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 flag_inline_trees = 1;
298 /* Use tree inlining. */
301 if (flag_inline_functions)
302 flag_inline_trees = 2;
304 /* If -pedantic, warn about the use of GNU extensions. */
305 if (pedantic && (gfc_option.allow_std & GFC_STD_GNU) != 0)
306 gfc_option.warn_std |= GFC_STD_GNU;
307 /* -std=legacy -pedantic is effectively -std=gnu. */
308 if (pedantic && (gfc_option.allow_std & GFC_STD_LEGACY) != 0)
309 gfc_option.warn_std |= GFC_STD_F95_OBS | GFC_STD_F95_DEL | GFC_STD_LEGACY;
311 /* If the user didn't explicitly specify -f(no)-second-underscore we
312 use it if we're trying to be compatible with f2c, and not
314 if (gfc_option.flag_second_underscore == -1)
315 gfc_option.flag_second_underscore = gfc_option.flag_f2c;
317 if (!gfc_option.flag_automatic && gfc_option.flag_max_stack_var_size != -2
318 && gfc_option.flag_max_stack_var_size != 0)
319 gfc_warning_now ("Flag -fno-automatic overwrites -fmax-stack-var-size=%d",
320 gfc_option.flag_max_stack_var_size);
321 else if (!gfc_option.flag_automatic && gfc_option.flag_recursive)
322 gfc_warning_now ("Flag -fno-automatic overwrites -frecursive");
323 else if (!gfc_option.flag_automatic && gfc_option.flag_openmp)
324 gfc_warning_now ("Flag -fno-automatic overwrites -frecursive implied by "
326 else if (gfc_option.flag_max_stack_var_size != -2
327 && gfc_option.flag_recursive)
328 gfc_warning_now ("Flag -frecursive overwrites -fmax-stack-var-size=%d",
329 gfc_option.flag_max_stack_var_size);
330 else if (gfc_option.flag_max_stack_var_size != -2
331 && gfc_option.flag_openmp)
332 gfc_warning_now ("Flag -fmax-stack-var-size=%d overwrites -frecursive "
333 "implied by -fopenmp",
334 gfc_option.flag_max_stack_var_size);
336 /* Implied -frecursive; implemented as -fmax-stack-var-size=-1. */
337 if (gfc_option.flag_max_stack_var_size == -2 && gfc_option.flag_openmp)
338 gfc_option.flag_max_stack_var_size = -1;
341 if (gfc_option.flag_max_stack_var_size == -2)
342 gfc_option.flag_max_stack_var_size = 32768;
344 /* Implement -frecursive as -fmax-stack-var-size=-1. */
345 if (gfc_option.flag_recursive)
346 gfc_option.flag_max_stack_var_size = -1;
348 /* Implement -fno-automatic as -fmax-stack-var-size=0. */
349 if (!gfc_option.flag_automatic)
350 gfc_option.flag_max_stack_var_size = 0;
354 gfc_option.warn_ampersand = 1;
355 gfc_option.warn_tabs = 0;
358 gfc_cpp_post_options ();
360 /* FIXME: return gfc_cpp_preprocess_only ();
362 The return value of this function indicates whether the
363 backend needs to be initialized. On -E, we don't need
364 the backend. However, if we return 'true' here, an
365 ICE occurs. Initializing the backend doesn't hurt much,
366 hence, for now we can live with it as is. */
371 /* Set the options for -Wall. */
374 set_Wall (int setting)
376 gfc_option.warn_aliasing = setting;
377 gfc_option.warn_ampersand = setting;
378 gfc_option.warn_line_truncation = setting;
379 gfc_option.warn_surprising = setting;
380 gfc_option.warn_tabs = !setting;
381 gfc_option.warn_underflow = setting;
382 gfc_option.warn_intrinsic_shadow = setting;
383 gfc_option.warn_intrinsics_std = setting;
384 gfc_option.warn_character_truncation = setting;
386 set_Wunused (setting);
387 warn_return_type = setting;
388 warn_switch = setting;
390 /* We save the value of warn_uninitialized, since if they put
391 -Wuninitialized on the command line, we need to generate a
392 warning about not using it without also specifying -O. */
394 warn_uninitialized = 0;
395 else if (warn_uninitialized != 1)
396 warn_uninitialized = 2;
401 gfc_handle_module_path_options (const char *arg)
404 if (gfc_option.module_dir != NULL)
405 gfc_fatal_error ("gfortran: Only one -J option allowed");
407 gfc_option.module_dir = (char *) gfc_getmem (strlen (arg) + 2);
408 strcpy (gfc_option.module_dir, arg);
409 strcat (gfc_option.module_dir, "/");
411 gfc_add_include_path (gfc_option.module_dir, true);
