1 /* Parse and display command line options.
2 Copyright (C) 2000-2015 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"
28 #include "toplev.h" /* For save_decoded_options. */
31 #include "tree-inline.h"
35 #include "diagnostic.h" /* For global_dc. */
38 gfc_option_t gfc_option
;
41 /* Set flags that control warnings and errors for different
42 Fortran standards to their default values. Keep in sync with
43 libgfortran/runtime/compile_options.c (init_compile_options). */
46 set_default_std_flags (void)
48 gfc_option
.allow_std
= GFC_STD_F95_OBS
| GFC_STD_F95_DEL
49 | GFC_STD_F2003
| GFC_STD_F2008
| GFC_STD_F95
| GFC_STD_F77
50 | GFC_STD_F2008_OBS
| GFC_STD_F2008_TS
| GFC_STD_GNU
| GFC_STD_LEGACY
;
51 gfc_option
.warn_std
= GFC_STD_F95_DEL
| GFC_STD_LEGACY
;
55 /* Return language mask for Fortran options. */
58 gfc_option_lang_mask (void)
63 /* Initialize options structure OPTS. */
66 gfc_init_options_struct (struct gcc_options
*opts
)
68 opts
->x_flag_errno_math
= 0;
69 opts
->frontend_set_flag_errno_math
= true;
70 opts
->x_flag_associative_math
= -1;
71 opts
->frontend_set_flag_associative_math
= true;
74 /* Get ready for options handling. Keep in sync with
75 libgfortran/runtime/compile_options.c (init_compile_options). */
78 gfc_init_options (unsigned int decoded_options_count
,
79 struct cl_decoded_option
*decoded_options
)
81 gfc_source_file
= NULL
;
82 gfc_option
.module_dir
= NULL
;
83 gfc_option
.source_form
= FORM_UNKNOWN
;
84 gfc_option
.max_continue_fixed
= 255;
85 gfc_option
.max_continue_free
= 255;
86 gfc_option
.max_identifier_length
= GFC_MAX_SYMBOL_LEN
;
87 gfc_option
.max_errors
= 25;
89 gfc_option
.flag_preprocessed
= 0;
90 gfc_option
.flag_d_lines
= -1;
91 gfc_option
.flag_init_integer
= GFC_INIT_INTEGER_OFF
;
92 gfc_option
.flag_init_integer_value
= 0;
93 gfc_option
.flag_init_logical
= GFC_INIT_LOGICAL_OFF
;
94 gfc_option
.flag_init_character
= GFC_INIT_CHARACTER_OFF
;
95 gfc_option
.flag_init_character_value
= (char)0;
98 /* All except GFC_FPE_INEXACT. */
99 gfc_option
.fpe_summary
= GFC_FPE_INVALID
| GFC_FPE_DENORMAL
100 | GFC_FPE_ZERO
| GFC_FPE_OVERFLOW
102 gfc_option
.rtcheck
= 0;
104 /* ??? Wmissing-include-dirs is disabled by default in C/C++ but
105 enabled by default in Fortran. Ideally, we should express this
106 in .opt, but that is not supported yet. */
107 if (!global_options_set
.x_cpp_warn_missing_include_dirs
)
108 global_options
.x_cpp_warn_missing_include_dirs
= 1;;
110 set_default_std_flags ();
112 /* Initialize cpp-related options. */
113 gfc_cpp_init_options (decoded_options_count
, decoded_options
);
114 gfc_diagnostics_init ();
118 /* Determine the source form from the filename extension. We assume
119 case insensitivity. */
121 static gfc_source_form
122 form_from_filename (const char *filename
)
126 const char *extension
;
127 gfc_source_form form
;
154 }; /* sentinel value */
156 gfc_source_form f_form
;
160 /* Find end of file name. Note, filename is either a NULL pointer or
161 a NUL terminated string. */
163 while (filename
[i
] != '\0')
166 /* Find last period. */
167 while (i
>= 0 && (filename
[i
] != '.'))
