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 /* -Wmissing-noreturn is alias for -Wsuggest-attribute=noreturn. */
670 if (opts
->x_warn_missing_noreturn
)
671 opts
->x_warn_suggest_attribute_noreturn
= true;
673 /* Unless the user has asked for section anchors, we disable toplevel
674 reordering at -O0 to disable transformations that might be surprising
675 to end users and to get -fno-toplevel-reorder tested. */
676 if (!opts
->x_optimize
677 && opts
->x_flag_toplevel_reorder
== 2
678 && !(opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
))
680 opts
->x_flag_toplevel_reorder
= 0;
681 opts
->x_flag_section_anchors
= 0;
683 if (!opts
->x_flag_toplevel_reorder
)
685 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
686 error_at (loc
, "section anchors must be disabled when toplevel reorder"
688 opts
->x_flag_section_anchors
= 0;
691 if (!opts
->x_flag_opts_finished
)
693 if (opts
->x_flag_pie
)
694 opts
->x_flag_pic
= opts
->x_flag_pie
;
695 if (opts
->x_flag_pic
&& !opts
->x_flag_pie
)
696 opts
->x_flag_shlib
= 1;
697 opts
->x_flag_opts_finished
= true;
700 if (opts
->x_optimize
== 0)
702 /* Inlining does not work if not optimizing,
703 so force it not to be done. */
704 opts
->x_warn_inline
= 0;
705 opts
->x_flag_no_inline
= 1;
708 /* The optimization to partition hot and cold basic blocks into separate
709 sections of the .o and executable files does not work (currently)
710 with exception handling. This is because there is no support for
711 generating unwind info. If opts->x_flag_exceptions is turned on
712 we need to turn off the partitioning optimization. */
714 ui_except
= targetm_common
.except_unwind_info (opts
);
716 if (opts
->x_flag_exceptions
717 && opts
->x_flag_reorder_blocks_and_partition
718 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))
721 "-freorder-blocks-and-partition does not work "
722 "with exceptions on this architecture");
723 opts
->x_flag_reorder_blocks_and_partition
= 0;
724 opts
->x_flag_reorder_blocks
= 1;
727 /* If user requested unwind info, then turn off the partitioning
730 if (opts
->x_flag_unwind_tables
731 && !targetm_common
.unwind_tables_default
732 && opts
->x_flag_reorder_blocks_and_partition
733 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))
736 "-freorder-blocks-and-partition does not support "
737 "unwind info on this architecture");
738 opts
->x_flag_reorder_blocks_and_partition
= 0;
739 opts
->x_flag_reorder_blocks
= 1;
742 /* If the target requested unwind info, then turn off the partitioning
743 optimization with a different message. Likewise, if the target does not
744 support named sections. */
746 if (opts
->x_flag_reorder_blocks_and_partition
747 && (!targetm_common
.have_named_sections
748 || (opts
->x_flag_unwind_tables
749 && targetm_common
.unwind_tables_default
750 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))))
753 "-freorder-blocks-and-partition does not work "
754 "on this architecture");
755 opts
->x_flag_reorder_blocks_and_partition
= 0;
756 opts
->x_flag_reorder_blocks
= 1;
759 if (opts
->x_flag_reorder_blocks_and_partition
760 && !opts_set
->x_flag_reorder_functions
)
761 opts
->x_flag_reorder_functions
= 1;
763 /* Pipelining of outer loops is only possible when general pipelining
764 capabilities are requested. */
765 if (!opts
->x_flag_sel_sched_pipelining
)
766 opts
->x_flag_sel_sched_pipelining_outer_loops
= 0;
768 if (opts
->x_flag_conserve_stack
)
770 maybe_set_param_value (PARAM_LARGE_STACK_FRAME
, 100,
771 opts
->x_param_values
, opts_set
->x_param_values
);
772 maybe_set_param_value (PARAM_STACK_FRAME_GROWTH
, 40,
773 opts
->x_param_values
, opts_set
->x_param_values
);
776 if (opts
->x_flag_lto
)
779 opts
->x_flag_generate_lto
= 1;
781 /* When generating IL, do not operate in whole-program mode.
