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;
146 }; /* sentinel value */
148 gfc_source_form f_form;
152 /* Find end of file name. Note, filename is either a NULL pointer or
153 a NUL terminated string. */
155 while (filename[i] != '\0')
158 /* Find last period. */
159 while (i >= 0 && (filename[i] != '.'))
162 /* Did we see a file extension? */
164 return FORM_UNKNOWN; /* Nope */
166 /* Get file extension and compare it to others. */
167 fileext = &(filename[i]);
170 f_form = FORM_UNKNOWN;
174 if (strcasecmp (fileext, exttype[i].extension) == 0)
176 f_form = exttype[i].form;
180 while (exttype[i].form != FORM_UNKNOWN);
186 /* Finalize commandline options. */
189 gfc_post_options (const char **pfilename)
191 const char *filename = *pfilename, *canon_source_file = NULL;
195 /* Verify the input file name. */
196 if (!filename || strcmp (filename, "-") == 0)
201 if (gfc_option.flag_preprocessed)
203 /* For preprocessed files, if the first tokens are of the form # NUM.
204 handle the directives so we know the original file name. */
205 gfc_source_file = gfc_read_orig_filename (filename, &canon_source_file);
206 if (gfc_source_file == NULL)
207 gfc_source_file = filename;
209 *pfilename = gfc_source_file;
212 gfc_source_file = filename;
214 if (canon_source_file == NULL)
215 canon_source_file = gfc_source_file;
217 /* Adds the path where the source file is to the list of include files. */
219 i = strlen (canon_source_file);
220 while (i > 0 && !IS_DIR_SEPARATOR (canon_source_file[i]))
225 source_path = alloca (i + 1);
226 memcpy (source_path, canon_source_file, i);
228 gfc_add_include_path (source_path, true);
231 gfc_add_include_path (".", true);
233 if (canon_source_file != gfc_source_file)
234 gfc_free ((void *) canon_source_file);
236 /* Decide which form the file will be read in as. */
238 if (gfc_option.source_form != FORM_UNKNOWN)
239 gfc_current_form = gfc_option.source_form;
242 gfc_current_form = form_from_filename (filename);
244 if (gfc_current_form == FORM_UNKNOWN)
246 gfc_current_form = FORM_FREE;
247 gfc_warning_now ("Reading file '%s' as free form",
248 (filename[0] == '\0') ? "<stdin>" : filename);
252 /* If the user specified -fd-lines-as-{code|comments} verify that we're
254 if (gfc_current_form == FORM_FREE)
256 if (gfc_option.flag_d_lines == 0)
257 gfc_warning_now ("'-fd-lines-as-comments' has no effect "
259 else if (gfc_option.flag_d_lines == 1)
260 gfc_warning_now ("'-fd-lines-as-code' has no effect in free form");
263 flag_inline_trees = 1;
265 /* Use tree inlining. */
268 if (flag_inline_functions)
269 flag_inline_trees = 2;
271 /* If -pedantic, warn about the use of GNU extensions. */
272 if (pedantic && (gfc_option.allow_std & GFC_STD_GNU) != 0)
273 gfc_option.warn_std |= GFC_STD_GNU;
274 /* -std=legacy -pedantic is effectively -std=gnu. */
275 if (pedantic && (gfc_option.allow_std & GFC_STD_LEGACY) != 0)
276 gfc_option.warn_std |= GFC_STD_F95_OBS | GFC_STD_F95_DEL | GFC_STD_LEGACY;
278 /* If the user didn't explicitly specify -f(no)-second-underscore we
279 use it if we're trying to be compatible with f2c, and not
281 if (gfc_option.flag_second_underscore == -1)
282 gfc_option.flag_second_underscore = gfc_option.flag_f2c;
284 /* Implement -fno-automatic as -fmax-stack-var-size=0. */
285 if (!gfc_option.flag_automatic)
286 gfc_option.flag_max_stack_var_size = 0;
289 gfc_option.warn_ampersand = 1;
291 if (gfc_option.flag_all_intrinsics)
