1 /* Parse and display command line options.
2 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
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
25 #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.free_line_length = 132;
50 gfc_option.max_continue_fixed = 19;
51 gfc_option.max_continue_free = 39;
52 gfc_option.max_identifier_length = GFC_MAX_SYMBOL_LEN;
53 gfc_option.max_subrecord_length = 0;
54 gfc_option.convert = CONVERT_NATIVE;
55 gfc_option.record_marker = 0;
56 gfc_option.verbose = 0;
58 gfc_option.warn_aliasing = 0;
59 gfc_option.warn_ampersand = 0;
60 gfc_option.warn_character_truncation = 0;
61 gfc_option.warn_conversion = 0;
62 gfc_option.warn_implicit_interface = 0;
63 gfc_option.warn_line_truncation = 0;
64 gfc_option.warn_surprising = 0;
65 gfc_option.warn_tabs = 1;
66 gfc_option.warn_underflow = 1;
67 gfc_option.max_errors = 25;
69 gfc_option.flag_all_intrinsics = 0;
70 gfc_option.flag_default_double = 0;
71 gfc_option.flag_default_integer = 0;
72 gfc_option.flag_default_real = 0;
73 gfc_option.flag_dollar_ok = 0;
74 gfc_option.flag_underscoring = 1;
75 gfc_option.flag_f2c = 0;
76 gfc_option.flag_second_underscore = -1;
77 gfc_option.flag_implicit_none = 0;
78 gfc_option.flag_max_stack_var_size = 32768;
79 gfc_option.flag_range_check = 1;
80 gfc_option.flag_pack_derived = 0;
81 gfc_option.flag_repack_arrays = 0;
82 gfc_option.flag_preprocessed = 0;
83 gfc_option.flag_automatic = 1;
84 gfc_option.flag_backslash = 1;
85 gfc_option.flag_allow_leading_underscore = 0;
86 gfc_option.flag_dump_core = 0;
87 gfc_option.flag_external_blas = 0;
88 gfc_option.blas_matmul_limit = 30;
89 gfc_option.flag_cray_pointer = 0;
90 gfc_option.flag_d_lines = -1;
91 gfc_option.flag_openmp = 0;
95 /* Argument pointers cannot point to anything but their argument. */
96 flag_argument_noalias = 3;
100 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
101 | GFC_STD_F2003 | GFC_STD_F95 | GFC_STD_F77 | GFC_STD_GNU
103 gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
106 gfc_option.warn_nonstd_intrinsics = 0;
108 /* -fshort-enums can be default on some targets. */
109 gfc_option.fshort_enums = targetm.default_short_enums ();
111 /* Increase MAX_ALIASED_VOPS to account for different characteristics
112 of Fortran regarding VOPs. */
113 MAX_ALIASED_VOPS = 50;
119 /* Determine the source form from the filename extension. We assume
120 case insensitivity. */
122 static gfc_source_form
123 form_from_filename (const char *filename)
127 const char *extension;
128 gfc_source_form form;
149 }; /* sentinel value */
151 gfc_source_form f_form;
155 /* Find end of file name. Note, filename is either a NULL pointer or
156 a NUL terminated string. */
158 while (filename[i] != '\0')
161 /* Find last period. */
162 while (i >= 0 && (filename[i] != '.'))
165 /* Did we see a file extension? */
167 return FORM_UNKNOWN; /* Nope */
169 /* Get file extension and compare it to others. */
170 fileext = &(filename[i]);
173 f_form = FORM_UNKNOWN;
177 if (strcasecmp (fileext, exttype[i].extension) == 0)
179 f_form = exttype[i].form;
183 while (exttype[i].form != FORM_UNKNOWN);
189 /* Finalize commandline options. */
192 gfc_post_options (const char **pfilename)
194 const char *filename = *pfilename, *canon_source_file = NULL;
198 /* Verify the input file name. */
199 if (!filename || strcmp (filename, "-") == 0)
204 if (gfc_option.flag_preprocessed)
206 /* For preprocessed files, if the first tokens are of the form # NUM.
