1 /* Command line option handling.
2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007
3 Free Software Foundation, Inc.
4 Contributed by Neil Booth.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
25 #include "coretypes.h"
31 #include "langhooks.h"
37 #include "diagnostic.h"
38 #include "tm_p.h" /* For OPTIMIZATION_OPTIONS. */
39 #include "insn-attr.h" /* For INSN_SCHEDULING. */
41 #include "tree-pass.h"
45 /* Value of the -G xx switch, and whether it was passed or not. */
46 unsigned HOST_WIDE_INT g_switch_value;
49 /* True if we should exit after parsing options. */
50 bool exit_after_options;
52 /* Print various extra warnings. -W/-Wextra. */
55 /* True to warn about any objects definitions whose size is larger
56 than N bytes. Also want about function definitions whose returned
57 values are larger than N bytes, where N is `larger_than_size'. */
58 bool warn_larger_than;
59 HOST_WIDE_INT larger_than_size;
61 /* Hack for cooperation between set_Wunused and set_Wextra. */
62 static bool maybe_warn_unused_parameter;
64 /* Type(s) of debugging information we are producing (if any). See
65 flags.h for the definitions of the different possible types of
66 debugging information. */
67 enum debug_info_type write_symbols = NO_DEBUG;
69 /* Level of debugging information we are producing. See flags.h for
70 the definitions of the different possible levels. */
71 enum debug_info_level debug_info_level = DINFO_LEVEL_NONE;
73 /* A major contribution to object and executable size is debug
74 information size. A major contribution to debug information size
75 is struct descriptions replicated in several object files. The
76 following flags attempt to reduce this information. The basic
77 idea is to not emit struct debugging information in the current
78 compilation unit when that information will be generated by
79 another compilation unit.
81 Debug information for a struct defined in the current source
82 file should be generated in the object file. Likewise the
83 debug information for a struct defined in a header should be
84 generated in the object file of the corresponding source file.
85 Both of these case are handled when the base name of the file of
86 the struct definition matches the base name of the source file
87 of the current compilation unit. This matching emits minimal
88 struct debugging information.
90 The base file name matching rule above will fail to emit debug
91 information for structs defined in system headers. So a second
92 category of files includes system headers in addition to files
95 The remaining types of files are library headers and application
96 headers. We cannot currently distinguish these two types. */
98 enum debug_struct_file
100 DINFO_STRUCT_FILE_NONE, /* Debug no structs. */
101 DINFO_STRUCT_FILE_BASE, /* Debug structs defined in files with the
102 same base name as the compilation unit. */
103 DINFO_STRUCT_FILE_SYS, /* Also debug structs defined in system
105 DINFO_STRUCT_FILE_ANY /* Debug structs defined in all files. */
108 /* Generic structs (e.g. templates not explicitly specialized)
109 may not have a compilation unit associated with them, and so
110 may need to be treated differently from ordinary structs.
112 Structs only handled by reference (indirectly), will also usually
113 not need as much debugging information. */
115 static enum debug_struct_file debug_struct_ordinary[DINFO_USAGE_NUM_ENUMS]
116 = { DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY };
117 static enum debug_struct_file debug_struct_generic[DINFO_USAGE_NUM_ENUMS]
118 = { DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY };
120 /* Parse the -femit-struct-debug-detailed option value
121 and set the flag variables. */
123 #define MATCH( prefix, string ) \
124 ((strncmp (prefix, string, sizeof prefix - 1) == 0) \
125 ? ((string += sizeof prefix - 1), 1) : 0)
128 set_struct_debug_option (const char *spec)
130 /* various labels for comparison */
131 static char dfn_lbl[] = "dfn:", dir_lbl[] = "dir:", ind_lbl[] = "ind:";
132 static char ord_lbl[] = "ord:", gen_lbl[] = "gen:";
133 static char none_lbl[] = "none", any_lbl[] = "any";
134 static char base_lbl[] = "base", sys_lbl[] = "sys";
136 enum debug_struct_file files = DINFO_STRUCT_FILE_ANY;
137 /* Default is to apply to as much as possible. */
138 enum debug_info_usage usage = DINFO_USAGE_NUM_ENUMS;
139 int ord = 1, gen = 1;
142 if (MATCH (dfn_lbl, spec))
143 usage = DINFO_USAGE_DFN;
144 else if (MATCH (dir_lbl, spec))
145 usage = DINFO_USAGE_DIR_USE;
146 else if (MATCH (ind_lbl, spec))
147 usage = DINFO_USAGE_IND_USE;
149 /* Generics or not? */
150 if (MATCH (ord_lbl, spec))
152 else if (MATCH (gen_lbl, spec))
155 /* What allowable environment? */
156 if (MATCH (none_lbl, spec))
157 files = DINFO_STRUCT_FILE_NONE;
158 else if (MATCH (any_lbl, spec))
159 files = DINFO_STRUCT_FILE_ANY;
160 else if (MATCH (sys_lbl, spec))
161 files = DINFO_STRUCT_FILE_SYS;
162 else if (MATCH (base_lbl, spec))
163 files = DINFO_STRUCT_FILE_BASE;
165 error ("argument %qs to %<-femit-struct-debug-detailed%> not recognized",
168 /* Effect the specification. */
169 if (usage == DINFO_USAGE_NUM_ENUMS)
173 debug_struct_ordinary[DINFO_USAGE_DFN] = files;
174 debug_struct_ordinary[DINFO_USAGE_DIR_USE] = files;
175 debug_struct_ordinary[DINFO_USAGE_IND_USE] = files;
179 debug_struct_generic[DINFO_USAGE_DFN] = files;
180 debug_struct_generic[DINFO_USAGE_DIR_USE] = files;
181 debug_struct_generic[DINFO_USAGE_IND_USE] = files;
187 debug_struct_ordinary[usage] = files;
189 debug_struct_generic[usage] = files;
193 set_struct_debug_option (spec+1);
196 /* No more -femit-struct-debug-detailed specifications.
