1 /* Parse and display command line options.
2 Copyright (C) 2000-2016 Free Software Foundation, Inc.
3 Contributed by Andy Vaught
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
23 #include "coretypes.h"
27 #include "diagnostic.h" /* For global_dc. */
29 #include "toplev.h" /* For save_decoded_options. */
31 #include "langhooks.h"
33 gfc_option_t gfc_option
;
36 /* Set flags that control warnings and errors for different
37 Fortran standards to their default values. Keep in sync with
38 libgfortran/runtime/compile_options.c (init_compile_options). */
41 set_default_std_flags (void)
43 gfc_option
.allow_std
= GFC_STD_F95_OBS
| GFC_STD_F95_DEL
44 | GFC_STD_F2003
| GFC_STD_F2008
| GFC_STD_F95
| GFC_STD_F77
45 | GFC_STD_F2008_OBS
| GFC_STD_F2008_TS
| GFC_STD_GNU
| GFC_STD_LEGACY
;
46 gfc_option
.warn_std
= GFC_STD_F95_DEL
| GFC_STD_LEGACY
;
50 /* Set all the DEC extension flags. */
53 set_dec_flags (int value
)
55 gfc_option
.flag_dec_structure
= value
;
59 /* Return language mask for Fortran options. */
62 gfc_option_lang_mask (void)
67 /* Initialize options structure OPTS. */
70 gfc_init_options_struct (struct gcc_options
*opts
)
72 opts
->x_flag_errno_math
= 0;
73 opts
->frontend_set_flag_errno_math
= true;
74 opts
->x_flag_associative_math
= -1;
75 opts
->frontend_set_flag_associative_math
= true;
78 /* Get ready for options handling. Keep in sync with
79 libgfortran/runtime/compile_options.c (init_compile_options). */
82 gfc_init_options (unsigned int decoded_options_count
,
83 struct cl_decoded_option
*decoded_options
)
85 gfc_source_file
= NULL
;
86 gfc_option
.module_dir
= NULL
;
87 gfc_option
.source_form
= FORM_UNKNOWN
;
88 gfc_option
.max_continue_fixed
= 255;
89 gfc_option
.max_continue_free
= 255;
90 gfc_option
.max_identifier_length
= GFC_MAX_SYMBOL_LEN
;
91 gfc_option
.max_errors
= 25;
93 gfc_option
.flag_preprocessed
= 0;
94 gfc_option
.flag_d_lines
= -1;
95 gfc_option
.flag_init_integer
= GFC_INIT_INTEGER_OFF
;
96 gfc_option
.flag_init_integer_value
= 0;
97 gfc_option
.flag_init_logical
= GFC_INIT_LOGICAL_OFF
;
98 gfc_option
.flag_init_character
= GFC_INIT_CHARACTER_OFF
;
99 gfc_option
.flag_init_character_value
= (char)0;
102 /* All except GFC_FPE_INEXACT. */
103 gfc_option
.fpe_summary
= GFC_FPE_INVALID
| GFC_FPE_DENORMAL
104 | GFC_FPE_ZERO
| GFC_FPE_OVERFLOW
106 gfc_option
.rtcheck
= 0;
108 /* ??? Wmissing-include-dirs is disabled by default in C/C++ but
109 enabled by default in Fortran. Ideally, we should express this
110 in .opt, but that is not supported yet. */
111 if (!global_options_set
.x_cpp_warn_missing_include_dirs
)
112 global_options
.x_cpp_warn_missing_include_dirs
= 1;
116 set_default_std_flags ();
118 /* Initialize cpp-related options. */
119 gfc_cpp_init_options (decoded_options_count
, decoded_options
);
120 gfc_diagnostics_init ();
124 /* Determine the source form from the filename extension. We assume
125 case insensitivity. */
127 static gfc_source_form
128 form_from_filename (const char *filename
)
132 const char *extension
;
133 gfc_source_form form
;
160 }; /* sentinel value */
162 gfc_source_form f_form
;
166 /* Find end of file name. Note, filename is either a NULL pointer or
167 a NUL terminated string. */
169 while (filename
[i
] != '\0')
172 /* Find last period. */
173 while (i
>= 0 && (filename
[i
] != '.'))