416 gfc_handle_fpe_trap_option (const char *arg)
418 int result, pos = 0, n;
419 static const char * const exception[] = { "invalid", "denormal", "zero",
420 "overflow", "underflow",
422 static const int opt_exception[] = { GFC_FPE_INVALID, GFC_FPE_DENORMAL,
423 GFC_FPE_ZERO, GFC_FPE_OVERFLOW,
424 GFC_FPE_UNDERFLOW, GFC_FPE_PRECISION,
432 while (arg[pos] && arg[pos] != ',')
436 for (n = 0; exception[n] != NULL; n++)
438 if (exception[n] && strncmp (exception[n], arg, pos) == 0)
440 gfc_option.fpe |= opt_exception[n];
448 gfc_fatal_error ("Argument to -ffpe-trap is not valid: %s", arg);
453 /* Handle command-line options. Returns 0 if unrecognized, 1 if
454 recognized and handled. */
457 gfc_handle_option (size_t scode, const char *arg, int value)
460 enum opt_code code = (enum opt_code) scode;
462 /* Ignore file names. */
466 if (gfc_cpp_handle_option (scode, arg, value) == 1)
480 gfc_option.warn_aliasing = value;
484 gfc_option.warn_ampersand = value;
487 case OPT_Warray_temporaries:
488 gfc_option.warn_array_temp = value;
491 case OPT_Wcharacter_truncation:
492 gfc_option.warn_character_truncation = value;
495 case OPT_Wconversion:
496 gfc_option.warn_conversion = value;
499 case OPT_Wimplicit_interface:
500 gfc_option.warn_implicit_interface = value;
503 case OPT_Wline_truncation:
504 gfc_option.warn_line_truncation = value;
507 case OPT_Wreturn_type:
508 warn_return_type = value;
511 case OPT_Wsurprising:
512 gfc_option.warn_surprising = value;
516 gfc_option.warn_tabs = value;
520 gfc_option.warn_underflow = value;
523 case OPT_Wintrinsic_shadow:
524 gfc_option.warn_intrinsic_shadow = value;
527 case OPT_fall_intrinsics:
528 gfc_option.flag_all_intrinsics = 1;
532 gfc_option.flag_automatic = value;
535 case OPT_fallow_leading_underscore:
536 gfc_option.flag_allow_leading_underscore = value;
540 gfc_option.flag_backslash = value;
544 gfc_option.flag_backtrace = value;
548 gfc_option.flag_dump_core = value;
551 case OPT_fcray_pointer:
552 gfc_option.flag_cray_pointer = value;
556 gfc_option.flag_f2c = value;
560 gfc_option.flag_dollar_ok = value;
563 case OPT_fexternal_blas:
564 gfc_option.flag_external_blas = value;
567 case OPT_fblas_matmul_limit_:
568 gfc_option.blas_matmul_limit = value;
571 case OPT_fd_lines_as_code:
572 gfc_option.flag_d_lines = 1;
575 case OPT_fd_lines_as_comments:
576 gfc_option.flag_d_lines = 0;
579 case OPT_fdump_parse_tree:
580 gfc_option.dump_parse_tree = value;
583 case OPT_ffixed_form:
584 gfc_option.source_form = FORM_FIXED;
587 case OPT_ffixed_line_length_none:
588 gfc_option.fixed_line_length = 0;
591 case OPT_ffixed_line_length_:
592 if (value != 0 && value < 7)
593 gfc_fatal_error ("Fixed line length must be at least seven.");
594 gfc_option.fixed_line_length = value;
598 gfc_option.source_form = FORM_FREE;
602 gfc_option.flag_openmp = value;
605 case OPT_ffree_line_length_none:
606 gfc_option.free_line_length = 0;
609 case OPT_ffree_line_length_:
610 if (value != 0 && value < 4)
611 gfc_fatal_error ("Free line length must be at least three.");
612 gfc_option.free_line_length = value;
615 case OPT_funderscoring:
616 gfc_option.flag_underscoring = value;
619 case OPT_fsecond_underscore:
620 gfc_option.flag_second_underscore = value;
623 case OPT_static_libgfortran:
624 #ifndef HAVE_LD_STATIC_DYNAMIC
625 gfc_fatal_error ("-static-libgfortran is not supported in this "
630 case OPT_fimplicit_none:
631 gfc_option.flag_implicit_none = value;
634 case OPT_fintrinsic_modules_path:
635 gfc_add_include_path (arg, false);
636 gfc_add_intrinsic_modules_path (arg);
639 case OPT_fmax_errors_:
640 gfc_option.max_errors = value;
643 case OPT_fmax_stack_var_size_:
644 gfc_option.flag_max_stack_var_size = value;
647 case OPT_fmodule_private:
648 gfc_option.flag_module_private = value;
651 case OPT_frange_check:
652 gfc_option.flag_range_check = value;
655 case OPT_fpack_derived:
656 gfc_option.flag_pack_derived = value;
