1 /* C/ObjC/C++ command line option handling.
2 Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
3 Contributed by Neil Booth.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
24 #include "coretypes.h"
31 #include "langhooks.h"
32 #include "tree-inline.h"
33 #include "diagnostic.h"
35 #include "cppdefault.h"
36 #include "c-incpath.h"
37 #include "debug.h" /* For debug_hooks. */
42 #ifndef DOLLARS_IN_IDENTIFIERS
43 # define DOLLARS_IN_IDENTIFIERS true
46 #ifndef TARGET_SYSTEM_ROOT
47 # define TARGET_SYSTEM_ROOT NULL
51 #define TARGET_OPTF(ARG)
55 static cpp_options
*cpp_opts
;
58 static const char *this_input_filename
;
60 /* Filename and stream for preprocessed output. */
61 static const char *out_fname
;
62 static FILE *out_stream
;
64 /* Append dependencies to deps_file. */
65 static bool deps_append
;
67 /* If dependency switches (-MF etc.) have been given. */
68 static bool deps_seen
;
73 /* If -lang-fortran seen. */
74 static bool lang_fortran
= false;
76 /* Dependency output file. */
77 static const char *deps_file
;
79 /* The prefix given by -iprefix, if any. */
80 static const char *iprefix
;
82 /* The multilib directory given by -imultilib, if any. */
83 static const char *imultilib
;
85 /* The system root, if any. Overridden by -isysroot. */
86 static const char *sysroot
= TARGET_SYSTEM_ROOT
;
88 /* Zero disables all standard directories for headers. */
89 static bool std_inc
= true;
91 /* Zero disables the C++-specific standard directories for headers. */
92 static bool std_cxx_inc
= true;
94 /* If the quote chain has been split by -I-. */
95 static bool quote_chain_split
;
97 /* If -Wunused-macros. */
98 static bool warn_unused_macros
;
100 /* If -Wvariadic-macros. */
101 static bool warn_variadic_macros
= true;
103 /* Number of deferred options. */
104 static size_t deferred_count
;
106 /* Number of deferred options scanned for -include. */
107 static size_t include_cursor
;
109 static void set_Wimplicit (int);
110 static void handle_OPT_d (const char *);
111 static void set_std_cxx98 (int);
112 static void set_std_cxx0x (int);
113 static void set_std_c89 (int, int);
114 static void set_std_c99 (int);
115 static void check_deps_environment_vars (void);
116 static void handle_deferred_opts (void);
117 static void sanitize_cpp_opts (void);
118 static void add_prefixed_path (const char *, size_t);
119 static void push_command_line_include (void);
120 static void cb_file_change (cpp_reader
*, const struct line_map
*);
121 static void cb_dir_change (cpp_reader
*, const char *);
122 static void finish_options (void);
124 #ifndef STDC_0_IN_SYSTEM_HEADERS
125 #define STDC_0_IN_SYSTEM_HEADERS 0
128 /* Holds switches parsed by c_common_handle_option (), but whose
129 handling is deferred to c_common_post_options (). */
130 static void defer_opt (enum opt_code
, const char *);
131 static struct deferred_opt
137 /* Complain that switch CODE expects an argument but none was
138 provided. OPT was the command-line option. Return FALSE to get
139 the default message in opts.c, TRUE if we provide a specialized
142 c_common_missing_argument (const char *opt
, size_t code
)
147 /* Pick up the default message. */
150 case OPT_fconstant_string_class_
:
151 error ("no class name specified with %qs", opt
);
155 error ("assertion missing after %qs", opt
);
160 error ("macro name missing after %qs", opt
);
169 error ("missing path after %qs", opt
);
178 error ("missing filename after %qs", opt
);
183 error ("missing makefile target after %qs", opt
);
190 /* Defer option CODE with argument ARG. */
192 defer_opt (enum opt_code code
, const char *arg
)
194 deferred_opts
[deferred_count
].code
= code
;
195 deferred_opts
[deferred_count
].arg
= arg
;
199 /* Common initialization before parsing options. */
201 c_common_init_options (unsigned int argc
, const char **argv
)
