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 },
503 /* -Ofast adds optimizations to -O3. */
504 { OPT_LEVELS_FAST
, OPT_ffast_math
, NULL
, 1 },
506 { OPT_LEVELS_NONE
, 0, NULL
, 0 }
509 /* Default the options in OPTS and OPTS_SET based on the optimization
510 settings in DECODED_OPTIONS and DECODED_OPTIONS_COUNT. */
512 default_options_optimization (struct gcc_options
*opts
,
513 struct gcc_options
*opts_set
,
514 struct cl_decoded_option
*decoded_options
,
515 unsigned int decoded_options_count
,
517 unsigned int lang_mask
,
518 const struct cl_option_handlers
*handlers
,
519 diagnostic_context
*dc
)
524 /* Scan to see what optimization level has been specified. That will
525 determine the default value of many flags. */
526 for (i
= 1; i
< decoded_options_count
; i
++)
528 struct cl_decoded_option
*opt
= &decoded_options
[i
];
529 switch (opt
->opt_index
)
532 if (*opt
->arg
== '\0')
534 opts
->x_optimize
= 1;
535 opts
->x_optimize_size
= 0;
536 opts
->x_optimize_fast
= 0;
540 const int optimize_val
= integral_argument (opt
->arg
);
541 if (optimize_val
== -1)
543 "argument to %qs should be a non-negative integer",
547 opts
->x_optimize
= optimize_val
;
548 if ((unsigned int) opts
->x_optimize
> 255)
549 opts
->x_optimize
= 255;
550 opts
->x_optimize_size
= 0;
551 opts
->x_optimize_fast
= 0;
557 opts
->x_optimize_size
= 1;
559 /* Optimizing for size forces optimize to be 2. */
560 opts
->x_optimize
= 2;
561 opts
->x_optimize_fast
= 0;
565 /* -Ofast only adds flags to -O3. */
566 opts
->x_optimize_size
= 0;
567 opts
->x_optimize
= 3;
568 opts
->x_optimize_fast
= 1;
572 /* Ignore other options in this prescan. */
577 maybe_default_options (opts
, opts_set
, default_options_table
,
578 opts
->x_optimize
, opts
->x_optimize_size
,
579 opts
->x_optimize_fast
, lang_mask
, handlers
, loc
, dc
);
581 /* -O2 param settings. */
582 opt2
= (opts
->x_optimize
>= 2);
584 /* Track fields in field-sensitive alias analysis. */
585 maybe_set_param_value
586 (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
,
587 opt2
? 100 : default_param_value (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
),
588 opts
->x_param_values
, opts_set
->x_param_values
);
590 /* For -O1 only do loop invariant motion for very small loops. */
591 maybe_set_param_value
592 (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
,
593 opt2
? default_param_value (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
) : 1000,
594 opts
->x_param_values
, opts_set
->x_param_values
);
596 if (opts
->x_optimize_size
)
597 /* We want to crossjump as much as possible. */
598 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
, 1,
599 opts
->x_param_values
, opts_set
->x_param_values
);
601 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
,
602 default_param_value (PARAM_MIN_CROSSJUMP_INSNS
),
603 opts
->x_param_values
, opts_set
->x_param_values
);
605 /* Allow default optimizations to be specified on a per-machine basis. */
606 maybe_default_options (opts
, opts_set
,
607 targetm_common
.option_optimization_table
,
608 opts
->x_optimize
, opts
->x_optimize_size
,
609 opts
->x_optimize_fast
, lang_mask
, handlers
, loc
, dc
);
612 /* After all options at LOC have been read into OPTS and OPTS_SET,
613 finalize settings of those options and diagnose incompatible
616 finish_options (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
619 enum unwind_info_type ui_except
;
621 if (opts
->x_dump_base_name
&& ! IS_ABSOLUTE_PATH (opts
->x_dump_base_name
))
623 /* First try to make OPTS->X_DUMP_BASE_NAME relative to the
624 OPTS->X_DUMP_DIR_NAME directory. Then try to make
625 OPTS->X_DUMP_BASE_NAME relative to the OPTS->X_AUX_BASE_NAME
626 directory, typically the directory to contain the object
628 if (opts
->x_dump_dir_name
)
629 opts
->x_dump_base_name
= concat (opts
->x_dump_dir_name
,
630 opts
->x_dump_base_name
, NULL
);
631 else if (opts
->x_aux_base_name
632 && strcmp (opts
->x_aux_base_name
, HOST_BIT_BUCKET
) != 0)
634 const char *aux_base
;
636 base_of_path (opts
->x_aux_base_name
, &aux_base
);
637 if (opts
->x_aux_base_name
!= aux_base
)
639 int dir_len
= aux_base
- opts
->x_aux_base_name
;
640 char *new_dump_base_name
=
641 XNEWVEC (char, strlen (opts
->x_dump_base_name
) + dir_len
+ 1);
643 /* Copy directory component from OPTS->X_AUX_BASE_NAME. */
644 memcpy (new_dump_base_name
, opts
->x_aux_base_name
, dir_len
);
645 /* Append existing OPTS->X_DUMP_BASE_NAME. */
646 strcpy (new_dump_base_name
+ dir_len
, opts
->x_dump_base_name
);
