1 /* Command line option handling.
2 Copyright (C) 2002-2014 Free Software Foundation, Inc.
3 Contributed by Neil Booth.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
24 #include "coretypes.h"
27 #include "tm.h" /* For STACK_CHECK_BUILTIN,
28 STACK_CHECK_STATIC_BUILTIN, DEFAULT_GDB_EXTENSIONS,
29 DWARF2_DEBUGGING_INFO and DBX_DEBUGGING_INFO. */
32 #include "diagnostic.h"
33 #include "diagnostic-color.h"
34 #include "opts-diagnostic.h"
35 #include "insn-attr-common.h"
36 #include "common/common-target.h"
38 static void set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
);
40 /* Indexed by enum debug_info_type. */
41 const char *const debug_type_names
[] =
43 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
46 /* Parse the -femit-struct-debug-detailed option value
47 and set the flag variables. */
49 #define MATCH( prefix, string ) \
50 ((strncmp (prefix, string, sizeof prefix - 1) == 0) \
51 ? ((string += sizeof prefix - 1), 1) : 0)
54 set_struct_debug_option (struct gcc_options
*opts
, location_t loc
,
57 /* various labels for comparison */
58 static const char dfn_lbl
[] = "dfn:", dir_lbl
[] = "dir:", ind_lbl
[] = "ind:";
59 static const char ord_lbl
[] = "ord:", gen_lbl
[] = "gen:";
60 static const char none_lbl
[] = "none", any_lbl
[] = "any";
61 static const char base_lbl
[] = "base", sys_lbl
[] = "sys";
63 enum debug_struct_file files
= DINFO_STRUCT_FILE_ANY
;
64 /* Default is to apply to as much as possible. */
65 enum debug_info_usage usage
= DINFO_USAGE_NUM_ENUMS
;
69 if (MATCH (dfn_lbl
, spec
))
70 usage
= DINFO_USAGE_DFN
;
71 else if (MATCH (dir_lbl
, spec
))
72 usage
= DINFO_USAGE_DIR_USE
;
73 else if (MATCH (ind_lbl
, spec
))
74 usage
= DINFO_USAGE_IND_USE
;
76 /* Generics or not? */
77 if (MATCH (ord_lbl
, spec
))
79 else if (MATCH (gen_lbl
, spec
))
82 /* What allowable environment? */
83 if (MATCH (none_lbl
, spec
))
84 files
= DINFO_STRUCT_FILE_NONE
;
85 else if (MATCH (any_lbl
, spec
))
86 files
= DINFO_STRUCT_FILE_ANY
;
87 else if (MATCH (sys_lbl
, spec
))
88 files
= DINFO_STRUCT_FILE_SYS
;
89 else if (MATCH (base_lbl
, spec
))
90 files
= DINFO_STRUCT_FILE_BASE
;
93 "argument %qs to %<-femit-struct-debug-detailed%> "
97 /* Effect the specification. */
98 if (usage
== DINFO_USAGE_NUM_ENUMS
)
102 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DFN
] = files
;
103 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
] = files
;
104 opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
] = files
;
108 opts
->x_debug_struct_generic
[DINFO_USAGE_DFN
] = files
;
109 opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
] = files
;
110 opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
] = files
;
116 opts
->x_debug_struct_ordinary
[usage
] = files
;
118 opts
->x_debug_struct_generic
[usage
] = files
;
122 set_struct_debug_option (opts
, loc
, spec
+1);
125 /* No more -femit-struct-debug-detailed specifications.
129 "argument %qs to %<-femit-struct-debug-detailed%> unknown",
131 if (opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
]
132 < opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
]
133 || opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
]
134 < opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
])
136 "%<-femit-struct-debug-detailed=dir:...%> must allow "
137 "at least as much as "
138 "%<-femit-struct-debug-detailed=ind:...%>");
142 /* Strip off a legitimate source ending from the input string NAME of
143 length LEN. Rather than having to know the names used by all of
144 our front ends, we strip off an ending of a period followed by
145 up to five characters. (Java uses ".class".) */
148 strip_off_ending (char *name
, int len
)
151 for (i
= 2; i
< 6 && len
> i
; i
++)
153 if (name
[len
- i
] == '.')
155 name
[len
- i
] = '\0';
161 /* Find the base name of a path, stripping off both directories and
162 a single final extension. */
164 base_of_path (const char *path
, const char **base_out
)
166 const char *base
= path
;
168 const char *p
= path
;
172 if (IS_DIR_SEPARATOR (c
))
187 /* What to print when a switch has no documentation. */
188 static const char undocumented_msg
[] = N_("This switch lacks documentation");
190 typedef char *char_p
; /* For DEF_VEC_P. */
192 static void handle_param (struct gcc_options
*opts
,
193 struct gcc_options
*opts_set
, location_t loc
,
195 static void set_debug_level (enum debug_info_type type
, int extended
,
196 const char *arg
, struct gcc_options
*opts
,
197 struct gcc_options
*opts_set
,
199 static void set_fast_math_flags (struct gcc_options
*opts
, int set
);
200 static void decode_d_option (const char *arg
, struct gcc_options
*opts
,
201 location_t loc
, diagnostic_context
*dc
);
202 static void set_unsafe_math_optimizations_flags (struct gcc_options
*opts
,
204 static void enable_warning_as_error (const char *arg
, int value
,
205 unsigned int lang_mask
,
206 const struct cl_option_handlers
*handlers
,
207 struct gcc_options
*opts
,
208 struct gcc_options
*opts_set
,
210 diagnostic_context
*dc
);
212 /* Handle a back-end option; arguments and return value as for
216 target_handle_option (struct gcc_options
*opts
,
217 struct gcc_options
*opts_set
,
218 const struct cl_decoded_option
*decoded
,
219 unsigned int lang_mask ATTRIBUTE_UNUSED
, int kind
,
221 const struct cl_option_handlers
*handlers ATTRIBUTE_UNUSED
,
222 diagnostic_context
*dc
)
224 gcc_assert (dc
== global_dc
);
225 gcc_assert (kind
== DK_UNSPECIFIED
);
226 return targetm_common
.handle_option (opts
, opts_set
, decoded
, loc
);
229 /* Add comma-separated strings to a char_p vector. */
232 add_comma_separated_to_vector (void **pvec
, const char *arg
)
238 vec
<char_p
> *v
= (vec
<char_p
> *) *pvec
;
240 vec_check_alloc (v
, 1);
242 /* We never free this string. */
255 v
->safe_push (token_start
);
258 if (*r
== '\\' && r
[1] == ',')
266 if (*token_start
!= '\0')
267 v
->safe_push (token_start
);
272 /* Initialize OPTS and OPTS_SET before using them in parsing options. */
275 init_options_struct (struct gcc_options
*opts
, struct gcc_options
*opts_set
)
277 size_t num_params
= get_num_compiler_params ();
279 gcc_obstack_init (&opts_obstack
);
281 *opts
= global_options_init
;
284 memset (opts_set
, 0, sizeof (*opts_set
));
286 opts
->x_param_values
= XNEWVEC (int, num_params
);
289 opts_set
->x_param_values
= XCNEWVEC (int, num_params
);
291 init_param_values (opts
->x_param_values
);
293 /* Initialize whether `char' is signed. */
294 opts
->x_flag_signed_char
= DEFAULT_SIGNED_CHAR
;
295 /* Set this to a special "uninitialized" value. The actual default
296 is set after target options have been processed. */
297 opts
->x_flag_short_enums
= 2;
299 /* Initialize target_flags before default_options_optimization
300 so the latter can modify it. */
301 opts
->x_target_flags
= targetm_common
.default_target_flags
;
303 /* Some targets have ABI-specified unwind tables. */
304 opts
->x_flag_unwind_tables
= targetm_common
.unwind_tables_default
;
306 /* Some targets have other target-specific initialization. */
307 targetm_common
.option_init_struct (opts
);
310 /* If indicated by the optimization level LEVEL (-Os if SIZE is set,
311 -Ofast if FAST is set, -Og if DEBUG is set), apply the option DEFAULT_OPT
312 to OPTS and OPTS_SET, diagnostic context DC, location LOC, with language
313 mask LANG_MASK and option handlers HANDLERS. */
316 maybe_default_option (struct gcc_options
*opts
,
317 struct gcc_options
*opts_set
,
318 const struct default_options
*default_opt
,
319 int level
, bool size
, bool fast
, bool debug
,
320 unsigned int lang_mask
,
321 const struct cl_option_handlers
*handlers
,
323 diagnostic_context
*dc
)