176 /* Did we see a file extension? */
178 return FORM_UNKNOWN
; /* Nope */
180 /* Get file extension and compare it to others. */
181 fileext
= &(filename
[i
]);
184 f_form
= FORM_UNKNOWN
;
188 if (strcasecmp (fileext
, exttype
[i
].extension
) == 0)
190 f_form
= exttype
[i
].form
;
194 while (exttype
[i
].form
!= FORM_UNKNOWN
);
200 /* Finalize commandline options. */
203 gfc_post_options (const char **pfilename
)
205 const char *filename
= *pfilename
, *canon_source_file
= NULL
;
209 /* Excess precision other than "fast" requires front-end
211 if (flag_excess_precision_cmdline
== EXCESS_PRECISION_STANDARD
212 && TARGET_FLT_EVAL_METHOD_NON_DEFAULT
)
213 sorry ("-fexcess-precision=standard for Fortran");
214 flag_excess_precision_cmdline
= EXCESS_PRECISION_FAST
;
216 /* Fortran allows associative math - but we cannot reassociate if
217 we want traps or signed zeros. Cf. also flag_protect_parens. */
218 if (flag_associative_math
== -1)
219 flag_associative_math
= (!flag_trapping_math
&& !flag_signed_zeros
);
221 if (flag_protect_parens
== -1)
222 flag_protect_parens
= !optimize_fast
;
224 if (flag_stack_arrays
== -1)
225 flag_stack_arrays
= optimize_fast
;
227 /* By default, disable (re)allocation during assignment for -std=f95,
228 and enable it for F2003/F2008/GNU/Legacy. */
229 if (flag_realloc_lhs
== -1)
231 if (gfc_option
.allow_std
& GFC_STD_F2003
)
232 flag_realloc_lhs
= 1;
234 flag_realloc_lhs
= 0;
237 /* -fbounds-check is equivalent to -fcheck=bounds */
238 if (flag_bounds_check
)
239 gfc_option
.rtcheck
|= GFC_RTCHECK_BOUNDS
;
241 if (flag_compare_debug
)
242 flag_dump_fortran_original
= 0;
244 /* Make -fmax-errors visible to gfortran's diagnostic machinery. */
245 if (global_options_set
.x_flag_max_errors
)
246 gfc_option
.max_errors
= flag_max_errors
;
248 /* Verify the input file name. */
249 if (!filename
|| strcmp (filename
, "-") == 0)
254 if (gfc_option
.flag_preprocessed
)
256 /* For preprocessed files, if the first tokens are of the form # NUM.
257 handle the directives so we know the original file name. */
258 gfc_source_file
= gfc_read_orig_filename (filename
, &canon_source_file
);
259 if (gfc_source_file
== NULL
)
260 gfc_source_file
= filename
;
262 *pfilename
= gfc_source_file
;
265 gfc_source_file
= filename
;
267 if (canon_source_file
== NULL
)
268 canon_source_file
= gfc_source_file
;
270 /* Adds the path where the source file is to the list of include files. */
272 i
= strlen (canon_source_file
);
273 while (i
> 0 && !IS_DIR_SEPARATOR (canon_source_file
[i
]))
278 source_path
= (char *) alloca (i
+ 1);
279 memcpy (source_path
, canon_source_file
, i
);
281 gfc_add_include_path (source_path
, true, true, true);
284 gfc_add_include_path (".", true, true, true);
286 if (canon_source_file
!= gfc_source_file
)
287 free (CONST_CAST (char *, canon_source_file
));
289 /* Decide which form the file will be read in as. */
291 if (gfc_option
.source_form
!= FORM_UNKNOWN
)
292 gfc_current_form
= gfc_option
.source_form
;
295 gfc_current_form
= form_from_filename (filename