647 opts
->x_dump_base_name
= new_dump_base_name
;
652 /* Handle related options for unit-at-a-time, toplevel-reorder, and
654 if (!opts
->x_flag_unit_at_a_time
)
656 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
657 error_at (loc
, "section anchors must be disabled when unit-at-a-time "
659 opts
->x_flag_section_anchors
= 0;
660 if (opts
->x_flag_toplevel_reorder
== 1)
661 error_at (loc
, "toplevel reorder must be disabled when unit-at-a-time "
663 opts
->x_flag_toplevel_reorder
= 0;
666 if (opts
->x_flag_tm
&& opts
->x_flag_non_call_exceptions
)
667 sorry ("transactional memory is not supported with non-call exceptions");
669 if (opts
->x_flag_tm
&& opts
->x_flag_non_call_exceptions
)
670 sorry ("transactional memory is not supported with non-call exceptions");
672 /* -Wmissing-noreturn is alias for -Wsuggest-attribute=noreturn. */
673 if (opts
->x_warn_missing_noreturn
)
674 opts
->x_warn_suggest_attribute_noreturn
= true;
676 /* Unless the user has asked for section anchors, we disable toplevel
677 reordering at -O0 to disable transformations that might be surprising
678 to end users and to get -fno-toplevel-reorder tested. */
679 if (!opts
->x_optimize
680 && opts
->x_flag_toplevel_reorder
== 2
681 && !(opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
))
683 opts
->x_flag_toplevel_reorder
= 0;
684 opts
->x_flag_section_anchors
= 0;
686 if (!opts
->x_flag_toplevel_reorder
)
688 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
689 error_at (loc
, "section anchors must be disabled when toplevel reorder"
691 opts
->x_flag_section_anchors
= 0;
694 if (!opts
->x_flag_opts_finished
)
696 if (opts
->x_flag_pie
)
697 opts
->x_flag_pic
= opts
->x_flag_pie
;
698 if (opts
->x_flag_pic
&& !opts
->x_flag_pie
)
699 opts
->x_flag_shlib
= 1;
700 opts
->x_flag_opts_finished
= true;
703 if (opts
->x_optimize
== 0)
705 /* Inlining does not work if not optimizing,
706 so force it not to be done. */
707 opts
->x_warn_inline
= 0;
708 opts
->x_flag_no_inline
= 1;
711 /* The optimization to partition hot and cold basic blocks into separate
712 sections of the .o and executable files does not work (currently)
713 with exception handling. This is because there is no support for
714 generating unwind info. If opts->x_flag_exceptions is turned on
715 we need to turn off the partitioning optimization. */
717 ui_except
= targetm_common
.except_unwind_info (opts
);
719 if (opts
->x_flag_exceptions
720 && opts
->x_flag_reorder_blocks_and_partition
721 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))
724 "-freorder-blocks-and-partition does not work "
725 "with exceptions on this architecture");
726 opts
->x_flag_reorder_blocks_and_partition
= 0;
727 opts
->x_flag_reorder_blocks
= 1;
730 /* If user requested unwind info, then turn off the partitioning
733 if (opts
->x_flag_unwind_tables
734 && !targetm_common
.unwind_tables_default
735 && opts
->x_flag_reorder_blocks_and_partition
736 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))
739 "-freorder-blocks-and-partition does not support "
740 "unwind info on this architecture");
741 opts
->x_flag_reorder_blocks_and_partition
= 0;
742 opts
->x_flag_reorder_blocks
= 1;
745 /* If the target requested unwind info, then turn off the partitioning
746 optimization with a different message. Likewise, if the target does not
747 support named sections. */
749 if (opts
->x_flag_reorder_blocks_and_partition
750 && (!targetm_common
.have_named_sections
751 || (opts
->x_flag_unwind_tables
752 && targetm_common
.unwind_tables_default
753 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))))
756 "-freorder-blocks-and-partition does not work "
757 "on this architecture");
758 opts
->x_flag_reorder_blocks_and_partition
= 0;
759 opts
->x_flag_reorder_blocks
= 1;
762 if (opts
->x_flag_reorder_blocks_and_partition
763 && !opts_set
->x_flag_reorder_functions
)
764 opts
->x_flag_reorder_functions
= 1;
766 /* Pipelining of outer loops is only possible when general pipelining
767 capabilities are requested. */
768 if (!opts
->x_flag_sel_sched_pipelining
)
769 opts
->x_flag_sel_sched_pipelining_outer_loops
= 0;
771 if (opts
->x_flag_conserve_stack
)
773 maybe_set_param_value (PARAM_LARGE_STACK_FRAME
, 100,
774 opts
->x_param_values
, opts_set
->x_param_values
);
775 maybe_set_param_value (PARAM_STACK_FRAME_GROWTH
, 40,
776 opts
->x_param_values
, opts_set
->x_param_values
);
779 if (opts
->x_flag_lto
)
782 opts
->x_flag_generate_lto
= 1;
784 /* When generating IL, do not operate in whole-program mode.
