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"
33 #include "tree-inline.h"
38 gfc_option_t gfc_option;
41 /* Get ready for options handling. */
44 gfc_init_options (unsigned int argc ATTRIBUTE_UNUSED,
45 const char **argv ATTRIBUTE_UNUSED)
47 gfc_source_file = NULL;
48 gfc_option.module_dir = NULL;
49 gfc_option.source_form = FORM_UNKNOWN;
50 gfc_option.fixed_line_length = 72;
51 gfc_option.free_line_length = 132;
52 gfc_option.max_continue_fixed = 19;
53 gfc_option.max_continue_free = 39;
54 gfc_option.max_identifier_length = GFC_MAX_SYMBOL_LEN;
55 gfc_option.max_subrecord_length = 0;
56 gfc_option.convert = CONVERT_NATIVE;
57 gfc_option.record_marker = 0;
58 gfc_option.verbose = 0;
60 gfc_option.warn_aliasing = 0;
61 gfc_option.warn_ampersand = 0;
62 gfc_option.warn_conversion = 0;
63 gfc_option.warn_implicit_interface = 0;
64 gfc_option.warn_line_truncation = 0;
65 gfc_option.warn_surprising = 0;
66 gfc_option.warn_tabs = 1;
67 gfc_option.warn_underflow = 1;
68 gfc_option.max_errors = 25;
70 gfc_option.flag_all_intrinsics = 0;
71 gfc_option.flag_default_double = 0;
72 gfc_option.flag_default_integer = 0;
73 gfc_option.flag_default_real = 0;
74 gfc_option.flag_dollar_ok = 0;
75 gfc_option.flag_underscoring = 1;
76 gfc_option.flag_f2c = 0;
77 gfc_option.flag_second_underscore = -1;
78 gfc_option.flag_implicit_none = 0;
79 gfc_option.flag_max_stack_var_size = 32768;
80 gfc_option.flag_range_check = 1;
81 gfc_option.flag_pack_derived = 0;
82 gfc_option.flag_repack_arrays = 0;
83 gfc_option.flag_preprocessed = 0;
84 gfc_option.flag_automatic = 1;
85 gfc_option.flag_backslash = 1;
86 gfc_option.flag_external_blas = 0;
87 gfc_option.blas_matmul_limit = 30;
88 gfc_option.flag_cray_pointer = 0;
89 gfc_option.flag_d_lines = -1;
90 gfc_option.flag_openmp = 0;
94 /* Argument pointers cannot point to anything
95 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)
128 const char *extension;
129 gfc_source_form form;
147 }; /* sentinel value */
149 gfc_source_form f_form;
153 /* Find end of file name. Note, filename is either a NULL pointer or
154 a NUL terminated string. */
156 while (filename[i] != '\0')
159 /* Find last period. */
160 while (i >= 0 && (filename[i] != '.'))
163 /* Did we see a file extension? */
165 return FORM_UNKNOWN; /* Nope */
167 /* Get file extension and compare it to others. */
168 fileext = &(filename[i]);
171 f_form = FORM_UNKNOWN;
175 if (strcasecmp (fileext, exttype[i].extension) == 0)
177 f_form = exttype[i].form;
181 while (exttype[i].form != FORM_UNKNOWN);
187 /* Finalize commandline options. */
190 gfc_post_options (const char **pfilename)
192 const char *filename = *pfilename, *canon_source_file = NULL;
196 /* Verify the input file name. */
197 if (!filename || strcmp (filename, "-") == 0)
202 if (gfc_option.flag_preprocessed)
204 /* For preprocessed files, if the first tokens are of the form # NUM.
