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 = 72;
50 gfc_option.max_identifier_length = GFC_MAX_SYMBOL_LEN;
51 gfc_option.verbose = 0;
53 gfc_option.warn_aliasing = 0;
54 gfc_option.warn_conversion = 0;
55 gfc_option.warn_implicit_interface = 0;
56 gfc_option.warn_line_truncation = 0;
57 gfc_option.warn_underflow = 1;
58 gfc_option.warn_surprising = 0;
59 gfc_option.warn_unused_labels = 0;
61 gfc_option.flag_default_double = 0;
62 gfc_option.flag_default_integer = 0;
63 gfc_option.flag_default_real = 0;
64 gfc_option.flag_dollar_ok = 0;
65 gfc_option.flag_underscoring = 1;
66 gfc_option.flag_f2c = 0;
67 gfc_option.flag_second_underscore = -1;
68 gfc_option.flag_implicit_none = 0;
69 gfc_option.flag_max_stack_var_size = 32768;
70 gfc_option.flag_module_access_private = 0;
71 gfc_option.flag_no_backend = 0;
72 gfc_option.flag_pack_derived = 0;
73 gfc_option.flag_repack_arrays = 0;
74 gfc_option.flag_automatic = 1;
75 gfc_option.flag_backslash = 1;
76 gfc_option.flag_cray_pointer = 0;
77 gfc_option.flag_d_lines = -1;
79 gfc_option.q_kind = gfc_default_double_kind;
83 flag_argument_noalias = 2;
86 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
87 | GFC_STD_F2003 | GFC_STD_F95 | GFC_STD_F77 | GFC_STD_GNU
89 gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
90 | GFC_STD_F2003 | GFC_STD_LEGACY;
92 gfc_option.warn_nonstd_intrinsics = 0;
94 /* -fshort-enums can be default on some targets. */
95 gfc_option.fshort_enums = targetm.default_short_enums ();
101 /* Determine the source form from the filename extension. We assume
102 case insensitivity. */
104 static gfc_source_form
105 form_from_filename (const char *filename)
110 const char *extension;
111 gfc_source_form form;
129 }; /* sentinel value */
131 gfc_source_form f_form;
135 /* Find end of file name. Note, filename is either a NULL pointer or
136 a NUL terminated string. */
138 while (filename[i] != '\0')
141 /* Find last period. */
142 while (i >= 0 && (filename[i] != '.'))
145 /* Did we see a file extension? */
147 return FORM_UNKNOWN; /* Nope */
149 /* Get file extension and compare it to others. */
150 fileext = &(filename[i]);
153 f_form = FORM_UNKNOWN;
157 if (strcasecmp (fileext, exttype[i].extension) == 0)
159 f_form = exttype[i].form;
163 while (exttype[i].form != FORM_UNKNOWN);
169 /* Finalize commandline options. */
172 gfc_post_options (const char **pfilename)
174 const char *filename = *pfilename;
178 /* Verify the input file name. */
179 if (!filename || strcmp (filename, "-") == 0)
184 gfc_source_file = filename;
186 /* Adds the path where the source file is to the list of include files. */
188 i = strlen(gfc_source_file);
189 while (i > 0 && !IS_DIR_SEPARATOR(gfc_source_file[i]))
193 source_path = alloca (i + 1);
194 memcpy (source_path, gfc_source_file, i);
196 gfc_add_include_path (source_path);
199 gfc_add_include_path (".");
201 /* Decide which form the file will be read in as. */
203 if (gfc_option.source_form != FORM_UNKNOWN)
204 gfc_current_form = gfc_option.source_form;
207 gfc_current_form = form_from_filename (filename);
209 if (gfc_current_form == FORM_UNKNOWN)
211 gfc_current_form = FORM_FREE;
