1 /* Command line option handling.
2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
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"
26 #include "tm.h" /* For STACK_CHECK_BUILTIN,
27 STACK_CHECK_STATIC_BUILTIN, DEFAULT_GDB_EXTENSIONS,
28 DWARF2_DEBUGGING_INFO and DBX_DEBUGGING_INFO. */
33 #include "diagnostic.h"
34 #include "opts-diagnostic.h"
35 #include "insn-attr-common.h"
36 #include "common/common-target.h"
38 /* Indexed by enum debug_info_type. */
39 const char *const debug_type_names
[] =
41 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
44 /* Parse the -femit-struct-debug-detailed option value
45 and set the flag variables. */
47 #define MATCH( prefix, string ) \
48 ((strncmp (prefix, string, sizeof prefix - 1) == 0) \
49 ? ((string += sizeof prefix - 1), 1) : 0)
52 set_struct_debug_option (struct gcc_options
*opts
, location_t loc
,
55 /* various labels for comparison */
56 static const char dfn_lbl
[] = "dfn:", dir_lbl
[] = "dir:", ind_lbl
[] = "ind:";
57 static const char ord_lbl
[] = "ord:", gen_lbl
[] = "gen:";
58 static const char none_lbl
[] = "none", any_lbl
[] = "any";
59 static const char base_lbl
[] = "base", sys_lbl
[] = "sys";
61 enum debug_struct_file files
= DINFO_STRUCT_FILE_ANY
;
62 /* Default is to apply to as much as possible. */
63 enum debug_info_usage usage
= DINFO_USAGE_NUM_ENUMS
;
67 if (MATCH (dfn_lbl
, spec
))
68 usage
= DINFO_USAGE_DFN
;
69 else if (MATCH (dir_lbl
, spec
))
70 usage
= DINFO_USAGE_DIR_USE
;
71 else if (MATCH (ind_lbl
, spec
))
72 usage
= DINFO_USAGE_IND_USE
;
74 /* Generics or not? */
75 if (MATCH (ord_lbl
, spec
))
77 else if (MATCH (gen_lbl
, spec
))
80 /* What allowable environment? */
81 if (MATCH (none_lbl
, spec
))
82 files
= DINFO_STRUCT_FILE_NONE
;
83 else if (MATCH (any_lbl
, spec
))
84 files
= DINFO_STRUCT_FILE_ANY
;
85 else if (MATCH (sys_lbl
, spec
))
86 files
= DINFO_STRUCT_FILE_SYS
;
87 else if (MATCH (base_lbl
, spec
))
88 files
= DINFO_STRUCT_FILE_BASE
;
91 "argument %qs to %<-femit-struct-debug-detailed%> "
95 /* Effect the specification. */
96 if (usage
== DINFO_USAGE_NUM_ENUMS
)
100 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DFN
] = files
;
101 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
] = files
;
102 opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
] = files
;
106 opts
->x_debug_struct_generic
[DINFO_USAGE_DFN
] = files
;
107 opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
] = files
;
108 opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
] = files
;
114 opts
->x_debug_struct_ordinary
[usage
] = files
;
116 opts
->x_debug_struct_generic
[usage
] = files
;
120 set_struct_debug_option (opts
, loc
, spec
+1);
123 /* No more -femit-struct-debug-detailed specifications.
127 "argument %qs to %<-femit-struct-debug-detailed%> unknown",
129 if (opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
]
130 < opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
]
131 || opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
]
132 < opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
])
134 "%<-femit-struct-debug-detailed=dir:...%> must allow "
135 "at least as much as "
136 "%<-femit-struct-debug-detailed=ind:...%>");
140 /* Handle -ftree-vectorizer-verbose=VAL for options OPTS. */
143 vect_set_verbosity_level (struct gcc_options
*opts
, int val
)
145 if (val
< MAX_VERBOSITY_LEVEL
)
146 opts
->x_user_vect_verbosity_level
= (enum vect_verbosity_levels
) val
;
148 opts
->x_user_vect_verbosity_level
149 = (enum vect_verbosity_levels
) (MAX_VERBOSITY_LEVEL
- 1);
153 /* Strip off a legitimate source ending from the input string NAME of
154 length LEN. Rather than having to know the names used by all of
155 our front ends, we strip off an ending of a period followed by
156 up to five characters. (Java uses ".class".) */
159 strip_off_ending (char *name
, int len
)
162 for (i
= 2; i
< 6 && len
> i
; i
++)
164 if (name
[len
- i
] == '.')
166 name
[len
- i
] = '\0';
172 /* Find the base name of a path, stripping off both directories and
173 a single final extension. */
175 base_of_path (const char *path
, const char **base_out
)
177 const char *base
= path
;
179 const char *p
= path
;
183 if (IS_DIR_SEPARATOR(c
))
198 /* What to print when a switch has no documentation. */
199 static const char undocumented_msg
[] = N_("This switch lacks documentation");
201 typedef char *char_p
; /* For DEF_VEC_P. */
203 DEF_VEC_ALLOC_P(char_p
,heap
);
205 static void handle_param (struct gcc_options
*opts
,
206 struct gcc_options
*opts_set
, location_t loc
,
208 static void set_debug_level (enum debug_info_type type
, int extended
,
209 const char *arg
, struct gcc_options
*opts
,
210 struct gcc_options
*opts_set
,
212 static void set_fast_math_flags (struct gcc_options
*opts
, int set
);
213 static void decode_d_option (const char *arg
, struct gcc_options
*opts
,
214 location_t loc
, diagnostic_context
*dc
);
215 static void set_unsafe_math_optimizations_flags (struct gcc_options
*opts
,
217 static void enable_warning_as_error (const char *arg
, int value
,
218 unsigned int lang_mask
,
219 const struct cl_option_handlers
*handlers
,
220 struct gcc_options
*opts
,
221 struct gcc_options
*opts_set
,
223 diagnostic_context
*dc
);
225 /* Handle a back-end option; arguments and return value as for
229 target_handle_option (struct gcc_options
*opts
,
230 struct gcc_options
*opts_set
,
231 const struct cl_decoded_option
*decoded
,
232 unsigned int lang_mask ATTRIBUTE_UNUSED
, int kind
,
234 const struct cl_option_handlers
*handlers ATTRIBUTE_UNUSED
,
235 diagnostic_context
*dc
)
237 gcc_assert (dc
== global_dc
);
238 gcc_assert (kind
== DK_UNSPECIFIED
);
239 return targetm_common
.handle_option (opts
, opts_set
, decoded
, loc
);
242 /* Add comma-separated strings to a char_p vector. */
245 add_comma_separated_to_vector (void **pvec
, const char *arg
)
251 VEC(char_p
,heap
) *vec
= (VEC(char_p
,heap
) *) *pvec
;
253 /* We never free this string. */
266 VEC_safe_push (char_p
, heap
, vec
, token_start
);
269 if (*r
== '\\' && r
[1] == ',')
277 if (*token_start
!= '\0')
278 VEC_safe_push (char_p
, heap
, vec
, token_start
);