782 Otherwise, symbols will be privatized too early, causing link
784 opts
->x_flag_whole_program
= 0;
786 error_at (loc
, "LTO support has not been enabled in this configuration");
788 if (!opts
->x_flag_fat_lto_objects
&& !HAVE_LTO_PLUGIN
)
789 error_at (loc
, "-fno-fat-lto-objects are supported only with linker plugin.");
791 if ((opts
->x_flag_lto_partition_balanced
!= 0) + (opts
->x_flag_lto_partition_1to1
!= 0)
792 + (opts
->x_flag_lto_partition_none
!= 0) >= 1)
794 if ((opts
->x_flag_lto_partition_balanced
!= 0)
795 + (opts
->x_flag_lto_partition_1to1
!= 0)
796 + (opts
->x_flag_lto_partition_none
!= 0) > 1)
797 error_at (loc
, "only one -flto-partition value can be specified");
800 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
801 default value if they choose based on other options. */
802 if (opts
->x_flag_split_stack
== -1)
803 opts
->x_flag_split_stack
= 0;
804 else if (opts
->x_flag_split_stack
)
806 if (!targetm_common
.supports_split_stack (true, opts
))
808 error_at (loc
, "%<-fsplit-stack%> is not supported by "
809 "this compiler configuration");
810 opts
->x_flag_split_stack
= 0;
814 /* Set PARAM_MAX_STORES_TO_SINK to 0 if either vectorization or if-conversion
816 if (!opts
->x_flag_tree_vectorize
|| !opts
->x_flag_tree_loop_if_convert
)
817 maybe_set_param_value (PARAM_MAX_STORES_TO_SINK
, 0,
818 opts
->x_param_values
, opts_set
->x_param_values
);
820 /* This replaces set_Wunused. */
821 if (opts
->x_warn_unused_function
== -1)
822 opts
->x_warn_unused_function
= opts
->x_warn_unused
;
823 if (opts
->x_warn_unused_label
== -1)
824 opts
->x_warn_unused_label
= opts
->x_warn_unused
;
825 /* Wunused-parameter is enabled if both -Wunused -Wextra are enabled. */
826 if (opts
->x_warn_unused_parameter
== -1)
827 opts
->x_warn_unused_parameter
= (opts
->x_warn_unused
828 && opts
->x_extra_warnings
);
829 if (opts
->x_warn_unused_variable
== -1)
830 opts
->x_warn_unused_variable
= opts
->x_warn_unused
;
831 /* Wunused-but-set-parameter is enabled if both -Wunused -Wextra are
833 if (opts
->x_warn_unused_but_set_parameter
== -1)
834 opts
->x_warn_unused_but_set_parameter
= (opts
->x_warn_unused
835 && opts
->x_extra_warnings
);
836 if (opts
->x_warn_unused_but_set_variable
== -1)
837 opts
->x_warn_unused_but_set_variable
= opts
->x_warn_unused
;
838 if (opts
->x_warn_unused_value
== -1)
839 opts
->x_warn_unused_value
= opts
->x_warn_unused
;
841 /* This replaces set_Wextra. */
842 if (opts
->x_warn_uninitialized
== -1)
843 opts
->x_warn_uninitialized
= opts
->x_extra_warnings
;
846 #define LEFT_COLUMN 27
848 /* Output ITEM, of length ITEM_WIDTH, in the left column,
849 followed by word-wrapped HELP in a second column. */
851 wrap_help (const char *help
,
853 unsigned int item_width
,
854 unsigned int columns
)
856 unsigned int col_width
= LEFT_COLUMN
;
857 unsigned int remaining
, room
, len
;
859 remaining
= strlen (help
);
863 room
= columns
- 3 - MAX (col_width
, item_width
);
872 for (i
= 0; help
[i
]; i
++)
874 if (i
>= room
&& len
!= remaining
)
878 else if ((help
[i
] == '-' || help
[i
] == '/')
879 && help
[i
+ 1] != ' '
880 && i
> 0 && ISALPHA (help
[i
- 1]))
885 printf( " %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
887 while (help
[len
] == ' ')
895 /* Print help for a specific front-end, etc. */
897 print_filtered_help (unsigned int include_flags
,
898 unsigned int exclude_flags
,
899 unsigned int any_flags
,
900 unsigned int columns
,
901 struct gcc_options
*opts
,
902 unsigned int lang_mask
)
907 bool displayed
= false;
909 if (include_flags
== CL_PARAMS
)
911 for (i
= 0; i
< LAST_PARAM
; i
++)
913 const char *param
= compiler_params
[i
].option
;
915 help
= compiler_params
[i
].help
;
916 if (help
== NULL
|| *help
== '\0')
918 if (exclude_flags
& CL_UNDOCUMENTED
)
920 help
= undocumented_msg
;
923 /* Get the translation. */
926 wrap_help (help
, param
