1 /* C/ObjC/C++ command line option handling.
2 Copyright (C) 2002, 2003 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, 59 Temple Place - Suite 330, 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. */
41 #ifndef DOLLARS_IN_IDENTIFIERS
42 # define DOLLARS_IN_IDENTIFIERS true
45 #ifndef TARGET_SYSTEM_ROOT
46 # define TARGET_SYSTEM_ROOT NULL
49 static int saved_lineno
;
52 static cpp_options
*cpp_opts
;
55 static const char *this_input_filename
;
57 /* Filename and stream for preprocessed output. */
58 static const char *out_fname
;
59 static FILE *out_stream
;
61 /* Append dependencies to deps_file. */
62 static bool deps_append
;
64 /* If dependency switches (-MF etc.) have been given. */
65 static bool deps_seen
;
70 /* Dependency output file. */
71 static const char *deps_file
;
73 /* The prefix given by -iprefix, if any. */
74 static const char *iprefix
;
76 /* The system root, if any. Overridden by -isysroot. */
77 static const char *sysroot
= TARGET_SYSTEM_ROOT
;
79 /* Zero disables all standard directories for headers. */
80 static bool std_inc
= true;
82 /* Zero disables the C++-specific standard directories for headers. */
83 static bool std_cxx_inc
= true;
85 /* If the quote chain has been split by -I-. */
86 static bool quote_chain_split
;
88 /* If -Wunused-macros. */
89 static bool warn_unused_macros
;
91 /* Number of deferred options. */
92 static size_t deferred_count
;
94 /* Number of deferred options scanned for -include. */
95 static size_t include_cursor
;
97 /* Permit Fotran front-end options. */
98 static bool permit_fortran_options
;
100 static void set_Wimplicit (int);
101 static void handle_OPT_d (const char *);
102 static void set_std_cxx98 (int);
103 static void set_std_c89 (int, int);
104 static void set_std_c99 (int);
105 static void check_deps_environment_vars (void);
106 static void handle_deferred_opts (void);
107 static void sanitize_cpp_opts (void);
108 static void add_prefixed_path (const char *, size_t);
109 static void push_command_line_include (void);
110 static void cb_file_change (cpp_reader
*, const struct line_map
*);
111 static void finish_options (const char *);
113 #ifndef STDC_0_IN_SYSTEM_HEADERS
114 #define STDC_0_IN_SYSTEM_HEADERS 0
117 /* Holds switches parsed by c_common_handle_option (), but whose
118 handling is deferred to c_common_post_options (). */
119 static void defer_opt (enum opt_code
, const char *);
120 static struct deferred_opt
126 /* Complain that switch CODE expects an argument but none was
127 provided. OPT was the command-line option. Return FALSE to get
128 the default message in opts.c, TRUE if we provide a specialized
131 c_common_missing_argument (const char *opt
, size_t code
)
136 /* Pick up the default message. */
139 case OPT_fconstant_string_class_
:
140 error ("no class name specified with \"%s\"", opt
);
144 error ("assertion missing after \"%s\"", opt
);
149 error ("macro name missing after \"%s\"", opt
);
156 error ("missing path after \"%s\"", opt
);
165 error ("missing filename after \"%s\"", opt
);
170 error ("missing makefile target after \"%s\"", opt
);
177 /* Defer option CODE with argument ARG. */
179 defer_opt (enum opt_code code
, const char *arg
)
181 deferred_opts
[deferred_count
].code
= code
;
182 deferred_opts
[deferred_count
].arg
= arg
;
186 /* Common initialization before parsing options. */
188 c_common_init_options (unsigned int argc
, const char **argv ATTRIBUTE_UNUSED
)
190 static const unsigned int lang_flags
[] = {CL_C
, CL_ObjC
, CL_CXX
, CL_ObjCXX
};
193 /* This is conditionalized only because that is the way the front
194 ends used to do it. Maybe this should be unconditional? */
195 if (c_dialect_cxx ())
197 /* By default wrap lines at 80 characters. Is getenv