283 /* Initialize OPTS and OPTS_SET before using them in parsing options. */
286 init_options_struct (struct gcc_options
*opts
, struct gcc_options
*opts_set
)
288 size_t num_params
= get_num_compiler_params ();
290 *opts
= global_options_init
;
291 memset (opts_set
, 0, sizeof (*opts_set
));
293 opts
->x_param_values
= XNEWVEC (int, num_params
);
294 opts_set
->x_param_values
= XCNEWVEC (int, num_params
);
295 init_param_values (opts
->x_param_values
);
297 /* Initialize whether `char' is signed. */
298 opts
->x_flag_signed_char
= DEFAULT_SIGNED_CHAR
;
299 /* Set this to a special "uninitialized" value. The actual default
300 is set after target options have been processed. */
301 opts
->x_flag_short_enums
= 2;
303 /* Initialize target_flags before default_options_optimization
304 so the latter can modify it. */
305 opts
->x_target_flags
= targetm_common
.default_target_flags
;
307 /* Some targets have ABI-specified unwind tables. */
308 opts
->x_flag_unwind_tables
= targetm_common
.unwind_tables_default
;
310 /* Some targets have other target-specific initialization. */
311 targetm_common
.option_init_struct (opts
);
314 /* If indicated by the optimization level LEVEL (-Os if SIZE is set,
315 -Ofast if FAST is set), apply the option DEFAULT_OPT to OPTS and
316 OPTS_SET, diagnostic context DC, location LOC, with language mask
317 LANG_MASK and option handlers HANDLERS. */
320 maybe_default_option (struct gcc_options
*opts
,
321 struct gcc_options
*opts_set
,
322 const struct default_options
*default_opt
,
323 int level
, bool size
, bool fast
,
324 unsigned int lang_mask
,
325 const struct cl_option_handlers
*handlers
,
327 diagnostic_context
*dc
)
329 const struct cl_option
*option
= &cl_options
[default_opt
->opt_index
];
333 gcc_assert (level
== 2);
335 gcc_assert (level
== 3);
337 switch (default_opt
->levels
)
343 case OPT_LEVELS_0_ONLY
:
344 enabled
= (level
== 0);
347 case OPT_LEVELS_1_PLUS
:
348 enabled
= (level
>= 1);
351 case OPT_LEVELS_1_PLUS_SPEED_ONLY
:
352 enabled
= (level
>= 1 && !size
);
355 case OPT_LEVELS_2_PLUS
:
356 enabled
= (level
>= 2);
359 case OPT_LEVELS_2_PLUS_SPEED_ONLY
:
360 enabled
= (level
>= 2 && !size
);
363 case OPT_LEVELS_3_PLUS
:
364 enabled
= (level
>= 3);
367 case OPT_LEVELS_3_PLUS_AND_SIZE
:
368 enabled
= (level
>= 3 || size
);
371 case OPT_LEVELS_SIZE
:
375 case OPT_LEVELS_FAST
:
379 case OPT_LEVELS_NONE
:
385 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
386 default_opt
->arg
, default_opt
->value
,
387 lang_mask
, DK_UNSPECIFIED
, loc
,
389 else if (default_opt
->arg
== NULL
390 && !option
->cl_reject_negative
)
391 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
392 default_opt
->arg
, !default_opt
->value
,
393 lang_mask
, DK_UNSPECIFIED
, loc
,
397 /* As indicated by the optimization level LEVEL (-Os if SIZE is set,
398 -Ofast if FAST is set), apply the options in array DEFAULT_OPTS to
399 OPTS and OPTS_SET, diagnostic context DC, location LOC, with
400 language mask LANG_MASK and option handlers HANDLERS. */
403 maybe_default_options (struct gcc_options
*opts
,
404 struct gcc_options
*opts_set
,
405 const struct default_options
*default_opts
,
406 int level
, bool size
, bool fast
,
407 unsigned int lang_mask
,
408 const struct cl_option_handlers
*handlers
,
410 diagnostic_context
*dc
)
414 for (i
= 0; default_opts
[i
].levels
!= OPT_LEVELS_NONE
; i
++)
415 maybe_default_option (opts
, opts_set
, &default_opts
[i
],
416 level
, size
, fast
, lang_mask
, handlers
, loc
, dc
);
419 /* Table of options enabled by default at different levels. */
421 static const struct default_options default_options_table
[] =
423 /* -O1 optimizations. */
424 { OPT_LEVELS_1_PLUS
, OPT_fdefer_pop
, NULL
, 1 },
426 { OPT_LEVELS_1_PLUS
, OPT_fdelayed_branch
, NULL
, 1 },
428 { OPT_LEVELS_1_PLUS
, OPT_fguess_branch_probability
, NULL
, 1 },
429 { OPT_LEVELS_1_PLUS
, OPT_fcprop_registers
, NULL
, 1 },
430 { OPT_LEVELS_1_PLUS
, OPT_fforward_propagate
, NULL
, 1 },
431 { OPT_LEVELS_1_PLUS
, OPT_fif_conversion
, NULL
, 1 },
432 { OPT_LEVELS_1_PLUS
, OPT_fif_conversion2
, NULL
, 1 },
433 { OPT_LEVELS_1_PLUS
, OPT_fipa_pure_const
, NULL
, 1 },
434 { OPT_LEVELS_1_PLUS
, OPT_fipa_reference
, NULL
, 1 },
435 { OPT_LEVELS_1_PLUS
, OPT_fipa_profile
, NULL
, 1 },
436 { OPT_LEVELS_1_PLUS
, OPT_fmerge_constants
, NULL
, 1 },
437 { OPT_LEVELS_1_PLUS
, OPT_fshrink_wrap
, NULL
, 1 },
438 { OPT_LEVELS_1_PLUS
, OPT_fsplit_wide_types
, NULL
, 1 },
439 { OPT_LEVELS_1_PLUS
, OPT_ftree_ccp
, NULL
, 1 },
440 { OPT_LEVELS_1_PLUS
, OPT_ftree_bit_ccp
, NULL
, 1 },
441 { OPT_LEVELS_1_PLUS
, OPT_ftree_dce
, NULL
, 1 },
442 { OPT_LEVELS_1_PLUS
, OPT_ftree_dominator_opts
, NULL
, 1 },
443 { OPT_LEVELS_1_PLUS
, OPT_ftree_dse
, NULL
, 1 },
444 { OPT_LEVELS_1_PLUS
, OPT_ftree_ter
, NULL
, 1 },
445 { OPT_LEVELS_1_PLUS
, OPT_ftree_sra
, NULL
, 1 },
446 { OPT_LEVELS_1_PLUS
, OPT_ftree_copyrename
, NULL
, 1 },
447 { OPT_LEVELS_1_PLUS
, OPT_ftree_fre
, NULL
, 1 },
448 { OPT_LEVELS_1_PLUS
, OPT_ftree_copy_prop
, NULL
, 1 },
449 { OPT_LEVELS_1_PLUS
, OPT_ftree_sink
, NULL
, 1 },
450 { OPT_LEVELS_1_PLUS
, OPT_ftree_ch
, NULL
, 1 },
451 { OPT_LEVELS_1_PLUS
, OPT_fcombine_stack_adjustments
, NULL
, 1 },
452 { OPT_LEVELS_1_PLUS
, OPT_fcompare_elim
, NULL
, 1 },
454 /* -O2 optimizations. */
455 { OPT_LEVELS_2_PLUS
, OPT_finline_small_functions
, NULL
, 1 },
456 { OPT_LEVELS_2_PLUS
, OPT_findirect_inlining
, NULL
, 1 },
457 { OPT_LEVELS_2_PLUS
, OPT_fpartial_inlining
, NULL
, 1 },
458 { OPT_LEVELS_2_PLUS
, OPT_fthread_jumps
, NULL
, 1 },
459 { OPT_LEVELS_2_PLUS
, OPT_fcrossjumping
, NULL
, 1 },
460 { OPT_LEVELS_2_PLUS
, OPT_foptimize_sibling_calls
, NULL
, 1 },
461 { OPT_LEVELS_2_PLUS
, OPT_fcse_follow_jumps
, NULL
, 1 },
462 { OPT_LEVELS_2_PLUS
, OPT_fgcse
, NULL
, 1 },
463 { OPT_LEVELS_2_PLUS
, OPT_fexpensive_optimizations
, NULL
, 1 },
464 { OPT_LEVELS_2_PLUS
, OPT_frerun_cse_after_loop
, NULL
, 1 },
465 { OPT_LEVELS_2_PLUS
, OPT_fcaller_saves
, NULL
, 1 },
466 { OPT_LEVELS_2_PLUS
, OPT_fpeephole2
, NULL
, 1 },
467 #ifdef INSN_SCHEDULING
468 /* Only run the pre-regalloc scheduling pass if optimizing for speed. */
469 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_fschedule_insns