207 handle the directives so we know the original file name. */
208 gfc_source_file = gfc_read_orig_filename (filename, &canon_source_file);
209 if (gfc_source_file == NULL)
210 gfc_source_file = filename;
212 *pfilename = gfc_source_file;
215 gfc_source_file = filename;
217 if (canon_source_file == NULL)
218 canon_source_file = gfc_source_file;
220 /* Adds the path where the source file is to the list of include files. */
222 i = strlen (canon_source_file);
223 while (i > 0 && !IS_DIR_SEPARATOR (canon_source_file[i]))
228 source_path = alloca (i + 1);
229 memcpy (source_path, canon_source_file, i);
231 gfc_add_include_path (source_path, true);
234 gfc_add_include_path (".", true);
236 if (canon_source_file != gfc_source_file)
237 gfc_free ((void *) canon_source_file);
239 /* Decide which form the file will be read in as. */
241 if (gfc_option.source_form != FORM_UNKNOWN)
242 gfc_current_form = gfc_option.source_form;
245 gfc_current_form = form_from_filename (filename);
247 if (gfc_current_form == FORM_UNKNOWN)
249 gfc_current_form = FORM_FREE;
250 gfc_warning_now ("Reading file '%s' as free form",
251 (filename[0] == '\0') ? "<stdin>" : filename);
255 /* If the user specified -fd-lines-as-{code|comments} verify that we're
257 if (gfc_current_form == FORM_FREE)
259 if (gfc_option.flag_d_lines == 0)
260 gfc_warning_now ("'-fd-lines-as-comments' has no effect "
262 else if (gfc_option.flag_d_lines == 1)
263 gfc_warning_now ("'-fd-lines-as-code' has no effect in free form");
266 flag_inline_trees = 1;
268 /* Use tree inlining. */
271 if (flag_inline_functions)
272 flag_inline_trees = 2;
274 /* If -pedantic, warn about the use of GNU extensions. */
275 if (pedantic && (gfc_option.allow_std & GFC_STD_GNU) != 0)
276 gfc_option.warn_std |= GFC_STD_GNU;
277 /* -std=legacy -pedantic is effectively -std=gnu. */
278 if (pedantic && (gfc_option.allow_std & GFC_STD_LEGACY) != 0)
279 gfc_option.warn_std |= GFC_STD_F95_OBS | GFC_STD_F95_DEL | GFC_STD_LEGACY;
281 /* If the user didn't explicitly specify -f(no)-second-underscore we
282 use it if we're trying to be compatible with f2c, and not
284 if (gfc_option.flag_second_underscore == -1)
285 gfc_option.flag_second_underscore = gfc_option.flag_f2c;
287 /* Implement -fno-automatic as -fmax-stack-var-size=0. */
288 if (!gfc_option.flag_automatic)
289 gfc_option.flag_max_stack_var_size = 0;
293 gfc_option.warn_ampersand = 1;
294 gfc_option.warn_tabs = 0;
297 if (gfc_option.flag_all_intrinsics)
298 gfc_option.warn_nonstd_intrinsics = 0;
304 /* Set the options for -Wall. */
307 set_Wall (int setting)
309 gfc_option.warn_aliasing = setting;
310 gfc_option.warn_ampersand = setting;
311 gfc_option.warn_line_truncation = setting;
312 gfc_option.warn_nonstd_intrinsics = setting;
313 gfc_option.warn_surprising = setting;
314 gfc_option.warn_tabs = !setting;
315 gfc_option.warn_underflow = setting;
316 gfc_option.warn_character_truncation = setting;
318 set_Wunused (setting);
319 warn_return_type = setting;
320 warn_switch = setting;
322 /* We save the value of warn_uninitialized, since if they put
323 -Wuninitialized on the command line, we need to generate a