198 ("COLUMNS") preferable? */
199 diagnostic_line_cutoff (global_dc
) = 80;
200 /* By default, emit location information once for every
201 diagnostic message. */
202 diagnostic_prefixing_rule (global_dc
) = DIAGNOSTICS_SHOW_PREFIX_ONCE
;
205 parse_in
= cpp_create_reader (c_dialect_cxx () ? CLK_GNUCXX
: CLK_GNUC89
,
208 cpp_opts
= cpp_get_options (parse_in
);
209 cpp_opts
->dollars_in_ident
= DOLLARS_IN_IDENTIFIERS
;
210 cpp_opts
->objc
= c_dialect_objc ();
212 /* Reset to avoid warnings on internal definitions. We set it just
213 before passing on command-line options to cpplib. */
214 cpp_opts
->warn_dollars
= 0;
216 flag_const_strings
= c_dialect_cxx ();
217 flag_exceptions
= c_dialect_cxx ();
218 warn_pointer_arith
= c_dialect_cxx ();
220 deferred_opts
= xmalloc (argc
* sizeof (struct deferred_opt
));
222 result
= lang_flags
[c_language
];
224 /* If potentially preprocessing Fortran we have to accept its front
225 end options since the driver passes most of them through. */
227 if (c_language
== clk_c
&& argc
> 2
228 && !strcmp (argv
[2], "-traditional-cpp" ))
230 permit_fortran_options
= true;
238 /* Handle switch SCODE with argument ARG. VALUE is true, unless no-
239 form of an -f or -W option was given. Returns 0 if the switch was
240 invalid, a negative number to prevent language-independent
241 processing in toplev.c (a hack necessary for the short-term). */
243 c_common_handle_option (size_t scode
, const char *arg
, int value
)
245 const struct cl_option
*option
= &cl_options
[scode
];
246 enum opt_code code
= (enum opt_code
) scode
;
252 result
= permit_fortran_options
;
255 case OPT__output_pch_
:
260 defer_opt (code
, arg
);
264 cpp_opts
->discard_comments
= 0;
268 cpp_opts
->discard_comments
= 0;
269 cpp_opts
->discard_comments_in_macro_exp
= 0;
273 defer_opt (code
, arg
);
277 flag_preprocess_only
= 1;
281 cpp_opts
->print_include_names
= 1;
285 if (strcmp (arg
, "-"))
286 add_path (xstrdup (arg
), BRACKET
, 0);
289 if (quote_chain_split
)
290 error ("-I- specified twice");
291 quote_chain_split
= true;
292 split_quote_chain ();
298 /* When doing dependencies with -M or -MM, suppress normal
299 preprocessed output, but still do -dM etc. as software
300 depends on this. Preprocessed output does occur if -MD, -MMD
301 or environment var dependency generation is used. */
302 cpp_opts
->deps
.style
= (code
== OPT_M
? DEPS_SYSTEM
: DEPS_USER
);
304 cpp_opts
->inhibit_warnings
= 1;
309 cpp_opts
->deps
.style
= (code
== OPT_MD
? DEPS_SYSTEM
: DEPS_USER
);
320 cpp_opts
->deps
.missing_files
= true;
325 cpp_opts
->deps
.phony_targets
= true;
331 defer_opt (code
, arg
);
335 flag_no_line_commands
= 1;
338 case OPT_fworking_directory
:
339 flag_working_directory
= value
;
343 defer_opt (code
, arg
);
353 set_Wimplicit (value
);
354 warn_char_subscripts
= value
;
355 warn_missing_braces
= value
;
356 warn_parentheses
= value
;
357 warn_return_type
= value
;
358 warn_sequence_point
= value
; /* Was C only. */
359 if (c_dialect_cxx ())
360 warn_sign_compare
= value
;
362 warn_strict_aliasing
= value
;
364 /* Only warn about unknown pragmas that are not in system
366 warn_unknown_pragmas
= value
;
368 /* We save the value of warn_uninitialized, since if they put
369 -Wuninitialized on the command line, we need to generate a
370 warning about not using it without also specifying -O. */
371 if (warn_uninitialized
!= 1)
372 warn_uninitialized
= (value
? 2 : 0);
374 if (!c_dialect_cxx ())
375 /* We set this to 2 here, but 1 in -Wmain, so -ffreestanding
376 can turn it off only if it's not explicit. */
377 warn_main
= value
* 2;
380 /* C++-specific warnings. */
381 warn_nonvdtor
= value
;
382 warn_reorder
= value
;
