1 /* Parse and display command line options.
2 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
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. Keep in sync with
41 libgfortran/runtime/compile_options.c (init_compile_options). */
44 set_default_std_flags (void)
46 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
47 | GFC_STD_F2003 | GFC_STD_F2008 | GFC_STD_F95 | GFC_STD_F77
48 | GFC_STD_GNU | GFC_STD_LEGACY;
49 gfc_option.warn_std = GFC_STD_F95_DEL | GFC_STD_LEGACY;
53 /* Get ready for options handling. Keep in sync with
54 libgfortran/runtime/compile_options.c (init_compile_options). */
57 gfc_init_options (unsigned int argc, const char **argv)
59 gfc_source_file = NULL;
60 gfc_option.module_dir = NULL;
61 gfc_option.source_form = FORM_UNKNOWN;
62 gfc_option.fixed_line_length = 72;
63 gfc_option.free_line_length = 132;
64 gfc_option.max_continue_fixed = 255;
65 gfc_option.max_continue_free = 255;
66 gfc_option.max_identifier_length = GFC_MAX_SYMBOL_LEN;
67 gfc_option.max_subrecord_length = 0;
68 gfc_option.flag_max_array_constructor = 65535;
69 gfc_option.convert = GFC_CONVERT_NATIVE;
70 gfc_option.record_marker = 0;
71 gfc_option.dump_parse_tree = 0;
73 gfc_option.warn_aliasing = 0;
74 gfc_option.warn_ampersand = 0;
75 gfc_option.warn_character_truncation = 0;
76 gfc_option.warn_array_temp = 0;
77 gfc_option.warn_conversion = 0;
78 gfc_option.warn_implicit_interface = 0;
79 gfc_option.warn_line_truncation = 0;
80 gfc_option.warn_surprising = 0;
81 gfc_option.warn_tabs = 1;
82 gfc_option.warn_underflow = 1;
83 gfc_option.warn_intrinsic_shadow = 0;
84 gfc_option.warn_intrinsics_std = 0;
85 gfc_option.warn_align_commons = 1;
86 gfc_option.max_errors = 25;
88 gfc_option.flag_all_intrinsics = 0;
89 gfc_option.flag_default_double = 0;
90 gfc_option.flag_default_integer = 0;
91 gfc_option.flag_default_real = 0;
92 gfc_option.flag_dollar_ok = 0;
93 gfc_option.flag_underscoring = 1;
94 gfc_option.flag_f2c = 0;
95 gfc_option.flag_second_underscore = -1;
96 gfc_option.flag_implicit_none = 0;
98 /* Default value of flag_max_stack_var_size is set in gfc_post_options. */
99 gfc_option.flag_max_stack_var_size = -2;
101 gfc_option.flag_range_check = 1;
102 gfc_option.flag_pack_derived = 0;
103 gfc_option.flag_repack_arrays = 0;
104 gfc_option.flag_preprocessed = 0;
105 gfc_option.flag_automatic = 1;
106 gfc_option.flag_backslash = 0;
107 gfc_option.flag_module_private = 0;
108 gfc_option.flag_backtrace = 0;
109 gfc_option.flag_allow_leading_underscore = 0;
110 gfc_option.flag_dump_core = 0;
111 gfc_option.flag_external_blas = 0;
112 gfc_option.blas_matmul_limit = 30;
113 gfc_option.flag_cray_pointer = 0;
114 gfc_option.flag_d_lines = -1;
115 gfc_option.flag_openmp = 0;
116 gfc_option.flag_sign_zero = 1;
117 gfc_option.flag_recursive = 0;
118 gfc_option.flag_init_integer = GFC_INIT_INTEGER_OFF;
119 gfc_option.flag_init_integer_value = 0;
120 gfc_option.flag_init_real = GFC_INIT_REAL_OFF;
121 gfc_option.flag_init_logical = GFC_INIT_LOGICAL_OFF;
122 gfc_option.flag_init_character = GFC_INIT_CHARACTER_OFF;
123 gfc_option.flag_init_character_value = (char)0;
124 gfc_option.flag_align_commons = 1;
127 gfc_option.rtcheck = 0;
129 /* Argument pointers cannot point to anything but their argument. */
130 flag_argument_noalias = 3;
134 set_default_std_flags ();
136 /* -fshort-enums can be default on some targets. */
137 gfc_option.fshort_enums = targetm.default_short_enums ();
139 /* Initialize cpp-related options. */
140 gfc_cpp_init_options(argc, argv);
146 /* Determine the source form from the filename extension. We assume
147 case insensitivity. */
149 static gfc_source_form
150 form_from_filename (const char *filename)
154 const char *extension;
155 gfc_source_form form;
182 }; /* sentinel value */
184 gfc_source_form f_form;
188 /* Find end of file name. Note, filename is either a NULL pointer or
189 a NUL terminated string. */
191 while (filename[i] != '\0')
194 /* Find last period. */
195 while (i >= 0 && (filename[i] != '.'))
