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;
64 gfc_option.warn_unused_labels = 0;
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_module_access_private = 0;
77 gfc_option.flag_no_backend = 0;
78 gfc_option.flag_range_check = 1;
79 gfc_option.flag_pack_derived = 0;
80 gfc_option.flag_repack_arrays = 0;
81 gfc_option.flag_preprocessed = 0;
82 gfc_option.flag_automatic = 1;
83 gfc_option.flag_backslash = 1;
84 gfc_option.flag_cray_pointer = 0;
85 gfc_option.flag_d_lines = -1;
86 gfc_option.flag_openmp = 0;
88 gfc_option.q_kind = gfc_default_double_kind;
92 /* Argument pointers cannot point to anything
93 but their argument. */
94 flag_argument_noalias = 3;
98 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
99 | GFC_STD_F2003 | GFC_STD_F95 | GFC_STD_F77 | GFC_STD_GNU
101 gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
104 gfc_option.warn_nonstd_intrinsics = 0;
106 /* -fshort-enums can be default on some targets. */
107 gfc_option.fshort_enums = targetm.default_short_enums ();
113 /* Determine the source form from the filename extension. We assume
114 case insensitivity. */
116 static gfc_source_form
117 form_from_filename (const char *filename)
122 const char *extension;
123 gfc_source_form form;
141 }; /* sentinel value */
143 gfc_source_form f_form;
147 /* Find end of file name. Note, filename is either a NULL pointer or
148 a NUL terminated string. */
150 while (filename[i] != '\0')
153 /* Find last period. */
154 while (i >= 0 && (filename[i] != '.'))
157 /* Did we see a file extension? */
159 return FORM_UNKNOWN; /* Nope */
161 /* Get file extension and compare it to others. */
162 fileext = &(filename[i]);
165 f_form = FORM_UNKNOWN;
169 if (strcasecmp (fileext, exttype[i].extension) == 0)
171 f_form = exttype[i].form;
175 while (exttype[i].form != FORM_UNKNOWN);
181 /* Finalize commandline options. */
184 gfc_post_options (const char **pfilename)
186 const char *filename = *pfilename, *canon_source_file = NULL;
190 /* Verify the input file name. */
191 if (!filename || strcmp (filename, "-") == 0)
196 if (gfc_option.flag_preprocessed)
198 /* For preprocessed files, if the first tokens are of the form # NUM.
199 handle the directives so we know the original file name. */
200 gfc_source_file = gfc_read_orig_filename (filename, &canon_source_file);
201 if (gfc_source_file == NULL)
202 gfc_source_file = filename;
204 *pfilename = gfc_source_file;
207 gfc_source_file = filename;
209 if (canon_source_file == NULL)
210 canon_source_file = gfc_source_file;
212 /* Adds the path where the source file is to the list of include files. */
214 i = strlen (canon_source_file);
215 while (i > 0 && !IS_DIR_SEPARATOR (canon_source_file[i]))
219 source_path = alloca (i + 1);
220 memcpy (source_path, canon_source_file, i);
222 gfc_add_include_path (source_path);
225 gfc_add_include_path (".");
227 if (canon_source_file != gfc_source_file)
228 gfc_free ((void *) canon_source_file);
230 /* Decide which form the file will be read in as. */
232 if (gfc_option.source_form != FORM_UNKNOWN)
233 gfc_current_form = gfc_option.source_form;
236 gfc_current_form = form_from_filename (filename);
238 if (gfc_current_form == FORM_UNKNOWN)
240 gfc_current_form = FORM_FREE;
241 gfc_warning_now ("Reading file '%s' as free form.",
242 (filename[0] == '\0') ? "<stdin>" : filename);
246 /* If the user specified -fd-lines-as-{code|comments} verify that we're
248 if (gfc_current_form == FORM_FREE)
250 if (gfc_option.flag_d_lines == 0)
251 gfc_warning_now ("'-fd-lines-as-comments' has no effect "
253 else if (gfc_option.flag_d_lines == 1)