199 error ("argument %qs to %<-femit-struct-debug-detailed%> unknown",
201 if (debug_struct_ordinary[DINFO_USAGE_DIR_USE]
202 < debug_struct_ordinary[DINFO_USAGE_IND_USE]
203 || debug_struct_generic[DINFO_USAGE_DIR_USE]
204 < debug_struct_generic[DINFO_USAGE_IND_USE])
205 error ("%<-femit-struct-debug-detailed=dir:...%> must allow at least"
206 " as much as %<-femit-struct-debug-detailed=ind:...%>");
210 /* Find the base name of a path, stripping off both directories and
211 a single final extension. */
213 base_of_path (const char *path, const char **base_out)
215 const char *base = path;
217 const char *p = path;
221 if (IS_DIR_SEPARATOR(c))
236 /* Match the base name of a file to the base name of a compilation unit. */
238 static const char *main_input_basename;
239 static int main_input_baselength;
242 matches_main_base (const char *path)
244 /* Cache the last query. */
245 static const char *last_path = NULL;
246 static int last_match = 0;
247 if (path != last_path)
250 int length = base_of_path (path, &base);
252 last_match = (length == main_input_baselength
253 && memcmp (base, main_input_basename, length) == 0);
258 #ifdef DEBUG_DEBUG_STRUCT
261 dump_struct_debug (tree type, enum debug_info_usage usage,
262 enum debug_struct_file criterion, int generic,
263 int matches, int result)
265 /* Find the type name. */
266 tree type_decl = TYPE_STUB_DECL (type);
268 const char *name = 0;
269 if (TREE_CODE (t) == TYPE_DECL)
272 name = IDENTIFIER_POINTER (t);
274 fprintf (stderr, " struct %d %s %s %s %s %d %p %s\n",
276 DECL_IN_SYSTEM_HEADER (type_decl) ? "sys" : "usr",
277 matches ? "bas" : "hdr",
278 generic ? "gen" : "ord",
279 usage == DINFO_USAGE_DFN ? ";" :
280 usage == DINFO_USAGE_DIR_USE ? "." : "*",
282 (void*) type_decl, name);
285 #define DUMP_GSTRUCT(type, usage, criterion, generic, matches, result) \
286 dump_struct_debug (type, usage, criterion, generic, matches, result)
290 #define DUMP_GSTRUCT(type, usage, criterion, generic, matches, result) \
297 should_emit_struct_debug (tree type, enum debug_info_usage usage)
299 enum debug_struct_file criterion;
301 bool generic = lang_hooks.types.generic_p (type);
304 criterion = debug_struct_generic[usage];
306 criterion = debug_struct_ordinary[usage];
308 if (criterion == DINFO_STRUCT_FILE_NONE)
309 return DUMP_GSTRUCT (type, usage, criterion, generic, false, false);
310 if (criterion == DINFO_STRUCT_FILE_ANY)
311 return DUMP_GSTRUCT (type, usage, criterion, generic, false, true);
313 type_decl = TYPE_STUB_DECL (type);
315 if (criterion == DINFO_STRUCT_FILE_SYS && DECL_IN_SYSTEM_HEADER (type_decl))
316 return DUMP_GSTRUCT (type, usage, criterion, generic, false, true);
318 if (matches_main_base (DECL_SOURCE_FILE (type_decl)))
319 return DUMP_GSTRUCT (type, usage, criterion, generic, true, true);
320 return DUMP_GSTRUCT (type, usage, criterion, generic, false, false);
323 /* Nonzero means use GNU-only extensions in the generated symbolic
324 debugging information. Currently, this only has an effect when
325 write_symbols is set to DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
326 bool use_gnu_debug_info_extensions;
328 /* The default visibility for all symbols (unless overridden) */
329 enum symbol_visibility default_visibility = VISIBILITY_DEFAULT;
331 /* Disable unit-at-a-time for frontends that might be still broken in this
334 bool no_unit_at_a_time_default;
336 /* Global visibility options. */
337 struct visibility_flags visibility_options;
339 /* What to print when a switch has no documentation. */
340 #ifdef ENABLE_CHECKING
341 static const char undocumented_msg[] = N_("This switch lacks documentation");
343 static const char undocumented_msg[] = "";
346 /* Used for bookkeeping on whether user set these flags so
347 -fprofile-use/-fprofile-generate does not use them. */
348 static bool profile_arc_flag_set, flag_profile_values_set;
349 static bool flag_unroll_loops_set, flag_tracer_set;
350 static bool flag_value_profile_transformations_set;
351 static bool flag_peel_loops_set, flag_branch_probabilities_set;
352 static bool flag_inline_functions_set;
354 /* Functions excluded from profiling. */
356 typedef char *char_p; /* For DEF_VEC_P. */
358 DEF_VEC_ALLOC_P(char_p,heap);
360 static VEC(char_p,heap) *flag_instrument_functions_exclude_functions;
361 static VEC(char_p,heap) *flag_instrument_functions_exclude_files;
363 /* Input file names. */
364 const char **in_fnames;
365 unsigned num_in_fnames;
367 static int common_handle_option (size_t scode, const char *arg, int value,
368 unsigned int lang_mask);
369 static void handle_param (const char *);
370 static void set_Wextra (int);
371 static unsigned int handle_option (const char **argv, unsigned int lang_mask);
372 static char *write_langs (unsigned int lang_mask);
373 static void complain_wrong_lang (const char *, const struct cl_option *,
374 unsigned int lang_mask);
375 static void handle_options (unsigned int, const char **, unsigned int);
376 static void set_debug_level (enum debug_info_type type, int extended,
379 /* If ARG is a non-negative integer made up solely of digits, return its
380 value, otherwise return -1. */
382 integral_argument (const char *arg)
386 while (*p && ISDIGIT (*p))
395 /* Return a malloced slash-separated list of languages in MASK. */
397 write_langs (unsigned int mask)
399 unsigned int n = 0, len = 0;
400 const char *lang_name;
403 for (n = 0; (lang_name = lang_names[n]) != 0; n++)
404 if (mask & (1U << n))
405 len += strlen (lang_name) + 1;
407 result = XNEWVEC (char, len);
409 for (n = 0; (lang_name = lang_names[n]) != 0; n++)
410 if (mask & (1U << n))
414 strcpy (result + len, lang_name);
415 len += strlen (lang_name);
423 /* Complain that switch OPT_INDEX does not apply to this front end. */
425 complain_wrong_lang (const char *text, const struct cl_option *option,
426 unsigned int lang_mask)
428 char *ok_langs, *bad_lang;
430 ok_langs = write_langs (option->flags);
431 bad_lang = write_langs (lang_mask);
433 /* Eventually this should become a hard error IMO. */
434 warning (0, "command line option \"%s\" is valid for %s but not for %s",
435 text, ok_langs, bad_lang);
441 /* Handle the switch beginning at ARGV for the language indicated by
442 LANG_MASK. Returns the number of switches consumed. */
444 handle_option (const char **argv, unsigned int lang_mask)