325 const struct cl_option
*option
= &cl_options
[default_opt
->opt_index
];
329 gcc_assert (level
== 2);
331 gcc_assert (level
== 3);
333 gcc_assert (level
== 1);
335 switch (default_opt
->levels
)
341 case OPT_LEVELS_0_ONLY
:
342 enabled
= (level
== 0);
345 case OPT_LEVELS_1_PLUS
:
346 enabled
= (level
>= 1);
349 case OPT_LEVELS_1_PLUS_SPEED_ONLY
:
350 enabled
= (level
>= 1 && !size
&& !debug
);
353 case OPT_LEVELS_1_PLUS_NOT_DEBUG
:
354 enabled
= (level
>= 1 && !debug
);
357 case OPT_LEVELS_2_PLUS
:
358 enabled
= (level
>= 2);
361 case OPT_LEVELS_2_PLUS_SPEED_ONLY
:
362 enabled
= (level
>= 2 && !size
&& !debug
);
365 case OPT_LEVELS_3_PLUS
:
366 enabled
= (level
>= 3);
369 case OPT_LEVELS_3_PLUS_AND_SIZE
:
370 enabled
= (level
>= 3 || size
);
373 case OPT_LEVELS_SIZE
:
377 case OPT_LEVELS_FAST
:
381 case OPT_LEVELS_NONE
:
387 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
388 default_opt
->arg
, default_opt
->value
,
389 lang_mask
, DK_UNSPECIFIED
, loc
,
391 else if (default_opt
->arg
== NULL
392 && !option
->cl_reject_negative
)
393 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
394 default_opt
->arg
, !default_opt
->value
,
395 lang_mask
, DK_UNSPECIFIED
, loc
,
399 /* As indicated by the optimization level LEVEL (-Os if SIZE is set,
400 -Ofast if FAST is set), apply the options in array DEFAULT_OPTS to
401 OPTS and OPTS_SET, diagnostic context DC, location LOC, with
402 language mask LANG_MASK and option handlers HANDLERS. */
405 maybe_default_options (struct gcc_options
*opts
,
406 struct gcc_options
*opts_set
,
407 const struct default_options
*default_opts
,
408 int level
, bool size
, bool fast
, bool debug
,
409 unsigned int lang_mask
,
410 const struct cl_option_handlers
*handlers
,
412 diagnostic_context
*dc
)
416 for (i
= 0; default_opts
[i
].levels
!= OPT_LEVELS_NONE
; i
++)
417 maybe_default_option (opts
, opts_set
, &default_opts
[i
],
418 level
, size
, fast
, debug
,
419 lang_mask
, handlers
, loc
, dc
);
422 /* Table of options enabled by default at different levels. */
424 static const struct default_options default_options_table
[] =
426 /* -O1 optimizations. */
427 { OPT_LEVELS_1_PLUS
, OPT_fdefer_pop
, NULL
, 1 },
429 { OPT_LEVELS_1_PLUS
, OPT_fdelayed_branch
, NULL
, 1 },
431 { OPT_LEVELS_1_PLUS
, OPT_fguess_branch_probability
, NULL
, 1 },
432 { OPT_LEVELS_1_PLUS
, OPT_fcprop_registers
, NULL
, 1 },
433 { OPT_LEVELS_1_PLUS
, OPT_fforward_propagate
, NULL
, 1 },
434 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fif_conversion
, NULL
, 1 },
435 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fif_conversion2
, NULL
, 1 },
436 { OPT_LEVELS_1_PLUS
, OPT_fipa_pure_const
, NULL
, 1 },
437 { OPT_LEVELS_1_PLUS
, OPT_fipa_reference
, NULL
, 1 },
438 { OPT_LEVELS_1_PLUS
, OPT_fipa_profile
, NULL
, 1 },
439 { OPT_LEVELS_1_PLUS
, OPT_fmerge_constants
, NULL
, 1 },
440 { OPT_LEVELS_1_PLUS
, OPT_fshrink_wrap
, NULL
, 1 },
441 { OPT_LEVELS_1_PLUS
, OPT_fsplit_wide_types
, NULL
, 1 },
442 { OPT_LEVELS_1_PLUS
, OPT_ftree_ccp
, NULL
, 1 },
443 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_ftree_bit_ccp
, NULL
, 1 },
444 { OPT_LEVELS_1_PLUS
, OPT_ftree_dce
, NULL
, 1 },
445 { OPT_LEVELS_1_PLUS
, OPT_ftree_dominator_opts
, NULL
, 1 },
446 { OPT_LEVELS_1_PLUS
, OPT_ftree_dse
, NULL
, 1 },
447 { OPT_LEVELS_1_PLUS
, OPT_ftree_ter
, NULL
, 1 },
448 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_ftree_sra
, NULL
, 1 },
449 { OPT_LEVELS_1_PLUS
, OPT_ftree_copyrename
, NULL
, 1 },
450 { OPT_LEVELS_1_PLUS
, OPT_ftree_fre
, NULL
, 1 },
451 { OPT_LEVELS_1_PLUS
, OPT_ftree_copy_prop
, NULL
, 1 },
452 { OPT_LEVELS_1_PLUS
, OPT_ftree_sink
, NULL
, 1 },
453 { OPT_LEVELS_1_PLUS
, OPT_ftree_ch
, NULL
, 1 },
454 { OPT_LEVELS_1_PLUS
, OPT_fcombine_stack_adjustments
, NULL
, 1 },
455 { OPT_LEVELS_1_PLUS
, OPT_fcompare_elim
, NULL
, 1 },
456 { OPT_LEVELS_1_PLUS
, OPT_ftree_slsr
, NULL
, 1 },
457 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fbranch_count_reg
, NULL
, 1 },
458 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fmove_loop_invariants
, NULL
, 1 },
459 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_ftree_pta
, NULL
, 1 },
460 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fssa_phiopt
, NULL
, 1 },
462 /* -O2 optimizations. */
463 { OPT_LEVELS_2_PLUS
, OPT_finline_small_functions
, NULL
, 1 },
464 { OPT_LEVELS_2_PLUS
, OPT_findirect_inlining
, NULL
, 1 },
465 { OPT_LEVELS_2_PLUS
, OPT_fpartial_inlining
, NULL
, 1 },
466 { OPT_LEVELS_2_PLUS
, OPT_fthread_jumps
, NULL
, 1 },
467 { OPT_LEVELS_2_PLUS
, OPT_fcrossjumping
, NULL
, 1 },
468 { OPT_LEVELS_2_PLUS
, OPT_foptimize_sibling_calls
, NULL
, 1 },
469 { OPT_LEVELS_2_PLUS
, OPT_fcse_follow_jumps
, NULL
, 1 },
470 { OPT_LEVELS_2_PLUS
, OPT_fgcse
, NULL
, 1 },
471 { OPT_LEVELS_2_PLUS
, OPT_fexpensive_optimizations
, NULL
, 1 },
472 { OPT_LEVELS_2_PLUS
, OPT_frerun_cse_after_loop
, NULL
, 1 },
473 { OPT_LEVELS_2_PLUS
, OPT_fcaller_saves
, NULL
, 1 },
474 { OPT_LEVELS_2_PLUS
, OPT_fpeephole2
, NULL
, 1 },
475 #ifdef INSN_SCHEDULING
476 /* Only run the pre-regalloc scheduling pass if optimizing for speed. */
477 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_fschedule_insns
, NULL
, 1 },
478 { OPT_LEVELS_2_PLUS
, OPT_fschedule_insns2
, NULL
, 1 },
480 { OPT_LEVELS_2_PLUS
, OPT_fstrict_aliasing
, NULL
, 1 },
481 { OPT_LEVELS_2_PLUS
, OPT_fstrict_overflow
, NULL
, 1 },
482 { OPT_LEVELS_2_PLUS
, OPT_freorder_blocks
, NULL
, 1 },
483 { OPT_LEVELS_2_PLUS
, OPT_freorder_functions
, NULL
, 1 },
484 { OPT_LEVELS_2_PLUS
, OPT_ftree_vrp
, NULL
, 1 },
485 { OPT_LEVELS_2_PLUS
, OPT_ftree_builtin_call_dce
, NULL
, 1 },
486 { OPT_LEVELS_2_PLUS
, OPT_ftree_pre
, NULL
, 1 },
487 { OPT_LEVELS_2_PLUS
, OPT_ftree_switch_conversion
, NULL
, 1 },
488 { OPT_LEVELS_2_PLUS
, OPT_fipa_cp
, NULL
, 1 },
489 { OPT_LEVELS_2_PLUS
, OPT_fdevirtualize
, NULL
, 1 },
490 { OPT_LEVELS_2_PLUS
, OPT_fdevirtualize_speculatively
, NULL
, 1 },
491 { OPT_LEVELS_2_PLUS
, OPT_fipa_sra
, NULL
, 1 },
492 { OPT_LEVELS_2_PLUS
, OPT_falign_loops
, NULL
, 1 },
493 { OPT_LEVELS_2_PLUS
, OPT_falign_jumps
, NULL
, 1 },
494 { OPT_LEVELS_2_PLUS
, OPT_falign_labels
, NULL
, 1 },
495 { OPT_LEVELS_2_PLUS
, OPT_falign_functions
, NULL
, 1 },
496 { OPT_LEVELS_2_PLUS
, OPT_ftree_tail_merge
, NULL
, 1 },
497 { OPT_LEVELS_2_PLUS
, OPT_fvect_cost_model_
, NULL
, VECT_COST_MODEL_CHEAP
},
498 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_foptimize_strlen
, NULL
, 1 },
499 { OPT_LEVELS_2_PLUS
, OPT_fhoist_adjacent_loads
, NULL
, 1 },
500 { OPT_LEVELS_2_PLUS
, OPT_fisolate_erroneous_paths_dereference
, NULL
, 1 },
501 { OPT_LEVELS_2_PLUS
, OPT_fuse_caller_save
, NULL
, 1 },
503 /* -O3 optimizations. */
504 { OPT_LEVELS_3_PLUS
, OPT_ftree_loop_distribute_patterns
, NULL
, 1 },
505 { OPT_LEVELS_3_PLUS
, OPT_fpredictive_commoning
, NULL
, 1 },
506 /* Inlining of functions reducing size is a good idea with -Os
507 regardless of them being declared inline. */
508 { OPT_LEVELS_3_PLUS_AND_SIZE
, OPT_finline_functions
, NULL
, 1 },
509 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_finline_functions_called_once
, NULL
, 1 },
510 { OPT_LEVELS_3_PLUS
, OPT_funswitch_loops
, NULL
, 1 },
511 { OPT_LEVELS_3_PLUS
, OPT_fgcse_after_reload
, NULL
, 1 },
512 { OPT_LEVELS_2_PLUS
, OPT_ftree_loop_vectorize
, NULL
, 1 },
513 { OPT_LEVELS_3_PLUS
, OPT_ftree_slp_vectorize
, NULL
, 1 },
514 { OPT_LEVELS_3_PLUS
, OPT_fvect_cost_model_
, NULL
, VECT_COST_MODEL_DYNAMIC
},
515 { OPT_LEVELS_3_PLUS
, OPT_fipa_cp_clone
, NULL
, 1 },
516 { OPT_LEVELS_3_PLUS
, OPT_ftree_partial_pre
, NULL
, 1 },
518 /* -Ofast adds optimizations to -O3. */
519 { OPT_LEVELS_FAST
, OPT_ffast_math
, NULL
, 1 },