659 case OPT_frepack_arrays:
660 gfc_option.flag_repack_arrays = value;
663 case OPT_fpreprocessed:
664 gfc_option.flag_preprocessed = value;
667 case OPT_fmax_identifier_length_:
668 if (value > GFC_MAX_SYMBOL_LEN)
669 gfc_fatal_error ("Maximum supported identifier length is %d",
671 gfc_option.max_identifier_length = value;
674 case OPT_fdefault_integer_8:
675 gfc_option.flag_default_integer = value;
678 case OPT_fdefault_real_8:
679 gfc_option.flag_default_real = value;
682 case OPT_fdefault_double_8:
683 gfc_option.flag_default_double = value;
686 case OPT_finit_local_zero:
687 gfc_option.flag_init_integer = GFC_INIT_INTEGER_ON;
688 gfc_option.flag_init_integer_value = 0;
689 gfc_option.flag_init_real = GFC_INIT_REAL_ZERO;
690 gfc_option.flag_init_logical = GFC_INIT_LOGICAL_FALSE;
691 gfc_option.flag_init_character = GFC_INIT_CHARACTER_ON;
692 gfc_option.flag_init_character_value = (char)0;
695 case OPT_finit_logical_:
696 if (!strcasecmp (arg, "false"))
697 gfc_option.flag_init_logical = GFC_INIT_LOGICAL_FALSE;
698 else if (!strcasecmp (arg, "true"))
699 gfc_option.flag_init_logical = GFC_INIT_LOGICAL_TRUE;
701 gfc_fatal_error ("Unrecognized option to -finit-logical: %s",
705 case OPT_finit_real_:
706 if (!strcasecmp (arg, "zero"))
707 gfc_option.flag_init_real = GFC_INIT_REAL_ZERO;
708 else if (!strcasecmp (arg, "nan"))
709 gfc_option.flag_init_real = GFC_INIT_REAL_NAN;
710 else if (!strcasecmp (arg, "inf"))
711 gfc_option.flag_init_real = GFC_INIT_REAL_INF;
712 else if (!strcasecmp (arg, "-inf"))
713 gfc_option.flag_init_real = GFC_INIT_REAL_NEG_INF;
715 gfc_fatal_error ("Unrecognized option to -finit-real: %s",
719 case OPT_finit_integer_:
720 gfc_option.flag_init_integer = GFC_INIT_INTEGER_ON;
721 gfc_option.flag_init_integer_value = atoi (arg);
724 case OPT_finit_character_:
725 if (value >= 0 && value <= 127)
727 gfc_option.flag_init_character = GFC_INIT_CHARACTER_ON;
728 gfc_option.flag_init_character_value = (char)value;
731 gfc_fatal_error ("The value of n in -finit-character=n must be "
732 "between 0 and 127");
736 gfc_add_include_path (arg, true);
740 gfc_handle_module_path_options (arg);
744 gfc_option.flag_sign_zero = value;
748 gfc_handle_fpe_trap_option (arg);
752 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95 | GFC_STD_F77;
753 gfc_option.warn_std = GFC_STD_F95_OBS;
754 gfc_option.max_continue_fixed = 19;
755 gfc_option.max_continue_free = 39;
756 gfc_option.max_identifier_length = 31;
757 gfc_option.warn_ampersand = 1;
758 gfc_option.warn_tabs = 0;
762 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
763 | GFC_STD_F2003 | GFC_STD_F95;
764 gfc_option.warn_std = GFC_STD_F95_OBS;
765 gfc_option.max_identifier_length = 63;
766 gfc_option.warn_ampersand = 1;
767 gfc_option.warn_tabs = 0;
771 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
772 | GFC_STD_F2003 | GFC_STD_F95 | GFC_STD_F2008;
773 gfc_option.warn_std = GFC_STD_F95_OBS;
774 gfc_option.max_identifier_length = 63;
775 gfc_option.warn_ampersand = 1;
776 gfc_option.warn_tabs = 0;
780 set_default_std_flags ();
784 set_default_std_flags ();
785 gfc_option.warn_std = 0;
788 case OPT_Wintrinsics_std:
789 gfc_option.warn_intrinsics_std = value;
792 case OPT_fshort_enums:
793 gfc_option.fshort_enums = 1;
796 case OPT_fconvert_little_endian:
797 gfc_option.convert = GFC_CONVERT_LITTLE;
800 case OPT_fconvert_big_endian:
801 gfc_option.convert = GFC_CONVERT_BIG;
804 case OPT_fconvert_native:
805 gfc_option.convert = GFC_CONVERT_NATIVE;
808 case OPT_fconvert_swap:
809 gfc_option.convert = GFC_CONVERT_SWAP;
812 case OPT_frecord_marker_4:
813 gfc_option.record_marker = 4;
816 case OPT_frecord_marker_8:
817 gfc_option.record_marker = 8;
820 case OPT_fmax_subrecord_length_:
821 if (value > MAX_SUBRECORD_LENGTH)
822 gfc_fatal_error ("Maximum subrecord length cannot exceed %d",
823 MAX_SUBRECORD_LENGTH);
825 gfc_option.max_subrecord_length = value;
829 gfc_option.flag_recursive = 1;