785 Otherwise, symbols will be privatized too early, causing link
787 opts
->x_flag_whole_program
= 0;
789 error_at (loc
, "LTO support has not been enabled in this configuration");
791 if (!opts
->x_flag_fat_lto_objects
&& !HAVE_LTO_PLUGIN
)
792 error_at (loc
, "-fno-fat-lto-objects are supported only with linker plugin.");
794 if ((opts
->x_flag_lto_partition_balanced
!= 0) + (opts
->x_flag_lto_partition_1to1
!= 0)
795 + (opts
->x_flag_lto_partition_none
!= 0) >= 1)
797 if ((opts
->x_flag_lto_partition_balanced
!= 0)
798 + (opts
->x_flag_lto_partition_1to1
!= 0)
799 + (opts
->x_flag_lto_partition_none
!= 0) > 1)
800 error_at (loc
, "only one -flto-partition value can be specified");
803 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
804 default value if they choose based on other options. */
805 if (opts
->x_flag_split_stack
== -1)
806 opts
->x_flag_split_stack
= 0;
807 else if (opts
->x_flag_split_stack
)
809 if (!targetm_common
.supports_split_stack (true, opts
))
811 error_at (loc
, "%<-fsplit-stack%> is not supported by "
812 "this compiler configuration");
813 opts
->x_flag_split_stack
= 0;
817 /* Set PARAM_MAX_STORES_TO_SINK to 0 if either vectorization or if-conversion
819 if (!opts
->x_flag_tree_vectorize
|| !opts
->x_flag_tree_loop_if_convert
)
820 maybe_set_param_value (PARAM_MAX_STORES_TO_SINK
, 0,
821 opts
->x_param_values
, opts_set
->x_param_values
);
823 /* This replaces set_Wunused. */
824 if (opts
->x_warn_unused_function
== -1)
825 opts
->x_warn_unused_function
= opts
->x_warn_unused
;
826 if (opts
->x_warn_unused_label
== -1)
827 opts
->x_warn_unused_label
= opts
->x_warn_unused
;
828 /* Wunused-parameter is enabled if both -Wunused -Wextra are enabled. */
829 if (opts
->x_warn_unused_parameter
== -1)
830 opts
->x_warn_unused_parameter
= (opts
->x_warn_unused
831 && opts
->x_extra_warnings
);
832 if (opts
->x_warn_unused_variable
== -1)
833 opts
->x_warn_unused_variable
= opts
->x_warn_unused
;
834 /* Wunused-but-set-parameter is enabled if both -Wunused -Wextra are
836 if (opts
->x_warn_unused_but_set_parameter
== -1)
837 opts
->x_warn_unused_but_set_parameter
= (opts
->x_warn_unused
838 && opts
->x_extra_warnings
);
839 if (opts
->x_warn_unused_but_set_variable
== -1)
840 opts
->x_warn_unused_but_set_variable
= opts
->x_warn_unused
;
841 if (opts
->x_warn_unused_value
== -1)
842 opts
->x_warn_unused_value
= opts
->x_warn_unused
;
844 /* This replaces set_Wextra. */
845 if (opts
->x_warn_uninitialized
== -1)
846 opts
->x_warn_uninitialized
= opts
->x_extra_warnings
;
849 #define LEFT_COLUMN 27
851 /* Output ITEM, of length ITEM_WIDTH, in the left column,
852 followed by word-wrapped HELP in a second column. */
854 wrap_help (const char *help
,
856 unsigned int item_width
,
857 unsigned int columns
)
859 unsigned int col_width
= LEFT_COLUMN
;
860 unsigned int remaining
, room
, len
;
862 remaining
= strlen (help
);
866 room
= columns
- 3 - MAX (col_width
, item_width
);
875 for (i
= 0; help
[i
]; i
++)
877 if (i
>= room
&& len
!= remaining
)
881 else if ((help
[i
] == '-' || help
[i
] == '/')
882 && help
[i
+ 1] != ' '
883 && i
> 0 && ISALPHA (help
[i
- 1]))
888 printf( " %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
890 while (help
[len
] == ' ')
898 /* Print help for a specific front-end, etc. */
900 print_filtered_help (unsigned int include_flags
,
901 unsigned int exclude_flags
,
902 unsigned int any_flags
,
903 unsigned int columns
,
904 struct gcc_options
*opts
,
905 unsigned int lang_mask
)
910 bool displayed
= false;
912 if (include_flags
== CL_PARAMS
)
914 for (i
= 0; i
< LAST_PARAM
; i
++)
916 const char *param
= compiler_params
[i
].option
;
918 help
= compiler_params
[i
].help
;
919 if (help
== NULL
|| *help
== '\0')
921 if (exclude_flags
& CL_UNDOCUMENTED
)
923 help
= undocumented_msg
;
926 /* Get the translation. */
929 wrap_help (help
, param
, strlen (param
), columns
);
935 if (!opts
->x_help_printed
)
936 opts
->x_help_printed
= XCNEWVAR (char, cl_options_count
);
938 if (!opts
->x_help_enum_printed
)
939 opts
->x_help_enum_printed
= XCNEWVAR (char, cl_enums_count
);
941 for (i
= 0; i
< cl_options_count
; i
++)
944 const struct cl_option
*option
= cl_options
+ i
;
949 if (include_flags
== 0
950 || ((option
->flags
& include_flags
) != include_flags
))
952 if ((option
->flags
& any_flags
) == 0)
956 /* Skip unwanted switches. */
957 if ((option
->flags
& exclude_flags
) != 0)
960 /* The driver currently prints its own help text. */
961 if ((option
->flags
& CL_DRIVER
) != 0
962 && (option
->flags
& (((1U << cl_lang_count
) - 1)
963 | CL_COMMON
| CL_TARGET
)) == 0)
967 /* Skip switches that have already been printed. */
968 if (opts
->x_help_printed
[i
])
971 opts
->x_help_printed
[i
] = true;
976 if (exclude_flags
& CL_UNDOCUMENTED
)
978 help
= undocumented_msg
;
981 /* Get the translation. */
984 /* Find the gap between the name of the
985 option and its descriptive text. */
986 tab
= strchr (help
, '\t');
995 opt
= option
->opt_text
;
999 /* With the -Q option enabled we change the descriptive text associated
