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_conversion = 0;
56 gfc_option.warn_implicit_interface = 0;
57 gfc_option.warn_line_truncation = 0;
58 gfc_option.warn_surprising = 0;
59 gfc_option.warn_tabs = 1;
60 gfc_option.warn_underflow = 1;
61 gfc_option.warn_unused_labels = 0;
63 gfc_option.flag_default_double = 0;
64 gfc_option.flag_default_integer = 0;
65 gfc_option.flag_default_real = 0;
66 gfc_option.flag_dollar_ok = 0;
67 gfc_option.flag_underscoring = 1;
68 gfc_option.flag_f2c = 0;
69 gfc_option.flag_second_underscore = -1;
70 gfc_option.flag_implicit_none = 0;
71 gfc_option.flag_max_stack_var_size = 32768;
72 gfc_option.flag_module_access_private = 0;
73 gfc_option.flag_no_backend = 0;
74 gfc_option.flag_pack_derived = 0;
75 gfc_option.flag_repack_arrays = 0;
76 gfc_option.flag_preprocessed = 0;
77 gfc_option.flag_automatic = 1;
78 gfc_option.flag_backslash = 1;
79 gfc_option.flag_cray_pointer = 0;
80 gfc_option.flag_d_lines = -1;
81 gfc_option.flag_openmp = 0;
83 gfc_option.q_kind = gfc_default_double_kind;
87 flag_argument_noalias = 2;
90 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
91 | GFC_STD_F2003 | GFC_STD_F95 | GFC_STD_F77 | GFC_STD_GNU
93 gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
96 gfc_option.warn_nonstd_intrinsics = 0;
98 /* -fshort-enums can be default on some targets. */
99 gfc_option.fshort_enums = targetm.default_short_enums ();
105 /* Determine the source form from the filename extension. We assume
106 case insensitivity. */
108 static gfc_source_form
109 form_from_filename (const char *filename)
114 const char *extension;
115 gfc_source_form form;
133 }; /* sentinel value */
135 gfc_source_form f_form;
139 /* Find end of file name. Note, filename is either a NULL pointer or
140 a NUL terminated string. */
142 while (filename[i] != '\0')
145 /* Find last period. */
146 while (i >= 0 && (filename[i] != '.'))
149 /* Did we see a file extension? */
151 return FORM_UNKNOWN; /* Nope */
153 /* Get file extension and compare it to others. */
154 fileext = &(filename[i]);
157 f_form = FORM_UNKNOWN;
161 if (strcasecmp (fileext, exttype[i].extension) == 0)
163 f_form = exttype[i].form;
167 while (exttype[i].form != FORM_UNKNOWN);
173 /* Finalize commandline options. */
176 gfc_post_options (const char **pfilename)
178 const char *filename = *pfilename, *canon_source_file = NULL;
182 /* Verify the input file name. */
183 if (!filename || strcmp (filename, "-") == 0)
188 if (gfc_option.flag_preprocessed)
190 /* For preprocessed files, if the first tokens are of the form # NUM.
191 handle the directives so we know the original file name. */
192 gfc_source_file = gfc_read_orig_filename (filename, &canon_source_file);
193 if (gfc_source_file == NULL)
194 gfc_source_file = filename;
196 *pfilename = gfc_source_file;
199 gfc_source_file = filename;
201 if (canon_source_file == NULL)
202 canon_source_file = gfc_source_file;
204 /* Adds the path where the source file is to the list of include files. */
206 i = strlen (canon_source_file);
207 while (i > 0 && !IS_DIR_SEPARATOR (canon_source_file[i]))
211 source_path = alloca (i + 1);
212 memcpy (source_path, canon_source_file, i);
214 gfc_add_include_path (source_path);
217 gfc_add_include_path (".");
219 if (canon_source_file != gfc_source_file)
220 gfc_free ((void *) canon_source_file);
222 /* Decide which form the file will be read in as. */
224 if (gfc_option.source_form != FORM_UNKNOWN)
225 gfc_current_form = gfc_option.source_form;
228 gfc_current_form = form_from_filename (filename);