203 static const unsigned int lang_flags
[] = {CL_C
, CL_ObjC
, CL_CXX
, CL_ObjCXX
};
204 unsigned int i
, result
;
206 /* This is conditionalized only because that is the way the front
207 ends used to do it. Maybe this should be unconditional? */
208 if (c_dialect_cxx ())
210 /* By default wrap lines at 80 characters. Is getenv
211 ("COLUMNS") preferable? */
212 diagnostic_line_cutoff (global_dc
) = 80;
213 /* By default, emit location information once for every
214 diagnostic message. */
215 diagnostic_prefixing_rule (global_dc
) = DIAGNOSTICS_SHOW_PREFIX_ONCE
;
218 parse_in
= cpp_create_reader (c_dialect_cxx () ? CLK_GNUCXX
: CLK_GNUC89
,
219 ident_hash
, &line_table
);
221 cpp_opts
= cpp_get_options (parse_in
);
222 cpp_opts
->dollars_in_ident
= DOLLARS_IN_IDENTIFIERS
;
223 cpp_opts
->objc
= c_dialect_objc ();
225 /* Reset to avoid warnings on internal definitions. We set it just
226 before passing on command-line options to cpplib. */
227 cpp_opts
->warn_dollars
= 0;
229 flag_exceptions
= c_dialect_cxx ();
230 warn_pointer_arith
= c_dialect_cxx ();
231 warn_write_strings
= c_dialect_cxx();
233 deferred_opts
= XNEWVEC (struct deferred_opt
, argc
);
235 result
= lang_flags
[c_language
];
237 if (c_language
== clk_c
)
239 /* If preprocessing assembly language, accept any of the C-family
240 front end options since the driver may pass them through. */
241 for (i
= 1; i
< argc
; i
++)
242 if (! strcmp (argv
[i
], "-lang-asm"))
244 result
|= CL_C
| CL_ObjC
| CL_CXX
| CL_ObjCXX
;
249 for (i
= 1; i
< argc
; i
++)
250 if (! strcmp (argv
[i
], "-lang-fortran"))
252 result
|= CL_Fortran
;
261 /* Handle switch SCODE with argument ARG. VALUE is true, unless no-
262 form of an -f or -W option was given. Returns 0 if the switch was
263 invalid, a negative number to prevent language-independent
264 processing in toplev.c (a hack necessary for the short-term). */
266 c_common_handle_option (size_t scode
, const char *arg
, int value
)
268 const struct cl_option
*option
= &cl_options
[scode
];
269 enum opt_code code
= (enum opt_code
) scode
;
272 /* Prevent resetting the language standard to a C dialect when the driver
273 has already determined that we're looking at assembler input. */
274 bool preprocessing_asm_p
= (cpp_get_options (parse_in
)->lang
== CLK_ASM
);
279 if (cl_options
[code
].flags
& (CL_C
| CL_CXX
| CL_ObjC
| CL_ObjCXX
))
282 if (lang_fortran
&& (cl_options
[code
].flags
& (CL_Fortran
)))
288 case OPT__output_pch_
:
293 defer_opt (code
, arg
);
297 cpp_opts
->discard_comments
= 0;
301 cpp_opts
->discard_comments
= 0;
302 cpp_opts
->discard_comments_in_macro_exp
= 0;
306 defer_opt (code
, arg
);
310 flag_preprocess_only
= 1;
314 cpp_opts
->print_include_names
= 1;
318 TARGET_OPTF (xstrdup (arg
));
322 if (strcmp (arg
, "-"))
323 add_path (xstrdup (arg
), BRACKET
, 0, true);
326 if (quote_chain_split
)
327 error ("-I- specified twice");
328 quote_chain_split
= true;
329 split_quote_chain ();
330 inform ("obsolete option -I- used, please use -iquote instead");
336 /* When doing dependencies with -M or -MM, suppress normal
337 preprocessed output, but still do -dM etc. as software
338 depends on this. Preprocessed output does occur if -MD, -MMD
339 or environment var dependency generation is used. */
340 cpp_opts
->deps
.style
= (code
== OPT_M
? DEPS_SYSTEM
: DEPS_USER
);
342 cpp_opts
->inhibit_warnings
= 1;
347 cpp_opts
->deps
.style
= (code
== OPT_MD
? DEPS_SYSTEM
: DEPS_USER
);
358 cpp_opts
->deps
.missing_files
= true;
363 cpp_opts
->deps
.phony_targets
= true;
369 defer_opt (code
, arg
);
373 flag_no_line_commands
= 1;
376 case OPT_fworking_directory
:
377 flag_working_directory
= value
;
381 defer_opt (code
, arg
);
387 set_Wimplicit (value
);
388 warn_char_subscripts
= value
;
389 warn_missing_braces
= value
;
390 warn_parentheses
= value
;
391 warn_return_type
= value
;
392 warn_sequence_point