170 /* Did we see a file extension? */
172 return FORM_UNKNOWN
; /* Nope */
174 /* Get file extension and compare it to others. */
175 fileext
= &(filename
[i
]);
178 f_form
= FORM_UNKNOWN
;
182 if (strcasecmp (fileext
, exttype
[i
].extension
) == 0)
184 f_form
= exttype
[i
].form
;
188 while (exttype
[i
].form
!= FORM_UNKNOWN
);
194 /* Finalize commandline options. */
197 gfc_post_options (const char **pfilename
)
199 const char *filename
= *pfilename
, *canon_source_file
= NULL
;
203 /* Excess precision other than "fast" requires front-end
205 if (flag_excess_precision_cmdline
== EXCESS_PRECISION_STANDARD
206 && TARGET_FLT_EVAL_METHOD_NON_DEFAULT
)
207 sorry ("-fexcess-precision=standard for Fortran");
208 flag_excess_precision_cmdline
= EXCESS_PRECISION_FAST
;
210 /* Fortran allows associative math - but we cannot reassociate if
211 we want traps or signed zeros. Cf. also flag_protect_parens. */
212 if (flag_associative_math
== -1)
213 flag_associative_math
= (!flag_trapping_math
&& !flag_signed_zeros
);
215 if (flag_protect_parens
== -1)
216 flag_protect_parens
= !optimize_fast
;
218 if (flag_stack_arrays
== -1)
219 flag_stack_arrays
= optimize_fast
;
221 /* By default, disable (re)allocation during assignment for -std=f95,
222 and enable it for F2003/F2008/GNU/Legacy. */
223 if (flag_realloc_lhs
== -1)
225 if (gfc_option
.allow_std
& GFC_STD_F2003
)
226 flag_realloc_lhs
= 1;
228 flag_realloc_lhs
= 0;
231 /* -fbounds-check is equivalent to -fcheck=bounds */
232 if (flag_bounds_check
)
233 gfc_option
.rtcheck
|= GFC_RTCHECK_BOUNDS
;
235 if (flag_compare_debug
)
236 flag_dump_fortran_original
= 0;
238 /* Make -fmax-errors visible to gfortran's diagnostic machinery. */
239 if (global_options_set
.x_flag_max_errors
)
240 gfc_option
.max_errors
= flag_max_errors
;
242 /* Verify the input file name. */
243 if (!filename
|| strcmp (filename
, "-") == 0)
248 if (gfc_option
.flag_preprocessed
)
250 /* For preprocessed files, if the first tokens are of the form # NUM.
251 handle the directives so we know the original file name. */
252 gfc_source_file
= gfc_read_orig_filename (filename
, &canon_source_file
);
253 if (gfc_source_file
== NULL
)
254 gfc_source_file
= filename
;
256 *pfilename
= gfc_source_file
;
259 gfc_source_file
= filename
;
261 if (canon_source_file
== NULL
)
262 canon_source_file
= gfc_source_file
;
264 /* Adds the path where the source file is to the list of include files. */
266 i
= strlen (canon_source_file
);
267 while (i
> 0 && !IS_DIR_SEPARATOR (canon_source_file
[i
]))
272 source_path
= (char *) alloca (i
+ 1);
273 memcpy (source_path
, canon_source_file
, i
);
275 gfc_add_include_path (source_path
, true, true, true);
278 gfc_add_include_path (".", true, true, true);
280 if (canon_source_file
!= gfc_source_file
)
281 free (CONST_CAST (char *, canon_source_file
));
283 /* Decide which form the file will be read in as. */
285 if (gfc_option
.source_form
!= FORM_UNKNOWN
)
286 gfc_current_form
= gfc_option
.source_form
;
289 gfc_current_form
= form_from_filename (filename
);
291 if (gfc_current_form
== FORM_UNKNOWN
)
293 gfc_current_form
= FORM_FREE
;
294 gfc_warning_now ("Reading file %qs as free form",
295 (filename
[0] == '\0') ? "<stdin>" : filename
);
299 /* If the user specified -fd-lines-as-{code|comments} verify that we're
301 if (gfc_current_form
== FORM_FREE
)
303 if (gfc_option
.flag_d_lines
== 0)
304 gfc_warning_now ("%<-fd-lines-as-comments%> has no effect "
306 else if (gfc_option
.flag_d_lines
== 1)
