1 /* Parse and display command line options.
2 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006
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 2, 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 COPYING. If not, write to the Free
20 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
26 #include "coretypes.h"
32 #include "tree-inline.h"
37 gfc_option_t gfc_option
;
40 /* Get ready for options handling. */
43 gfc_init_options (unsigned int argc ATTRIBUTE_UNUSED
,
44 const char **argv ATTRIBUTE_UNUSED
)
46 gfc_source_file
= NULL
;
47 gfc_option
.module_dir
= NULL
;
48 gfc_option
.source_form
= FORM_UNKNOWN
;
49 gfc_option
.fixed_line_length
= -1;
50 gfc_option
.free_line_length
= -1;
51 gfc_option
.max_identifier_length
= GFC_MAX_SYMBOL_LEN
;
52 gfc_option
.verbose
= 0;
54 gfc_option
.warn_aliasing
= 0;
55 gfc_option
.warn_ampersand
= 0;
56 gfc_option
.warn_conversion
= 0;
57 gfc_option
.warn_implicit_interface
= 0;
58 gfc_option
.warn_line_truncation
= 0;
59 gfc_option
.warn_surprising
= 0;
60 gfc_option
.warn_tabs
= 1;
61 gfc_option
.warn_underflow
= 1;
62 gfc_option
.warn_unused_labels
= 0;
64 gfc_option
.flag_all_intrinsics
= 0;
65 gfc_option
.flag_default_double
= 0;
66 gfc_option
.flag_default_integer
= 0;
67 gfc_option
.flag_default_real
= 0;
68 gfc_option
.flag_dollar_ok
= 0;
69 gfc_option
.flag_underscoring
= 1;
70 gfc_option
.flag_f2c
= 0;
71 gfc_option
.flag_second_underscore
= -1;
72 gfc_option
.flag_implicit_none
= 0;
73 gfc_option
.flag_max_stack_var_size
= 32768;
74 gfc_option
.flag_module_access_private
= 0;
75 gfc_option
.flag_no_backend
= 0;
76 gfc_option
.flag_range_check
= 1;
77 gfc_option
.flag_pack_derived
= 0;
78 gfc_option
.flag_repack_arrays
= 0;
79 gfc_option
.flag_preprocessed
= 0;
80 gfc_option
.flag_automatic
= 1;
81 gfc_option
.flag_backslash
= 1;
82 gfc_option
.flag_cray_pointer
= 0;
83 gfc_option
.flag_d_lines
= -1;
84 gfc_option
.flag_openmp
= 0;
86 gfc_option
.q_kind
= gfc_default_double_kind
;
90 /* Argument pointers cannot point to anything
91 but their argument. */
92 flag_argument_noalias
= 3;
96 gfc_option
.allow_std
= GFC_STD_F95_OBS
| GFC_STD_F95_DEL
97 | GFC_STD_F2003
| GFC_STD_F95
| GFC_STD_F77
| GFC_STD_GNU
99 gfc_option
.warn_std
= GFC_STD_F95_OBS
| GFC_STD_F95_DEL
102 gfc_option
.warn_nonstd_intrinsics
= 0;
104 /* -fshort-enums can be default on some targets. */
105 gfc_option
.fshort_enums
= targetm
.default_short_enums ();
111 /* Determine the source form from the filename extension. We assume
112 case insensitivity. */
114 static gfc_source_form
115 form_from_filename (const char *filename
)
120 const char *extension
;
121 gfc_source_form form
;
139 }; /* sentinel value */
141 gfc_source_form f_form
;
145 /* Find end of file name. Note, filename is either a NULL pointer or
146 a NUL terminated string. */
148 while (filename
[i
] != '\0')
151 /* Find last period. */
152 while (i
>= 0 && (filename
[i
] != '.'))