292 gfc_option.warn_nonstd_intrinsics = 0;
298 /* Set the options for -Wall. */
301 set_Wall (int setting)
303 gfc_option.warn_aliasing = setting;
304 gfc_option.warn_ampersand = setting;
305 gfc_option.warn_line_truncation = setting;
306 gfc_option.warn_nonstd_intrinsics = setting;
307 gfc_option.warn_surprising = setting;
308 gfc_option.warn_tabs = !setting;
309 gfc_option.warn_underflow = setting;
310 gfc_option.warn_character_truncation = setting;
312 set_Wunused (setting);
313 warn_return_type = setting;
314 warn_switch = setting;
316 /* We save the value of warn_uninitialized, since if they put
317 -Wuninitialized on the command line, we need to generate a
318 warning about not using it without also specifying -O. */
320 warn_uninitialized = 0;
321 else if (warn_uninitialized != 1)
322 warn_uninitialized = 2;
327 gfc_handle_module_path_options (const char *arg)
330 if (gfc_option.module_dir != NULL)
332 gfc_status ("gfortran: Only one -M option allowed\n");
338 gfc_status ("gfortran: Directory required after -M\n");
342 gfc_option.module_dir = (char *) gfc_getmem (strlen (arg) + 2);
343 strcpy (gfc_option.module_dir, arg);
344 strcat (gfc_option.module_dir, "/");
346 gfc_add_include_path (gfc_option.module_dir, true);
351 gfc_handle_fpe_trap_option (const char *arg)
353 int result, pos = 0, n;
354 static const char * const exception[] = { "invalid", "denormal", "zero",
355 "overflow", "underflow",
357 static const int opt_exception[] = { GFC_FPE_INVALID, GFC_FPE_DENORMAL,
358 GFC_FPE_ZERO, GFC_FPE_OVERFLOW,
359 GFC_FPE_UNDERFLOW, GFC_FPE_PRECISION,
367 while (arg[pos] && arg[pos] != ',')
371 for (n = 0; exception[n] != NULL; n++)
373 if (exception[n] && strncmp (exception[n], arg, pos) == 0)
375 gfc_option.fpe |= opt_exception[n];
383 gfc_fatal_error ("Argument to -ffpe-trap is not valid: %s", arg);
388 /* Handle command-line options. Returns 0 if unrecognized, 1 if
389 recognized and handled. */
392 gfc_handle_option (size_t scode, const char *arg, int value)
395 enum opt_code code = (enum opt_code) scode;
397 /* Ignore file names. */
412 gfc_option.warn_aliasing = value;
416 gfc_option.warn_ampersand = value;
419 case OPT_Wcharacter_truncation:
420 gfc_option.warn_character_truncation = value;
423 case OPT_Wconversion:
424 gfc_option.warn_conversion = value;
427 case OPT_Wimplicit_interface:
428 gfc_option.warn_implicit_interface = value;
431 case OPT_Wline_truncation:
432 gfc_option.warn_line_truncation = value;
435 case OPT_Wsurprising:
436 gfc_option.warn_surprising = value;
440 gfc_option.warn_tabs = value;
444 gfc_option.warn_underflow = value;
447 case OPT_fall_intrinsics:
448 gfc_option.flag_all_intrinsics = 1;
452 gfc_option.flag_automatic = value;
455 case OPT_fallow_leading_underscore:
456 gfc_option.flag_allow_leading_underscore = value;
460 gfc_option.flag_backslash = value;
464 gfc_option.flag_dump_core = value;
467 case OPT_fcray_pointer:
468 gfc_option.flag_cray_pointer = value;
472 gfc_option.flag_f2c = value;
476 gfc_option.flag_dollar_ok = value;
479 case OPT_fexternal_blas:
480 gfc_option.flag_external_blas = value;
483 case OPT_fblas_matmul_limit_:
484 gfc_option.blas_matmul_limit = value;
487 case OPT_fd_lines_as_code:
488 gfc_option.flag_d_lines = 1;
491 case OPT_fd_lines_as_comments:
492 gfc_option.flag_d_lines = 0;
495 case OPT_fdump_parse_tree:
496 gfc_option.verbose = value;
499 case OPT_ffixed_form:
500 gfc_option.source_form = FORM_FIXED;
