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_pack_derived = 0;
77 gfc_option.flag_repack_arrays = 0;
78 gfc_option.flag_preprocessed = 0;
79 gfc_option.flag_automatic = 1;
80 gfc_option.flag_backslash = 1;
81 gfc_option.flag_cray_pointer = 0;
82 gfc_option.flag_d_lines = -1;
83 gfc_option.flag_openmp = 0;
85 gfc_option.q_kind = gfc_default_double_kind;
89 /* Argument pointers cannot point to anything
90 but their argument. */
91 flag_argument_noalias = 3;
95 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
96 | GFC_STD_F2003 | GFC_STD_F95 | GFC_STD_F77 | GFC_STD_GNU
98 gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
101 gfc_option.warn_nonstd_intrinsics = 0;
103 /* -fshort-enums can be default on some targets. */
104 gfc_option.fshort_enums = targetm.default_short_enums ();
110 /* Determine the source form from the filename extension. We assume
111 case insensitivity. */
113 static gfc_source_form
114 form_from_filename (const char *filename)
119 const char *extension;
120 gfc_source_form form;
138 }; /* sentinel value */
140 gfc_source_form f_form;
144 /* Find end of file name. Note, filename is either a NULL pointer or
145 a NUL terminated string. */
147 while (filename[i] != '\0')
150 /* Find last period. */
151 while (i >= 0 && (filename[i] != '.'))
154 /* Did we see a file extension? */
156 return FORM_UNKNOWN; /* Nope */
158 /* Get file extension and compare it to others. */
159 fileext = &(filename[i]);
162 f_form = FORM_UNKNOWN;
166 if (strcasecmp (fileext, exttype[i].extension) == 0)
168 f_form = exttype[i].form;
172 while (exttype[i].form != FORM_UNKNOWN);
178 /* Finalize commandline options. */
181 gfc_post_options (const char **pfilename)
183 const char *filename = *pfilename, *canon_source_file = NULL;
187 /* Verify the input file name. */
188 if (!filename || strcmp (filename, "-") == 0)
193 if (gfc_option.flag_preprocessed)
195 /* For preprocessed files, if the first tokens are of the form # NUM.
196 handle the directives so we know the original file name. */
197 gfc_source_file = gfc_read_orig_filename (filename, &canon_source_file);
198 if (gfc_source_file == NULL)
199 gfc_source_file = filename;
201 *pfilename = gfc_source_file;
204 gfc_source_file = filename;
206 if (canon_source_file == NULL)
207 canon_source_file = gfc_source_file;
209 /* Adds the path where the source file is to the list of include files. */
211 i = strlen (canon_source_file);
212 while (i > 0 && !IS_DIR_SEPARATOR (canon_source_file[i]))
216 source_path = alloca (i + 1);
217 memcpy (source_path, canon_source_file, i);
219 gfc_add_include_path (source_path);
222 gfc_add_include_path (".");
224 if (canon_source_file != gfc_source_file)
225 gfc_free ((void *) canon_source_file);
227 /* Decide which form the file will be read in as. */
229 if (gfc_option.source_form != FORM_UNKNOWN)
230 gfc_current_form = gfc_option.source_form;
233 gfc_current_form = form_from_filename (filename);
235 if (gfc_current_form == FORM_UNKNOWN)
237 gfc_current_form = FORM_FREE;
238 gfc_warning_now ("Reading file '%s' as free form.",
239 (filename[0] == '\0') ? "<stdin>" : filename);
243 /* If the user specified -fd-lines-as-{code|comments} verify that we're
245 if (gfc_current_form == FORM_FREE)
247 if (gfc_option.flag_d_lines == 0)
248 gfc_warning_now ("'-fd-lines-as-comments' has no effect "
250 else if (gfc_option.flag_d_lines == 1)
251 gfc_warning_now ("'-fd-lines-as-code' has no effect "
255 flag_inline_trees = 1;
257 /* Use tree inlining. */