);
297 if (gfc_current_form
== FORM_UNKNOWN
)
299 gfc_current_form
= FORM_FREE
;
300 gfc_warning_now (0, "Reading file %qs as free form",
301 (filename
[0] == '\0') ? "<stdin>" : filename
);
305 /* If the user specified -fd-lines-as-{code|comments} verify that we're
307 if (gfc_current_form
== FORM_FREE
)
309 if (gfc_option
.flag_d_lines
== 0)
310 gfc_warning_now (0, "%<-fd-lines-as-comments%> has no effect "
312 else if (gfc_option
.flag_d_lines
== 1)
313 gfc_warning_now (0, "%<-fd-lines-as-code%> has no effect in free form");
315 if (warn_line_truncation
== -1)
316 warn_line_truncation
= 1;
318 /* Enable -Werror=line-truncation when -Werror and -Wno-error have
320 if (warn_line_truncation
&& !global_options_set
.x_warnings_are_errors
321 && (global_dc
->classify_diagnostic
[OPT_Wline_truncation
] ==
323 diagnostic_classify_diagnostic (global_dc
, OPT_Wline_truncation
,
324 DK_ERROR
, UNKNOWN_LOCATION
);
326 else if (warn_line_truncation
== -1)
327 warn_line_truncation
= 0;
329 /* If -pedantic, warn about the use of GNU extensions. */
330 if (pedantic
&& (gfc_option
.allow_std
& GFC_STD_GNU
) != 0)
331 gfc_option
.warn_std
|= GFC_STD_GNU
;
332 /* -std=legacy -pedantic is effectively -std=gnu. */
333 if (pedantic
&& (gfc_option
.allow_std
& GFC_STD_LEGACY
) != 0)
334 gfc_option
.warn_std
|= GFC_STD_F95_OBS
| GFC_STD_F95_DEL
| GFC_STD_LEGACY
;
336 /* If the user didn't explicitly specify -f(no)-second-underscore we
337 use it if we're trying to be compatible with f2c, and not
339 if (flag_second_underscore
== -1)
340 flag_second_underscore
= flag_f2c
;
342 if (!flag_automatic
&& flag_max_stack_var_size
!= -2
343 && flag_max_stack_var_size
!= 0)
344 gfc_warning_now (0, "Flag %<-fno-automatic%> overwrites %<-fmax-stack-var-size=%d%>",
345 flag_max_stack_var_size
);
346 else if (!flag_automatic
&& flag_recursive
)
347 gfc_warning_now (0, "Flag %<-fno-automatic%> overwrites %<-frecursive%>");
348 else if (!flag_automatic
&& flag_openmp
)
349 gfc_warning_now (0, "Flag %<-fno-automatic%> overwrites %<-frecursive%> implied by "
351 else if (flag_max_stack_var_size
!= -2 && flag_recursive
)
352 gfc_warning_now (0, "Flag %<-frecursive%> overwrites %<-fmax-stack-var-size=%d%>",
353 flag_max_stack_var_size
);
354 else if (flag_max_stack_var_size
!= -2 && flag_openmp
)
355 gfc_warning_now (0, "Flag %<-fmax-stack-var-size=%d%> overwrites %<-frecursive%> "
356 "implied by %<-fopenmp%>", flag_max_stack_var_size
);
358 /* Implement -frecursive as -fmax-stack-var-size=-1. */
360 flag_max_stack_var_size
= -1;
362 /* Implied -frecursive; implemented as -fmax-stack-var-size=-1. */
363 if (flag_max_stack_var_size
== -2 && flag_openmp
&& flag_automatic
)
366 flag_max_stack_var_size
= -1;
370 if (flag_max_stack_var_size
== -2)
371 flag_max_stack_var_size
= 32768;
373 /* Implement -fno-automatic as -fmax-stack-var-size=0. */
375 flag_max_stack_var_size
= 0;
377 /* If we call BLAS directly, only inline up to the BLAS limit. */
379 if (flag_external_blas
&& flag_inline_matmul_limit
< 0)
