
, opt
->code
== OPT_MQ
);
1378 /* These settings are appropriate for GCC, but not necessarily so for
1379 cpplib as a library. */
1381 sanitize_cpp_opts (void)
1383 /* If we don't know what style of dependencies to output, complain
1384 if any other dependency switches have been given. */
1385 if (deps_seen
&& cpp_opts
->deps
.style
== DEPS_NONE
)
1386 error ("to generate dependencies you must specify either %<-M%> "
1389 /* -dM and dependencies suppress normal output; do it here so that
1390 the last -d[MDN] switch overrides earlier ones. */
1391 if (flag_dump_macros
== 'M')
1394 /* By default, -fdirectives-only implies -dD. This allows subsequent phases
1395 to perform proper macro expansion. */
1396 if (cpp_opts
->directives_only
&& !cpp_opts
->preprocessed
&& !flag_dump_macros
)
1397 flag_dump_macros
= 'D';
1399 /* Disable -dD, -dN and -dI if normal output is suppressed. Allow
1400 -dM since at least glibc relies on -M -dM to work. */
1401 /* Also, flag_no_output implies flag_no_line_commands, always. */
1404 if (flag_dump_macros
!= 'M')
1405 flag_dump_macros
= 0;
1406 flag_dump_includes
= 0;
1407 flag_no_line_commands
= 1;
1409 else if (cpp_opts
->deps
.missing_files
)
1410 error ("%<-MG%> may only be used with %<-M%> or %<-MM%>");
1412 cpp_opts
->unsigned_char
= !flag_signed_char
;
1413 cpp_opts
->stdc_0_in_system_headers
= STDC_0_IN_SYSTEM_HEADERS
;
1415 /* Wlong-long is disabled by default. It is enabled by:
1416 [-Wpedantic | -Wtraditional] -std=[gnu|c]++98 ; or
1417 [-Wpedantic | -Wtraditional] -std=non-c99
1419 Either -Wlong-long or -Wno-long-long override any other settings.
1420 ??? These conditions should be handled in c.opt. */
1421 if (warn_long_long
== -1)
1423 warn_long_long
= ((pedantic
|| warn_traditional
)
1424 && (c_dialect_cxx () ? cxx_dialect
== cxx98
: !flag_isoc99
));
1425 cpp_opts
->cpp_warn_long_long
= warn_long_long
;
1428 /* If we're generating preprocessor output, emit current directory
1429 if explicitly requested or if debugging information is enabled.
1430 ??? Maybe we should only do it for debugging formats that
1431 actually output the current directory? */
1432 if (flag_working_directory
== -1)
1433 flag_working_directory
= (debug_info_level
!= DINFO_LEVEL_NONE
);
1435 if (warn_implicit_fallthrough
< 5)
1436 cpp_opts
->cpp_warn_implicit_fallthrough
= warn_implicit_fallthrough
;
1438 cpp_opts
->cpp_warn_implicit_fallthrough
= 0;
1440 if (cpp_opts
->directives_only
)
1442 if (cpp_warn_unused_macros
)
1443 error ("%<-fdirectives-only%> is incompatible "
1444 "with %<-Wunused-macros%>");
1445 if (cpp_opts
->traditional
)
1446 error ("%<-fdirectives-only%> is incompatible with %<-traditional%>");
1450 /* Add include path with a prefix at the front of its name. */
1452 add_prefixed_path (const char *suffix
, incpath_kind chain
)
1456 size_t prefix_len
, suffix_len
;
1458 suffix_len
= strlen (suffix
);
1459 prefix
= iprefix
? iprefix
: cpp_GCC_INCLUDE_DIR
;
1460 prefix_len
= iprefix
? strlen (iprefix
) : cpp_GCC_INCLUDE_DIR_len
;
1462 path
= (char *) xmalloc (prefix_len
+ suffix_len
+ 1);
1463 memcpy (path
, prefix
, prefix_len
);
1464 memcpy (path
+ prefix_len
, suffix
, suffix_len
);
1465 path
[prefix_len
+ suffix_len
] = '\0';
1467 add_path (path
, chain
, 0, false);
1470 /* Handle -D, -U, -A, -imacros, and the first -include. */
1472 c_finish_options (void)
1474 if (!cpp_opts
->preprocessed
)
1476 const line_map_ordinary
*bltin_map
1477 = linemap_check_ordinary (linemap_add (line_table
, LC_RENAME
, 0,
1478 _("<built-in>"), 0));
1479 cb_file_change (parse_in
, bltin_map
);
1480 linemap_line_start (line_table
, 0, 1);
1482 /* Make sure all of the builtins about to be declared have
1483 BUILTINS_LOCATION has their location_t. */
1484 cpp_force_token_locations (parse_in
, BUILTINS_LOCATION
);
1486 cpp_init_builtins (parse_in
, flag_hosted
);
1487 c_cpp_builtins (parse_in
);
1489 /* We're about to send user input to cpplib, so make it warn for
1490 things that we previously (when we sent it internal definitions)
1491 told it to not warn.
