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_allow_leading_underscore = 0;
98 gfc_option.flag_dump_core = 0;
99 gfc_option.flag_external_blas = 0;
100 gfc_option.blas_matmul_limit = 30;
101 gfc_option.flag_cray_pointer = 0;
102 gfc_option.flag_d_lines = -1;
103 gfc_option.flag_openmp = 0;
107 /* Argument pointers cannot point to anything but their argument. */
108 flag_argument_noalias = 3;
112 set_default_std_flags ();
114 gfc_option.warn_nonstd_intrinsics = 0;
116 /* -fshort-enums can be default on some targets. */
117 gfc_option.fshort_enums = targetm.default_short_enums ();
119 /* Increase MAX_ALIASED_VOPS to account for different characteristics
120 of Fortran regarding VOPs. */
121 MAX_ALIASED_VOPS = 50;
127 /* Determine the source form from the filename extension. We assume
128 case insensitivity. */
130 static gfc_source_form
131 form_from_filename (const char *filename)
135 const char *extension;
136 gfc_source_form form;
157 }; /* sentinel value */
159 gfc_source_form f_form;
163 /* Find end of file name. Note, filename is either a NULL pointer or
164 a NUL terminated string. */
166 while (filename[i] != '\0')
169 /* Find last period. */
170 while (i >= 0 && (filename[i] != '.'))
173 /* Did we see a file extension? */
175 return FORM_UNKNOWN; /* Nope */
177 /* Get file extension and compare it to others. */
178 fileext = &(filename[i]);
181 f_form = FORM_UNKNOWN;
185 if (strcasecmp (fileext, exttype[i].extension) == 0)
187 f_form = exttype[i].form;
191 while (exttype[i].form != FORM_UNKNOWN);
197 /* Finalize commandline options. */
200 gfc_post_options (const char **pfilename)
202 const char *filename = *pfilename, *canon_source_file = NULL;
206 /* Verify the input file name. */
207 if (!filename || strcmp (filename, "-") == 0)
212 if (gfc_option.flag_preprocessed)
214 /* For preprocessed files, if the first tokens are of the form # NUM.
215 handle the directives so we know the original file name. */
216 gfc_source_file = gfc_read_orig_filename (filename, &canon_source_file);
217 if (gfc_source_file == NULL)
218 gfc_source_file = filename;
220 *pfilename = gfc_source_file;
223 gfc_source_file = filename;
225 if (canon_source_file == NULL)
226 canon_source_file = gfc_source_file;
228 /* Adds the path where the source file is to the list of include files. */
230 i = strlen (canon_source_file);
231 while (i > 0 && !IS_DIR_SEPARATOR (canon_source_file[i]))
236 source_path = alloca (i + 1);
237 memcpy (source_path, canon_source_file, i);
239 gfc_add_include_path (source_path, true);
242 gfc_add_include_path (".", true);
244 if (canon_source_file != gfc_source_file)
245 gfc_free ((void *) canon_source_file);
247 /* Decide which form the file will be read in as. */
249 if (gfc_option.source_form != FORM_UNKNOWN)
250 gfc_current_form = gfc_option.source_form;
253 gfc_current_form = form_from_filename (filename);
255 if (gfc_current_form == FORM_UNKNOWN)
257 gfc_current_form = FORM_FREE;
258 gfc_warning_now ("Reading file '%s' as free form",
259 (filename[0] == '\0') ? "<stdin>" : filename);
263 /* If the user specified -fd-lines-as-{code|comments} verify that we're
265 if (gfc_current_form == FORM_FREE)
267 if (gfc_option.flag_d_lines == 0)
268 gfc_warning_now ("'-fd-lines-as-comments' has no effect "
270 else if (gfc_option.flag_d_lines == 1)
271 gfc_warning_now ("'-fd-lines-as-code' has no effect in free form");
274 flag_inline_trees = 1;
276 /* Use tree inlining. */
279 if (flag_inline_functions)
280 flag_inline_trees = 2;
282 /* If -pedantic, warn about the use of GNU extensions. */
283 if (pedantic && (gfc_option.allow_std & GFC_STD_GNU) != 0)
284 gfc_option.warn_std |= GFC_STD_GNU;