254 gfc_warning_now ("'-fd-lines-as-code' has no effect "
258 flag_inline_trees = 1;
260 /* Use tree inlining. */
263 if (flag_inline_functions)
264 flag_inline_trees = 2;
266 /* If -pedantic, warn about the use of GNU extensions. */
267 if (pedantic && (gfc_option.allow_std & GFC_STD_GNU) != 0)
268 gfc_option.warn_std |= GFC_STD_GNU;
269 /* -std=legacy -pedantic is effectively -std=gnu. */
270 if (pedantic && (gfc_option.allow_std & GFC_STD_LEGACY) != 0)
271 gfc_option.warn_std |= GFC_STD_F95_OBS | GFC_STD_F95_DEL | GFC_STD_LEGACY;
273 /* If the user didn't explicitly specify -f(no)-second-underscore we
274 use it if we're trying to be compatible with f2c, and not
276 if (gfc_option.flag_second_underscore == -1)
277 gfc_option.flag_second_underscore = gfc_option.flag_f2c;
279 /* Implement -fno-automatic as -fmax-stack-var-size=0. */
280 if (!gfc_option.flag_automatic)
281 gfc_option.flag_max_stack_var_size = 0;
284 gfc_option.warn_ampersand = 1;
286 if (gfc_option.flag_all_intrinsics)
287 gfc_option.warn_nonstd_intrinsics = 0;
293 /* Set the options for -Wall. */
299 gfc_option.warn_aliasing = 1;
300 gfc_option.warn_ampersand = 1;
301 gfc_option.warn_line_truncation = 1;
302 gfc_option.warn_nonstd_intrinsics = 1;
303 gfc_option.warn_surprising = 1;
304 gfc_option.warn_tabs = 0;
305 gfc_option.warn_underflow = 1;
306 gfc_option.warn_unused_labels = 1;
309 warn_return_type = 1;
312 /* We save the value of warn_uninitialized, since if they put
313 -Wuninitialized on the command line, we need to generate a
314 warning about not using it without also specifying -O. */
316 if (warn_uninitialized != 1)
317 warn_uninitialized = 2;
322 gfc_handle_module_path_options (const char *arg)
325 if (gfc_option.module_dir != NULL)
327 gfc_status ("gfortran: Only one -M option allowed\n");
333 gfc_status ("gfortran: Directory required after -M\n");
337 gfc_option.module_dir = (char *) gfc_getmem (strlen (arg) + 2);
338 strcpy (gfc_option.module_dir, arg);
339 strcat (gfc_option.module_dir, "/");
343 gfc_handle_fpe_trap_option (const char *arg)
345 int result, pos = 0, n;
346 static const char * const exception[] = { "invalid", "denormal", "zero",
347 "overflow", "underflow",
349 static const int opt_exception[] = { GFC_FPE_INVALID, GFC_FPE_DENORMAL,
350 GFC_FPE_ZERO, GFC_FPE_OVERFLOW,
351 GFC_FPE_UNDERFLOW, GFC_FPE_PRECISION,
358 while (arg[pos] && arg[pos] != ',')
361 for (n = 0; exception[n] != NULL; n++)
363 if (exception[n] && strncmp (exception[n], arg, pos) == 0)
365 gfc_option.fpe |= opt_exception[n];
373 gfc_fatal_error ("Argument to -ffpe-trap is not valid: %s", arg);
377 /* Handle command-line options. Returns 0 if unrecognized, 1 if
378 recognized and handled. */
380 gfc_handle_option (size_t scode, const char *arg, int value)
383 enum opt_code code = (enum opt_code) scode;
385 /* Ignore file names. */
400 gfc_option.warn_aliasing = value;
404 gfc_option.warn_ampersand = value;
407 case OPT_Wconversion:
408 gfc_option.warn_conversion = value;
411 case OPT_Wimplicit_interface:
412 gfc_option.warn_implicit_interface = value;
415 case OPT_Wline_truncation:
416 gfc_option.warn_line_truncation = value;
419 case OPT_Wsurprising:
420 gfc_option.warn_surprising = value;
424 gfc_option.warn_tabs = value;
428 gfc_option.warn_underflow = value;
431 case OPT_Wunused_labels:
432 gfc_option.warn_unused_labels = value;
435 case OPT_fall_intrinsics:
436 gfc_option.flag_all_intrinsics = 1;
440 gfc_option.flag_automatic = value;
444 gfc_option.flag_backslash = value;
447 case OPT_fcray_pointer:
448 gfc_option.flag_cray_pointer = value;
452 gfc_option.flag_f2c = value;
456 gfc_option.flag_dollar_ok = value;