1493 C99 permits implementation-defined characters in identifiers.
1494 The documented meaning of -std= is to turn off extensions that
1495 conflict with the specified standard, and since a strictly
1496 conforming program cannot contain a '$', we do not condition
1497 their acceptance on the -std= setting. */
1498 cpp_opts
->warn_dollars
= (cpp_opts
->cpp_pedantic
&& !cpp_opts
->c99
);
1500 const line_map_ordinary
*cmd_map
1501 = linemap_check_ordinary (linemap_add (line_table
, LC_RENAME
, 0,
1502 _("<command-line>"), 0));
1503 cb_file_change (parse_in
, cmd_map
);
1504 linemap_line_start (line_table
, 0, 1);
1506 /* All command line defines must have the same location. */
1507 cpp_force_token_locations (parse_in
, line_table
->highest_line
);
1508 for (size_t i
= 0; i
< deferred_count
; i
++)
1510 struct deferred_opt
*opt
= &deferred_opts
[i
];
1512 if (opt
->code
== OPT_D
)
1513 cpp_define (parse_in
, opt
->arg
);
1514 else if (opt
->code
== OPT_U
)
1515 cpp_undef (parse_in
, opt
->arg
);
1516 else if (opt
->code
== OPT_A
)
1518 if (opt
->arg
[0] == '-')
1519 cpp_unassert (parse_in
, opt
->arg
+ 1);
1521 cpp_assert (parse_in
, opt
->arg
);
1525 cpp_stop_forcing_token_locations (parse_in
);
1527 else if (cpp_opts
->directives_only
)
1528 cpp_init_special_builtins (parse_in
);
1530 /* Start the main input file, if the debug writer wants it. */
1531 if (debug_hooks
->start_end_main_source_file
1532 && !flag_preprocess_only
)
1533 (*debug_hooks
->start_source_file
) (0, this_input_filename
);
1535 if (!cpp_opts
->preprocessed
)
1536 /* Handle -imacros after -D and -U. */
1537 for (size_t i
= 0; i
< deferred_count
; i
++)
1539 struct deferred_opt
*opt
= &deferred_opts
[i
];
1541 if (opt
->code
== OPT_imacros
1542 && cpp_push_include (parse_in
, opt
->arg
))
1544 /* Disable push_command_line_include callback for now. */
1545 include_cursor
= deferred_count
+ 1;
1546 cpp_scan_nooutput (parse_in
);
1551 push_command_line_include ();
1554 /* Give CPP the next file given by -include, if any. */
1556 push_command_line_include (void)
1558 /* This can happen if disabled by -imacros for example.