= value
; /* Was C only. */
393 if (c_dialect_cxx ())
394 warn_sign_compare
= value
;
396 warn_strict_aliasing
= value
;
397 warn_string_literal_comparison
= value
;
398 warn_always_true
= value
;
399 warn_array_bounds
= value
;
401 /* Only warn about unknown pragmas that are not in system
403 warn_unknown_pragmas
= value
;
405 /* We save the value of warn_uninitialized, since if they put
406 -Wuninitialized on the command line, we need to generate a
407 warning about not using it without also specifying -O. */
408 if (warn_uninitialized
!= 1)
409 warn_uninitialized
= (value
? 2 : 0);
411 if (!c_dialect_cxx ())
412 /* We set this to 2 here, but 1 in -Wmain, so -ffreestanding
413 can turn it off only if it's not explicit. */
414 warn_main
= value
* 2;
417 /* C++-specific warnings. */
418 warn_reorder
= value
;
419 warn_nontemplate_friend
= value
;
421 warn_write_strings
= true;
424 cpp_opts
->warn_trigraphs
= value
;
425 cpp_opts
->warn_comments
= value
;
426 cpp_opts
->warn_num_sign_change
= value
;
427 cpp_opts
->warn_multichar
= value
; /* Was C++ only. */
429 if (warn_pointer_sign
== -1)
430 warn_pointer_sign
= 1;
435 cpp_opts
->warn_comments
= value
;
438 case OPT_Wdeprecated
:
439 cpp_opts
->warn_deprecated
= value
;
442 case OPT_Wendif_labels
:
443 cpp_opts
->warn_endif_labels
= value
;
447 cpp_opts
->warnings_are_errors
= value
;
448 global_dc
->warning_as_error_requested
= value
;
451 case OPT_Werror_implicit_function_declaration
:
452 mesg_implicit_function_declaration
= 2;
460 set_Wformat (atoi (arg
));
464 set_Wimplicit (value
);
468 /* Silently ignore for now. */
471 case OPT_Winvalid_pch
:
472 cpp_opts
->warn_invalid_pch
= value
;
482 case OPT_Wmissing_include_dirs
:
483 cpp_opts
->warn_missing_include_dirs
= value
;
487 cpp_opts
->warn_multichar
= value
;
490 case OPT_Wnormalized_
:
491 if (!value
|| (arg
&& strcasecmp (arg
, "none") == 0))
492 cpp_opts
->warn_normalize
= normalized_none
;
493 else if (!arg
|| strcasecmp (arg
, "nfkc") == 0)
494 cpp_opts
->warn_normalize
= normalized_KC
;
495 else if (strcasecmp (arg
, "id") == 0)
496 cpp_opts
->warn_normalize
= normalized_identifier_C
;
497 else if (strcasecmp (arg
, "nfc") == 0)
498 cpp_opts
->warn_normalize
= normalized_C
;
500 error ("argument %qs to %<-Wnormalized%> not recognized", arg
);
503 case OPT_Wreturn_type
:
504 warn_return_type
= value
;
507 case OPT_Wstrict_null_sentinel
:
508 warn_strict_null_sentinel
= value
;
511 case OPT_Wsystem_headers
:
512 cpp_opts
->warn_system_headers
= value
;
515 case OPT_Wtraditional
:
516 cpp_opts
->warn_traditional
= value
;
520 cpp_opts
->warn_trigraphs
= value
;
524 cpp_opts
->warn_undef
= value
;
527 case OPT_Wunknown_pragmas
:
528 /* Set to greater than 1, so that even unknown pragmas in
529 system headers will be warned about. */
530 warn_unknown_pragmas
= value
* 2;
533 case OPT_Wunused_macros
:
534 warn_unused_macros
= value
;
537 case OPT_Wvariadic_macros
:
538 warn_variadic_macros
= value
;
541 case OPT_Wwrite_strings
:
542 warn_write_strings
= value
;
548 warn_nonvdtor
= true;
552 if (!c_dialect_cxx ())
553 set_std_c89 (false, true);
555 set_std_cxx98 (true);
562 case OPT_fcond_mismatch
:
563 if (!c_dialect_cxx ())
565 flag_cond_mismatch
= value
;
570 case OPT_fall_virtual
:
571 case OPT_falt_external_templates
:
572 case OPT_fenum_int_equiv
:
573 case OPT_fexternal_templates
:
574 case OPT_fguiding_decls
:
576 case OPT_fhuge_objects
:
578 case OPT_fname_mangling_version_
:
580 case OPT_fnonnull_objects
:
582 case OPT_fstrict_prototype
:
583 case OPT_fthis_is_variable
:
584 case OPT_fvtable_thunks
:
587 warning (0, "switch %qs is no longer supported", option
->opt_text
);
590 case OPT_faccess_control
:
591 flag_access_control
= value
;
595 flag_no_asm
= !value
;
599 flag_no_builtin
= !value
;
606 disable_builtin_function (arg
);
609 case OPT_fdollars_in_identifiers
