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_backslash = 1;
74 gfc_option.flag_d_lines = -1;
76 gfc_option.q_kind = gfc_default_double_kind;
78 flag_argument_noalias = 2;
81 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
82 | GFC_STD_F2003 | GFC_STD_F95 | GFC_STD_F77 | GFC_STD_GNU
84 gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
85 | GFC_STD_F2003 | GFC_STD_LEGACY;
87 gfc_option.warn_nonstd_intrinsics = 0;
93 /* Determine the source form from the filename extension. We assume
94 case insensitivity. */
96 static gfc_source_form
97 form_from_filename (const char *filename)
102 const char *extension;
103 gfc_source_form form;
121 }; /* sentinel value */
123 gfc_source_form f_form;
127 /* Find end of file name. Note, filename is either a NULL pointer or
128 a NUL terminated string. */
130 while (filename[i] != '\0')
133 /* Find last period. */
134 while (i >= 0 && (filename[i] != '.'))
137 /* Did we see a file extension? */
139 return FORM_UNKNOWN; /* Nope */
141 /* Get file extension and compare it to others. */
142 fileext = &(filename[i]);
145 f_form = FORM_UNKNOWN;
149 if (strcasecmp (fileext, exttype[i].extension) == 0)
151 f_form = exttype[i].form;
155 while (exttype[i].form != FORM_UNKNOWN);
161 /* Finalize commandline options. */
164 gfc_post_options (const char **pfilename)
166 const char *filename = *pfilename;
168 /* Verify the input file name. */
169 if (!filename || strcmp (filename, "-") == 0)
174 gfc_source_file = filename;
176 /* Decide which form the file will be read in as. */
178 if (gfc_option.source_form != FORM_UNKNOWN)
179 gfc_current_form = gfc_option.source_form;
182 gfc_current_form = form_from_filename (filename);
184 if (gfc_current_form == FORM_UNKNOWN)
186 gfc_current_form = FORM_FREE;
187 gfc_warning_now ("Reading file '%s' as free form.",
188 (filename[0] == '\0') ? "<stdin>" : filename);
192 /* If the user specified -fd-lines-as-{code|comments} verify that we're
194 if (gfc_current_form == FORM_FREE)
196 if (gfc_option.flag_d_lines == 0)
197 gfc_warning_now ("'-fd-lines-as-comments' has no effect "
199 else if (gfc_option.flag_d_lines == 1)
200 gfc_warning_now ("'-fd-lines-as-code' has no effect "
204 flag_inline_trees = 1;
206 /* Use tree inlining. */
209 if (flag_inline_functions)
210 flag_inline_trees = 2;
212 /* If -pedantic, warn about the use of GNU extensions. */
213 if (pedantic && (gfc_option.allow_std & GFC_STD_GNU) != 0)
214 gfc_option.warn_std |= GFC_STD_GNU;
215 /* -std=legacy -pedantic is effectively -std=gnu. */
216 if (pedantic && (gfc_option.allow_std & GFC_STD_LEGACY) != 0)
217 gfc_option.warn_std |= GFC_STD_F95_OBS | GFC_STD_F95_DEL | GFC_STD_LEGACY;
219 /* If the user didn't explicitly specify -f(no)-second-underscore we
220 use it if we're trying to be compatible with f2c, and not
222 if (gfc_option.flag_second_underscore == -1)
223 gfc_option.flag_second_underscore = gfc_option.flag_f2c;
229 /* Set the options for -Wall. */
235 gfc_option.warn_aliasing = 1;
236 gfc_option.warn_line_truncation = 1;
237 gfc_option.warn_underflow = 1;
238 gfc_option.warn_surprising = 1;
239 gfc_option.warn_unused_labels = 1;
240 gfc_option.warn_nonstd_intrinsics = 1;
243 warn_return_type = 1;
246 /* We save the value of warn_uninitialized, since if they put
247 -Wuninitialized on the command line, we need to generate a
248 warning about not using it without also specifying -O. */
250 if (warn_uninitialized != 1)
251 warn_uninitialized = 2;
256 gfc_handle_module_path_options (const char *arg)
259 if (gfc_option.module_dir != NULL)
261 gfc_status ("gfortran: Only one -M option allowed\n");