324 warning about not using it without also specifying -O. */
326 warn_uninitialized = 0;
327 else if (warn_uninitialized != 1)
328 warn_uninitialized = 2;
333 gfc_handle_module_path_options (const char *arg)
336 if (gfc_option.module_dir != NULL)
338 gfc_status ("gfortran: Only one -M option allowed\n");
344 gfc_status ("gfortran: Directory required after -M\n");
348 gfc_option.module_dir = (char *) gfc_getmem (strlen (arg) + 2);
349 strcpy (gfc_option.module_dir, arg);
350 strcat (gfc_option.module_dir, "/");
352 gfc_add_include_path (gfc_option.module_dir, true);
357 gfc_handle_fpe_trap_option (const char *arg)
359 int result, pos = 0, n;
360 static const char * const exception[] = { "invalid", "denormal", "zero",
361 "overflow", "underflow",
363 static const int opt_exception[] = { GFC_FPE_INVALID, GFC_FPE_DENORMAL,
364 GFC_FPE_ZERO, GFC_FPE_OVERFLOW,
365 GFC_FPE_UNDERFLOW, GFC_FPE_PRECISION,
373 while (arg[pos] && arg[pos] != ',')
377 for (n = 0; exception[n] != NULL; n++)
379 if (exception[n] && strncmp (exception[n], arg, pos) == 0)
381 gfc_option.fpe |= opt_exception[n];
389 gfc_fatal_error ("Argument to -ffpe-trap is not valid: %s", arg);
394 /* Handle command-line options. Returns 0 if unrecognized, 1 if
395 recognized and handled. */
398 gfc_handle_option (size_t scode, const char *arg, int value)
401 enum opt_code code = (enum opt_code) scode;
403 /* Ignore file names. */
418 gfc_option.warn_aliasing = value;
422 gfc_option.warn_ampersand = value;
425 case OPT_Wcharacter_truncation:
426 gfc_option.warn_character_truncation = value;
429 case OPT_Wconversion:
430 gfc_option.warn_conversion = value;
433 case OPT_Wimplicit_interface:
434 gfc_option.warn_implicit_interface = value;
437 case OPT_Wline_truncation:
438 gfc_option.warn_line_truncation = value;
441 case OPT_Wsurprising:
442 gfc_option.warn_surprising = value;
446 gfc_option.warn_tabs = value;
450 gfc_option.warn_underflow = value;
453 case OPT_fall_intrinsics:
454 gfc_option.flag_all_intrinsics = 1;
458 gfc_option.flag_automatic = value;
461 case OPT_fallow_leading_underscore:
462 gfc_option.flag_allow_leading_underscore = value;
466 gfc_option.flag_backslash = value;
470 gfc_option.flag_dump_core = value;
473 case OPT_fcray_pointer:
474 gfc_option.flag_cray_pointer = value;
478 gfc_option.flag_f2c = value;
482 gfc_option.flag_dollar_ok = value;
485 case OPT_fexternal_blas:
486 gfc_option.flag_external_blas = value;
489 case OPT_fblas_matmul_limit_:
490 gfc_option.blas_matmul_limit = value;
493 case OPT_fd_lines_as_code:
494 gfc_option.flag_d_lines = 1;
497 case OPT_fd_lines_as_comments:
498 gfc_option.flag_d_lines = 0;
501 case OPT_fdump_parse_tree:
502 gfc_option.verbose = value;
505 case OPT_ffixed_form:
506 gfc_option.source_form = FORM_FIXED;
509 case OPT_ffixed_line_length_none:
510 gfc_option.fixed_line_length = 0;
513 case OPT_ffixed_line_length_:
514 if (value != 0 && value < 7)
515 gfc_fatal_error ("Fixed line length must be at least seven.");
516 gfc_option.fixed_line_length = value;
520 gfc_option.source_form = FORM_FREE;
524 gfc_option.flag_openmp = value;