, strlen (param
), columns
);
932 if (!opts
->x_help_printed
)
933 opts
->x_help_printed
= XCNEWVAR (char, cl_options_count
);
935 if (!opts
->x_help_enum_printed
)
936 opts
->x_help_enum_printed
= XCNEWVAR (char, cl_enums_count
);
938 for (i
= 0; i
< cl_options_count
; i
++)
941 const struct cl_option
*option
= cl_options
+ i
;
946 if (include_flags
== 0
947 || ((option
->flags
& include_flags
) != include_flags
))
949 if ((option
->flags
& any_flags
) == 0)
953 /* Skip unwanted switches. */
954 if ((option
->flags
& exclude_flags
) != 0)
957 /* The driver currently prints its own help text. */
958 if ((option
->flags
& CL_DRIVER
) != 0
959 && (option
->flags
& (((1U << cl_lang_count
) - 1)
960 | CL_COMMON
| CL_TARGET
)) == 0)
964 /* Skip switches that have already been printed. */
965 if (opts
->x_help_printed
[i
])
968 opts
->x_help_printed
[i
] = true;
973 if (exclude_flags
& CL_UNDOCUMENTED
)
975 help
= undocumented_msg
;
978 /* Get the translation. */
981 /* Find the gap between the name of the
982 option and its descriptive text. */
983 tab
= strchr (help
, '\t');
992 opt
= option
->opt_text
;
996 /* With the -Q option enabled we change the descriptive text associated
997 with an option to be an indication of its current setting. */
998 if (!opts
->x_quiet_flag
)
1000 void *flag_var
= option_flag_var (i
, opts
);
1002 if (len
< (LEFT_COLUMN
+ 2))
1003 strcpy (new_help
, "\t\t");
1005 strcpy (new_help
, "\t");
1007 if (flag_var
!= NULL
1008 && option
->var_type
!= CLVC_DEFER
)
1010 if (option
->flags
& CL_JOINED
)
1012 if (option
->var_type
== CLVC_STRING
)
1014 if (* (const char **) flag_var
!= NULL
)
1015 snprintf (new_help
+ strlen (new_help
),
1016 sizeof (new_help
) - strlen (new_help
),
1017 * (const char **) flag_var
);
1019 else if (option
->var_type
== CLVC_ENUM
)
1021 const struct cl_enum
*e
= &cl_enums
[option
->var_enum
];
1023 const char *arg
= NULL
;
1025 value
= e
->get (flag_var
);
1026 enum_value_to_arg (e
->values
, &arg
, value
, lang_mask
);
1028 arg
= _("[default]");
1029 snprintf (new_help
+ strlen (new_help
),
1030 sizeof (new_help
) - strlen (new_help
),
1034 sprintf (new_help
+ strlen (new_help
),
1035 "%#x", * (int *) flag_var
);
1038 strcat (new_help
, option_enabled (i
, opts
)
1039 ? _("[enabled]") : _("[disabled]"));
1045 wrap_help (help
, opt
, len
, columns
);
1048 if (option
->var_type
== CLVC_ENUM
1049 && opts
->x_help_enum_printed
[option
->var_enum
] != 2)
1050 opts
->x_help_enum_printed
[option
->var_enum
] = 1;
1055 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1058 printf (_(" No options with the desired characteristics were found\n"));
1063 /* PR 31349: Tell the user how to see all of the
1064 options supported by a specific front end. */
1065 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1066 if ((1U << i
) & langs
)
1067 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1068 lang_names
[i
], lang_names
[i
]);
1072 else if (! displayed
)
1073 printf (_(" All options with the desired characteristics have already been displayed\n"));
1077 /* Print details of enumerated option arguments, if those
1078 enumerations have help text headings provided. If no help text
1079 is provided, presume that the possible values are listed in the
1080 help text for the relevant options. */
1081 for (i
= 0; i
< cl_enums_count
; i
++)
1083 unsigned int j
, pos
;
1085 if (opts
->x_help_enum_printed
[i
] != 1)
1087 if (cl_enums
[i
].help
== NULL
)
1089 printf (" %s\n ", _(cl_enums
[i
].help
));
1091 for (j
= 0; cl_enums
[i
].values
[j
].arg
!= NULL
; j
++)
1093 unsigned int len
= strlen (cl_enums
[i
].values
[j
].arg
);
1095 if (pos
> 4 && pos
+ 1 + len
<= columns
)
1097 printf (" %s", cl_enums
[i
].values
[j
].arg
);
1107 printf ("%s", cl_enums
[i
].values
[j
].arg
);
1112 opts
->x_help_enum_printed
[i
] = 2;
1116 /* Display help for a specified type of option.