521 { OPT_LEVELS_NONE
, 0, NULL
, 0 }
524 /* Default the options in OPTS and OPTS_SET based on the optimization
525 settings in DECODED_OPTIONS and DECODED_OPTIONS_COUNT. */
527 default_options_optimization (struct gcc_options
*opts
,
528 struct gcc_options
*opts_set
,
529 struct cl_decoded_option
*decoded_options
,
530 unsigned int decoded_options_count
,
532 unsigned int lang_mask
,
533 const struct cl_option_handlers
*handlers
,
534 diagnostic_context
*dc
)
539 /* Scan to see what optimization level has been specified. That will
540 determine the default value of many flags. */
541 for (i
= 1; i
< decoded_options_count
; i
++)
543 struct cl_decoded_option
*opt
= &decoded_options
[i
];
544 switch (opt
->opt_index
)
547 if (*opt
->arg
== '\0')
549 opts
->x_optimize
= 1;
550 opts
->x_optimize_size
= 0;
551 opts
->x_optimize_fast
= 0;
552 opts
->x_optimize_debug
= 0;
556 const int optimize_val
= integral_argument (opt
->arg
);
557 if (optimize_val
== -1)
558 error_at (loc
, "argument to %<-O%> should be a non-negative "
559 "integer, %<g%>, %<s%> or %<fast%>");
562 opts
->x_optimize
= optimize_val
;
563 if ((unsigned int) opts
->x_optimize
> 255)
564 opts
->x_optimize
= 255;
565 opts
->x_optimize_size
= 0;
566 opts
->x_optimize_fast
= 0;
567 opts
->x_optimize_debug
= 0;
573 opts
->x_optimize_size
= 1;
575 /* Optimizing for size forces optimize to be 2. */
576 opts
->x_optimize
= 2;
577 opts
->x_optimize_fast
= 0;
578 opts
->x_optimize_debug
= 0;
582 /* -Ofast only adds flags to -O3. */
583 opts
->x_optimize_size
= 0;
584 opts
->x_optimize
= 3;
585 opts
->x_optimize_fast
= 1;
586 opts
->x_optimize_debug
= 0;
590 /* -Og selects optimization level 1. */
591 opts
->x_optimize_size
= 0;
592 opts
->x_optimize
= 1;
593 opts
->x_optimize_fast
= 0;
594 opts
->x_optimize_debug
= 1;
598 /* Ignore other options in this prescan. */
603 maybe_default_options (opts
, opts_set
, default_options_table
,
604 opts
->x_optimize
, opts
->x_optimize_size
,
605 opts
->x_optimize_fast
, opts
->x_optimize_debug
,
606 lang_mask
, handlers
, loc
, dc
);
608 /* -O2 param settings. */
609 opt2
= (opts
->x_optimize
>= 2);
611 /* Track fields in field-sensitive alias analysis. */
612 maybe_set_param_value
613 (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
,
614 opt2
? 100 : default_param_value (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
),
615 opts
->x_param_values
, opts_set
->x_param_values
);
617 /* For -O1 only do loop invariant motion for very small loops. */
618 maybe_set_param_value
619 (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
,
620 opt2
? default_param_value (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
) : 1000,
621 opts
->x_param_values
, opts_set
->x_param_values
);
623 /* At -Ofast, allow store motion to introduce potential race conditions. */
624 maybe_set_param_value
625 (PARAM_ALLOW_STORE_DATA_RACES
,
626 opts
->x_optimize_fast
? 1
627 : default_param_value (PARAM_ALLOW_STORE_DATA_RACES
),
628 opts
->x_param_values
, opts_set
->x_param_values
);
630 if (opts
->x_optimize_size
)
631 /* We want to crossjump as much as possible. */
632 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
, 1,
633 opts
->x_param_values
, opts_set
->x_param_values
);
635 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
,
636 default_param_value (PARAM_MIN_CROSSJUMP_INSNS
),
637 opts
->x_param_values
, opts_set
->x_param_values
);
639 /* Allow default optimizations to be specified on a per-machine basis. */
640 maybe_default_options (opts
, opts_set
,
641 targetm_common
.option_optimization_table
,
642 opts
->x_optimize
, opts
->x_optimize_size
,
643 opts
->x_optimize_fast
, opts
->x_optimize_debug
,
644 lang_mask
, handlers
, loc
, dc
);
647 /* After all options at LOC have been read into OPTS and OPTS_SET,
648 finalize settings of those options and diagnose incompatible
651 finish_options (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
654 enum unwind_info_type ui_except
;
656 if (opts
->x_dump_base_name
657 && ! IS_ABSOLUTE_PATH (opts
->x_dump_base_name
)
658 && ! opts
->x_dump_base_name_prefixed
)
660 /* First try to make OPTS->X_DUMP_BASE_NAME relative to the
661 OPTS->X_DUMP_DIR_NAME directory. Then try to make
662 OPTS->X_DUMP_BASE_NAME relative to the OPTS->X_AUX_BASE_NAME
663 directory, typically the directory to contain the object
665 if (opts
->x_dump_dir_name
)
666 opts
->x_dump_base_name
= opts_concat (opts
->x_dump_dir_name
,
667 opts
->x_dump_base_name
, NULL
);
668 else if (opts
->x_aux_base_name
669 && strcmp (opts
->x_aux_base_name
, HOST_BIT_BUCKET
) != 0)
671 const char *aux_base
;
673 base_of_path (opts
->x_aux_base_name
, &aux_base
);
674 if (opts
->x_aux_base_name
!= aux_base
)
676 int dir_len
= aux_base
- opts
->x_aux_base_name
;
677 char *new_dump_base_name
678 = XOBNEWVEC (&opts_obstack
, char,
679 strlen (opts
->x_dump_base_name
) + dir_len
+ 1);
681 /* Copy directory component from OPTS->X_AUX_BASE_NAME. */
682 memcpy (new_dump_base_name
, opts
->x_aux_base_name
, dir_len
);
683 /* Append existing OPTS->X_DUMP_BASE_NAME. */
684 strcpy (new_dump_base_name
+ dir_len
, opts
->x_dump_base_name
);
685 opts
->x_dump_base_name
= new_dump_base_name
;
688 opts
->x_dump_base_name_prefixed
= true;
691 /* Handle related options for unit-at-a-time, toplevel-reorder, and
693 if (!opts
->x_flag_unit_at_a_time
)
695 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
696 error_at (loc
, "section anchors must be disabled when unit-at-a-time "
698 opts
->x_flag_section_anchors
= 0;
699 if (opts
->x_flag_toplevel_reorder
== 1)
700 error_at (loc
, "toplevel reorder must be disabled when unit-at-a-time "
702 opts
->x_flag_toplevel_reorder
= 0;
705 if (opts
->x_flag_tm
&& opts
->x_flag_non_call_exceptions
)
706 sorry ("transactional memory is not supported with non-call exceptions");
708 /* Unless the user has asked for section anchors, we disable toplevel
709 reordering at -O0 to disable transformations that might be surprising
710 to end users and to get -fno-toplevel-reorder tested. */
711 if (!opts
->x_optimize
712 && opts
->x_flag_toplevel_reorder
== 2
713 && !(opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
))
715 opts
->x_flag_toplevel_reorder
= 0;
716 opts
->x_flag_section_anchors
= 0;
718 if (!opts
->x_flag_toplevel_reorder
)
720 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
721 error_at (loc
, "section anchors must be disabled when toplevel reorder"
723 opts
->x_flag_section_anchors
= 0;
726 if (!opts
->x_flag_opts_finished
)
728 if (opts
->x_flag_pie
)
729 opts
->x_flag_pic
= opts
->x_flag_pie
;
730 if (opts
->x_flag_pic
&& !opts
->x_flag_pie
)
731 opts
->x_flag_shlib
= 1;
732 opts
->x_flag_opts_finished
= true;
735 if (opts
->x_optimize
== 0)
737 /* Inlining does not work if not optimizing,
738 so force it not to be done. */
739 opts
->x_warn_inline
= 0;
740 opts
->x_flag_no_inline
= 1;
743 /* The optimization to partition hot and cold basic blocks into separate
744 sections of the .o and executable files does not work (currently)
745 with exception handling. This is because there is no support for
746 generating unwind info. If opts->x_flag_exceptions is turned on
747 we need to turn off the partitioning optimization. */
749 ui_except
= targetm_common
.except_unwind_info (opts
);
751 if (opts
->x_flag_exceptions
752 && opts
->x_flag_reorder_blocks_and_partition
753 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))
755 if (opts_set
->x_flag_reorder_blocks_and_partition
)
757 "-freorder-blocks-and-partition does not work "
758 "with exceptions on this architecture");
759 opts
->x_flag_reorder_blocks_and_partition
= 0;
760 opts
->x_flag_reorder_blocks
= 1;