383 warn_nontemplate_friend
= value
;
386 cpp_opts
->warn_trigraphs
= value
;
387 cpp_opts
->warn_comments
= value
;
388 cpp_opts
->warn_num_sign_change
= value
;
389 cpp_opts
->warn_multichar
= value
; /* Was C++ only. */
392 case OPT_Wbad_function_cast
:
393 warn_bad_function_cast
= value
;
397 warn_cast_qual
= value
;
400 case OPT_Wchar_subscripts
:
401 warn_char_subscripts
= value
;
406 cpp_opts
->warn_comments
= value
;
409 case OPT_Wconversion
:
410 warn_conversion
= value
;
413 case OPT_Wctor_dtor_privacy
:
414 warn_ctor_dtor_privacy
= value
;
417 case OPT_Wdeclaration_after_statement
:
418 warn_declaration_after_statement
= value
;
421 case OPT_Wdeprecated
:
422 warn_deprecated
= value
;
423 cpp_opts
->warn_deprecated
= value
;
426 case OPT_Wdiv_by_zero
:
427 warn_div_by_zero
= value
;
434 case OPT_Wendif_labels
:
435 cpp_opts
->warn_endif_labels
= value
;
439 cpp_opts
->warnings_are_errors
= value
;
442 case OPT_Werror_implicit_function_declaration
:
443 mesg_implicit_function_declaration
= 2;
446 case OPT_Wfloat_equal
:
447 warn_float_equal
= value
;
455 set_Wformat (atoi (arg
));
458 case OPT_Wformat_extra_args
:
459 warn_format_extra_args
= value
;
462 case OPT_Wformat_nonliteral
:
463 warn_format_nonliteral
= value
;
466 case OPT_Wformat_security
:
467 warn_format_security
= value
;
470 case OPT_Wformat_y2k
:
471 warn_format_y2k
= value
;
474 case OPT_Wformat_zero_length
:
475 warn_format_zero_length
= value
;
479 warn_init_self
= value
;
483 set_Wimplicit (value
);
486 case OPT_Wimplicit_function_declaration
:
487 mesg_implicit_function_declaration
= value
;
490 case OPT_Wimplicit_int
:
491 warn_implicit_int
= value
;
495 /* Silently ignore for now. */
498 case OPT_Winvalid_offsetof
:
499 warn_invalid_offsetof
= value
;
502 case OPT_Winvalid_pch
:
503 cpp_opts
->warn_invalid_pch
= value
;
507 warn_long_long
= value
;
517 case OPT_Wmissing_braces
:
518 warn_missing_braces
= value
;
521 case OPT_Wmissing_declarations
:
522 warn_missing_declarations
= value
;
525 case OPT_Wmissing_format_attribute
:
526 warn_missing_format_attribute
= value
;
529 case OPT_Wmissing_prototypes
:
530 warn_missing_prototypes
= value
;
534 cpp_opts
->warn_multichar
= value
;
537 case OPT_Wnested_externs
:
538 warn_nested_externs
= value
;
541 case OPT_Wnon_template_friend
:
542 warn_nontemplate_friend
= value
;
545 case OPT_Wnon_virtual_dtor
:
546 warn_nonvdtor
= value
;
550 warn_nonnull
= value
;
553 case OPT_Wold_style_definition
:
554 warn_old_style_definition
= value
;
557 case OPT_Wold_style_cast
:
558 warn_old_style_cast
= value
;
561 case OPT_Woverloaded_virtual
:
562 warn_overloaded_virtual
= value
;
565 case OPT_Wparentheses
:
566 warn_parentheses
= value
;
569 case OPT_Wpmf_conversions
:
570 warn_pmf2ptr
= value
;
573 case OPT_Wpointer_arith
:
574 warn_pointer_arith
= value
;
578 warn_protocol
= value
;
582 warn_selector
= value
;
585 case OPT_Wredundant_decls
:
586 warn_redundant_decls
= value
;
590 warn_reorder
= value
;
593 case OPT_Wreturn_type
:
594 warn_return_type
= value
;
597 case OPT_Wsequence_point
:
598 warn_sequence_point
= value
;
601 case OPT_Wsign_compare
:
602 warn_sign_compare
= value
;
605 case OPT_Wsign_promo
:
606 warn_sign_promo
= value
;
609 case OPT_Wstrict_prototypes
:
610 warn_strict_prototypes
= value
;
617 case OPT_Wsystem_headers
:
618 cpp_opts
->warn_system_headers
= value
;
621 case OPT_Wtraditional
:
622 warn_traditional
= value
;
623 cpp_opts
->warn_traditional
= value
;
627 cpp_opts
->warn_trigraphs
= value
;
630 case OPT_Wundeclared_selector
:
631 warn_undeclared_selector
= value
;
635 cpp_opts
->warn_undef
= value
;
638 case OPT_Wunknown_pragmas
:
639 /* Set to greater than 1, so that even unknown pragmas in