1117 The options must have ALL of the INCLUDE_FLAGS set
1118 ANY of the flags in the ANY_FLAGS set
1119 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1120 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1122 print_specific_help (unsigned int include_flags
,
1123 unsigned int exclude_flags
,
1124 unsigned int any_flags
,
1125 struct gcc_options
*opts
,
1126 unsigned int lang_mask
)
1128 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1129 const char * description
= NULL
;
1130 const char * descrip_extra
= "";
1134 /* Sanity check: Make sure that we do not have more
1135 languages than we have bits available to enumerate them. */
1136 gcc_assert ((1U << cl_lang_count
) <= CL_MIN_OPTION_CLASS
);
1138 /* If we have not done so already, obtain
1139 the desired maximum width of the output. */
1140 if (opts
->x_help_columns
== 0)
1144 p
= getenv ("COLUMNS");
1147 int value
= atoi (p
);
1150 opts
->x_help_columns
= value
;
1153 if (opts
->x_help_columns
== 0)
1154 /* Use a reasonable default. */
1155 opts
->x_help_columns
= 80;
1158 /* Decide upon the title for the options that we are going to display. */
1159 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1161 switch (flag
& include_flags
)
1168 description
= _("The following options are target specific");
1171 description
= _("The following options control compiler warning messages");
1173 case CL_OPTIMIZATION
:
1174 description
= _("The following options control optimizations");
1177 description
= _("The following options are language-independent");
1180 description
= _("The --param option recognizes the following as parameters");
1183 if (i
>= cl_lang_count
)
1185 if (exclude_flags
& all_langs_mask
)
1186 description
= _("The following options are specific to just the language ");
1188 description
= _("The following options are supported by the language ");
1189 descrip_extra
= lang_names
[i
];
1194 if (description
== NULL
)
1198 if (include_flags
& CL_UNDOCUMENTED
)
1199 description
= _("The following options are not documented");
1200 else if (include_flags
& CL_SEPARATE
)
1201 description
= _("The following options take separate arguments");
1202 else if (include_flags
& CL_JOINED
)
1203 description
= _("The following options take joined arguments");
1206 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1213 if (any_flags
& all_langs_mask
)
1214 description
= _("The following options are language-related");
1216 description
= _("The following options are language-independent");
1220 printf ("%s%s:\n", description
, descrip_extra
);
1221 print_filtered_help (include_flags
, exclude_flags
, any_flags
,
1222 opts
->x_help_columns
, opts
, lang_mask
);
1225 /* Handle target- and language-independent options. Return zero to
1226 generate an "unknown option" message. Only options that need
1227 extra handling need to be listed here; if you simply want
1228 DECODED->value assigned to a variable, it happens automatically. */
1231 common_handle_option (struct gcc_options
*opts
,
1232 struct gcc_options
*opts_set
,
1233 const struct cl_decoded_option
*decoded
,
1234 unsigned int lang_mask
, int kind ATTRIBUTE_UNUSED
,
1236 const struct cl_option_handlers
*handlers
,
1237 diagnostic_context
*dc
)
1239 size_t scode
= decoded
->opt_index
;
1240 const char *arg
= decoded
->arg
;
1241 int value
= decoded
->value
;
1242 enum opt_code code
= (enum opt_code
) scode
;
1244 gcc_assert (decoded
->canonical_option_num_elements
<= 2);
1249 handle_param (opts
, opts_set
, loc
, arg
);
1254 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1255 unsigned int undoc_mask
;
1258 if (lang_mask
== CL_DRIVER
)
1261 undoc_mask
= ((opts
->x_verbose_flag
| opts
->x_extra_warnings
)
1264 /* First display any single language specific options. */
1265 for (i
= 0; i
< cl_lang_count
; i
++)
1267 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0, opts
,
1269 /* Next display any multi language specific options. */
1270 print_specific_help (0, undoc_mask
, all_langs_mask
, opts
, lang_mask
);
1271 /* Then display any remaining, non-language options. */
1272 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1274 print_specific_help (i
, undoc_mask
, 0, opts
, lang_mask
);
1275 opts
->x_exit_after_options
= true;
1279 case OPT__target_help
:
1280 if (lang_mask
== CL_DRIVER
)
1283 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0, opts
, lang_mask
);
1284 opts
->x_exit_after_options
= true;
1289 const char * a
= arg
;
1290 unsigned int include_flags
= 0;
1291 /* Note - by default we include undocumented options when listing
1292 specific classes. If you only want to see documented options
1293 then add ",^undocumented" to the --help= option. E.g.:
1295 --help=target,^undocumented */
1296 unsigned int exclude_flags
= 0;
1298 if (lang_mask
== CL_DRIVER
)
1301 /* Walk along the argument string, parsing each word in turn.
1303 arg = [^]{word}[,{arg}]
1304 word = {optimizers|target|warnings|undocumented|
1305 params|common|<language>} */
1310 const char * string
;
1315 { "optimizers", CL_OPTIMIZATION
},
1316 { "target", CL_TARGET
},
1317 { "warnings", CL_WARNING
},
1318 { "undocumented", CL_UNDOCUMENTED
},
1319 { "params", CL_PARAMS
},
1320 { "joined", CL_JOINED
},
1321 { "separate", CL_SEPARATE
},
1322 { "common", CL_COMMON
},
1325 unsigned int * pflags
;
1327 unsigned int lang_flag
, specific_flag
;
1334 pflags
= & exclude_flags
;
1337 pflags
= & include_flags
;
1339 comma
= strchr (a
, ',');
1350 /* Check to see if the string matches an option class name. */
1351 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1352 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1354 specific_flag
= specifics
[i
].flag
;
1358 /* Check to see if the string matches a language name.
1359 Note - we rely upon the alpha-sorted nature of the entries in
1360 the lang_names array, specifically that shorter names appear
1361 before their longer variants. (i.e. C before C++). That way
1362 when we are attempting to match --help=c for example we will
1363 match with C first and not C++. */
1364 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1365 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1367 lang_flag
= 1U << i
;
1371 if (specific_flag
!= 0)
1374 * pflags
|= specific_flag
;
1377 /* The option's argument matches both the start of a
1378 language name and the start of an option class name.