1000 with an option to be an indication of its current setting. */
1001 if (!opts
->x_quiet_flag
)
1003 void *flag_var
= option_flag_var (i
, opts
);
1005 if (len
< (LEFT_COLUMN
+ 2))
1006 strcpy (new_help
, "\t\t");
1008 strcpy (new_help
, "\t");
1010 if (flag_var
!= NULL
1011 && option
->var_type
!= CLVC_DEFER
)
1013 if (option
->flags
& CL_JOINED
)
1015 if (option
->var_type
== CLVC_STRING
)
1017 if (* (const char **) flag_var
!= NULL
)
1018 snprintf (new_help
+ strlen (new_help
),
1019 sizeof (new_help
) - strlen (new_help
),
1020 * (const char **) flag_var
);
1022 else if (option
->var_type
== CLVC_ENUM
)
1024 const struct cl_enum
*e
= &cl_enums
[option
->var_enum
];
1026 const char *arg
= NULL
;
1028 value
= e
->get (flag_var
);
1029 enum_value_to_arg (e
->values
, &arg
, value
, lang_mask
);
1031 arg
= _("[default]");
1032 snprintf (new_help
+ strlen (new_help
),
1033 sizeof (new_help
) - strlen (new_help
),
1037 sprintf (new_help
+ strlen (new_help
),
1038 "%#x", * (int *) flag_var
);
1041 strcat (new_help
, option_enabled (i
, opts
)
1042 ? _("[enabled]") : _("[disabled]"));
1048 wrap_help (help
, opt
, len
, columns
);
1051 if (option
->var_type
== CLVC_ENUM
1052 && opts
->x_help_enum_printed
[option
->var_enum
] != 2)
1053 opts
->x_help_enum_printed
[option
->var_enum
] = 1;
1058 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1061 printf (_(" No options with the desired characteristics were found\n"));
1066 /* PR 31349: Tell the user how to see all of the
1067 options supported by a specific front end. */
1068 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1069 if ((1U << i
) & langs
)
1070 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1071 lang_names
[i
], lang_names
[i
]);
1075 else if (! displayed
)
1076 printf (_(" All options with the desired characteristics have already been displayed\n"));
1080 /* Print details of enumerated option arguments, if those
1081 enumerations have help text headings provided. If no help text
1082 is provided, presume that the possible values are listed in the
1083 help text for the relevant options. */
1084 for (i
= 0; i
< cl_enums_count
; i
++)
1086 unsigned int j
, pos
;
1088 if (opts
->x_help_enum_printed
[i
] != 1)
1090 if (cl_enums
[i
].help
== NULL
)
1092 printf (" %s\n ", _(cl_enums
[i
].help
));
1094 for (j
= 0; cl_enums
[i
].values
[j
].arg
!= NULL
; j
++)
1096 unsigned int len
= strlen (cl_enums
[i
].values
[j
].arg
);
1098 if (pos
> 4 && pos
+ 1 + len
<= columns
)
1100 printf (" %s", cl_enums
[i
].values
[j
].arg
);
1110 printf ("%s", cl_enums
[i
].values
[j
].arg
);
1115 opts
->x_help_enum_printed
[i
] = 2;
1119 /* Display help for a specified type of option.
1120 The options must have ALL of the INCLUDE_FLAGS set
1121 ANY of the flags in the ANY_FLAGS set
1122 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1123 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1125 print_specific_help (unsigned int include_flags
,
1126 unsigned int exclude_flags
,
1127 unsigned int any_flags
,
1128 struct gcc_options
*opts
,
1129 unsigned int lang_mask
)
1131 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1132 const char * description
= NULL
;
1133 const char * descrip_extra
= "";
1137 /* Sanity check: Make sure that we do not have more
1138 languages than we have bits available to enumerate them. */
1139 gcc_assert ((1U << cl_lang_count
) <= CL_MIN_OPTION_CLASS
);
1141 /* If we have not done so already, obtain
1142 the desired maximum width of the output. */
1143 if (opts
->x_help_columns
== 0)
1147 p
= getenv ("COLUMNS");
1150 int value
= atoi (p
);
1153 opts
->x_help_columns
= value
;
1156 if (opts
->x_help_columns
== 0)
1157 /* Use a reasonable default. */
1158 opts
->x_help_columns
= 80;
1161 /* Decide upon the title for the options that we are going to display. */
1162 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1164 switch (flag
& include_flags
)
1171 description
= _("The following options are target specific");
1174 description
= _("The following options control compiler warning messages");
1176 case CL_OPTIMIZATION
:
1177 description
= _("The following options control optimizations");
1180 description
= _("The following options are language-independent");
1183 description
= _("The --param option recognizes the following as parameters");
1186 if (i
>= cl_lang_count
)
1188 if (exclude_flags
& all_langs_mask
)
1189 description
= _("The following options are specific to just the language ");
1191 description
= _("The following options are supported by the language ");
1192 descrip_extra
= lang_names
[i
];
1197 if (description
== NULL
)
1201 if (include_flags
& CL_UNDOCUMENTED
)
1202 description
= _("The following options are not documented");
1203 else if (include_flags
& CL_SEPARATE
)
1204 description
= _("The following options take separate arguments");
1205 else if (include_flags
& CL_JOINED
)
1206 description
= _("The following options take joined arguments");
1209 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1216 if (any_flags
& all_langs_mask
)
1217 description
