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 /* Unless the user has asked for section anchors, we disable toplevel
671 reordering at -O0 to disable transformations that might be surprising
672 to end users and to get -fno-toplevel-reorder tested. */
673 if (!opts
->x_optimize
674 && opts
->x_flag_toplevel_reorder
== 2
675 && !(opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
))
677 opts
->x_flag_toplevel_reorder
= 0;
678 opts
->x_flag_section_anchors
= 0;
680 if (!opts
->x_flag_toplevel_reorder
)
682 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
683 error_at (loc
, "section anchors must be disabled when toplevel reorder"
685 opts
->x_flag_section_anchors
= 0;
688 if (!opts
->x_flag_opts_finished
)
690 if (opts
->x_flag_pie
)
691 opts
->x_flag_pic
= opts
->x_flag_pie
;
692 if (opts
->x_flag_pic
&& !opts
->x_flag_pie
)
693 opts
->x_flag_shlib
= 1;
694 opts
->x_flag_opts_finished
= true;
697 if (opts
->x_optimize
== 0)
699 /* Inlining does not work if not optimizing,
700 so force it not to be done. */
701 opts
->x_warn_inline
= 0;
702 opts
->x_flag_no_inline
= 1;
705 /* The optimization to partition hot and cold basic blocks into separate
706 sections of the .o and executable files does not work (currently)
707 with exception handling. This is because there is no support for
708 generating unwind info. If opts->x_flag_exceptions is turned on
709 we need to turn off the partitioning optimization. */
711 ui_except
= targetm_common
.except_unwind_info (opts
);
713 if (opts
->x_flag_exceptions
714 && opts
->x_flag_reorder_blocks_and_partition
715 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))
718 "-freorder-blocks-and-partition does not work "
719 "with exceptions on this architecture");
720 opts
->x_flag_reorder_blocks_and_partition
= 0;
721 opts
->x_flag_reorder_blocks
= 1;
724 /* If user requested unwind info, then turn off the partitioning
727 if (opts
->x_flag_unwind_tables
728 && !targetm_common
.unwind_tables_default
729 && opts
->x_flag_reorder_blocks_and_partition
730 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))
733 "-freorder-blocks-and-partition does not support "
734 "unwind info on this architecture");
735 opts
->x_flag_reorder_blocks_and_partition
= 0;
736 opts
->x_flag_reorder_blocks
= 1;
739 /* If the target requested unwind info, then turn off the partitioning
740 optimization with a different message. Likewise, if the target does not
741 support named sections. */
743 if (opts
->x_flag_reorder_blocks_and_partition
744 && (!targetm_common
.have_named_sections
745 || (opts
->x_flag_unwind_tables
746 && targetm_common
.unwind_tables_default
747 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))))
750 "-freorder-blocks-and-partition does not work "
751 "on this architecture");
752 opts
->x_flag_reorder_blocks_and_partition
= 0;
753 opts
->x_flag_reorder_blocks
= 1;
756 if (opts
->x_flag_reorder_blocks_and_partition
757 && !opts_set
->x_flag_reorder_functions
)
758 opts
->x_flag_reorder_functions
= 1;
760 /* Pipelining of outer loops is only possible when general pipelining
761 capabilities are requested. */
762 if (!opts
->x_flag_sel_sched_pipelining
)
763 opts
->x_flag_sel_sched_pipelining_outer_loops
= 0;
765 if (opts
->x_flag_conserve_stack
)
767 maybe_set_param_value (PARAM_LARGE_STACK_FRAME
, 100,
768 opts
->x_param_values
, opts_set
->x_param_values
);
769 maybe_set_param_value (PARAM_STACK_FRAME_GROWTH
, 40,
770 opts
->x_param_values
, opts_set
->x_param_values
);
773 if (opts
->x_flag_lto
)
776 opts
->x_flag_generate_lto
= 1;
778 /* When generating IL, do not operate in whole-program mode.