:
610 cpp_opts
->dollars_in_ident
= value
;
613 case OPT_ffreestanding
:
615 /* Fall through.... */
618 flag_no_builtin
= !value
;
619 /* warn_main will be 2 if set by -Wall, 1 if set by -Wmain */
620 if (!value
&& warn_main
== 2)
624 case OPT_fshort_double
:
625 flag_short_double
= value
;
628 case OPT_fshort_enums
:
629 flag_short_enums
= value
;
632 case OPT_fshort_wchar
:
633 flag_short_wchar
= value
;
636 case OPT_fsigned_bitfields
:
637 flag_signed_bitfields
= value
;
640 case OPT_fsigned_char
:
641 flag_signed_char
= value
;
644 case OPT_funsigned_bitfields
:
645 flag_signed_bitfields
= !value
;
648 case OPT_funsigned_char
:
649 flag_signed_char
= !value
;
653 flag_check_new
= value
;
656 case OPT_fconserve_space
:
657 flag_conserve_space
= value
;
660 case OPT_fconstant_string_class_
:
661 constant_string_class_name
= arg
;
664 case OPT_fdefault_inline
:
665 flag_default_inline
= value
;
668 case OPT_felide_constructors
:
669 flag_elide_constructors
= value
;
672 case OPT_fenforce_eh_specs
:
673 flag_enforce_eh_specs
= value
;
676 case OPT_fextended_identifiers
:
677 cpp_opts
->extended_identifiers
= value
;
681 flag_new_for_scope
= value
;
684 case OPT_fgnu_keywords
:
685 flag_no_gnu_keywords
= !value
;
688 case OPT_fgnu_runtime
:
689 flag_next_runtime
= !value
;
692 case OPT_fhandle_exceptions
:
693 warning (0, "-fhandle-exceptions has been renamed -fexceptions (and is now on by default)");
694 flag_exceptions
= value
;
697 case OPT_fimplement_inlines
:
698 flag_implement_inlines
= value
;
701 case OPT_fimplicit_inline_templates
:
702 flag_implicit_inline_templates
= value
;
705 case OPT_fimplicit_templates
:
706 flag_implicit_templates
= value
;
709 case OPT_flax_vector_conversions
:
710 flag_lax_vector_conversions
= value
;
713 case OPT_fms_extensions
:
714 flag_ms_extensions
= value
;
717 case OPT_fnext_runtime
:
718 flag_next_runtime
= value
;
721 case OPT_fnil_receivers
:
722 flag_nil_receivers
= value
;
725 case OPT_fnonansi_builtins
:
726 flag_no_nonansi_builtin
= !value
;
729 case OPT_foperator_names
:
730 cpp_opts
->operator_names
= value
;
733 case OPT_foptional_diags
:
734 flag_optional_diags
= value
;
738 cpp_opts
->restore_pch_deps
= value
;
741 case OPT_fpch_preprocess
:
742 flag_pch_preprocess
= value
;
745 case OPT_fpermissive
:
746 flag_permissive
= value
;
749 case OPT_fpreprocessed
:
750 cpp_opts
->preprocessed
= value
;
753 case OPT_freplace_objc_classes
:
754 flag_replace_objc_classes
= value
;
758 flag_use_repository
= value
;
760 flag_implicit_templates
= 0;
767 case OPT_fshow_column
:
768 cpp_opts
->show_column
= value
;
772 flag_detailed_statistics
= value
;
776 /* It is documented that we silently ignore silly values. */
777 if (value
>= 1 && value
<= 100)
778 cpp_opts
->tabstop
= value
;
781 case OPT_fexec_charset_
:
782 cpp_opts
->narrow_charset
= arg
;
785 case OPT_fwide_exec_charset_
:
786 cpp_opts
->wide_charset
= arg
;
789 case OPT_finput_charset_
:
790 cpp_opts
->input_charset
= arg
;
793 case OPT_ftemplate_depth_
:
794 max_tinst_depth
= value
;
797 case OPT_fuse_cxa_atexit
:
798 flag_use_cxa_atexit
= value
;
801 case OPT_fuse_cxa_get_exception_ptr
:
802 flag_use_cxa_get_exception_ptr
= value
;
805 case OPT_fvisibility_inlines_hidden
:
806 visibility_options
.inlines_hidden
= value
;
813 case OPT_fthreadsafe_statics
:
814 flag_threadsafe_statics
= value
;
818 flag_zero_link
= value
;
822 flag_gen_declaration
= 1;
826 add_path (xstrdup (arg
), AFTER
, 0, true);
831 defer_opt (code
, arg
);
843 add_path (xstrdup (arg
), QUOTE
, 0, true);
851 add_path (xstrdup (arg
), SYSTEM
, 0, true);
854 case OPT_iwithprefix
:
855 add_prefixed_path (arg
, SYSTEM
);
858 case OPT_iwithprefixbefore
:
859 add_prefixed_path (arg
, BRACKET
);
863 cpp_set_lang (parse_in
, CLK_ASM
);
864 cpp_opts
->dollars_in_ident
= false;
867 case OPT_lang_fortran