447 const char *opt, *arg = 0;
450 unsigned int result = 0;
451 const struct cl_option *option;
455 opt_index = find_opt (opt + 1, lang_mask | CL_COMMON | CL_TARGET);
456 if (opt_index == cl_options_count
457 && (opt[1] == 'W' || opt[1] == 'f' || opt[1] == 'm')
458 && opt[2] == 'n' && opt[3] == 'o' && opt[4] == '-')
460 /* Drop the "no-" from negative switches. */
461 size_t len = strlen (opt) - 3;
463 dup = XNEWVEC (char, len + 1);
466 memcpy (dup + 2, opt + 5, len - 2 + 1);
469 opt_index = find_opt (opt + 1, lang_mask | CL_COMMON | CL_TARGET);
472 if (opt_index == cl_options_count)
475 option = &cl_options[opt_index];
477 /* Reject negative form of switches that don't take negatives as
479 if (!value && (option->flags & CL_REJECT_NEGATIVE))
482 /* We've recognized this switch. */
485 /* Check to see if the option is disabled for this configuration. */
486 if (option->flags & CL_DISABLED)
488 error ("command line option %qs"
489 " is not supported by this configuration", opt);
493 /* Sort out any argument the switch takes. */
494 if (option->flags & CL_JOINED)
496 /* Have arg point to the original switch. This is because
497 some code, such as disable_builtin_function, expects its
498 argument to be persistent until the program exits. */
499 arg = argv[0] + cl_options[opt_index].opt_len + 1;
501 arg += strlen ("no-");
503 if (*arg == '\0' && !(option->flags & CL_MISSING_OK))
505 if (option->flags & CL_SEPARATE)
511 /* Missing argument. */
515 else if (option->flags & CL_SEPARATE)
521 /* Now we've swallowed any potential argument, complain if this
522 is a switch for a different front end. */
523 if (!(option->flags & (lang_mask | CL_COMMON | CL_TARGET)))
525 complain_wrong_lang (argv[0], option, lang_mask);
528 else if ((option->flags & CL_TARGET)
529 && (option->flags & CL_LANG_ALL)
530 && !(option->flags & lang_mask))
532 /* Complain for target flag language mismatches if any languages
534 complain_wrong_lang (argv[0], option, lang_mask);
538 if (arg == NULL && (option->flags & (CL_JOINED | CL_SEPARATE)))
540 if (!lang_hooks.missing_argument (opt, opt_index))
541 error ("missing argument to \"%s\"", opt);
545 /* If the switch takes an integer, convert it. */
546 if (arg && (option->flags & CL_UINTEGER))
548 value = integral_argument (arg);
551 error ("argument to \"%s\" should be a non-negative integer",
557 if (option->flag_var)
558 switch (option->var_type)
561 *(int *) option->flag_var = value;
565 *(int *) option->flag_var = (value
567 : !option->var_value);
572 if ((value != 0) == (option->var_type == CLVC_BIT_SET))
573 *(int *) option->flag_var |= option->var_value;
575 *(int *) option->flag_var &= ~option->var_value;
576 if (option->flag_var == &target_flags)
577 target_flags_explicit |= option->var_value;
581 *(const char **) option->flag_var = arg;
585 if (option->flags & lang_mask)
586 if (lang_hooks.handle_option (opt_index, arg, value) == 0)
589 if (result && (option->flags & CL_COMMON))
590 if (common_handle_option (opt_index, arg, value, lang_mask) == 0)
593 if (result && (option->flags & CL_TARGET))
594 if (!targetm.handle_option (opt_index, arg, value))
603 /* Handle FILENAME from the command line. */
605 add_input_filename (const char *filename)
608 in_fnames = xrealloc (in_fnames, num_in_fnames * sizeof (in_fnames[0]));
609 in_fnames[num_in_fnames - 1] = filename;
612 /* Add functions or file names to a vector of names to exclude from
616 add_instrument_functions_exclude_list (VEC(char_p,heap) **pvec,
624 /* We never free this string. */
637 VEC_safe_push (char_p, heap, *pvec, token_start);
640 if (*r == '\\' && r[1] == ',')
648 if (*token_start != '\0')
649 VEC_safe_push (char_p, heap, *pvec, token_start);
652 /* Return whether we should exclude FNDECL from instrumentation. */
655 flag_instrument_functions_exclude_p (tree fndecl)
657 if (VEC_length (char_p, flag_instrument_functions_exclude_functions) > 0)
663 name = lang_hooks.decl_printable_name (fndecl, 0);
665 VEC_iterate (char_p, flag_instrument_functions_exclude_functions,
669 if (strstr (name, s) != NULL)
674 if (VEC_length (char_p, flag_instrument_functions_exclude_files) > 0)
680 name = DECL_SOURCE_FILE (fndecl);
682 VEC_iterate (char_p, flag_instrument_functions_exclude_files, i, s);
685 if (strstr (name, s) != NULL)
693 /* Decode and handle the vector of command line options. LANG_MASK
694 contains has a single bit set representing the current
697 handle_options (unsigned int argc, const char **argv, unsigned int lang_mask)
701 for (i = 1; i < argc; i += n)
703 const char *opt = argv[i];
705 /* Interpret "-" or a non-switch as a file name. */
706 if (opt[0] != '-' || opt[1] == '\0')
708 if (main_input_filename == NULL)
710 main_input_filename = opt;
711 main_input_baselength
712 = base_of_path (main_input_filename, &main_input_basename);
714 add_input_filename (opt);
719 n = handle_option (argv + i, lang_mask);
724 error ("unrecognized command line option \"%s\"", opt);
729 /* Parse command line options and set default flag values. Do minimal
730 options processing. */
732 decode_options (unsigned int argc, const char **argv)
734 unsigned int i, lang_mask;
736 /* Perform language-specific options initialization. */
737 lang_mask = lang_hooks.init_options (argc, argv);
739 lang_hooks.initialize_diagnostics (global_dc);
741 /* Scan to see what optimization level has been specified. That will
742 determine the default value of many flags. */
743 for (i = 1; i < argc; i++)
745 if (!strcmp (argv[i], "-O"))
750 else if (argv[i][0] == '-' && argv[i][1] == 'O')
752 /* Handle -Os, -O2, -O3, -O69, ... */
753 const char *p = &argv[i][2];
755 if ((p[0] == 's') && (p[1] == 0))
759 /* Optimizing for size forces optimize to be 2. */
764 const int optimize_val = read_integral_parameter (p, p - 2, -1);
765 if (optimize_val != -1)
767 optimize = optimize_val;
776 flag_merge_constants = 0;
783 flag_delayed_branch = 1;
785 #ifdef CAN_DEBUG_WITHOUT_FP
786 flag_omit_frame_pointer = 1;
788 flag_guess_branch_prob = 1;
789 flag_cprop_registers = 1;
790 flag_if_conversion = 1;
791 flag_if_conversion2 = 1;
792 flag_ipa_pure_const = 1;
793 flag_ipa_reference = 1;
794 flag_split_wide_types = 1;
801 flag_tree_copyrename = 1;
803 flag_tree_copy_prop = 1;
805 flag_tree_salias = 1;
806 if (!no_unit_at_a_time_default)
807 flag_unit_at_a_time = 1;