, NULL
, 1 },
470 { OPT_LEVELS_2_PLUS
, OPT_fschedule_insns2
, NULL
, 1 },
472 { OPT_LEVELS_2_PLUS
, OPT_fregmove
, NULL
, 1 },
473 { OPT_LEVELS_2_PLUS
, OPT_fstrict_aliasing
, NULL
, 1 },
474 { OPT_LEVELS_2_PLUS
, OPT_fstrict_overflow
, NULL
, 1 },
475 { OPT_LEVELS_2_PLUS
, OPT_freorder_blocks
, NULL
, 1 },
476 { OPT_LEVELS_2_PLUS
, OPT_freorder_functions
, NULL
, 1 },
477 { OPT_LEVELS_2_PLUS
, OPT_ftree_vrp
, NULL
, 1 },
478 { OPT_LEVELS_2_PLUS
, OPT_ftree_builtin_call_dce
, NULL
, 1 },
479 { OPT_LEVELS_2_PLUS
, OPT_ftree_pre
, NULL
, 1 },
480 { OPT_LEVELS_2_PLUS
, OPT_ftree_switch_conversion
, NULL
, 1 },
481 { OPT_LEVELS_2_PLUS
, OPT_fipa_cp
, NULL
, 1 },
482 { OPT_LEVELS_2_PLUS
, OPT_fdevirtualize
, NULL
, 1 },
483 { OPT_LEVELS_2_PLUS
, OPT_fipa_sra
, NULL
, 1 },
484 { OPT_LEVELS_2_PLUS
, OPT_falign_loops
, NULL
, 1 },
485 { OPT_LEVELS_2_PLUS
, OPT_falign_jumps
, NULL
, 1 },
486 { OPT_LEVELS_2_PLUS
, OPT_falign_labels
, NULL
, 1 },
487 { OPT_LEVELS_2_PLUS
, OPT_falign_functions
, NULL
, 1 },
488 { OPT_LEVELS_2_PLUS
, OPT_ftree_tail_merge
, NULL
, 1 },
489 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_foptimize_strlen
, NULL
, 1 },
491 /* -O3 optimizations. */
492 { OPT_LEVELS_3_PLUS
, OPT_ftree_loop_distribute_patterns
, NULL
, 1 },
493 { OPT_LEVELS_3_PLUS
, OPT_fpredictive_commoning
, NULL
, 1 },
494 /* Inlining of functions reducing size is a good idea with -Os
495 regardless of them being declared inline. */
496 { OPT_LEVELS_3_PLUS_AND_SIZE
, OPT_finline_functions
, NULL
, 1 },
497 { OPT_LEVELS_1_PLUS
, OPT_finline_functions_called_once
, NULL
, 1 },
498 { OPT_LEVELS_3_PLUS
, OPT_funswitch_loops
, NULL
, 1 },
499 { OPT_LEVELS_3_PLUS
, OPT_fgcse_after_reload
, NULL
, 1 },
500 { OPT_LEVELS_3_PLUS
, OPT_ftree_vectorize
, NULL
, 1 },
501 { OPT_LEVELS_3_PLUS
, OPT_fipa_cp_clone
, NULL
, 1 },
502 { OPT_LEVELS_3_PLUS
, OPT_ftree_partial_pre
, NULL
, 1 },
504 /* -Ofast adds optimizations to -O3. */
505 { OPT_LEVELS_FAST
, OPT_ffast_math
, NULL
, 1 },
507 { OPT_LEVELS_NONE
, 0, NULL
, 0 }
510 /* Default the options in OPTS and OPTS_SET based on the optimization
511 settings in DECODED_OPTIONS and DECODED_OPTIONS_COUNT. */
513 default_options_optimization (struct gcc_options
*opts
,
514 struct gcc_options
*opts_set
,
515 struct cl_decoded_option
*decoded_options
,
516 unsigned int decoded_options_count
,
518 unsigned int lang_mask
,
519 const struct cl_option_handlers
*handlers
,
520 diagnostic_context
*dc
)
525 /* Scan to see what optimization level has been specified. That will
526 determine the default value of many flags. */
527 for (i
= 1; i
< decoded_options_count
; i
++)
529 struct cl_decoded_option
*opt
= &decoded_options
[i
];
530 switch (opt
->opt_index
)
533 if (*opt
->arg
== '\0')
535 opts
->x_optimize
= 1;
536 opts
->x_optimize_size
= 0;
537 opts
->x_optimize_fast
= 0;
541 const int optimize_val
= integral_argument (opt
->arg
);
542 if (optimize_val
== -1)
544 "argument to %qs should be a non-negative integer",
548 opts
->x_optimize
= optimize_val
;
549 if ((unsigned int) opts
->x_optimize
> 255)
550 opts
->x_optimize
= 255;
551 opts
->x_optimize_size
= 0;
552 opts
->x_optimize_fast
= 0;
558 opts
->x_optimize_size
= 1;
560 /* Optimizing for size forces optimize to be 2. */
561 opts
->x_optimize
= 2;
562 opts
->x_optimize_fast
= 0;
566 /* -Ofast only adds flags to -O3. */
567 opts
->x_optimize_size
= 0;
568 opts
->x_optimize
= 3;
569 opts
->x_optimize_fast
= 1;
573 /* Ignore other options in this prescan. */
578 maybe_default_options (opts
, opts_set
, default_options_table
,
579 opts
->x_optimize
, opts
->x_optimize_size
,
580 opts
->x_optimize_fast
, lang_mask
, handlers
, loc
, dc
);
582 /* -O2 param settings. */
583 opt2
= (opts
->x_optimize
>= 2);
585 /* Track fields in field-sensitive alias analysis. */
586 maybe_set_param_value
587 (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
,
588 opt2
? 100 : default_param_value (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
),
589 opts
->x_param_values
, opts_set
->x_param_values
);
591 /* For -O1 only do loop invariant motion for very small loops. */
592 maybe_set_param_value
593 (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
,
594 opt2
? default_param_value (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
) : 1000,
595 opts
->x_param_values
, opts_set
->x_param_values
);
597 if (opts
->x_optimize_size
)
598 /* We want to crossjump as much as possible. */
599 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
, 1,
600 opts
->x_param_values
, opts_set
->x_param_values
);
602 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
,
603 default_param_value (PARAM_MIN_CROSSJUMP_INSNS
),
604 opts
->x_param_values
, opts_set
->x_param_values
);
606 /* Allow default optimizations to be specified on a per-machine basis. */
607 maybe_default_options (opts
, opts_set
,
608 targetm_common
.option_optimization_table
,
609 opts
->x_optimize
, opts
->x_optimize_size
,
610 opts
->x_optimize_fast
, lang_mask
, handlers
, loc
, dc
);
613 /* After all options at LOC have been read into OPTS and OPTS_SET,
614 finalize settings of those options and diagnose incompatible
617 finish_options (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
620 enum unwind_info_type ui_except
;
622 if (opts
->x_dump_base_name
&& ! IS_ABSOLUTE_PATH (opts
->x_dump_base_name
))
624 /* First try to make OPTS->X_DUMP_BASE_NAME relative to the
625 OPTS->X_DUMP_DIR_NAME directory. Then try to make
626 OPTS->X_DUMP_BASE_NAME relative to the OPTS->X_AUX_BASE_NAME
627 directory, typically the directory to contain the object
629 if (opts
->x_dump_dir_name
)
630 opts
->x_dump_base_name
= concat (opts
->x_dump_dir_name
,
631 opts
->x_dump_base_name
, NULL
);
632 else if (opts
->x_aux_base_name
633 && strcmp (opts
->x_aux_base_name
, HOST_BIT_BUCKET
) != 0)
635 const char *aux_base
;
637 base_of_path (opts
->x_aux_base_name
, &aux_base
);
638 if (opts
->x_aux_base_name
!= aux_base
)
640 int dir_len
= aux_base
- opts
->x_aux_base_name
;
641 char *new_dump_base_name
=
642 XNEWVEC (char, strlen (opts
->x_dump_base_name
) + dir_len
+ 1);
644 /* Copy directory component from OPTS->X_AUX_BASE_NAME. */
