1 /* Parse and display command line options.
2 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
3 Free Software Foundation, Inc.
4 Contributed by Andy Vaught
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/>. */
24 #include "coretypes.h"
31 #include "tree-inline.h"
35 gfc_option_t gfc_option
;
38 /* Set flags that control warnings and errors for different
39 Fortran standards to their default values. */
42 set_default_std_flags (void)
44 gfc_option
.allow_std
= GFC_STD_F95_OBS
| GFC_STD_F95_DEL
45 | GFC_STD_F2003
| GFC_STD_F95
| GFC_STD_F77
| GFC_STD_GNU
47 gfc_option
.warn_std
= GFC_STD_F95_DEL
| GFC_STD_LEGACY
;
50 /* Get ready for options handling. */
53 gfc_init_options (unsigned int argc ATTRIBUTE_UNUSED
,
54 const char **argv ATTRIBUTE_UNUSED
)
56 gfc_source_file
= NULL
;
57 gfc_option
.module_dir
= NULL
;
58 gfc_option
.source_form
= FORM_UNKNOWN
;
59 gfc_option
.fixed_line_length
= 72;
60 gfc_option
.free_line_length
= 132;
61 gfc_option
.max_continue_fixed
= 19;
62 gfc_option
.max_continue_free
= 39;
63 gfc_option
.max_identifier_length
= GFC_MAX_SYMBOL_LEN
;
64 gfc_option
.max_subrecord_length
= 0;
65 gfc_option
.convert
= CONVERT_NATIVE
;
66 gfc_option
.record_marker
= 0;
67 gfc_option
.verbose
= 0;
69 gfc_option
.warn_aliasing
= 0;
70 gfc_option
.warn_ampersand
= 0;
71 gfc_option
.warn_character_truncation
= 0;
72 gfc_option
.warn_conversion
= 0;
73 gfc_option
.warn_implicit_interface
= 0;
74 gfc_option
.warn_line_truncation
= 0;
75 gfc_option
.warn_surprising
= 0;
76 gfc_option
.warn_tabs
= 1;
77 gfc_option
.warn_underflow
= 1;
78 gfc_option
.max_errors
= 25;
80 gfc_option
.flag_all_intrinsics
= 0;
81 gfc_option
.flag_default_double
= 0;
82 gfc_option
.flag_default_integer
= 0;
83 gfc_option
.flag_default_real
= 0;
84 gfc_option
.flag_dollar_ok
= 0;
85 gfc_option
.flag_underscoring
= 1;
86 gfc_option
.flag_f2c
= 0;
87 gfc_option
.flag_second_underscore
= -1;
88 gfc_option
.flag_implicit_none
= 0;
89 gfc_option
.flag_max_stack_var_size
= 32768;
90 gfc_option
.flag_range_check
= 1;
91 gfc_option
.flag_pack_derived
= 0;
92 gfc_option
.flag_repack_arrays
= 0;
93 gfc_option
.flag_preprocessed
= 0;
94 gfc_option
.flag_automatic
= 1;
95 gfc_option
.flag_backslash
= 1;
96 gfc_option
.flag_backtrace
= 0;
97 gfc_option
.flag_allow_leading_underscore
= 0;
98 gfc_option
.flag_dump_core
= 0;
99 gfc_option
.flag_external_blas
= 0;
100 gfc_option
.blas_matmul_limit
= 30;
101 gfc_option
.flag_cray_pointer
= 0;
102 gfc_option
.flag_d_lines
= -1;
103 gfc_option
.flag_openmp
= 0;
104 gfc_option
.flag_sign_zero
= 1;
108 /* Argument pointers cannot point to anything but their argument. */
109 flag_argument_noalias
= 3;
113 set_default_std_flags ();
115 gfc_option
.warn_nonstd_intrinsics
= 0;
117 /* -fshort-enums can be default on some targets. */
118 gfc_option
.fshort_enums
= targetm
.default_short_enums ();
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
;
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 /* Verify the input file name. */
204 if (!filename
|| strcmp (filename
, "-") == 0)
209 if (gfc_option
.flag_preprocessed
)
211 /* For preprocessed files, if the first tokens are of the form # NUM.