779 Otherwise, symbols will be privatized too early, causing link
781 opts
->x_flag_whole_program
= 0;
783 error_at (loc
, "LTO support has not been enabled in this configuration");
785 if (!opts
->x_flag_fat_lto_objects
&& !HAVE_LTO_PLUGIN
)
786 error_at (loc
, "-fno-fat-lto-objects are supported only with linker plugin.");
788 if ((opts
->x_flag_lto_partition_balanced
!= 0) + (opts
->x_flag_lto_partition_1to1
!= 0)
789 + (opts
->x_flag_lto_partition_none
!= 0) >= 1)
791 if ((opts
->x_flag_lto_partition_balanced
!= 0)
792 + (opts
->x_flag_lto_partition_1to1
!= 0)
793 + (opts
->x_flag_lto_partition_none
!= 0) > 1)
794 error_at (loc
, "only one -flto-partition value can be specified");
797 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
798 default value if they choose based on other options. */
799 if (opts
->x_flag_split_stack
== -1)
800 opts
->x_flag_split_stack
= 0;
801 else if (opts
->x_flag_split_stack
)
803 if (!targetm_common
.supports_split_stack (true, opts
))
805 error_at (loc
, "%<-fsplit-stack%> is not supported by "
806 "this compiler configuration");
807 opts
->x_flag_split_stack
= 0;
811 /* Set PARAM_MAX_STORES_TO_SINK to 0 if either vectorization or if-conversion
813 if (!opts
->x_flag_tree_vectorize
|| !opts
->x_flag_tree_loop_if_convert
)
814 maybe_set_param_value (PARAM_MAX_STORES_TO_SINK
, 0,
815 opts
->x_param_values
, opts_set
->x_param_values
);
817 /* This replaces set_Wunused. */
818 if (opts
->x_warn_unused_function
== -1)
819 opts
->x_warn_unused_function
= opts
->x_warn_unused
;
820 if (opts
->x_warn_unused_label
== -1)
821 opts
->x_warn_unused_label
= opts
->x_warn_unused
;
822 /* Wunused-parameter is enabled if both -Wunused -Wextra are enabled. */
823 if (opts
->x_warn_unused_parameter
== -1)
824 opts
->x_warn_unused_parameter
= (opts
->x_warn_unused
825 && opts
->x_extra_warnings
);
826 if (opts
->x_warn_unused_variable
== -1)
827 opts
->x_warn_unused_variable
= opts
->x_warn_unused
;
828 /* Wunused-but-set-parameter is enabled if both -Wunused -Wextra are
830 if (opts
->x_warn_unused_but_set_parameter
== -1)
831 opts
->x_warn_unused_but_set_parameter
= (opts
->x_warn_unused
832 && opts
->x_extra_warnings
);
833 if (opts
->x_warn_unused_but_set_variable
== -1)
834 opts
->x_warn_unused_but_set_variable
= opts
->x_warn_unused
;
835 if (opts
->x_warn_unused_value
== -1)
836 opts
->x_warn_unused_value
= opts
->x_warn_unused
;
838 /* This replaces set_Wextra. */
839 if (opts
->x_warn_uninitialized
== -1)
840 opts
->x_warn_uninitialized
= opts
->x_extra_warnings
;
843 #define LEFT_COLUMN 27
845 /* Output ITEM, of length ITEM_WIDTH, in the left column,
846 followed by word-wrapped HELP in a second column. */
848 wrap_help (const char *help
,
850 unsigned int item_width
,
851 unsigned int columns
)
853 unsigned int col_width
= LEFT_COLUMN
;
854 unsigned int remaining
, room
, len
;
856 remaining
= strlen (help
);
860 room
= columns
- 3 - MAX (col_width
, item_width
);
869 for (i
= 0; help
[i
]; i
++)
871 if (i
>= room
&& len
!= remaining
)
875 else if ((help
[i
] == '-' || help
[i
] == '/')
876 && help
[i
+ 1] != ' '
877 && i
> 0 && ISALPHA (help
[i
- 1]))
882 printf( " %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
884 while (help
[len
] == ' ')
892 /* Print help for a specific front-end, etc. */
894 print_filtered_help (unsigned int include_flags
,
895 unsigned int exclude_flags
,
896 unsigned int any_flags
,
897 unsigned int columns
,
898 struct gcc_options
*opts
,
899 unsigned int lang_mask
)
904 bool displayed
= false;
906 if (include_flags
== CL_PARAMS
)
908 for (i
= 0; i
< LAST_PARAM
; i
++)
910 const char *param
= compiler_params
[i
].option
;
912 help
= compiler_params
[i
].help
;
913 if (help
== NULL
|| *help
== '\0')
915 if (exclude_flags
& CL_UNDOCUMENTED
)
917 help
= undocumented_msg
;
920 /* Get the translation. */
923 wrap_help (help
, param