155 /* Did we see a file extension? */
157 return FORM_UNKNOWN
; /* Nope */
159 /* Get file extension and compare it to others. */
160 fileext
= &(filename
[i
]);
163 f_form
= FORM_UNKNOWN
;
167 if (strcasecmp (fileext
, exttype
[i
].extension
) == 0)
169 f_form
= exttype
[i
].form
;
173 while (exttype
[i
].form
!= FORM_UNKNOWN
);
179 /* Finalize commandline options. */
182 gfc_post_options (const char **pfilename
)
184 const char *filename
= *pfilename
, *canon_source_file
= NULL
;
188 /* Verify the input file name. */
189 if (!filename
|| strcmp (filename
, "-") == 0)
194 if (gfc_option
.flag_preprocessed
)
196 /* For preprocessed files, if the first tokens are of the form # NUM.
197 handle the directives so we know the original file name. */
198 gfc_source_file
= gfc_read_orig_filename (filename
, &canon_source_file
);
199 if (gfc_source_file
== NULL
)
200 gfc_source_file
= filename
;
202 *pfilename
= gfc_source_file
;
205 gfc_source_file
= filename
;
207 if (canon_source_file
== NULL
)
208 canon_source_file
= gfc_source_file
;
210 /* Adds the path where the source file is to the list of include files. */
212 i
= strlen (canon_source_file
);
213 while (i
> 0 && !IS_DIR_SEPARATOR (canon_source_file
[i
]))
217 source_path
= alloca (i
+ 1);
218 memcpy (source_path
, canon_source_file
, i
);
220 gfc_add_include_path (source_path
);
223 gfc_add_include_path (".");
225 if (canon_source_file
!= gfc_source_file
)
226 gfc_free ((void *) canon_source_file
);
228 /* Decide which form the file will be read in as. */
230 if (gfc_option
.source_form
!= FORM_UNKNOWN
)
231 gfc_current_form
= gfc_option
.source_form
;
234 gfc_current_form
= form_from_filename (filename
);
236 if (gfc_current_form
== FORM_UNKNOWN
)
238 gfc_current_form
= FORM_FREE
;
239 gfc_warning_now ("Reading file '%s' as free form.",
240 (filename
[0] == '\0') ? "<stdin>" : filename
);
244 /* If the user specified -fd-lines-as-{code|comments} verify that we're
246 if (gfc_current_form
== FORM_FREE
)
248 if (gfc_option
.flag_d_lines
== 0)
249 gfc_warning_now ("'-fd-lines-as-comments' has no effect "
251 else if (gfc_option
.flag_d_lines
== 1)
252 gfc_warning_now ("'-fd-lines-as-code' has no effect "
256 flag_inline_trees
= 1;
258 /* Use tree inlining. */
261 if (flag_inline_functions
)
262 flag_inline_trees
= 2;
264 /* If -pedantic, warn about the use of GNU extensions. */
265 if (pedantic
&& (gfc_option
.allow_std
& GFC_STD_GNU
) != 0)
266 gfc_option
.warn_std
|= GFC_STD_GNU
;
267 /* -std=legacy -pedantic is effectively -std=gnu. */
268 if (pedantic
&& (gfc_option
.allow_std
& GFC_STD_LEGACY
) != 0)
269 gfc_option
.warn_std
|= GFC_STD_F95_OBS
| GFC_STD_F95_DEL
| GFC_STD_LEGACY
;
271 /* If the user didn't explicitly specify -f(no)-second-underscore we
272 use it if we're trying to be compatible with f2c, and not
274 if (gfc_option
.flag_second_underscore
== -1)
275 gfc_option
.flag_second_underscore
= gfc_option
.flag_f2c
;
277 /* Implement -fno-automatic as -fmax-stack-var-size=0. */
278 if (!gfc_option
.flag_automatic
)
279 gfc_option
.flag_max_stack_var_size
= 0;
282 gfc_option
.warn_ampersand
= 1;
284 if (gfc_option
.flag_all_intrinsics
)
285 gfc_option