645 memcpy (new_dump_base_name
, opts
->x_aux_base_name
, dir_len
);
646 /* Append existing OPTS->X_DUMP_BASE_NAME. */
647 strcpy (new_dump_base_name
+ dir_len
, opts
->x_dump_base_name
);
648 opts
->x_dump_base_name
= new_dump_base_name
;
653 /* Handle related options for unit-at-a-time, toplevel-reorder, and
655 if (!opts
->x_flag_unit_at_a_time
)
657 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
658 error_at (loc
, "section anchors must be disabled when unit-at-a-time "
660 opts
->x_flag_section_anchors
= 0;
661 if (opts
->x_flag_toplevel_reorder
== 1)
662 error_at (loc
, "toplevel reorder must be disabled when unit-at-a-time "
664 opts
->x_flag_toplevel_reorder
= 0;
667 if (opts
->x_flag_tm
&& opts
->x_flag_non_call_exceptions
)
668 sorry ("transactional memory is not supported with non-call exceptions");
670 /* -Wmissing-noreturn is alias for -Wsuggest-attribute=noreturn. */
671 if (opts
->x_warn_missing_noreturn
)
672 opts
->x_warn_suggest_attribute_noreturn
= true;
674 /* Unless the user has asked for section anchors, we disable toplevel
675 reordering at -O0 to disable transformations that might be surprising
676 to end users and to get -fno-toplevel-reorder tested. */
677 if (!opts
->x_optimize
678 && opts
->x_flag_toplevel_reorder
== 2
679 && !(opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
))
681 opts
->x_flag_toplevel_reorder
= 0;
682 opts
->x_flag_section_anchors
= 0;
684 if (!opts
->x_flag_toplevel_reorder
)
686 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
687 error_at (loc
, "section anchors must be disabled when toplevel reorder"
689 opts
->x_flag_section_anchors
= 0;
692 if (!opts
->x_flag_opts_finished
)
694 if (opts
->x_flag_pie
)
695 opts
->x_flag_pic
= opts
->x_flag_pie
;
696 if (opts
->x_flag_pic
&& !opts
->x_flag_pie
)
697 opts
->x_flag_shlib
= 1;
698 opts
->x_flag_opts_finished
= true;
701 if (opts
->x_optimize
== 0)
703 /* Inlining does not work if not optimizing,
704 so force it not to be done. */
705 opts
->x_warn_inline
= 0;
706 opts
->x_flag_no_inline
= 1;
709 /* The optimization to partition hot and cold basic blocks into separate
710 sections of the .o and executable files does not work (currently)
711 with exception handling. This is because there is no support for
712 generating unwind info. If opts->x_flag_exceptions is turned on
713 we need to turn off the partitioning optimization. */
715 ui_except
= targetm_common
.except_unwind_info (opts
);
717 if (opts
->x_flag_exceptions
718 && opts
->x_flag_reorder_blocks_and_partition
719 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))
722 "-freorder-blocks-and-partition does not work "
723 "with exceptions on this architecture");
724 opts
->x_flag_reorder_blocks_and_partition
= 0;
725 opts
->x_flag_reorder_blocks
= 1;
728 /* If user requested unwind info, then turn off the partitioning
731 if (opts
->x_flag_unwind_tables
732 && !targetm_common
.unwind_tables_default
733 && opts
->x_flag_reorder_blocks_and_partition
734 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))
737 "-freorder-blocks-and-partition does not support "
738 "unwind info on this architecture");
739 opts
->x_flag_reorder_blocks_and_partition
= 0;
740 opts
->x_flag_reorder_blocks
= 1;
743 /* If the target requested unwind info, then turn off the partitioning
744 optimization with a different message. Likewise, if the target does not
745 support named sections. */
747 if (opts
->x_flag_reorder_blocks_and_partition
748 && (!targetm_common
.have_named_sections
749 || (opts
->x_flag_unwind_tables
750 && targetm_common
.unwind_tables_default
751 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))))
754 "-freorder-blocks-and-partition does not work "
755 "on this architecture");
756 opts
->x_flag_reorder_blocks_and_partition
= 0;
757 opts
->x_flag_reorder_blocks
= 1;
760 if (opts
->x_flag_reorder_blocks_and_partition
761 && !opts_set
->x_flag_reorder_functions
)
762 opts
->x_flag_reorder_functions
= 1;
764 /* Pipelining of outer loops is only possible when general pipelining
765 capabilities are requested. */
766 if (!opts
->x_flag_sel_sched_pipelining
)
767 opts
->x_flag_sel_sched_pipelining_outer_loops
= 0;
769 if (opts
->x_flag_conserve_stack
)
771 maybe_set_param_value (PARAM_LARGE_STACK_FRAME
, 100,
772 opts
->x_param_values
, opts_set
->x_param_values
);
773 maybe_set_param_value (PARAM_STACK_FRAME_GROWTH
, 40,
774 opts
->x_param_values
, opts_set
->x_param_values
);
777 if (opts
->x_flag_lto
)
780 opts
->x_flag_generate_lto
= 1;
782 /* When generating IL, do not operate in whole-program mode.
783 Otherwise, symbols will be privatized too early, causing link
785 opts
->x_flag_whole_program
= 0;
787 error_at (loc
, "LTO support has not been enabled in this configuration");
789 if (!opts
->x_flag_fat_lto_objects
&& !HAVE_LTO_PLUGIN
)
790 error_at (loc
, "-fno-fat-lto-objects are supported only with linker plugin.");
792 if ((opts
->x_flag_lto_partition_balanced
!= 0) + (opts
->x_flag_lto_partition_1to1
!= 0)
793 + (opts
->x_flag_lto_partition_none
!= 0) >= 1)
795 if ((opts
->x_flag_lto_partition_balanced
!= 0)
796 + (opts
->x_flag_lto_partition_1to1
!= 0)
797 + (opts
->x_flag_lto_partition_none
!= 0) > 1)
798 error_at (loc
, "only one -flto-partition value can be specified");
801 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
802 default value if they choose based on other options. */
803 if (opts
->x_flag_split_stack
== -1)
804 opts
->x_flag_split_stack
= 0;
805 else if (opts
->x_flag_split_stack
)
807 if (!targetm_common
.supports_split_stack (true, opts
))
809 error_at (loc
, "%<-fsplit-stack%> is not supported by "
810 "this compiler configuration");
811 opts
->x_flag_split_stack
= 0;
815 /* Set PARAM_MAX_STORES_TO_SINK to 0 if either vectorization or if-conversion
817 if (!opts
->x_flag_tree_vectorize
|| !opts
->x_flag_tree_loop_if_convert
)
818 maybe_set_param_value (PARAM_MAX_STORES_TO_SINK
, 0,
819 opts
->x_param_values
, opts_set
->x_param_values
);
821 /* This replaces set_Wunused. */
822 if (opts
->x_warn_unused_function
== -1)
823 opts
->x_warn_unused_function
= opts
->x_warn_unused
;
824 if (opts
->x_warn_unused_label
== -1)