, strlen (param
), columns
);
929 if (!opts
->x_help_printed
)
930 opts
->x_help_printed
= XCNEWVAR (char, cl_options_count
);
932 if (!opts
->x_help_enum_printed
)
933 opts
->x_help_enum_printed
= XCNEWVAR (char, cl_enums_count
);
935 for (i
= 0; i
< cl_options_count
; i
++)
938 const struct cl_option
*option
= cl_options
+ i
;
943 if (include_flags
== 0
944 || ((option
->flags
& include_flags
) != include_flags
))
946 if ((option
->flags
& any_flags
) == 0)
950 /* Skip unwanted switches. */
951 if ((option
->flags
& exclude_flags
) != 0)
954 /* The driver currently prints its own help text. */
955 if ((option
->flags
& CL_DRIVER
) != 0
956 && (option
->flags
& (((1U << cl_lang_count
) - 1)
957 | CL_COMMON
| CL_TARGET
)) == 0)
961 /* Skip switches that have already been printed. */
962 if (opts
->x_help_printed
[i
])
965 opts
->x_help_printed
[i
] = true;
970 if (exclude_flags
& CL_UNDOCUMENTED
)
972 help
= undocumented_msg
;
975 /* Get the translation. */
978 /* Find the gap between the name of the
979 option and its descriptive text. */
980 tab
= strchr (help
, '\t');
989 opt
= option
->opt_text
;
993 /* With the -Q option enabled we change the descriptive text associated
994 with an option to be an indication of its current setting. */
995 if (!opts
->x_quiet_flag
)
997 void *flag_var
= option_flag_var (i
, opts
);
999 if (len
< (LEFT_COLUMN
+ 2))
1000 strcpy (new_help
, "\t\t");
1002 strcpy (new_help
, "\t");
1004 if (flag_var
!= NULL
1005 && option
->var_type
!= CLVC_DEFER
)
1007 if (option
->flags
& CL_JOINED
)
1009 if (option
->var_type
== CLVC_STRING
)
1011 if (* (const char **) flag_var
!= NULL
)
1012 snprintf (new_help
+ strlen (new_help
),
1013 sizeof (new_help
) - strlen (new_help
),
1014 * (const char **) flag_var
);
1016 else if (option
->var_type
== CLVC_ENUM
)
1018 const struct cl_enum
*e
= &cl_enums
[option
->var_enum
];
1020 const char *arg
= NULL
;
1022 value
= e
->get (flag_var
);
1023 enum_value_to_arg (e
->values
, &arg
, value
, lang_mask
);
1025 arg
= _("[default]");
1026 snprintf (new_help
+ strlen (new_help
),
1027 sizeof (new_help
) - strlen (new_help
),
1031 sprintf (new_help
+ strlen (new_help
),
1032 "%#x", * (int *) flag_var
);
1035 strcat (new_help
, option_enabled (i
, opts
)
1036 ? _("[enabled]") : _("[disabled]"));
1042 wrap_help (help
, opt
, len
, columns
);
1045 if (option
->var_type
== CLVC_ENUM
1046 && opts
->x_help_enum_printed
[option
->var_enum
] != 2)
1047 opts
->x_help_enum_printed
[option
->var_enum
] = 1;
1052 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1055 printf (_(" No options with the desired characteristics were found\n"));
1060 /* PR 31349: Tell the user how to see all of the
1061 options supported by a specific front end. */
1062 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1063 if ((1U << i
) & langs
)
1064 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1065 lang_names
[i
], lang_names
[i
]);
1069 else if (! displayed
)
1070 printf (_(" All options with the desired characteristics have already been displayed\n"));
1074 /* Print details of enumerated option arguments, if those
1075 enumerations have help text headings provided. If no help text
1076 is provided, presume that the possible values are listed in the
1077 help text for the relevant options. */
1078 for (i
= 0; i
< cl_enums_count
; i
++)
1080 unsigned int j
, pos
;
1082 if (opts
->x_help_enum_printed
[i
] != 1)
1084 if (cl_enums
[i
].help
== NULL
)
1086 printf (" %s\n ", _(cl_enums
[i
].help
));
1088 for (j
= 0; cl_enums
[i
].values
[j
].arg
!= NULL
; j
++)
1090 unsigned int len
= strlen (cl_enums
[i
].values
[j
].arg
);
1092 if (pos
> 4 && pos
+ 1 + len
<= columns
)
1094 printf (" %s", cl_enums
[i
].values
[j
].arg
);
1104 printf ("%s", cl_enums
[i
].values
[j
].arg
);
1109 opts
->x_help_enum_printed
[i
] = 2;
1113 /* Display help for a specified type of option.