= _("The following options are language-related");
1219 description
= _("The following options are language-independent");
1223 printf ("%s%s:\n", description
, descrip_extra
);
1224 print_filtered_help (include_flags
, exclude_flags
, any_flags
,
1225 opts
->x_help_columns
, opts
, lang_mask
);
1228 /* Handle target- and language-independent options. Return zero to
1229 generate an "unknown option" message. Only options that need
1230 extra handling need to be listed here; if you simply want
1231 DECODED->value assigned to a variable, it happens automatically. */
1234 common_handle_option (struct gcc_options
*opts
,
1235 struct gcc_options
*opts_set
,
1236 const struct cl_decoded_option
*decoded
,
1237 unsigned int lang_mask
, int kind ATTRIBUTE_UNUSED
,
1239 const struct cl_option_handlers
*handlers
,
1240 diagnostic_context
*dc
)
1242 size_t scode
= decoded
->opt_index
;
1243 const char *arg
= decoded
->arg
;
1244 int value
= decoded
->value
;
1245 enum opt_code code
= (enum opt_code
) scode
;
1247 gcc_assert (decoded
->canonical_option_num_elements
<= 2);
1252 handle_param (opts
, opts_set
, loc
, arg
);
1257 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1258 unsigned int undoc_mask
;
1261 if (lang_mask
== CL_DRIVER
)
1264 undoc_mask
= ((opts
->x_verbose_flag
| opts
->x_extra_warnings
)
1267 /* First display any single language specific options. */
1268 for (i
= 0; i
< cl_lang_count
; i
++)
1270 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0, opts
,
1272 /* Next display any multi language specific options. */
1273 print_specific_help (0, undoc_mask
, all_langs_mask
, opts
, lang_mask
);
1274 /* Then display any remaining, non-language options. */
1275 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1277 print_specific_help (i
, undoc_mask
, 0, opts
, lang_mask
);
1278 opts
->x_exit_after_options
= true;
1282 case OPT__target_help
:
1283 if (lang_mask
== CL_DRIVER
)
1286 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0, opts
, lang_mask
);
1287 opts
->x_exit_after_options
= true;
1292 const char * a
= arg
;
1293 unsigned int include_flags
= 0;
1294 /* Note - by default we include undocumented options when listing
1295 specific classes. If you only want to see documented options
1296 then add ",^undocumented" to the --help= option. E.g.:
1298 --help=target,^undocumented */
1299 unsigned int exclude_flags
= 0;
1301 if (lang_mask
== CL_DRIVER
)
1304 /* Walk along the argument string, parsing each word in turn.
1306 arg = [^]{word}[,{arg}]
1307 word = {optimizers|target|warnings|undocumented|
1308 params|common|<language>} */
1313 const char * string
;
1318 { "optimizers", CL_OPTIMIZATION
},
1319 { "target", CL_TARGET
},
1320 { "warnings", CL_WARNING
},
1321 { "undocumented", CL_UNDOCUMENTED
},
1322 { "params", CL_PARAMS
},
1323 { "joined", CL_JOINED
},
1324 { "separate", CL_SEPARATE
},
1325 { "common", CL_COMMON
},
1328 unsigned int * pflags
;
1330 unsigned int lang_flag
, specific_flag
;
1337 pflags
= & exclude_flags
;
1340 pflags
= & include_flags
;
1342 comma
= strchr (a
, ',');
1353 /* Check to see if the string matches an option class name. */
1354 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1355 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1357 specific_flag
= specifics
[i
].flag
;
1361 /* Check to see if the string matches a language name.
1362 Note - we rely upon the alpha-sorted nature of the entries in
1363 the lang_names array, specifically that shorter names appear
1364 before their longer variants. (i.e. C before C++). That way
1365 when we are attempting to match --help=c for example we will
1366 match with C first and not C++. */
1367 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1368 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1370 lang_flag
= 1U << i
;
1374 if (specific_flag
!= 0)
1377 * pflags
|= specific_flag
;
1380 /* The option's argument matches both the start of a
1381 language name and the start of an option class name.
1382 We have a special case for when the user has
1383 specified "--help=c", but otherwise we have to issue
1385 if (strncasecmp (a
, "c", len
) == 0)
1386 * pflags
|= lang_flag
;
1389 "--help argument %q.*s is ambiguous, "
1390 "please be more specific",
1394 else if (lang_flag
!= 0)
1395 * pflags
|= lang_flag
;
1398 "unrecognized argument to --help= option: %q.*s",
1407 print_specific_help (include_flags
, exclude_flags
, 0, opts
,
1409 opts
->x_exit_after_options
= true;
1414 if (lang_mask
== CL_DRIVER
)
1417 opts
->x_exit_after_options
= true;
1423 /* Currently handled in a prescan. */
1427 if (lang_mask
== CL_DRIVER
)
1430 enable_warning_as_error (arg
, value
, lang_mask
, handlers
,
1431 opts
, opts_set
, loc
, dc
);
1434 case OPT_Wlarger_than_
:
1435 opts
->x_larger_than_size
= value
;
1436 opts
->x_warn_larger_than
= value
!= -1;
1439 case OPT_Wfatal_errors
:
1440 dc
->fatal_errors
= value
;
1443 case OPT_Wframe_larger_than_
:
1444 opts
->x_frame_larger_than_size
= value
;
1445 opts
->x_warn_frame_larger_than
= value
!= -1;
1448 case OPT_Wstack_usage_
:
1449 opts
