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_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;
65 gfc_option.flag_all_intrinsics = 0;
66 gfc_option.flag_default_double = 0;
67 gfc_option.flag_default_integer = 0;
68 gfc_option.flag_default_real = 0;
69 gfc_option.flag_dollar_ok = 0;
70 gfc_option.flag_underscoring = 1;
71 gfc_option.flag_f2c = 0;
72 gfc_option.flag_second_underscore = -1;
73 gfc_option.flag_implicit_none = 0;
74 gfc_option.flag_max_stack_var_size = 32768;
75 gfc_option.flag_module_access_private = 0;
76 gfc_option.flag_no_backend = 0;
77 gfc_option.flag_range_check = 1;
78 gfc_option.flag_pack_derived = 0;
79 gfc_option.flag_repack_arrays = 0;
80 gfc_option.flag_preprocessed = 0;
81 gfc_option.flag_automatic = 1;
82 gfc_option.flag_backslash = 1;
83 gfc_option.flag_cray_pointer = 0;
84 gfc_option.flag_d_lines = -1;
85 gfc_option.flag_openmp = 0;
87 gfc_option.q_kind = gfc_default_double_kind;
91 /* Argument pointers cannot point to anything
92 but their argument. */
93 flag_argument_noalias = 3;
97 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
98 | GFC_STD_F2003 | GFC_STD_F95 | GFC_STD_F77 | GFC_STD_GNU
100 gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
103 gfc_option.warn_nonstd_intrinsics = 0;
105 /* -fshort-enums can be default on some targets. */
106 gfc_option.fshort_enums = targetm.default_short_enums ();
112 /* Determine the source form from the filename extension. We assume
113 case insensitivity. */
115 static gfc_source_form
116 form_from_filename (const char *filename)
121 const char *extension;
122 gfc_source_form form;
140 }; /* sentinel value */
142 gfc_source_form f_form;
146 /* Find end of file name. Note, filename is either a NULL pointer or
147 a NUL terminated string. */
149 while (filename[i] != '\0')
152 /* Find last period. */
153 while (i >= 0 && (filename[i] != '.'))
156 /* Did we see a file extension? */
158 return FORM_UNKNOWN; /* Nope */
160 /* Get file extension and compare it to others. */
161 fileext = &(filename[i]);
164 f_form = FORM_UNKNOWN;
168 if (strcasecmp (fileext, exttype[i].extension) == 0)
170 f_form = exttype[i].form;
174 while (exttype[i].form != FORM_UNKNOWN);
180 /* Finalize commandline options. */
183 gfc_post_options (const char **pfilename)
185 const char *filename = *pfilename, *canon_source_file = NULL;
189 /* Verify the input file name. */
190 if (!filename || strcmp (filename, "-") == 0)
195 if (gfc_option.flag_preprocessed)
197 /* For preprocessed files, if the first tokens are of the form # NUM.
198 handle the directives so we know the original file name. */
199 gfc_source_file = gfc_read_orig_filename (filename, &canon_source_file);
200 if (gfc_source_file == NULL)
201 gfc_source_file = filename;
203 *pfilename = gfc_source_file;
206 gfc_source_file = filename;
208 if (canon_source_file == NULL)
209 canon_source_file = gfc_source_file;
211 /* Adds the path where the source file is to the list of include files. */
213 i = strlen (canon_source_file);
214 while (i > 0 && !IS_DIR_SEPARATOR (canon_source_file[i]))
218 source_path = alloca (i + 1);
219 memcpy (source_path, canon_source_file, i);
221 gfc_add_include_path (source_path);
224 gfc_add_include_path (".");
226 if (canon_source_file != gfc_source_file)
227 gfc_free ((void *) canon_source_file);
229 /* Decide which form the file will be read in as. */
231 if (gfc_option.source_form != FORM_UNKNOWN)
232 gfc_current_form = gfc_option.source_form;
235 gfc_current_form = form_from_filename (filename);
237 if (gfc_current_form == FORM_UNKNOWN)
239 gfc_current_form = FORM_FREE;
240 gfc_warning_now ("Reading file '%s' as free form.",
241 (filename[0] == '\0') ? "<stdin>" : filename);
