1 /* Parse and display command line options.
2 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation,
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_conversion
= 0;
56 gfc_option
.warn_implicit_interface
= 0;
57 gfc_option
.warn_line_truncation
= 0;
58 gfc_option
.warn_underflow
= 1;
59 gfc_option
.warn_surprising
= 0;
60 gfc_option
.warn_unused_labels
= 0;
62 gfc_option
.flag_default_double
= 0;
63 gfc_option
.flag_default_integer
= 0;
64 gfc_option
.flag_default_real
= 0;
65 gfc_option
.flag_dollar_ok
= 0;
66 gfc_option
.flag_underscoring
= 1;
67 gfc_option
.flag_f2c
= 0;
68 gfc_option
.flag_second_underscore
= -1;
69 gfc_option
.flag_implicit_none
= 0;
70 gfc_option
.flag_max_stack_var_size
= 32768;
71 gfc_option
.flag_module_access_private
= 0;
72 gfc_option
.flag_no_backend
= 0;
73 gfc_option
.flag_pack_derived
= 0;
74 gfc_option
.flag_repack_arrays
= 0;
75 gfc_option
.flag_automatic
= 1;
76 gfc_option
.flag_backslash
= 1;
77 gfc_option
.flag_cray_pointer
= 0;
78 gfc_option
.flag_d_lines
= -1;
80 gfc_option
.q_kind
= gfc_default_double_kind
;
84 flag_argument_noalias
= 2;
87 gfc_option
.allow_std
= GFC_STD_F95_OBS
| GFC_STD_F95_DEL
88 | GFC_STD_F2003
| GFC_STD_F95
| GFC_STD_F77
| GFC_STD_GNU
90 gfc_option
.warn_std
= GFC_STD_F95_OBS
| GFC_STD_F95_DEL
91 | GFC_STD_F2003
| GFC_STD_LEGACY
;
93 gfc_option
.warn_nonstd_intrinsics
= 0;
95 /* -fshort-enums can be default on some targets. */
96 gfc_option
.fshort_enums
= targetm
.default_short_enums ();
102 /* Determine the source form from the filename extension. We assume
103 case insensitivity. */
105 static gfc_source_form
106 form_from_filename (const char *filename
)
111 const char *extension
;
112 gfc_source_form form
;
130 }; /* sentinel value */
132 gfc_source_form f_form
;
136 /* Find end of file name. Note, filename is either a NULL pointer or
137 a NUL terminated string. */
139 while (filename
[i
] != '\0')
142 /* Find last period. */
143 while (i
>= 0 && (filename
[i
] != '.'))
146 /* Did we see a file extension? */
148 return FORM_UNKNOWN
; /* Nope */
150 /* Get file extension and compare it to others. */
151 fileext
= &(filename
[i
]);
154 f_form
= FORM_UNKNOWN
;
158 if (strcasecmp (fileext
, exttype
[i
].extension
) == 0)
160 f_form
= exttype
[i
].form
;
164 while (exttype
[i
].form
!= FORM_UNKNOWN
);
170 /* Finalize commandline options. */
173 gfc_post_options (const char **pfilename
)
175 const char *filename
= *pfilename
;
179 /* Verify the input file name. */
180 if (!filename
|| strcmp (filename
, "-") == 0)
185 gfc_source_file
= filename
;
187 /* Adds the path where the source file is to the list of include files. */
189 i
= strlen(gfc_source_file
);
190 while (i
> 0 && !IS_DIR_SEPARATOR(gfc_source_file
[i
]))
194 source_path
= alloca (i
+ 1);
195 memcpy (source_path
, gfc_source_file
, i
);
197 gfc_add_include_path (source_path
);
200 gfc_add_include_path (".");
202 /* Decide which form the file will be read in as. */
204 if (gfc_option
.source_form
!= FORM_UNKNOWN
)
205 gfc_current_form
= gfc_option
.source_form
;
208 gfc_current_form
= form_from_filename (filename
);
210 if (gfc_current_form
== FORM_UNKNOWN
)
212 gfc_current_form
= FORM_FREE
;
213 gfc_warning_now ("Reading file '%s' as free form.",
214 (filename
[0] == '\0') ? "<stdin>" : filename
);