811 /* Loop header copying usually increases size of the code. This used
812 not to be true, since quite often it is possible to verify that
813 the condition is satisfied in the first iteration and therefore
814 to eliminate it. Jump threading handles these cases now. */
821 flag_inline_small_functions = 1;
822 flag_thread_jumps = 1;
823 flag_crossjumping = 1;
824 flag_optimize_sibling_calls = 1;
825 flag_forward_propagate = 1;
826 flag_cse_follow_jumps = 1;
828 flag_expensive_optimizations = 1;
829 flag_rerun_cse_after_loop = 1;
830 flag_caller_saves = 1;
832 #ifdef INSN_SCHEDULING
833 flag_schedule_insns = 1;
834 flag_schedule_insns_after_reload = 1;
837 flag_strict_aliasing = 1;
838 flag_strict_overflow = 1;
839 flag_delete_null_pointer_checks = 1;
840 flag_reorder_blocks = 1;
841 flag_reorder_functions = 1;
842 flag_tree_store_ccp = 1;
847 /* PRE tends to generate bigger code. */
851 /* Allow more virtual operators to increase alias precision. */
852 set_param_value ("max-aliased-vops", 500);
857 flag_predictive_commoning = 1;
858 flag_inline_functions = 1;
859 flag_unswitch_loops = 1;
860 flag_gcse_after_reload = 1;
861 flag_tree_vectorize = 1;
863 /* Allow even more virtual operators. */
864 set_param_value ("max-aliased-vops", 1000);
865 set_param_value ("avg-aliased-vops", 3);
868 if (optimize < 2 || optimize_size)
875 /* Don't reorder blocks when optimizing for size because extra
876 jump insns may be created; also barrier may create extra padding.
878 More correctly we should have a block reordering mode that tried
879 to minimize the combined size of all the jumps. This would more
880 or less automatically remove extra jumps, but would also try to
881 use more short jumps instead of long jumps. */
882 flag_reorder_blocks = 0;
883 flag_reorder_blocks_and_partition = 0;
888 /* Inlining of functions reducing size is a good idea regardless
889 of them being declared inline. */
890 flag_inline_functions = 1;
892 /* We want to crossjump as much as possible. */
893 set_param_value ("min-crossjump-insns", 1);
896 /* Initialize whether `char' is signed. */
897 flag_signed_char = DEFAULT_SIGNED_CHAR;
898 /* Set this to a special "uninitialized" value. The actual default is set
899 after target options have been processed. */
900 flag_short_enums = 2;
902 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
904 target_flags = targetm.default_target_flags;
906 /* Some tagets have ABI-specified unwind tables. */
907 flag_unwind_tables = targetm.unwind_tables_default;
909 #ifdef OPTIMIZATION_OPTIONS
910 /* Allow default optimizations to be specified on a per-machine basis. */
911 OPTIMIZATION_OPTIONS (optimize, optimize_size);
914 handle_options (argc, argv, lang_mask);
918 if (flag_pic && !flag_pie)
921 if (flag_no_inline == 2)
924 flag_really_no_inline = flag_no_inline;
926 /* Set flag_no_inline before the post_options () hook. The C front
927 ends use it to determine tree inlining defaults. FIXME: such
928 code should be lang-independent when all front ends use tree
929 inlining, in which case it, and this condition, should be moved
930 to the top of process_options() instead. */
933 /* Inlining does not work if not optimizing,
934 so force it not to be done. */
938 /* The c_decode_option function and decode_option hook set
939 this to `2' if -Wall is used, so we can avoid giving out
940 lots of errors for people who don't realize what -Wall does. */
941 if (warn_uninitialized == 1)
942 warning (OPT_Wuninitialized,
943 "-Wuninitialized is not supported without -O");
946 if (flag_really_no_inline == 2)
947 flag_really_no_inline = flag_no_inline;
949 /* Inlining of functions called just once will only work if we can look
950 at the complete translation unit. */
951 if (flag_inline_functions_called_once && !flag_unit_at_a_time)
953 flag_inline_functions_called_once = 0;
954 warning (OPT_Wdisabled_optimization,
955 "-funit-at-a-time is required for inlining of functions "
956 "that are only called once");
959 /* The optimization to partition hot and cold basic blocks into separate
960 sections of the .o and executable files does not work (currently)
961 with exception handling. This is because there is no support for
962 generating unwind info. If flag_exceptions is turned on we need to
963 turn off the partitioning optimization. */
965 if (flag_exceptions && flag_reorder_blocks_and_partition)
968 ("-freorder-blocks-and-partition does not work with exceptions");
969 flag_reorder_blocks_and_partition = 0;
970 flag_reorder_blocks = 1;
973 /* If user requested unwind info, then turn off the partitioning
976 if (flag_unwind_tables && ! targetm.unwind_tables_default
977 && flag_reorder_blocks_and_partition)
979 inform ("-freorder-blocks-and-partition does not support unwind info");
980 flag_reorder_blocks_and_partition = 0;
981 flag_reorder_blocks = 1;
984 /* If the target requested unwind info, then turn off the partitioning
985 optimization with a different message. Likewise, if the target does not
986 support named sections. */
988 if (flag_reorder_blocks_and_partition
989 && (!targetm.have_named_sections
990 || (flag_unwind_tables && targetm.unwind_tables_default)))
993 ("-freorder-blocks-and-partition does not work on this architecture");
994 flag_reorder_blocks_and_partition = 0;
995 flag_reorder_blocks = 1;
999 #define LEFT_COLUMN 27
1001 /* Output ITEM, of length ITEM_WIDTH, in the left column,
1002 followed by word-wrapped HELP in a second column. */
1004 wrap_help (const char *help,
1006 unsigned int item_width,
1007 unsigned int columns)
1009 unsigned int col_width = LEFT_COLUMN;
1010 unsigned int remaining, room, len;
1012 remaining = strlen (help);
1016 room = columns - 3 - MAX (col_width, item_width);
1025 for (i = 0; help[i]; i++)
1027 if (i >= room && len != remaining)
1031 else if ((help[i] == '-' || help[i] == '/')
1032 && help[i + 1] != ' '
1033 && i > 0 && ISALPHA (help[i - 1]))
1038 printf( " %-*.*s %.*s\n", col_width, item_width, item, len, help);
1040 while (help[len] == ' ')
1048 /* Print help for a specific front-end, etc. */
1050 print_filtered_help (unsigned int include_flags,
1051 unsigned int exclude_flags,
1052 unsigned int any_flags,
1053 unsigned int columns)
1057 static char *printed = NULL;
1059 bool displayed = false;
1061 if (include_flags == CL_PARAMS)
1063 for (i = 0; i < LAST_PARAM; i++)