:
887 error ("output filename specified twice");
890 /* We need to handle the -pedantic switches here, rather than in
891 c_common_post_options, so that a subsequent -Wno-endif-labels
892 is not overridden. */
893 case OPT_pedantic_errors
:
894 cpp_opts
->pedantic_errors
= 1;
897 cpp_opts
->pedantic
= 1;
898 cpp_opts
->warn_endif_labels
= 1;
899 if (warn_pointer_sign
== -1)
900 warn_pointer_sign
= 1;
901 if (warn_overlength_strings
== -1)
902 warn_overlength_strings
= 1;
905 case OPT_print_objc_runtime_info
:
906 print_struct_values
= 1;
909 case OPT_print_pch_checksum
:
910 c_common_print_pch_checksum (stdout
);
911 exit_after_options
= true;
919 case OPT_std_gnu__98
:
920 if (!preprocessing_asm_p
)
921 set_std_cxx98 (code
== OPT_std_c__98
/* ISO */);
925 case OPT_std_gnu__0x
:
926 if (!preprocessing_asm_p
)
927 set_std_cxx0x (code
== OPT_std_c__0x
/* ISO */);
931 case OPT_std_iso9899_1990
:
932 case OPT_std_iso9899_199409
:
933 if (!preprocessing_asm_p
)
934 set_std_c89 (code
== OPT_std_iso9899_199409
/* c94 */, true /* ISO */);
938 if (!preprocessing_asm_p
)
939 set_std_c89 (false /* c94 */, false /* ISO */);
944 case OPT_std_iso9899_1999
:
945 case OPT_std_iso9899_199x
:
946 if (!preprocessing_asm_p
)
947 set_std_c99 (true /* ISO */);
952 if (!preprocessing_asm_p
)
953 set_std_c99 (false /* ISO */);
957 cpp_opts
->trigraphs
= 1;
960 case OPT_traditional_cpp
:
961 cpp_opts
->traditional
= 1;
969 cpp_opts
->inhibit_warnings
= 1;
980 /* Post-switch processing. */
982 c_common_post_options (const char **pfilename
)
984 struct cpp_callbacks
*cb
;
986 /* Canonicalize the input and output filenames. */
987 if (in_fnames
== NULL
)
989 in_fnames
= XNEWVEC (const char *, 1);
992 else if (strcmp (in_fnames
[0], "-") == 0)
995 if (out_fname
== NULL
|| !strcmp (out_fname
, "-"))
998 if (cpp_opts
->deps
.style
== DEPS_NONE
)
999 check_deps_environment_vars ();
1001 handle_deferred_opts ();
1003 sanitize_cpp_opts ();
1005 register_include_chains (parse_in
, sysroot
, iprefix
, imultilib
,
1006 std_inc
, std_cxx_inc
&& c_dialect_cxx (), verbose
);
1008 #ifdef C_COMMON_OVERRIDE_OPTIONS
1009 /* Some machines may reject certain combinations of C
1010 language-specific options. */
1011 C_COMMON_OVERRIDE_OPTIONS
;
1014 flag_inline_trees
= 1;
1016 /* Use tree inlining. */
1017 if (!flag_no_inline
)
1019 if (flag_inline_functions
)
1020 flag_inline_trees
= 2;
1022 /* If we are given more than one input file, we must use
1023 unit-at-a-time mode. */
1024 if (num_in_fnames
> 1)
1025 flag_unit_at_a_time
= 1;
1027 /* Default to ObjC sjlj exception handling if NeXT runtime. */
1028 if (flag_objc_sjlj_exceptions
< 0)
1029 flag_objc_sjlj_exceptions
= flag_next_runtime
;
1030 if (flag_objc_exceptions
&& !flag_objc_sjlj_exceptions
)
1031 flag_exceptions
= 1;
1033 /* -Wextra implies -Wclobbered, -Wempty-body, -Wsign-compare,
1034 -Wmissing-field-initializers, -Wmissing-parameter-type
1035 -Wold-style-declaration, and -Woverride-init,
1036 but not if explicitly overridden. */
1037 if (warn_clobbered
== -1)
1038 warn_clobbered
= extra_warnings
;
1039 if (warn_empty_body
== -1)
1040 warn_empty_body
= extra_warnings
;
1041 if (warn_sign_compare
== -1)
1042 warn_sign_compare
= extra_warnings
;
1043 if (warn_missing_field_initializers
== -1)
1044 warn_missing_field_initializers
= extra_warnings
;
1045 if (warn_missing_parameter_type
== -1)
1046 warn_missing_parameter_type
= extra_warnings
;
1047 if (warn_old_style_declaration
== -1)
1048 warn_old_style_declaration
= extra_warnings
;
1049 if (warn_override_init
== -1)
1050 warn_override_init
= extra_warnings
;
1052 /* -Wpointer_sign is disabled by default, but it is enabled if any
1053 of -Wall or -pedantic are given. */
1054 if (warn_pointer_sign
== -1)
1055 warn_pointer_sign
= 0;
1057 /* -Woverlength-strings is off by default, but is enabled by -pedantic.