1114 The options must have ALL of the INCLUDE_FLAGS set
1115 ANY of the flags in the ANY_FLAGS set
1116 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1117 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1119 print_specific_help (unsigned int include_flags
,
1120 unsigned int exclude_flags
,
1121 unsigned int any_flags
,
1122 struct gcc_options
*opts
,
1123 unsigned int lang_mask
)
1125 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1126 const char * description
= NULL
;
1127 const char * descrip_extra
= "";
1131 /* Sanity check: Make sure that we do not have more
1132 languages than we have bits available to enumerate them. */
1133 gcc_assert ((1U << cl_lang_count
) <= CL_MIN_OPTION_CLASS
);
1135 /* If we have not done so already, obtain
1136 the desired maximum width of the output. */
1137 if (opts
->x_help_columns
== 0)
1141 p
= getenv ("COLUMNS");
1144 int value
= atoi (p
);
1147 opts
->x_help_columns
= value
;
1150 if (opts
->x_help_columns
== 0)
1151 /* Use a reasonable default. */
1152 opts
->x_help_columns
= 80;
1155 /* Decide upon the title for the options that we are going to display. */
1156 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1158 switch (flag
& include_flags
)
1165 description
= _("The following options are target specific");
1168 description
= _("The following options control compiler warning messages");
1170 case CL_OPTIMIZATION
:
1171 description
= _("The following options control optimizations");
1174 description
= _("The following options are language-independent");
1177 description
= _("The --param option recognizes the following as parameters");
1180 if (i
>= cl_lang_count
)
1182 if (exclude_flags
& all_langs_mask
)
1183 description
= _("The following options are specific to just the language ");
1185 description
= _("The following options are supported by the language ");
1186 descrip_extra
= lang_names
[i
];
1191 if (description
== NULL
)
1195 if (include_flags
& CL_UNDOCUMENTED
)
1196 description
= _("The following options are not documented");
1197 else if (include_flags
& CL_SEPARATE
)
1198 description
= _("The following options take separate arguments");
1199 else if (include_flags
& CL_JOINED
)
1200 description
= _("The following options take joined arguments");
1203 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1210 if (any_flags
& all_langs_mask
)
1211 description
= _("The following options are language-related");
1213 description
= _("The following options are language-independent");
1217 printf ("%s%s:\n", description
, descrip_extra
);
1218 print_filtered_help (include_flags
, exclude_flags
, any_flags
,
1219 opts
->x_help_columns
, opts
, lang_mask
);
1222 /* Handle target- and language-independent options. Return zero to
1223 generate an "unknown option" message. Only options that need
1224 extra handling need to be listed here; if you simply want
1225 DECODED->value assigned to a variable, it happens automatically. */
1228 common_handle_option (struct gcc_options
*opts
,
1229 struct gcc_options
*opts_set
,
1230 const struct cl_decoded_option
*decoded
,
1231 unsigned int lang_mask
, int kind ATTRIBUTE_UNUSED
,
1233 const struct cl_option_handlers
*handlers
,
1234 diagnostic_context
*dc
)
1236 size_t scode
= decoded
->opt_index
;
1237 const char *arg
= decoded
->arg
;
1238 int value
= decoded
->value
;
1239 enum opt_code code
= (enum opt_code
) scode
;
1241 gcc_assert (decoded
->canonical_option_num_elements
<= 2);
1246 handle_param (opts
, opts_set
, loc
, arg
);
1251 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1252 unsigned int undoc_mask
;
1255 if (lang_mask
== CL_DRIVER
)
1258 undoc_mask
= ((opts
->x_verbose_flag
| opts
->x_extra_warnings
)
1261 /* First display any single language specific options. */
1262 for (i
= 0; i
< cl_lang_count
; i
++)
1264 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0, opts
,
1266 /* Next display any multi language specific options. */
1267 print_specific_help (0, undoc_mask
, all_langs_mask
, opts
, lang_mask
);
1268 /* Then display any remaining, non-language options. */
1269 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1271 print_specific_help (i
, undoc_mask
, 0, opts
, lang_mask
);
1272 opts
->x_exit_after_options
= true;
1276 case OPT__target_help
:
1277 if (lang_mask
== CL_DRIVER
)
1280 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0, opts
, lang_mask
);
1281 opts
->x_exit_after_options
= true;
1286 const char * a
= arg
;
1287 unsigned int include_flags
= 0;
1288 /* Note - by default we include undocumented options when listing
1289 specific classes. If you only want to see documented options
1290 then add ",^undocumented" to the --help= option. E.g.:
1292 --help=target,^undocumented */
1293 unsigned int exclude_flags
= 0;
1295 if (lang_mask
== CL_DRIVER
)
1298 /* Walk along the argument string, parsing each word in turn.
1300 arg = [^]{word}[,{arg}]
1301 word = {optimizers|target|warnings|undocumented|
1302 params|common|<language>} */
1307 const char * string
;
1312 { "optimizers", CL_OPTIMIZATION
},
1313 { "target", CL_TARGET
},
1314 { "warnings", CL_WARNING
},
1315 { "undocumented", CL_UNDOCUMENTED
},
1316 { "params", CL_PARAMS
},
1317 { "joined", CL_JOINED
},
1318 { "separate", CL_SEPARATE
},
1319 { "common", CL_COMMON
},
1322 unsigned int * pflags
;
1324 unsigned int lang_flag
, specific_flag
;
1331 pflags
= & exclude_flags
;
1334 pflags
= & include_flags
;
1336 comma
= strchr (a
, ',');
1347 /* Check to see if the string matches an option class name. */
1348 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1349 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1351 specific_flag
= specifics
[i
].flag
;
1355 /* Check to see if the string matches a language name.
1356 Note - we rely upon the alpha-sorted nature of the entries in
1357 the lang_names array, specifically that shorter names appear
1358 before their longer variants. (i.e. C before C++). That way
1359 when we are attempting to match --help=c for example we will
1360 match with C first and not C++. */
1361 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1362 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1364 lang_flag
= 1U << i
;
1368 if (specific_flag
!= 0)
1371 * pflags
|= specific_flag
;
1374 /* The option's argument matches both the start of a
1375 language name and the start of an option class name.