212 handle the directives so we know the original file name. */
213 gfc_source_file
= gfc_read_orig_filename (filename
, &canon_source_file
);
214 if (gfc_source_file
== NULL
)
215 gfc_source_file
= filename
;
217 *pfilename
= gfc_source_file
;
220 gfc_source_file
= filename
;
222 if (canon_source_file
== NULL
)
223 canon_source_file
= gfc_source_file
;
225 /* Adds the path where the source file is to the list of include files. */
227 i
= strlen (canon_source_file
);
228 while (i
> 0 && !IS_DIR_SEPARATOR (canon_source_file
[i
]))
233 source_path
= alloca (i
+ 1);
234 memcpy (source_path
, canon_source_file
, i
);
236 gfc_add_include_path (source_path
, true);
239 gfc_add_include_path (".", true);
241 if (canon_source_file
!= gfc_source_file
)
242 gfc_free (CONST_CAST (canon_source_file
));
244 /* Decide which form the file will be read in as. */
246 if (gfc_option
.source_form
!= FORM_UNKNOWN
)
247 gfc_current_form
= gfc_option
.source_form
;
250 gfc_current_form
= form_from_filename (filename
);
252 if (gfc_current_form
== FORM_UNKNOWN
)
254 gfc_current_form
= FORM_FREE
;
255 gfc_warning_now ("Reading file '%s' as free form",
256 (filename
[0] == '\0') ? "<stdin>" : filename
);
260 /* If the user specified -fd-lines-as-{code|comments} verify that we're
262 if (gfc_current_form
== FORM_FREE
)
264 if (gfc_option
.flag_d_lines
== 0)
265 gfc_warning_now ("'-fd-lines-as-comments' has no effect "
267 else if (gfc_option
.flag_d_lines
== 1)
268 gfc_warning_now ("'-fd-lines-as-code' has no effect in free form");
271 flag_inline_trees
= 1;
273 /* Use tree inlining. */
276 if (flag_inline_functions
)
277 flag_inline_trees
= 2;
279 /* If -pedantic, warn about the use of GNU extensions. */
280 if (pedantic
&& (gfc_option
.allow_std
& GFC_STD_GNU
) != 0)
281 gfc_option
.warn_std
|= GFC_STD_GNU
;
282 /* -std=legacy -pedantic is effectively -std=gnu. */
283 if (pedantic
&& (gfc_option
.allow_std
& GFC_STD_LEGACY
) != 0)
284 gfc_option
.warn_std
|= GFC_STD_F95_OBS
| GFC_STD_F95_DEL
| GFC_STD_LEGACY
;
286 /* If the user didn't explicitly specify -f(no)-second-underscore we
287 use it if we're trying to be compatible with f2c, and not
289 if (gfc_option
.flag_second_underscore
== -1)
290 gfc_option
.flag_second_underscore
= gfc_option
.flag_f2c
;
292 /* Implement -fno-automatic as -fmax-stack-var-size=0. */
293 if (!gfc_option
.flag_automatic
)
294 gfc_option
.flag_max_stack_var_size
= 0;
298 gfc_option
.warn_ampersand
= 1;
299 gfc_option
.warn_tabs
= 0;
302 if (gfc_option
.flag_all_intrinsics
)
303 gfc_option
.warn_nonstd_intrinsics
= 0;
309 /* Set the options for -Wall. */
312 set_Wall (int setting
)
314 gfc_option
.warn_aliasing
= setting
;
315 gfc_option
.warn_ampersand
= setting
;
316 gfc_option
.warn_line_truncation
= setting
;
317 gfc_option
.warn_nonstd_intrinsics
= setting
;
318 gfc_option
.warn_surprising
= setting
;
319 gfc_option
.warn_tabs
= !setting
;
320 gfc_option
.warn_underflow
= setting
;
321 gfc_option
.warn_character_truncation
= setting
;
323 set_Wunused (setting
);
324 warn_return_type
= setting
;
325 warn_switch
= setting
;
327 /* We save the value of warn_uninitialized, since if they put
328 -Wuninitialized on the command line, we need to generate a