640 system headers will be warned about. */
641 warn_unknown_pragmas
= value
* 2;
644 case OPT_Wunused_macros
:
645 warn_unused_macros
= value
;
648 case OPT_Wwrite_strings
:
649 if (!c_dialect_cxx ())
650 flag_const_strings
= value
;
652 warn_write_strings
= value
;
656 if (!c_dialect_cxx ())
657 set_std_c89 (false, true);
659 set_std_cxx98 (true);
666 case OPT_fcond_mismatch
:
667 if (!c_dialect_cxx ())
669 flag_cond_mismatch
= value
;
674 case OPT_fall_virtual
:
675 case OPT_fenum_int_equiv
:
676 case OPT_fguiding_decls
:
678 case OPT_fhuge_objects
:
680 case OPT_fname_mangling_version_
:
682 case OPT_fnonnull_objects
:
684 case OPT_fstrict_prototype
:
685 case OPT_fthis_is_variable
:
686 case OPT_fvtable_thunks
:
689 warning ("switch \"%s\" is no longer supported", option
->opt_text
);
692 case OPT_fabi_version_
:
693 flag_abi_version
= value
;
696 case OPT_faccess_control
:
697 flag_access_control
= value
;
700 case OPT_falt_external_templates
:
701 flag_alt_external_templates
= value
;
703 flag_external_templates
= true;
705 warning ("switch \"%s\" is deprecated, please see documentation "
706 "for details", option
->opt_text
);
710 flag_no_asm
= !value
;
714 flag_no_builtin
= !value
;
721 disable_builtin_function (arg
);
724 case OPT_fdollars_in_identifiers
:
725 cpp_opts
->dollars_in_ident
= value
;
729 if (!dump_switch_p (arg
))
733 case OPT_ffreestanding
:
735 /* Fall through.... */
738 flag_no_builtin
= !value
;
739 /* warn_main will be 2 if set by -Wall, 1 if set by -Wmain */
740 if (!value
&& warn_main
== 2)
744 case OPT_fshort_double
:
745 flag_short_double
= value
;
748 case OPT_fshort_enums
:
749 flag_short_enums
= value
;
752 case OPT_fshort_wchar
:
753 flag_short_wchar
= value
;
756 case OPT_fsigned_bitfields
:
757 flag_signed_bitfields
= value
;
758 explicit_flag_signed_bitfields
= 1;
761 case OPT_fsigned_char
:
762 flag_signed_char
= value
;
765 case OPT_funsigned_bitfields
:
766 flag_signed_bitfields
= !value
;
767 explicit_flag_signed_bitfields
= 1;
770 case OPT_funsigned_char
:
771 flag_signed_char
= !value
;
775 flag_check_new
= value
;
778 case OPT_fconserve_space
:
779 flag_conserve_space
= value
;
782 case OPT_fconst_strings
:
783 flag_const_strings
= value
;
786 case OPT_fconstant_string_class_
:
787 constant_string_class_name
= arg
;
790 case OPT_fdefault_inline
:
791 flag_default_inline
= value
;
794 case OPT_felide_constructors
:
795 flag_elide_constructors
= value
;
798 case OPT_fenforce_eh_specs
:
799 flag_enforce_eh_specs
= value
;
802 case OPT_fexternal_templates
:
803 flag_external_templates
= value
;
806 case OPT_ffixed_form
:
807 case OPT_ffixed_line_length_
:
808 /* Fortran front end options ignored when preprocessing only. */
809 if (!flag_preprocess_only
)
814 flag_new_for_scope
= value
;
817 case OPT_fgnu_keywords
:
818 flag_no_gnu_keywords
= !value
;
821 case OPT_fgnu_runtime
:
822 flag_next_runtime
= !value
;
825 case OPT_fhandle_exceptions
:
826 warning ("-fhandle-exceptions has been renamed -fexceptions (and is now on by default)");
827 flag_exceptions
= value
;
830 case OPT_fimplement_inlines
:
831 flag_implement_inlines
= value
;
834 case OPT_fimplicit_inline_templates
:
835 flag_implicit_inline_templates
= value
;
838 case OPT_fimplicit_templates
:
839 flag_implicit_templates
= value
;
842 case OPT_fms_extensions
:
843 flag_ms_extensions
= value
;
846 case OPT_fnext_runtime
:
847 flag_next_runtime
= value
;
850 case OPT_fnonansi_builtins
:
851 flag_no_nonansi_builtin
= !value
;
854 case OPT_foperator_names
:
855 cpp_opts
->operator_names
= value
;
858 case OPT_foptional_diags
:
859 flag_optional_diags
= value
;
863 cpp_opts
->restore_pch_deps
= value
;
866 case OPT_fpermissive
:
867 flag_permissive
= value
;
