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"
36 gfc_option_t gfc_option;
39 /* Get ready for options handling. */
42 gfc_init_options (unsigned int argc ATTRIBUTE_UNUSED,
43 const char **argv ATTRIBUTE_UNUSED)
45 gfc_source_file = NULL;
46 gfc_option.module_dir = NULL;
47 gfc_option.source_form = FORM_UNKNOWN;
48 gfc_option.fixed_line_length = 72;
49 gfc_option.max_identifier_length = GFC_MAX_SYMBOL_LEN;
50 gfc_option.verbose = 0;
52 gfc_option.warn_aliasing = 0;
53 gfc_option.warn_conversion = 0;
54 gfc_option.warn_implicit_interface = 0;
55 gfc_option.warn_line_truncation = 0;
56 gfc_option.warn_underflow = 1;
57 gfc_option.warn_surprising = 0;
58 gfc_option.warn_unused_labels = 0;
60 gfc_option.flag_default_double = 0;
61 gfc_option.flag_default_integer = 0;
62 gfc_option.flag_default_real = 0;
63 gfc_option.flag_dollar_ok = 0;
64 gfc_option.flag_underscoring = 1;
65 gfc_option.flag_f2c = 0;
66 gfc_option.flag_second_underscore = -1;
67 gfc_option.flag_implicit_none = 0;
68 gfc_option.flag_max_stack_var_size = 32768;
69 gfc_option.flag_module_access_private = 0;
70 gfc_option.flag_no_backend = 0;
71 gfc_option.flag_pack_derived = 0;
72 gfc_option.flag_repack_arrays = 0;
73 gfc_option.flag_automatic = 1;
74 gfc_option.flag_backslash = 1;
75 gfc_option.flag_d_lines = -1;
77 gfc_option.q_kind = gfc_default_double_kind;
79 flag_argument_noalias = 2;
82 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
83 | GFC_STD_F2003 | GFC_STD_F95 | GFC_STD_F77 | GFC_STD_GNU
85 gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
86 | GFC_STD_F2003 | GFC_STD_LEGACY;
88 gfc_option.warn_nonstd_intrinsics = 0;
94 /* Determine the source form from the filename extension. We assume
95 case insensitivity. */
97 static gfc_source_form
98 form_from_filename (const char *filename)
103 const char *extension;
104 gfc_source_form form;
122 }; /* sentinel value */
124 gfc_source_form f_form;
128 /* Find end of file name. Note, filename is either a NULL pointer or
129 a NUL terminated string. */
131 while (filename[i] != '\0')
134 /* Find last period. */
135 while (i >= 0 && (filename[i] != '.'))
138 /* Did we see a file extension? */
140 return FORM_UNKNOWN; /* Nope */
142 /* Get file extension and compare it to others. */
143 fileext = &(filename[i]);
146 f_form = FORM_UNKNOWN;
150 if (strcasecmp (fileext, exttype[i].extension) == 0)
152 f_form = exttype[i].form;
156 while (exttype[i].form != FORM_UNKNOWN);
162 /* Finalize commandline options. */
165 gfc_post_options (const char **pfilename)
167 const char *filename = *pfilename;
169 /* Verify the input file name. */
170 if (!filename || strcmp (filename, "-") == 0)
175 gfc_source_file = filename;
177 /* Decide which form the file will be read in as. */
179 if (gfc_option.source_form != FORM_UNKNOWN)
180 gfc_current_form = gfc_option.source_form;
183 gfc_current_form = form_from_filename (filename);
185 if (gfc_current_form == FORM_UNKNOWN)
187 gfc_current_form = FORM_FREE;
188 gfc_warning_now ("Reading file '%s' as free form.",
189 (filename[0] == '\0') ? "<stdin>" : filename);
193 /* If the user specified -fd-lines-as-{code|comments} verify that we're
195 if (gfc_current_form == FORM_FREE)
197 if (gfc_option.flag_d_lines == 0)
198 gfc_warning_now ("'-fd-lines-as-comments' has no effect "
200 else if (gfc_option.flag_d_lines == 1)
201 gfc_warning_now ("'-fd-lines-as-code' has no effect "
205 flag_inline_trees = 1;
207 /* Use tree inlining. */
210 if (flag_inline_functions)
211 flag_inline_trees = 2;
213 /* If -pedantic, warn about the use of GNU extensions. */
214 if (pedantic && (gfc_option.allow_std & GFC_STD_GNU) != 0)
215 gfc_option.warn_std |= GFC_STD_GNU;
216 /* -std=legacy -pedantic is effectively -std=gnu. */
217 if (pedantic && (gfc_option.allow_std & GFC_STD_LEGACY) != 0)
218 gfc_option.warn_std |= GFC_STD_F95_OBS | GFC_STD_F95_DEL | GFC_STD_LEGACY;
220 /* If the user didn't explicitly specify -f(no)-second-underscore we
221 use it if we're trying to be compatible with f2c, and not
223 if (gfc_option.flag_second_underscore == -1)
224 gfc_option.flag_second_underscore = gfc_option.flag_f2c;
230 /* Set the options for -Wall. */
236 gfc_option.warn_aliasing = 1;
237 gfc_option.warn_line_truncation = 1;