1058 It is never enabled in C++, as the minimum limit is not normative
1059 in that standard. */
1060 if (warn_overlength_strings
== -1 || c_dialect_cxx ())
1061 warn_overlength_strings
= 0;
1063 /* Special format checking options don't work without -Wformat; warn if
1067 warning (OPT_Wformat_y2k
,
1068 "-Wformat-y2k ignored without -Wformat");
1069 warning (OPT_Wformat_extra_args
,
1070 "-Wformat-extra-args ignored without -Wformat");
1071 warning (OPT_Wformat_zero_length
,
1072 "-Wformat-zero-length ignored without -Wformat");
1073 warning (OPT_Wformat_nonliteral
,
1074 "-Wformat-nonliteral ignored without -Wformat");
1075 warning (OPT_Wformat_security
,
1076 "-Wformat-security ignored without -Wformat");
1079 /* C99 requires special handling of complex multiplication and division;
1080 -ffast-math and -fcx-limited-range are handled in process_options. */
1082 flag_complex_method
= 2;
1084 if (flag_preprocess_only
)
1086 /* Open the output now. We must do so even if flag_no_output is
1087 on, because there may be other output than from the actual
1088 preprocessing (e.g. from -dM). */
1089 if (out_fname
[0] == '\0')
1090 out_stream
= stdout
;
1092 out_stream
= fopen (out_fname
, "w");
1094 if (out_stream
== NULL
)
1096 fatal_error ("opening output file %s: %m", out_fname
);
1100 if (num_in_fnames
> 1)
1101 error ("too many filenames given. Type %s --help for usage",
1104 init_pp_output (out_stream
);
1110 /* Yuk. WTF is this? I do know ObjC relies on it somewhere. */
1111 input_location
= UNKNOWN_LOCATION
;
1114 cb
= cpp_get_callbacks (parse_in
);
1115 cb
->file_change
= cb_file_change
;
1116 cb
->dir_change
= cb_dir_change
;
1117 cpp_post_options (parse_in
);
1119 input_location
= UNKNOWN_LOCATION
;
1121 /* If an error has occurred in cpplib, note it so we fail
1123 errorcount
+= cpp_errors (parse_in
);
1125 *pfilename
= this_input_filename
1126 = cpp_read_main_file (parse_in
, in_fnames
[0]);
1127 /* Don't do any compilation or preprocessing if there is no input file. */
1128 if (this_input_filename
== NULL
)
1134 if (flag_working_directory
1135 && flag_preprocess_only
&& !flag_no_line_commands
)
1136 pp_dir_change (parse_in
, get_src_pwd ());
1138 return flag_preprocess_only
;
1141 /* Front end initialization common to C, ObjC and C++. */
1143 c_common_init (void)
1145 /* Set up preprocessor arithmetic. Must be done after call to
1146 c_common_nodes_and_builtins for type nodes to be good. */
1147 cpp_opts
->precision
= TYPE_PRECISION (intmax_type_node
);
1148 cpp_opts
->char_precision
= TYPE_PRECISION (char_type_node
);
1149 cpp_opts
->int_precision
= TYPE_PRECISION (integer_type_node
);
1150 cpp_opts
->wchar_precision
= TYPE_PRECISION (wchar_type_node
);
1151 cpp_opts
->unsigned_wchar
= TYPE_UNSIGNED (wchar_type_node
);
1152 cpp_opts
->bytes_big_endian
= BYTES_BIG_ENDIAN
;
1154 /* This can't happen until after wchar_precision and bytes_big_endian
1156 cpp_init_iconv (parse_in
);
1159 c_common_print_pch_checksum (stderr
);
1161 if (flag_preprocess_only
)
1164 preprocess_file (parse_in
);
1168 /* Has to wait until now so that cpplib has its hash table. */
1174 /* Initialize the integrated preprocessor after debug output has been
1175 initialized; loop over each input file. */
1177 c_common_parse_file (int set_yydebug
)
1185 warning(0, "The C parser does not support -dy, option ignored");
1189 "The Objective-C parser does not support -dy, option ignored");
1192 warning(0, "The C++ parser does not support -dy, option ignored");
1196 "The Objective-C++ parser does not support -dy, option ignored");
1205 /* Start the main input file, if the debug writer wants it. */
1206 if (debug_hooks
->start_end_main_source_file
)
1207 (*debug_hooks
->start_source_file
) (0, this_input_filename
);
1214 /* And end the main input file, if the debug writer wants it */
1215 if (debug_hooks
->start_end_main_source_file
)
1216 (*debug_hooks
->end_source_file
) (0);
1217 if (++i
>= num_in_fnames
)
1219 cpp_undef_all (parse_in
);
1221 = cpp_read_main_file (parse_in
, in_fnames
[i
]);
1222 /* If an input file is missing, abandon further compilation.
1223 cpplib has issued a diagnostic. */
1224 if (!this_input_filename
)
1229 /* Common finish hook for the C, ObjC and C++ front ends. */
1231 c_common_finish (void)
1233 FILE *deps_stream
= NULL
;
1235 if (cpp_opts
->deps
.style
!= DEPS_NONE
)
1237 /* If -M or -MM was seen without -MF, default output to the
1240 deps_stream
= out_stream
;
1243 deps_stream
= fopen (deps_file
, deps_append
? "a": "w");
1245 fatal_error ("opening dependency file %s: %m", deps_file
);
1249 /* For performance, avoid tearing down cpplib's internal structures
1250 with cpp_destroy (). */
1251 errorcount
+= cpp_finish (parse_in
, deps_stream
);
1253 if (deps_stream
&& deps_stream
!= out_stream
1254 && (ferror (deps_stream
) || fclose (deps_stream
)))
1255 fatal_error ("closing dependency file %s: %m", deps_file
);
1257 if (out_stream
&& (ferror (out_stream
) || fclose (out_stream
)))
1258 fatal_error ("when writing output to %s: %m", out_fname
);
1261 /* Either of two environment variables can specify output of
1262 dependencies. Their value is either "OUTPUT_FILE" or "OUTPUT_FILE
1263 DEPS_TARGET", where OUTPUT_FILE is the file to write deps info to
1264 and DEPS_TARGET is the target to mention in the deps. They also
1265 result in dependency information being appended to the output file
1266 rather than overwriting it, and like Sun's compiler
1267 SUNPRO_DEPENDENCIES suppresses the dependency on the main file. */
1269 check_deps_environment_vars (void)
1273 GET_ENVIRONMENT (spec
, "DEPENDENCIES_OUTPUT");
1275 cpp_opts
->deps
.style
= DEPS_USER
;
1278 GET_ENVIRONMENT (spec
, "SUNPRO_DEPENDENCIES");
1281 cpp_opts
->deps
.style
= DEPS_SYSTEM
;
1282 cpp_opts
->deps
.ignore_main_file
= true;
1288 /* Find the space before the DEPS_TARGET, if there is one. */
1289 char *s
= strchr (spec
, ' ');
1292 /* Let the caller perform MAKE quoting. */
1293 defer_opt (OPT_MT
, s
+ 1);
1297 /* Command line -MF overrides environment variables and default. */
1306 /* Handle deferred command line switches. */
1308 handle_deferred_opts (void)
1313 /* Avoid allocating the deps buffer if we don't need it.