870 case OPT_fpreprocessed
:
871 cpp_opts
->preprocessed
= value
;
875 flag_use_repository
= value
;
877 flag_implicit_templates
= 0;
884 case OPT_fshow_column
:
885 cpp_opts
->show_column
= value
;
889 flag_detailed_statistics
= value
;
893 /* It is documented that we silently ignore silly values. */
894 if (value
>= 1 && value
<= 100)
895 cpp_opts
->tabstop
= value
;
898 case OPT_fexec_charset_
:
899 cpp_opts
->narrow_charset
= arg
;
902 case OPT_fwide_exec_charset_
:
903 cpp_opts
->wide_charset
= arg
;
906 case OPT_ftemplate_depth_
:
907 max_tinst_depth
= value
;
910 case OPT_fuse_cxa_atexit
:
911 flag_use_cxa_atexit
= value
;
919 flag_gen_declaration
= 1;
923 add_path (xstrdup (arg
), AFTER
, 0);
928 defer_opt (code
, arg
);
940 add_path (xstrdup (arg
), SYSTEM
, 0);
943 case OPT_iwithprefix
:
944 add_prefixed_path (arg
, SYSTEM
);
947 case OPT_iwithprefixbefore
:
948 add_prefixed_path (arg
, BRACKET
);
952 cpp_set_lang (parse_in
, CLK_ASM
);
953 cpp_opts
->dollars_in_ident
= false;
972 error ("output filename specified twice");
975 /* We need to handle the -pedantic switches here, rather than in
976 c_common_post_options, so that a subsequent -Wno-endif-labels
977 is not overridden. */
978 case OPT_pedantic_errors
:
979 cpp_opts
->pedantic_errors
= 1;
982 cpp_opts
->pedantic
= 1;
983 cpp_opts
->warn_endif_labels
= 1;
986 case OPT_print_objc_runtime_info
:
987 print_struct_values
= 1;
995 case OPT_std_gnu__98
:
996 set_std_cxx98 (code
== OPT_std_c__98
/* ISO */);
1000 case OPT_std_iso9899_1990
:
1001 case OPT_std_iso9899_199409
:
1002 set_std_c89 (code
== OPT_std_iso9899_199409
/* c94 */, true /* ISO */);
1006 set_std_c89 (false /* c94 */, false /* ISO */);
1011 case OPT_std_iso9899_1999
:
1012 case OPT_std_iso9899_199x
:
1013 set_std_c99 (true /* ISO */);
1018 set_std_c99 (false /* ISO */);
1022 cpp_opts
->trigraphs
= 1;
1025 case OPT_traditional_cpp
:
1026 cpp_opts
->traditional
= 1;
1034 cpp_opts
->inhibit_warnings
= 1;
1045 /* Post-switch processing. */
1047 c_common_post_options (const char **pfilename
)
1049 /* Canonicalize the input and output filenames. */
1050 if (in_fnames
== NULL
)
1052 in_fnames
= xmalloc (sizeof (in_fnames
[0]));
1055 else if (strcmp (in_fnames
[0], "-") == 0)
1058 if (out_fname
== NULL
|| !strcmp (out_fname
, "-"))
1061 if (cpp_opts
->deps
.style
== DEPS_NONE
)
1062 check_deps_environment_vars ();
1064 handle_deferred_opts ();
1066 sanitize_cpp_opts ();
1068 register_include_chains (parse_in
, sysroot
, iprefix
,
1069 std_inc
, std_cxx_inc
&& c_dialect_cxx (), verbose
);
1071 flag_inline_trees
= 1;
1073 /* Use tree inlining if possible. Function instrumentation is only
1074 done in the RTL level, so we disable tree inlining. */
1075 if (! flag_instrument_function_entry_exit
)
1077 if (!flag_no_inline
)
1079 if (flag_inline_functions
)
1081 flag_inline_trees
= 2;
1082 flag_inline_functions
= 0;
1086 /* -Wextra implies -Wsign-compare, but not if explicitly
1088 if (warn_sign_compare
== -1)
1089 warn_sign_compare
= extra_warnings
;
1091 /* Special format checking options don't work without -Wformat; warn if
1093 if (warn_format_y2k
&& !warn_format
)
1094 warning ("-Wformat-y2k ignored without -Wformat");
1095 if (warn_format_extra_args
&& !warn_format
)
1096 warning ("-Wformat-extra-args ignored without -Wformat");
1097 if (warn_format_zero_length
&& !warn_format
)
1098 warning ("-Wformat-zero-length ignored without -Wformat");
1099 if (warn_format_nonliteral
&& !warn_format
)
1100 warning ("-Wformat-nonliteral ignored without -Wformat");
1101 if (warn_format_security
&& !warn_format
)
1102 warning ("-Wformat-security ignored without -Wformat");
1103 if (warn_missing_format_attribute
&& !warn_format
)