763 /* If user requested unwind info, then turn off the partitioning
766 if (opts
->x_flag_unwind_tables
767 && !targetm_common
.unwind_tables_default
768 && opts
->x_flag_reorder_blocks_and_partition
769 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))
771 if (opts_set
->x_flag_reorder_blocks_and_partition
)
773 "-freorder-blocks-and-partition does not support "
774 "unwind info on this architecture");
775 opts
->x_flag_reorder_blocks_and_partition
= 0;
776 opts
->x_flag_reorder_blocks
= 1;
779 /* If the target requested unwind info, then turn off the partitioning
780 optimization with a different message. Likewise, if the target does not
781 support named sections. */
783 if (opts
->x_flag_reorder_blocks_and_partition
784 && (!targetm_common
.have_named_sections
785 || (opts
->x_flag_unwind_tables
786 && targetm_common
.unwind_tables_default
787 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))))
789 if (opts_set
->x_flag_reorder_blocks_and_partition
)
791 "-freorder-blocks-and-partition does not work "
792 "on this architecture");
793 opts
->x_flag_reorder_blocks_and_partition
= 0;
794 opts
->x_flag_reorder_blocks
= 1;
797 if (opts
->x_flag_reorder_blocks_and_partition
798 && !opts_set
->x_flag_reorder_functions
)
799 opts
->x_flag_reorder_functions
= 1;
801 /* Pipelining of outer loops is only possible when general pipelining
802 capabilities are requested. */
803 if (!opts
->x_flag_sel_sched_pipelining
)
804 opts
->x_flag_sel_sched_pipelining_outer_loops
= 0;
806 if (opts
->x_flag_conserve_stack
)
808 maybe_set_param_value (PARAM_LARGE_STACK_FRAME
, 100,
809 opts
->x_param_values
, opts_set
->x_param_values
);
810 maybe_set_param_value (PARAM_STACK_FRAME_GROWTH
, 40,
811 opts
->x_param_values
, opts_set
->x_param_values
);
814 if (opts
->x_flag_lto
)
817 opts
->x_flag_generate_lto
= 1;
819 /* When generating IL, do not operate in whole-program mode.
820 Otherwise, symbols will be privatized too early, causing link
822 opts
->x_flag_whole_program
= 0;
824 error_at (loc
, "LTO support has not been enabled in this configuration");
826 if (!opts
->x_flag_fat_lto_objects
828 || (opts_set
->x_flag_use_linker_plugin
829 && !opts
->x_flag_use_linker_plugin
)))
831 if (opts_set
->x_flag_fat_lto_objects
)
832 error_at (loc
, "-fno-fat-lto-objects are supported only with linker plugin");
833 opts
->x_flag_fat_lto_objects
= 1;
837 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
838 default value if they choose based on other options. */
839 if (opts
->x_flag_split_stack
== -1)
840 opts
->x_flag_split_stack
= 0;
841 else if (opts
->x_flag_split_stack
)
843 if (!targetm_common
.supports_split_stack (true, opts
))
845 error_at (loc
, "%<-fsplit-stack%> is not supported by "
846 "this compiler configuration");
847 opts
->x_flag_split_stack
= 0;
851 if (opts
->x_profile_arc_flag
852 || opts
->x_flag_branch_probabilities
)
854 /* With profile data, inlining is much more selective and makes
855 better decisions, so increase the inlining function size
856 limits. Changes must be added to both the generate and use
857 builds to avoid profile mismatches. */
858 maybe_set_param_value
859 (PARAM_MAX_INLINE_INSNS_SINGLE
, 1000,
860 opts
->x_param_values
, opts_set
->x_param_values
);
861 maybe_set_param_value
862 (PARAM_MAX_INLINE_INSNS_AUTO
, 1000,
863 opts
->x_param_values
, opts_set
->x_param_values
);
866 /* Tune vectorization related parametees according to cost model. */
867 if (opts
->x_flag_vect_cost_model
== VECT_COST_MODEL_CHEAP
)
869 maybe_set_param_value (PARAM_VECT_MAX_VERSION_FOR_ALIAS_CHECKS
,
870 8, opts
->x_param_values
, opts_set
->x_param_values
);
871 maybe_set_param_value (PARAM_VECT_MAX_VERSION_FOR_ALIGNMENT_CHECKS
,
872 0, opts
->x_param_values
, opts_set
->x_param_values
);
873 maybe_set_param_value (PARAM_VECT_MAX_PEELING_FOR_ALIGNMENT
,
874 0, opts
->x_param_values
, opts_set
->x_param_values
);
877 /* Set PARAM_MAX_STORES_TO_SINK to 0 if either vectorization or if-conversion
879 if ((!opts
->x_flag_tree_loop_vectorize
&& !opts
->x_flag_tree_slp_vectorize
)
880 || !opts
->x_flag_tree_loop_if_convert
)
881 maybe_set_param_value (PARAM_MAX_STORES_TO_SINK
, 0,
882 opts
->x_param_values
, opts_set
->x_param_values
);
884 /* The -gsplit-dwarf option requires -ggnu-pubnames. */
885 if (opts
->x_dwarf_split_debug_info
)
886 opts
->x_debug_generate_pub_sections
= 2;
888 /* Turn on -ffunction-sections when -freorder-functions=* is used. */
889 if (opts
->x_flag_reorder_functions
> 1)
890 opts
->x_flag_function_sections
= 1;
892 /* LIPO module grouping depends on the memory consumed by the profile-gen
893 parsing phase, recorded in a per-module ggc_memory field of the module
894 info struct. This will be higher when debug generation is on via
895 -g/-gmlt, which causes the FE to generate debug structures that will
896 increase the ggc_total_memory. This could in theory cause the module
897 groups to be slightly more conservative. Disable -g/-gmlt under
898 -fripa -fprofile-generate, but provide an option to override this
899 in case we actually need to debug an instrumented binary. */
900 if (opts
->x_profile_arc_flag
901 && opts
->x_flag_dyn_ipa
902 && opts
->x_debug_info_level
!= DINFO_LEVEL_NONE
903 && !opts
->x_flag_dyn_ipa_allow_debug
)
906 "Debug generation via -g option disabled under -fripa "
907 "-fprofile-generate (use -fripa-allow-debug to override)");
908 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, "0", opts
, opts_set
,
912 /* Userspace and kernel ASan conflict with each other and with TSan. */
914 if ((flag_sanitize
& SANITIZE_USER_ADDRESS
)
915 && (flag_sanitize
& SANITIZE_KERNEL_ADDRESS
))
917 "-fsanitize=address is incompatible with "
918 "-fsanitize=kernel-address");
920 if ((flag_sanitize
& SANITIZE_ADDRESS
)
921 && (flag_sanitize
& SANITIZE_THREAD
))
923 "-fsanitize=address and -fsanitize=kernel-address "
924 "are incompatible with -fsanitize=thread");
927 #define LEFT_COLUMN 27
929 /* Output ITEM, of length ITEM_WIDTH, in the left column,
930 followed by word-wrapped HELP in a second column. */
932 wrap_help (const char *help
,
934 unsigned int item_width
,
935 unsigned int columns
)
937 unsigned int col_width
= LEFT_COLUMN
;
938 unsigned int remaining
, room
, len
;
940 remaining
= strlen (help
);
944 room
= columns
- 3 - MAX (col_width
, item_width
);
953 for (i
= 0; help
[i
]; i
++)
955 if (i
>= room
&& len
!= remaining
)
959 else if ((help
[i
] == '-' || help
[i
] == '/')
960 && help
[i
+ 1] != ' '
961 && i
> 0 && ISALPHA (help
[i
- 1]))
966 printf (" %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
968 while (help
[len
] == ' ')
976 /* Print help for a specific front-end, etc. */
978 print_filtered_help (unsigned int include_flags
,
979 unsigned int exclude_flags
,
980 unsigned int any_flags
,
981 unsigned int columns
,
982 struct gcc_options
*opts
,
983 unsigned int lang_mask
)
988 bool displayed
= false;
990 if (include_flags
== CL_PARAMS
)
992 for (i
= 0; i
< LAST_PARAM
; i
++)
994 const char *param
= compiler_params
[i
].option
;
996 help
= compiler_params
[i
].help
;
997 if (help
== NULL
|| *help
== '\0')
999 if (exclude_flags
& CL_UNDOCUMENTED
)
1001 help
= undocumented_msg
;
1004 /* Get the translation. */
1007 wrap_help (help
, param
, strlen (param
), columns
);
1013 if (!opts
->x_help_printed
)
1014 opts
->x_help_printed
= XCNEWVAR (char, cl_options_count
);
1016 if (!opts
->x_help_enum_printed
)
1017 opts
->x_help_enum_printed
= XCNEWVAR (char, cl_enums_count
);
1019 for (i
= 0; i
< cl_options_count
; i
++)
1022 const struct cl_option
*option
= cl_options
+ i
;
1027 if (include_flags
== 0
1028 || ((option
->flags
& include_flags
) != include_flags
