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 = 72;
50 gfc_option.free_line_length = 132;
51 gfc_option.max_continue_fixed = 19;
52 gfc_option.max_continue_free = 39;
53 gfc_option.max_identifier_length = GFC_MAX_SYMBOL_LEN;
54 gfc_option.verbose = 0;
56 gfc_option.warn_aliasing = 0;
57 gfc_option.warn_ampersand = 0;
58 gfc_option.warn_conversion = 0;
59 gfc_option.warn_implicit_interface = 0;
60 gfc_option.warn_line_truncation = 0;
61 gfc_option.warn_surprising = 0;
62 gfc_option.warn_tabs = 1;
63 gfc_option.warn_underflow = 1;
64 gfc_option.max_errors = 25;
66 gfc_option.flag_all_intrinsics = 0;
67 gfc_option.flag_default_double = 0;
68 gfc_option.flag_default_integer = 0;
69 gfc_option.flag_default_real = 0;
70 gfc_option.flag_dollar_ok = 0;
71 gfc_option.flag_underscoring = 1;
72 gfc_option.flag_f2c = 0;
73 gfc_option.flag_second_underscore = -1;
74 gfc_option.flag_implicit_none = 0;
75 gfc_option.flag_max_stack_var_size = 32768;
76 gfc_option.flag_range_check = 1;
77 gfc_option.flag_pack_derived = 0;
78 gfc_option.flag_repack_arrays = 0;
79 gfc_option.flag_preprocessed = 0;
80 gfc_option.flag_automatic = 1;
81 gfc_option.flag_backslash = 1;
82 gfc_option.flag_external_blas = 0;
83 gfc_option.blas_matmul_limit = 30;
84 gfc_option.flag_cray_pointer = 0;
85 gfc_option.flag_d_lines = -1;
86 gfc_option.flag_openmp = 0;
90 /* Argument pointers cannot point to anything
91 but their argument. */
92 flag_argument_noalias = 3;
96 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
97 | GFC_STD_F2003 | GFC_STD_F95 | GFC_STD_F77 | GFC_STD_GNU
99 gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
102 gfc_option.warn_nonstd_intrinsics = 0;
104 /* -fshort-enums can be default on some targets. */
105 gfc_option.fshort_enums = targetm.default_short_enums ();
111 /* Determine the source form from the filename extension. We assume
112 case insensitivity. */
114 static gfc_source_form
115 form_from_filename (const char *filename)
120 const char *extension;
121 gfc_source_form form;
139 }; /* sentinel value */
141 gfc_source_form f_form;
145 /* Find end of file name. Note, filename is either a NULL pointer or
146 a NUL terminated string. */
148 while (filename[i] != '\0')
151 /* Find last period. */
152 while (i >= 0 && (filename[i] != '.'))
155 /* Did we see a file extension? */
157 return FORM_UNKNOWN; /* Nope */
159 /* Get file extension and compare it to others. */
160 fileext = &(filename[i]);
163 f_form = FORM_UNKNOWN;
167 if (strcasecmp (fileext, exttype[i].extension) == 0)
169 f_form = exttype[i].form;
173 while (exttype[i].form != FORM_UNKNOWN);
179 /* Finalize commandline options. */
182 gfc_post_options (const char **pfilename)
184 const char *filename = *pfilename, *canon_source_file = NULL;
188 /* Verify the input file name. */
189 if (!filename || strcmp (filename, "-") == 0)
194 if (gfc_option.flag_preprocessed)
196 /* For preprocessed files, if the first tokens are of the form # NUM.