285 /* -std=legacy -pedantic is effectively -std=gnu. */
286 if (pedantic && (gfc_option.allow_std & GFC_STD_LEGACY) != 0)
287 gfc_option.warn_std |= GFC_STD_F95_OBS | GFC_STD_F95_DEL | GFC_STD_LEGACY;
289 /* If the user didn't explicitly specify -f(no)-second-underscore we
290 use it if we're trying to be compatible with f2c, and not
292 if (gfc_option.flag_second_underscore == -1)
293 gfc_option.flag_second_underscore = gfc_option.flag_f2c;
295 /* Implement -fno-automatic as -fmax-stack-var-size=0. */
296 if (!gfc_option.flag_automatic)
297 gfc_option.flag_max_stack_var_size = 0;
301 gfc_option.warn_ampersand = 1;
302 gfc_option.warn_tabs = 0;
305 if (gfc_option.flag_all_intrinsics)
306 gfc_option.warn_nonstd_intrinsics = 0;
312 /* Set the options for -Wall. */
315 set_Wall (int setting)
317 gfc_option.warn_aliasing = setting;
318 gfc_option.warn_ampersand = setting;
319 gfc_option.warn_line_truncation = setting;
320 gfc_option.warn_nonstd_intrinsics = setting;
321 gfc_option.warn_surprising = setting;
322 gfc_option.warn_tabs = !setting;
323 gfc_option.warn_underflow = setting;
324 gfc_option.warn_character_truncation = setting;
326 set_Wunused (setting);
327 warn_return_type = setting;
328 warn_switch = setting;
330 /* We save the value of warn_uninitialized, since if they put
331 -Wuninitialized on the command line, we need to generate a
332 warning about not using it without also specifying -O. */
334 warn_uninitialized = 0;
335 else if (warn_uninitialized != 1)
336 warn_uninitialized = 2;
341 gfc_handle_module_path_options (const char *arg)
344 if (gfc_option.module_dir != NULL)
346 gfc_status ("gfortran: Only one -M option allowed\n");
352 gfc_status ("gfortran: Directory required after -M\n");
356 gfc_option.module_dir = (char *) gfc_getmem (strlen (arg) + 2);
357 strcpy (gfc_option.module_dir, arg);
358 strcat (gfc_option.module_dir, "/");
360 gfc_add_include_path (gfc_option.module_dir, true);
365 gfc_handle_fpe_trap_option (const char *arg)
367 int result, pos = 0, n;
368 static const char * const exception[] = { "invalid", "denormal", "zero",
369 "overflow", "underflow",
371 static const int opt_exception[] = { GFC_FPE_INVALID, GFC_FPE_DENORMAL,
372 GFC_FPE_ZERO, GFC_FPE_OVERFLOW,
373 GFC_FPE_UNDERFLOW, GFC_FPE_PRECISION,
381 while (arg[pos] && arg[pos] != ',')
385 for (n = 0; exception[n] != NULL; n++)
387 if (exception[n] && strncmp (exception[n], arg, pos) == 0)
389 gfc_option.fpe |= opt_exception[n];
397 gfc_fatal_error ("Argument to -ffpe-trap is not valid: %s", arg);
402 /* Handle command-line options. Returns 0 if unrecognized, 1 if
403 recognized and handled. */
406 gfc_handle_option (size_t scode, const char *arg, int value)
409 enum opt_code code = (enum opt_code) scode;
411 /* Ignore file names. */
426 gfc_option.warn_aliasing = value;
430 gfc_option.warn_ampersand = value;
433 case OPT_Wcharacter_truncation:
434 gfc_option.warn_character_truncation = value;
437 case OPT_Wconversion:
438 gfc_option.warn_conversion = value;
441 case OPT_Wimplicit_interface:
442 gfc_option.warn_implicit_interface = value;
445 case OPT_Wline_truncation:
446 gfc_option.warn_line_truncation = value;
449 case OPT_Wsurprising:
450 gfc_option.warn_surprising = value;
454 gfc_option.warn_tabs = value;
458 gfc_option.warn_underflow = value;
461 case OPT_fall_intrinsics:
462 gfc_option.flag_all_intrinsics = 1;
466 gfc_option.flag_automatic = value;
469 case OPT_fallow_leading_underscore:
470 gfc_option.flag_allow_leading_underscore = value;
474 gfc_option.flag_backslash = value;
478 gfc_option.flag_dump_core = value;
481 case OPT_fcray_pointer:
482 gfc_option.flag_cray_pointer = value;