1376 We have a special case for when the user has
1377 specified "--help=c", but otherwise we have to issue
1379 if (strncasecmp (a
, "c", len
) == 0)
1380 * pflags
|= lang_flag
;
1383 "--help argument %q.*s is ambiguous, "
1384 "please be more specific",
1388 else if (lang_flag
!= 0)
1389 * pflags
|= lang_flag
;
1392 "unrecognized argument to --help= option: %q.*s",
1401 print_specific_help (include_flags
, exclude_flags
, 0, opts
,
1403 opts
->x_exit_after_options
= true;
1408 if (lang_mask
== CL_DRIVER
)
1411 opts
->x_exit_after_options
= true;
1417 /* Currently handled in a prescan. */
1421 dc
->warning_as_error_requested
= value
;
1425 if (lang_mask
== CL_DRIVER
)
1428 enable_warning_as_error (arg
, value
, lang_mask
, handlers
,
1429 opts
, opts_set
, loc
, dc
);
1432 case OPT_Wlarger_than_
:
1433 opts
->x_larger_than_size
= value
;
1434 opts
->x_warn_larger_than
= value
!= -1;
1437 case OPT_Wfatal_errors
:
1438 dc
->fatal_errors
= value
;
1441 case OPT_Wframe_larger_than_
:
1442 opts
->x_frame_larger_than_size
= value
;
1443 opts
->x_warn_frame_larger_than
= value
!= -1;
1446 case OPT_Wstack_usage_
:
1447 opts
->x_warn_stack_usage
= value
;
1448 opts
->x_flag_stack_usage_info
= value
!= -1;
1451 case OPT_Wstrict_aliasing
:
1452 set_Wstrict_aliasing (opts
, value
);
1455 case OPT_Wstrict_overflow
:
1456 opts
->x_warn_strict_overflow
= (value
1457 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1461 case OPT_Wsystem_headers
:
1462 dc
->dc_warn_system_headers
= value
;
1466 opts
->x_flag_gen_aux_info
= 1;
1469 case OPT_auxbase_strip
:
1471 char *tmp
= xstrdup (arg
);
1472 strip_off_ending (tmp
, strlen (tmp
));
1474 opts
->x_aux_base_name
= tmp
;
1479 decode_d_option (arg
, opts
, loc
, dc
);
1482 case OPT_fcall_used_
:
1483 case OPT_fcall_saved_
:
1488 case OPT_fdbg_cnt_list
:
1492 case OPT_fdebug_prefix_map_
:
1496 case OPT_fdiagnostics_show_location_
:
1497 diagnostic_prefixing_rule (dc
) = (diagnostic_prefixing_rule_t
) value
;
1500 case OPT_fdiagnostics_show_caret
:
1501 dc
->show_caret
= value
;
1504 case OPT_fdiagnostics_show_option
:
1505 dc
->show_option_requested
= value
;
1512 case OPT_ffast_math
:
1513 set_fast_math_flags (opts
, value
);
1516 case OPT_funsafe_math_optimizations
:
1517 set_unsafe_math_optimizations_flags (opts
, value
);
1524 case OPT_finline_limit_
:
1525 set_param_value ("max-inline-insns-single", value
/ 2,
1526 opts
->x_param_values
, opts_set
->x_param_values
);
1527 set_param_value ("max-inline-insns-auto", value
/ 2,
1528 opts
->x_param_values
, opts_set
->x_param_values
);
1531 case OPT_finstrument_functions_exclude_function_list_
:
1532 add_comma_separated_to_vector
1533 (&opts
->x_flag_instrument_functions_exclude_functions
, arg
);
1536 case OPT_finstrument_functions_exclude_file_list_
:
1537 add_comma_separated_to_vector
1538 (&opts
->x_flag_instrument_functions_exclude_files
, arg
);
1541 case OPT_fmessage_length_
:
1542 pp_set_line_maximum_length (dc
->printer
, value
);
1543 diagnostic_set_caret_max_width (dc
, value
);
1546 case OPT_fpack_struct_
:
1547 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1549 "structure alignment must be a small power of two, not %d",
1552 opts
->x_initial_max_fld_align
= value
;
1556 case OPT_fplugin_arg_
:
1560 case OPT_fprofile_use_
:
1561 opts
->x_profile_data_prefix
= xstrdup (arg
);
1562 opts
->x_flag_profile_use
= true;
1564 /* No break here - do -fprofile-use processing. */
1565 case OPT_fprofile_use
:
1566 if (!opts_set
->x_flag_branch_probabilities
)
1567 opts
->x_flag_branch_probabilities
= value
;
1568 if (!opts_set
->x_flag_profile_values
)
1569 opts
->x_flag_profile_values
= value
;
1570 if (!opts_set
->x_flag_unroll_loops
)
1571 opts
->x_flag_unroll_loops
= value
;
1572 if (!opts_set
->x_flag_peel_loops
)
1573 opts
->x_flag_peel_loops
= value
;
1574 if (!opts_set
->x_flag_tracer
)
1575 opts
->x_flag_tracer
= value
;
1576 if (!opts_set
->x_flag_value_profile_transformations
)
1577 opts
->x_flag_value_profile_transformations
= value
;
1578 if (!opts_set
->x_flag_inline_functions
)
1579 opts
->x_flag_inline_functions
= value
;
1580 if (!opts_set
->x_flag_ipa_cp
)
1581 opts
->x_flag_ipa_cp
= value
;
1582 if (!opts_set
->x_flag_ipa_cp_clone
1583 && value
&& opts
->x_flag_ipa_cp
)
1584 opts
->x_flag_ipa_cp_clone
= value
;
1585 if (!opts_set
->x_flag_predictive_commoning
)
1586 opts
->x_flag_predictive_commoning
= value
;
1587 if (!opts_set
->x_flag_unswitch_loops
)
1588 opts
->x_flag_unswitch_loops