329 warning about not using it without also specifying -O. */
331 warn_uninitialized
= 0;
332 else if (warn_uninitialized
!= 1)
333 warn_uninitialized
= 2;
338 gfc_handle_module_path_options (const char *arg
)
341 if (gfc_option
.module_dir
!= NULL
)
343 gfc_status ("gfortran: Only one -M option allowed\n");
349 gfc_status ("gfortran: Directory required after -M\n");
353 gfc_option
.module_dir
= (char *) gfc_getmem (strlen (arg
) + 2);
354 strcpy (gfc_option
.module_dir
, arg
);
355 strcat (gfc_option
.module_dir
, "/");
357 gfc_add_include_path (gfc_option
.module_dir
, true);
362 gfc_handle_fpe_trap_option (const char *arg
)
364 int result
, pos
= 0, n
;
365 static const char * const exception
[] = { "invalid", "denormal", "zero",
366 "overflow", "underflow",
368 static const int opt_exception
[] = { GFC_FPE_INVALID
, GFC_FPE_DENORMAL
,
369 GFC_FPE_ZERO
, GFC_FPE_OVERFLOW
,
370 GFC_FPE_UNDERFLOW
, GFC_FPE_PRECISION
,
378 while (arg
[pos
] && arg
[pos
] != ',')
382 for (n
= 0; exception
[n
] != NULL
; n
++)
384 if (exception
[n
] && strncmp (exception
[n
], arg
, pos
) == 0)
386 gfc_option
.fpe
|= opt_exception
[n
];
394 gfc_fatal_error ("Argument to -ffpe-trap is not valid: %s", arg
);
399 /* Handle command-line options. Returns 0 if unrecognized, 1 if
400 recognized and handled. */
403 gfc_handle_option (size_t scode
, const char *arg
, int value
)
406 enum opt_code code
= (enum opt_code
) scode
;
408 /* Ignore file names. */
423 gfc_option
.warn_aliasing
= value
;
427 gfc_option
.warn_ampersand
= value
;
430 case OPT_Wcharacter_truncation
:
431 gfc_option
.warn_character_truncation
= value
;
434 case OPT_Wconversion
:
435 gfc_option
.warn_conversion
= value
;
438 case OPT_Wimplicit_interface
:
439 gfc_option
.warn_implicit_interface
= value
;
442 case OPT_Wline_truncation
:
443 gfc_option
.warn_line_truncation
= value
;
446 case OPT_Wsurprising
:
447 gfc_option
.warn_surprising
= value
;
451 gfc_option
.warn_tabs
= value
;
455 gfc_option
.warn_underflow
= value
;
458 case OPT_fall_intrinsics
:
459 gfc_option
.flag_all_intrinsics
= 1;
463 gfc_option
.flag_automatic
= value
;
466 case OPT_fallow_leading_underscore
:
467 gfc_option
.flag_allow_leading_underscore
= value
;
471 gfc_option
.flag_backslash
= value
;
475 gfc_option
.flag_backtrace
= value
;
479 gfc_option
.flag_dump_core
= value
;
482 case OPT_fcray_pointer
:
483 gfc_option
.flag_cray_pointer
= value
;
487 gfc_option
.flag_f2c
= value
;
491 gfc_option
.flag_dollar_ok
= value
;
494 case OPT_fexternal_blas
:
495 gfc_option
.flag_external_blas
= value
;
498 case OPT_fblas_matmul_limit_
:
499 gfc_option
.blas_matmul_limit
= value
;
502 case OPT_fd_lines_as_code
:
503 gfc_option
.flag_d_lines
= 1;
506 case OPT_fd_lines_as_comments
:
507 gfc_option
.flag_d_lines
= 0;
510 case OPT_fdump_parse_tree
:
511 gfc_option
.verbose
= value
;
514 case OPT_ffixed_form
:
515 gfc_option
.source_form
= FORM_FIXED
;
518 case OPT_ffixed_line_length_none
:
519 gfc_option
.fixed_line_length
= 0;
522 case OPT_ffixed_line_length_
:
523 if (value
!= 0 && value
< 7)
524 gfc_fatal_error ("Fixed line length must be at least seven.");
525 gfc_option
.fixed_line_length
= value
;
529 gfc_option
.source_form
= FORM_FREE
;
533 gfc_option
.flag_openmp