267 gfc_status ("gfortran: Directory required after -M\n");
271 gfc_option.module_dir = (char *) gfc_getmem (strlen (arg) + 2);
272 strcpy (gfc_option.module_dir, arg);
273 strcat (gfc_option.module_dir, "/");
276 /* Handle command-line options. Returns 0 if unrecognized, 1 if
277 recognized and handled. */
279 gfc_handle_option (size_t scode, const char *arg, int value)
282 enum opt_code code = (enum opt_code) scode;
284 /* Ignore file names. */
299 gfc_option.warn_aliasing = value;
302 case OPT_Wconversion:
303 gfc_option.warn_conversion = value;
306 case OPT_Wimplicit_interface:
307 gfc_option.warn_implicit_interface = value;
310 case OPT_Wline_truncation:
311 gfc_option.warn_line_truncation = value;
315 gfc_option.warn_underflow = value;
318 case OPT_Wsurprising:
319 gfc_option.warn_surprising = value;
322 case OPT_Wunused_labels:
323 gfc_option.warn_unused_labels = value;
327 gfc_option.flag_f2c = value;
331 gfc_option.flag_dollar_ok = value;
335 gfc_option.flag_backslash = value;
338 case OPT_fd_lines_as_code:
339 gfc_option.flag_d_lines = 1;
342 case OPT_fd_lines_as_comments:
343 gfc_option.flag_d_lines = 0;
346 case OPT_fdump_parse_tree:
347 gfc_option.verbose = value;
350 case OPT_ffixed_form:
351 gfc_option.source_form = FORM_FIXED;
355 gfc_option.source_form = FORM_FREE;
358 case OPT_funderscoring:
359 gfc_option.flag_underscoring = value;
362 case OPT_fsecond_underscore:
363 gfc_option.flag_second_underscore = value;
366 case OPT_fimplicit_none:
367 gfc_option.flag_implicit_none = value;
370 case OPT_fmax_stack_var_size_:
371 gfc_option.flag_max_stack_var_size = value;
374 case OPT_fmodule_private:
375 gfc_option.flag_module_access_private = value;
378 case OPT_fno_backend:
379 gfc_option.flag_no_backend = value;
382 case OPT_fpack_derived:
383 gfc_option.flag_pack_derived = value;
386 case OPT_frepack_arrays:
387 gfc_option.flag_repack_arrays = value;
390 case OPT_ffixed_line_length_none:
391 gfc_option.fixed_line_length = 0;
394 case OPT_ffixed_line_length_:
395 if (value != 0 && value < 7)
396 gfc_fatal_error ("Fixed line length must be at least seven.");
397 gfc_option.fixed_line_length = value;
400 case OPT_fmax_identifier_length_:
401 if (value > GFC_MAX_SYMBOL_LEN)
402 gfc_fatal_error ("Maximum supported idenitifier length is %d",
404 gfc_option.max_identifier_length = value;
408 if (gfc_validate_kind (BT_REAL, value, true) < 0)
409 gfc_fatal_error ("Argument to -fqkind isn't a valid real kind");
410 gfc_option.q_kind = value;
413 case OPT_fdefault_integer_8:
414 gfc_option.flag_default_integer = value;
417 case OPT_fdefault_real_8:
418 gfc_option.flag_default_real = value;
421 case OPT_fdefault_double_8:
422 gfc_option.flag_default_double = value;
426 gfc_add_include_path (arg);
431 gfc_handle_module_path_options (arg);
435 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95 | GFC_STD_F77;
436 gfc_option.warn_std = GFC_STD_F95_OBS;
437 gfc_option.max_identifier_length = 31;
441 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
442 | GFC_STD_F2003 | GFC_STD_F95;
443 gfc_option.warn_std = GFC_STD_F95_OBS;
444 gfc_option.max_identifier_length = 63;
448 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
449 | GFC_STD_F77 | GFC_STD_F95 | GFC_STD_F2003
450 | GFC_STD_GNU | GFC_STD_LEGACY;
451 gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
456 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
457 | GFC_STD_F77 | GFC_STD_F95 | GFC_STD_F2003
458 | GFC_STD_GNU | GFC_STD_LEGACY;
459 gfc_option.warn_std = 0;
462 case OPT_Wnonstd_intrinsics:
463 gfc_option.warn_nonstd_intrinsics = 1;