1 /* Parse and display command line options.
2 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
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 3, 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 COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
24 #include "coretypes.h"
31 #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_F2008 | GFC_STD_F95 | GFC_STD_F77
47 | GFC_STD_GNU | GFC_STD_LEGACY;
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, const char **argv)
56 gfc_source_file = NULL;
57 gfc_option.module_dir = NULL;
58 gfc_option.source_form = FORM_UNKNOWN;
59 gfc_option.fixed_line_length = 72;
60 gfc_option.free_line_length = 132;
61 gfc_option.max_continue_fixed = 255;
62 gfc_option.max_continue_free = 255;
63 gfc_option.max_identifier_length = GFC_MAX_SYMBOL_LEN;
64 gfc_option.max_subrecord_length = 0;
65 gfc_option.convert = GFC_CONVERT_NATIVE;
66 gfc_option.record_marker = 0;
67 gfc_option.dump_parse_tree = 0;
69 gfc_option.warn_aliasing = 0;
70 gfc_option.warn_ampersand = 0;
71 gfc_option.warn_character_truncation = 0;
72 gfc_option.warn_array_temp = 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.warn_intrinsic_shadow = 0;
80 gfc_option.warn_intrinsics_std = 0;
81 gfc_option.max_errors = 25;
83 gfc_option.flag_all_intrinsics = 0;
84 gfc_option.flag_default_double = 0;
85 gfc_option.flag_default_integer = 0;
86 gfc_option.flag_default_real = 0;
87 gfc_option.flag_dollar_ok = 0;
88 gfc_option.flag_underscoring = 1;
89 gfc_option.flag_f2c = 0;
90 gfc_option.flag_second_underscore = -1;
91 gfc_option.flag_implicit_none = 0;
93 /* Default value of flag_max_stack_var_size is set in gfc_post_options. */
94 gfc_option.flag_max_stack_var_size = -2;
96 gfc_option.flag_range_check = 1;
97 gfc_option.flag_pack_derived = 0;
98 gfc_option.flag_repack_arrays = 0;
99 gfc_option.flag_preprocessed = 0;
100 gfc_option.flag_automatic = 1;
101 gfc_option.flag_backslash = 0;
102 gfc_option.flag_module_private = 0;
103 gfc_option.flag_backtrace = 0;
104 gfc_option.flag_allow_leading_underscore = 0;
105 gfc_option.flag_dump_core = 0;
106 gfc_option.flag_external_blas = 0;
107 gfc_option.blas_matmul_limit = 30;
108 gfc_option.flag_cray_pointer = 0;
109 gfc_option.flag_d_lines = -1;
110 gfc_option.flag_openmp = 0;
111 gfc_option.flag_sign_zero = 1;
112 gfc_option.flag_recursive = 0;
113 gfc_option.flag_init_integer = GFC_INIT_INTEGER_OFF;
114 gfc_option.flag_init_integer_value = 0;
115 gfc_option.flag_init_real = GFC_INIT_REAL_OFF;
116 gfc_option.flag_init_logical = GFC_INIT_LOGICAL_OFF;
117 gfc_option.flag_init_character = GFC_INIT_CHARACTER_OFF;
118 gfc_option.flag_init_character_value = (char)0;
122 /* Argument pointers cannot point to anything but their argument. */
123 flag_argument_noalias = 3;
127 set_default_std_flags ();
129 /* -fshort-enums can be default on some targets. */
130 gfc_option.fshort_enums = targetm.default_short_enums ();
132 /* Initialize cpp-related options. */
133 gfc_cpp_init_options(argc, argv);
139 /* Determine the source form from the filename extension. We assume
140 case insensitivity. */
142 static gfc_source_form
143 form_from_filename (const char *filename)
147 const char *extension;
148 gfc_source_form form;
175 }; /* sentinel value */
177 gfc_source_form f_form;
181 /* Find end of file name. Note, filename is either a NULL pointer or
182 a NUL terminated string. */
184 while (filename[i] != '\0')
187 /* Find last period. */
188 while (i >= 0 && (filename[i] != '.'))