1065 const char *param = compiler_params[i].option;
1067 help = compiler_params[i].help;
1068 if (help == NULL || *help == '\0')
1070 if (exclude_flags & CL_UNDOCUMENTED)
1072 help = undocumented_msg;
1075 /* Get the translation. */
1078 wrap_help (help, param, strlen (param), columns);
1085 printed = xcalloc (1, cl_options_count);
1087 for (i = 0; i < cl_options_count; i++)
1089 static char new_help[128];
1090 const struct cl_option *option = cl_options + i;
1095 if (include_flags == 0
1096 || ((option->flags & include_flags) != include_flags))
1098 if ((option->flags & any_flags) == 0)
1102 /* Skip unwanted switches. */
1103 if ((option->flags & exclude_flags) != 0)
1107 /* Skip switches that have already been printed. */
1113 help = option->help;
1116 if (exclude_flags & CL_UNDOCUMENTED)
1118 help = undocumented_msg;
1121 /* Get the translation. */
1124 /* Find the gap between the name of the
1125 option and its descriptive text. */
1126 tab = strchr (help, '\t');
1135 opt = option->opt_text;
1139 /* With the -Q option enabled we change the descriptive text associated
1140 with an option to be an indication of its current setting. */
1143 if (len < (LEFT_COLUMN + 2))
1144 strcpy (new_help, "\t\t");
1146 strcpy (new_help, "\t");
1148 if (option->flag_var != NULL)
1150 if (option->flags & CL_JOINED)
1152 if (option->var_type == CLVC_STRING)
1154 if (* (const char **) option->flag_var != NULL)
1155 snprintf (new_help + strlen (new_help),
1156 sizeof (new_help) - strlen (new_help),
1157 * (const char **) option->flag_var);
1160 sprintf (new_help + strlen (new_help),
1161 "%#x", * (int *) option->flag_var);
1164 strcat (new_help, option_enabled (i)
1165 ? _("[enabled]") : _("[disabled]"));
1171 wrap_help (help, opt, len, columns);
1177 unsigned int langs = include_flags & CL_LANG_ALL;
1180 printf (_(" No options with the desired characteristics were found\n"));
1185 /* PR 31349: Tell the user how to see all of the
1186 options supported by a specific front end. */
1187 for (i = 0; (1U << i) < CL_LANG_ALL; i ++)
1188 if ((1U << i) & langs)
1189 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1190 lang_names[i], lang_names[i]);
1194 else if (! displayed)
1195 printf (_(" All options with the desired characteristics have already been displayed\n"));
1200 /* Display help for a specified type of option.
1201 The options must have ALL of the INCLUDE_FLAGS set
1202 ANY of the flags in the ANY_FLAGS set
1203 and NONE of the EXCLUDE_FLAGS set. */
1205 print_specific_help (unsigned int include_flags,
1206 unsigned int exclude_flags,
1207 unsigned int any_flags)
1209 unsigned int all_langs_mask = (1U << cl_lang_count) - 1;
1210 const char * description = NULL;
1211 const char * descrip_extra = "";
1214 static unsigned int columns = 0;
1216 /* Sanity check: Make sure that we do not have more
1217 languages than we have bits available to enumerate them. */
1218 gcc_assert ((1U << cl_lang_count) < CL_MIN_OPTION_CLASS);
1220 /* If we have not done so already, obtain
1221 the desired maximum width of the output. */
1226 GET_ENVIRONMENT (p, "COLUMNS");
1229 int value = atoi (p);
1236 /* Use a reasonable default. */
1240 /* Decide upon the title for the options that we are going to display. */
1241 for (i = 0, flag = 1; flag <= CL_MAX_OPTION_CLASS; flag <<= 1, i ++)
1243 switch (flag & include_flags)
1249 description = _("The following options are target specific");
1252 description = _("The following options control compiler warning messages");
1254 case CL_OPTIMIZATION:
1255 description = _("The following options control optimizations");
1258 description = _("The following options are language-independent");
1261 description = _("The --param option recognizes the following as parameters");
1264 if (i >= cl_lang_count)
1266 if ((exclude_flags & ((1U << cl_lang_count) - 1)) != 0)
1267 description = _("The following options are specific to just the language ");
1269 description = _("The following options are supported by the language ");
1270 descrip_extra = lang_names [i];
1275 if (description == NULL)
1279 if (include_flags == CL_UNDOCUMENTED)
1280 description = _("The following options are not documented");
1283 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1290 if (any_flags & all_langs_mask)
1291 description = _("The following options are language-related");
1293 description = _("The following options are language-independent");
1297 printf ("%s%s:\n", description, descrip_extra);
1298 print_filtered_help (include_flags, exclude_flags, any_flags, columns);
1301 /* Handle target- and language-independent options. Return zero to
1302 generate an "unknown option" message. Only options that need
1303 extra handling need to be listed here; if you simply want
1304 VALUE assigned to a variable, it happens automatically. */
1307 common_handle_option (size_t scode, const char *arg, int value,
1308 unsigned int lang_mask)
1310 static bool verbose = false;
1311 enum opt_code code = (enum opt_code) scode;
1326 unsigned int all_langs_mask = (1U << cl_lang_count) - 1;
1327 unsigned int undoc_mask;
1330 undoc_mask = (verbose | extra_warnings) ? 0 : CL_UNDOCUMENTED;
1331 /* First display any single language specific options. */
1332 for (i = 0; i < cl_lang_count; i++)
1334 (1U << i, (all_langs_mask & (~ (1U << i))) | undoc_mask, 0);
1335 /* Next display any multi language specific options. */
1336 print_specific_help (0, undoc_mask, all_langs_mask);
1337 /* Then display any remaining, non-language options. */
1338 for (i = CL_MIN_OPTION_CLASS; i <= CL_MAX_OPTION_CLASS; i <<= 1)
1339 print_specific_help (i, undoc_mask, 0);
1340 exit_after_options = true;
1344 case OPT_ftarget_help:
1345 case OPT__target_help:
1346 print_specific_help (CL_TARGET, CL_UNDOCUMENTED, 0);
1347 exit_after_options = true;
1349 /* Allow the target a chance to give the user some additional information. */
1350 if (targetm.target_help)
1351 targetm.target_help ();
1357 const char * a = arg;
1358 unsigned int include_flags = 0;
1359 /* Note - by default we include undocumented options when listing
1360 specific classes. If you only want to see documented options
1361 then add ",^undocumented" to the --help= option. e.g.:
1363 --help=target,^undocumented */
1364 unsigned int exclude_flags = 0;
1366 /* Walk along the argument string, parsing each word in turn.