))
1030 if ((option
->flags
& any_flags
) == 0)
1034 /* Skip unwanted switches. */
1035 if ((option
->flags
& exclude_flags
) != 0)
1038 /* The driver currently prints its own help text. */
1039 if ((option
->flags
& CL_DRIVER
) != 0
1040 && (option
->flags
& (((1U << cl_lang_count
) - 1)
1041 | CL_COMMON
| CL_TARGET
)) == 0)
1045 /* Skip switches that have already been printed. */
1046 if (opts
->x_help_printed
[i
])
1049 opts
->x_help_printed
[i
] = true;
1051 help
= option
->help
;
1054 if (exclude_flags
& CL_UNDOCUMENTED
)
1056 help
= undocumented_msg
;
1059 /* Get the translation. */
1062 /* Find the gap between the name of the
1063 option and its descriptive text. */
1064 tab
= strchr (help
, '\t');
1073 opt
= option
->opt_text
;
1077 /* With the -Q option enabled we change the descriptive text associated
1078 with an option to be an indication of its current setting. */
1079 if (!opts
->x_quiet_flag
)
1081 void *flag_var
= option_flag_var (i
, opts
);
1083 if (len
< (LEFT_COLUMN
+ 2))
1084 strcpy (new_help
, "\t\t");
1086 strcpy (new_help
, "\t");
1088 if (flag_var
!= NULL
1089 && option
->var_type
!= CLVC_DEFER
)
1091 if (option
->flags
& CL_JOINED
)
1093 if (option
->var_type
== CLVC_STRING
)
1095 if (* (const char **) flag_var
!= NULL
)
1096 snprintf (new_help
+ strlen (new_help
),
1097 sizeof (new_help
) - strlen (new_help
),
1098 * (const char **) flag_var
);
1100 else if (option
->var_type
== CLVC_ENUM
)
1102 const struct cl_enum
*e
= &cl_enums
[option
->var_enum
];
1104 const char *arg
= NULL
;
1106 value
= e
->get (flag_var
);
1107 enum_value_to_arg (e
->values
, &arg
, value
, lang_mask
);
1109 arg
= _("[default]");
1110 snprintf (new_help
+ strlen (new_help
),
1111 sizeof (new_help
) - strlen (new_help
),
1115 sprintf (new_help
+ strlen (new_help
),
1116 "%#x", * (int *) flag_var
);
1119 strcat (new_help
, option_enabled (i
, opts
)
1120 ? _("[enabled]") : _("[disabled]"));
1126 wrap_help (help
, opt
, len
, columns
);
1129 if (option
->var_type
== CLVC_ENUM
1130 && opts
->x_help_enum_printed
[option
->var_enum
] != 2)
1131 opts
->x_help_enum_printed
[option
->var_enum
] = 1;
1136 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1139 printf (_(" No options with the desired characteristics were found\n"));
1144 /* PR 31349: Tell the user how to see all of the
1145 options supported by a specific front end. */
1146 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1147 if ((1U << i
) & langs
)
1148 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1149 lang_names
[i
], lang_names
[i
]);
1153 else if (! displayed
)
1154 printf (_(" All options with the desired characteristics have already been displayed\n"));
1158 /* Print details of enumerated option arguments, if those
1159 enumerations have help text headings provided. If no help text
1160 is provided, presume that the possible values are listed in the
1161 help text for the relevant options. */
1162 for (i
= 0; i
< cl_enums_count
; i
++)
1164 unsigned int j
, pos
;
1166 if (opts
->x_help_enum_printed
[i
] != 1)
1168 if (cl_enums
[i
].help
== NULL
)
1170 printf (" %s\n ", _(cl_enums
[i
].help
));
1172 for (j
= 0; cl_enums
[i
].values
[j
].arg
!= NULL
; j
++)
1174 unsigned int len
= strlen (cl_enums
[i
].values
[j
].arg
);
1176 if (pos
> 4 && pos
+ 1 + len
<= columns
)
1178 printf (" %s", cl_enums
[i
].values
[j
].arg
);
1188 printf ("%s", cl_enums
[i
].values
[j
].arg
);
1193 opts
->x_help_enum_printed
[i
] = 2;
1197 /* Display help for a specified type of option.
1198 The options must have ALL of the INCLUDE_FLAGS set
1199 ANY of the flags in the ANY_FLAGS set
1200 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1201 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1203 print_specific_help (unsigned int include_flags
,
1204 unsigned int exclude_flags
,
1205 unsigned int any_flags
,
1206 struct gcc_options
*opts
,
1207 unsigned int lang_mask
)
1209 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1210 const char * description
= NULL
;
1211 const char * descrip_extra
= "";
1215 /* Sanity check: Make sure that we do not have more
1216 languages than we have bits available to enumerate them. */
1217 gcc_assert ((1U << cl_lang_count
) <= CL_MIN_OPTION_CLASS
);
1219 /* If we have not done so already, obtain
1220 the desired maximum width of the output. */
1221 if (opts
->x_help_columns
== 0)
1225 p
= getenv ("COLUMNS");
1228 int value
= atoi (p
);
1231 opts
->x_help_columns
= value
;
1234 if (opts
->x_help_columns
== 0)
1235 /* Use a reasonable default. */
1236 opts
->x_help_columns
= 80;
1239 /* Decide upon the title for the options that we are going to display. */
1240 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1242 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
& all_langs_mask
)
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");
1281 else if (include_flags
& CL_SEPARATE
)
1282 description
= _("The following options take separate arguments");
1283 else if (include_flags
& CL_JOINED
)
1284 description
= _("The following options take joined arguments");
1287 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1294 if (any_flags
& all_langs_mask
)
1295 description
= _("The following options are language-related");
1297 description
= _("The following options are language-independent");
1301 printf ("%s%s:\n", description
, descrip_extra
);
1302 print_filtered_help (include_flags
, exclude_flags
, any_flags
,
1303 opts
->x_help_columns
, opts
, lang_mask
);
1307 /* Handle target- and language-independent options. Return zero to
1308 generate an "unknown option" message. Only options that need
1309 extra handling need to be listed here; if you simply want
1310 DECODED->value assigned to a variable, it happens automatically. */
1313 common_handle_option (struct gcc_options
*opts
,
1314 struct gcc_options
*opts_set
,
1315 const struct cl_decoded_option
*decoded
,
1316 unsigned int lang_mask
, int kind ATTRIBUTE_UNUSED
,
1318 const struct cl_option_handlers
*handlers
,
1319 diagnostic_context
*dc
)
1321 size_t scode
= decoded
->opt_index
;
1322 const char *arg
= decoded
->arg
;
1323 int value
= decoded
->value
;
1324 enum opt_code code
= (enum opt_code
) scode
;
1326 gcc_assert (decoded
->canonical_option_num_elements
<= 2);
1331 handle_param (opts
, opts_set
, loc
, arg
);
1336 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1337 unsigned int undoc_mask
;
1340 if (lang_mask
== CL_DRIVER
)
1343 undoc_mask
= ((opts
->x_verbose_flag
| opts
->x_extra_warnings
)
1346 /* First display any single language specific options. */
1347 for (i
= 0; i
< cl_lang_count
; i
++)
1349 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0, opts
,
1351 /* Next display any multi language specific options. */
1352 print_specific_help (0, undoc_mask
, all_langs_mask
, opts
, lang_mask
);
1353 /* Then display any remaining, non-language options. */
1354 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1356 print_specific_help (i
, undoc_mask
, 0, opts
, lang_mask
);
1357 opts
->x_exit_after_options
= true;
1361 case OPT__target_help
:
1362 if (lang_mask
== CL_DRIVER
)
1365 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0, opts
, lang_mask
);
1366 opts
->x_exit_after_options
= true;
1371 const char * a
= arg
;
1372 unsigned int include_flags
= 0;
1373 /* Note - by default we include undocumented options when listing
1374 specific classes. If you only want to see documented options
1375 then add ",^undocumented" to the --help= option. E.g.:
1377 --help=target,^undocumented */
1378 unsigned int exclude_flags
= 0;
1380 if (lang_mask
== CL_DRIVER
)
1383 /* Walk along the argument string, parsing each word in turn.