191 /* Did we see a file extension? */
193 return FORM_UNKNOWN; /* Nope */
195 /* Get file extension and compare it to others. */
196 fileext = &(filename[i]);
199 f_form = FORM_UNKNOWN;
203 if (strcasecmp (fileext, exttype[i].extension) == 0)
205 f_form = exttype[i].form;
209 while (exttype[i].form != FORM_UNKNOWN);
215 /* Finalize commandline options. */
218 gfc_post_options (const char **pfilename)
220 const char *filename = *pfilename, *canon_source_file = NULL;
224 /* Issue an error if -fwhole-program was used. */
225 if (flag_whole_program)
226 gfc_fatal_error ("Option -fwhole-program is not supported for Fortran");
228 /* Verify the input file name. */
229 if (!filename || strcmp (filename, "-") == 0)
234 if (gfc_option.flag_preprocessed)
236 /* For preprocessed files, if the first tokens are of the form # NUM.
237 handle the directives so we know the original file name. */
238 gfc_source_file = gfc_read_orig_filename (filename, &canon_source_file);
239 if (gfc_source_file == NULL)
240 gfc_source_file = filename;
242 *pfilename = gfc_source_file;
245 gfc_source_file = filename;
247 if (canon_source_file == NULL)
248 canon_source_file = gfc_source_file;
250 /* Adds the path where the source file is to the list of include files. */
252 i = strlen (canon_source_file);
253 while (i > 0 && !IS_DIR_SEPARATOR (canon_source_file[i]))
258 source_path = (char *) alloca (i + 1);
259 memcpy (source_path, canon_source_file, i);
261 gfc_add_include_path (source_path, true);
264 gfc_add_include_path (".", true);
266 if (canon_source_file != gfc_source_file)
267 gfc_free (CONST_CAST (char *, canon_source_file));
269 /* Decide which form the file will be read in as. */
271 if (gfc_option.source_form != FORM_UNKNOWN)
272 gfc_current_form = gfc_option.source_form;
275 gfc_current_form = form_from_filename (filename);
277 if (gfc_current_form == FORM_UNKNOWN)
279 gfc_current_form = FORM_FREE;
280 gfc_warning_now ("Reading file '%s' as free form",
281 (filename[0] == '\0') ? "<stdin>" : filename);
285 /* If the user specified -fd-lines-as-{code|comments} verify that we're
287 if (gfc_current_form == FORM_FREE)
289 if (gfc_option.flag_d_lines == 0)
290 gfc_warning_now ("'-fd-lines-as-comments' has no effect "
292 else if (gfc_option.flag_d_lines == 1)
293 gfc_warning_now ("'-fd-lines-as-code' has no effect in free form");
296 /* Use tree inlining. */
300 /* If -pedantic, warn about the use of GNU extensions. */
301 if (pedantic && (gfc_option.allow_std & GFC_STD_GNU) != 0)
302 gfc_option.warn_std |= GFC_STD_GNU;
303 /* -std=legacy -pedantic is effectively -std=gnu. */
304 if (pedantic && (gfc_option.allow_std & GFC_STD_LEGACY) != 0)
305 gfc_option.warn_std |= GFC_STD_F95_OBS | GFC_STD_F95_DEL | GFC_STD_LEGACY;
307 /* If the user didn't explicitly specify -f(no)-second-underscore we
308 use it if we're trying to be compatible with f2c, and not
310 if (gfc_option.flag_second_underscore == -1)
311 gfc_option.flag_second_underscore = gfc_option.flag_f2c;
313 if (!gfc_option.flag_automatic && gfc_option.flag_max_stack_var_size != -2
314 && gfc_option.flag_max_stack_var_size != 0)
315 gfc_warning_now ("Flag -fno-automatic overwrites -fmax-stack-var-size=%d",
316 gfc_option.flag_max_stack_var_size);
317 else if (!gfc_option.flag_automatic && gfc_option.flag_recursive)
318 gfc_warning_now ("Flag -fno-automatic overwrites -frecursive");
319 else if (!gfc_option.flag_automatic && gfc_option.flag_openmp)
320 gfc_warning_now ("Flag -fno-automatic overwrites -frecursive implied by "