1368 arg = [^]{word}[,{arg}]
1369 word = {optimizers|target|warnings|undocumented|
1370 params|common|<language>} */
1375 const char * string;
1380 { "optimizers", CL_OPTIMIZATION },
1381 { "target", CL_TARGET },
1382 { "warnings", CL_WARNING },
1383 { "undocumented", CL_UNDOCUMENTED },
1384 { "params", CL_PARAMS },
1385 { "joined", CL_JOINED },
1386 { "separate", CL_SEPARATE },
1387 { "common", CL_COMMON },
1390 unsigned int * pflags;
1392 unsigned int lang_flag, specific_flag;
1399 pflags = & exclude_flags;
1402 pflags = & include_flags;
1404 comma = strchr (a, ',');
1410 /* Check to see if the string matches an option class name. */
1411 for (i = 0, specific_flag = 0; specifics[i].string != NULL; i++)
1412 if (strncasecmp (a, specifics[i].string, len) == 0)
1414 specific_flag = specifics[i].flag;
1418 /* Check to see if the string matches a language name.
1419 Note - we rely upon the alpha-sorted nature of the entries in
1420 the lang_names array, specifically that shorter names appear
1421 before their longer variants. (ie C before C++). That way
1422 when we are attempting to match --help=c for example we will
1423 match with C first and not C++. */
1424 for (i = 0, lang_flag = 0; i < cl_lang_count; i++)
1425 if (strncasecmp (a, lang_names[i], len) == 0)
1427 lang_flag = 1U << i;
1431 if (specific_flag != 0)
1434 * pflags |= specific_flag;
1437 /* The option's argument matches both the start of a
1438 language name and the start of an option class name.
1439 We have a special case for when the user has
1440 specified "--help=c", but otherwise we have to issue
1442 if (strncasecmp (a, "c", len) == 0)
1443 * pflags |= lang_flag;
1446 "warning: --help argument %.*s is ambiguous, please be more specific\n",
1450 else if (lang_flag != 0)
1451 * pflags |= lang_flag;
1454 "warning: unrecognized argument to --help= option: %.*s\n",
1463 print_specific_help (include_flags, exclude_flags, 0);
1464 exit_after_options = true;
1469 print_version (stderr, "");
1470 exit_after_options = true;
1474 g_switch_value = value;
1475 g_switch_set = true;
1480 /* Currently handled in a prescan. */
1484 /* For backward compatibility, -W is the same as -Wextra. */
1489 enable_warning_as_error (arg, value, lang_mask);
1496 case OPT_Wlarger_than_:
1497 larger_than_size = value;
1498 warn_larger_than = value != -1;
1501 case OPT_Wstrict_aliasing:
1502 set_Wstrict_aliasing (value);
1505 case OPT_Wstrict_aliasing_:
1506 warn_strict_aliasing = value;
1509 case OPT_Wstrict_overflow:
1510 warn_strict_overflow = (value
1511 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1515 case OPT_Wstrict_overflow_:
1516 warn_strict_overflow = value;
1520 set_Wunused (value);
1525 aux_info_file_name = arg;
1526 flag_gen_aux_info = 1;
1530 aux_base_name = arg;
1533 case OPT_auxbase_strip:
1535 char *tmp = xstrdup (arg);
1536 strip_off_ending (tmp, strlen (tmp));
1538 aux_base_name = tmp;
1543 decode_d_option (arg);
1547 dump_base_name = arg;
1550 case OPT_falign_functions_:
1551 align_functions = value;
1554 case OPT_falign_jumps_:
1555 align_jumps = value;
1558 case OPT_falign_labels_:
1559 align_labels = value;
1562 case OPT_falign_loops_:
1563 align_loops = value;
1566 case OPT_fbranch_probabilities:
1567 flag_branch_probabilities_set = true;
1570 case OPT_fcall_used_:
1571 fix_register (arg, 0, 1);
1574 case OPT_fcall_saved_:
1575 fix_register (arg, 0, 0);
1579 dbg_cnt_process_opt (arg);
1582 case OPT_fdbg_cnt_list:
1583 dbg_cnt_list_all_counters ();
1586 case OPT_fdebug_prefix_map_:
1587 add_debug_prefix_map (arg);
1590 case OPT_fdiagnostics_show_location_:
1591 if (!strcmp (arg, "once"))
1592 diagnostic_prefixing_rule (global_dc) = DIAGNOSTICS_SHOW_PREFIX_ONCE;
1593 else if (!strcmp (arg, "every-line"))
1594 diagnostic_prefixing_rule (global_dc)
1595 = DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE;
1600 case OPT_fdiagnostics_show_option:
1601 global_dc->show_option_requested = true;
1605 if (!dump_switch_p (arg))
1609 case OPT_ffast_math:
1610 set_fast_math_flags (value);
1613 case OPT_funsafe_math_optimizations:
1614 set_unsafe_math_optimizations_flags (value);
1618 fix_register (arg, 1, 1);
1621 case OPT_finline_limit_:
1622 case OPT_finline_limit_eq:
1623 set_param_value ("max-inline-insns-single", value / 2);
1624 set_param_value ("max-inline-insns-auto", value / 2);
1627 case OPT_finstrument_functions_exclude_function_list_:
1628 add_instrument_functions_exclude_list
1629 (&flag_instrument_functions_exclude_functions, arg);
1632 case OPT_finstrument_functions_exclude_file_list_:
1633 add_instrument_functions_exclude_list
1634 (&flag_instrument_functions_exclude_files, arg);
1637 case OPT_fmessage_length_:
1638 pp_set_line_maximum_length (global_dc->printer, value);
1641 case OPT_fpack_struct_:
1642 if (value <= 0 || (value & (value - 1)) || value > 16)
1643 error ("structure alignment must be a small power of two, not %d", value);
1646 initial_max_fld_align = value;
1647 maximum_field_alignment = value * BITS_PER_UNIT;
1651 case OPT_fpeel_loops:
1652 flag_peel_loops_set = true;
1655 case OPT_fprofile_arcs:
1656 profile_arc_flag_set = true;
1659 case OPT_finline_functions:
1660 flag_inline_functions_set = true;
1663 case OPT_fprofile_use:
1664 if (!flag_branch_probabilities_set)
1665 flag_branch_probabilities = value;
1666 if (!flag_profile_values_set)
1667 flag_profile_values = value;
1668 if (!flag_unroll_loops_set)
1669 flag_unroll_loops = value;
1670 if (!flag_peel_loops_set)
1671 flag_peel_loops = value;
1672 if (!flag_tracer_set)
1673 flag_tracer = value;
1674 if (!flag_value_profile_transformations_set)
1675 flag_value_profile_transformations = value;
1676 if (!flag_inline_functions_set)
1677 flag_inline_functions = value;
1680 case OPT_fprofile_generate:
1681 if (!profile_arc_flag_set)
1682 profile_arc_flag = value;
1683 if (!flag_profile_values_set)
1684 flag_profile_values = value;
1685 if (!flag_value_profile_transformations_set)
1686 flag_value_profile_transformations = value;
1687 if (!flag_inline_functions_set)
1688 flag_inline_functions = value;
1691 case OPT_fprofile_values:
1692 flag_profile_values_set = true;
1695 case OPT_fvisibility_:
1697 if (!strcmp(arg, "default"))
1698 default_visibility = VISIBILITY_DEFAULT;
1699 else if (!strcmp(arg, "internal"))
1700 default_visibility = VISIBILITY_INTERNAL;
1701 else if (!strcmp(arg, "hidden"))
1702 default_visibility = VISIBILITY_HIDDEN;
1703 else if (!strcmp(arg, "protected"))
1704 default_visibility = VISIBILITY_PROTECTED;
1706 error ("unrecognized visibility value \"%s\"", arg);
1711 flag_value_profile_transformations_set = true;
1714 case OPT_frandom_seed:
1715 /* The real switch is -fno-random-seed. */
1718 set_random_seed (NULL);
1721 case OPT_frandom_seed_:
1722 set_random_seed (arg);
1725 case OPT_fsched_verbose_:
1726 #ifdef INSN_SCHEDULING
1727 fix_sched_param ("verbose", arg);
1733 case OPT_fsched_stalled_insns_:
1734 flag_sched_stalled_insns = value;
1735 if (flag_sched_stalled_insns == 0)
1736 flag_sched_stalled_insns = -1;
1739 case OPT_fsched_stalled_insns_dep_:
1740 flag_sched_stalled_insns_dep = value;
1743 case OPT_fstack_limit:
1744 /* The real switch is -fno-stack-limit. */
1747 stack_limit_rtx = NULL_RTX;
1750 case OPT_fstack_limit_register_:
1752 int reg = decode_reg_name (arg);
1754 error ("unrecognized register name \"%s\"", arg);
1756 stack_limit_rtx = gen_rtx_REG (Pmode, reg);
1760 case OPT_fstack_limit_symbol_:
1761 stack_limit_rtx = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (arg));
1764 case OPT_ftree_vectorizer_verbose_:
1765 vect_set_verbosity_level (arg);
1768 case OPT_ftls_model_:
1769 if (!strcmp (arg, "global-dynamic"))
1770 flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC;
1771 else if (!strcmp (arg, "local-dynamic"))
1772 flag_tls_default = TLS_MODEL_LOCAL_DYNAMIC;
1773 else if (!strcmp (arg, "initial-exec"))
1774 flag_tls_default = TLS_MODEL_INITIAL_EXEC;
1775 else if (!strcmp (arg, "local-exec"))
1776 flag_tls_default = TLS_MODEL_LOCAL_EXEC;
1778 warning (0, "unknown tls-model \"%s\"", arg);
1782 flag_tracer_set = true;
1785 case OPT_funroll_loops:
1786 flag_unroll_loops_set = true;
1790 set_debug_level (NO_DEBUG, DEFAULT_GDB_EXTENSIONS, arg);
1794 set_debug_level (SDB_DEBUG, false, arg);
1798 set_debug_level (DWARF2_DEBUG, false, arg);
1802 set_debug_level (NO_DEBUG, 2, arg);
1807 set_debug_level (DBX_DEBUG, code == OPT_gstabs_, arg);
1811 set_debug_level (VMS_DEBUG, false, arg);
1816 set_debug_level (XCOFF_DEBUG, code == OPT_gxcoff_, arg);
1820 asm_file_name = arg;
1823 case OPT_pedantic_errors:
1824 flag_pedantic_errors = pedantic = 1;
1827 case OPT_floop_optimize:
1828 case OPT_frerun_loop_opt:
1829 case OPT_fstrength_reduce:
1830 case OPT_ftree_store_copy_prop:
1831 case OPT_fforce_addr:
1832 /* These are no-ops, preserved for backward compatibility. */
1836 /* If the flag was handled in a standard way, assume the lack of
1837 processing here is intentional. */
1838 gcc_assert (cl_options[scode].flag_var);
1845 /* Handle --param NAME=VALUE. */
1847 handle_param (const char *carg)
1852 arg = xstrdup (carg);
1853 equal = strchr (arg, '=');
1855 error ("%s: --param arguments should be of the form NAME=VALUE", arg);
1858 value = integral_argument (equal + 1);
1860 error ("invalid --param value %qs", equal + 1);
1864 set_param_value (arg, value);
1871 /* Handle -W and -Wextra. */
1873 set_Wextra (int setting)
1875 extra_warnings = setting;
1876 warn_unused_parameter = (setting && maybe_warn_unused_parameter);
1878 /* We save the value of warn_uninitialized, since if they put
1879 -Wuninitialized on the command line, we need to generate a
1880 warning about not using it without also specifying -O. */
1882 warn_uninitialized = 0;
1883 else if (warn_uninitialized != 1)
1884 warn_uninitialized = 2;
1887 /* Initialize unused warning flags. */
1889 set_Wunused (int setting)
1891 warn_unused_function = setting;
1892 warn_unused_label = setting;
1893 /* Unused function parameter warnings are reported when either
1894 ``-Wextra -Wunused'' or ``-Wunused-parameter'' is specified.