380 flag_inline_matmul_limit
= flag_blas_matmul_limit
;
382 /* Optimization implies front end optimization, unless the user
383 specified it directly. */
385 if (flag_frontend_optimize
== -1)
386 flag_frontend_optimize
= optimize
;
388 if (flag_max_array_constructor
< 65535)
389 flag_max_array_constructor
= 65535;
391 if (flag_fixed_line_length
!= 0 && flag_fixed_line_length
< 7)
392 gfc_fatal_error ("Fixed line length must be at least seven");
394 if (flag_free_line_length
!= 0 && flag_free_line_length
< 4)
395 gfc_fatal_error ("Free line length must be at least three");
397 if (flag_max_subrecord_length
> MAX_SUBRECORD_LENGTH
)
398 gfc_fatal_error ("Maximum subrecord length cannot exceed %d",
399 MAX_SUBRECORD_LENGTH
);
401 gfc_cpp_post_options ();
403 if (gfc_option
.allow_std
& GFC_STD_F2008
)
404 lang_hooks
.name
= "GNU Fortran2008";
405 else if (gfc_option
.allow_std
& GFC_STD_F2003
)
406 lang_hooks
.name
= "GNU Fortran2003";
408 return gfc_cpp_preprocess_only ();
413 gfc_handle_module_path_options (const char *arg
)
416 if (gfc_option
.module_dir
!= NULL
)
417 gfc_fatal_error ("gfortran: Only one %<-J%> option allowed");
419 gfc_option
.module_dir
= XCNEWVEC (char, strlen (arg
) + 2);
420 strcpy (gfc_option
.module_dir
, arg
);
422 gfc_add_include_path (gfc_option
.module_dir
, true, false, true);
424 strcat (gfc_option
.module_dir
, "/");
428 /* Handle options -ffpe-trap= and -ffpe-summary=. */
431 gfc_handle_fpe_option (const char *arg
, bool trap
)
433 int result
, pos
= 0, n
;
434 /* precision is a backwards compatibility alias for inexact. */
435 static const char * const exception
[] = { "invalid", "denormal", "zero",
436 "overflow", "underflow",
437 "inexact", "precision", NULL
};
438 static const int opt_exception
[] = { GFC_FPE_INVALID
, GFC_FPE_DENORMAL
,
439 GFC_FPE_ZERO
, GFC_FPE_OVERFLOW
,
440 GFC_FPE_UNDERFLOW
, GFC_FPE_INEXACT
,
444 /* As the default for -ffpe-summary= is nonzero, set it to 0. */
446 gfc_option
.fpe_summary
= 0;
453 while (arg
[pos
] && arg
[pos
] != ',')
457 if (!trap
&& strncmp ("none", arg
, pos
) == 0)
459 gfc_option
.fpe_summary
= 0;
464 else if (!trap
&& strncmp ("all", arg
, pos
) == 0)
466 gfc_option
.fpe_summary
= GFC_FPE_INVALID
| GFC_FPE_DENORMAL
467 | GFC_FPE_ZERO
| GFC_FPE_OVERFLOW
468 | GFC_FPE_UNDERFLOW
| GFC_FPE_INEXACT
;
474 for (n
= 0; exception
[n
] != NULL
; n
++)
476 if (exception
[n
] && strncmp (exception
[n
], arg
, pos
) == 0)
479 gfc_option
.fpe
|= opt_exception
[n
];
481 gfc_option
.fpe_summary
|= opt_exception
[n
];
488 if (!result
&& !trap
)
489 gfc_fatal_error ("Argument to %<-ffpe-trap%> is not valid: %s", arg
);
491 gfc_fatal_error ("Argument to %<-ffpe-summary%> is not valid: %s", arg
);
498 gfc_handle_runtime_check_option (const char *arg
)
500 int result
, pos
= 0, n
;
501 static const char * const optname
[] = { "all", "bounds", "array-temps",
502 "recursion", "do", "pointer",
504 static const int optmask
[] = { GFC_RTCHECK_ALL
, GFC_RTCHECK_BOUNDS
,
505 GFC_RTCHECK_ARRAY_TEMPS
,
506 GFC_RTCHECK_RECURSION