322 else if (gfc_option.flag_max_stack_var_size != -2
323 && gfc_option.flag_recursive)
324 gfc_warning_now ("Flag -frecursive overwrites -fmax-stack-var-size=%d",
325 gfc_option.flag_max_stack_var_size);
326 else if (gfc_option.flag_max_stack_var_size != -2
327 && gfc_option.flag_openmp)
328 gfc_warning_now ("Flag -fmax-stack-var-size=%d overwrites -frecursive "
329 "implied by -fopenmp",
330 gfc_option.flag_max_stack_var_size);
332 /* Implied -frecursive; implemented as -fmax-stack-var-size=-1. */
333 if (gfc_option.flag_max_stack_var_size == -2 && gfc_option.flag_openmp)
334 gfc_option.flag_max_stack_var_size = -1;
337 if (gfc_option.flag_max_stack_var_size == -2)
338 gfc_option.flag_max_stack_var_size = 32768;
340 /* Implement -frecursive as -fmax-stack-var-size=-1. */
341 if (gfc_option.flag_recursive)
342 gfc_option.flag_max_stack_var_size = -1;
344 /* Implement -fno-automatic as -fmax-stack-var-size=0. */
345 if (!gfc_option.flag_automatic)
346 gfc_option.flag_max_stack_var_size = 0;
350 gfc_option.warn_ampersand = 1;
351 gfc_option.warn_tabs = 0;
354 gfc_cpp_post_options ();
356 /* FIXME: return gfc_cpp_preprocess_only ();
358 The return value of this function indicates whether the
359 backend needs to be initialized. On -E, we don't need
360 the backend. However, if we return 'true' here, an
361 ICE occurs. Initializing the backend doesn't hurt much,
362 hence, for now we can live with it as is. */
367 /* Set the options for -Wall. */
370 set_Wall (int setting)
372 gfc_option.warn_aliasing = setting;
373 gfc_option.warn_ampersand = setting;
374 gfc_option.warn_line_truncation = setting;
375 gfc_option.warn_surprising = setting;
376 gfc_option.warn_tabs = !setting;
377 gfc_option.warn_underflow = setting;
378 gfc_option.warn_intrinsic_shadow = setting;
379 gfc_option.warn_intrinsics_std = setting;
380 gfc_option.warn_character_truncation = setting;
382 set_Wunused (setting);
383 warn_return_type = setting;
384 warn_switch = setting;
386 /* We save the value of warn_uninitialized, since if they put
387 -Wuninitialized on the command line, we need to generate a
388 warning about not using it without also specifying -O. */
390 warn_uninitialized = 0;
391 else if (warn_uninitialized != 1)
392 warn_uninitialized = 2;
397 gfc_handle_module_path_options (const char *arg)
400 if (gfc_option.module_dir != NULL)
401 gfc_fatal_error ("gfortran: Only one -J option allowed");
403 gfc_option.module_dir = (char *) gfc_getmem (strlen (arg) + 2);
404 strcpy (gfc_option.module_dir, arg);
405 strcat (gfc_option.module_dir, "/");
407 gfc_add_include_path (gfc_option.module_dir, true);
412 gfc_handle_fpe_trap_option (const char *arg)
414 int result, pos = 0, n;
415 static const char * const exception[] = { "invalid", "denormal", "zero",
416 "overflow", "underflow",
418 static const int opt_exception[] = { GFC_FPE_INVALID, GFC_FPE_DENORMAL,
419 GFC_FPE_ZERO, GFC_FPE_OVERFLOW,
420 GFC_FPE_UNDERFLOW, GFC_FPE_PRECISION,
428 while (arg[pos] && arg[pos] != ',')
432 for (n = 0; exception[n] != NULL; n++)
434 if (exception[n] && strncmp (exception[n], arg, pos) == 0)
436 gfc_option.fpe |= opt_exception[n];
444 gfc_fatal_error ("Argument to -ffpe-trap is not valid: %s", arg);
449 /* Handle command-line options. Returns 0 if unrecognized, 1 if
450 recognized and handled. */
453 gfc_handle_option (size_t scode, const char *arg, int value)
456 enum opt_code code = (enum opt_code) scode;
458 /* Ignore file names. */