260 if (flag_inline_functions)
261 flag_inline_trees = 2;
263 /* If -pedantic, warn about the use of GNU extensions. */
264 if (pedantic && (gfc_option.allow_std & GFC_STD_GNU) != 0)
265 gfc_option.warn_std |= GFC_STD_GNU;
266 /* -std=legacy -pedantic is effectively -std=gnu. */
267 if (pedantic && (gfc_option.allow_std & GFC_STD_LEGACY) != 0)
268 gfc_option.warn_std |= GFC_STD_F95_OBS | GFC_STD_F95_DEL | GFC_STD_LEGACY;
270 /* If the user didn't explicitly specify -f(no)-second-underscore we
271 use it if we're trying to be compatible with f2c, and not
273 if (gfc_option.flag_second_underscore == -1)
274 gfc_option.flag_second_underscore = gfc_option.flag_f2c;
276 /* Implement -fno-automatic as -fmax-stack-var-size=0. */
277 if (!gfc_option.flag_automatic)
278 gfc_option.flag_max_stack_var_size = 0;
281 gfc_option.warn_ampersand = 1;
283 if (gfc_option.flag_all_intrinsics)
284 gfc_option.warn_nonstd_intrinsics = 0;
290 /* Set the options for -Wall. */
296 gfc_option.warn_aliasing = 1;
297 gfc_option.warn_ampersand = 1;
298 gfc_option.warn_line_truncation = 1;
299 gfc_option.warn_nonstd_intrinsics = 1;
300 gfc_option.warn_surprising = 1;
301 gfc_option.warn_tabs = 0;
302 gfc_option.warn_underflow = 1;
303 gfc_option.warn_unused_labels = 1;
306 warn_return_type = 1;
309 /* We save the value of warn_uninitialized, since if they put
310 -Wuninitialized on the command line, we need to generate a
311 warning about not using it without also specifying -O. */
313 if (warn_uninitialized != 1)
314 warn_uninitialized = 2;
319 gfc_handle_module_path_options (const char *arg)
322 if (gfc_option.module_dir != NULL)
324 gfc_status ("gfortran: Only one -M option allowed\n");
330 gfc_status ("gfortran: Directory required after -M\n");
334 gfc_option.module_dir = (char *) gfc_getmem (strlen (arg) + 2);
335 strcpy (gfc_option.module_dir, arg);
336 strcat (gfc_option.module_dir, "/");
340 gfc_handle_fpe_trap_option (const char *arg)
342 int result, pos = 0, n;
343 static const char * const exception[] = { "invalid", "denormal", "zero",
344 "overflow", "underflow",
346 static const int opt_exception[] = { GFC_FPE_INVALID, GFC_FPE_DENORMAL,
347 GFC_FPE_ZERO, GFC_FPE_OVERFLOW,
348 GFC_FPE_UNDERFLOW, GFC_FPE_PRECISION,
355 while (arg[pos] && arg[pos] != ',')
358 for (n = 0; exception[n] != NULL; n++)
360 if (exception[n] && strncmp (exception[n], arg, pos) == 0)
362 gfc_option.fpe |= opt_exception[n];
370 gfc_fatal_error ("Argument to -ffpe-trap is not valid: %s", arg);
374 /* Handle command-line options. Returns 0 if unrecognized, 1 if
375 recognized and handled. */
377 gfc_handle_option (size_t scode, const char *arg, int value)
380 enum opt_code code = (enum opt_code) scode;
382 /* Ignore file names. */
397 gfc_option.warn_aliasing = value;
401 gfc_option.warn_ampersand = value;
404 case OPT_Wconversion:
405 gfc_option.warn_conversion = value;
408 case OPT_Wimplicit_interface:
409 gfc_option.warn_implicit_interface = value;
412 case OPT_Wline_truncation:
413 gfc_option.warn_line_truncation = value;
416 case OPT_Wsurprising:
417 gfc_option.warn_surprising = value;
421 gfc_option.warn_tabs = value;
425 gfc_option.warn_underflow = value;
428 case OPT_Wunused_labels:
429 gfc_option.warn_unused_labels = value;
432 case OPT_fall_intrinsics:
433 gfc_option.flag_all_intrinsics = 1;
437 gfc_option.flag_automatic = value;
441 gfc_option.flag_backslash = value;
444 case OPT_fcray_pointer:
445 gfc_option.flag_cray_pointer = value;
449 gfc_option.flag_f2c = value;