1104 warning ("-Wmissing-format-attribute ignored without -Wformat");
1106 if (flag_preprocess_only
)
1108 /* Open the output now. We must do so even if flag_no_output is
1109 on, because there may be other output than from the actual
1110 preprocessing (e.g. from -dM). */
1111 if (out_fname
[0] == '\0')
1112 out_stream
= stdout
;
1114 out_stream
= fopen (out_fname
, "w");
1116 if (out_stream
== NULL
)
1118 fatal_error ("opening output file %s: %m", out_fname
);
1122 if (num_in_fnames
> 1)
1123 error ("too many filenames given. Type %s --help for usage",
1126 init_pp_output (out_stream
);
1132 /* Yuk. WTF is this? I do know ObjC relies on it somewhere. */
1136 cpp_get_callbacks (parse_in
)->file_change
= cb_file_change
;
1137 cpp_post_options (parse_in
);
1139 /* NOTE: we use in_fname here, not the one supplied. */
1140 *pfilename
= cpp_read_main_file (parse_in
, in_fnames
[0]);
1142 saved_lineno
= input_line
;
1145 /* If an error has occurred in cpplib, note it so we fail
1147 errorcount
+= cpp_errors (parse_in
);
1149 return flag_preprocess_only
;
1152 /* Front end initialization common to C, ObjC and C++. */
1154 c_common_init (void)
1156 input_line
= saved_lineno
;
1158 /* Set up preprocessor arithmetic. Must be done after call to
1159 c_common_nodes_and_builtins for type nodes to be good. */
1160 cpp_opts
->precision
= TYPE_PRECISION (intmax_type_node
);
1161 cpp_opts
->char_precision
= TYPE_PRECISION (char_type_node
);
1162 cpp_opts
->int_precision
= TYPE_PRECISION (integer_type_node
);
1163 cpp_opts
->wchar_precision
= TYPE_PRECISION (wchar_type_node
);
1164 cpp_opts
->unsigned_wchar
= TREE_UNSIGNED (wchar_type_node
);
1165 cpp_opts
->bytes_big_endian
= BYTES_BIG_ENDIAN
;
1167 /* This can't happen until after wchar_precision and bytes_big_endian
1169 cpp_init_iconv (parse_in
);
1171 if (flag_preprocess_only
)
1173 finish_options (in_fnames
[0]);
1174 preprocess_file (parse_in
);
1178 /* Has to wait until now so that cpplib has its hash table. */
1184 /* Initialize the integrated preprocessor after debug output has been
1185 initialized; loop over each input file. */
1187 c_common_parse_file (int set_yydebug ATTRIBUTE_UNUSED
)
1189 unsigned file_index
;
1192 yydebug
= set_yydebug
;
1194 warning ("YYDEBUG not defined");
1203 /* Reset the state of the parser. */
1206 /* Reset cpplib's macros and start a new file. */
1207 cpp_undef_all (parse_in
);
1208 cpp_read_main_file (parse_in
, in_fnames
[file_index
]);
1211 finish_options(in_fnames
[file_index
]);
1212 if (file_index
== 0)
1217 } while (file_index
< num_in_fnames
);
1219 free_parser_stacks ();
1223 /* Common finish hook for the C, ObjC and C++ front ends. */
1225 c_common_finish (void)
1227 FILE *deps_stream
= NULL
;
1229 if (cpp_opts
->deps
.style
!= DEPS_NONE
)
1231 /* If -M or -MM was seen without -MF, default output to the
1234 deps_stream
= out_stream
;
1237 deps_stream
= fopen (deps_file
, deps_append
? "a": "w");
1239 fatal_error ("opening dependency file %s: %m", deps_file
);
1243 /* For performance, avoid tearing down cpplib's internal structures
1244 with cpp_destroy (). */
1245 errorcount
+= cpp_finish (parse_in
, deps_stream
);
1247 if (deps_stream
&& deps_stream
!= out_stream
1248 && (ferror (deps_stream
) || fclose (deps_stream
)))
1249 fatal_error ("closing dependency file %s: %m", deps_file
);
1251 if (out_stream
&& (ferror (out_stream
) || fclose (out_stream
)))
1252 fatal_error ("when writing output to %s: %m", out_fname
);
1255 /* Either of two environment variables can specify output of
1256 dependencies. Their value is either "OUTPUT_FILE" or "OUTPUT_FILE
1257 DEPS_TARGET", where OUTPUT_FILE is the file to write deps info to
1258 and DEPS_TARGET is the target to mention in the deps. They also