212 gfc_warning_now ("Reading file '%s' as free form.",
213 (filename[0] == '\0') ? "<stdin>" : filename);
217 /* If the user specified -fd-lines-as-{code|comments} verify that we're
219 if (gfc_current_form == FORM_FREE)
221 if (gfc_option.flag_d_lines == 0)
222 gfc_warning_now ("'-fd-lines-as-comments' has no effect "
224 else if (gfc_option.flag_d_lines == 1)
225 gfc_warning_now ("'-fd-lines-as-code' has no effect "
229 flag_inline_trees = 1;
231 /* Use tree inlining. */
234 if (flag_inline_functions)
235 flag_inline_trees = 2;
237 /* If -pedantic, warn about the use of GNU extensions. */
238 if (pedantic && (gfc_option.allow_std & GFC_STD_GNU) != 0)
239 gfc_option.warn_std |= GFC_STD_GNU;
240 /* -std=legacy -pedantic is effectively -std=gnu. */
241 if (pedantic && (gfc_option.allow_std & GFC_STD_LEGACY) != 0)
242 gfc_option.warn_std |= GFC_STD_F95_OBS | GFC_STD_F95_DEL | GFC_STD_LEGACY;
244 /* If the user didn't explicitly specify -f(no)-second-underscore we
245 use it if we're trying to be compatible with f2c, and not
247 if (gfc_option.flag_second_underscore == -1)
248 gfc_option.flag_second_underscore = gfc_option.flag_f2c;
250 /* Implement -fno-automatic as -fmax-stack-var-size=0. */
251 if (!gfc_option.flag_automatic)
252 gfc_option.flag_max_stack_var_size = 0;
258 /* Set the options for -Wall. */
264 gfc_option.warn_aliasing = 1;
265 gfc_option.warn_line_truncation = 1;
266 gfc_option.warn_underflow = 1;
267 gfc_option.warn_surprising = 1;
268 gfc_option.warn_unused_labels = 1;
269 gfc_option.warn_nonstd_intrinsics = 1;
272 warn_return_type = 1;
275 /* We save the value of warn_uninitialized, since if they put
276 -Wuninitialized on the command line, we need to generate a
277 warning about not using it without also specifying -O. */
279 if (warn_uninitialized != 1)
280 warn_uninitialized = 2;
285 gfc_handle_module_path_options (const char *arg)
288 if (gfc_option.module_dir != NULL)
290 gfc_status ("gfortran: Only one -M option allowed\n");
296 gfc_status ("gfortran: Directory required after -M\n");
300 gfc_option.module_dir = (char *) gfc_getmem (strlen (arg) + 2);
301 strcpy (gfc_option.module_dir, arg);
302 strcat (gfc_option.module_dir, "/");
306 gfc_handle_fpe_trap_option (const char *arg)
308 int result, pos = 0, n;
309 static const char * const exception[] = { "invalid", "denormal", "zero",
310 "overflow", "underflow",
312 static const int opt_exception[] = { GFC_FPE_INVALID, GFC_FPE_DENORMAL,
313 GFC_FPE_ZERO, GFC_FPE_OVERFLOW,
314 GFC_FPE_UNDERFLOW, GFC_FPE_PRECISION,
321 while (arg[pos] && arg[pos] != ',')
324 for (n = 0; exception[n] != NULL; n++)
326 if (exception[n] && strncmp (exception[n], arg, pos) == 0)
328 gfc_option.fpe |= opt_exception[n];
336 gfc_fatal_error ("Argument to -ffpe-trap is not valid: %s", arg);
340 /* Handle command-line options. Returns 0 if unrecognized, 1 if
341 recognized and handled. */
343 gfc_handle_option (size_t scode, const char *arg, int value)
346 enum opt_code code = (enum opt_code) scode;
348 /* Ignore file names. */
363 gfc_option.warn_aliasing = value;
366 case OPT_Wconversion:
367 gfc_option.warn_conversion = value;
370 case OPT_Wimplicit_interface:
371 gfc_option.warn_implicit_interface = value;