205 handle the directives so we know the original file name. */
206 gfc_source_file = gfc_read_orig_filename (filename, &canon_source_file);
207 if (gfc_source_file == NULL)
208 gfc_source_file = filename;
210 *pfilename = gfc_source_file;
213 gfc_source_file = filename;
215 if (canon_source_file == NULL)
216 canon_source_file = gfc_source_file;
218 /* Adds the path where the source file is to the list of include files. */
220 i = strlen (canon_source_file);
221 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 "
264 flag_inline_trees = 1;
266 /* Use tree inlining. */
269 if (flag_inline_functions)
270 flag_inline_trees = 2;
272 /* If -pedantic, warn about the use of GNU extensions. */
273 if (pedantic && (gfc_option.allow_std & GFC_STD_GNU) != 0)
274 gfc_option.warn_std |= GFC_STD_GNU;
275 /* -std=legacy -pedantic is effectively -std=gnu. */
276 if (pedantic && (gfc_option.allow_std & GFC_STD_LEGACY) != 0)
277 gfc_option.warn_std |= GFC_STD_F95_OBS | GFC_STD_F95_DEL | GFC_STD_LEGACY;
279 /* If the user didn't explicitly specify -f(no)-second-underscore we
280 use it if we're trying to be compatible with f2c, and not
282 if (gfc_option.flag_second_underscore == -1)
283 gfc_option.flag_second_underscore = gfc_option.flag_f2c;
285 /* Implement -fno-automatic as -fmax-stack-var-size=0. */
286 if (!gfc_option.flag_automatic)
287 gfc_option.flag_max_stack_var_size = 0;
290 gfc_option.warn_ampersand = 1;
292 if (gfc_option.flag_all_intrinsics)
293 gfc_option.warn_nonstd_intrinsics = 0;
299 /* Set the options for -Wall. */
305 gfc_option.warn_aliasing = 1;
306 gfc_option.warn_ampersand = 1;
307 gfc_option.warn_line_truncation = 1;
308 gfc_option.warn_nonstd_intrinsics = 1;
309 gfc_option.warn_surprising = 1;
310 gfc_option.warn_tabs = 0;
311 gfc_option.warn_underflow = 1;
314 warn_return_type = 1;
317 /* We save the value of warn_uninitialized, since if they put
318 -Wuninitialized on the command line, we need to generate a
319 warning about not using it without also specifying -O. */
321 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, "/");
348 gfc_handle_fpe_trap_option (const char *arg)
350 int result, pos = 0, n;
351 static const char * const exception[] = { "invalid", "denormal", "zero",
352 "overflow", "underflow",
354 static const int opt_exception[] = { GFC_FPE_INVALID, GFC_FPE_DENORMAL,
355 GFC_FPE_ZERO, GFC_FPE_OVERFLOW,
356 GFC_FPE_UNDERFLOW, GFC_FPE_PRECISION,
363 while (arg[pos] && arg[pos] != ',')
366 for (n = 0; exception[n] != NULL; n++)
368 if (exception[n] && strncmp (exception[n], arg, pos) == 0)
370 gfc_option.fpe |= opt_exception[n];
378 gfc_fatal_error ("Argument to -ffpe-trap is not valid: %s", arg);
382 /* Handle command-line options. Returns 0 if unrecognized, 1 if
383 recognized and handled. */
385 gfc_handle_option (size_t scode, const char *arg, int value)
388 enum opt_code code = (enum opt_code) scode;
390 /* Ignore file names. */
405 gfc_option.warn_aliasing = value;
409 gfc_option.warn_ampersand = value;
412 case OPT_Wconversion:
413 gfc_option.warn_conversion = value;
416 case OPT_Wimplicit_interface:
417 gfc_option.warn_implicit_interface = value;
420 case OPT_Wline_truncation:
421 gfc_option.warn_line_truncation = value;
424 case OPT_Wsurprising:
425 gfc_option.warn_surprising = value;
429 gfc_option.warn_tabs = value;
433 gfc_option.warn_underflow = value;
436 case OPT_fall_intrinsics:
437 gfc_option.flag_all_intrinsics = 1;
441 gfc_option.flag_automatic = value;
445 gfc_option.flag_backslash = value;
448 case OPT_fcray_pointer:
449 gfc_option.flag_cray_pointer = value;
453 gfc_option.flag_f2c = value;
457 gfc_option.flag_dollar_ok = value;
460 case OPT_fexternal_blas:
461 gfc_option.flag_external_blas = value;
464 case OPT_fblas_matmul_limit_:
465 gfc_option.blas_matmul_limit = value;
468 case OPT_fd_lines_as_code:
469 gfc_option.flag_d_lines = 1;
472 case OPT_fd_lines_as_comments:
473 gfc_option.flag_d_lines = 0;
476 case OPT_fdump_parse_tree:
477 gfc_option.verbose = value;
480 case OPT_ffixed_form:
481 gfc_option.source_form = FORM_FIXED;
484 case OPT_ffixed_line_length_none:
485 gfc_option.fixed_line_length = 0;
488 case OPT_ffixed_line_length_:
489 if (value != 0 && value < 7)
490 gfc_fatal_error ("Fixed line length must be at least seven.");
491 gfc_option.fixed_line_length = value;
495 gfc_option.source_form = FORM_FREE;
499 gfc_option.flag_openmp = value;
502 case OPT_ffree_line_length_none:
503 gfc_option.free_line_length = 0;
506 case OPT_ffree_line_length_:
507 gfc_option.free_line_length = value;
510 case OPT_funderscoring:
511 gfc_option.flag_underscoring = value;
514 case OPT_fsecond_underscore:
515 gfc_option.flag_second_underscore = value;
518 case OPT_fimplicit_none:
519 gfc_option.flag_implicit_none = value;
522 case OPT_fintrinsic_modules_path:
523 gfc_add_include_path (arg, false);
524 gfc_add_intrinsic_modules_path (arg);
527 case OPT_fmax_errors_:
528 gfc_option.max_errors = value;
531 case OPT_fmax_stack_var_size_:
532 gfc_option.flag_max_stack_var_size = value;
535 case OPT_frange_check:
536 gfc_option.flag_range_check = value;
539 case OPT_fpack_derived:
540 gfc_option.flag_pack_derived = value;
543 case OPT_frepack_arrays:
544 gfc_option.flag_repack_arrays = value;
547 case OPT_fpreprocessed:
548 gfc_option.flag_preprocessed = value;
551 case OPT_fmax_identifier_length_:
552 if (value > GFC_MAX_SYMBOL_LEN)
553 gfc_fatal_error ("Maximum supported identifier length is %d",
555 gfc_option.max_identifier_length = value;
558 case OPT_fdefault_integer_8:
559 gfc_option.flag_default_integer = value;
562 case OPT_fdefault_real_8:
563 gfc_option.flag_default_real = value;
566 case OPT_fdefault_double_8:
567 gfc_option.flag_default_double = value;
571 gfc_add_include_path (arg, true);
576 gfc_handle_module_path_options (arg);
580 gfc_handle_fpe_trap_option (arg);
584 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95 | GFC_STD_F77;
585 gfc_option.warn_std = GFC_STD_F95_OBS;
586 gfc_option.max_identifier_length = 31;
587 gfc_option.warn_ampersand = 1;
588 gfc_option.warn_tabs = 0;
592 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
593 | GFC_STD_F2003 | GFC_STD_F95;
594 gfc_option.warn_std = GFC_STD_F95_OBS;
595 gfc_option.max_continue_fixed = 255;
596 gfc_option.max_continue_free = 255;
597 gfc_option.max_identifier_length = 63;
598 gfc_option.warn_ampersand = 1;
602 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
603 | GFC_STD_F77 | GFC_STD_F95 | GFC_STD_F2003
604 | GFC_STD_GNU | GFC_STD_LEGACY;
605 gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
610 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
611 | GFC_STD_F77 | GFC_STD_F95 | GFC_STD_F2003
612 | GFC_STD_GNU | GFC_STD_LEGACY;
613 gfc_option.warn_std = 0;
616 case OPT_Wnonstd_intrinsics:
617 gfc_option.warn_nonstd_intrinsics = value;
620 case OPT_fshort_enums:
621 gfc_option.fshort_enums = 1;
624 case OPT_fconvert_little_endian:
625 gfc_option.convert = CONVERT_LITTLE;
628 case OPT_fconvert_big_endian:
629 gfc_option.convert = CONVERT_BIG;
632 case OPT_fconvert_native:
633 gfc_option.convert = CONVERT_NATIVE;
636 case OPT_fconvert_swap:
637 gfc_option.convert = CONVERT_SWAP;
640 case OPT_frecord_marker_4:
641 gfc_option.record_marker = 4;
644 case OPT_frecord_marker_8:
645 gfc_option.record_marker = 8;
648 case OPT_fmax_subrecord_length_:
649 if (value > MAX_SUBRECORD_LENGTH)
650 gfc_fatal_error ("Maximum subrecord length cannot exceed %d", MAX_SUBRECORD_LENGTH);
652 gfc_option.max_subrecord_length = value;