486 gfc_option.flag_f2c = value;
490 gfc_option.flag_dollar_ok = value;
493 case OPT_fexternal_blas:
494 gfc_option.flag_external_blas = value;
497 case OPT_fblas_matmul_limit_:
498 gfc_option.blas_matmul_limit = value;
501 case OPT_fd_lines_as_code:
502 gfc_option.flag_d_lines = 1;
505 case OPT_fd_lines_as_comments:
506 gfc_option.flag_d_lines = 0;
509 case OPT_fdump_parse_tree:
510 gfc_option.verbose = value;
513 case OPT_ffixed_form:
514 gfc_option.source_form = FORM_FIXED;
517 case OPT_ffixed_line_length_none:
518 gfc_option.fixed_line_length = 0;
521 case OPT_ffixed_line_length_:
522 if (value != 0 && value < 7)
523 gfc_fatal_error ("Fixed line length must be at least seven.");
524 gfc_option.fixed_line_length = value;
528 gfc_option.source_form = FORM_FREE;
532 gfc_option.flag_openmp = value;
535 case OPT_ffree_line_length_none:
536 gfc_option.free_line_length = 0;
539 case OPT_ffree_line_length_:
540 gfc_option.free_line_length = value;
543 case OPT_funderscoring:
544 gfc_option.flag_underscoring = value;
547 case OPT_fsecond_underscore:
548 gfc_option.flag_second_underscore = value;
551 case OPT_fimplicit_none:
552 gfc_option.flag_implicit_none = value;
555 case OPT_fintrinsic_modules_path:
556 gfc_add_include_path (arg, false);
557 gfc_add_intrinsic_modules_path (arg);
560 case OPT_fmax_errors_:
561 gfc_option.max_errors = value;
564 case OPT_fmax_stack_var_size_:
565 gfc_option.flag_max_stack_var_size = value;
568 case OPT_frange_check:
569 gfc_option.flag_range_check = value;
572 case OPT_fpack_derived:
573 gfc_option.flag_pack_derived = value;
576 case OPT_frepack_arrays:
577 gfc_option.flag_repack_arrays = value;
580 case OPT_fpreprocessed:
581 gfc_option.flag_preprocessed = value;
584 case OPT_fmax_identifier_length_:
585 if (value > GFC_MAX_SYMBOL_LEN)
586 gfc_fatal_error ("Maximum supported identifier length is %d",
588 gfc_option.max_identifier_length = value;
591 case OPT_fdefault_integer_8:
592 gfc_option.flag_default_integer = value;
595 case OPT_fdefault_real_8:
596 gfc_option.flag_default_real = value;
599 case OPT_fdefault_double_8:
600 gfc_option.flag_default_double = value;
604 gfc_add_include_path (arg, true);
609 gfc_handle_module_path_options (arg);
613 gfc_handle_fpe_trap_option (arg);
617 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95 | GFC_STD_F77;
618 gfc_option.warn_std = GFC_STD_F95_OBS;
619 gfc_option.max_identifier_length = 31;
620 gfc_option.warn_ampersand = 1;
621 gfc_option.warn_tabs = 0;
625 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
626 | GFC_STD_F2003 | GFC_STD_F95;
627 gfc_option.warn_std = GFC_STD_F95_OBS;
628 gfc_option.max_continue_fixed = 255;
629 gfc_option.max_continue_free = 255;
630 gfc_option.max_identifier_length = 63;
631 gfc_option.warn_ampersand = 1;
632 gfc_option.warn_tabs = 0;
636 set_default_std_flags ();
640 set_default_std_flags ();
641 gfc_option.warn_std = 0;
644 case OPT_Wnonstd_intrinsics:
645 gfc_option.warn_nonstd_intrinsics = value;
648 case OPT_fshort_enums:
649 gfc_option.fshort_enums = 1;
652 case OPT_fconvert_little_endian:
653 gfc_option.convert = CONVERT_LITTLE;
656 case OPT_fconvert_big_endian:
657 gfc_option.convert = CONVERT_BIG;
660 case OPT_fconvert_native:
661 gfc_option.convert = CONVERT_NATIVE;
664 case OPT_fconvert_swap:
665 gfc_option.convert = CONVERT_SWAP;
668 case OPT_frecord_marker_4:
669 gfc_option.record_marker = 4;
672 case OPT_frecord_marker_8:
673 gfc_option.record_marker = 8;
676 case OPT_fmax_subrecord_length_:
677 if (value > MAX_SUBRECORD_LENGTH)
678 gfc_fatal_error ("Maximum subrecord length cannot exceed %d",
679 MAX_SUBRECORD_LENGTH);
681 gfc_option.max_subrecord_length = value;