374 case OPT_Wline_truncation:
375 gfc_option.warn_line_truncation = value;
379 gfc_option.warn_underflow = value;
382 case OPT_Wsurprising:
383 gfc_option.warn_surprising = value;
386 case OPT_Wunused_labels:
387 gfc_option.warn_unused_labels = value;
390 case OPT_fcray_pointer:
391 gfc_option.flag_cray_pointer = value;
395 gfc_option.flag_f2c = value;
399 gfc_option.flag_dollar_ok = value;
403 gfc_option.flag_automatic = value;
407 gfc_option.flag_backslash = value;
410 case OPT_fd_lines_as_code:
411 gfc_option.flag_d_lines = 1;
414 case OPT_fd_lines_as_comments:
415 gfc_option.flag_d_lines = 0;
418 case OPT_fdump_parse_tree:
419 gfc_option.verbose = value;
422 case OPT_ffixed_form:
423 gfc_option.source_form = FORM_FIXED;
427 gfc_option.source_form = FORM_FREE;
430 case OPT_funderscoring:
431 gfc_option.flag_underscoring = value;
434 case OPT_fsecond_underscore:
435 gfc_option.flag_second_underscore = value;
438 case OPT_fimplicit_none:
439 gfc_option.flag_implicit_none = value;
442 case OPT_fmax_stack_var_size_:
443 gfc_option.flag_max_stack_var_size = value;
446 case OPT_fmodule_private:
447 gfc_option.flag_module_access_private = value;
450 case OPT_fno_backend:
451 gfc_option.flag_no_backend = value;
454 case OPT_fpack_derived:
455 gfc_option.flag_pack_derived = value;
458 case OPT_frepack_arrays:
459 gfc_option.flag_repack_arrays = value;
462 case OPT_ffixed_line_length_none:
463 gfc_option.fixed_line_length = 0;
466 case OPT_ffixed_line_length_:
467 if (value != 0 && value < 7)
468 gfc_fatal_error ("Fixed line length must be at least seven.");
469 gfc_option.fixed_line_length = value;
472 case OPT_fmax_identifier_length_:
473 if (value > GFC_MAX_SYMBOL_LEN)
474 gfc_fatal_error ("Maximum supported idenitifier length is %d",
476 gfc_option.max_identifier_length = value;
480 if (gfc_validate_kind (BT_REAL, value, true) < 0)
481 gfc_fatal_error ("Argument to -fqkind isn't a valid real kind");
482 gfc_option.q_kind = value;
485 case OPT_fdefault_integer_8:
486 gfc_option.flag_default_integer = value;
489 case OPT_fdefault_real_8:
490 gfc_option.flag_default_real = value;
493 case OPT_fdefault_double_8:
494 gfc_option.flag_default_double = value;
498 gfc_add_include_path (arg);
503 gfc_handle_module_path_options (arg);
507 gfc_handle_fpe_trap_option (arg);
511 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95 | GFC_STD_F77;
512 gfc_option.warn_std = GFC_STD_F95_OBS;
513 gfc_option.max_identifier_length = 31;
517 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
518 | GFC_STD_F2003 | GFC_STD_F95;
519 gfc_option.warn_std = GFC_STD_F95_OBS;
520 gfc_option.max_identifier_length = 63;
524 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
525 | GFC_STD_F77 | GFC_STD_F95 | GFC_STD_F2003
526 | GFC_STD_GNU | GFC_STD_LEGACY;
527 gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
532 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
533 | GFC_STD_F77 | GFC_STD_F95 | GFC_STD_F2003
534 | GFC_STD_GNU | GFC_STD_LEGACY;
535 gfc_option.warn_std = 0;
538 case OPT_Wnonstd_intrinsics:
539 gfc_option.warn_nonstd_intrinsics = 1;
542 case OPT_fshort_enums:
543 gfc_option.fshort_enums = 1;