, GFC_RTCHECK_DO
,
507 GFC_RTCHECK_POINTER
, GFC_RTCHECK_MEM
,
515 while (arg
[pos
] && arg
[pos
] != ',')
519 for (n
= 0; optname
[n
] != NULL
; n
++)
521 if (optname
[n
] && strncmp (optname
[n
], arg
, pos
) == 0)
523 gfc_option
.rtcheck
|= optmask
[n
];
529 else if (optname
[n
] && pos
> 3 && strncmp ("no-", arg
, 3) == 0
530 && strncmp (optname
[n
], arg
+3, pos
-3) == 0)
532 gfc_option
.rtcheck
&= ~optmask
[n
];
540 gfc_fatal_error ("Argument to %<-fcheck%> is not valid: %s", arg
);
545 /* Handle command-line options. Returns 0 if unrecognized, 1 if
546 recognized and handled. */
549 gfc_handle_option (size_t scode
, const char *arg
, int value
,
550 int kind ATTRIBUTE_UNUSED
, location_t loc ATTRIBUTE_UNUSED
,
551 const struct cl_option_handlers
*handlers ATTRIBUTE_UNUSED
)
554 enum opt_code code
= (enum opt_code
) scode
;
556 if (gfc_cpp_handle_option (scode
, arg
, value
) == 1)
562 if (cl_options
[code
].flags
& gfc_option_lang_mask ())
567 case OPT_fcheck_array_temporaries
:
568 gfc_option
.rtcheck
|= GFC_RTCHECK_ARRAY_TEMPS
;
571 case OPT_fd_lines_as_code
:
572 gfc_option
.flag_d_lines
= 1;
575 case OPT_fd_lines_as_comments
:
576 gfc_option
.flag_d_lines
= 0;
579 case OPT_ffixed_form
:
580 gfc_option
.source_form
= FORM_FIXED
;
584 gfc_option
.source_form
= FORM_FREE
;
587 case OPT_static_libgfortran
:
588 #ifndef HAVE_LD_STATIC_DYNAMIC
589 gfc_fatal_error ("%<-static-libgfortran%> is not supported in this "
594 case OPT_fintrinsic_modules_path
:
595 case OPT_fintrinsic_modules_path_
:
597 /* This is needed because omp_lib.h is in a directory together
598 with intrinsic modules. Do no warn because during testing
599 without an installed compiler, we would get lots of bogus
600 warnings for a missing include directory. */
601 gfc_add_include_path (arg
, false, false, false);
603 gfc_add_intrinsic_modules_path (arg
);
606 case OPT_fpreprocessed
:
607 gfc_option
.flag_preprocessed
= value
;
610 case OPT_fmax_identifier_length_
:
611 if (value
> GFC_MAX_SYMBOL_LEN
)
612 gfc_fatal_error ("Maximum supported identifier length is %d",
614 gfc_option
.max_identifier_length
= value
;
617 case OPT_finit_local_zero
:
618 gfc_option
.flag_init_integer
= GFC_INIT_INTEGER_ON
;
619 gfc_option
.flag_init_integer_value
= 0;
620 flag_init_real
= GFC_INIT_REAL_ZERO
;
621 gfc_option
.flag_init_logical
= GFC_INIT_LOGICAL_FALSE
;
622 gfc_option
.flag_init_character
= GFC_INIT_CHARACTER_ON
;
623 gfc_option
.flag_init_character_value
= (char)0;
626 case OPT_finit_logical_
:
627 if (!strcasecmp (arg
, "false"))
628 gfc_option
.flag_init_logical
= GFC_INIT_LOGICAL_FALSE
;
629 else if (!strcasecmp (arg
, "true"))
630 gfc_option
.flag_init_logical
= GFC_INIT_LOGICAL_TRUE
;
632 gfc_fatal_error ("Unrecognized option to %<-finit-logical%>: %s",
636 case OPT_finit_integer_
:
637 gfc_option
.flag_init_integer
= GFC_INIT_INTEGER_ON
;
638 gfc_option
.flag_init_integer_value
= atoi (arg
);
641 case OPT_finit_character_
:
642 if (value
>= 0 && value
<= 127)
644 gfc_option
.flag_init_character
= GFC_INIT_CHARACTER_ON