825 opts
->x_warn_unused_label
= opts
->x_warn_unused
;
826 /* Wunused-parameter is enabled if both -Wunused -Wextra are enabled. */
827 if (opts
->x_warn_unused_parameter
== -1)
828 opts
->x_warn_unused_parameter
= (opts
->x_warn_unused
829 && opts
->x_extra_warnings
);
830 if (opts
->x_warn_unused_variable
== -1)
831 opts
->x_warn_unused_variable
= opts
->x_warn_unused
;
832 /* Wunused-but-set-parameter is enabled if both -Wunused -Wextra are
834 if (opts
->x_warn_unused_but_set_parameter
== -1)
835 opts
->x_warn_unused_but_set_parameter
= (opts
->x_warn_unused
836 && opts
->x_extra_warnings
);
837 if (opts
->x_warn_unused_but_set_variable
== -1)
838 opts
->x_warn_unused_but_set_variable
= opts
->x_warn_unused
;
839 if (opts
->x_warn_unused_value
== -1)
840 opts
->x_warn_unused_value
= opts
->x_warn_unused
;
842 /* This replaces set_Wextra. */
843 if (opts
->x_warn_uninitialized
== -1)
844 opts
->x_warn_uninitialized
= opts
->x_extra_warnings
;
847 #define LEFT_COLUMN 27
849 /* Output ITEM, of length ITEM_WIDTH, in the left column,
850 followed by word-wrapped HELP in a second column. */
852 wrap_help (const char *help
,
854 unsigned int item_width
,
855 unsigned int columns
)
857 unsigned int col_width
= LEFT_COLUMN
;
858 unsigned int remaining
, room
, len
;
860 remaining
= strlen (help
);
864 room
= columns
- 3 - MAX (col_width
, item_width
);
873 for (i
= 0; help
[i
]; i
++)
875 if (i
>= room
&& len
!= remaining
)
879 else if ((help
[i
] == '-' || help
[i
] == '/')
880 && help
[i
+ 1] != ' '
881 && i
> 0 && ISALPHA (help
[i
- 1]))
886 printf( " %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
888 while (help
[len
] == ' ')
896 /* Print help for a specific front-end, etc. */
898 print_filtered_help (unsigned int include_flags
,
899 unsigned int exclude_flags
,
900 unsigned int any_flags
,
901 unsigned int columns
,
902 struct gcc_options
*opts
,
903 unsigned int lang_mask
)
908 bool displayed
= false;
910 if (include_flags
== CL_PARAMS
)
912 for (i
= 0; i
< LAST_PARAM
; i
++)
914 const char *param
= compiler_params
[i
].option
;
916 help
= compiler_params
[i
].help
;
917 if (help
== NULL
|| *help
== '\0')
919 if (exclude_flags
& CL_UNDOCUMENTED
)
921 help
= undocumented_msg
;
924 /* Get the translation. */
927 wrap_help (help
, param
, strlen (param
), columns
);
933 if (!opts
->x_help_printed
)
934 opts
->x_help_printed
= XCNEWVAR (char, cl_options_count
);
936 if (!opts
->x_help_enum_printed
)
937 opts
->x_help_enum_printed
= XCNEWVAR (char, cl_enums_count
);
939 for (i
= 0; i
< cl_options_count
; i
++)
942 const struct cl_option
*option
= cl_options
+ i
;
947 if (include_flags
== 0
948 || ((option
->flags
& include_flags
) != include_flags
))
950 if ((option
->flags
& any_flags
) == 0)
954 /* Skip unwanted switches. */
955 if ((option
->flags
& exclude_flags
) != 0)
958 /* The driver currently prints its own help text. */
959 if ((option
->flags
& CL_DRIVER
) != 0
960 && (option
->flags
& (((1U << cl_lang_count
) - 1)
961 | CL_COMMON
| CL_TARGET
)) == 0)
965 /* Skip switches that have already been printed. */
966 if (opts
->x_help_printed
[i
])
969 opts
->x_help_printed
[i
] = true;
974 if (exclude_flags
& CL_UNDOCUMENTED
)
976 help
= undocumented_msg
;
979 /* Get the translation. */
982 /* Find the gap between the name of the
983 option and its descriptive text. */
984 tab
= strchr (help
, '\t');
993 opt
= option
->opt_text
;
997 /* With the -Q option enabled we change the descriptive text associated
998 with an option to be an indication of its current setting. */
999 if (!opts
->x_quiet_flag
)
1001 void *flag_var
= option_flag_var (i
, opts
);
1003 if (len
< (LEFT_COLUMN
+ 2))
1004 strcpy (new_help
, "\t\t");
1006 strcpy (new_help
, "\t");
1008 if (flag_var
!= NULL
1009 && option
->var_type
!= CLVC_DEFER
)
1011 if (option
->flags
& CL_JOINED
)
1013 if (option
->var_type
== CLVC_STRING
)
1015 if (* (const char **) flag_var
!= NULL
)
1016 snprintf (new_help
+ strlen (new_help
),
1017 sizeof (new_help
) - strlen (new_help
),
1018 * (const char **) flag_var
);
1020 else if (option
->var_type
== CLVC_ENUM
)
1022 const struct cl_enum
*e
= &cl_enums
[option
->var_enum
];
1024 const char *arg
= NULL
;
1026 value
= e
->get (flag_var
);
1027 enum_value_to_arg (e
->values
, &arg
, value
, lang_mask
);
1029 arg
= _("[default]");
1030 snprintf (new_help
+ strlen (new_help
),
1031 sizeof (new_help
) - strlen (new_help
),
1035 sprintf (new_help
+ strlen (new_help
),
1036 "%#x", * (int *) flag_var
);
1039 strcat (new_help
, option_enabled (i
, opts
)
1040 ? _("[enabled]") : _("[disabled]"));
1046 wrap_help (help
, opt
, len
, columns
);
1049 if (option
->var_type
== CLVC_ENUM
1050 && opts
->x_help_enum_printed
[option
->var_enum
] != 2)
1051 opts
->x_help_enum_printed
[option
->var_enum
] = 1;
1056 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1059 printf (_(" No options with the desired characteristics were found\n"));
1064 /* PR 31349: Tell the user how to see all of the
1065 options supported by a specific front end. */
1066 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1067 if ((1U << i
) & langs
)
1068 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1069 lang_names
[i
], lang_names
[i
]);
1073 else if (! displayed
)
1074 printf (_(" All options with the desired characteristics have already been displayed\n"));
1078 /* Print details of enumerated option arguments, if those
1079 enumerations have help text headings provided. If no help text
1080 is provided, presume that the possible values are listed in the
1081 help text for the relevant options. */
1082 for (i
= 0; i
< cl_enums_count
; i
++)
1084 unsigned int j
, pos
;
1086 if (opts
->x_help_enum_printed
[i
] != 1)
1088 if (cl_enums
[i
].help
== NULL
)
1090 printf (" %s\n ", _(cl_enums
[i
].help
));
1092 for (j
= 0; cl_enums
[i
].values
[j
].arg
!= NULL
; j
++)
1094 unsigned int len
= strlen (cl_enums
[i
].values
[j
].arg
);
1096 if (pos
> 4 && pos
+ 1 + len
<= columns
)
1098 printf (" %s", cl_enums
[i
].values
[j
].arg
);
1108 printf ("%s", cl_enums
[i
].values
[j
].arg
);
1113 opts
->x_help_enum_printed
[i
] = 2;
1117 /* Display help for a specified type of option.