230 if (gfc_current_form == FORM_UNKNOWN)
232 gfc_current_form = FORM_FREE;
233 gfc_warning_now ("Reading file '%s' as free form.",
234 (filename[0] == '\0') ? "<stdin>" : filename);
238 /* If the user specified -fd-lines-as-{code|comments} verify that we're
240 if (gfc_current_form == FORM_FREE)
242 if (gfc_option.flag_d_lines == 0)
243 gfc_warning_now ("'-fd-lines-as-comments' has no effect "
245 else if (gfc_option.flag_d_lines == 1)
246 gfc_warning_now ("'-fd-lines-as-code' has no effect "
250 flag_inline_trees = 1;
252 /* Use tree inlining. */
255 if (flag_inline_functions)
256 flag_inline_trees = 2;
258 /* If -pedantic, warn about the use of GNU extensions. */
259 if (pedantic && (gfc_option.allow_std & GFC_STD_GNU) != 0)
260 gfc_option.warn_std |= GFC_STD_GNU;
261 /* -std=legacy -pedantic is effectively -std=gnu. */
262 if (pedantic && (gfc_option.allow_std & GFC_STD_LEGACY) != 0)
263 gfc_option.warn_std |= GFC_STD_F95_OBS | GFC_STD_F95_DEL | GFC_STD_LEGACY;
265 /* If the user didn't explicitly specify -f(no)-second-underscore we
266 use it if we're trying to be compatible with f2c, and not
268 if (gfc_option.flag_second_underscore == -1)
269 gfc_option.flag_second_underscore = gfc_option.flag_f2c;
271 /* Implement -fno-automatic as -fmax-stack-var-size=0. */
272 if (!gfc_option.flag_automatic)
273 gfc_option.flag_max_stack_var_size = 0;
279 /* Set the options for -Wall. */
285 gfc_option.warn_aliasing = 1;
286 gfc_option.warn_line_truncation = 1;
287 gfc_option.warn_nonstd_intrinsics = 1;
288 gfc_option.warn_surprising = 1;
289 gfc_option.warn_tabs = 0;
290 gfc_option.warn_underflow = 1;
291 gfc_option.warn_unused_labels = 1;
294 warn_return_type = 1;
297 /* We save the value of warn_uninitialized, since if they put
298 -Wuninitialized on the command line, we need to generate a
299 warning about not using it without also specifying -O. */
301 if (warn_uninitialized != 1)
302 warn_uninitialized = 2;
307 gfc_handle_module_path_options (const char *arg)
310 if (gfc_option.module_dir != NULL)
312 gfc_status ("gfortran: Only one -M option allowed\n");
318 gfc_status ("gfortran: Directory required after -M\n");
322 gfc_option.module_dir = (char *) gfc_getmem (strlen (arg) + 2);
323 strcpy (gfc_option.module_dir, arg);
324 strcat (gfc_option.module_dir, "/");
328 gfc_handle_fpe_trap_option (const char *arg)
330 int result, pos = 0, n;
331 static const char * const exception[] = { "invalid", "denormal", "zero",
332 "overflow", "underflow",
334 static const int opt_exception[] = { GFC_FPE_INVALID, GFC_FPE_DENORMAL,
335 GFC_FPE_ZERO, GFC_FPE_OVERFLOW,
336 GFC_FPE_UNDERFLOW, GFC_FPE_PRECISION,
343 while (arg[pos] && arg[pos] != ',')
346 for (n = 0; exception[n] != NULL; n++)
348 if (exception[n] && strncmp (exception[n], arg, pos) == 0)
350 gfc_option.fpe |= opt_exception[n];
358 gfc_fatal_error ("Argument to -ffpe-trap is not valid: %s", arg);
362 /* Handle command-line options. Returns 0 if unrecognized, 1 if
363 recognized and handled. */
365 gfc_handle_option (size_t scode, const char *arg, int value)
368 enum opt_code code = (enum opt_code) scode;
370 /* Ignore file names. */
385 gfc_option.warn_aliasing = value;
388 case OPT_Wconversion:
389 gfc_option.warn_conversion = value;
392 case OPT_Wimplicit_interface:
393 gfc_option.warn_implicit_interface = value;
396 case OPT_Wline_truncation:
397 gfc_option.warn_line_truncation = value;
400 case OPT_Wsurprising:
401 gfc_option.warn_surprising = value;
405 gfc_option.warn_tabs = value;
409 gfc_option.warn_underflow = value;