198 /* Did we see a file extension? */
200 return FORM_UNKNOWN; /* Nope */
202 /* Get file extension and compare it to others. */
203 fileext = &(filename[i]);
206 f_form = FORM_UNKNOWN;
210 if (strcasecmp (fileext, exttype[i].extension) == 0)
212 f_form = exttype[i].form;
216 while (exttype[i].form != FORM_UNKNOWN);
222 /* Finalize commandline options. */
225 gfc_post_options (const char **pfilename)
227 const char *filename = *pfilename, *canon_source_file = NULL;
231 /* Issue an error if -fwhole-program was used. */
232 if (flag_whole_program)
233 gfc_fatal_error ("Option -fwhole-program is not supported for Fortran");
235 /* -fbounds-check is equivalent to -fcheck=bounds */
236 if (flag_bounds_check)
237 gfc_option.rtcheck |= GFC_RTCHECK_BOUNDS;
239 /* Verify the input file name. */
240 if (!filename || strcmp (filename, "-") == 0)
245 if (gfc_option.flag_preprocessed)
247 /* For preprocessed files, if the first tokens are of the form # NUM.
248 handle the directives so we know the original file name. */
249 gfc_source_file = gfc_read_orig_filename (filename, &canon_source_file);
250 if (gfc_source_file == NULL)
251 gfc_source_file = filename;
253 *pfilename = gfc_source_file;
256 gfc_source_file = filename;
258 if (canon_source_file == NULL)
259 canon_source_file = gfc_source_file;
261 /* Adds the path where the source file is to the list of include files. */
263 i = strlen (canon_source_file);
264 while (i > 0 && !IS_DIR_SEPARATOR (canon_source_file[i]))
269 source_path = (char *) alloca (i + 1);
270 memcpy (source_path, canon_source_file, i);
272 gfc_add_include_path (source_path, true, true);
275 gfc_add_include_path (".", true, true);
277 if (canon_source_file != gfc_source_file)
278 gfc_free (CONST_CAST (char *, canon_source_file));
280 /* Decide which form the file will be read in as. */
282 if (gfc_option.source_form != FORM_UNKNOWN)
283 gfc_current_form = gfc_option.source_form;
286 gfc_current_form = form_from_filename (filename);
288 if (gfc_current_form == FORM_UNKNOWN)
290 gfc_current_form = FORM_FREE;
291 gfc_warning_now ("Reading file '%s' as free form",
292 (filename[0] == '\0') ? "<stdin>" : filename);
296 /* If the user specified -fd-lines-as-{code|comments} verify that we're
298 if (gfc_current_form == FORM_FREE)
300 if (gfc_option.flag_d_lines == 0)
301 gfc_warning_now ("'-fd-lines-as-comments' has no effect "
303 else if (gfc_option.flag_d_lines == 1)
304 gfc_warning_now ("'-fd-lines-as-code' has no effect in free form");
307 /* If -pedantic, warn about the use of GNU extensions. */
308 if (pedantic && (gfc_option.allow_std & GFC_STD_GNU) != 0)
309 gfc_option.warn_std |= GFC_STD_GNU;
310 /* -std=legacy -pedantic is effectively -std=gnu. */
311 if (pedantic && (gfc_option.allow_std & GFC_STD_LEGACY) != 0)
312 gfc_option.warn_std |= GFC_STD_F95_OBS | GFC_STD_F95_DEL | GFC_STD_LEGACY;
314 /* If the user didn't explicitly specify -f(no)-second-underscore we
315 use it if we're trying to be compatible with f2c, and not
317 if (gfc_option.flag_second_underscore == -1)