= value
;
1589 if (!opts_set
->x_flag_gcse_after_reload
)
1590 opts
->x_flag_gcse_after_reload
= value
;
1593 case OPT_fprofile_generate_
:
1594 opts
->x_profile_data_prefix
= xstrdup (arg
);
1596 /* No break here - do -fprofile-generate processing. */
1597 case OPT_fprofile_generate
:
1598 if (!opts_set
->x_profile_arc_flag
)
1599 opts
->x_profile_arc_flag
= value
;
1600 if (!opts_set
->x_flag_profile_values
)
1601 opts
->x_flag_profile_values
= value
;
1602 if (!opts_set
->x_flag_value_profile_transformations
)
1603 opts
->x_flag_value_profile_transformations
= value
;
1604 if (!opts_set
->x_flag_inline_functions
)
1605 opts
->x_flag_inline_functions
= value
;
1606 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
1607 quadratic. Disable the pass until better memory representation
1609 if (!opts_set
->x_flag_ipa_reference
&& opts
->x_in_lto_p
)
1610 opts
->x_flag_ipa_reference
= false;
1613 case OPT_fshow_column
:
1614 dc
->show_column
= value
;
1617 case OPT_frandom_seed
:
1618 /* The real switch is -fno-random-seed. */
1624 case OPT_frandom_seed_
:
1628 case OPT_fsched_verbose_
:
1629 #ifdef INSN_SCHEDULING
1630 /* Handled with Var in common.opt. */
1636 case OPT_fsched_stalled_insns_
:
1637 opts
->x_flag_sched_stalled_insns
= value
;
1638 if (opts
->x_flag_sched_stalled_insns
== 0)
1639 opts
->x_flag_sched_stalled_insns
= -1;
1642 case OPT_fsched_stalled_insns_dep_
:
1643 opts
->x_flag_sched_stalled_insns_dep
= value
;
1646 case OPT_fstack_check_
:
1647 if (!strcmp (arg
, "no"))
1648 opts
->x_flag_stack_check
= NO_STACK_CHECK
;
1649 else if (!strcmp (arg
, "generic"))
1650 /* This is the old stack checking method. */
1651 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1652 ? FULL_BUILTIN_STACK_CHECK
1653 : GENERIC_STACK_CHECK
;
1654 else if (!strcmp (arg
, "specific"))
1655 /* This is the new stack checking method. */
1656 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1657 ? FULL_BUILTIN_STACK_CHECK
1658 : STACK_CHECK_STATIC_BUILTIN
1659 ? STATIC_BUILTIN_STACK_CHECK
1660 : GENERIC_STACK_CHECK
;
1662 warning_at (loc
, 0, "unknown stack check parameter \"%s\"", arg
);
1665 case OPT_fstack_limit
:
1666 /* The real switch is -fno-stack-limit. */
1672 case OPT_fstack_limit_register_
:
1673 case OPT_fstack_limit_symbol_
:
1677 case OPT_fstack_usage
:
1678 opts
->x_flag_stack_usage
= value
;
1679 opts
->x_flag_stack_usage_info
= value
!= 0;
1682 case OPT_ftree_vectorizer_verbose_
:
1683 vect_set_verbosity_level (opts
, value
);
1687 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
, opts
, opts_set
,
1692 set_debug_level (SDB_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1696 if (value
< 2 || value
> 4)
1697 error_at (loc
, "dwarf version %d is not supported", value
);
1699 opts
->x_dwarf_version
= value
;
1700 set_debug_level (DWARF2_DEBUG
, false, "", opts
, opts_set
, loc
);
1704 set_debug_level (NO_DEBUG
, 2, arg
, opts
, opts_set
, loc
);
1709 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
, opts
, opts_set
,
1714 set_debug_level (VMS_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1719 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
, opts
, opts_set
,
1723 case OPT_pedantic_errors
:
1724 opts
->x_pedantic
= 1;
1725 dc
->pedantic_errors
= 1;
1729 opts
->x_flag_lto
= value
? "" : NULL
;
1733 dc
->dc_inhibit_warnings
= true;
1736 case OPT_fmax_errors_
:
1737 dc
->max_errors
= value
;
1740 case OPT_fuse_linker_plugin
:
1741 /* No-op. Used by the driver and passed to us because it starts with f.*/
1744 case OPT_Wuninitialized
:
1745 /* Also turn on maybe uninitialized warning. */
1746 opts
->x_warn_maybe_uninitialized
= value
;
1750 /* If the flag was handled in a standard way, assume the lack of
1751 processing here is intentional. */
1752 gcc_assert (option_flag_var (scode
, opts
));
1759 /* Handle --param NAME=VALUE. */
1761 handle_param (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1762 location_t loc
, const char *carg
)
1767 arg
= xstrdup (carg
);
1768 equal
= strchr (arg
, '=');
1770 error_at (loc
, "%s: --param arguments should be of the form NAME=VALUE",
1774 value
= integral_argument (equal
+ 1);
1776 error_at (loc
, "invalid --param value %qs", equal
+ 1);
1780 set_param_value (arg
, value
,
1781 opts
->x_param_values
, opts_set
->x_param_values
);
1788 /* Used to set the level of strict aliasing warnings in OPTS,
1789 when no level is specified (i.e., when -Wstrict-aliasing, and not
1790 -Wstrict-aliasing=level was given).