->x_warn_stack_usage
= value
;
1450 opts
->x_flag_stack_usage_info
= value
!= -1;
1453 case OPT_Wstrict_aliasing
:
1454 set_Wstrict_aliasing (opts
, value
);
1457 case OPT_Wstrict_overflow
:
1458 opts
->x_warn_strict_overflow
= (value
1459 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1463 case OPT_Wsystem_headers
:
1464 dc
->dc_warn_system_headers
= value
;
1468 opts
->x_flag_gen_aux_info
= 1;
1471 case OPT_auxbase_strip
:
1473 char *tmp
= xstrdup (arg
);
1474 strip_off_ending (tmp
, strlen (tmp
));
1476 opts
->x_aux_base_name
= tmp
;
1481 decode_d_option (arg
, opts
, loc
, dc
);
1484 case OPT_fcall_used_
:
1485 case OPT_fcall_saved_
:
1490 case OPT_fdbg_cnt_list
:
1494 case OPT_fdebug_prefix_map_
:
1498 case OPT_fdiagnostics_show_location_
:
1499 diagnostic_prefixing_rule (dc
) = (diagnostic_prefixing_rule_t
) value
;
1502 case OPT_fdiagnostics_show_option
:
1503 dc
->show_option_requested
= value
;
1510 case OPT_ffast_math
:
1511 set_fast_math_flags (opts
, value
);
1514 case OPT_funsafe_math_optimizations
:
1515 set_unsafe_math_optimizations_flags (opts
, value
);
1522 case OPT_finline_limit_
:
1523 set_param_value ("max-inline-insns-single", value
/ 2,
1524 opts
->x_param_values
, opts_set
->x_param_values
);
1525 set_param_value ("max-inline-insns-auto", value
/ 2,
1526 opts
->x_param_values
, opts_set
->x_param_values
);
1529 case OPT_finstrument_functions_exclude_function_list_
:
1530 add_comma_separated_to_vector
1531 (&opts
->x_flag_instrument_functions_exclude_functions
, arg
);
1534 case OPT_finstrument_functions_exclude_file_list_
:
1535 add_comma_separated_to_vector
1536 (&opts
->x_flag_instrument_functions_exclude_files
, arg
);
1539 case OPT_fmessage_length_
:
1540 pp_set_line_maximum_length (dc
->printer
, value
);
1543 case OPT_fpack_struct_
:
1544 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1546 "structure alignment must be a small power of two, not %d",
1549 opts
->x_initial_max_fld_align
= value
;
1553 case OPT_fplugin_arg_
:
1557 case OPT_fprofile_use_
:
1558 opts
->x_profile_data_prefix
= xstrdup (arg
);
1559 opts
->x_flag_profile_use
= true;
1561 /* No break here - do -fprofile-use processing. */
1562 case OPT_fprofile_use
:
1563 if (!opts_set
->x_flag_branch_probabilities
)
1564 opts
->x_flag_branch_probabilities
= value
;
1565 if (!opts_set
->x_flag_profile_values
)
1566 opts
->x_flag_profile_values
= value
;
1567 if (!opts_set
->x_flag_unroll_loops
)
1568 opts
->x_flag_unroll_loops
= value
;
1569 if (!opts_set
->x_flag_peel_loops
)
1570 opts
->x_flag_peel_loops
= value
;
1571 if (!opts_set
->x_flag_tracer
)
1572 opts
->x_flag_tracer
= value
;
1573 if (!opts_set
->x_flag_value_profile_transformations
)
1574 opts
->x_flag_value_profile_transformations
= value
;
1575 if (!opts_set
->x_flag_inline_functions
)
1576 opts
->x_flag_inline_functions
= value
;
1577 if (!opts_set
->x_flag_ipa_cp
)
1578 opts
->x_flag_ipa_cp
= value
;
1579 if (!opts_set
->x_flag_ipa_cp_clone
1580 && value
&& opts
->x_flag_ipa_cp
)
1581 opts
->x_flag_ipa_cp_clone
= value
;
1582 if (!opts_set
->x_flag_predictive_commoning
)
1583 opts
->x_flag_predictive_commoning
= value
;
1584 if (!opts_set
->x_flag_unswitch_loops
)
1585 opts
->x_flag_unswitch_loops
= value
;
1586 if (!opts_set
->x_flag_gcse_after_reload
)
1587 opts
->x_flag_gcse_after_reload
= value
;
1590 case OPT_fprofile_generate_
:
1591 opts
->x_profile_data_prefix
= xstrdup (arg
);
1593 /* No break here - do -fprofile-generate processing. */
1594 case OPT_fprofile_generate
:
1595 if (!opts_set
->x_profile_arc_flag
)
1596 opts
->x_profile_arc_flag
= value
;
1597 if (!opts_set
->x_flag_profile_values
)
1598 opts
->x_flag_profile_values
= value
;
1599 if (!opts_set
->x_flag_value_profile_transformations
)
1600 opts
->x_flag_value_profile_transformations
= value
;
1601 if (!opts_set
->x_flag_inline_functions
)
1602 opts
->x_flag_inline_functions
= value
;
1603 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
1604 quadratic. Disable the pass until better memory representation
1606 if (!opts_set
->x_flag_ipa_reference
&& opts
->x_in_lto_p
)
1607 opts
->x_flag_ipa_reference
= false;
1610 case OPT_fshow_column
:
1611 dc
->show_column
= value
;
1614 case OPT_frandom_seed
:
1615 /* The real switch is -fno-random-seed. */
1621 case OPT_frandom_seed_
:
1625 case OPT_fsched_verbose_
:
1626 #ifdef INSN_SCHEDULING
1627 /* Handled with Var in common.opt. */
1633 case OPT_fsched_stalled_insns_
:
1634 opts
->x_flag_sched_stalled_insns
= value
;
1635 if (opts
->x_flag_sched_stalled_insns
== 0)
1636 opts
->x_flag_sched_stalled_insns
= -1;
1639 case OPT_fsched_stalled_insns_dep_
:
1640 opts
->x_flag_sched_stalled_insns_dep
= value
;
1643 case OPT_fstack_check_
:
1644 if (!strcmp (arg
, "no"))
1645 opts
->x_flag_stack_check
= NO_STACK_CHECK
;
1646 else if (!strcmp (arg
, "generic"))
1647 /* This is the old stack checking method. */
1648 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1649 ? FULL_BUILTIN_STACK_CHECK
1650 : GENERIC_STACK_CHECK
;
1651 else if (!strcmp (arg
, "specific"))