.warn_nonstd_intrinsics
= 0;
291 /* Set the options for -Wall. */
297 gfc_option
.warn_aliasing
= 1;
298 gfc_option
.warn_ampersand
= 1;
299 gfc_option
.warn_line_truncation
= 1;
300 gfc_option
.warn_nonstd_intrinsics
= 1;
301 gfc_option
.warn_surprising
= 1;
302 gfc_option
.warn_tabs
= 0;
303 gfc_option
.warn_underflow
= 1;
304 gfc_option
.warn_unused_labels
= 1;
307 warn_return_type
= 1;
310 /* We save the value of warn_uninitialized, since if they put
311 -Wuninitialized on the command line, we need to generate a
312 warning about not using it without also specifying -O. */
314 if (warn_uninitialized
!= 1)
315 warn_uninitialized
= 2;
320 gfc_handle_module_path_options (const char *arg
)
323 if (gfc_option
.module_dir
!= NULL
)
325 gfc_status ("gfortran: Only one -M option allowed\n");
331 gfc_status ("gfortran: Directory required after -M\n");
335 gfc_option
.module_dir
= (char *) gfc_getmem (strlen (arg
) + 2);
336 strcpy (gfc_option
.module_dir
, arg
);
337 strcat (gfc_option
.module_dir
, "/");
341 gfc_handle_fpe_trap_option (const char *arg
)
343 int result
, pos
= 0, n
;
344 static const char * const exception
[] = { "invalid", "denormal", "zero",
345 "overflow", "underflow",
347 static const int opt_exception
[] = { GFC_FPE_INVALID
, GFC_FPE_DENORMAL
,
348 GFC_FPE_ZERO
, GFC_FPE_OVERFLOW
,
349 GFC_FPE_UNDERFLOW
, GFC_FPE_PRECISION
,
356 while (arg
[pos
] && arg
[pos
] != ',')
359 for (n
= 0; exception
[n
] != NULL
; n
++)
361 if (exception
[n
] && strncmp (exception
[n
], arg
, pos
) == 0)
363 gfc_option
.fpe
|= opt_exception
[n
];
371 gfc_fatal_error ("Argument to -ffpe-trap is not valid: %s", arg
);
375 /* Handle command-line options. Returns 0 if unrecognized, 1 if
376 recognized and handled. */
378 gfc_handle_option (size_t scode
, const char *arg
, int value
)
381 enum opt_code code
= (enum opt_code
) scode
;
383 /* Ignore file names. */
398 gfc_option
.warn_aliasing
= value
;
402 gfc_option
.warn_ampersand
= value
;
405 case OPT_Wconversion
:
406 gfc_option
.warn_conversion
= value
;
409 case OPT_Wimplicit_interface
:
410 gfc_option
.warn_implicit_interface
= value
;
413 case OPT_Wline_truncation
:
414 gfc_option
.warn_line_truncation
= value
;
417 case OPT_Wsurprising
:
418 gfc_option
.warn_surprising
= value
;
422 gfc_option
.warn_tabs
= value
;
426 gfc_option
.warn_underflow
= value
;
429 case OPT_Wunused_labels
:
430 gfc_option
.warn_unused_labels
= value
;
433 case OPT_fall_intrinsics
:
434 gfc_option
.flag_all_intrinsics
= 1;
438 gfc_option
.flag_automatic
= value
;
442 gfc_option
.flag_backslash
= value
;
445 case OPT_fcray_pointer
:
446 gfc_option
.flag_cray_pointer
= value
;
450 gfc_option
.flag_f2c
= value
;
454 gfc_option
.flag_dollar_ok
= value
;
457 case OPT_fd_lines_as_code
:
458 gfc_option
.flag_d_lines
= 1;
461 case OPT_fd_lines_as_comments
:
462 gfc_option
.flag_d_lines
= 0;
465 case OPT_fdump_parse_tree
:
466 gfc_option
.verbose
= value
;
469 case OPT_ffixed_form
:
470 gfc_option
.source_form
= FORM_FIXED
;
473 case OPT_ffixed_line_length_none
:
474 gfc_option
.fixed_line_length
= 0;
477 case OPT_ffixed_line_length_
:
478 if (value
!= 0 && value
< 7)
479 gfc_fatal_error ("Fixed line length must be at least seven.");