197 handle the directives so we know the original file name. */
198 gfc_source_file = gfc_read_orig_filename (filename, &canon_source_file);
199 if (gfc_source_file == NULL)
200 gfc_source_file = filename;
202 *pfilename = gfc_source_file;
205 gfc_source_file = filename;
207 if (canon_source_file == NULL)
208 canon_source_file = gfc_source_file;
210 /* Adds the path where the source file is to the list of include files. */
212 i = strlen (canon_source_file);
213 while (i > 0 && !IS_DIR_SEPARATOR (canon_source_file[i]))
217 source_path = alloca (i + 1);
218 memcpy (source_path, canon_source_file, i);
220 gfc_add_include_path (source_path);
223 gfc_add_include_path (".");
225 if (canon_source_file != gfc_source_file)
226 gfc_free ((void *) canon_source_file);
228 /* Decide which form the file will be read in as. */
230 if (gfc_option.source_form != FORM_UNKNOWN)
231 gfc_current_form = gfc_option.source_form;
234 gfc_current_form = form_from_filename (filename);
236 if (gfc_current_form == FORM_UNKNOWN)
238 gfc_current_form = FORM_FREE;
239 gfc_warning_now ("Reading file '%s' as free form.",
240 (filename[0] == '\0') ? "<stdin>" : filename);
244 /* If the user specified -fd-lines-as-{code|comments} verify that we're
246 if (gfc_current_form == FORM_FREE)
248 if (gfc_option.flag_d_lines == 0)
249 gfc_warning_now ("'-fd-lines-as-comments' has no effect "
251 else if (gfc_option.flag_d_lines == 1)
252 gfc_warning_now ("'-fd-lines-as-code' has no effect "
256 flag_inline_trees = 1;
258 /* Use tree inlining. */
261 if (flag_inline_functions)
262 flag_inline_trees = 2;
264 /* If -pedantic, warn about the use of GNU extensions. */
265 if (pedantic && (gfc_option.allow_std & GFC_STD_GNU) != 0)
266 gfc_option.warn_std |= GFC_STD_GNU;
267 /* -std=legacy -pedantic is effectively -std=gnu. */
268 if (pedantic && (gfc_option.allow_std & GFC_STD_LEGACY) != 0)
269 gfc_option.warn_std |= GFC_STD_F95_OBS | GFC_STD_F95_DEL | GFC_STD_LEGACY;
271 /* If the user didn't explicitly specify -f(no)-second-underscore we
272 use it if we're trying to be compatible with f2c, and not
274 if (gfc_option.flag_second_underscore == -1)
275 gfc_option.flag_second_underscore = gfc_option.flag_f2c;
277 /* Implement -fno-automatic as -fmax-stack-var-size=0. */
278 if (!gfc_option.flag_automatic)
279 gfc_option.flag_max_stack_var_size = 0;
282 gfc_option.warn_ampersand = 1;
284 if (gfc_option.flag_all_intrinsics)
285 gfc_option.warn_nonstd_intrinsics = 0;
291 /* Set the options for -Wall. */
297 gfc_option.warn_aliasing = 1;
298 gfc_option.warn_ampersand = 1;
299 gfc_option.warn_line_truncation = 1;
300 gfc_option.warn_nonstd_intrinsics = 1;
301 gfc_option.warn_surprising = 1;
302 gfc_option.warn_tabs = 0;
303 gfc_option.warn_underflow = 1;
306 warn_return_type = 1;
309 /* We save the value of warn_uninitialized, since if they put
310 -Wuninitialized on the command line, we need to generate a
311 warning about not using it without also specifying -O. */
313 if (warn_uninitialized != 1)
314 warn_uninitialized = 2;
319 gfc_handle_module_path_options (const char *arg)
322 if (gfc_option.module_dir != NULL)
324 gfc_status ("gfortran: Only one -M option allowed\n");
330 gfc_status ("gfortran: Directory required after -M\n");
334 gfc_option.module_dir = (char *) gfc_getmem (strlen (arg) + 2);
335 strcpy (gfc_option.module_dir, arg);
336 strcat (gfc_option.module_dir, "/");
340 gfc_handle_fpe_trap_option (const char *arg)
342 int result, pos = 0, n;
343 static const char * const exception[] = { "invalid", "denormal", "zero",
344 "overflow", "underflow",
346 static const int opt_exception[] = { GFC_FPE_INVALID, GFC_FPE_DENORMAL,
347 GFC_FPE_ZERO, GFC_FPE_OVERFLOW,
348 GFC_FPE_UNDERFLOW, GFC_FPE_PRECISION,
355 while (arg[pos] && arg[pos] != ',')
358 for (n = 0; exception[n] != NULL; n++)
360 if (exception[n] && strncmp (exception[n], arg, pos) == 0)
362 gfc_option.fpe |= opt_exception[n];
370 gfc_fatal_error ("Argument to -ffpe-trap is not valid: %s", arg);
374 /* Handle command-line options. Returns 0 if unrecognized, 1 if
375 recognized and handled. */
377 gfc_handle_option (size_t scode, const char *arg, int value)
380 enum opt_code code = (enum opt_code) scode;
382 /* Ignore file names. */