307 gfc_warning_now ("%<-fd-lines-as-code%> has no effect in free form");
310 /* If -pedantic, warn about the use of GNU extensions. */
311 if (pedantic
&& (gfc_option
.allow_std
& GFC_STD_GNU
) != 0)
312 gfc_option
.warn_std
|= GFC_STD_GNU
;
313 /* -std=legacy -pedantic is effectively -std=gnu. */
314 if (pedantic
&& (gfc_option
.allow_std
& GFC_STD_LEGACY
) != 0)
315 gfc_option
.warn_std
|= GFC_STD_F95_OBS
| GFC_STD_F95_DEL
| GFC_STD_LEGACY
;
317 /* If the user didn't explicitly specify -f(no)-second-underscore we
318 use it if we're trying to be compatible with f2c, and not
320 if (flag_second_underscore
== -1)
321 flag_second_underscore
= flag_f2c
;
323 if (!flag_automatic
&& flag_max_stack_var_size
!= -2
324 && flag_max_stack_var_size
!= 0)
325 gfc_warning_now ("Flag %<-fno-automatic%> overwrites %<-fmax-stack-var-size=%d%>",
326 flag_max_stack_var_size
);
327 else if (!flag_automatic
&& flag_recursive
)
328 gfc_warning_now ("Flag %<-fno-automatic%> overwrites %<-frecursive%>");
329 else if (!flag_automatic
&& flag_openmp
)
330 gfc_warning_now ("Flag %<-fno-automatic%> overwrites %<-frecursive%> implied by "
332 else if (flag_max_stack_var_size
!= -2 && flag_recursive
)
333 gfc_warning_now ("Flag %<-frecursive%> overwrites %<-fmax-stack-var-size=%d%>",
334 flag_max_stack_var_size
);
335 else if (flag_max_stack_var_size
!= -2 && flag_openmp
)
336 gfc_warning_now ("Flag %<-fmax-stack-var-size=%d%> overwrites %<-frecursive%> "
337 "implied by %<-fopenmp%>", flag_max_stack_var_size
);
339 /* Implement -frecursive as -fmax-stack-var-size=-1. */
341 flag_max_stack_var_size
= -1;
343 /* Implied -frecursive; implemented as -fmax-stack-var-size=-1. */
344 if (flag_max_stack_var_size
== -2 && flag_openmp
&& flag_automatic
)
347 flag_max_stack_var_size
= -1;
351 if (flag_max_stack_var_size
== -2)
352 flag_max_stack_var_size
= 32768;
354 /* Implement -fno-automatic as -fmax-stack-var-size=0. */
356 flag_max_stack_var_size
= 0;
358 /* Optimization implies front end optimization, unless the user
359 specified it directly. */
361 if (flag_frontend_optimize
== -1)
362 flag_frontend_optimize
= optimize
;
364 if (flag_max_array_constructor
< 65535)
365 flag_max_array_constructor
= 65535;
367 if (flag_fixed_line_length
!= 0 && flag_fixed_line_length
< 7)
368 gfc_fatal_error ("Fixed line length must be at least seven");
370 if (flag_free_line_length
!= 0 && flag_free_line_length
< 4)
371 gfc_fatal_error ("Free line length must be at least three");
373 if (flag_max_subrecord_length
> MAX_SUBRECORD_LENGTH
)
374 gfc_fatal_error ("Maximum subrecord length cannot exceed %d",
375 MAX_SUBRECORD_LENGTH
);
377 gfc_cpp_post_options ();
379 return gfc_cpp_preprocess_only ();
384 gfc_handle_module_path_options (const char *arg
)
387 if (gfc_option
.module_dir
!= NULL
)
388 gfc_fatal_error ("gfortran: Only one %<-J%> option allowed");
390 gfc_option
.module_dir
= XCNEWVEC (char, strlen (arg
) + 2);
391 strcpy (gfc_option
.module_dir
, arg
);
393 gfc_add_include_path (gfc_option
.module_dir
, true, false, true);
395 strcat (gfc_option
.module_dir
, "/");
399 /* Handle options -ffpe-trap= and -ffpe-summary=. */
402 gfc_handle_fpe_option (const char *arg
, bool trap
)
404 int result
, pos
= 0, n
;
405 /* precision is a backwards compatibility alias for inexact. */
406 static const char * const exception
[] = { "invalid", "denormal", "zero",
407 "overflow", "underflow",
408 "inexact", "precision", NULL
};
409 static const int opt_exception
[] = { GFC_FPE_INVALID
, GFC_FPE_DENORMAL
,
410 GFC_FPE_ZERO