1118 The options must have ALL of the INCLUDE_FLAGS set
1119 ANY of the flags in the ANY_FLAGS set
1120 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1121 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1123 print_specific_help (unsigned int include_flags
,
1124 unsigned int exclude_flags
,
1125 unsigned int any_flags
,
1126 struct gcc_options
*opts
,
1127 unsigned int lang_mask
)
1129 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1130 const char * description
= NULL
;
1131 const char * descrip_extra
= "";
1135 /* Sanity check: Make sure that we do not have more
1136 languages than we have bits available to enumerate them. */
1137 gcc_assert ((1U << cl_lang_count
) <= CL_MIN_OPTION_CLASS
);
1139 /* If we have not done so already, obtain
1140 the desired maximum width of the output. */
1141 if (opts
->x_help_columns
== 0)
1145 p
= getenv ("COLUMNS");
1148 int value
= atoi (p
);
1151 opts
->x_help_columns
= value
;
1154 if (opts
->x_help_columns
== 0)
1155 /* Use a reasonable default. */
1156 opts
->x_help_columns
= 80;
1159 /* Decide upon the title for the options that we are going to display. */
1160 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1162 switch (flag
& include_flags
)
1169 description
= _("The following options are target specific");
1172 description
= _("The following options control compiler warning messages");
1174 case CL_OPTIMIZATION
:
1175 description
= _("The following options control optimizations");
1178 description
= _("The following options are language-independent");
1181 description
= _("The --param option recognizes the following as parameters");
1184 if (i
>= cl_lang_count
)
1186 if (exclude_flags
& all_langs_mask
)
1187 description
= _("The following options are specific to just the language ");
1189 description
= _("The following options are supported by the language ");
1190 descrip_extra
= lang_names
[i
];
1195 if (description
== NULL
)
1199 if (include_flags
& CL_UNDOCUMENTED
)
1200 description
= _("The following options are not documented");
1201 else if (include_flags
& CL_SEPARATE
)
1202 description
= _("The following options take separate arguments");
1203 else if (include_flags
& CL_JOINED
)
1204 description
= _("The following options take joined arguments");
1207 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1214 if (any_flags
& all_langs_mask
)
1215 description
= _("The following options are language-related");
1217 description
= _("The following options are language-independent");
1221 printf ("%s%s:\n", description
, descrip_extra
);
1222 print_filtered_help (include_flags
, exclude_flags
, any_flags
,
1223 opts
->x_help_columns
, opts
, lang_mask
);
1226 /* Handle target- and language-independent options. Return zero to
1227 generate an "unknown option" message. Only options that need
1228 extra handling need to be listed here; if you simply want
1229 DECODED->value assigned to a variable, it happens automatically. */
1232 common_handle_option (struct gcc_options
*opts
,
1233 struct gcc_options
*opts_set
,
1234 const struct cl_decoded_option
*decoded
,
1235 unsigned int lang_mask
, int kind ATTRIBUTE_UNUSED
,
1237 const struct cl_option_handlers
*handlers
,
1238 diagnostic_context
*dc
)
1240 size_t scode
= decoded
->opt_index
;
1241 const char *arg
= decoded
->arg
;
1242 int value
= decoded
->value
;
1243 enum opt_code code
= (enum opt_code
) scode
;
1245 gcc_assert (decoded
->canonical_option_num_elements
<= 2);
1250 handle_param (opts
, opts_set
, loc
, arg
);
1255 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1256 unsigned int undoc_mask
;
1259 if (lang_mask
== CL_DRIVER
)
1262 undoc_mask
= ((opts
->x_verbose_flag
| opts
->x_extra_warnings
)
1265 /* First display any single language specific options. */
1266 for (i
= 0; i
< cl_lang_count
; i
++)
1268 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0, opts
,
1270 /* Next display any multi language specific options. */
1271 print_specific_help (0, undoc_mask
, all_langs_mask
, opts
, lang_mask
);
1272 /* Then display any remaining, non-language options. */
1273 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1275 print_specific_help (i
, undoc_mask
, 0, opts
, lang_mask
);
1276 opts
->x_exit_after_options
= true;
1280 case OPT__target_help
:
1281 if (lang_mask
== CL_DRIVER
)
1284 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0, opts
, lang_mask
);
1285 opts
->x_exit_after_options
= true;
1290 const char * a
= arg
;
1291 unsigned int include_flags
= 0;
1292 /* Note - by default we include undocumented options when listing
1293 specific classes. If you only want to see documented options
1294 then add ",^undocumented" to the --help= option. E.g.:
1296 --help=target,^undocumented */
1297 unsigned int exclude_flags
= 0;
1299 if (lang_mask
== CL_DRIVER
)
1302 /* Walk along the argument string, parsing each word in turn.
1304 arg = [^]{word}[,{arg}]
1305 word = {optimizers|target|warnings|undocumented|
1306 params|common|<language>} */
1311 const char * string
;
1316 { "optimizers", CL_OPTIMIZATION
},
1317 { "target", CL_TARGET
},
1318 { "warnings", CL_WARNING
},
1319 { "undocumented", CL_UNDOCUMENTED
},
1320 { "params", CL_PARAMS
},
1321 { "joined", CL_JOINED
},
1322 { "separate", CL_SEPARATE
},
1323 { "common", CL_COMMON
},
1326 unsigned int * pflags
;
1328 unsigned int lang_flag
, specific_flag
;
1335 pflags
= & exclude_flags
;
1338 pflags
= & include_flags
;
1340 comma
= strchr (a
, ',');
1351 /* Check to see if the string matches an option class name. */
1352 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1353 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1355 specific_flag
= specifics
[i
].flag
;
1359 /* Check to see if the string matches a language name.
1360 Note - we rely upon the alpha-sorted nature of the entries in
1361 the lang_names array, specifically that shorter names appear
1362 before their longer variants. (i.e. C before C++). That way
1363 when we are attempting to match --help=c for example we will
1364 match with C first and not C++. */
1365 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1366 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1368 lang_flag
= 1U << i
;
1372 if (specific_flag
!= 0)
1375 * pflags
|= specific_flag
;
1378 /* The option's argument matches both the start of a
1379 language name and the start of an option class name.
1380 We have a special case for when the user has
1381 specified "--help=c", but otherwise we have to issue
1383 if (strncasecmp (a
, "c", len
) == 0)
1384 * pflags
|= lang_flag
;
1387 "--help argument %q.*s is ambiguous, "
1388 "please be more specific",
1392 else if (lang_flag
!= 0)
1393 * pflags
|= lang_flag
;
1396 "unrecognized argument to --help= option: %q.*s",
1405 print_specific_help (include_flags
, exclude_flags
, 0, opts
,
1407 opts
->x_exit_after_options
= true;
1412 if (lang_mask
== CL_DRIVER
)
1415 opts
->x_exit_after_options
= true;
1421 /* Currently handled in a prescan. */
1425 dc
->warning_as_error_requested
= value
;
1429 if (lang_mask
== CL_DRIVER
)
1432 enable_warning_as_error (arg
, value
, lang_mask
, handlers
,
1433 opts
, opts_set
, loc
, dc
);
1436 case OPT_Wlarger_than_
:
1437 opts
->x_larger_than_size
= value
;
1438 opts
->x_warn_larger_than
= value
!= -1;
1441 case OPT_Wfatal_errors
:
1442 dc
->fatal_errors
= value
;
1445 case OPT_Wframe_larger_than_
:
1446 opts
->x_frame_larger_than_size
= value
;
1447 opts
->x_warn_frame_larger_than
= value
!= -1;
1450 case OPT_Wstack_usage_
:
1451 opts
->x_warn_stack_usage
= value
;
1452 opts
->x_flag_stack_usage_info
= value
!= -1;
1455 case OPT_Wstrict_aliasing
:
1456 set_Wstrict_aliasing (opts
, value
);