318 gfc_option.flag_second_underscore = gfc_option.flag_f2c;
320 if (!gfc_option.flag_automatic && gfc_option.flag_max_stack_var_size != -2
321 && gfc_option.flag_max_stack_var_size != 0)
322 gfc_warning_now ("Flag -fno-automatic overwrites -fmax-stack-var-size=%d",
323 gfc_option.flag_max_stack_var_size);
324 else if (!gfc_option.flag_automatic && gfc_option.flag_recursive)
325 gfc_warning_now ("Flag -fno-automatic overwrites -frecursive");
326 else if (!gfc_option.flag_automatic && gfc_option.flag_openmp)
327 gfc_warning_now ("Flag -fno-automatic overwrites -frecursive implied by "
329 else if (gfc_option.flag_max_stack_var_size != -2
330 && gfc_option.flag_recursive)
331 gfc_warning_now ("Flag -frecursive overwrites -fmax-stack-var-size=%d",
332 gfc_option.flag_max_stack_var_size);
333 else if (gfc_option.flag_max_stack_var_size != -2
334 && gfc_option.flag_openmp)
335 gfc_warning_now ("Flag -fmax-stack-var-size=%d overwrites -frecursive "
336 "implied by -fopenmp",
337 gfc_option.flag_max_stack_var_size);
339 /* Implied -frecursive; implemented as -fmax-stack-var-size=-1. */
340 if (gfc_option.flag_max_stack_var_size == -2 && gfc_option.flag_openmp)
341 gfc_option.flag_max_stack_var_size = -1;
344 if (gfc_option.flag_max_stack_var_size == -2)
345 gfc_option.flag_max_stack_var_size = 32768;
347 /* Implement -frecursive as -fmax-stack-var-size=-1. */
348 if (gfc_option.flag_recursive)
349 gfc_option.flag_max_stack_var_size = -1;
351 /* Implement -fno-automatic as -fmax-stack-var-size=0. */
352 if (!gfc_option.flag_automatic)
353 gfc_option.flag_max_stack_var_size = 0;
357 gfc_option.warn_ampersand = 1;
358 gfc_option.warn_tabs = 0;
361 gfc_cpp_post_options ();
363 /* FIXME: return gfc_cpp_preprocess_only ();
365 The return value of this function indicates whether the
366 backend needs to be initialized. On -E, we don't need
367 the backend. However, if we return 'true' here, an
368 ICE occurs. Initializing the backend doesn't hurt much,
369 hence, for now we can live with it as is. */
374 /* Set the options for -Wall. */
377 set_Wall (int setting)
379 gfc_option.warn_aliasing = setting;
380 gfc_option.warn_ampersand = setting;
381 gfc_option.warn_line_truncation = setting;
382 gfc_option.warn_surprising = setting;
383 gfc_option.warn_tabs = !setting;
384 gfc_option.warn_underflow = setting;
385 gfc_option.warn_intrinsic_shadow = setting;
386 gfc_option.warn_intrinsics_std = setting;
387 gfc_option.warn_character_truncation = setting;
389 warn_unused = setting;
390 warn_return_type = setting;
391 warn_switch = setting;
393 /* We save the value of warn_uninitialized, since if they put
394 -Wuninitialized on the command line, we need to generate a
395 warning about not using it without also specifying -O. */
397 warn_uninitialized = 0;
398 else if (warn_uninitialized != 1)
399 warn_uninitialized = 2;
404 gfc_handle_module_path_options (const char *arg)
407 if (gfc_option.module_dir != NULL)
408 gfc_fatal_error ("gfortran: Only one -J option allowed");