1385 arg = [^]{word}[,{arg}]
1386 word = {optimizers|target|warnings|undocumented|
1387 params|common|<language>} */
1392 const char * string
;
1397 { "optimizers", CL_OPTIMIZATION
},
1398 { "target", CL_TARGET
},
1399 { "warnings", CL_WARNING
},
1400 { "undocumented", CL_UNDOCUMENTED
},
1401 { "params", CL_PARAMS
},
1402 { "joined", CL_JOINED
},
1403 { "separate", CL_SEPARATE
},
1404 { "common", CL_COMMON
},
1407 unsigned int * pflags
;
1409 unsigned int lang_flag
, specific_flag
;
1416 pflags
= & exclude_flags
;
1419 pflags
= & include_flags
;
1421 comma
= strchr (a
, ',');
1432 /* Check to see if the string matches an option class name. */
1433 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1434 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1436 specific_flag
= specifics
[i
].flag
;
1440 /* Check to see if the string matches a language name.
1441 Note - we rely upon the alpha-sorted nature of the entries in
1442 the lang_names array, specifically that shorter names appear
1443 before their longer variants. (i.e. C before C++). That way
1444 when we are attempting to match --help=c for example we will
1445 match with C first and not C++. */
1446 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1447 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1449 lang_flag
= 1U << i
;
1453 if (specific_flag
!= 0)
1456 * pflags
|= specific_flag
;
1459 /* The option's argument matches both the start of a
1460 language name and the start of an option class name.
1461 We have a special case for when the user has
1462 specified "--help=c", but otherwise we have to issue
1464 if (strncasecmp (a
, "c", len
) == 0)
1465 * pflags
|= lang_flag
;
1468 "--help argument %q.*s is ambiguous, "
1469 "please be more specific",
1473 else if (lang_flag
!= 0)
1474 * pflags
|= lang_flag
;
1477 "unrecognized argument to --help= option: %q.*s",
1486 print_specific_help (include_flags
, exclude_flags
, 0, opts
,
1488 opts
->x_exit_after_options
= true;
1493 if (lang_mask
== CL_DRIVER
)
1496 opts
->x_exit_after_options
= true;
1499 case OPT_fsanitize_
:
1501 const char *p
= arg
;
1506 const char *const name
;
1511 { "address", SANITIZE_ADDRESS
| SANITIZE_USER_ADDRESS
,
1512 sizeof "address" - 1 },
1513 { "kernel-address", SANITIZE_ADDRESS
| SANITIZE_KERNEL_ADDRESS
,
1514 sizeof "kernel-address" - 1 },
1515 { "thread", SANITIZE_THREAD
, sizeof "thread" - 1 },
1516 { "leak", SANITIZE_LEAK
, sizeof "leak" - 1 },
1517 { "shift", SANITIZE_SHIFT
, sizeof "shift" - 1 },
1518 { "integer-divide-by-zero", SANITIZE_DIVIDE
,
1519 sizeof "integer-divide-by-zero" - 1 },
1520 { "undefined", SANITIZE_UNDEFINED
, sizeof "undefined" - 1 },
1521 { "unreachable", SANITIZE_UNREACHABLE
,
1522 sizeof "unreachable" - 1 },
1523 { "vla-bound", SANITIZE_VLA
, sizeof "vla-bound" - 1 },
1524 { "return", SANITIZE_RETURN
, sizeof "return" - 1 },
1525 { "null", SANITIZE_NULL
, sizeof "null" - 1 },
1526 { "signed-integer-overflow", SANITIZE_SI_OVERFLOW
,
1527 sizeof "signed-integer-overflow" -1 },
1528 { "bool", SANITIZE_BOOL
, sizeof "bool" - 1 },
1529 { "enum", SANITIZE_ENUM
, sizeof "enum" - 1 },
1530 { "float-divide-by-zero", SANITIZE_FLOAT_DIVIDE
,
1531 sizeof "float-divide-by-zero" - 1 },
1532 { "float-cast-overflow", SANITIZE_FLOAT_CAST
,
1533 sizeof "float-cast-overflow" - 1 },
1534 { "bounds", SANITIZE_BOUNDS
, sizeof "bounds" - 1 },
1535 { "alignment", SANITIZE_ALIGNMENT
, sizeof "alignment" - 1 },
1542 comma
= strchr (p
, ',');
1553 /* Check to see if the string matches an option class name. */
1554 for (i
= 0; spec
[i
].name
!= NULL
; ++i
)
1555 if (len
== spec
[i
].len
1556 && memcmp (p
, spec
[i
].name
, len
) == 0)
1558 /* Handle both -fsanitize and -fno-sanitize cases. */
1560 flag_sanitize
|= spec
[i
].flag
;
1562 flag_sanitize
&= ~spec
[i
].flag
;
1569 "unrecognized argument to -fsanitize= option: %q.*s",
1577 /* When instrumenting the pointers, we don't want to remove
1578 the null pointer checks. */
1579 if (flag_sanitize
& SANITIZE_NULL
)
1580 opts
->x_flag_delete_null_pointer_checks
= 0;
1582 /* Kernel ASan implies normal ASan but does not yet support
1584 if (flag_sanitize
& SANITIZE_KERNEL_ADDRESS
)
1586 maybe_set_param_value (PARAM_ASAN_INSTRUMENTATION_WITH_CALL_THRESHOLD
, 0,
1587 opts
->x_param_values
,
1588 opts_set
->x_param_values
);
1589 maybe_set_param_value (PARAM_ASAN_GLOBALS
, 0,
1590 opts
->x_param_values
,
1591 opts_set
->x_param_values
);
1592 maybe_set_param_value (PARAM_ASAN_STACK
, 0,
1593 opts
->x_param_values
,
1594 opts_set
->x_param_values
);
1595 maybe_set_param_value (PARAM_ASAN_USE_AFTER_RETURN
, 0,
1596 opts
->x_param_values
,
1597 opts_set
->x_param_values
);
1607 /* Currently handled in a prescan. */
1611 dc
->warning_as_error_requested
= value
;
1615 if (lang_mask
== CL_DRIVER
)
1618 enable_warning_as_error (arg
, value
, lang_mask
, handlers
,
1619 opts
, opts_set
, loc
, dc
);
1622 case OPT_Wforce_warnings
:
1623 dc
->force_warnings_requested
= value
;
1626 case OPT_Wlarger_than_
:
1627 opts
->x_larger_than_size
= value
;
1628 opts
->x_warn_larger_than
= value
!= -1;
1631 case OPT_Wfatal_errors
:
1632 dc
->fatal_errors
= value
;
1635 case OPT_Wframe_larger_than_
:
1636 opts
->x_frame_larger_than_size
= value
;
1637 opts
->x_warn_frame_larger_than
= value
!= -1;
1640 case OPT_Wstack_usage_
:
1641 opts
->x_warn_stack_usage
= value
;
1642 opts
->x_flag_stack_usage_info
= value
!= -1;
1646 warn_shadow_local
= value
;
1647 warn_shadow_compatible_local
= value
;
1650 case OPT_Wshadow_local
:
1651 warn_shadow_compatible_local
= value
;
1654 case OPT_Wstrict_aliasing
:
1655 set_Wstrict_aliasing (opts
, value
);
1658 case OPT_Wstrict_overflow
:
1659 opts
->x_warn_strict_overflow
= (value
1660 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1664 case OPT_Wsystem_headers
:
1665 dc
->dc_warn_system_headers
= value
;
1669 opts
->x_flag_gen_aux_info
= 1;
1672 case OPT_auxbase_strip
:
1674 char *tmp
= xstrdup (arg
);
1675 strip_off_ending (tmp
, strlen (tmp
));
1677 opts
->x_aux_base_name
= tmp
;
1684 decode_d_option (arg
, opts
, loc
, dc
);
1687 case OPT_fcall_used_
:
1688 case OPT_fcall_saved_
:
1693 case OPT_fdbg_cnt_list
:
1697 case OPT_fdebug_prefix_map_
:
1701 case OPT_fdiagnostics_show_location_
:
1702 diagnostic_prefixing_rule (dc
) = (diagnostic_prefixing_rule_t
) value
;
1705 case OPT_fdiagnostics_show_caret
:
1706 dc
->show_caret
= value
;
1709 case OPT_fdiagnostics_color_
:
1710 pp_show_color (dc
->printer
)
1711 = colorize_init ((diagnostic_color_rule_t
) value
);
1714 case OPT_fdiagnostics_show_option
:
1715 dc
->show_option_requested
= value
;
1722 case OPT_ffast_math
:
1723 set_fast_math_flags (opts
, value
);
1726 case OPT_funsafe_math_optimizations
:
1727 set_unsafe_math_optimizations_flags (opts
, value
);
1734 case OPT_finline_limit_
:
1735 set_param_value ("max-inline-insns-single", value
/ 2,
1736 opts
->x_param_values
, opts_set
->x_param_values
);
1737 set_param_value ("max-inline-insns-auto", value
/ 2,
1738 opts
->x_param_values
, opts_set
->x_param_values
);
1741 case OPT_finstrument_functions_exclude_function_list_
:
1742 add_comma_separated_to_vector
1743 (&opts
->x_flag_instrument_functions_exclude_functions
, arg
);
1746 case OPT_finstrument_functions_exclude_file_list_
:
1747 add_comma_separated_to_vector
1748 (&opts
->x_flag_instrument_functions_exclude_files
, arg
);
1751 case OPT_fmessage_length_
:
1752 pp_set_line_maximum_length (dc