218 /* If the user specified -fd-lines-as-{code|comments} verify that we're
220 if (gfc_current_form
== FORM_FREE
)
222 if (gfc_option
.flag_d_lines
== 0)
223 gfc_warning_now ("'-fd-lines-as-comments' has no effect "
225 else if (gfc_option
.flag_d_lines
== 1)
226 gfc_warning_now ("'-fd-lines-as-code' has no effect "
230 flag_inline_trees
= 1;
232 /* Use tree inlining. */
235 if (flag_inline_functions
)
236 flag_inline_trees
= 2;
238 /* If -pedantic, warn about the use of GNU extensions. */
239 if (pedantic
&& (gfc_option
.allow_std
& GFC_STD_GNU
) != 0)
240 gfc_option
.warn_std
|= GFC_STD_GNU
;
241 /* -std=legacy -pedantic is effectively -std=gnu. */
242 if (pedantic
&& (gfc_option
.allow_std
& GFC_STD_LEGACY
) != 0)
243 gfc_option
.warn_std
|= GFC_STD_F95_OBS
| GFC_STD_F95_DEL
| GFC_STD_LEGACY
;
245 /* If the user didn't explicitly specify -f(no)-second-underscore we
246 use it if we're trying to be compatible with f2c, and not
248 if (gfc_option
.flag_second_underscore
== -1)
249 gfc_option
.flag_second_underscore
= gfc_option
.flag_f2c
;
251 /* Implement -fno-automatic as -fmax-stack-var-size=0. */
252 if (!gfc_option
.flag_automatic
)
253 gfc_option
.flag_max_stack_var_size
= 0;
259 /* Set the options for -Wall. */
265 gfc_option
.warn_aliasing
= 1;
266 gfc_option
.warn_line_truncation
= 1;
267 gfc_option
.warn_underflow
= 1;
268 gfc_option
.warn_surprising
= 1;
269 gfc_option
.warn_unused_labels
= 1;
270 gfc_option
.warn_nonstd_intrinsics
= 1;
273 warn_return_type
= 1;
276 /* We save the value of warn_uninitialized, since if they put
277 -Wuninitialized on the command line, we need to generate a
278 warning about not using it without also specifying -O. */
280 if (warn_uninitialized
!= 1)
281 warn_uninitialized
= 2;
286 gfc_handle_module_path_options (const char *arg
)
289 if (gfc_option
.module_dir
!= NULL
)
291 gfc_status ("gfortran: Only one -M option allowed\n");
297 gfc_status ("gfortran: Directory required after -M\n");
301 gfc_option
.module_dir
= (char *) gfc_getmem (strlen (arg
) + 2);
302 strcpy (gfc_option
.module_dir
, arg
);
303 strcat (gfc_option
.module_dir
, "/");
307 gfc_handle_fpe_trap_option (const char *arg
)
309 int result
, pos
= 0, n
;
310 static const char * const exception
[] = { "invalid", "denormal", "zero",
311 "overflow", "underflow",
313 static const int opt_exception
[] = { GFC_FPE_INVALID
, GFC_FPE_DENORMAL
,
314 GFC_FPE_ZERO
, GFC_FPE_OVERFLOW
,
315 GFC_FPE_UNDERFLOW
, GFC_FPE_PRECISION
,
322 while (arg
[pos
] && arg
[pos
] != ',')
325 for (n
= 0; exception
[n
] != NULL
; n
++)
327 if (exception
[n
] && strncmp (exception
[n
], arg
, pos
) == 0)
329 gfc_option
.fpe
|= opt_exception
[n
];
337 gfc_fatal_error ("Argument to -ffpe-trap is not valid: %s", arg
);
341 /* Handle command-line options. Returns 0 if unrecognized, 1 if
342 recognized and handled. */
344 gfc_handle_option (size_t scode
, const char *arg
, int value
)
347 enum opt_code code
= (enum opt_code
) scode
;
349 /* Ignore file names. */
364 gfc_option
.warn_aliasing
= value
;
367 case OPT_Wconversion
:
368 gfc_option
.warn_conversion
= value
;
371 case OPT_Wimplicit_interface
:
372 gfc_option
.warn_implicit_interface
= value
;
375 case OPT_Wline_truncation
:
376 gfc_option
.warn_line_truncation
= value
;
380 gfc_option
.warn_underflow