1652 /* This is the new stack checking method. */
1653 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1654 ? FULL_BUILTIN_STACK_CHECK
1655 : STACK_CHECK_STATIC_BUILTIN
1656 ? STATIC_BUILTIN_STACK_CHECK
1657 : GENERIC_STACK_CHECK
;
1659 warning_at (loc
, 0, "unknown stack check parameter \"%s\"", arg
);
1662 case OPT_fstack_limit
:
1663 /* The real switch is -fno-stack-limit. */
1669 case OPT_fstack_limit_register_
:
1670 case OPT_fstack_limit_symbol_
:
1674 case OPT_fstack_usage
:
1675 opts
->x_flag_stack_usage
= value
;
1676 opts
->x_flag_stack_usage_info
= value
!= 0;
1679 case OPT_ftree_vectorizer_verbose_
:
1680 vect_set_verbosity_level (opts
, value
);
1684 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
, opts
, opts_set
,
1689 set_debug_level (SDB_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1693 if (value
< 2 || value
> 4)
1694 error_at (loc
, "dwarf version %d is not supported", value
);
1696 opts
->x_dwarf_version
= value
;
1697 set_debug_level (DWARF2_DEBUG
, false, "", opts
, opts_set
, loc
);
1701 set_debug_level (NO_DEBUG
, 2, arg
, opts
, opts_set
, loc
);
1706 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
, opts
, opts_set
,
1711 set_debug_level (VMS_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1716 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
, opts
, opts_set
,
1720 case OPT_pedantic_errors
:
1721 opts
->x_pedantic
= 1;
1722 dc
->pedantic_errors
= 1;
1726 opts
->x_flag_lto
= value
? "" : NULL
;
1730 dc
->dc_inhibit_warnings
= true;
1733 case OPT_fmax_errors_
:
1734 dc
->max_errors
= value
;
1737 case OPT_fuse_linker_plugin
:
1738 /* No-op. Used by the driver and passed to us because it starts with f.*/
1741 case OPT_Wuninitialized
:
1742 /* Also turn on maybe uninitialized warning. */
1743 opts
->x_warn_maybe_uninitialized
= value
;
1747 /* If the flag was handled in a standard way, assume the lack of
1748 processing here is intentional. */
1749 gcc_assert (option_flag_var (scode
, opts
));
1756 /* Handle --param NAME=VALUE. */
1758 handle_param (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1759 location_t loc
, const char *carg
)
1764 arg
= xstrdup (carg
);
1765 equal
= strchr (arg
, '=');
1767 error_at (loc
, "%s: --param arguments should be of the form NAME=VALUE",
1771 value
= integral_argument (equal
+ 1);
1773 error_at (loc
, "invalid --param value %qs", equal
+ 1);
1777 set_param_value (arg
, value
,
1778 opts
->x_param_values
, opts_set
->x_param_values
);
1785 /* Used to set the level of strict aliasing warnings in OPTS,
1786 when no level is specified (i.e., when -Wstrict-aliasing, and not
1787 -Wstrict-aliasing=level was given).
1788 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
1789 and 0 otherwise. After calling this function, wstrict_aliasing will be
1790 set to the default value of -Wstrict_aliasing=level, currently 3. */
1792 set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
)
1794 gcc_assert (onoff
== 0 || onoff
== 1);
1796 opts
->x_warn_strict_aliasing
= 3;
1798 opts
->x_warn_strict_aliasing
= 0;
1801 /* The following routines are useful in setting all the flags that
1802 -ffast-math and -fno-fast-math imply. */
1804 set_fast_math_flags (struct gcc_options
*opts
, int set
)
1806 if (!opts
->frontend_set_flag_unsafe_math_optimizations
)
1808 opts
->x_flag_unsafe_math_optimizations
= set
;
1809 set_unsafe_math_optimizations_flags (opts
, set
);
1811 if (!opts
->frontend_set_flag_finite_math_only
)
1812 opts
->x_flag_finite_math_only
= set
;
1813 if (!opts
->frontend_set_flag_errno_math
)
1814 opts
->x_flag_errno_math
= !set
;
1817 if (!opts
->frontend_set_flag_signaling_nans
)
1818 opts
->x_flag_signaling_nans
= 0;
1819 if (!opts
->frontend_set_flag_rounding_math
)
1820 opts
->x_flag_rounding_math
= 0;
1821 if (!opts
->frontend_set_flag_cx_limited_range
)
1822 opts
->x_flag_cx_limited_range
= 1;
1826 /* When -funsafe-math-optimizations is set the following
1827 flags are set as well. */
1829 set_unsafe_math_optimizations_flags (struct gcc_options
*opts
, int set
)
1831 if (!opts
->frontend_set_flag_trapping_math
)
1832 opts
->x_flag_trapping_math
= !set
;
1833 if (!opts
->frontend_set_flag_signed_zeros
)
1834 opts
->x_flag_signed_zeros
= !set
;
1835 if (!opts
->frontend_set_flag_associative_math
)
1836 opts
->x_flag_associative_math
= set
;
1837 if (!opts
->frontend_set_flag_reciprocal_math
)
1838 opts
->x_flag_reciprocal_math
= set
;
1841 /* Return true iff flags in OPTS are set as if -ffast-math. */
1843 fast_math_flags_set_p (const struct gcc_options
*opts
)
1845 return (!opts
->x_flag_trapping_math
1846 && opts
->x_flag_unsafe_math_optimizations
1847 && opts
->x_flag_finite_math_only
1848 && !opts
->x_flag_signed_zeros
1849 && !opts
->x_flag_errno_math
);
1852 /* Return true iff flags are set as if -ffast-math but using the flags stored
1853 in the struct cl_optimization structure. */
1855 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
1857 return (!opt
->x_flag_trapping_math
1858 && opt
->x_flag_unsafe_math_optimizations
1859 && opt
->x_flag_finite_math_only
1860 && !opt