, GFC_FPE_OVERFLOW
,
411 GFC_FPE_UNDERFLOW
, GFC_FPE_INEXACT
,
415 /* As the default for -ffpe-summary= is nonzero, set it to 0. */
417 gfc_option
.fpe_summary
= 0;
424 while (arg
[pos
] && arg
[pos
] != ',')
428 if (!trap
&& strncmp ("none", arg
, pos
) == 0)
430 gfc_option
.fpe_summary
= 0;
435 else if (!trap
&& strncmp ("all", arg
, pos
) == 0)
437 gfc_option
.fpe_summary
= GFC_FPE_INVALID
| GFC_FPE_DENORMAL
438 | GFC_FPE_ZERO
| GFC_FPE_OVERFLOW
439 | GFC_FPE_UNDERFLOW
| GFC_FPE_INEXACT
;
445 for (n
= 0; exception
[n
] != NULL
; n
++)
447 if (exception
[n
] && strncmp (exception
[n
], arg
, pos
) == 0)
450 gfc_option
.fpe
|= opt_exception
[n
];
452 gfc_option
.fpe_summary
|= opt_exception
[n
];
459 if (!result
&& !trap
)
460 gfc_fatal_error ("Argument to %<-ffpe-trap%> is not valid: %s", arg
);
462 gfc_fatal_error ("Argument to %<-ffpe-summary%> is not valid: %s", arg
);
469 gfc_handle_runtime_check_option (const char *arg
)
471 int result
, pos
= 0, n
;
472 static const char * const optname
[] = { "all", "bounds", "array-temps",
473 "recursion", "do", "pointer",
475 static const int optmask
[] = { GFC_RTCHECK_ALL
, GFC_RTCHECK_BOUNDS
,
476 GFC_RTCHECK_ARRAY_TEMPS
,
477 GFC_RTCHECK_RECURSION
, GFC_RTCHECK_DO
,
478 GFC_RTCHECK_POINTER
, GFC_RTCHECK_MEM
,
486 while (arg
[pos
] && arg
[pos
] != ',')
490 for (n
= 0; optname
[n
] != NULL
; n
++)
492 if (optname
[n
] && strncmp (optname
[n
], arg
, pos
) == 0)
494 gfc_option
.rtcheck
|= optmask
[n
];
502 gfc_fatal_error ("Argument to %<-fcheck%> is not valid: %s", arg
);
507 /* Handle command-line options. Returns 0 if unrecognized, 1 if
508 recognized and handled. */
511 gfc_handle_option (size_t scode
, const char *arg
, int value
,
512 int kind ATTRIBUTE_UNUSED
, location_t loc ATTRIBUTE_UNUSED
,
513 const struct cl_option_handlers
*handlers ATTRIBUTE_UNUSED
)
516 enum opt_code code
= (enum opt_code
) scode
;
518 if (gfc_cpp_handle_option (scode
, arg
, value
) == 1)
524 if (cl_options
[code
].flags
& gfc_option_lang_mask ())
529 case OPT_fcheck_array_temporaries
:
530 gfc_option
.rtcheck
|= GFC_RTCHECK_ARRAY_TEMPS
;
533 case OPT_fd_lines_as_code
:
534 gfc_option
.flag_d_lines
= 1;
537 case OPT_fd_lines_as_comments
:
538 gfc_option
.flag_d_lines
= 0;
541 case OPT_ffixed_form
:
542 gfc_option
.source_form
= FORM_FIXED
;
546 gfc_option
.source_form
= FORM_FREE
;
549 case OPT_static_libgfortran
:
550 #ifndef HAVE_LD_STATIC_DYNAMIC
551 gfc_fatal_error ("%<-static-libgfortran%> is not supported in this "
556 case OPT_fintrinsic_modules_path
:
557 case OPT_fintrinsic_modules_path_
:
559 /* This is needed because omp_lib.h is in a directory together
560 with intrinsic modules. Do no warn because during testing
561 without an installed compiler, we would get lots of bogus
562 warnings for a missing include directory. */
563 gfc_add_include_path (arg
, false, false, false);
565 gfc_add_intrinsic_modules_path (arg
);
568 case OPT_fpreprocessed
:
569 gfc_option
.flag_preprocessed
= value
;
572 case OPT_fmax_identifier_length_
:
573 if (value
> GFC_MAX_SYMBOL_LEN
)
574 gfc_fatal_error ("Maximum supported identifier length is %d",
576 gfc_option
.max_identifier_length
= value
;
579 case OPT_finit_local_zero
:
580 gfc_option
.flag_init_integer
= GFC_INIT_INTEGER_ON
;
581 gfc_option
.flag_init_integer_value
= 0;
582 flag_init_real
= GFC_INIT_REAL_ZERO
;
583 gfc_option
.flag_init_logical
= GFC_INIT_LOGICAL_FALSE
;
584 gfc_option
.flag_init_character
= GFC_INIT_CHARACTER_ON
;
585 gfc_option
.flag_init_character_value