453 gfc_option.flag_dollar_ok = value;
456 case OPT_fd_lines_as_code:
457 gfc_option.flag_d_lines = 1;
460 case OPT_fd_lines_as_comments:
461 gfc_option.flag_d_lines = 0;
464 case OPT_fdump_parse_tree:
465 gfc_option.verbose = value;
468 case OPT_ffixed_form:
469 gfc_option.source_form = FORM_FIXED;
472 case OPT_ffixed_line_length_none:
473 gfc_option.fixed_line_length = 0;
476 case OPT_ffixed_line_length_:
477 if (value != 0 && value < 7)
478 gfc_fatal_error ("Fixed line length must be at least seven.");
479 gfc_option.fixed_line_length = value;
483 gfc_option.source_form = FORM_FREE;
487 gfc_option.flag_openmp = value;
490 case OPT_ffree_line_length_none:
491 gfc_option.free_line_length = 0;
494 case OPT_ffree_line_length_:
495 gfc_option.free_line_length = value;
498 case OPT_funderscoring:
499 gfc_option.flag_underscoring = value;
502 case OPT_fsecond_underscore:
503 gfc_option.flag_second_underscore = value;
506 case OPT_fimplicit_none:
507 gfc_option.flag_implicit_none = value;
510 case OPT_fmax_stack_var_size_:
511 gfc_option.flag_max_stack_var_size = value;
514 case OPT_fmodule_private:
515 gfc_option.flag_module_access_private = value;
518 case OPT_fno_backend:
519 gfc_option.flag_no_backend = value;
522 case OPT_fpack_derived:
523 gfc_option.flag_pack_derived = value;
526 case OPT_frepack_arrays:
527 gfc_option.flag_repack_arrays = value;
530 case OPT_fpreprocessed:
531 gfc_option.flag_preprocessed = value;
534 case OPT_fmax_identifier_length_:
535 if (value > GFC_MAX_SYMBOL_LEN)
536 gfc_fatal_error ("Maximum supported idenitifier length is %d",
538 gfc_option.max_identifier_length = value;
542 if (gfc_validate_kind (BT_REAL, value, true) < 0)
543 gfc_fatal_error ("Argument to -fqkind isn't a valid real kind");
544 gfc_option.q_kind = value;
547 case OPT_fdefault_integer_8:
548 gfc_option.flag_default_integer = value;
551 case OPT_fdefault_real_8:
552 gfc_option.flag_default_real = value;
555 case OPT_fdefault_double_8:
556 gfc_option.flag_default_double = value;
560 gfc_add_include_path (arg);
565 gfc_handle_module_path_options (arg);
569 gfc_handle_fpe_trap_option (arg);
573 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95 | GFC_STD_F77;
574 gfc_option.warn_std = GFC_STD_F95_OBS;
575 gfc_option.max_identifier_length = 31;
576 gfc_option.warn_ampersand = 1;
577 gfc_option.warn_tabs = 0;
581 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
582 | GFC_STD_F2003 | GFC_STD_F95;
583 gfc_option.warn_std = GFC_STD_F95_OBS;
584 gfc_option.max_identifier_length = 63;
585 gfc_option.warn_ampersand = 1;
589 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
590 | GFC_STD_F77 | GFC_STD_F95 | GFC_STD_F2003
591 | GFC_STD_GNU | GFC_STD_LEGACY;
592 gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
597 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
598 | GFC_STD_F77 | GFC_STD_F95 | GFC_STD_F2003
599 | GFC_STD_GNU | GFC_STD_LEGACY;
600 gfc_option.warn_std = 0;
603 case OPT_Wnonstd_intrinsics:
604 gfc_option.warn_nonstd_intrinsics = value;
607 case OPT_fshort_enums:
608 gfc_option.fshort_enums = 1;
611 case OPT_fconvert_little_endian:
612 gfc_option.convert = CONVERT_LITTLE;
615 case OPT_fconvert_big_endian:
616 gfc_option.convert = CONVERT_BIG;
619 case OPT_fconvert_native:
620 gfc_option.convert = CONVERT_NATIVE;
623 case OPT_fconvert_swap:
624 gfc_option.convert = CONVERT_SWAP;
627 case OPT_frecord_marker_4:
628 gfc_option.record_marker = 4;
631 case OPT_frecord_marker_8:
632 gfc_option.record_marker = 8;