1459 case OPT_Wstrict_overflow
:
1460 opts
->x_warn_strict_overflow
= (value
1461 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1465 case OPT_Wsystem_headers
:
1466 dc
->dc_warn_system_headers
= value
;
1470 opts
->x_flag_gen_aux_info
= 1;
1473 case OPT_auxbase_strip
:
1475 char *tmp
= xstrdup (arg
);
1476 strip_off_ending (tmp
, strlen (tmp
));
1478 opts
->x_aux_base_name
= tmp
;
1483 decode_d_option (arg
, opts
, loc
, dc
);
1486 case OPT_fcall_used_
:
1487 case OPT_fcall_saved_
:
1492 case OPT_fdbg_cnt_list
:
1496 case OPT_fdebug_prefix_map_
:
1500 case OPT_fdiagnostics_show_location_
:
1501 diagnostic_prefixing_rule (dc
) = (diagnostic_prefixing_rule_t
) value
;
1504 case OPT_fdiagnostics_show_caret
:
1505 dc
->show_caret
= value
;
1508 case OPT_fdiagnostics_show_option
:
1509 dc
->show_option_requested
= value
;
1516 case OPT_ffast_math
:
1517 set_fast_math_flags (opts
, value
);
1520 case OPT_funsafe_math_optimizations
:
1521 set_unsafe_math_optimizations_flags (opts
, value
);
1528 case OPT_finline_limit_
:
1529 set_param_value ("max-inline-insns-single", value
/ 2,
1530 opts
->x_param_values
, opts_set
->x_param_values
);
1531 set_param_value ("max-inline-insns-auto", value
/ 2,
1532 opts
->x_param_values
, opts_set
->x_param_values
);
1535 case OPT_finstrument_functions_exclude_function_list_
:
1536 add_comma_separated_to_vector
1537 (&opts
->x_flag_instrument_functions_exclude_functions
, arg
);
1540 case OPT_finstrument_functions_exclude_file_list_
:
1541 add_comma_separated_to_vector
1542 (&opts
->x_flag_instrument_functions_exclude_files
, arg
);
1545 case OPT_fmessage_length_
:
1546 pp_set_line_maximum_length (dc
->printer
, value
);
1547 diagnostic_set_caret_max_width (dc
, value
);
1550 case OPT_fpack_struct_
:
1551 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1553 "structure alignment must be a small power of two, not %d",
1556 opts
->x_initial_max_fld_align
= value
;
1560 case OPT_fplugin_arg_
:
1564 case OPT_fprofile_use_
:
1565 opts
->x_profile_data_prefix
= xstrdup (arg
);
1566 opts
->x_flag_profile_use
= true;
1568 /* No break here - do -fprofile-use processing. */
1569 case OPT_fprofile_use
:
1570 if (!opts_set
->x_flag_branch_probabilities
)
1571 opts
->x_flag_branch_probabilities
= value
;
1572 if (!opts_set
->x_flag_profile_values
)
1573 opts
->x_flag_profile_values
= value
;
1574 if (!opts_set
->x_flag_unroll_loops
)
1575 opts
->x_flag_unroll_loops
= value
;
1576 if (!opts_set
->x_flag_peel_loops
)
1577 opts
->x_flag_peel_loops
= value
;
1578 if (!opts_set
->x_flag_tracer
)
1579 opts
->x_flag_tracer
= value
;
1580 if (!opts_set
->x_flag_value_profile_transformations
)
1581 opts
->x_flag_value_profile_transformations
= value
;
1582 if (!opts_set
->x_flag_inline_functions
)
1583 opts
->x_flag_inline_functions
= value
;
1584 if (!opts_set
->x_flag_ipa_cp
)
1585 opts
->x_flag_ipa_cp
= value
;
1586 if (!opts_set
->x_flag_ipa_cp_clone
1587 && value
&& opts
->x_flag_ipa_cp
)
1588 opts
->x_flag_ipa_cp_clone
= value
;
1589 if (!opts_set
->x_flag_predictive_commoning
)
1590 opts
->x_flag_predictive_commoning
= value
;
1591 if (!opts_set
->x_flag_unswitch_loops
)
1592 opts
->x_flag_unswitch_loops
= value
;
1593 if (!opts_set
->x_flag_gcse_after_reload
)
1594 opts
->x_flag_gcse_after_reload
= value
;
1597 case OPT_fprofile_generate_
:
1598 opts
->x_profile_data_prefix
= xstrdup (arg
);
1600 /* No break here - do -fprofile-generate processing. */
1601 case OPT_fprofile_generate
:
1602 if (!opts_set
->x_profile_arc_flag
)
1603 opts
->x_profile_arc_flag
= value
;
1604 if (!opts_set
->x_flag_profile_values
)
1605 opts
->x_flag_profile_values
= value
;
1606 if (!opts_set
->x_flag_value_profile_transformations
)
1607 opts
->x_flag_value_profile_transformations
= value
;
1608 if (!opts_set
->x_flag_inline_functions
)
1609 opts
->x_flag_inline_functions
= value
;
1610 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
1611 quadratic. Disable the pass until better memory representation
1613 if (!opts_set
->x_flag_ipa_reference
&& opts
->x_in_lto_p
)
1614 opts
->x_flag_ipa_reference
= false;
1617 case OPT_fshow_column
:
1618 dc
->show_column
= value
;
1621 case OPT_frandom_seed
:
1622 /* The real switch is -fno-random-seed. */
1628 case OPT_frandom_seed_
:
1632 case OPT_fsched_verbose_
:
1633 #ifdef INSN_SCHEDULING
1634 /* Handled with Var in common.opt. */
1640 case OPT_fsched_stalled_insns_
:
1641 opts
->x_flag_sched_stalled_insns
= value
;
1642 if (opts
->x_flag_sched_stalled_insns
== 0)
1643 opts
->x_flag_sched_stalled_insns
= -1;
1646 case OPT_fsched_stalled_insns_dep_
:
1647 opts
->x_flag_sched_stalled_insns_dep
= value
;
1650 case OPT_fstack_check_
:
1651 if (!strcmp (arg
, "no"))
1652 opts
->x_flag_stack_check
= NO_STACK_CHECK
;
1653 else if (!strcmp (arg
, "generic"))
1654 /* This is the old stack checking method. */
1655 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1656 ? FULL_BUILTIN_STACK_CHECK
1657 : GENERIC_STACK_CHECK
;
1658 else if (!strcmp (arg
, "specific"))
1659 /* This is the new stack checking method. */
1660 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1661 ? FULL_BUILTIN_STACK_CHECK
1662 : STACK_CHECK_STATIC_BUILTIN
1663 ? STATIC_BUILTIN_STACK_CHECK
1664 : GENERIC_STACK_CHECK
;
1666 warning_at (loc
, 0, "unknown stack check parameter \"%s\"", arg
);
1669 case OPT_fstack_limit
:
1670 /* The real switch is -fno-stack-limit. */
1676 case OPT_fstack_limit_register_
:
1677 case OPT_fstack_limit_symbol_
:
1681 case OPT_fstack_usage
:
1682 opts
->x_flag_stack_usage
= value
;
1683 opts
->x_flag_stack_usage_info
= value
!= 0;
1686 case OPT_ftree_vectorizer_verbose_
:
1687 vect_set_verbosity_level (opts
, value
);
1691 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
, opts
, opts_set
,
1696 set_debug_level (SDB_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1700 if (value
< 2 || value
> 4)
1701 error_at (loc
, "dwarf version %d is not supported", value
);
1703 opts
->x_dwarf_version
= value
;
1704 set_debug_level (DWARF2_DEBUG
, false, "", opts
, opts_set
, loc
);
1708 set_debug_level (NO_DEBUG
, 2, arg
, opts
, opts_set
, loc
);
1713 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
, opts
, opts_set
,
1718 set_debug_level (VMS_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1723 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
, opts
, opts_set
,
1727 case OPT_pedantic_errors
:
1728 opts
->x_pedantic
= 1;
1729 dc
->pedantic_errors
= 1;
1733 opts
->x_flag_lto
= value
? "" : NULL
;
1737 dc
->dc_inhibit_warnings
= true;
1740 case OPT_fmax_errors_
:
1741 dc
->max_errors
= value
;
1744 case OPT_fuse_linker_plugin
:
1745 /* No-op. Used by the driver and passed to us because it starts with f.*/
1748 case OPT_Wuninitialized
:
1749 /* Also turn on maybe uninitialized warning. */
1750 opts
->x_warn_maybe_uninitialized
= value
;
1754 /* If the flag was handled in a standard way, assume the lack of
1755 processing here is intentional. */
1756 gcc_assert (option_flag_var (scode
, opts
));
1763 /* Handle --param NAME=VALUE. */
1765 handle_param (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1766 location_t loc
, const char *carg
)
1771 arg
= xstrdup (carg
);
1772 equal
= strchr (arg
, '=');
1774 error_at (loc
, "%s: --param arguments should be of the form NAME=VALUE",
1778 value
= integral_argument (equal
+ 1);
1780 error_at (loc
, "invalid --param value %qs", equal
+ 1);
1784 set_param_value (arg
, value
,
1785 opts
->x_param_values
, opts_set
->x_param_values
);
1792 /* Used to set the level of strict aliasing warnings in OPTS,
1793 when no level is specified (i.e., when -Wstrict-aliasing, and not
1794 -Wstrict-aliasing=level was given).