1379 We have a special case for when the user has
1380 specified "--help=c", but otherwise we have to issue
1382 if (strncasecmp (a
, "c", len
) == 0)
1383 * pflags
|= lang_flag
;
1386 "--help argument %q.*s is ambiguous, "
1387 "please be more specific",
1391 else if (lang_flag
!= 0)
1392 * pflags
|= lang_flag
;
1395 "unrecognized argument to --help= option: %q.*s",
1404 print_specific_help (include_flags
, exclude_flags
, 0, opts
,
1406 opts
->x_exit_after_options
= true;
1411 if (lang_mask
== CL_DRIVER
)
1414 opts
->x_exit_after_options
= true;
1420 /* Currently handled in a prescan. */
1424 dc
->warning_as_error_requested
= value
;
1428 if (lang_mask
== CL_DRIVER
)
1431 enable_warning_as_error (arg
, value
, lang_mask
, handlers
,
1432 opts
, opts_set
, loc
, dc
);
1435 case OPT_Wlarger_than_
:
1436 opts
->x_larger_than_size
= value
;
1437 opts
->x_warn_larger_than
= value
!= -1;
1440 case OPT_Wfatal_errors
:
1441 dc
->fatal_errors
= value
;
1444 case OPT_Wframe_larger_than_
:
1445 opts
->x_frame_larger_than_size
= value
;
1446 opts
->x_warn_frame_larger_than
= value
!= -1;
1449 case OPT_Wstack_usage_
:
1450 opts
->x_warn_stack_usage
= value
;
1451 opts
->x_flag_stack_usage_info
= value
!= -1;
1454 case OPT_Wstrict_aliasing
:
1455 set_Wstrict_aliasing (opts
, value
);
1458 case OPT_Wstrict_overflow
:
1459 opts
->x_warn_strict_overflow
= (value
1460 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1464 case OPT_Wsystem_headers
:
1465 dc
->dc_warn_system_headers
= value
;
1469 opts
->x_flag_gen_aux_info
= 1;
1472 case OPT_auxbase_strip
:
1474 char *tmp
= xstrdup (arg
);
1475 strip_off_ending (tmp
, strlen (tmp
));
1477 opts
->x_aux_base_name
= tmp
;
1482 decode_d_option (arg
, opts
, loc
, dc
);
1485 case OPT_fcall_used_
:
1486 case OPT_fcall_saved_
:
1491 case OPT_fdbg_cnt_list
:
1495 case OPT_fdebug_prefix_map_
:
1499 case OPT_fdiagnostics_show_location_
:
1500 diagnostic_prefixing_rule (dc
) = (diagnostic_prefixing_rule_t
) value
;
1503 case OPT_fdiagnostics_show_caret
:
1504 dc
->show_caret
= value
;
1507 case OPT_fdiagnostics_show_option
:
1508 dc
->show_option_requested
= value
;
1515 case OPT_ffast_math
:
1516 set_fast_math_flags (opts
, value
);
1519 case OPT_funsafe_math_optimizations
:
1520 set_unsafe_math_optimizations_flags (opts
, value
);
1527 case OPT_finline_limit_
:
1528 set_param_value ("max-inline-insns-single", value
/ 2,
1529 opts
->x_param_values
, opts_set
->x_param_values
);
1530 set_param_value ("max-inline-insns-auto", value
/ 2,
1531 opts
->x_param_values
, opts_set
->x_param_values
);
1534 case OPT_finstrument_functions_exclude_function_list_
:
1535 add_comma_separated_to_vector
1536 (&opts
->x_flag_instrument_functions_exclude_functions
, arg
);
1539 case OPT_finstrument_functions_exclude_file_list_
:
1540 add_comma_separated_to_vector
1541 (&opts
->x_flag_instrument_functions_exclude_files
, arg
);
1544 case OPT_fmessage_length_
:
1545 pp_set_line_maximum_length (dc
->printer
, value
);
1546 diagnostic_set_caret_max_width (dc
, value
);
1549 case OPT_fpack_struct_
:
1550 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1552 "structure alignment must be a small power of two, not %d",
1555 opts
->x_initial_max_fld_align
= value
;
1559 case OPT_fplugin_arg_
:
1563 case OPT_fprofile_use_
:
1564 opts
->x_profile_data_prefix
= xstrdup (arg
);
1565 opts
->x_flag_profile_use
= true;
1567 /* No break here - do -fprofile-use processing. */
1568 case OPT_fprofile_use
:
1569 if (!opts_set
->x_flag_branch_probabilities
)
1570 opts
->x_flag_branch_probabilities
= value
;
1571 if (!opts_set
->x_flag_profile_values
)
1572 opts
->x_flag_profile_values
= value
;
1573 if (!opts_set
->x_flag_unroll_loops
)
1574 opts
->x_flag_unroll_loops
= value
;
1575 if (!opts_set
->x_flag_peel_loops
)
1576 opts
->x_flag_peel_loops
= value
;
1577 if (!opts_set
->x_flag_tracer
)
1578 opts
->x_flag_tracer
= value
;
1579 if (!opts_set
->x_flag_value_profile_transformations
)
1580 opts
->x_flag_value_profile_transformations
= value
;
1581 if (!opts_set
->x_flag_inline_functions
)
1582 opts
->x_flag_inline_functions
= value
;
1583 if (!opts_set
->x_flag_ipa_cp
)
1584 opts
->x_flag_ipa_cp
= value
;
1585 if (!opts_set
->x_flag_ipa_cp_clone
1586 && value
&& opts
->x_flag_ipa_cp
)
1587 opts
->x_flag_ipa_cp_clone
= value
;
1588 if (!opts_set
->x_flag_predictive_commoning
)
1589 opts
->x_flag_predictive_commoning
= value
;
1590 if (!opts_set
->x_flag_unswitch_loops
)
1591 opts
->x_flag_unswitch_loops