= value
;
536 case OPT_ffree_line_length_none
:
537 gfc_option
.free_line_length
= 0;
540 case OPT_ffree_line_length_
:
541 if (value
!= 0 && value
< 4)
542 gfc_fatal_error ("Free line length must be at least three.");
543 gfc_option
.free_line_length
= value
;
546 case OPT_funderscoring
:
547 gfc_option
.flag_underscoring
= value
;
550 case OPT_fsecond_underscore
:
551 gfc_option
.flag_second_underscore
= value
;
554 case OPT_static_libgfortran
:
555 #ifndef HAVE_LD_STATIC_DYNAMIC
556 gfc_fatal_error ("-static-libgfortran is not supported in this "
561 case OPT_fimplicit_none
:
562 gfc_option
.flag_implicit_none
= value
;
565 case OPT_fintrinsic_modules_path
:
566 gfc_add_include_path (arg
, false);
567 gfc_add_intrinsic_modules_path (arg
);
570 case OPT_fmax_errors_
:
571 gfc_option
.max_errors
= value
;
574 case OPT_fmax_stack_var_size_
:
575 gfc_option
.flag_max_stack_var_size
= value
;
578 case OPT_frange_check
:
579 gfc_option
.flag_range_check
= value
;
582 case OPT_fpack_derived
:
583 gfc_option
.flag_pack_derived
= value
;
586 case OPT_frepack_arrays
:
587 gfc_option
.flag_repack_arrays
= value
;
590 case OPT_fpreprocessed
:
591 gfc_option
.flag_preprocessed
= value
;
594 case OPT_fmax_identifier_length_
:
595 if (value
> GFC_MAX_SYMBOL_LEN
)
596 gfc_fatal_error ("Maximum supported identifier length is %d",
598 gfc_option
.max_identifier_length
= value
;
601 case OPT_fdefault_integer_8
:
602 gfc_option
.flag_default_integer
= value
;
605 case OPT_fdefault_real_8
:
606 gfc_option
.flag_default_real
= value
;
609 case OPT_fdefault_double_8
:
610 gfc_option
.flag_default_double
= value
;
614 gfc_add_include_path (arg
, true);
619 gfc_handle_module_path_options (arg
);
623 gfc_option
.flag_sign_zero
= value
;
627 gfc_handle_fpe_trap_option (arg
);
631 gfc_option
.allow_std
= GFC_STD_F95_OBS
| GFC_STD_F95
| GFC_STD_F77
;
632 gfc_option
.warn_std
= GFC_STD_F95_OBS
;
633 gfc_option
.max_identifier_length
= 31;
634 gfc_option
.warn_ampersand
= 1;
635 gfc_option
.warn_tabs
= 0;
639 gfc_option
.allow_std
= GFC_STD_F95_OBS
| GFC_STD_F77
640 | GFC_STD_F2003
| GFC_STD_F95
;
641 gfc_option
.warn_std
= GFC_STD_F95_OBS
;
642 gfc_option
.max_continue_fixed
= 255;
643 gfc_option
.max_continue_free
= 255;
644 gfc_option
.max_identifier_length
= 63;
645 gfc_option
.warn_ampersand
= 1;
646 gfc_option
.warn_tabs
= 0;
650 set_default_std_flags ();
654 set_default_std_flags ();
655 gfc_option
.warn_std
= 0;
658 case OPT_Wnonstd_intrinsics
:
659 gfc_option
.warn_nonstd_intrinsics
= value
;
662 case OPT_fshort_enums
:
663 gfc_option
.fshort_enums
= 1;
666 case OPT_fconvert_little_endian
:
667 gfc_option
.convert
= CONVERT_LITTLE
;
670 case OPT_fconvert_big_endian
:
671 gfc_option
.convert
= CONVERT_BIG
;
674 case OPT_fconvert_native
:
675 gfc_option
.convert
= CONVERT_NATIVE
;
678 case OPT_fconvert_swap
:
679 gfc_option
.convert
= CONVERT_SWAP
;
682 case OPT_frecord_marker_4
:
683 gfc_option
.record_marker
= 4;
686 case OPT_frecord_marker_8
:
687 gfc_option
.record_marker
= 8;
690 case OPT_fmax_subrecord_length_
:
691 if (value
> MAX_SUBRECORD_LENGTH
)
692 gfc_fatal_error ("Maximum subrecord length cannot exceed %d",
693 MAX_SUBRECORD_LENGTH
);
695 gfc_option
.max_subrecord_length
= value
;