->x_flag_signed_zeros
1861 && !opt
->x_flag_errno_math
);
1864 /* Handle a debug output -g switch for options OPTS
1865 (OPTS_SET->x_write_symbols storing whether a debug type was passed
1866 explicitly), location LOC. EXTENDED is true or false to support
1867 extended output (2 is special and means "-ggdb" was given). */
1869 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
,
1870 struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1873 opts
->x_use_gnu_debug_info_extensions
= extended
;
1875 if (type
== NO_DEBUG
)
1877 if (opts
->x_write_symbols
== NO_DEBUG
)
1879 opts
->x_write_symbols
= PREFERRED_DEBUGGING_TYPE
;
1883 #ifdef DWARF2_DEBUGGING_INFO
1884 opts
->x_write_symbols
= DWARF2_DEBUG
;
1885 #elif defined DBX_DEBUGGING_INFO
1886 opts
->x_write_symbols
= DBX_DEBUG
;
1890 if (opts
->x_write_symbols
== NO_DEBUG
)
1891 warning_at (loc
, 0, "target system does not support debug output");
1896 /* Does it conflict with an already selected type? */
1897 if (opts_set
->x_write_symbols
!= NO_DEBUG
1898 && opts
->x_write_symbols
!= NO_DEBUG
1899 && type
!= opts
->x_write_symbols
)
1900 error_at (loc
, "debug format \"%s\" conflicts with prior selection",
1901 debug_type_names
[type
]);
1902 opts
->x_write_symbols
= type
;
1903 opts_set
->x_write_symbols
= type
;
1906 /* A debug flag without a level defaults to level 2. */
1909 if (!opts
->x_debug_info_level
)
1910 opts
->x_debug_info_level
= DINFO_LEVEL_NORMAL
;
1914 int argval
= integral_argument (arg
);
1916 error_at (loc
, "unrecognised debug output level \"%s\"", arg
);
1917 else if (argval
> 3)
1918 error_at (loc
, "debug output level %s is too high", arg
);
1920 opts
->x_debug_info_level
= (enum debug_info_levels
) argval
;
1924 /* Arrange to dump core on error for diagnostic context DC. (The
1925 regular error message is still printed first, except in the case of
1929 setup_core_dumping (diagnostic_context
*dc
)
1932 signal (SIGABRT
, SIG_DFL
);
1934 #if defined(HAVE_SETRLIMIT)
1937 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
1938 fatal_error ("getting core file size maximum limit: %m");
1939 rlim
.rlim_cur
= rlim
.rlim_max
;
1940 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
1941 fatal_error ("setting core file size limit to maximum: %m");
1944 diagnostic_abort_on_error (dc
);
1947 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
1948 diagnostic context DC. */
1951 decode_d_option (const char *arg
, struct gcc_options
*opts
,
1952 location_t loc
, diagnostic_context
*dc
)
1960 opts
->x_flag_debug_asm
= 1;
1963 opts
->x_flag_print_asm_name
= 1;
1966 opts
->x_flag_dump_rtl_in_asm
= 1;
1967 opts
->x_flag_print_asm_name
= 1;
1970 opts
->x_graph_dump_format
= vcg
;
1973 opts
->x_rtl_dump_and_exit
= 1;
1975 case 'D': /* These are handled by the preprocessor. */
1982 setup_core_dumping (dc
);
1985 opts
->x_flag_dump_all_passed
= true;
1989 warning_at (loc
, 0, "unrecognized gcc debugging option: %c", c
);
1994 /* Enable (or disable if VALUE is 0) a warning option ARG (language
1995 mask LANG_MASK, option handlers HANDLERS) as an error for option
1996 structures OPTS and OPTS_SET, diagnostic context DC (possibly
1997 NULL), location LOC. This is used by -Werror=. */
2000 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
,
2001 const struct cl_option_handlers
*handlers
,
2002 struct gcc_options
*opts
,
2003 struct gcc_options
*opts_set
,
2004 location_t loc
, diagnostic_context
*dc
)
2009 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2010 new_option
[0] = 'W';
2011 strcpy (new_option
+ 1, arg
);
2012 option_index
= find_opt (new_option
, lang_mask
);
2013 if (option_index
== OPT_SPECIAL_unknown
)
2015 error_at (loc
, "-Werror=%s: no option -%s", arg
, new_option
);
2019 const diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
2021 control_warning_option (option_index
, (int) kind
, value
,
2023 handlers
, opts
, opts_set
, dc
);
2024 if (option_index
== OPT_Wuninitialized
)
2025 enable_warning_as_error ("maybe-uninitialized", value
, lang_mask
,
2026 handlers
, opts
, opts_set
, loc
, dc
);
2031 /* Return malloced memory for the name of the option OPTION_INDEX
2032 which enabled a diagnostic (context CONTEXT), originally of type
2033 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
2037 option_name (diagnostic_context
*context
, int option_index
,
2038 diagnostic_t orig_diag_kind
, diagnostic_t diag_kind
)
2042 /* A warning classified as an error. */
2043 if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
)
2044 && diag_kind
== DK_ERROR
)
2045 return concat (cl_options
[OPT_Werror_
].opt_text
,
2046 /* Skip over "-W". */
2047 cl_options
[option_index
].opt_text
+ 2,
2049 /* A warning with option. */
2051 return xstrdup (cl_options
[option_index
].opt_text
);
2053 /* A warning without option classified as an error. */
2054 else if (orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
2055 || diag_kind
== DK_WARNING
)
2057 if (context
->warning_as_error_requested
)
2058 return xstrdup (cl_options
[OPT_Werror
].opt_text
);
2060 return xstrdup (_("enabled by default"));