->printer
, value
);
1753 diagnostic_set_caret_max_width (dc
, value
);
1757 case OPT_fopt_info_
:
1761 case OPT_fpack_struct_
:
1762 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1764 "structure alignment must be a small power of two, not %d",
1767 opts
->x_initial_max_fld_align
= value
;
1771 case OPT_fplugin_arg_
:
1775 case OPT_fprofile_use_
:
1776 opts
->x_profile_data_prefix
= xstrdup (arg
);
1777 opts
->x_flag_profile_use
= true;
1779 /* No break here - do -fprofile-use processing. */
1780 case OPT_fprofile_use
:
1781 if (!opts_set
->x_flag_branch_probabilities
)
1782 opts
->x_flag_branch_probabilities
= value
;
1783 if (!opts_set
->x_flag_profile_values
)
1784 opts
->x_flag_profile_values
= value
;
1785 if (!opts_set
->x_flag_unroll_loops
)
1786 opts
->x_flag_unroll_loops
= value
;
1787 if (!opts_set
->x_flag_peel_loops
)
1788 opts
->x_flag_peel_loops
= value
;
1789 if (!opts_set
->x_flag_tracer
)
1790 opts
->x_flag_tracer
= value
;
1791 if (!opts_set
->x_flag_value_profile_transformations
)
1792 opts
->x_flag_value_profile_transformations
= value
;
1793 if (!opts_set
->x_flag_inline_functions
)
1794 opts
->x_flag_inline_functions
= value
;
1795 if (!opts_set
->x_flag_ipa_cp
)
1796 opts
->x_flag_ipa_cp
= value
;
1797 if (!opts_set
->x_flag_ipa_cp_clone
1798 && value
&& opts
->x_flag_ipa_cp
)
1799 opts
->x_flag_ipa_cp_clone
= value
;
1800 if (!opts_set
->x_flag_predictive_commoning
)
1801 opts
->x_flag_predictive_commoning
= value
;
1802 if (!opts_set
->x_flag_unswitch_loops
)
1803 opts
->x_flag_unswitch_loops
= value
;
1804 if (!opts_set
->x_flag_gcse_after_reload
)
1805 opts
->x_flag_gcse_after_reload
= value
;
1806 if (!opts_set
->x_flag_tree_loop_vectorize
1807 && !opts_set
->x_flag_tree_vectorize
)
1808 opts
->x_flag_tree_loop_vectorize
= value
;
1809 if (!opts_set
->x_flag_tree_loop_distribute_patterns
)
1810 opts
->x_flag_tree_loop_distribute_patterns
= value
;
1811 if (!opts_set
->x_flag_profile_reorder_functions
)
1812 opts
->x_flag_profile_reorder_functions
= value
;
1813 /* Indirect call profiling should do all useful transformations
1814 speculative devirtualization does. */
1815 if (!opts_set
->x_flag_devirtualize_speculatively
1816 && opts
->x_flag_value_profile_transformations
)
1817 opts
->x_flag_devirtualize_speculatively
= false;
1820 case OPT_fprofile_generate_
:
1821 opts
->x_profile_data_prefix
= xstrdup (arg
);
1823 /* No break here - do -fprofile-generate processing. */
1824 case OPT_fprofile_generate
:
1825 if (!opts_set
->x_profile_arc_flag
)
1826 opts
->x_profile_arc_flag
= value
;
1827 if (!opts_set
->x_flag_profile_values
)
1828 opts
->x_flag_profile_values
= value
;
1829 if (!opts_set
->x_flag_inline_functions
)
1830 opts
->x_flag_inline_functions
= value
;
1831 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
1832 quadratic. Disable the pass until better memory representation
1834 if (!opts_set
->x_flag_ipa_reference
)
1835 opts
->x_flag_ipa_reference
= false;
1838 case OPT_fripa_inc_path_sub_
:
1839 lipo_inc_path_pattern
= xstrdup (arg
);
1842 case OPT_ftree_vectorize
:
1843 if (!opts_set
->x_flag_tree_loop_vectorize
)
1844 opts
->x_flag_tree_loop_vectorize
= value
;
1845 if (!opts_set
->x_flag_tree_slp_vectorize
)
1846 opts
->x_flag_tree_slp_vectorize
= value
;
1848 case OPT_fshow_column
:
1849 dc
->show_column
= value
;
1852 case OPT_frandom_seed
:
1853 /* The real switch is -fno-random-seed. */
1859 case OPT_frandom_seed_
:
1863 case OPT_fsched_verbose_
:
1864 #ifdef INSN_SCHEDULING
1865 /* Handled with Var in common.opt. */
1871 case OPT_fsched_stalled_insns_
:
1872 opts
->x_flag_sched_stalled_insns
= value
;
1873 if (opts
->x_flag_sched_stalled_insns
== 0)
1874 opts
->x_flag_sched_stalled_insns
= -1;
1877 case OPT_fsched_stalled_insns_dep_
:
1878 opts
->x_flag_sched_stalled_insns_dep
= value
;
1881 case OPT_fstack_check_
:
1882 if (!strcmp (arg
, "no"))
1883 opts
->x_flag_stack_check
= NO_STACK_CHECK
;
1884 else if (!strcmp (arg
, "generic"))
1885 /* This is the old stack checking method. */
1886 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1887 ? FULL_BUILTIN_STACK_CHECK
1888 : GENERIC_STACK_CHECK
;
1889 else if (!strcmp (arg
, "specific"))
1890 /* This is the new stack checking method. */
1891 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1892 ? FULL_BUILTIN_STACK_CHECK
1893 : STACK_CHECK_STATIC_BUILTIN
1894 ? STATIC_BUILTIN_STACK_CHECK
1895 : GENERIC_STACK_CHECK
;
1897 warning_at (loc
, 0, "unknown stack check parameter \"%s\"", arg
);
1900 case OPT_fstack_limit
:
1901 /* The real switch is -fno-stack-limit. */
1907 case OPT_fstack_limit_register_
:
1908 case OPT_fstack_limit_symbol_
:
1912 case OPT_fstack_usage
:
1913 opts
->x_flag_stack_usage
= value
;
1914 opts
->x_flag_stack_usage_info
= value
!= 0;
1918 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
, opts
, opts_set
,
1923 set_debug_level (SDB_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1927 if (arg
&& strlen (arg
) != 0)
1929 error_at (loc
, "%<-gdwarf%s%> is ambiguous; "
1930 "use %<-gdwarf-%s%> for DWARF version "
1931 "or %<-gdwarf -g%s%> for debug level", arg
, arg
, arg
);
1935 value
= opts
->x_dwarf_version
;
1939 if (value
< 2 || value
> 4)
1940 error_at (loc
, "dwarf version %d is not supported", value
);
1942 opts
->x_dwarf_version
= value
;
1943 set_debug_level (DWARF2_DEBUG
, false, "", opts
, opts_set
, loc
);
1946 case OPT_gsplit_dwarf
:
1947 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, "", opts
, opts_set
,
1952 set_debug_level (NO_DEBUG
, 2, arg
, opts
, opts_set
, loc
);
1957 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
, opts
, opts_set
,
1962 /* Synonym for -g1. */
1963 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, "1", opts
, opts_set
,
1968 set_debug_level (VMS_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1973 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
, opts
, opts_set
,
1979 /* Handled completely via specs. */
1982 case OPT_pedantic_errors
:
1983 dc
->pedantic_errors
= 1;
1984 control_warning_option (OPT_Wpedantic
, DK_ERROR
, value
,
1986 handlers
, opts
, opts_set
,
1991 opts
->x_flag_lto
= value
? "" : NULL
;
1995 dc
->dc_inhibit_warnings
= true;
1998 case OPT_fmax_errors_
:
1999 dc
->max_errors
= value
;
2002 case OPT_fuse_ld_bfd
:
2003 case OPT_fuse_ld_gold
:
2004 case OPT_fuse_linker_plugin
:
2005 /* No-op. Used by the driver and passed to us because it starts with f.*/
2010 opts
->x_flag_trapv
= 0;
2015 opts
->x_flag_wrapv
= 0;
2019 /* If the flag was handled in a standard way, assume the lack of
2020 processing here is intentional. */
2021 gcc_assert (option_flag_var (scode
, opts
));
2025 common_handle_option_auto (opts
, opts_set
, decoded
, lang_mask
, kind
,
2030 /* Handle --param NAME=VALUE. */
2032 handle_param (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
2033 location_t loc
, const char *carg
)
2038 arg
= xstrdup (carg
);
2039 equal
= strchr (arg
, '=');
2041 error_at (loc
, "%s: --param arguments should be of the form NAME=VALUE",
2045 value
= integral_argument (equal
+ 1);
2047 error_at (loc
, "invalid --param value %qs", equal
+ 1);
2051 set_param_value (arg
, value
,
2052 opts
->x_param_values
, opts_set
->x_param_values
);
2059 /* Used to set the level of strict aliasing warnings in OPTS,
2060 when no level is specified (i.e., when -Wstrict-aliasing, and not
2061 -Wstrict-aliasing=level was given).