1559 Punt so that we don't set "<command-line>" as the filename for
1561 if (include_cursor
> deferred_count
)
1564 if (!done_preinclude
)
1566 done_preinclude
= true;
1567 if (flag_hosted
&& std_inc
&& !cpp_opts
->preprocessed
)
1569 const char *preinc
= targetcm
.c_preinclude ();
1570 if (preinc
&& cpp_push_default_include (parse_in
, preinc
))
1575 pch_cpp_save_state ();
1577 while (include_cursor
< deferred_count
)
1579 struct deferred_opt
*opt
= &deferred_opts
[include_cursor
++];
1581 if (!cpp_opts
->preprocessed
&& opt
->code
== OPT_include
1582 && cpp_push_include (parse_in
, opt
->arg
))
1586 if (include_cursor
== deferred_count
)
1589 /* -Wunused-macros should only warn about macros defined hereafter. */
1590 cpp_opts
->warn_unused_macros
= cpp_warn_unused_macros
;
1591 /* Restore the line map back to the main file. */
1592 if (!cpp_opts
->preprocessed
)
1594 cpp_change_file (parse_in
, LC_RENAME
, this_input_filename
);
1595 if (lang_hooks
.preprocess_main_file
)
1596 /* We're starting the main file. Inform the FE of that. */
1597 lang_hooks
.preprocess_main_file
1598 (parse_in
, line_table
, LINEMAPS_LAST_ORDINARY_MAP (line_table
));
1601 /* Set this here so the client can change the option if it wishes,
1602 and after stacking the main file so we don't trace the main file. */
1603 line_table
->trace_includes
= cpp_opts
->print_include_names
;
1607 /* File change callback. Has to handle -include files. */
1609 cb_file_change (cpp_reader
*reader
, const line_map_ordinary
*new_map
)
1611 if (flag_preprocess_only
)
1612 pp_file_change (new_map
);
1614 fe_file_change (new_map
);
1616 if (new_map
&& cpp_opts
->preprocessed
1617 && lang_hooks
.preprocess_main_file
&& MAIN_FILE_P (new_map
)
1618 && ORDINARY_MAP_STARTING_LINE_NUMBER (new_map
))
1619 /* We're starting the main file. Inform the FE of that. */
1620 lang_hooks
.preprocess_main_file (reader
, line_table
, new_map
);
1623 && (new_map
->reason
== LC_ENTER
|| new_map
->reason
== LC_RENAME
))
1625 /* Signal to plugins that a file is included. This could happen
1626 several times with the same file path, e.g. because of
1627 several '#include' or '#line' directives... */
1628 invoke_plugin_callbacks
1629 (PLUGIN_INCLUDE_FILE
,
1630 const_cast<char*> (ORDINARY_MAP_FILE_NAME (new_map
)));
1633 if (new_map
== 0 || (new_map
->reason
== LC_LEAVE
&& MAIN_FILE_P (new_map
)))
1635 pch_cpp_save_state ();
1636 push_command_line_include ();
1641 cb_dir_change (cpp_reader
* ARG_UNUSED (pfile
), const char *dir
)
1643 if (!set_src_pwd (dir
))
1644 warning (0, "too late for # directive to set debug directory");
1647 /* Set the C 89 standard (with 1994 amendments if C94, without GNU
1648 extensions if ISO). There is no concept of gnu94. */
1650 set_std_c89 (int c94
, int iso
)
1652 cpp_set_lang (parse_in
, c94
? CLK_STDC94
: iso
? CLK_STDC89
: CLK_GNUC89
);
1655 flag_no_gnu_keywords
= iso
;
1656 flag_no_nonansi_builtin
= iso
;
1661 lang_hooks
.name
= "GNU C89";
1664 /* Set the C 99 standard (without GNU extensions if ISO). */
1666 set_std_c99 (int iso
)
1668 cpp_set_lang (parse_in
, iso
? CLK_STDC99
: CLK_GNUC99
);
1670 flag_no_nonansi_builtin
= iso
;
1676 lang_hooks
.name
= "GNU C99";
1679 /* Set the C 11 standard (without GNU extensions if ISO). */