245 /* If the user specified -fd-lines-as-{code|comments} verify that we're
247 if (gfc_current_form == FORM_FREE)
249 if (gfc_option.flag_d_lines == 0)
250 gfc_warning_now ("'-fd-lines-as-comments' has no effect "
252 else if (gfc_option.flag_d_lines == 1)
253 gfc_warning_now ("'-fd-lines-as-code' has no effect "
257 flag_inline_trees = 1;
259 /* Use tree inlining. */
262 if (flag_inline_functions)
263 flag_inline_trees = 2;
265 /* If -pedantic, warn about the use of GNU extensions. */
266 if (pedantic && (gfc_option.allow_std & GFC_STD_GNU) != 0)
267 gfc_option.warn_std |= GFC_STD_GNU;
268 /* -std=legacy -pedantic is effectively -std=gnu. */
269 if (pedantic && (gfc_option.allow_std & GFC_STD_LEGACY) != 0)
270 gfc_option.warn_std |= GFC_STD_F95_OBS | GFC_STD_F95_DEL | GFC_STD_LEGACY;
272 /* If the user didn't explicitly specify -f(no)-second-underscore we
273 use it if we're trying to be compatible with f2c, and not
275 if (gfc_option.flag_second_underscore == -1)
276 gfc_option.flag_second_underscore = gfc_option.flag_f2c;
278 /* Implement -fno-automatic as -fmax-stack-var-size=0. */
279 if (!gfc_option.flag_automatic)
280 gfc_option.flag_max_stack_var_size = 0;
283 gfc_option.warn_ampersand = 1;
285 if (gfc_option.flag_all_intrinsics)
286 gfc_option.warn_nonstd_intrinsics = 0;
292 /* Set the options for -Wall. */
298 gfc_option.warn_aliasing = 1;
299 gfc_option.warn_ampersand = 1;
300 gfc_option.warn_line_truncation = 1;
301 gfc_option.warn_nonstd_intrinsics = 1;
302 gfc_option.warn_surprising = 1;
303 gfc_option.warn_tabs = 0;
304 gfc_option.warn_underflow = 1;
307 warn_return_type = 1;
310 /* We save the value of warn_uninitialized, since if they put
311 -Wuninitialized on the command line, we need to generate a
312 warning about not using it without also specifying -O. */
314 if (warn_uninitialized != 1)
315 warn_uninitialized = 2;
320 gfc_handle_module_path_options (const char *arg)
323 if (gfc_option.module_dir != NULL)
325 gfc_status ("gfortran: Only one -M option allowed\n");
331 gfc_status ("gfortran: Directory required after -M\n");
335 gfc_option.module_dir = (char *) gfc_getmem (strlen (arg) + 2);
336 strcpy (gfc_option.module_dir, arg);
337 strcat (gfc_option.module_dir, "/");
341 gfc_handle_fpe_trap_option (const char *arg)
343 int result, pos = 0, n;
344 static const char * const exception[] = { "invalid", "denormal", "zero",
345 "overflow", "underflow",
347 static const int opt_exception[] = { GFC_FPE_INVALID, GFC_FPE_DENORMAL,
348 GFC_FPE_ZERO, GFC_FPE_OVERFLOW,
349 GFC_FPE_UNDERFLOW, GFC_FPE_PRECISION,
356 while (arg[pos] && arg[pos] != ',')
359 for (n = 0; exception[n] != NULL; n++)
361 if (exception[n] && strncmp (exception[n], arg, pos) == 0)
363 gfc_option.fpe |= opt_exception[n];
371 gfc_fatal_error ("Argument to -ffpe-trap is not valid: %s", arg);
375 /* Handle command-line options. Returns 0 if unrecognized, 1 if
376 recognized and handled. */
378 gfc_handle_option (size_t scode, const char *arg, int value)
381 enum opt_code code = (enum opt_code) scode;
383 /* Ignore file names. */
398 gfc_option.warn_aliasing = value;
402 gfc_option.warn_ampersand = value;
405 case OPT_Wconversion:
406 gfc_option.warn_conversion = value;
409 case OPT_Wimplicit_interface:
410 gfc_option.warn_implicit_interface = value;
413 case OPT_Wline_truncation:
414 gfc_option.warn_line_truncation = value;
417 case OPT_Wsurprising:
418 gfc_option.warn_surprising = value;
422 gfc_option.warn_tabs = value;
426 gfc_option.warn_underflow = value;
429 case OPT_fall_intrinsics:
430 gfc_option.flag_all_intrinsics = 1;
434 gfc_option.flag_automatic = value;
438 gfc_option.flag_backslash = value;
441 case OPT_fcray_pointer:
442 gfc_option.flag_cray_pointer = value;
446 gfc_option.flag_f2c = value;
450 gfc_option.flag_dollar_ok = value;
453 case OPT_fd_lines_as_code:
454 gfc_option.flag_d_lines = 1;
457 case OPT_fd_lines_as_comments:
458 gfc_option.flag_d_lines = 0;
461 case OPT_fdump_parse_tree:
462 gfc_option.verbose = value;
465 case OPT_ffixed_form:
466 gfc_option.source_form = FORM_FIXED;
469 case OPT_ffixed_line_length_none:
470 gfc_option.fixed_line_length = 0;
473 case OPT_ffixed_line_length_:
474 if (value != 0 && value < 7)
475 gfc_fatal_error ("Fixed line length must be at least seven.");
476 gfc_option.fixed_line_length = value;
480 gfc_option.source_form = FORM_FREE;
484 gfc_option.flag_openmp = value;
487 case OPT_ffree_line_length_none:
488 gfc_option.free_line_length = 0;
491 case OPT_ffree_line_length_:
492 gfc_option.free_line_length = value;
495 case OPT_funderscoring:
496 gfc_option.flag_underscoring = value;
499 case OPT_fsecond_underscore:
500 gfc_option.flag_second_underscore = value;
503 case OPT_fimplicit_none:
504 gfc_option.flag_implicit_none = value;
507 case OPT_fmax_stack_var_size_:
508 gfc_option.flag_max_stack_var_size = value;
511 case OPT_fmodule_private:
512 gfc_option.flag_module_access_private = value;
515 case OPT_fno_backend:
516 gfc_option.flag_no_backend = value;
519 case OPT_frange_check:
520 gfc_option.flag_range_check = value;
523 case OPT_fpack_derived:
524 gfc_option.flag_pack_derived = value;
527 case OPT_frepack_arrays:
528 gfc_option.flag_repack_arrays = value;
531 case OPT_fpreprocessed:
532 gfc_option.flag_preprocessed = value;
535 case OPT_fmax_identifier_length_:
536 if (value > GFC_MAX_SYMBOL_LEN)
537 gfc_fatal_error ("Maximum supported identifier length is %d",
539 gfc_option.max_identifier_length = value;
543 if (gfc_validate_kind (BT_REAL, value, true) < 0)
544 gfc_fatal_error ("Argument to -fqkind isn't a valid real kind");
545 gfc_option.q_kind = value;
548 case OPT_fdefault_integer_8:
549 gfc_option.flag_default_integer = value;
552 case OPT_fdefault_real_8:
553 gfc_option.flag_default_real = value;
556 case OPT_fdefault_double_8:
557 gfc_option.flag_default_double = value;
561 gfc_add_include_path (arg);
566 gfc_handle_module_path_options (arg);
570 gfc_handle_fpe_trap_option (arg);
574 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95 | GFC_STD_F77;
575 gfc_option.warn_std = GFC_STD_F95_OBS;
576 gfc_option.max_identifier_length = 31;
577 gfc_option.warn_ampersand = 1;
578 gfc_option.warn_tabs = 0;
582 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
583 | GFC_STD_F2003 | GFC_STD_F95;
584 gfc_option.warn_std = GFC_STD_F95_OBS;
585 gfc_option.max_continue_fixed = 255;
586 gfc_option.max_continue_free = 255;
587 gfc_option.max_identifier_length = 63;
588 gfc_option.warn_ampersand = 1;
592 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
593 | GFC_STD_F77 | GFC_STD_F95 | GFC_STD_F2003
594 | GFC_STD_GNU | GFC_STD_LEGACY;
595 gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
600 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
601 | GFC_STD_F77 | GFC_STD_F95 | GFC_STD_F2003
602 | GFC_STD_GNU | GFC_STD_LEGACY;
603 gfc_option.warn_std = 0;
606 case OPT_Wnonstd_intrinsics:
607 gfc_option.warn_nonstd_intrinsics = value;
610 case OPT_fshort_enums:
611 gfc_option.fshort_enums = 1;
614 case OPT_fconvert_little_endian:
615 gfc_option.convert = CONVERT_LITTLE;
618 case OPT_fconvert_big_endian:
619 gfc_option.convert = CONVERT_BIG;
622 case OPT_fconvert_native:
623 gfc_option.convert = CONVERT_NATIVE;
626 case OPT_fconvert_swap:
627 gfc_option.convert = CONVERT_SWAP;
630 case OPT_frecord_marker_4:
631 gfc_option.record_marker = 4;
634 case OPT_frecord_marker_8:
635 gfc_option.record_marker = 8;