459 case OPT_fd_lines_as_code:
460 gfc_option.flag_d_lines = 1;
463 case OPT_fd_lines_as_comments:
464 gfc_option.flag_d_lines = 0;
467 case OPT_fdump_parse_tree:
468 gfc_option.verbose = value;
471 case OPT_ffixed_form:
472 gfc_option.source_form = FORM_FIXED;
475 case OPT_ffixed_line_length_none:
476 gfc_option.fixed_line_length = 0;
479 case OPT_ffixed_line_length_:
480 if (value != 0 && value < 7)
481 gfc_fatal_error ("Fixed line length must be at least seven.");
482 gfc_option.fixed_line_length = value;
486 gfc_option.source_form = FORM_FREE;
490 gfc_option.flag_openmp = value;
493 case OPT_ffree_line_length_none:
494 gfc_option.free_line_length = 0;
497 case OPT_ffree_line_length_:
498 gfc_option.free_line_length = value;
501 case OPT_funderscoring:
502 gfc_option.flag_underscoring = value;
505 case OPT_fsecond_underscore:
506 gfc_option.flag_second_underscore = value;
509 case OPT_fimplicit_none:
510 gfc_option.flag_implicit_none = value;
513 case OPT_fmax_stack_var_size_:
514 gfc_option.flag_max_stack_var_size = value;
517 case OPT_fmodule_private:
518 gfc_option.flag_module_access_private = value;
521 case OPT_fno_backend:
522 gfc_option.flag_no_backend = value;
525 case OPT_frange_check:
526 gfc_option.flag_range_check = value;
529 case OPT_fpack_derived:
530 gfc_option.flag_pack_derived = value;
533 case OPT_frepack_arrays:
534 gfc_option.flag_repack_arrays = value;
537 case OPT_fpreprocessed:
538 gfc_option.flag_preprocessed = value;
541 case OPT_fmax_identifier_length_:
542 if (value > GFC_MAX_SYMBOL_LEN)
543 gfc_fatal_error ("Maximum supported identifier length is %d",
545 gfc_option.max_identifier_length = value;
549 if (gfc_validate_kind (BT_REAL, value, true) < 0)
550 gfc_fatal_error ("Argument to -fqkind isn't a valid real kind");
551 gfc_option.q_kind = value;
554 case OPT_fdefault_integer_8:
555 gfc_option.flag_default_integer = value;
558 case OPT_fdefault_real_8:
559 gfc_option.flag_default_real = value;
562 case OPT_fdefault_double_8:
563 gfc_option.flag_default_double = value;
567 gfc_add_include_path (arg);
572 gfc_handle_module_path_options (arg);
576 gfc_handle_fpe_trap_option (arg);
580 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95 | GFC_STD_F77;
581 gfc_option.warn_std = GFC_STD_F95_OBS;
582 gfc_option.max_identifier_length = 31;
583 gfc_option.warn_ampersand = 1;
584 gfc_option.warn_tabs = 0;
588 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
589 | GFC_STD_F2003 | GFC_STD_F95;
590 gfc_option.warn_std = GFC_STD_F95_OBS;
591 gfc_option.max_continue_fixed = 255;
592 gfc_option.max_continue_free = 255;
593 gfc_option.max_identifier_length = 63;
594 gfc_option.warn_ampersand = 1;
598 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
599 | GFC_STD_F77 | GFC_STD_F95 | GFC_STD_F2003
600 | GFC_STD_GNU | GFC_STD_LEGACY;
601 gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
606 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
607 | GFC_STD_F77 | GFC_STD_F95 | GFC_STD_F2003
608 | GFC_STD_GNU | GFC_STD_LEGACY;
609 gfc_option.warn_std = 0;
612 case OPT_Wnonstd_intrinsics:
613 gfc_option.warn_nonstd_intrinsics = value;
616 case OPT_fshort_enums:
617 gfc_option.fshort_enums = 1;
620 case OPT_fconvert_little_endian:
621 gfc_option.convert = CONVERT_LITTLE;
624 case OPT_fconvert_big_endian:
625 gfc_option.convert = CONVERT_BIG;
628 case OPT_fconvert_native:
629 gfc_option.convert = CONVERT_NATIVE;
632 case OPT_fconvert_swap:
633 gfc_option.convert = CONVERT_SWAP;
636 case OPT_frecord_marker_4:
637 gfc_option.record_marker = 4;
640 case OPT_frecord_marker_8:
641 gfc_option.record_marker = 8;