1681 set_std_c11 (int iso
)
1683 cpp_set_lang (parse_in
, iso
? CLK_STDC11
: CLK_GNUC11
);
1685 flag_no_nonansi_builtin
= iso
;
1691 lang_hooks
.name
= "GNU C11";
1694 /* Set the C 17 standard (without GNU extensions if ISO). */
1696 set_std_c17 (int iso
)
1698 cpp_set_lang (parse_in
, iso
? CLK_STDC17
: CLK_GNUC17
);
1700 flag_no_nonansi_builtin
= iso
;
1706 lang_hooks
.name
= "GNU C17";
1709 /* Set the C 2X standard (without GNU extensions if ISO). */
1711 set_std_c2x (int iso
)
1713 cpp_set_lang (parse_in
, iso
? CLK_STDC2X
: CLK_GNUC2X
);
1715 flag_no_nonansi_builtin
= iso
;
1721 lang_hooks
.name
= "GNU C2X";
1725 /* Set the C++ 98 standard (without GNU extensions if ISO). */
1727 set_std_cxx98 (int iso
)
1729 cpp_set_lang (parse_in
, iso
? CLK_CXX98
: CLK_GNUCXX
);
1730 flag_no_gnu_keywords
= iso
;
1731 flag_no_nonansi_builtin
= iso
;
1735 cxx_dialect
= cxx98
;
1736 lang_hooks
.name
= "GNU C++98";
1739 /* Set the C++ 2011 standard (without GNU extensions if ISO). */
1741 set_std_cxx11 (int iso
)
1743 cpp_set_lang (parse_in
, iso
? CLK_CXX11
: CLK_GNUCXX11
);
1744 flag_no_gnu_keywords
= iso
;
1745 flag_no_nonansi_builtin
= iso
;
1747 /* C++11 includes the C99 standard library. */
1750 cxx_dialect
= cxx11
;
1751 lang_hooks
.name
= "GNU C++11";
1754 /* Set the C++ 2014 standard (without GNU extensions if ISO). */
1756 set_std_cxx14 (int iso
)
1758 cpp_set_lang (parse_in
, iso
? CLK_CXX14
: CLK_GNUCXX14
);
1759 flag_no_gnu_keywords
= iso
;
1760 flag_no_nonansi_builtin
= iso
;
1762 /* C++14 includes the C99 standard library. */
1765 cxx_dialect
= cxx14
;
1766 lang_hooks
.name
= "GNU C++14";
1769 /* Set the C++ 2017 standard (without GNU extensions if ISO). */
1771 set_std_cxx17 (int iso
)
1773 cpp_set_lang (parse_in
, iso
? CLK_CXX17
: CLK_GNUCXX17
);
1774 flag_no_gnu_keywords
= iso
;
1775 flag_no_nonansi_builtin
= iso
;
1777 /* C++17 includes the C11 standard library. */
1781 cxx_dialect
= cxx17
;
1782 lang_hooks
.name
= "GNU C++17";
1785 /* Set the C++ 2020 standard (without GNU extensions if ISO). */
1787 set_std_cxx20 (int iso
)
1789 cpp_set_lang (parse_in
, iso
? CLK_CXX20
: CLK_GNUCXX20
);
1790 flag_no_gnu_keywords
= iso
;
1791 flag_no_nonansi_builtin
= iso
;
1793 /* C++20 includes the C11 standard library. */
1797 /* C++20 includes coroutines. */
1798 flag_coroutines
= true;
1799 cxx_dialect
= cxx20
;
1800 lang_hooks
.name
= "GNU C++20";
1803 /* Set the C++ 2023 standard (without GNU extensions if ISO). */
1805 set_std_cxx23 (int iso
)
1807 cpp_set_lang (parse_in
, iso
? CLK_CXX23
: CLK_GNUCXX23
);
1808 flag_no_gnu_keywords
= iso
;
1809 flag_no_nonansi_builtin
= iso
;
1811 /* C++23 includes the C11 standard library. */
1815 /* C++23 includes coroutines. */
1816 flag_coroutines
= true;
1817 cxx_dialect
= cxx23
;
1818 lang_hooks
.name
= "GNU C++23";
1821 /* Args to -d specify what to dump. Silently ignore
1822 unrecognized options; they may be aimed at toplev.cc. */
1824 handle_OPT_d (const char *arg
)
1828 while ((c
= *arg
++) != '\0')
1831 case 'M': /* Dump macros only. */
1832 case 'N': /* Dump names. */
1833 case 'D': /* Dump definitions. */
1834 case 'U': /* Dump used macros. */
1835 flag_dump_macros
= c
;
1839 flag_dump_includes
= 1;