1895 Thus, if -Wextra has already been seen, set warn_unused_parameter;
1896 otherwise set maybe_warn_extra_parameter, which will be picked up
1898 maybe_warn_unused_parameter = setting;
1899 warn_unused_parameter = (setting && extra_warnings);
1900 warn_unused_variable = setting;
1901 warn_unused_value = setting;
1904 /* Used to set the level of strict aliasing warnings,
1905 when no level is specified (i.e., when -Wstrict-aliasing, and not
1906 -Wstrict-aliasing=level was given).
1907 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
1908 and 0 otherwise. After calling this function, wstrict_aliasing will be
1909 set to the default value of -Wstrict_aliasing=level, currently 3. */
1911 set_Wstrict_aliasing (int onoff)
1913 gcc_assert (onoff == 0 || onoff == 1);
1915 warn_strict_aliasing = 3;
1918 /* The following routines are useful in setting all the flags that
1919 -ffast-math and -fno-fast-math imply. */
1921 set_fast_math_flags (int set)
1923 flag_unsafe_math_optimizations = set;
1924 set_unsafe_math_optimizations_flags (set);
1925 flag_finite_math_only = set;
1926 flag_errno_math = !set;
1929 flag_signaling_nans = 0;
1930 flag_rounding_math = 0;
1931 flag_cx_limited_range = 1;
1935 /* When -funsafe-math-optimizations is set the following
1936 flags are set as well. */
1938 set_unsafe_math_optimizations_flags (int set)
1940 flag_trapping_math = !set;
1941 flag_signed_zeros = !set;
1942 flag_associative_math = set;
1943 flag_reciprocal_math = set;
1946 /* Return true iff flags are set as if -ffast-math. */
1948 fast_math_flags_set_p (void)
1950 return (!flag_trapping_math
1951 && flag_unsafe_math_optimizations
1952 && flag_finite_math_only
1953 && !flag_signed_zeros
1954 && !flag_errno_math);
1957 /* Handle a debug output -g switch. EXTENDED is true or false to support
1958 extended output (2 is special and means "-ggdb" was given). */
1960 set_debug_level (enum debug_info_type type, int extended, const char *arg)
1962 static bool type_explicit;
1964 use_gnu_debug_info_extensions = extended;
1966 if (type == NO_DEBUG)
1968 if (write_symbols == NO_DEBUG)
1970 write_symbols = PREFERRED_DEBUGGING_TYPE;
1974 #ifdef DWARF2_DEBUGGING_INFO
1975 write_symbols = DWARF2_DEBUG;
1976 #elif defined DBX_DEBUGGING_INFO
1977 write_symbols = DBX_DEBUG;
1981 if (write_symbols == NO_DEBUG)
1982 warning (0, "target system does not support debug output");
1987 /* Does it conflict with an already selected type? */
1988 if (type_explicit && write_symbols != NO_DEBUG && type != write_symbols)
1989 error ("debug format \"%s\" conflicts with prior selection",
1990 debug_type_names[type]);
1991 write_symbols = type;
1992 type_explicit = true;
1995 /* A debug flag without a level defaults to level 2. */
1998 if (!debug_info_level)
1999 debug_info_level = 2;
2003 debug_info_level = integral_argument (arg);
2004 if (debug_info_level == (unsigned int) -1)
2005 error ("unrecognised debug output level \"%s\"", arg);
2006 else if (debug_info_level > 3)
2007 error ("debug output level %s is too high", arg);
2011 /* Return 1 if OPTION is enabled, 0 if it is disabled, or -1 if it isn't
2012 a simple on-off switch. */
2015 option_enabled (int opt_idx)
2017 const struct cl_option *option = &(cl_options[opt_idx]);
2019 if (option->flag_var)
2020 switch (option->var_type)
2023 return *(int *) option->flag_var != 0;
2026 return *(int *) option->flag_var == option->var_value;
2028 case CLVC_BIT_CLEAR:
2029 return (*(int *) option->flag_var & option->var_value) == 0;
2032 return (*(int *) option->flag_var & option->var_value) != 0;
2040 /* Fill STATE with the current state of option OPTION. Return true if
2041 there is some state to store. */
2044 get_option_state (int option, struct cl_option_state *state)
2046 if (cl_options[option].flag_var == 0)
2049 switch (cl_options[option].var_type)
2053 state->data = cl_options[option].flag_var;
2054 state->size = sizeof (int);
2057 case CLVC_BIT_CLEAR:
2059 state->ch = option_enabled (option);
2060 state->data = &state->ch;
2065 state->data = *(const char **) cl_options[option].flag_var;
2066 if (state->data == 0)
2068 state->size = strlen (state->data) + 1;
2074 /* Enable a warning option as an error. This is used by -Werror= and
2075 also by legacy Werror-implicit-function-declaration. */
2078 enable_warning_as_error (const char *arg, int value, unsigned int lang_mask)
2083 new_option = XNEWVEC (char, strlen (arg) + 2);
2084 new_option[0] = 'W';
2085 strcpy (new_option + 1, arg);
2086 option_index = find_opt (new_option, lang_mask);
2087 if (option_index == N_OPTS)
2089 error ("-Werror=%s: No option -%s", arg, new_option);
2093 int kind = value ? DK_ERROR : DK_WARNING;
2094 diagnostic_classify_diagnostic (global_dc, option_index, kind);
2096 /* -Werror=foo implies -Wfoo. */
2097 if (cl_options[option_index].var_type == CLVC_BOOLEAN
2098 && cl_options[option_index].flag_var
2099 && kind == DK_ERROR)
2100 *(int *) cl_options[option_index].flag_var = 1;