1791 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
1792 and 0 otherwise. After calling this function, wstrict_aliasing will be
1793 set to the default value of -Wstrict_aliasing=level, currently 3. */
1795 set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
)
1797 gcc_assert (onoff
== 0 || onoff
== 1);
1799 opts
->x_warn_strict_aliasing
= 3;
1801 opts
->x_warn_strict_aliasing
= 0;
1804 /* The following routines are useful in setting all the flags that
1805 -ffast-math and -fno-fast-math imply. */
1807 set_fast_math_flags (struct gcc_options
*opts
, int set
)
1809 if (!opts
->frontend_set_flag_unsafe_math_optimizations
)
1811 opts
->x_flag_unsafe_math_optimizations
= set
;
1812 set_unsafe_math_optimizations_flags (opts
, set
);
1814 if (!opts
->frontend_set_flag_finite_math_only
)
1815 opts
->x_flag_finite_math_only
= set
;
1816 if (!opts
->frontend_set_flag_errno_math
)
1817 opts
->x_flag_errno_math
= !set
;
1820 if (!opts
->frontend_set_flag_signaling_nans
)
1821 opts
->x_flag_signaling_nans
= 0;
1822 if (!opts
->frontend_set_flag_rounding_math
)
1823 opts
->x_flag_rounding_math
= 0;
1824 if (!opts
->frontend_set_flag_cx_limited_range
)
1825 opts
->x_flag_cx_limited_range
= 1;
1829 /* When -funsafe-math-optimizations is set the following
1830 flags are set as well. */
1832 set_unsafe_math_optimizations_flags (struct gcc_options
*opts
, int set
)
1834 if (!opts
->frontend_set_flag_trapping_math
)
1835 opts
->x_flag_trapping_math
= !set
;
1836 if (!opts
->frontend_set_flag_signed_zeros
)
1837 opts
->x_flag_signed_zeros
= !set
;
1838 if (!opts
->frontend_set_flag_associative_math
)
1839 opts
->x_flag_associative_math
= set
;
1840 if (!opts
->frontend_set_flag_reciprocal_math
)
1841 opts
->x_flag_reciprocal_math
= set
;
1844 /* Return true iff flags in OPTS are set as if -ffast-math. */
1846 fast_math_flags_set_p (const struct gcc_options
*opts
)
1848 return (!opts
->x_flag_trapping_math
1849 && opts
->x_flag_unsafe_math_optimizations
1850 && opts
->x_flag_finite_math_only
1851 && !opts
->x_flag_signed_zeros
1852 && !opts
->x_flag_errno_math
);
1855 /* Return true iff flags are set as if -ffast-math but using the flags stored
1856 in the struct cl_optimization structure. */
1858 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
1860 return (!opt
->x_flag_trapping_math
1861 && opt
->x_flag_unsafe_math_optimizations
1862 && opt
->x_flag_finite_math_only
1863 && !opt
->x_flag_signed_zeros
1864 && !opt
->x_flag_errno_math
);
1867 /* Handle a debug output -g switch for options OPTS
1868 (OPTS_SET->x_write_symbols storing whether a debug type was passed
1869 explicitly), location LOC. EXTENDED is true or false to support
1870 extended output (2 is special and means "-ggdb" was given). */
1872 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
,
1873 struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1876 opts
->x_use_gnu_debug_info_extensions
= extended
;
1878 if (type
== NO_DEBUG
)
1880 if (opts
->x_write_symbols
== NO_DEBUG
)
1882 opts
->x_write_symbols
= PREFERRED_DEBUGGING_TYPE
;
1886 #ifdef DWARF2_DEBUGGING_INFO
1887 opts
->x_write_symbols
= DWARF2_DEBUG
;
1888 #elif defined DBX_DEBUGGING_INFO
1889 opts
->x_write_symbols
= DBX_DEBUG
;
1893 if (opts
->x_write_symbols
== NO_DEBUG
)
1894 warning_at (loc
, 0, "target system does not support debug output");
1899 /* Does it conflict with an already selected type? */
1900 if (opts_set
->x_write_symbols
!= NO_DEBUG
1901 && opts
->x_write_symbols
!= NO_DEBUG
1902 && type
!= opts
->x_write_symbols
)
1903 error_at (loc
, "debug format \"%s\" conflicts with prior selection",
1904 debug_type_names
[type
]);
1905 opts
->x_write_symbols
= type
;
1906 opts_set
->x_write_symbols
= type
;
1909 /* A debug flag without a level defaults to level 2. */