503 case OPT_ffixed_line_length_none:
504 gfc_option.fixed_line_length = 0;
507 case OPT_ffixed_line_length_:
508 if (value != 0 && value < 7)
509 gfc_fatal_error ("Fixed line length must be at least seven.");
510 gfc_option.fixed_line_length = value;
514 gfc_option.source_form = FORM_FREE;
518 gfc_option.flag_openmp = value;
521 case OPT_ffree_line_length_none:
522 gfc_option.free_line_length = 0;
525 case OPT_ffree_line_length_:
526 gfc_option.free_line_length = value;
529 case OPT_funderscoring:
530 gfc_option.flag_underscoring = value;
533 case OPT_fsecond_underscore:
534 gfc_option.flag_second_underscore = value;
537 case OPT_fimplicit_none:
538 gfc_option.flag_implicit_none = value;
541 case OPT_fintrinsic_modules_path:
542 gfc_add_include_path (arg, false);
543 gfc_add_intrinsic_modules_path (arg);
546 case OPT_fmax_errors_:
547 gfc_option.max_errors = value;
550 case OPT_fmax_stack_var_size_:
551 gfc_option.flag_max_stack_var_size = value;
554 case OPT_frange_check:
555 gfc_option.flag_range_check = value;
558 case OPT_fpack_derived:
559 gfc_option.flag_pack_derived = value;
562 case OPT_frepack_arrays:
563 gfc_option.flag_repack_arrays = value;
566 case OPT_fpreprocessed:
567 gfc_option.flag_preprocessed = value;
570 case OPT_fmax_identifier_length_:
571 if (value > GFC_MAX_SYMBOL_LEN)
572 gfc_fatal_error ("Maximum supported identifier length is %d",
574 gfc_option.max_identifier_length = value;
577 case OPT_fdefault_integer_8:
578 gfc_option.flag_default_integer = value;
581 case OPT_fdefault_real_8:
582 gfc_option.flag_default_real = value;
585 case OPT_fdefault_double_8:
586 gfc_option.flag_default_double = value;
590 gfc_add_include_path (arg, true);
595 gfc_handle_module_path_options (arg);
599 gfc_handle_fpe_trap_option (arg);
603 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95 | GFC_STD_F77;
604 gfc_option.warn_std = GFC_STD_F95_OBS;
605 gfc_option.max_identifier_length = 31;
606 gfc_option.warn_ampersand = 1;
607 gfc_option.warn_tabs = 0;
611 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
612 | GFC_STD_F2003 | GFC_STD_F95;
613 gfc_option.warn_std = GFC_STD_F95_OBS;
614 gfc_option.max_continue_fixed = 255;
615 gfc_option.max_continue_free = 255;
616 gfc_option.max_identifier_length = 63;
617 gfc_option.warn_ampersand = 1;
621 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
622 | GFC_STD_F77 | GFC_STD_F95 | GFC_STD_F2003
623 | GFC_STD_GNU | GFC_STD_LEGACY;
624 gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
629 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
630 | GFC_STD_F77 | GFC_STD_F95 | GFC_STD_F2003
631 | GFC_STD_GNU | GFC_STD_LEGACY;
632 gfc_option.warn_std = 0;
635 case OPT_Wnonstd_intrinsics:
636 gfc_option.warn_nonstd_intrinsics = value;
639 case OPT_fshort_enums:
640 gfc_option.fshort_enums = 1;
643 case OPT_fconvert_little_endian:
644 gfc_option.convert = CONVERT_LITTLE;
647 case OPT_fconvert_big_endian:
648 gfc_option.convert = CONVERT_BIG;
651 case OPT_fconvert_native:
652 gfc_option.convert = CONVERT_NATIVE;
655 case OPT_fconvert_swap:
656 gfc_option.convert = CONVERT_SWAP;
659 case OPT_frecord_marker_4:
660 gfc_option.record_marker = 4;
663 case OPT_frecord_marker_8:
664 gfc_option.record_marker = 8;
667 case OPT_fmax_subrecord_length_:
668 if (value > MAX_SUBRECORD_LENGTH)
669 gfc_fatal_error ("Maximum subrecord length cannot exceed %d",
670 MAX_SUBRECORD_LENGTH);
672 gfc_option.max_subrecord_length = value;