238 gfc_option.warn_underflow = 1;
239 gfc_option.warn_surprising = 1;
240 gfc_option.warn_unused_labels = 1;
241 gfc_option.warn_nonstd_intrinsics = 1;
244 warn_return_type = 1;
247 /* We save the value of warn_uninitialized, since if they put
248 -Wuninitialized on the command line, we need to generate a
249 warning about not using it without also specifying -O. */
251 if (warn_uninitialized != 1)
252 warn_uninitialized = 2;
257 gfc_handle_module_path_options (const char *arg)
260 if (gfc_option.module_dir != NULL)
262 gfc_status ("gfortran: Only one -M option allowed\n");
268 gfc_status ("gfortran: Directory required after -M\n");
272 gfc_option.module_dir = (char *) gfc_getmem (strlen (arg) + 2);
273 strcpy (gfc_option.module_dir, arg);
274 strcat (gfc_option.module_dir, "/");
277 /* Handle command-line options. Returns 0 if unrecognized, 1 if
278 recognized and handled. */
280 gfc_handle_option (size_t scode, const char *arg, int value)
283 enum opt_code code = (enum opt_code) scode;
285 /* Ignore file names. */
300 gfc_option.warn_aliasing = value;
303 case OPT_Wconversion:
304 gfc_option.warn_conversion = value;
307 case OPT_Wimplicit_interface:
308 gfc_option.warn_implicit_interface = value;
311 case OPT_Wline_truncation:
312 gfc_option.warn_line_truncation = value;
316 gfc_option.warn_underflow = value;
319 case OPT_Wsurprising:
320 gfc_option.warn_surprising = value;
323 case OPT_Wunused_labels:
324 gfc_option.warn_unused_labels = value;
328 gfc_option.flag_f2c = value;
332 gfc_option.flag_dollar_ok = value;
336 gfc_option.flag_automatic = value;
340 gfc_option.flag_backslash = value;
343 case OPT_fd_lines_as_code:
344 gfc_option.flag_d_lines = 1;
347 case OPT_fd_lines_as_comments:
348 gfc_option.flag_d_lines = 0;
351 case OPT_fdump_parse_tree:
352 gfc_option.verbose = value;
355 case OPT_ffixed_form:
356 gfc_option.source_form = FORM_FIXED;
360 gfc_option.source_form = FORM_FREE;
363 case OPT_funderscoring:
364 gfc_option.flag_underscoring = value;
367 case OPT_fsecond_underscore:
368 gfc_option.flag_second_underscore = value;
371 case OPT_fimplicit_none:
372 gfc_option.flag_implicit_none = value;
375 case OPT_fmax_stack_var_size_:
376 gfc_option.flag_max_stack_var_size = value;
379 case OPT_fmodule_private:
380 gfc_option.flag_module_access_private = value;
383 case OPT_fno_backend:
384 gfc_option.flag_no_backend = value;
387 case OPT_fpack_derived:
388 gfc_option.flag_pack_derived = value;
391 case OPT_frepack_arrays:
392 gfc_option.flag_repack_arrays = value;
395 case OPT_ffixed_line_length_none:
396 gfc_option.fixed_line_length = 0;
399 case OPT_ffixed_line_length_:
400 if (value != 0 && value < 7)
401 gfc_fatal_error ("Fixed line length must be at least seven.");
402 gfc_option.fixed_line_length = value;
405 case OPT_fmax_identifier_length_:
406 if (value > GFC_MAX_SYMBOL_LEN)
407 gfc_fatal_error ("Maximum supported idenitifier length is %d",
409 gfc_option.max_identifier_length = value;
413 if (gfc_validate_kind (BT_REAL, value, true) < 0)
414 gfc_fatal_error ("Argument to -fqkind isn't a valid real kind");
415 gfc_option.q_kind = value;
418 case OPT_fdefault_integer_8:
419 gfc_option.flag_default_integer = value;
422 case OPT_fdefault_real_8:
423 gfc_option.flag_default_real = value;
426 case OPT_fdefault_double_8:
427 gfc_option.flag_default_double = value;
431 gfc_add_include_path (arg);
436 gfc_handle_module_path_options (arg);
440 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95 | GFC_STD_F77;
441 gfc_option.warn_std = GFC_STD_F95_OBS;
442 gfc_option.max_identifier_length = 31;
446 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
447 | GFC_STD_F2003 | GFC_STD_F95;
448 gfc_option.warn_std = GFC_STD_F95_OBS;
449 gfc_option.max_identifier_length = 63;
453 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
454 | GFC_STD_F77 | GFC_STD_F95 | GFC_STD_F2003
455 | GFC_STD_GNU | GFC_STD_LEGACY;
456 gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
461 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
462 | GFC_STD_F77 | GFC_STD_F95 | GFC_STD_F2003
463 | GFC_STD_GNU | GFC_STD_LEGACY;
464 gfc_option.warn_std = 0;
467 case OPT_Wnonstd_intrinsics:
468 gfc_option.warn_nonstd_intrinsics = 1;