1259 result in dependency information being appended to the output file
1260 rather than overwriting it, and like Sun's compiler
1261 SUNPRO_DEPENDENCIES suppresses the dependency on the main file. */
1263 check_deps_environment_vars (void)
1267 GET_ENVIRONMENT (spec
, "DEPENDENCIES_OUTPUT");
1269 cpp_opts
->deps
.style
= DEPS_USER
;
1272 GET_ENVIRONMENT (spec
, "SUNPRO_DEPENDENCIES");
1275 cpp_opts
->deps
.style
= DEPS_SYSTEM
;
1276 cpp_opts
->deps
.ignore_main_file
= true;
1282 /* Find the space before the DEPS_TARGET, if there is one. */
1283 char *s
= strchr (spec
, ' ');
1286 /* Let the caller perform MAKE quoting. */
1287 defer_opt (OPT_MT
, s
+ 1);
1291 /* Command line -MF overrides environment variables and default. */
1299 /* Handle deferred command line switches. */
1301 handle_deferred_opts (void)
1305 for (i
= 0; i
< deferred_count
; i
++)
1307 struct deferred_opt
*opt
= &deferred_opts
[i
];
1309 if (opt
->code
== OPT_MT
|| opt
->code
== OPT_MQ
)
1310 cpp_add_dependency_target (parse_in
, opt
->arg
, opt
->code
== OPT_MQ
);
1314 /* These settings are appropriate for GCC, but not necessarily so for
1315 cpplib as a library. */
1317 sanitize_cpp_opts (void)
1319 /* If we don't know what style of dependencies to output, complain
1320 if any other dependency switches have been given. */
1321 if (deps_seen
&& cpp_opts
->deps
.style
== DEPS_NONE
)
1322 error ("to generate dependencies you must specify either -M or -MM");
1324 /* -dM and dependencies suppress normal output; do it here so that
1325 the last -d[MDN] switch overrides earlier ones. */
1326 if (flag_dump_macros
== 'M')
1329 /* Disable -dD, -dN and -dI if normal output is suppressed. Allow
1330 -dM since at least glibc relies on -M -dM to work. */
1333 if (flag_dump_macros
!= 'M')
1334 flag_dump_macros
= 0;
1335 flag_dump_includes
= 0;
1338 cpp_opts
->unsigned_char
= !flag_signed_char
;
1339 cpp_opts
->stdc_0_in_system_headers
= STDC_0_IN_SYSTEM_HEADERS
;
1341 /* We want -Wno-long-long to override -pedantic -std=non-c99
1342 and/or -Wtraditional, whatever the ordering. */
1343 cpp_opts
->warn_long_long
1344 = warn_long_long
&& ((!flag_isoc99
&& pedantic
) || warn_traditional
);
1346 /* If we're generating preprocessor output, emit current directory
1347 if explicitly requested or if debugging information is enabled.
1348 ??? Maybe we should only do it for debugging formats that
1349 actually output the current directory? */
1350 if (flag_working_directory
== -1)
1351 flag_working_directory
= (debug_info_level
!= DINFO_LEVEL_NONE
);
1352 cpp_opts
->working_directory
1353 = flag_preprocess_only
&& flag_working_directory
;
1356 /* Add include path with a prefix at the front of its name. */
1358 add_prefixed_path (const char *suffix
, size_t chain
)
1362 size_t prefix_len
, suffix_len
;
1364 suffix_len
= strlen (suffix
);
1365 prefix
= iprefix
? iprefix
: cpp_GCC_INCLUDE_DIR
;
1366 prefix_len
= iprefix
? strlen (iprefix
) : cpp_GCC_INCLUDE_DIR_len
;
1368 path
= xmalloc (prefix_len
+ suffix_len
+ 1);
1369 memcpy (path
, prefix
, prefix_len
);
1370 memcpy (path
+ prefix_len
, suffix
, suffix_len
);
1371 path
[prefix_len
+ suffix_len
] = '\0';
1373 add_path (path
, chain
, 0);
1376 /* Handle -D, -U, -A, -imacros, and the first -include.
1377 TIF is the input file to which we will return after processing all
1380 finish_options (const char *tif
)
1382 if (!cpp_opts
->preprocessed
)
1386 cpp_change_file (parse_in
, LC_RENAME
, _("<built-in>"));
1387 cpp_init_builtins (parse_in
, flag_hosted
);
1388 c_cpp_builtins (parse_in
);
1390 /* We're about to send user input to cpplib, so make it warn for
1391 things that we previously (when we sent it internal definitions)
1392 told it to not warn.