1795 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
1796 and 0 otherwise. After calling this function, wstrict_aliasing will be
1797 set to the default value of -Wstrict_aliasing=level, currently 3. */
1799 set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
)
1801 gcc_assert (onoff
== 0 || onoff
== 1);
1803 opts
->x_warn_strict_aliasing
= 3;
1805 opts
->x_warn_strict_aliasing
= 0;
1808 /* The following routines are useful in setting all the flags that
1809 -ffast-math and -fno-fast-math imply. */
1811 set_fast_math_flags (struct gcc_options
*opts
, int set
)
1813 if (!opts
->frontend_set_flag_unsafe_math_optimizations
)
1815 opts
->x_flag_unsafe_math_optimizations
= set
;
1816 set_unsafe_math_optimizations_flags (opts
, set
);
1818 if (!opts
->frontend_set_flag_finite_math_only
)
1819 opts
->x_flag_finite_math_only
= set
;
1820 if (!opts
->frontend_set_flag_errno_math
)
1821 opts
->x_flag_errno_math
= !set
;
1824 if (!opts
->frontend_set_flag_signaling_nans
)
1825 opts
->x_flag_signaling_nans
= 0;
1826 if (!opts
->frontend_set_flag_rounding_math
)
1827 opts
->x_flag_rounding_math
= 0;
1828 if (!opts
->frontend_set_flag_cx_limited_range
)
1829 opts
->x_flag_cx_limited_range
= 1;
1833 /* When -funsafe-math-optimizations is set the following
1834 flags are set as well. */
1836 set_unsafe_math_optimizations_flags (struct gcc_options
*opts
, int set
)
1838 if (!opts
->frontend_set_flag_trapping_math
)
1839 opts
->x_flag_trapping_math
= !set
;
1840 if (!opts
->frontend_set_flag_signed_zeros
)
1841 opts
->x_flag_signed_zeros
= !set
;
1842 if (!opts
->frontend_set_flag_associative_math
)
1843 opts
->x_flag_associative_math
= set
;
1844 if (!opts
->frontend_set_flag_reciprocal_math
)
1845 opts
->x_flag_reciprocal_math
= set
;
1848 /* Return true iff flags in OPTS are set as if -ffast-math. */
1850 fast_math_flags_set_p (const struct gcc_options
*opts
)
1852 return (!opts
->x_flag_trapping_math
1853 && opts
->x_flag_unsafe_math_optimizations
1854 && opts
->x_flag_finite_math_only
1855 && !opts
->x_flag_signed_zeros
1856 && !opts
->x_flag_errno_math
);
1859 /* Return true iff flags are set as if -ffast-math but using the flags stored
1860 in the struct cl_optimization structure. */
1862 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
1864 return (!opt
->x_flag_trapping_math
1865 && opt
->x_flag_unsafe_math_optimizations
1866 && opt
->x_flag_finite_math_only
1867 && !opt
->x_flag_signed_zeros
1868 && !opt
->x_flag_errno_math
);
1871 /* Handle a debug output -g switch for options OPTS
1872 (OPTS_SET->x_write_symbols storing whether a debug type was passed
1873 explicitly), location LOC. EXTENDED is true or false to support
1874 extended output (2 is special and means "-ggdb" was given). */
1876 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
,
1877 struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1880 opts
->x_use_gnu_debug_info_extensions
= extended
;
1882 if (type
== NO_DEBUG
)
1884 if (opts
->x_write_symbols
== NO_DEBUG
)
1886 opts
->x_write_symbols
= PREFERRED_DEBUGGING_TYPE
;
1890 #ifdef DWARF2_DEBUGGING_INFO
1891 opts
->x_write_symbols
= DWARF2_DEBUG
;
1892 #elif defined DBX_DEBUGGING_INFO
1893 opts
->x_write_symbols
= DBX_DEBUG
;
1897 if (opts
->x_write_symbols
== NO_DEBUG
)
1898 warning_at (loc
, 0, "target system does not support debug output");
1903 /* Does it conflict with an already selected type? */
1904 if (opts_set
->x_write_symbols
!= NO_DEBUG
1905 && opts
->x_write_symbols
!= NO_DEBUG
1906 && type
!= opts
->x_write_symbols
)
1907 error_at (loc
, "debug format \"%s\" conflicts with prior selection",
1908 debug_type_names
[type
]);
1909 opts
->x_write_symbols
= type
;
1910 opts_set
->x_write_symbols
= type
;
1913 /* A debug flag without a level defaults to level 2. */
1916 if (!opts
->x_debug_info_level
)
1917 opts
->x_debug_info_level
= DINFO_LEVEL_NORMAL
;
1921 int argval
= integral_argument (arg
);
1923 error_at (loc
, "unrecognised debug output level \"%s\"", arg
);
1924 else if (argval
> 3)
1925 error_at (loc
, "debug output level %s is too high", arg
);
1927 opts
->x_debug_info_level
= (enum debug_info_levels
) argval
;
1931 /* Arrange to dump core on error for diagnostic context DC. (The
1932 regular error message is still printed first, except in the case of
1936 setup_core_dumping (diagnostic_context
*dc
)
1939 signal (SIGABRT
, SIG_DFL
);
1941 #if defined(HAVE_SETRLIMIT)
1944 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
1945 fatal_error ("getting core file size maximum limit: %m");
1946 rlim
.rlim_cur
= rlim
.rlim_max
;
1947 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
1948 fatal_error ("setting core file size limit to maximum: %m");
1951 diagnostic_abort_on_error (dc
);
1954 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
1955 diagnostic context DC. */
1958 decode_d_option (const char *arg
, struct gcc_options
*opts
,
1959 location_t loc
, diagnostic_context
*dc
)
1967 opts
->x_flag_debug_asm
= 1;
1970 opts
->x_flag_print_asm_name
= 1;
1973 opts
->x_flag_dump_rtl_in_asm
= 1;
1974 opts
->x_flag_print_asm_name
= 1;
1977 opts
->x_graph_dump_format
= vcg
;
1980 opts
->x_rtl_dump_and_exit
= 1;
1982 case 'D': /* These are handled by the preprocessor. */
1989 setup_core_dumping (dc
);
1992 opts
->x_flag_dump_all_passed
= true;
1996 warning_at (loc
, 0, "unrecognized gcc debugging option: %c", c
);
2001 /* Enable (or disable if VALUE is 0) a warning option ARG (language
2002 mask LANG_MASK, option handlers HANDLERS) as an error for option
2003 structures OPTS and OPTS_SET, diagnostic context DC (possibly
2004 NULL), location LOC. This is used by -Werror=. */
2007 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
,
2008 const struct cl_option_handlers
*handlers
,
2009 struct gcc_options
*opts
,
2010 struct gcc_options
*opts_set
,
2011 location_t loc
, diagnostic_context
*dc
)
2016 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2017 new_option
[0] = 'W';
2018 strcpy (new_option
+ 1, arg
);
2019 option_index
= find_opt (new_option
, lang_mask
);
2020 if (option_index
== OPT_SPECIAL_unknown
)
2022 error_at (loc
, "-Werror=%s: no option -%s", arg
, new_option
);
2026 const diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
2028 control_warning_option (option_index
, (int) kind
, value
,
2030 handlers
, opts
, opts_set
, dc
);
2031 if (option_index
== OPT_Wuninitialized
)
2032 enable_warning_as_error ("maybe-uninitialized", value
, lang_mask
,
2033 handlers
, opts
, opts_set
, loc
, dc
);
2038 /* Return malloced memory for the name of the option OPTION_INDEX
2039 which enabled a diagnostic (context CONTEXT), originally of type
2040 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
2044 option_name (diagnostic_context
*context
, int option_index
,
2045 diagnostic_t orig_diag_kind
, diagnostic_t diag_kind
)
2049 /* A warning classified as an error. */
2050 if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
)
2051 && diag_kind
== DK_ERROR
)
2052 return concat (cl_options
[OPT_Werror_
].opt_text
,
2053 /* Skip over "-W". */
2054 cl_options
[option_index
].opt_text
+ 2,
2056 /* A warning with option. */
2058 return xstrdup (cl_options
[option_index
].opt_text
);
2060 /* A warning without option classified as an error. */
2061 else if (orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
2062 || diag_kind
== DK_WARNING
)
2064 if (context
->warning_as_error_requested
)
2065 return xstrdup (cl_options
[OPT_Werror
].opt_text
);
2067 return xstrdup (_("enabled by default"));