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 /* Set flags that control warnings and errors for different
40 Fortran standards to their default values. */
43 set_default_std_flags (void)
45 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
46 | GFC_STD_F2003 | GFC_STD_F95 | GFC_STD_F77 | GFC_STD_GNU
48 gfc_option.warn_std = GFC_STD_F95_DEL | GFC_STD_LEGACY;
51 /* Get ready for options handling. */
54 gfc_init_options (unsigned int argc ATTRIBUTE_UNUSED,
55 const char **argv ATTRIBUTE_UNUSED)
57 gfc_source_file = NULL;
58 gfc_option.module_dir = NULL;
59 gfc_option.source_form = FORM_UNKNOWN;
60 gfc_option.fixed_line_length = 72;
61 gfc_option.free_line_length = 132;
62 gfc_option.max_continue_fixed = 19;
63 gfc_option.max_continue_free = 39;
64 gfc_option.max_identifier_length = GFC_MAX_SYMBOL_LEN;
65 gfc_option.max_subrecord_length = 0;
66 gfc_option.convert = CONVERT_NATIVE;
67 gfc_option.record_marker = 0;
68 gfc_option.verbose = 0;
70 gfc_option.warn_aliasing = 0;
71 gfc_option.warn_ampersand = 0;
72 gfc_option.warn_character_truncation = 0;
73 gfc_option.warn_conversion = 0;
74 gfc_option.warn_implicit_interface = 0;
75 gfc_option.warn_line_truncation = 0;
76 gfc_option.warn_surprising = 0;
77 gfc_option.warn_tabs = 1;
78 gfc_option.warn_underflow = 1;
79 gfc_option.max_errors = 25;
81 gfc_option.flag_all_intrinsics = 0;
82 gfc_option.flag_default_double = 0;
83 gfc_option.flag_default_integer = 0;
84 gfc_option.flag_default_real = 0;
85 gfc_option.flag_dollar_ok = 0;
86 gfc_option.flag_underscoring = 1;
87 gfc_option.flag_f2c = 0;
88 gfc_option.flag_second_underscore = -1;
89 gfc_option.flag_implicit_none = 0;
90 gfc_option.flag_max_stack_var_size = 32768;
91 gfc_option.flag_range_check = 1;
92 gfc_option.flag_pack_derived = 0;
93 gfc_option.flag_repack_arrays = 0;
94 gfc_option.flag_preprocessed = 0;
95 gfc_option.flag_automatic = 1;
96 gfc_option.flag_backslash = 1;
97 gfc_option.flag_backtrace = 0;
98 gfc_option.flag_allow_leading_underscore = 0;
99 gfc_option.flag_dump_core = 0;
100 gfc_option.flag_external_blas = 0;
101 gfc_option.blas_matmul_limit = 30;
102 gfc_option.flag_cray_pointer = 0;
103 gfc_option.flag_d_lines = -1;
104 gfc_option.flag_openmp = 0;
108 /* Argument pointers cannot point to anything but their argument. */
109 flag_argument_noalias = 3;
113 set_default_std_flags ();
115 gfc_option.warn_nonstd_intrinsics = 0;
117 /* -fshort-enums can be default on some targets. */
118 gfc_option.fshort_enums = targetm.default_short_enums ();
120 /* Increase MAX_ALIASED_VOPS to account for different characteristics
121 of Fortran regarding VOPs. */
122 MAX_ALIASED_VOPS = 50;
128 /* Determine the source form from the filename extension. We assume
129 case insensitivity. */
131 static gfc_source_form
132 form_from_filename (const char *filename)
136 const char *extension;
137 gfc_source_form form;
158 }; /* sentinel value */
160 gfc_source_form f_form;
164 /* Find end of file name. Note, filename is either a NULL pointer or
165 a NUL terminated string. */
167 while (filename[i] != '\0')
170 /* Find last period. */
171 while (i >= 0 && (filename[i] != '.'))