1912 if (!opts
->x_debug_info_level
)
1913 opts
->x_debug_info_level
= DINFO_LEVEL_NORMAL
;
1917 int argval
= integral_argument (arg
);
1919 error_at (loc
, "unrecognised debug output level \"%s\"", arg
);
1920 else if (argval
> 3)
1921 error_at (loc
, "debug output level %s is too high", arg
);
1923 opts
->x_debug_info_level
= (enum debug_info_levels
) argval
;
1927 /* Arrange to dump core on error for diagnostic context DC. (The
1928 regular error message is still printed first, except in the case of
1932 setup_core_dumping (diagnostic_context
*dc
)
1935 signal (SIGABRT
, SIG_DFL
);
1937 #if defined(HAVE_SETRLIMIT)
1940 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
1941 fatal_error ("getting core file size maximum limit: %m");
1942 rlim
.rlim_cur
= rlim
.rlim_max
;
1943 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
1944 fatal_error ("setting core file size limit to maximum: %m");
1947 diagnostic_abort_on_error (dc
);
1950 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
1951 diagnostic context DC. */
1954 decode_d_option (const char *arg
, struct gcc_options
*opts
,
1955 location_t loc
, diagnostic_context
*dc
)
1963 opts
->x_flag_debug_asm
= 1;
1966 opts
->x_flag_print_asm_name
= 1;
1969 opts
->x_flag_dump_rtl_in_asm
= 1;
1970 opts
->x_flag_print_asm_name
= 1;
1973 opts
->x_graph_dump_format
= vcg
;
1976 opts
->x_rtl_dump_and_exit
= 1;
1978 case 'D': /* These are handled by the preprocessor. */
1985 setup_core_dumping (dc
);
1988 opts
->x_flag_dump_all_passed
= true;
1992 warning_at (loc
, 0, "unrecognized gcc debugging option: %c", c
);
1997 /* Enable (or disable if VALUE is 0) a warning option ARG (language
1998 mask LANG_MASK, option handlers HANDLERS) as an error for option
1999 structures OPTS and OPTS_SET, diagnostic context DC (possibly
2000 NULL), location LOC. This is used by -Werror=. */
2003 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
,
2004 const struct cl_option_handlers
*handlers
,
2005 struct gcc_options
*opts
,
2006 struct gcc_options
*opts_set
,
2007 location_t loc
, diagnostic_context
*dc
)
2012 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2013 new_option
[0] = 'W';
2014 strcpy (new_option
+ 1, arg
);
2015 option_index
= find_opt (new_option
, lang_mask
);
2016 if (option_index
== OPT_SPECIAL_unknown
)
2018 error_at (loc
, "-Werror=%s: no option -%s", arg
, new_option
);
2022 const diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
2024 control_warning_option (option_index
, (int) kind
, value
,
2026 handlers
, opts
, opts_set
, dc
);
2027 if (option_index
== OPT_Wuninitialized
)
2028 enable_warning_as_error ("maybe-uninitialized", value
, lang_mask
,
2029 handlers
, opts
, opts_set
, loc
, dc
);
2034 /* Return malloced memory for the name of the option OPTION_INDEX
2035 which enabled a diagnostic (context CONTEXT), originally of type
2036 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
2040 option_name (diagnostic_context
*context
, int option_index
,
2041 diagnostic_t orig_diag_kind
, diagnostic_t diag_kind
)
2045 /* A warning classified as an error. */
2046 if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
)
2047 && diag_kind
== DK_ERROR
)
2048 return concat (cl_options
[OPT_Werror_
].opt_text
,
2049 /* Skip over "-W". */
2050 cl_options
[option_index
].opt_text
+ 2,
2052 /* A warning with option. */
2054 return xstrdup (cl_options
[option_index
].opt_text
);
2056 /* A warning without option classified as an error. */
2057 else if (orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
2058 || diag_kind
== DK_WARNING
)
2060 if (context
->warning_as_error_requested
)
2061 return xstrdup (cl_options
[OPT_Werror
].opt_text
);
2063 return xstrdup (_("enabled by default"));