480 gfc_option
.fixed_line_length
= value
;
484 gfc_option
.source_form
= FORM_FREE
;
488 gfc_option
.flag_openmp
= value
;
491 case OPT_ffree_line_length_none
:
492 gfc_option
.free_line_length
= 0;
495 case OPT_ffree_line_length_
:
496 gfc_option
.free_line_length
= value
;
499 case OPT_funderscoring
:
500 gfc_option
.flag_underscoring
= value
;
503 case OPT_fsecond_underscore
:
504 gfc_option
.flag_second_underscore
= value
;
507 case OPT_fimplicit_none
:
508 gfc_option
.flag_implicit_none
= value
;
511 case OPT_fmax_stack_var_size_
:
512 gfc_option
.flag_max_stack_var_size
= value
;
515 case OPT_fmodule_private
:
516 gfc_option
.flag_module_access_private
= value
;
519 case OPT_fno_backend
:
520 gfc_option
.flag_no_backend
= value
;
523 case OPT_frange_check
:
524 gfc_option
.flag_range_check
= value
;
527 case OPT_fpack_derived
:
528 gfc_option
.flag_pack_derived
= value
;
531 case OPT_frepack_arrays
:
532 gfc_option
.flag_repack_arrays
= value
;
535 case OPT_fpreprocessed
:
536 gfc_option
.flag_preprocessed
= value
;
539 case OPT_fmax_identifier_length_
:
540 if (value
> GFC_MAX_SYMBOL_LEN
)
541 gfc_fatal_error ("Maximum supported identifier length is %d",
543 gfc_option
.max_identifier_length
= value
;
547 if (gfc_validate_kind (BT_REAL
, value
, true) < 0)
548 gfc_fatal_error ("Argument to -fqkind isn't a valid real kind");
549 gfc_option
.q_kind
= value
;
552 case OPT_fdefault_integer_8
:
553 gfc_option
.flag_default_integer
= value
;
556 case OPT_fdefault_real_8
:
557 gfc_option
.flag_default_real
= value
;
560 case OPT_fdefault_double_8
:
561 gfc_option
.flag_default_double
= value
;
565 gfc_add_include_path (arg
);
570 gfc_handle_module_path_options (arg
);
574 gfc_handle_fpe_trap_option (arg
);
578 gfc_option
.allow_std
= GFC_STD_F95_OBS
| GFC_STD_F95
| GFC_STD_F77
;
579 gfc_option
.warn_std
= GFC_STD_F95_OBS
;
580 gfc_option
.max_identifier_length
= 31;
581 gfc_option
.warn_ampersand
= 1;
582 gfc_option
.warn_tabs
= 0;
586 gfc_option
.allow_std
= GFC_STD_F95_OBS
| GFC_STD_F77
587 | GFC_STD_F2003
| GFC_STD_F95
;
588 gfc_option
.warn_std
= GFC_STD_F95_OBS
;
589 gfc_option
.max_identifier_length
= 63;
590 gfc_option
.warn_ampersand
= 1;
594 gfc_option
.allow_std
= GFC_STD_F95_OBS
| GFC_STD_F95_DEL
595 | GFC_STD_F77
| GFC_STD_F95
| GFC_STD_F2003
596 | GFC_STD_GNU
| GFC_STD_LEGACY
;
597 gfc_option
.warn_std
= GFC_STD_F95_OBS
| GFC_STD_F95_DEL
602 gfc_option
.allow_std
= GFC_STD_F95_OBS
| GFC_STD_F95_DEL
603 | GFC_STD_F77
| GFC_STD_F95
| GFC_STD_F2003
604 | GFC_STD_GNU
| GFC_STD_LEGACY
;
605 gfc_option
.warn_std
= 0;
608 case OPT_Wnonstd_intrinsics
:
609 gfc_option
.warn_nonstd_intrinsics
= value
;
612 case OPT_fshort_enums
:
613 gfc_option
.fshort_enums
= 1;
616 case OPT_fconvert_little_endian
:
617 gfc_option
.convert
= CONVERT_LITTLE
;
620 case OPT_fconvert_big_endian
:
621 gfc_option
.convert
= CONVERT_BIG
;
624 case OPT_fconvert_native
:
625 gfc_option
.convert
= CONVERT_NATIVE
;
628 case OPT_fconvert_swap
:
629 gfc_option
.convert
= CONVERT_SWAP
;
632 case OPT_frecord_marker_4
:
633 gfc_option
.record_marker
= 4;
636 case OPT_frecord_marker_8
:
637 gfc_option
.record_marker
= 8;