174 /* Did we see a file extension? */
176 return FORM_UNKNOWN; /* Nope */
178 /* Get file extension and compare it to others. */
179 fileext = &(filename[i]);
182 f_form = FORM_UNKNOWN;
186 if (strcasecmp (fileext, exttype[i].extension) == 0)
188 f_form = exttype[i].form;
192 while (exttype[i].form != FORM_UNKNOWN);
198 /* Finalize commandline options. */
201 gfc_post_options (const char **pfilename)
203 const char *filename = *pfilename, *canon_source_file = NULL;
207 /* Verify the input file name. */
208 if (!filename || strcmp (filename, "-") == 0)
213 if (gfc_option.flag_preprocessed)
215 /* For preprocessed files, if the first tokens are of the form # NUM.
216 handle the directives so we know the original file name. */
217 gfc_source_file = gfc_read_orig_filename (filename, &canon_source_file);
218 if (gfc_source_file == NULL)
219 gfc_source_file = filename;
221 *pfilename = gfc_source_file;
224 gfc_source_file = filename;
226 if (canon_source_file == NULL)
227 canon_source_file = gfc_source_file;
229 /* Adds the path where the source file is to the list of include files. */
231 i = strlen (canon_source_file);
232 while (i > 0 && !IS_DIR_SEPARATOR (canon_source_file[i]))
237 source_path = alloca (i + 1);
238 memcpy (source_path, canon_source_file, i);
240 gfc_add_include_path (source_path, true);
243 gfc_add_include_path (".", true);
245 if (canon_source_file != gfc_source_file)
246 gfc_free ((void *) canon_source_file);
248 /* Decide which form the file will be read in as. */
250 if (gfc_option.source_form != FORM_UNKNOWN)
251 gfc_current_form = gfc_option.source_form;
254 gfc_current_form = form_from_filename (filename);
256 if (gfc_current_form == FORM_UNKNOWN)
258 gfc_current_form = FORM_FREE;
259 gfc_warning_now ("Reading file '%s' as free form",
260 (filename[0] == '\0') ? "<stdin>" : filename);
264 /* If the user specified -fd-lines-as-{code|comments} verify that we're
266 if (gfc_current_form == FORM_FREE)
268 if (gfc_option.flag_d_lines == 0)
269 gfc_warning_now ("'-fd-lines-as-comments' has no effect "
271 else if (gfc_option.flag_d_lines == 1)
272 gfc_warning_now ("'-fd-lines-as-code' has no effect in free form");
275 flag_inline_trees = 1;
277 /* Use tree inlining. */
280 if (flag_inline_functions)
281 flag_inline_trees = 2;
283 /* If -pedantic, warn about the use of GNU extensions. */
284 if (pedantic && (gfc_option.allow_std & GFC_STD_GNU) != 0)
285 gfc_option.warn_std |= GFC_STD_GNU;
286 /* -std=legacy -pedantic is effectively -std=gnu. */
287 if (pedantic && (gfc_option.allow_std & GFC_STD_LEGACY) != 0)
288 gfc_option.warn_std |= GFC_STD_F95_OBS | GFC_STD_F95_DEL | GFC_STD_LEGACY;
290 /* If the user didn't explicitly specify -f(no)-second-underscore we
291 use it if we're trying to be compatible with f2c, and not
293 if (gfc_option.flag_second_underscore == -1)
294 gfc_option.flag_second_underscore = gfc_option.flag_f2c;
296 /* Implement -fno-automatic as -fmax-stack-var-size=0. */
297 if (!gfc_option.flag_automatic)
298 gfc_option.flag_max_stack_var_size = 0;
302 gfc_option.warn_ampersand = 1;
303 gfc_option.warn_tabs = 0;
306 if (gfc_option.flag_all_intrinsics)
307 gfc_option.warn_nonstd_intrinsics = 0;
313 /* Set the options for -Wall. */
316 set_Wall (int setting)