1314 (This flag may be true without there having been -MT or -MQ
1315 options, but we'll still need the deps buffer.) */
1319 deps
= cpp_get_deps (parse_in
);
1321 for (i
= 0; i
< deferred_count
; i
++)
1323 struct deferred_opt
*opt
= &deferred_opts
[i
];
1325 if (opt
->code
== OPT_MT
|| opt
->code
== OPT_MQ
)
1326 deps_add_target (deps
, opt
->arg
, opt
->code
== OPT_MQ
);
1330 /* These settings are appropriate for GCC, but not necessarily so for
1331 cpplib as a library. */
1333 sanitize_cpp_opts (void)
1335 /* If we don't know what style of dependencies to output, complain
1336 if any other dependency switches have been given. */
1337 if (deps_seen
&& cpp_opts
->deps
.style
== DEPS_NONE
)
1338 error ("to generate dependencies you must specify either -M or -MM");
1340 /* -dM and dependencies suppress normal output; do it here so that
1341 the last -d[MDN] switch overrides earlier ones. */
1342 if (flag_dump_macros
== 'M')
1345 /* Disable -dD, -dN and -dI if normal output is suppressed. Allow
1346 -dM since at least glibc relies on -M -dM to work. */
1347 /* Also, flag_no_output implies flag_no_line_commands, always. */
1350 if (flag_dump_macros
!= 'M')
1351 flag_dump_macros
= 0;
1352 flag_dump_includes
= 0;
1353 flag_no_line_commands
= 1;
1356 cpp_opts
->unsigned_char
= !flag_signed_char
;
1357 cpp_opts
->stdc_0_in_system_headers
= STDC_0_IN_SYSTEM_HEADERS
;
1359 /* We want -Wno-long-long to override -pedantic -std=non-c99
1360 and/or -Wtraditional, whatever the ordering. */
1361 cpp_opts
->warn_long_long
1362 = warn_long_long
&& ((!flag_isoc99
&& pedantic
) || warn_traditional
);
1364 /* Similarly with -Wno-variadic-macros. No check for c99 here, since
1365 this also turns off warnings about GCCs extension. */
1366 cpp_opts
->warn_variadic_macros
1367 = warn_variadic_macros
&& (pedantic
|| warn_traditional
);
1369 /* If we're generating preprocessor output, emit current directory
1370 if explicitly requested or if debugging information is enabled.