462 if (gfc_cpp_handle_option (scode, arg, value) == 1)
476 gfc_option.warn_aliasing = value;
480 gfc_option.warn_ampersand = value;
483 case OPT_Warray_temporaries:
484 gfc_option.warn_array_temp = value;
487 case OPT_Wcharacter_truncation:
488 gfc_option.warn_character_truncation = value;
491 case OPT_Wconversion:
492 gfc_option.warn_conversion = value;
495 case OPT_Wimplicit_interface:
496 gfc_option.warn_implicit_interface = value;
499 case OPT_Wline_truncation:
500 gfc_option.warn_line_truncation = value;
503 case OPT_Wreturn_type:
504 warn_return_type = value;
507 case OPT_Wsurprising:
508 gfc_option.warn_surprising = value;
512 gfc_option.warn_tabs = value;
516 gfc_option.warn_underflow = value;
519 case OPT_Wintrinsic_shadow:
520 gfc_option.warn_intrinsic_shadow = value;
523 case OPT_fall_intrinsics:
524 gfc_option.flag_all_intrinsics = 1;
528 gfc_option.flag_automatic = value;
531 case OPT_fallow_leading_underscore:
532 gfc_option.flag_allow_leading_underscore = value;
536 gfc_option.flag_backslash = value;
540 gfc_option.flag_backtrace = value;
544 gfc_option.flag_dump_core = value;
547 case OPT_fcray_pointer:
548 gfc_option.flag_cray_pointer = value;
552 gfc_option.flag_f2c = value;
556 gfc_option.flag_dollar_ok = value;
559 case OPT_fexternal_blas:
560 gfc_option.flag_external_blas = value;
563 case OPT_fblas_matmul_limit_:
564 gfc_option.blas_matmul_limit = value;
567 case OPT_fd_lines_as_code:
568 gfc_option.flag_d_lines = 1;
571 case OPT_fd_lines_as_comments:
572 gfc_option.flag_d_lines = 0;
575 case OPT_fdump_parse_tree:
576 gfc_option.dump_parse_tree = value;
579 case OPT_ffixed_form:
580 gfc_option.source_form = FORM_FIXED;
583 case OPT_ffixed_line_length_none:
584 gfc_option.fixed_line_length = 0;
587 case OPT_ffixed_line_length_:
588 if (value != 0 && value < 7)
589 gfc_fatal_error ("Fixed line length must be at least seven.");
590 gfc_option.fixed_line_length = value;
594 gfc_option.source_form = FORM_FREE;
598 gfc_option.flag_openmp = value;
601 case OPT_ffree_line_length_none:
602 gfc_option.free_line_length = 0;
605 case OPT_ffree_line_length_:
606 if (value != 0 && value < 4)
607 gfc_fatal_error ("Free line length must be at least three.");
608 gfc_option.free_line_length = value;
611 case OPT_funderscoring:
612 gfc_option.flag_underscoring = value;
615 case OPT_fsecond_underscore:
616 gfc_option.flag_second_underscore = value;
619 case OPT_static_libgfortran:
620 #ifndef HAVE_LD_STATIC_DYNAMIC
621 gfc_fatal_error ("-static-libgfortran is not supported in this "
626 case OPT_fimplicit_none:
627 gfc_option.flag_implicit_none = value;
630 case OPT_fintrinsic_modules_path:
631 gfc_add_include_path (arg, false);
632 gfc_add_intrinsic_modules_path (arg);
635 case OPT_fmax_errors_:
636 gfc_option.max_errors = value;
639 case OPT_fmax_stack_var_size_:
640 gfc_option.flag_max_stack_var_size = value;
643 case OPT_fmodule_private:
644 gfc_option.flag_module_private = value;
647 case OPT_frange_check:
648 gfc_option.flag_range_check = value;
651 case OPT_fpack_derived:
652 gfc_option.flag_pack_derived = value;
655 case OPT_frepack_arrays:
656 gfc_option.flag_repack_arrays = value;
659 case OPT_fpreprocessed:
660 gfc_option.flag_preprocessed = value;
663 case OPT_fmax_identifier_length_:
664 if (value > GFC_MAX_SYMBOL_LEN)
665 gfc_fatal_error ("Maximum supported identifier length is %d",
667 gfc_option.max_identifier_length = value;
670 case OPT_fdefault_integer_8:
671 gfc_option.flag_default_integer = value;
674 case OPT_fdefault_real_8:
675 gfc_option.flag_default_real = value;
678 case OPT_fdefault_double_8:
679 gfc_option.flag_default_double = value;
682 case OPT_finit_local_zero:
683 gfc_option.flag_init_integer = GFC_INIT_INTEGER_ON;
684 gfc_option.flag_init_integer_value = 0;
685 gfc_option.flag_init_real = GFC_INIT_REAL_ZERO;
686 gfc_option.flag_init_logical = GFC_INIT_LOGICAL_FALSE;
687 gfc_option.flag_init_character = GFC_INIT_CHARACTER_ON;
688 gfc_option.flag_init_character_value = (char)0;
691 case OPT_finit_logical_:
692 if (!strcasecmp (arg, "false"))
693 gfc_option.flag_init_logical = GFC_INIT_LOGICAL_FALSE;
694 else if (!strcasecmp (arg, "true"))
695 gfc_option.flag_init_logical = GFC_INIT_LOGICAL_TRUE;
697 gfc_fatal_error ("Unrecognized option to -finit-logical: %s",
701 case OPT_finit_real_:
702 if (!strcasecmp (arg, "zero"))
703 gfc_option.flag_init_real = GFC_INIT_REAL_ZERO;
704 else if (!strcasecmp (arg, "nan"))
705 gfc_option.flag_init_real = GFC_INIT_REAL_NAN;
706 else if (!strcasecmp (arg, "inf"))
707 gfc_option.flag_init_real = GFC_INIT_REAL_INF;
708 else if (!strcasecmp (arg, "-inf"))
709 gfc_option.flag_init_real = GFC_INIT_REAL_NEG_INF;
711 gfc_fatal_error ("Unrecognized option to -finit-real: %s",
715 case OPT_finit_integer_:
716 gfc_option.flag_init_integer = GFC_INIT_INTEGER_ON;
717 gfc_option.flag_init_integer_value = atoi (arg);
720 case OPT_finit_character_:
721 if (value >= 0 && value <= 127)
723 gfc_option.flag_init_character = GFC_INIT_CHARACTER_ON;
724 gfc_option.flag_init_character_value = (char)value;
727 gfc_fatal_error ("The value of n in -finit-character=n must be "
728 "between 0 and 127");
732 gfc_add_include_path (arg, true);
736 gfc_handle_module_path_options (arg);
740 gfc_option.flag_sign_zero = value;
744 gfc_handle_fpe_trap_option (arg);
748 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95 | GFC_STD_F77;
749 gfc_option.warn_std = GFC_STD_F95_OBS;
750 gfc_option.max_continue_fixed = 19;
751 gfc_option.max_continue_free = 39;
752 gfc_option.max_identifier_length = 31;
753 gfc_option.warn_ampersand = 1;
754 gfc_option.warn_tabs = 0;
758 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
759 | GFC_STD_F2003 | GFC_STD_F95;
760 gfc_option.warn_std = GFC_STD_F95_OBS;
761 gfc_option.max_identifier_length = 63;
762 gfc_option.warn_ampersand = 1;
763 gfc_option.warn_tabs = 0;
767 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
768 | GFC_STD_F2003 | GFC_STD_F95 | GFC_STD_F2008;
769 gfc_option.warn_std = GFC_STD_F95_OBS;
770 gfc_option.max_identifier_length = 63;
771 gfc_option.warn_ampersand = 1;
772 gfc_option.warn_tabs = 0;
776 set_default_std_flags ();
780 set_default_std_flags ();
781 gfc_option.warn_std = 0;
784 case OPT_Wintrinsics_std:
785 gfc_option.warn_intrinsics_std = value;
788 case OPT_fshort_enums:
789 gfc_option.fshort_enums = 1;
792 case OPT_fconvert_little_endian:
793 gfc_option.convert = GFC_CONVERT_LITTLE;
796 case OPT_fconvert_big_endian:
797 gfc_option.convert = GFC_CONVERT_BIG;
800 case OPT_fconvert_native:
801 gfc_option.convert = GFC_CONVERT_NATIVE;
804 case OPT_fconvert_swap:
805 gfc_option.convert = GFC_CONVERT_SWAP;
808 case OPT_frecord_marker_4:
809 gfc_option.record_marker = 4;
812 case OPT_frecord_marker_8:
813 gfc_option.record_marker = 8;
816 case OPT_fmax_subrecord_length_:
817 if (value > MAX_SUBRECORD_LENGTH)
818 gfc_fatal_error ("Maximum subrecord length cannot exceed %d",
819 MAX_SUBRECORD_LENGTH);
821 gfc_option.max_subrecord_length = value;
825 gfc_option.flag_recursive = 1;