1394 C99 permits implementation-defined characters in identifiers.
1395 The documented meaning of -std= is to turn off extensions that
1396 conflict with the specified standard, and since a strictly
1397 conforming program cannot contain a '$', we do not condition
1398 their acceptance on the -std= setting. */
1399 cpp_opts
->warn_dollars
= (cpp_opts
->pedantic
&& !cpp_opts
->c99
);
1401 cpp_change_file (parse_in
, LC_RENAME
, _("<command line>"));
1402 for (i
= 0; i
< deferred_count
; i
++)
1404 struct deferred_opt
*opt
= &deferred_opts
[i
];
1406 if (opt
->code
== OPT_D
)
1407 cpp_define (parse_in
, opt
->arg
);
1408 else if (opt
->code
== OPT_U
)
1409 cpp_undef (parse_in
, opt
->arg
);
1410 else if (opt
->code
== OPT_A
)
1412 if (opt
->arg
[0] == '-')
1413 cpp_unassert (parse_in
, opt
->arg
+ 1);
1415 cpp_assert (parse_in
, opt
->arg
);
1419 /* Handle -imacros after -D and -U. */
1420 for (i
= 0; i
< deferred_count
; i
++)
1422 struct deferred_opt
*opt
= &deferred_opts
[i
];
1424 if (opt
->code
== OPT_imacros
1425 && cpp_push_include (parse_in
, opt
->arg
))
1426 cpp_scan_nooutput (parse_in
);
1431 this_input_filename
= tif
;
1432 push_command_line_include ();
1435 /* Give CPP the next file given by -include, if any. */
1437 push_command_line_include (void)
1439 if (cpp_opts
->preprocessed
)
1442 while (include_cursor
< deferred_count
)
1444 struct deferred_opt
*opt
= &deferred_opts
[include_cursor
++];
1446 if (opt
->code
== OPT_include
&& cpp_push_include (parse_in
, opt
->arg
))
1450 if (include_cursor
== deferred_count
)
1452 /* Restore the line map from <command line>. */
1453 cpp_change_file (parse_in
, LC_RENAME
, this_input_filename
);
1454 /* -Wunused-macros should only warn about macros defined hereafter. */
1455 cpp_opts
->warn_unused_macros
= warn_unused_macros
;
1460 /* File change callback. Has to handle -include files. */
1462 cb_file_change (cpp_reader
*pfile ATTRIBUTE_UNUSED
,
1463 const struct line_map
*new_map
)
1465 if (flag_preprocess_only
)
1466 pp_file_change (new_map
);
1468 fe_file_change (new_map
);
1470 if (new_map
->reason
== LC_LEAVE
&& MAIN_FILE_P (new_map
))
1471 push_command_line_include ();
1474 /* Set the C 89 standard (with 1994 amendments if C94, without GNU
1475 extensions if ISO). There is no concept of gnu94. */
1477 set_std_c89 (int c94
, int iso
)
1479 cpp_set_lang (parse_in
, c94
? CLK_STDC94
: iso
? CLK_STDC89
: CLK_GNUC89
);
1482 flag_no_gnu_keywords
= iso
;
1483 flag_no_nonansi_builtin
= iso
;
1486 flag_writable_strings
= 0;
1489 /* Set the C 99 standard (without GNU extensions if ISO). */
1491 set_std_c99 (int iso
)
1493 cpp_set_lang (parse_in
, iso
? CLK_STDC99
: CLK_GNUC99
);
1495 flag_no_nonansi_builtin
= iso
;
1499 flag_writable_strings
= 0;
1502 /* Set the C++ 98 standard (without GNU extensions if ISO). */
1504 set_std_cxx98 (int iso
)
1506 cpp_set_lang (parse_in
, iso
? CLK_CXX98
: CLK_GNUCXX
);
1507 flag_no_gnu_keywords
= iso
;
1508 flag_no_nonansi_builtin
= iso
;
1512 /* Handle setting implicit to ON. */
1514 set_Wimplicit (int on
)
1517 warn_implicit_int
= on
;
1520 if (mesg_implicit_function_declaration
!= 2)
1521 mesg_implicit_function_declaration
= 1;
1524 mesg_implicit_function_declaration
= 0;
1527 /* Args to -d specify what to dump. Silently ignore
1528 unrecognized options; they may be aimed at toplev.c. */
1530 handle_OPT_d (const char *arg
)
1534 while ((c
= *arg
++) != '\0')
1537 case 'M': /* Dump macros only. */
1538 case 'N': /* Dump names. */
1539 case 'D': /* Dump definitions. */
1540 flag_dump_macros
= c
;
1544 flag_dump_includes
= 1;