410 gfc_option.module_dir = (char *) gfc_getmem (strlen (arg) + 2);
411 strcpy (gfc_option.module_dir, arg);
412 strcat (gfc_option.module_dir, "/");
414 gfc_add_include_path (gfc_option.module_dir, true, false);
419 gfc_handle_fpe_trap_option (const char *arg)
421 int result, pos = 0, n;
422 static const char * const exception[] = { "invalid", "denormal", "zero",
423 "overflow", "underflow",
425 static const int opt_exception[] = { GFC_FPE_INVALID, GFC_FPE_DENORMAL,
426 GFC_FPE_ZERO, GFC_FPE_OVERFLOW,
427 GFC_FPE_UNDERFLOW, GFC_FPE_PRECISION,
435 while (arg[pos] && arg[pos] != ',')
439 for (n = 0; exception[n] != NULL; n++)
441 if (exception[n] && strncmp (exception[n], arg, pos) == 0)
443 gfc_option.fpe |= opt_exception[n];
451 gfc_fatal_error ("Argument to -ffpe-trap is not valid: %s", arg);
457 gfc_handle_runtime_check_option (const char *arg)
459 int result, pos = 0, n;
460 static const char * const optname[] = { "all", "bounds", "array-temps",
461 /* "recursion", "do", */ NULL };
462 static const int optmask[] = { GFC_RTCHECK_ALL, GFC_RTCHECK_BOUNDS,
463 GFC_RTCHECK_ARRAY_TEMPS,
464 /* GFC_RTCHECK_RECURSION, GFC_RTCHECK_DO, */
472 while (arg[pos] && arg[pos] != ',')
476 for (n = 0; optname[n] != NULL; n++)
478 if (optname[n] && strncmp (optname[n], arg, pos) == 0)
480 gfc_option.rtcheck |= optmask[n];
488 gfc_fatal_error ("Argument to -fcheck is not valid: %s", arg);
493 /* Handle command-line options. Returns 0 if unrecognized, 1 if
494 recognized and handled. */
497 gfc_handle_option (size_t scode, const char *arg, int value)
500 enum opt_code code = (enum opt_code) scode;
502 /* Ignore file names. */
506 if (gfc_cpp_handle_option (scode, arg, value) == 1)
520 gfc_option.warn_aliasing = value;
524 gfc_option.warn_ampersand = value;
527 case OPT_Warray_temporaries:
528 gfc_option.warn_array_temp = value;
531 case OPT_Wcharacter_truncation:
532 gfc_option.warn_character_truncation = value;
535 case OPT_Wconversion:
536 gfc_option.warn_conversion = value;
539 case OPT_Wimplicit_interface:
540 gfc_option.warn_implicit_interface = value;
543 case OPT_Wline_truncation:
544 gfc_option.warn_line_truncation = value;
547 case OPT_Wreturn_type:
548 warn_return_type = value;
551 case OPT_Wsurprising:
552 gfc_option.warn_surprising = value;
556 gfc_option.warn_tabs = value;
560 gfc_option.warn_underflow = value;
563 case OPT_Wintrinsic_shadow:
564 gfc_option.warn_intrinsic_shadow = value;
567 case OPT_Walign_commons:
568 gfc_option.warn_align_commons = value;
571 case OPT_fall_intrinsics:
572 gfc_option.flag_all_intrinsics = 1;
576 gfc_option.flag_automatic = value;
579 case OPT_fallow_leading_underscore:
580 gfc_option.flag_allow_leading_underscore = value;
584 gfc_option.flag_backslash = value;
588 gfc_option.flag_backtrace = value;
591 case OPT_fcheck_array_temporaries:
592 gfc_option.rtcheck |= GFC_RTCHECK_ARRAY_TEMPS;
596 gfc_option.flag_dump_core = value;
599 case OPT_fcray_pointer:
600 gfc_option.flag_cray_pointer = value;
604 gfc_option.flag_f2c = value;
608 gfc_option.flag_dollar_ok = value;
611 case OPT_fexternal_blas:
612 gfc_option.flag_external_blas = value;
615 case OPT_fblas_matmul_limit_:
616 gfc_option.blas_matmul_limit = value;
619 case OPT_fd_lines_as_code:
620 gfc_option.flag_d_lines = 1;
623 case OPT_fd_lines_as_comments:
624 gfc_option.flag_d_lines = 0;
627 case OPT_fdump_parse_tree:
628 gfc_option.dump_parse_tree = value;
631 case OPT_ffixed_form:
632 gfc_option.source_form = FORM_FIXED;
635 case OPT_ffixed_line_length_none:
636 gfc_option.fixed_line_length = 0;
639 case OPT_ffixed_line_length_:
640 if (value != 0 && value < 7)
641 gfc_fatal_error ("Fixed line length must be at least seven.");
642 gfc_option.fixed_line_length = value;
646 gfc_option.source_form = FORM_FREE;
650 gfc_option.flag_openmp = value;
653 case OPT_ffree_line_length_none:
654 gfc_option.free_line_length = 0;
657 case OPT_ffree_line_length_:
658 if (value != 0 && value < 4)
659 gfc_fatal_error ("Free line length must be at least three.");
660 gfc_option.free_line_length = value;
663 case OPT_funderscoring:
664 gfc_option.flag_underscoring = value;
667 case OPT_fsecond_underscore:
668 gfc_option.flag_second_underscore = value;
671 case OPT_static_libgfortran:
672 #ifndef HAVE_LD_STATIC_DYNAMIC
673 gfc_fatal_error ("-static-libgfortran is not supported in this "
678 case OPT_fimplicit_none:
679 gfc_option.flag_implicit_none = value;
682 case OPT_fintrinsic_modules_path:
683 gfc_add_include_path (arg, false, false);
684 gfc_add_intrinsic_modules_path (arg);
687 case OPT_fmax_array_constructor_:
688 gfc_option.flag_max_array_constructor = value > 65535 ? value : 65535;
691 case OPT_fmax_errors_:
692 gfc_option.max_errors = value;
695 case OPT_fmax_stack_var_size_:
696 gfc_option.flag_max_stack_var_size = value;
699 case OPT_fmodule_private:
700 gfc_option.flag_module_private = value;
703 case OPT_frange_check:
704 gfc_option.flag_range_check = value;
707 case OPT_fpack_derived:
708 gfc_option.flag_pack_derived = value;
711 case OPT_frepack_arrays:
712 gfc_option.flag_repack_arrays = value;
715 case OPT_fpreprocessed:
716 gfc_option.flag_preprocessed = value;
719 case OPT_fmax_identifier_length_:
720 if (value > GFC_MAX_SYMBOL_LEN)
721 gfc_fatal_error ("Maximum supported identifier length is %d",
723 gfc_option.max_identifier_length = value;
726 case OPT_fdefault_integer_8:
727 gfc_option.flag_default_integer = value;
730 case OPT_fdefault_real_8:
731 gfc_option.flag_default_real = value;
734 case OPT_fdefault_double_8:
735 gfc_option.flag_default_double = value;
738 case OPT_finit_local_zero:
739 gfc_option.flag_init_integer = GFC_INIT_INTEGER_ON;
740 gfc_option.flag_init_integer_value = 0;
741 gfc_option.flag_init_real = GFC_INIT_REAL_ZERO;
742 gfc_option.flag_init_logical = GFC_INIT_LOGICAL_FALSE;
743 gfc_option.flag_init_character = GFC_INIT_CHARACTER_ON;
744 gfc_option.flag_init_character_value = (char)0;
747 case OPT_finit_logical_:
748 if (!strcasecmp (arg, "false"))
749 gfc_option.flag_init_logical = GFC_INIT_LOGICAL_FALSE;
750 else if (!strcasecmp (arg, "true"))
751 gfc_option.flag_init_logical = GFC_INIT_LOGICAL_TRUE;