2062 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
2063 and 0 otherwise. After calling this function, wstrict_aliasing will be
2064 set to the default value of -Wstrict_aliasing=level, currently 3. */
2066 set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
)
2068 gcc_assert (onoff
== 0 || onoff
== 1);
2070 opts
->x_warn_strict_aliasing
= 3;
2072 opts
->x_warn_strict_aliasing
= 0;
2075 /* The following routines are useful in setting all the flags that
2076 -ffast-math and -fno-fast-math imply. */
2078 set_fast_math_flags (struct gcc_options
*opts
, int set
)
2080 if (!opts
->frontend_set_flag_unsafe_math_optimizations
)
2082 opts
->x_flag_unsafe_math_optimizations
= set
;
2083 set_unsafe_math_optimizations_flags (opts
, set
);
2085 if (!opts
->frontend_set_flag_finite_math_only
)
2086 opts
->x_flag_finite_math_only
= set
;
2087 if (!opts
->frontend_set_flag_errno_math
)
2088 opts
->x_flag_errno_math
= !set
;
2091 if (!opts
->frontend_set_flag_signaling_nans
)
2092 opts
->x_flag_signaling_nans
= 0;
2093 if (!opts
->frontend_set_flag_rounding_math
)
2094 opts
->x_flag_rounding_math
= 0;
2095 if (!opts
->frontend_set_flag_cx_limited_range
)
2096 opts
->x_flag_cx_limited_range
= 1;
2100 /* When -funsafe-math-optimizations is set the following
2101 flags are set as well. */
2103 set_unsafe_math_optimizations_flags (struct gcc_options
*opts
, int set
)
2105 if (!opts
->frontend_set_flag_trapping_math
)
2106 opts
->x_flag_trapping_math
= !set
;
2107 if (!opts
->frontend_set_flag_signed_zeros
)
2108 opts
->x_flag_signed_zeros
= !set
;
2109 if (!opts
->frontend_set_flag_associative_math
)
2110 opts
->x_flag_associative_math
= set
;
2111 if (!opts
->frontend_set_flag_reciprocal_math
)
2112 opts
->x_flag_reciprocal_math
= set
;
2115 /* Return true iff flags in OPTS are set as if -ffast-math. */
2117 fast_math_flags_set_p (const struct gcc_options
*opts
)
2119 return (!opts
->x_flag_trapping_math
2120 && opts
->x_flag_unsafe_math_optimizations
2121 && opts
->x_flag_finite_math_only
2122 && !opts
->x_flag_signed_zeros
2123 && !opts
->x_flag_errno_math
);
2126 /* Return true iff flags are set as if -ffast-math but using the flags stored
2127 in the struct cl_optimization structure. */
2129 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
2131 return (!opt
->x_flag_trapping_math
2132 && opt
->x_flag_unsafe_math_optimizations
2133 && opt
->x_flag_finite_math_only
2134 && !opt
->x_flag_signed_zeros
2135 && !opt
->x_flag_errno_math
);
2138 /* Handle a debug output -g switch for options OPTS
2139 (OPTS_SET->x_write_symbols storing whether a debug type was passed
2140 explicitly), location LOC. EXTENDED is true or false to support
2141 extended output (2 is special and means "-ggdb" was given). */
2143 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
,
2144 struct gcc_options
*opts
, struct gcc_options
*opts_set
,
2147 opts
->x_use_gnu_debug_info_extensions
= extended
;
2149 if (type
== NO_DEBUG
)
2151 if (opts
->x_write_symbols
== NO_DEBUG
)
2153 opts
->x_write_symbols
= PREFERRED_DEBUGGING_TYPE
;
2157 #ifdef DWARF2_DEBUGGING_INFO
2158 opts
->x_write_symbols
= DWARF2_DEBUG
;
2159 #elif defined DBX_DEBUGGING_INFO
2160 opts
->x_write_symbols
= DBX_DEBUG
;
2164 if (opts
->x_write_symbols
== NO_DEBUG
)
2165 warning_at (loc
, 0, "target system does not support debug output");
2170 /* Does it conflict with an already selected type? */
2171 if (opts_set
->x_write_symbols
!= NO_DEBUG
2172 && opts
->x_write_symbols
!= NO_DEBUG
2173 && type
!= opts
->x_write_symbols
)
2174 error_at (loc
, "debug format \"%s\" conflicts with prior selection",
2175 debug_type_names
[type
]);
2176 opts
->x_write_symbols
= type
;
2177 opts_set
->x_write_symbols
= type
;
2180 /* A debug flag without a level defaults to level 2.
2181 If off or at level 1, set it to level 2, but if already
2182 at level 3, don't lower it. */
2185 if (opts
->x_debug_info_level
< DINFO_LEVEL_NORMAL
)
2186 opts
->x_debug_info_level
= DINFO_LEVEL_NORMAL
;
2190 int argval
= integral_argument (arg
);
2192 error_at (loc
, "unrecognised debug output level \"%s\"", arg
);
2193 else if (argval
> 3)
2194 error_at (loc
, "debug output level %s is too high", arg
);
2196 opts
->x_debug_info_level
= (enum debug_info_levels
) argval
;
2200 /* Arrange to dump core on error for diagnostic context DC. (The
2201 regular error message is still printed first, except in the case of
2205 setup_core_dumping (diagnostic_context
*dc
)
2208 signal (SIGABRT
, SIG_DFL
);
2210 #if defined(HAVE_SETRLIMIT)
2213 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
2214 fatal_error ("getting core file size maximum limit: %m");
2215 rlim
.rlim_cur
= rlim
.rlim_max
;
2216 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
2217 fatal_error ("setting core file size limit to maximum: %m");
2220 diagnostic_abort_on_error (dc
);
2223 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
2224 diagnostic context DC. */
2227 decode_d_option (const char *arg
, struct gcc_options
*opts
,
2228 location_t loc
, diagnostic_context
*dc
)
2236 opts
->x_flag_debug_asm
= 1;
2239 opts
->x_flag_print_asm_name
= 1;
2242 opts
->x_flag_dump_rtl_in_asm
= 1;
2243 opts
->x_flag_print_asm_name
= 1;
2246 opts
->x_rtl_dump_and_exit
= 1;
2248 case 'D': /* These are handled by the preprocessor. */
2255 setup_core_dumping (dc
);
2258 opts
->x_flag_dump_all_passed
= true;
2262 warning_at (loc
, 0, "unrecognized gcc debugging option: %c", c
);
2267 /* Enable (or disable if VALUE is 0) a warning option ARG (language
2268 mask LANG_MASK, option handlers HANDLERS) as an error for option
2269 structures OPTS and OPTS_SET, diagnostic context DC (possibly
2270 NULL), location LOC. This is used by -Werror=. */
2273 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
,
2274 const struct cl_option_handlers
*handlers
,
2275 struct gcc_options
*opts
,
2276 struct gcc_options
*opts_set
,
2277 location_t loc
, diagnostic_context
*dc
)
2282 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2283 new_option
[0] = 'W';
2284 strcpy (new_option
+ 1, arg
);
2285 option_index
= find_opt (new_option
, lang_mask
);
2286 if (option_index
== OPT_SPECIAL_unknown
)
2288 error_at (loc
, "-Werror=%s: no option -%s", arg
, new_option
);
2292 const diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
2294 control_warning_option (option_index
, (int) kind
, value
,
2296 handlers
, opts
, opts_set
, dc
);
2301 /* Return malloced memory for the name of the option OPTION_INDEX
2302 which enabled a diagnostic (context CONTEXT), originally of type
2303 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
2307 option_name (diagnostic_context
*context
, int option_index
,
2308 diagnostic_t orig_diag_kind
, diagnostic_t diag_kind
)
2312 /* A warning classified as an error. */
2313 if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
)
2314 && diag_kind
== DK_ERROR
)
2315 return concat (cl_options
[OPT_Werror_
].opt_text
,
2316 /* Skip over "-W". */
2317 cl_options
[option_index
].opt_text
+ 2,
2319 /* A warning with option. */
2321 return xstrdup (cl_options
[option_index
].opt_text
);
2323 /* A warning without option classified as an error. */
2324 else if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
2325 || diag_kind
== DK_WARNING
)
2326 && context
->warning_as_error_requested
)
2327 return xstrdup (cl_options
[OPT_Werror
].opt_text
);