1371 ??? Maybe we should only do it for debugging formats that
1372 actually output the current directory? */
1373 if (flag_working_directory
== -1)
1374 flag_working_directory
= (debug_info_level
!= DINFO_LEVEL_NONE
);
1377 /* Add include path with a prefix at the front of its name. */
1379 add_prefixed_path (const char *suffix
, size_t chain
)
1383 size_t prefix_len
, suffix_len
;
1385 suffix_len
= strlen (suffix
);
1386 prefix
= iprefix
? iprefix
: cpp_GCC_INCLUDE_DIR
;
1387 prefix_len
= iprefix
? strlen (iprefix
) : cpp_GCC_INCLUDE_DIR_len
;
1389 path
= (char *) xmalloc (prefix_len
+ suffix_len
+ 1);
1390 memcpy (path
, prefix
, prefix_len
);
1391 memcpy (path
+ prefix_len
, suffix
, suffix_len
);
1392 path
[prefix_len
+ suffix_len
] = '\0';
1394 add_path (path
, chain
, 0, false);
1397 /* Handle -D, -U, -A, -imacros, and the first -include. */
1399 finish_options (void)
1401 if (!cpp_opts
->preprocessed
)
1405 cb_file_change (parse_in
,
1406 linemap_add (&line_table
, LC_RENAME
, 0,
1407 _("<built-in>"), 0));
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
->pedantic
&& !cpp_opts
->c99
);
1423 cb_file_change (parse_in
,
1424 linemap_add (&line_table
, LC_RENAME
, 0,
1425 _("<command-line>"), 0));
1427 for (i
= 0; i
< deferred_count
; i
++)
1429 struct deferred_opt
*opt
= &deferred_opts
[i
];
1431 if (opt
->code
== OPT_D
)
1432 cpp_define (parse_in
, opt
->arg
);
1433 else if (opt
->code
== OPT_U
)
1434 cpp_undef (parse_in
, opt
->arg
);
1435 else if (opt
->code
== OPT_A
)
1437 if (opt
->arg
[0] == '-')
1438 cpp_unassert (parse_in
, opt
->arg
+ 1);
1440 cpp_assert (parse_in
, opt
->arg
);
1444 /* Handle -imacros after -D and -U. */
1445 for (i
= 0; i
< deferred_count
; i
++)
1447 struct deferred_opt
*opt
= &deferred_opts
[i
];
1449 if (opt
->code
== OPT_imacros
1450 && cpp_push_include (parse_in
, opt
->arg
))
1452 /* Disable push_command_line_include callback for now. */
1453 include_cursor
= deferred_count
+ 1;
1454 cpp_scan_nooutput (parse_in
);
1460 push_command_line_include ();
1463 /* Give CPP the next file given by -include, if any. */
1465 push_command_line_include (void)
1467 while (include_cursor
< deferred_count
)
1469 struct deferred_opt
*opt
= &deferred_opts
[include_cursor
++];
1471 if (!cpp_opts
->preprocessed
&& opt
->code
== OPT_include
1472 && cpp_push_include (parse_in
, opt
->arg
))
1476 if (include_cursor
== deferred_count
)
1479 /* -Wunused-macros should only warn about macros defined hereafter. */
1480 cpp_opts
->warn_unused_macros
= warn_unused_macros
;
1481 /* Restore the line map from <command line>. */
1482 if (!cpp_opts
->preprocessed
)
1483 cpp_change_file (parse_in
, LC_RENAME
, this_input_filename
);
1485 /* Set this here so the client can change the option if it wishes,
1486 and after stacking the main file so we don't trace the main file. */
1487 line_table
.trace_includes
= cpp_opts
->print_include_names
;
1491 /* File change callback. Has to handle -include files. */
1493 cb_file_change (cpp_reader
* ARG_UNUSED (pfile
),
1494 const struct line_map
*new_map
)
1496 if (flag_preprocess_only
)
1497 pp_file_change (new_map
);
1499 fe_file_change (new_map
);
1501 if (new_map
== 0 || (new_map
->reason
== LC_LEAVE
&& MAIN_FILE_P (new_map
)))
1502 push_command_line_include ();
1506 cb_dir_change (cpp_reader
* ARG_UNUSED (pfile
), const char *dir
)
1508 if (!set_src_pwd (dir
))
1509 warning (0, "too late for # directive to set debug directory");
1512 /* Set the C 89 standard (with 1994 amendments if C94, without GNU
1513 extensions if ISO). There is no concept of gnu94. */
1515 set_std_c89 (int c94
, int iso
)
1517 cpp_set_lang (parse_in
, c94
? CLK_STDC94
: iso
? CLK_STDC89
: CLK_GNUC89
);
1520 flag_no_gnu_keywords
= iso
;
1521 flag_no_nonansi_builtin
= iso
;
1526 /* Set the C 99 standard (without GNU extensions if ISO). */
1528 set_std_c99 (int iso
)
1530 cpp_set_lang (parse_in
, iso
? CLK_STDC99
: CLK_GNUC99
);
1532 flag_no_nonansi_builtin
= iso
;
1538 /* Set the C++ 98 standard (without GNU extensions if ISO). */
1540 set_std_cxx98 (int iso
)
1542 cpp_set_lang (parse_in
, iso
? CLK_CXX98
: CLK_GNUCXX
);
1543 flag_no_gnu_keywords
= iso
;
1544 flag_no_nonansi_builtin
= iso
;
1548 /* Set the C++ 0x working draft "standard" (without GNU extensions if ISO). */
1550 set_std_cxx0x (int iso
)
1552 cpp_set_lang (parse_in
, iso
? CLK_CXX0X
: CLK_GNUCXX0X
);
1553 flag_no_gnu_keywords
= iso
;
1554 flag_no_nonansi_builtin
= iso
;
1559 /* Handle setting implicit to ON. */
1561 set_Wimplicit (int on
)
1564 warn_implicit_int
= on
;
1567 if (mesg_implicit_function_declaration
!= 2)
1568 mesg_implicit_function_declaration
= 1;
1571 mesg_implicit_function_declaration
= 0;
1574 /* Args to -d specify what to dump. Silently ignore
1575 unrecognized options; they may be aimed at toplev.c. */
1577 handle_OPT_d (const char *arg
)
1581 while ((c
= *arg
++) != '\0')
1584 case 'M': /* Dump macros only. */
1585 case 'N': /* Dump names. */
1586 case 'D': /* Dump definitions. */
1587 flag_dump_macros
= c
;
1591 flag_dump_includes
= 1;