= (char)0;
588 case OPT_finit_logical_
:
589 if (!strcasecmp (arg
, "false"))
590 gfc_option
.flag_init_logical
= GFC_INIT_LOGICAL_FALSE
;
591 else if (!strcasecmp (arg
, "true"))
592 gfc_option
.flag_init_logical
= GFC_INIT_LOGICAL_TRUE
;
594 gfc_fatal_error ("Unrecognized option to %<-finit-logical%>: %s",
598 case OPT_finit_integer_
:
599 gfc_option
.flag_init_integer
= GFC_INIT_INTEGER_ON
;
600 gfc_option
.flag_init_integer_value
= atoi (arg
);
603 case OPT_finit_character_
:
604 if (value
>= 0 && value
<= 127)
606 gfc_option
.flag_init_character
= GFC_INIT_CHARACTER_ON
;
607 gfc_option
.flag_init_character_value
= (char)value
;
610 gfc_fatal_error ("The value of n in %<-finit-character=n%> must be "
611 "between 0 and 127");
615 gfc_add_include_path (arg
, true, false, true);
619 gfc_handle_module_path_options (arg
);
623 gfc_handle_fpe_option (arg
, true);
626 case OPT_ffpe_summary_
:
627 gfc_handle_fpe_option (arg
, false);
631 gfc_option
.allow_std
= GFC_STD_F95_OBS
| GFC_STD_F95
| GFC_STD_F77
633 gfc_option
.warn_std
= GFC_STD_F95_OBS
;
634 gfc_option
.max_continue_fixed
= 19;
635 gfc_option
.max_continue_free
= 39;
636 gfc_option
.max_identifier_length
= 31;
642 gfc_option
.allow_std
= GFC_STD_F95_OBS
| GFC_STD_F77
643 | GFC_STD_F2003
| GFC_STD_F95
| GFC_STD_F2008_OBS
;
644 gfc_option
.warn_std
= GFC_STD_F95_OBS
;
645 gfc_option
.max_identifier_length
= 63;
651 gfc_option
.allow_std
= GFC_STD_F95_OBS
| GFC_STD_F77
652 | GFC_STD_F2003
| GFC_STD_F95
| GFC_STD_F2008
| GFC_STD_F2008_OBS
;
653 gfc_option
.warn_std
= GFC_STD_F95_OBS
| GFC_STD_F2008_OBS
;
654 gfc_option
.max_identifier_length
= 63;
659 case OPT_std_f2008ts
:
660 gfc_option
.allow_std
= GFC_STD_F95_OBS
| GFC_STD_F77
661 | GFC_STD_F2003
| GFC_STD_F95
| GFC_STD_F2008
| GFC_STD_F2008_OBS
663 gfc_option
.warn_std
= GFC_STD_F95_OBS
| GFC_STD_F2008_OBS
;
664 gfc_option
.max_identifier_length
= 63;
670 set_default_std_flags ();
674 set_default_std_flags ();
675 gfc_option
.warn_std
= 0;
678 case OPT_fshort_enums
:
679 /* Handled in language-independent code. */
683 gfc_handle_runtime_check_option (arg
);
687 Fortran_handle_option_auto (&global_options
, &global_options_set
,
689 gfc_option_lang_mask (), kind
,
690 loc
, handlers
, global_dc
);
695 /* Return a string with the options passed to the compiler; used for
696 Fortran's compiler_options() intrinsic. */
699 gfc_get_option_string (void)
705 /* Allocate and return a one-character string with '\0'. */
706 if (!save_decoded_options_count
)
707 return XCNEWVEC (char, 1);
709 /* Determine required string length. */
712 for (j
= 1; j
< save_decoded_options_count
; j
++)
714 switch (save_decoded_options
[j
].opt_index
)
723 case OPT_fintrinsic_modules_path
:
724 case OPT_fintrinsic_modules_path_
:
728 /* Ignore file names. */
729 if (save_decoded_options
[j
].orig_option_with_args_text
[0] == '-')
731 + strlen (save_decoded_options
[j
].orig_option_with_args_text
);
735 result
= XCNEWVEC (char, len
);
738 for (j
= 1; j
< save_decoded_options_count
; j
++)
740 switch (save_decoded_options
[j
].opt_index
)
749 case OPT_fintrinsic_modules_path
:
750 case OPT_fintrinsic_modules_path_
:
755 /* Use "-cpp" rather than "-cpp=<temporary file>". */
760 /* Ignore file names. */
761 if (save_decoded_options
[j
].orig_option_with_args_text
[0] != '-')
764 len
= strlen (save_decoded_options
[j
].orig_option_with_args_text
);
767 memcpy (&result
[pos
], save_decoded_options
[j
].orig_option_with_args_text
, len
);
772 result
[--pos
] = '\0';