= value
;
383 case OPT_Wsurprising
:
384 gfc_option
.warn_surprising
= value
;
387 case OPT_Wunused_labels
:
388 gfc_option
.warn_unused_labels
= value
;
391 case OPT_fcray_pointer
:
392 gfc_option
.flag_cray_pointer
= value
;
396 gfc_option
.flag_f2c
= value
;
400 gfc_option
.flag_dollar_ok
= value
;
404 gfc_option
.flag_automatic
= value
;
408 gfc_option
.flag_backslash
= value
;
411 case OPT_fd_lines_as_code
:
412 gfc_option
.flag_d_lines
= 1;
415 case OPT_fd_lines_as_comments
:
416 gfc_option
.flag_d_lines
= 0;
419 case OPT_fdump_parse_tree
:
420 gfc_option
.verbose
= value
;
423 case OPT_ffixed_form
:
424 gfc_option
.source_form
= FORM_FIXED
;
427 case OPT_ffixed_line_length_none
:
428 gfc_option
.fixed_line_length
= 0;
431 case OPT_ffixed_line_length_
:
432 if (value
!= 0 && value
< 7)
433 gfc_fatal_error ("Fixed line length must be at least seven.");
434 gfc_option
.fixed_line_length
= value
;
438 gfc_option
.source_form
= FORM_FREE
;
441 case OPT_ffree_line_length_none
:
442 gfc_option
.free_line_length
= 0;
445 case OPT_ffree_line_length_
:
446 gfc_option
.free_line_length
= value
;
449 case OPT_funderscoring
:
450 gfc_option
.flag_underscoring
= value
;
453 case OPT_fsecond_underscore
:
454 gfc_option
.flag_second_underscore
= value
;
457 case OPT_fimplicit_none
:
458 gfc_option
.flag_implicit_none
= value
;
461 case OPT_fmax_stack_var_size_
:
462 gfc_option
.flag_max_stack_var_size
= value
;
465 case OPT_fmodule_private
:
466 gfc_option
.flag_module_access_private
= value
;
469 case OPT_fno_backend
:
470 gfc_option
.flag_no_backend
= value
;
473 case OPT_fpack_derived
:
474 gfc_option
.flag_pack_derived
= value
;
477 case OPT_frepack_arrays
:
478 gfc_option
.flag_repack_arrays
= value
;
481 case OPT_fmax_identifier_length_
:
482 if (value
> GFC_MAX_SYMBOL_LEN
)
483 gfc_fatal_error ("Maximum supported idenitifier length is %d",
485 gfc_option
.max_identifier_length
= value
;
489 if (gfc_validate_kind (BT_REAL
, value
, true) < 0)
490 gfc_fatal_error ("Argument to -fqkind isn't a valid real kind");
491 gfc_option
.q_kind
= value
;
494 case OPT_fdefault_integer_8
:
495 gfc_option
.flag_default_integer
= value
;
498 case OPT_fdefault_real_8
:
499 gfc_option
.flag_default_real
= value
;
502 case OPT_fdefault_double_8
:
503 gfc_option
.flag_default_double
= value
;
507 gfc_add_include_path (arg
);
512 gfc_handle_module_path_options (arg
);
516 gfc_handle_fpe_trap_option (arg
);
520 gfc_option
.allow_std
= GFC_STD_F95_OBS
| GFC_STD_F95
| GFC_STD_F77
;
521 gfc_option
.warn_std
= GFC_STD_F95_OBS
;
522 gfc_option
.max_identifier_length
= 31;
526 gfc_option
.allow_std
= GFC_STD_F95_OBS
| GFC_STD_F77
527 | GFC_STD_F2003
| GFC_STD_F95
;
528 gfc_option
.warn_std
= GFC_STD_F95_OBS
;
529 gfc_option
.max_identifier_length
= 63;
533 gfc_option
.allow_std
= GFC_STD_F95_OBS
| GFC_STD_F95_DEL
534 | GFC_STD_F77
| GFC_STD_F95
| GFC_STD_F2003
535 | GFC_STD_GNU
| GFC_STD_LEGACY
;
536 gfc_option
.warn_std
= GFC_STD_F95_OBS
| GFC_STD_F95_DEL
541 gfc_option
.allow_std
= GFC_STD_F95_OBS
| GFC_STD_F95_DEL
542 | GFC_STD_F77
| GFC_STD_F95
| GFC_STD_F2003
543 | GFC_STD_GNU
| GFC_STD_LEGACY
;
544 gfc_option
.warn_std
= 0;
547 case OPT_Wnonstd_intrinsics
:
548 gfc_option
.warn_nonstd_intrinsics
= 1;
551 case OPT_fshort_enums
:
552 gfc_option
.fshort_enums
= 1;