= value
;
1592 if (!opts_set
->x_flag_gcse_after_reload
)
1593 opts
->x_flag_gcse_after_reload
= value
;
1596 case OPT_fprofile_generate_
:
1597 opts
->x_profile_data_prefix
= xstrdup (arg
);
1599 /* No break here - do -fprofile-generate processing. */
1600 case OPT_fprofile_generate
:
1601 if (!opts_set
->x_profile_arc_flag
)
1602 opts
->x_profile_arc_flag
= value
;
1603 if (!opts_set
->x_flag_profile_values
)
1604 opts
->x_flag_profile_values
= value
;
1605 if (!opts_set
->x_flag_value_profile_transformations
)
1606 opts
->x_flag_value_profile_transformations
= value
;
1607 if (!opts_set
->x_flag_inline_functions
)
1608 opts
->x_flag_inline_functions
= value
;
1609 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
1610 quadratic. Disable the pass until better memory representation
1612 if (!opts_set
->x_flag_ipa_reference
&& opts
->x_in_lto_p
)
1613 opts
->x_flag_ipa_reference
= false;
1616 case OPT_fshow_column
:
1617 dc
->show_column
= value
;
1620 case OPT_frandom_seed
:
1621 /* The real switch is -fno-random-seed. */
1627 case OPT_frandom_seed_
:
1631 case OPT_fsched_verbose_
:
1632 #ifdef INSN_SCHEDULING
1633 /* Handled with Var in common.opt. */
1639 case OPT_fsched_stalled_insns_
:
1640 opts
->x_flag_sched_stalled_insns
= value
;
1641 if (opts
->x_flag_sched_stalled_insns
== 0)
1642 opts
->x_flag_sched_stalled_insns
= -1;
1645 case OPT_fsched_stalled_insns_dep_
:
1646 opts
->x_flag_sched_stalled_insns_dep
= value
;
1649 case OPT_fstack_check_
:
1650 if (!strcmp (arg
, "no"))
1651 opts
->x_flag_stack_check
= NO_STACK_CHECK
;
1652 else if (!strcmp (arg
, "generic"))
1653 /* This is the old stack checking method. */
1654 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1655 ? FULL_BUILTIN_STACK_CHECK
1656 : GENERIC_STACK_CHECK
;
1657 else if (!strcmp (arg
, "specific"))
1658 /* This is the new stack checking method. */
1659 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1660 ? FULL_BUILTIN_STACK_CHECK
1661 : STACK_CHECK_STATIC_BUILTIN
1662 ? STATIC_BUILTIN_STACK_CHECK
1663 : GENERIC_STACK_CHECK
;
1665 warning_at (loc
, 0, "unknown stack check parameter \"%s\"", arg
);
1668 case OPT_fstack_limit
:
1669 /* The real switch is -fno-stack-limit. */
1675 case OPT_fstack_limit_register_
:
1676 case OPT_fstack_limit_symbol_
:
1680 case OPT_fstack_usage
:
1681 opts
->x_flag_stack_usage
= value
;
1682 opts
->x_flag_stack_usage_info
= value
!= 0;
1685 case OPT_ftree_vectorizer_verbose_
:
1686 vect_set_verbosity_level (opts
, value
);
1690 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
, opts
, opts_set
,
1695 set_debug_level (SDB_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1699 if (value
< 2 || value
> 4)
1700 error_at (loc
, "dwarf version %d is not supported", value
);
1702 opts
->x_dwarf_version
= value
;
1703 set_debug_level (DWARF2_DEBUG
, false, "", opts
, opts_set
, loc
);
1707 set_debug_level (NO_DEBUG
, 2, arg
, opts
, opts_set
, loc
);
1712 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
, opts
, opts_set
,
1717 set_debug_level (VMS_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1722 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
, opts
, opts_set
,
1726 case OPT_pedantic_errors
:
1727 opts
->x_pedantic
= 1;
1728 dc
->pedantic_errors
= 1;
1732 opts
->x_flag_lto
= value
? "" : NULL
;
1736 dc
->dc_inhibit_warnings
= true;
1739 case OPT_fmax_errors_
:
1740 dc
->max_errors
= value
;
1743 case OPT_fuse_linker_plugin
:
1744 /* No-op. Used by the driver and passed to us because it starts with f.*/
1747 case OPT_Wuninitialized
:
1748 /* Also turn on maybe uninitialized warning. */
1749 opts
->x_warn_maybe_uninitialized
= value
;
1753 /* If the flag was handled in a standard way, assume the lack of
1754 processing here is intentional. */
1755 gcc_assert (option_flag_var (scode
, opts
));
1762 /* Handle --param NAME=VALUE. */
1764 handle_param (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1765 location_t loc
, const char *carg
)
1770 arg
= xstrdup (carg
);
1771 equal
= strchr (arg
, '=');
1773 error_at (loc
, "%s: --param arguments should be of the form NAME=VALUE",
1777 value
= integral_argument (equal
+ 1);
1779 error_at (loc
, "invalid --param value %qs", equal
+ 1);
1783 set_param_value (arg
, value
,
1784 opts
->x_param_values
, opts_set
->x_param_values
);
1791 /* Used to set the level of strict aliasing warnings in OPTS,
1792 when no level is specified (i.e., when -Wstrict-aliasing, and not
1793 -Wstrict-aliasing=level was given).