397 gfc_option.warn_aliasing = value;
401 gfc_option.warn_ampersand = value;
404 case OPT_Wconversion:
405 gfc_option.warn_conversion = value;
408 case OPT_Wimplicit_interface:
409 gfc_option.warn_implicit_interface = value;
412 case OPT_Wline_truncation:
413 gfc_option.warn_line_truncation = value;
416 case OPT_Wsurprising:
417 gfc_option.warn_surprising = value;
421 gfc_option.warn_tabs = value;
425 gfc_option.warn_underflow = value;
428 case OPT_fall_intrinsics:
429 gfc_option.flag_all_intrinsics = 1;
433 gfc_option.flag_automatic = value;
437 gfc_option.flag_backslash = value;
440 case OPT_fcray_pointer:
441 gfc_option.flag_cray_pointer = value;
445 gfc_option.flag_f2c = value;
449 gfc_option.flag_dollar_ok = value;
452 case OPT_fexternal_blas:
453 gfc_option.flag_external_blas = value;
456 case OPT_fblas_matmul_limit_:
457 gfc_option.blas_matmul_limit = value;
460 case OPT_fd_lines_as_code:
461 gfc_option.flag_d_lines = 1;
464 case OPT_fd_lines_as_comments:
465 gfc_option.flag_d_lines = 0;
468 case OPT_fdump_parse_tree:
469 gfc_option.verbose = value;
472 case OPT_ffixed_form:
473 gfc_option.source_form = FORM_FIXED;
476 case OPT_ffixed_line_length_none:
477 gfc_option.fixed_line_length = 0;
480 case OPT_ffixed_line_length_:
481 if (value != 0 && value < 7)
482 gfc_fatal_error ("Fixed line length must be at least seven.");
483 gfc_option.fixed_line_length = value;
487 gfc_option.source_form = FORM_FREE;
491 gfc_option.flag_openmp = value;
494 case OPT_ffree_line_length_none:
495 gfc_option.free_line_length = 0;
498 case OPT_ffree_line_length_:
499 gfc_option.free_line_length = value;
502 case OPT_funderscoring:
503 gfc_option.flag_underscoring = value;
506 case OPT_fsecond_underscore:
507 gfc_option.flag_second_underscore = value;
510 case OPT_fimplicit_none:
511 gfc_option.flag_implicit_none = value;
514 case OPT_fmax_errors_:
515 gfc_option.max_errors = value;
518 case OPT_fmax_stack_var_size_:
519 gfc_option.flag_max_stack_var_size = value;
522 case OPT_frange_check:
523 gfc_option.flag_range_check = value;
526 case OPT_fpack_derived:
527 gfc_option.flag_pack_derived = value;
530 case OPT_frepack_arrays:
531 gfc_option.flag_repack_arrays = value;
534 case OPT_fpreprocessed:
535 gfc_option.flag_preprocessed = value;
538 case OPT_fmax_identifier_length_:
539 if (value > GFC_MAX_SYMBOL_LEN)
540 gfc_fatal_error ("Maximum supported identifier length is %d",
542 gfc_option.max_identifier_length = value;
545 case OPT_fdefault_integer_8:
546 gfc_option.flag_default_integer = value;
549 case OPT_fdefault_real_8:
550 gfc_option.flag_default_real = value;
553 case OPT_fdefault_double_8:
554 gfc_option.flag_default_double = value;
558 gfc_add_include_path (arg);
563 gfc_handle_module_path_options (arg);
567 gfc_handle_fpe_trap_option (arg);
571 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95 | GFC_STD_F77;
572 gfc_option.warn_std = GFC_STD_F95_OBS;
573 gfc_option.max_identifier_length = 31;
574 gfc_option.warn_ampersand = 1;
575 gfc_option.warn_tabs = 0;
579 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
580 | GFC_STD_F2003 | GFC_STD_F95;
581 gfc_option.warn_std = GFC_STD_F95_OBS;
582 gfc_option.max_continue_fixed = 255;
583 gfc_option.max_continue_free = 255;
584 gfc_option.max_identifier_length = 63;
585 gfc_option.warn_ampersand = 1;
589 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
590 | GFC_STD_F77 | GFC_STD_F95 | GFC_STD_F2003
591 | GFC_STD_GNU | GFC_STD_LEGACY;
592 gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
597 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
598 | GFC_STD_F77 | GFC_STD_F95 | GFC_STD_F2003
599 | GFC_STD_GNU | GFC_STD_LEGACY;
600 gfc_option.warn_std = 0;
603 case OPT_Wnonstd_intrinsics:
604 gfc_option.warn_nonstd_intrinsics = value;
607 case OPT_fshort_enums:
608 gfc_option.fshort_enums = 1;
611 case OPT_fconvert_little_endian:
612 gfc_option.convert = CONVERT_LITTLE;
615 case OPT_fconvert_big_endian:
616 gfc_option.convert = CONVERT_BIG;
619 case OPT_fconvert_native:
620 gfc_option.convert = CONVERT_NATIVE;
623 case OPT_fconvert_swap:
624 gfc_option.convert = CONVERT_SWAP;
627 case OPT_frecord_marker_4:
628 gfc_option.record_marker = 4;
631 case OPT_frecord_marker_8:
632 gfc_option.record_marker = 8;