412 case OPT_Wunused_labels:
413 gfc_option.warn_unused_labels = value;
416 case OPT_fcray_pointer:
417 gfc_option.flag_cray_pointer = value;
421 gfc_option.flag_f2c = value;
425 gfc_option.flag_dollar_ok = value;
429 gfc_option.flag_automatic = value;
433 gfc_option.flag_backslash = value;
436 case OPT_fd_lines_as_code:
437 gfc_option.flag_d_lines = 1;
440 case OPT_fd_lines_as_comments:
441 gfc_option.flag_d_lines = 0;
444 case OPT_fdump_parse_tree:
445 gfc_option.verbose = value;
448 case OPT_ffixed_form:
449 gfc_option.source_form = FORM_FIXED;
452 case OPT_ffixed_line_length_none:
453 gfc_option.fixed_line_length = 0;
456 case OPT_ffixed_line_length_:
457 if (value != 0 && value < 7)
458 gfc_fatal_error ("Fixed line length must be at least seven.");
459 gfc_option.fixed_line_length = value;
463 gfc_option.source_form = FORM_FREE;
467 gfc_option.flag_openmp = value;
470 case OPT_ffree_line_length_none:
471 gfc_option.free_line_length = 0;
474 case OPT_ffree_line_length_:
475 gfc_option.free_line_length = value;
478 case OPT_funderscoring:
479 gfc_option.flag_underscoring = value;
482 case OPT_fsecond_underscore:
483 gfc_option.flag_second_underscore = value;
486 case OPT_fimplicit_none:
487 gfc_option.flag_implicit_none = value;
490 case OPT_fmax_stack_var_size_:
491 gfc_option.flag_max_stack_var_size = value;
494 case OPT_fmodule_private:
495 gfc_option.flag_module_access_private = value;
498 case OPT_fno_backend:
499 gfc_option.flag_no_backend = value;
502 case OPT_fpack_derived:
503 gfc_option.flag_pack_derived = value;
506 case OPT_frepack_arrays:
507 gfc_option.flag_repack_arrays = value;
510 case OPT_fpreprocessed:
511 gfc_option.flag_preprocessed = value;
514 case OPT_fmax_identifier_length_:
515 if (value > GFC_MAX_SYMBOL_LEN)
516 gfc_fatal_error ("Maximum supported idenitifier length is %d",
518 gfc_option.max_identifier_length = value;
522 if (gfc_validate_kind (BT_REAL, value, true) < 0)
523 gfc_fatal_error ("Argument to -fqkind isn't a valid real kind");
524 gfc_option.q_kind = value;
527 case OPT_fdefault_integer_8:
528 gfc_option.flag_default_integer = value;
531 case OPT_fdefault_real_8:
532 gfc_option.flag_default_real = value;
535 case OPT_fdefault_double_8:
536 gfc_option.flag_default_double = value;
540 gfc_add_include_path (arg);
545 gfc_handle_module_path_options (arg);
549 gfc_handle_fpe_trap_option (arg);
553 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95 | GFC_STD_F77;
554 gfc_option.warn_std = GFC_STD_F95_OBS;
555 gfc_option.max_identifier_length = 31;
556 gfc_option.warn_tabs = 0;
560 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
561 | GFC_STD_F2003 | GFC_STD_F95;
562 gfc_option.warn_std = GFC_STD_F95_OBS;
563 gfc_option.max_identifier_length = 63;
567 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
568 | GFC_STD_F77 | GFC_STD_F95 | GFC_STD_F2003
569 | GFC_STD_GNU | GFC_STD_LEGACY;
570 gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
575 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
576 | GFC_STD_F77 | GFC_STD_F95 | GFC_STD_F2003
577 | GFC_STD_GNU | GFC_STD_LEGACY;
578 gfc_option.warn_std = 0;
581 case OPT_Wnonstd_intrinsics:
582 gfc_option.warn_nonstd_intrinsics = 1;
585 case OPT_fshort_enums:
586 gfc_option.fshort_enums = 1;
589 case OPT_fconvert_little_endian:
590 gfc_option.convert = CONVERT_LITTLE;
593 case OPT_fconvert_big_endian:
594 gfc_option.convert = CONVERT_BIG;
597 case OPT_fconvert_native:
598 gfc_option.convert = CONVERT_NATIVE;
601 case OPT_fconvert_swap:
602 gfc_option.convert = CONVERT_SWAP;