1794 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
1795 and 0 otherwise. After calling this function, wstrict_aliasing will be
1796 set to the default value of -Wstrict_aliasing=level, currently 3. */
1798 set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
)
1800 gcc_assert (onoff
== 0 || onoff
== 1);
1802 opts
->x_warn_strict_aliasing
= 3;
1804 opts
->x_warn_strict_aliasing
= 0;
1807 /* The following routines are useful in setting all the flags that
1808 -ffast-math and -fno-fast-math imply. */
1810 set_fast_math_flags (struct gcc_options
*opts
, int set
)
1812 if (!opts
->frontend_set_flag_unsafe_math_optimizations
)
1814 opts
->x_flag_unsafe_math_optimizations
= set
;
1815 set_unsafe_math_optimizations_flags (opts
, set
);
1817 if (!opts
->frontend_set_flag_finite_math_only
)
1818 opts
->x_flag_finite_math_only
= set
;
1819 if (!opts
->frontend_set_flag_errno_math
)
1820 opts
->x_flag_errno_math
= !set
;
1823 if (!opts
->frontend_set_flag_signaling_nans
)
1824 opts
->x_flag_signaling_nans
= 0;
1825 if (!opts
->frontend_set_flag_rounding_math
)
1826 opts
->x_flag_rounding_math
= 0;
1827 if (!opts
->frontend_set_flag_cx_limited_range
)
1828 opts
->x_flag_cx_limited_range
= 1;
1832 /* When -funsafe-math-optimizations is set the following
1833 flags are set as well. */
1835 set_unsafe_math_optimizations_flags (struct gcc_options
*opts
, int set
)
1837 if (!opts
->frontend_set_flag_trapping_math
)
1838 opts
->x_flag_trapping_math
= !set
;
1839 if (!opts
->frontend_set_flag_signed_zeros
)
1840 opts
->x_flag_signed_zeros
= !set
;
1841 if (!opts
->frontend_set_flag_associative_math
)
1842 opts
->x_flag_associative_math
= set
;
1843 if (!opts
->frontend_set_flag_reciprocal_math
)
1844 opts
->x_flag_reciprocal_math
= set
;
1847 /* Return true iff flags in OPTS are set as if -ffast-math. */
1849 fast_math_flags_set_p (const struct gcc_options
*opts
)
1851 return (!opts
->x_flag_trapping_math
1852 && opts
->x_flag_unsafe_math_optimizations
1853 && opts
->x_flag_finite_math_only
1854 && !opts
->x_flag_signed_zeros
1855 && !opts
->x_flag_errno_math
);
1858 /* Return true iff flags are set as if -ffast-math but using the flags stored
1859 in the struct cl_optimization structure. */
1861 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
1863 return (!opt
->x_flag_trapping_math
1864 && opt
->x_flag_unsafe_math_optimizations
1865 && opt
->x_flag_finite_math_only
1866 && !opt
->x_flag_signed_zeros
1867 && !opt
->x_flag_errno_math
);
1870 /* Handle a debug output -g switch for options OPTS
1871 (OPTS_SET->x_write_symbols storing whether a debug type was passed
1872 explicitly), location LOC. EXTENDED is true or false to support
1873 extended output (2 is special and means "-ggdb" was given). */
1875 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
,
1876 struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1879 opts
->x_use_gnu_debug_info_extensions
= extended
;
1881 if (type
== NO_DEBUG
)
1883 if (opts
->x_write_symbols
== NO_DEBUG
)
1885 opts
->x_write_symbols
= PREFERRED_DEBUGGING_TYPE
;
1889 #ifdef DWARF2_DEBUGGING_INFO
1890 opts
->x_write_symbols
= DWARF2_DEBUG
;
1891 #elif defined DBX_DEBUGGING_INFO
1892 opts
->x_write_symbols
= DBX_DEBUG
;
1896 if (opts
->x_write_symbols
== NO_DEBUG
)
1897 warning_at (loc
, 0, "target system does not support debug output");
1902 /* Does it conflict with an already selected type? */
1903 if (opts_set
->x_write_symbols
!= NO_DEBUG
1904 && opts
->x_write_symbols
!= NO_DEBUG
1905 && type
!= opts
->x_write_symbols
)
1906 error_at (loc
, "debug format \"%s\" conflicts with prior selection",
1907 debug_type_names
[type
]);
1908 opts
->x_write_symbols
= type
;
1909 opts_set
->x_write_symbols
= type
;
1912 /* A debug flag without a level defaults to level 2. */