;
645 gfc_option
.flag_init_character_value
= (char)value
;
648 gfc_fatal_error ("The value of n in %<-finit-character=n%> must be "
649 "between 0 and 127");
653 gfc_add_include_path (arg
, true, false, true);
657 gfc_handle_module_path_options (arg
);
661 gfc_handle_fpe_option (arg
, true);
664 case OPT_ffpe_summary_
:
665 gfc_handle_fpe_option (arg
, false);
669 gfc_option
.allow_std
= GFC_STD_F95_OBS
| GFC_STD_F95
| GFC_STD_F77
671 gfc_option
.warn_std
= GFC_STD_F95_OBS
;
672 gfc_option
.max_continue_fixed
= 19;
673 gfc_option
.max_continue_free
= 39;
674 gfc_option
.max_identifier_length
= 31;
680 gfc_option
.allow_std
= GFC_STD_F95_OBS
| GFC_STD_F77
681 | GFC_STD_F2003
| GFC_STD_F95
| GFC_STD_F2008_OBS
;
682 gfc_option
.warn_std
= GFC_STD_F95_OBS
;
683 gfc_option
.max_identifier_length
= 63;
689 gfc_option
.allow_std
= GFC_STD_F95_OBS
| GFC_STD_F77
690 | GFC_STD_F2003
| GFC_STD_F95
| GFC_STD_F2008
| GFC_STD_F2008_OBS
;
691 gfc_option
.warn_std
= GFC_STD_F95_OBS
| GFC_STD_F2008_OBS
;
692 gfc_option
.max_identifier_length
= 63;
697 case OPT_std_f2008ts
:
698 gfc_option
.allow_std
= GFC_STD_F95_OBS
| GFC_STD_F77
699 | GFC_STD_F2003
| GFC_STD_F95
| GFC_STD_F2008
| GFC_STD_F2008_OBS
701 gfc_option
.warn_std
= GFC_STD_F95_OBS
| GFC_STD_F2008_OBS
;
702 gfc_option
.max_identifier_length
= 63;
708 set_default_std_flags ();
712 set_default_std_flags ();
713 gfc_option
.warn_std
= 0;
716 case OPT_fshort_enums
:
717 /* Handled in language-independent code. */
721 gfc_handle_runtime_check_option (arg
);
725 /* Enable all DEC extensions. */
729 case OPT_fdec_structure
:
730 gfc_option
.flag_dec_structure
= 1;
734 Fortran_handle_option_auto (&global_options
, &global_options_set
,
736 gfc_option_lang_mask (), kind
,
737 loc
, handlers
, global_dc
);
742 /* Return a string with the options passed to the compiler; used for
743 Fortran's compiler_options() intrinsic. */
746 gfc_get_option_string (void)
752 /* Allocate and return a one-character string with '\0'. */
753 if (!save_decoded_options_count
)
754 return XCNEWVEC (char, 1);
756 /* Determine required string length. */
759 for (j
= 1; j
< save_decoded_options_count
; j
++)
761 switch (save_decoded_options
[j
].opt_index
)
770 case OPT_fintrinsic_modules_path
:
771 case OPT_fintrinsic_modules_path_
:
775 /* Ignore file names. */
776 if (save_decoded_options
[j
].orig_option_with_args_text
[0] == '-')
778 + strlen (save_decoded_options
[j
].orig_option_with_args_text
);
782 result
= XCNEWVEC (char, len
);
785 for (j
= 1; j
< save_decoded_options_count
; j
++)
787 switch (save_decoded_options
[j
].opt_index
)
796 case OPT_fintrinsic_modules_path
:
797 case OPT_fintrinsic_modules_path_
:
802 /* Use "-cpp" rather than "-cpp=<temporary file>". */
807 /* Ignore file names. */
808 if (save_decoded_options
[j
].orig_option_with_args_text
[0] != '-')
811 len
= strlen (save_decoded_options
[j
].orig_option_with_args_text
);
814 memcpy (&result
[pos
], save_decoded_options
[j
].orig_option_with_args_text
, len
);
819 result
[--pos
] = '\0';