527 case OPT_ffree_line_length_none:
528 gfc_option.free_line_length = 0;
531 case OPT_ffree_line_length_:
532 gfc_option.free_line_length = value;
535 case OPT_funderscoring:
536 gfc_option.flag_underscoring = value;
539 case OPT_fsecond_underscore:
540 gfc_option.flag_second_underscore = value;
543 case OPT_fimplicit_none:
544 gfc_option.flag_implicit_none = value;
547 case OPT_fintrinsic_modules_path:
548 gfc_add_include_path (arg, false);
549 gfc_add_intrinsic_modules_path (arg);
552 case OPT_fmax_errors_:
553 gfc_option.max_errors = value;
556 case OPT_fmax_stack_var_size_:
557 gfc_option.flag_max_stack_var_size = value;
560 case OPT_frange_check:
561 gfc_option.flag_range_check = value;
564 case OPT_fpack_derived:
565 gfc_option.flag_pack_derived = value;
568 case OPT_frepack_arrays:
569 gfc_option.flag_repack_arrays = value;
572 case OPT_fpreprocessed:
573 gfc_option.flag_preprocessed = value;
576 case OPT_fmax_identifier_length_:
577 if (value > GFC_MAX_SYMBOL_LEN)
578 gfc_fatal_error ("Maximum supported identifier length is %d",
580 gfc_option.max_identifier_length = value;
583 case OPT_fdefault_integer_8:
584 gfc_option.flag_default_integer = value;
587 case OPT_fdefault_real_8:
588 gfc_option.flag_default_real = value;
591 case OPT_fdefault_double_8:
592 gfc_option.flag_default_double = value;
596 gfc_add_include_path (arg, true);
601 gfc_handle_module_path_options (arg);
605 gfc_handle_fpe_trap_option (arg);
609 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95 | GFC_STD_F77;
610 gfc_option.warn_std = GFC_STD_F95_OBS;
611 gfc_option.max_identifier_length = 31;
612 gfc_option.warn_ampersand = 1;
613 gfc_option.warn_tabs = 0;
617 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
618 | GFC_STD_F2003 | GFC_STD_F95;
619 gfc_option.warn_std = GFC_STD_F95_OBS;
620 gfc_option.max_continue_fixed = 255;
621 gfc_option.max_continue_free = 255;
622 gfc_option.max_identifier_length = 63;
623 gfc_option.warn_ampersand = 1;
624 gfc_option.warn_tabs = 0;
628 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
629 | GFC_STD_F77 | GFC_STD_F95 | GFC_STD_F2003
630 | GFC_STD_GNU | GFC_STD_LEGACY;
631 gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
636 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
637 | GFC_STD_F77 | GFC_STD_F95 | GFC_STD_F2003
638 | GFC_STD_GNU | GFC_STD_LEGACY;
639 gfc_option.warn_std = 0;
642 case OPT_Wnonstd_intrinsics:
643 gfc_option.warn_nonstd_intrinsics = value;
646 case OPT_fshort_enums:
647 gfc_option.fshort_enums = 1;
650 case OPT_fconvert_little_endian:
651 gfc_option.convert = CONVERT_LITTLE;
654 case OPT_fconvert_big_endian:
655 gfc_option.convert = CONVERT_BIG;
658 case OPT_fconvert_native:
659 gfc_option.convert = CONVERT_NATIVE;
662 case OPT_fconvert_swap:
663 gfc_option.convert = CONVERT_SWAP;
666 case OPT_frecord_marker_4:
667 gfc_option.record_marker = 4;
670 case OPT_frecord_marker_8:
671 gfc_option.record_marker = 8;
674 case OPT_fmax_subrecord_length_:
675 if (value > MAX_SUBRECORD_LENGTH)
676 gfc_fatal_error ("Maximum subrecord length cannot exceed %d",
677 MAX_SUBRECORD_LENGTH);
679 gfc_option.max_subrecord_length = value;