753 gfc_fatal_error ("Unrecognized option to -finit-logical: %s",
757 case OPT_finit_real_:
758 if (!strcasecmp (arg, "zero"))
759 gfc_option.flag_init_real = GFC_INIT_REAL_ZERO;
760 else if (!strcasecmp (arg, "nan"))
761 gfc_option.flag_init_real = GFC_INIT_REAL_NAN;
762 else if (!strcasecmp (arg, "snan"))
763 gfc_option.flag_init_real = GFC_INIT_REAL_SNAN;
764 else if (!strcasecmp (arg, "inf"))
765 gfc_option.flag_init_real = GFC_INIT_REAL_INF;
766 else if (!strcasecmp (arg, "-inf"))
767 gfc_option.flag_init_real = GFC_INIT_REAL_NEG_INF;
769 gfc_fatal_error ("Unrecognized option to -finit-real: %s",
773 case OPT_finit_integer_:
774 gfc_option.flag_init_integer = GFC_INIT_INTEGER_ON;
775 gfc_option.flag_init_integer_value = atoi (arg);
778 case OPT_finit_character_:
779 if (value >= 0 && value <= 127)
781 gfc_option.flag_init_character = GFC_INIT_CHARACTER_ON;
782 gfc_option.flag_init_character_value = (char)value;
785 gfc_fatal_error ("The value of n in -finit-character=n must be "
786 "between 0 and 127");
790 gfc_add_include_path (arg, true, false);
794 gfc_handle_module_path_options (arg);
798 gfc_option.flag_sign_zero = value;
802 gfc_handle_fpe_trap_option (arg);
806 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95 | GFC_STD_F77;
807 gfc_option.warn_std = GFC_STD_F95_OBS;
808 gfc_option.max_continue_fixed = 19;
809 gfc_option.max_continue_free = 39;
810 gfc_option.max_identifier_length = 31;
811 gfc_option.warn_ampersand = 1;
812 gfc_option.warn_tabs = 0;
816 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
817 | GFC_STD_F2003 | GFC_STD_F95;
818 gfc_option.warn_std = GFC_STD_F95_OBS;
819 gfc_option.max_identifier_length = 63;
820 gfc_option.warn_ampersand = 1;
821 gfc_option.warn_tabs = 0;
825 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
826 | GFC_STD_F2003 | GFC_STD_F95 | GFC_STD_F2008;
827 gfc_option.warn_std = GFC_STD_F95_OBS;
828 gfc_option.max_identifier_length = 63;
829 gfc_option.warn_ampersand = 1;
830 gfc_option.warn_tabs = 0;
834 set_default_std_flags ();
838 set_default_std_flags ();
839 gfc_option.warn_std = 0;
842 case OPT_Wintrinsics_std:
843 gfc_option.warn_intrinsics_std = value;
846 case OPT_fshort_enums:
847 gfc_option.fshort_enums = 1;
850 case OPT_fconvert_little_endian:
851 gfc_option.convert = GFC_CONVERT_LITTLE;
854 case OPT_fconvert_big_endian:
855 gfc_option.convert = GFC_CONVERT_BIG;
858 case OPT_fconvert_native:
859 gfc_option.convert = GFC_CONVERT_NATIVE;
862 case OPT_fconvert_swap:
863 gfc_option.convert = GFC_CONVERT_SWAP;
866 case OPT_frecord_marker_4:
867 gfc_option.record_marker = 4;
870 case OPT_frecord_marker_8:
871 gfc_option.record_marker = 8;
874 case OPT_fmax_subrecord_length_:
875 if (value > MAX_SUBRECORD_LENGTH)
876 gfc_fatal_error ("Maximum subrecord length cannot exceed %d",
877 MAX_SUBRECORD_LENGTH);
879 gfc_option.max_subrecord_length = value;
883 gfc_option.flag_recursive = 1;
886 case OPT_falign_commons:
887 gfc_option.flag_align_commons = value;
891 gfc_handle_runtime_check_option (arg);