1915 if (!opts
->x_debug_info_level
)
1916 opts
->x_debug_info_level
= DINFO_LEVEL_NORMAL
;
1920 int argval
= integral_argument (arg
);
1922 error_at (loc
, "unrecognised debug output level \"%s\"", arg
);
1923 else if (argval
> 3)
1924 error_at (loc
, "debug output level %s is too high", arg
);
1926 opts
->x_debug_info_level
= (enum debug_info_levels
) argval
;
1930 /* Arrange to dump core on error for diagnostic context DC. (The
1931 regular error message is still printed first, except in the case of
1935 setup_core_dumping (diagnostic_context
*dc
)
1938 signal (SIGABRT
, SIG_DFL
);
1940 #if defined(HAVE_SETRLIMIT)
1943 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
1944 fatal_error ("getting core file size maximum limit: %m");
1945 rlim
.rlim_cur
= rlim
.rlim_max
;
1946 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
1947 fatal_error ("setting core file size limit to maximum: %m");
1950 diagnostic_abort_on_error (dc
);
1953 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
1954 diagnostic context DC. */
1957 decode_d_option (const char *arg
, struct gcc_options
*opts
,
1958 location_t loc
, diagnostic_context
*dc
)
1966 opts
->x_flag_debug_asm
= 1;
1969 opts
->x_flag_print_asm_name
= 1;
1972 opts
->x_flag_dump_rtl_in_asm
= 1;
1973 opts
->x_flag_print_asm_name
= 1;
1976 opts
->x_graph_dump_format
= vcg
;
1979 opts
->x_rtl_dump_and_exit
= 1;
1981 case 'D': /* These are handled by the preprocessor. */
1988 setup_core_dumping (dc
);
1991 opts
->x_flag_dump_all_passed
= true;
1995 warning_at (loc
, 0, "unrecognized gcc debugging option: %c", c
);
2000 /* Enable (or disable if VALUE is 0) a warning option ARG (language
2001 mask LANG_MASK, option handlers HANDLERS) as an error for option
2002 structures OPTS and OPTS_SET, diagnostic context DC (possibly
2003 NULL), location LOC. This is used by -Werror=. */
2006 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
,
2007 const struct cl_option_handlers
*handlers
,
2008 struct gcc_options
*opts
,
2009 struct gcc_options
*opts_set
,
2010 location_t loc
, diagnostic_context
*dc
)
2015 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2016 new_option
[0] = 'W';
2017 strcpy (new_option
+ 1, arg
);
2018 option_index
= find_opt (new_option
, lang_mask
);
2019 if (option_index
== OPT_SPECIAL_unknown
)
2021 error_at (loc
, "-Werror=%s: no option -%s", arg
, new_option
);
2025 const diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
2027 control_warning_option (option_index
, (int) kind
, value
,
2029 handlers
, opts
, opts_set
, dc
);
2030 if (option_index
== OPT_Wuninitialized
)
2031 enable_warning_as_error ("maybe-uninitialized", value
, lang_mask
,
2032 handlers
, opts
, opts_set
, loc
, dc
);
2037 /* Return malloced memory for the name of the option OPTION_INDEX
2038 which enabled a diagnostic (context CONTEXT), originally of type
2039 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
2043 option_name (diagnostic_context
*context
, int option_index
,
2044 diagnostic_t orig_diag_kind
, diagnostic_t diag_kind
)
2048 /* A warning classified as an error. */
2049 if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
)
2050 && diag_kind
== DK_ERROR
)
2051 return concat (cl_options
[OPT_Werror_
].opt_text
,
2052 /* Skip over "-W". */
2053 cl_options
[option_index
].opt_text
+ 2,
2055 /* A warning with option. */
2057 return xstrdup (cl_options
[option_index
].opt_text
);
2059 /* A warning without option classified as an error. */
2060 else if (orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
2061 || diag_kind
== DK_WARNING
)
2063 if (context
->warning_as_error_requested
)
2064 return xstrdup (cl_options
[OPT_Werror
].opt_text
);
2066 return xstrdup (_("enabled by default"));