318 gfc_option.warn_aliasing = setting;
319 gfc_option.warn_ampersand = setting;
320 gfc_option.warn_line_truncation = setting;
321 gfc_option.warn_nonstd_intrinsics = setting;
322 gfc_option.warn_surprising = setting;
323 gfc_option.warn_tabs = !setting;
324 gfc_option.warn_underflow = setting;
325 gfc_option.warn_character_truncation = setting;
327 set_Wunused (setting);
328 warn_return_type = setting;
329 warn_switch = setting;
331 /* We save the value of warn_uninitialized, since if they put
332 -Wuninitialized on the command line, we need to generate a
333 warning about not using it without also specifying -O. */
335 warn_uninitialized = 0;
336 else if (warn_uninitialized != 1)
337 warn_uninitialized = 2;
342 gfc_handle_module_path_options (const char *arg)
345 if (gfc_option.module_dir != NULL)
347 gfc_status ("gfortran: Only one -M option allowed\n");
353 gfc_status ("gfortran: Directory required after -M\n");
357 gfc_option.module_dir = (char *) gfc_getmem (strlen (arg) + 2);
358 strcpy (gfc_option.module_dir, arg);
359 strcat (gfc_option.module_dir, "/");
361 gfc_add_include_path (gfc_option.module_dir, true);
366 gfc_handle_fpe_trap_option (const char *arg)
368 int result, pos = 0, n;
369 static const char * const exception[] = { "invalid", "denormal", "zero",
370 "overflow", "underflow",
372 static const int opt_exception[] = { GFC_FPE_INVALID, GFC_FPE_DENORMAL,
373 GFC_FPE_ZERO, GFC_FPE_OVERFLOW,
374 GFC_FPE_UNDERFLOW, GFC_FPE_PRECISION,
382 while (arg[pos] && arg[pos] != ',')
386 for (n = 0; exception[n] != NULL; n++)
388 if (exception[n] && strncmp (exception[n], arg, pos) == 0)
390 gfc_option.fpe |= opt_exception[n];
398 gfc_fatal_error ("Argument to -ffpe-trap is not valid: %s", arg);
403 /* Handle command-line options. Returns 0 if unrecognized, 1 if
404 recognized and handled. */
407 gfc_handle_option (size_t scode, const char *arg, int value)
410 enum opt_code code = (enum opt_code) scode;
412 /* Ignore file names. */
427 gfc_option.warn_aliasing = value;
431 gfc_option.warn_ampersand = value;
434 case OPT_Wcharacter_truncation:
435 gfc_option.warn_character_truncation = value;
438 case OPT_Wconversion:
439 gfc_option.warn_conversion = value;
442 case OPT_Wimplicit_interface:
443 gfc_option.warn_implicit_interface = value;
446 case OPT_Wline_truncation:
447 gfc_option.warn_line_truncation = value;
450 case OPT_Wsurprising:
451 gfc_option.warn_surprising = value;
455 gfc_option.warn_tabs = value;
459 gfc_option.warn_underflow = value;
462 case OPT_fall_intrinsics:
463 gfc_option.flag_all_intrinsics = 1;
467 gfc_option.flag_automatic = value;
470 case OPT_fallow_leading_underscore:
471 gfc_option.flag_allow_leading_underscore = value;
475 gfc_option.flag_backslash = value;
479 gfc_option.flag_backtrace = value;
483 gfc_option.flag_dump_core = value;
486 case OPT_fcray_pointer:
487 gfc_option.flag_cray_pointer = value;
491 gfc_option.flag_f2c = value;
495 gfc_option.flag_dollar_ok = value;
498 case OPT_fexternal_blas:
499 gfc_option.flag_external_blas = value;
502 case OPT_fblas_matmul_limit_:
503 gfc_option.blas_matmul_limit = value;
506 case OPT_fd_lines_as_code:
507 gfc_option.flag_d_lines = 1;
510 case OPT_fd_lines_as_comments:
511 gfc_option.flag_d_lines = 0;
514 case OPT_fdump_parse_tree:
515 gfc_option.verbose = value;
518 case OPT_ffixed_form:
519 gfc_option.source_form = FORM_FIXED;
522 case OPT_ffixed_line_length_none:
523 gfc_option.fixed_line_length = 0;
526 case OPT_ffixed_line_length_:
527 if (value != 0 && value < 7)
528 gfc_fatal_error ("Fixed line length must be at least seven.");
529 gfc_option.fixed_line_length = value;
533 gfc_option.source_form = FORM_FREE;
537 gfc_option.flag_openmp = value;
540 case OPT_ffree_line_length_none:
541 gfc_option.free_line_length = 0;
544 case OPT_ffree_line_length_:
545 gfc_option.free_line_length = value;
548 case OPT_funderscoring:
549 gfc_option.flag_underscoring = value;
552 case OPT_fsecond_underscore:
553 gfc_option.flag_second_underscore = value;
556 case OPT_fimplicit_none:
557 gfc_option.flag_implicit_none = value;
560 case OPT_fintrinsic_modules_path:
561 gfc_add_include_path (arg, false);
562 gfc_add_intrinsic_modules_path (arg);
565 case OPT_fmax_errors_:
566 gfc_option.max_errors = value;
569 case OPT_fmax_stack_var_size_:
570 gfc_option.flag_max_stack_var_size = value;
573 case OPT_frange_check:
574 gfc_option.flag_range_check = value;
577 case OPT_fpack_derived:
578 gfc_option.flag_pack_derived = value;
581 case OPT_frepack_arrays:
582 gfc_option.flag_repack_arrays = value;
585 case OPT_fpreprocessed:
586 gfc_option.flag_preprocessed = value;
589 case OPT_fmax_identifier_length_:
590 if (value > GFC_MAX_SYMBOL_LEN)
591 gfc_fatal_error ("Maximum supported identifier length is %d",
593 gfc_option.max_identifier_length = value;
596 case OPT_fdefault_integer_8:
597 gfc_option.flag_default_integer = value;
600 case OPT_fdefault_real_8:
601 gfc_option.flag_default_real = value;
604 case OPT_fdefault_double_8:
605 gfc_option.flag_default_double = value;
609 gfc_add_include_path (arg, true);
614 gfc_handle_module_path_options (arg);
618 gfc_handle_fpe_trap_option (arg);
622 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95 | GFC_STD_F77;
623 gfc_option.warn_std = GFC_STD_F95_OBS;
624 gfc_option.max_identifier_length = 31;
625 gfc_option.warn_ampersand = 1;
626 gfc_option.warn_tabs = 0;
630 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
631 | GFC_STD_F2003 | GFC_STD_F95;
632 gfc_option.warn_std = GFC_STD_F95_OBS;
633 gfc_option.max_continue_fixed = 255;
634 gfc_option.max_continue_free = 255;
635 gfc_option.max_identifier_length = 63;
636 gfc_option.warn_ampersand = 1;
637 gfc_option.warn_tabs = 0;
641 set_default_std_flags ();
645 set_default_std_flags ();
646 gfc_option.warn_std = 0;
649 case OPT_Wnonstd_intrinsics:
650 gfc_option.warn_nonstd_intrinsics = value;
653 case OPT_fshort_enums:
654 gfc_option.fshort_enums = 1;
657 case OPT_fconvert_little_endian:
658 gfc_option.convert = CONVERT_LITTLE;
661 case OPT_fconvert_big_endian:
662 gfc_option.convert = CONVERT_BIG;
665 case OPT_fconvert_native:
666 gfc_option.convert = CONVERT_NATIVE;
669 case OPT_fconvert_swap:
670 gfc_option.convert = CONVERT_SWAP;
673 case OPT_frecord_marker_4:
674 gfc_option.record_marker = 4;
677 case OPT_frecord_marker_8:
678 gfc_option.record_marker = 8;
681 case OPT_fmax_subrecord_length_:
682 if (value > MAX_SUBRECORD_LENGTH)
683 gfc_fatal_error ("Maximum subrecord length cannot exceed %d",
684 MAX_SUBRECORD_LENGTH);
686 gfc_option.max_subrecord_length = value;