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_check_array_temporaries = 0;
105 gfc_option.flag_allow_leading_underscore = 0;
106 gfc_option.flag_dump_core = 0;
107 gfc_option.flag_external_blas = 0;
108 gfc_option.blas_matmul_limit = 30;
109 gfc_option.flag_cray_pointer = 0;
110 gfc_option.flag_d_lines = -1;
111 gfc_option.flag_openmp = 0;
112 gfc_option.flag_sign_zero = 1;
113 gfc_option.flag_recursive = 0;
114 gfc_option.flag_init_integer = GFC_INIT_INTEGER_OFF;
115 gfc_option.flag_init_integer_value = 0;
116 gfc_option.flag_init_real = GFC_INIT_REAL_OFF;
117 gfc_option.flag_init_logical = GFC_INIT_LOGICAL_OFF;
118 gfc_option.flag_init_character = GFC_INIT_CHARACTER_OFF;
119 gfc_option.flag_init_character_value = (char)0;
123 /* Argument pointers cannot point to anything but their argument. */
124 flag_argument_noalias = 3;
128 set_default_std_flags ();
130 /* -fshort-enums can be default on some targets. */
131 gfc_option.fshort_enums = targetm.default_short_enums ();
133 /* Initialize cpp-related options. */
134 gfc_cpp_init_options(argc, argv);
140 /* Determine the source form from the filename extension. We assume
141 case insensitivity. */
143 static gfc_source_form
144 form_from_filename (const char *filename)
148 const char *extension;
149 gfc_source_form form;
176 }; /* sentinel value */
178 gfc_source_form f_form;
182 /* Find end of file name. Note, filename is either a NULL pointer or
183 a NUL terminated string. */
185 while (filename[i] != '\0')
188 /* Find last period. */
189 while (i >= 0 && (filename[i] != '.'))
192 /* Did we see a file extension? */
194 return FORM_UNKNOWN; /* Nope */
196 /* Get file extension and compare it to others. */
197 fileext = &(filename[i]);
200 f_form = FORM_UNKNOWN;
204 if (strcasecmp (fileext, exttype[i].extension) == 0)
206 f_form = exttype[i].form;
210 while (exttype[i].form != FORM_UNKNOWN);
216 /* Finalize commandline options. */
219 gfc_post_options (const char **pfilename)
221 const char *filename = *pfilename, *canon_source_file = NULL;
225 /* Issue an error if -fwhole-program was used. */
226 if (flag_whole_program)
227 gfc_fatal_error ("Option -fwhole-program is not supported for Fortran");
229 /* Verify the input file name. */
230 if (!filename || strcmp (filename, "-") == 0)
235 if (gfc_option.flag_preprocessed)
237 /* For preprocessed files, if the first tokens are of the form # NUM.
238 handle the directives so we know the original file name. */
239 gfc_source_file = gfc_read_orig_filename (filename, &canon_source_file);
240 if (gfc_source_file == NULL)
241 gfc_source_file = filename;
243 *pfilename = gfc_source_file;
246 gfc_source_file = filename;
248 if (canon_source_file == NULL)
249 canon_source_file = gfc_source_file;
251 /* Adds the path where the source file is to the list of include files. */
253 i = strlen (canon_source_file);
254 while (i > 0 && !IS_DIR_SEPARATOR (canon_source_file[i]))
259 source_path = (char *) alloca (i + 1);
260 memcpy (source_path, canon_source_file, i);
262 gfc_add_include_path (source_path, true);
265 gfc_add_include_path (".", true);
267 if (canon_source_file != gfc_source_file)
268 gfc_free (CONST_CAST (char *, canon_source_file));
270 /* Decide which form the file will be read in as. */
272 if (gfc_option.source_form != FORM_UNKNOWN)
273 gfc_current_form = gfc_option.source_form;
276 gfc_current_form = form_from_filename (filename);
278 if (gfc_current_form == FORM_UNKNOWN)
280 gfc_current_form = FORM_FREE;
281 gfc_warning_now ("Reading file '%s' as free form",
282 (filename[0] == '\0') ? "<stdin>" : filename);
286 /* If the user specified -fd-lines-as-{code|comments} verify that we're
288 if (gfc_current_form == FORM_FREE)
290 if (gfc_option.flag_d_lines == 0)
291 gfc_warning_now ("'-fd-lines-as-comments' has no effect "
293 else if (gfc_option.flag_d_lines == 1)
294 gfc_warning_now ("'-fd-lines-as-code' has no effect in free form");
297 /* Use tree inlining. */
301 /* If -pedantic, warn about the use of GNU extensions. */
302 if (pedantic && (gfc_option.allow_std & GFC_STD_GNU) != 0)
303 gfc_option.warn_std |= GFC_STD_GNU;
304 /* -std=legacy -pedantic is effectively -std=gnu. */
305 if (pedantic && (gfc_option.allow_std & GFC_STD_LEGACY) != 0)
306 gfc_option.warn_std |= GFC_STD_F95_OBS | GFC_STD_F95_DEL | GFC_STD_LEGACY;
308 /* If the user didn't explicitly specify -f(no)-second-underscore we
309 use it if we're trying to be compatible with f2c, and not
311 if (gfc_option.flag_second_underscore == -1)
312 gfc_option.flag_second_underscore = gfc_option.flag_f2c;
314 if (!gfc_option.flag_automatic && gfc_option.flag_max_stack_var_size != -2
315 && gfc_option.flag_max_stack_var_size != 0)
316 gfc_warning_now ("Flag -fno-automatic overwrites -fmax-stack-var-size=%d",
317 gfc_option.flag_max_stack_var_size);
318 else if (!gfc_option.flag_automatic && gfc_option.flag_recursive)
319 gfc_warning_now ("Flag -fno-automatic overwrites -frecursive");
320 else if (!gfc_option.flag_automatic && gfc_option.flag_openmp)
321 gfc_warning_now ("Flag -fno-automatic overwrites -frecursive implied by "
323 else if (gfc_option.flag_max_stack_var_size != -2
324 && gfc_option.flag_recursive)
325 gfc_warning_now ("Flag -frecursive overwrites -fmax-stack-var-size=%d",
326 gfc_option.flag_max_stack_var_size);
327 else if (gfc_option.flag_max_stack_var_size != -2
328 && gfc_option.flag_openmp)
329 gfc_warning_now ("Flag -fmax-stack-var-size=%d overwrites -frecursive "
330 "implied by -fopenmp",
331 gfc_option.flag_max_stack_var_size);
333 /* Implied -frecursive; implemented as -fmax-stack-var-size=-1. */
334 if (gfc_option.flag_max_stack_var_size == -2 && gfc_option.flag_openmp)
335 gfc_option.flag_max_stack_var_size = -1;
338 if (gfc_option.flag_max_stack_var_size == -2)
339 gfc_option.flag_max_stack_var_size = 32768;
341 /* Implement -frecursive as -fmax-stack-var-size=-1. */
342 if (gfc_option.flag_recursive)
343 gfc_option.flag_max_stack_var_size = -1;
345 /* Implement -fno-automatic as -fmax-stack-var-size=0. */
346 if (!gfc_option.flag_automatic)
347 gfc_option.flag_max_stack_var_size = 0;
351 gfc_option.warn_ampersand = 1;
352 gfc_option.warn_tabs = 0;
355 gfc_cpp_post_options ();
357 /* FIXME: return gfc_cpp_preprocess_only ();
359 The return value of this function indicates whether the
360 backend needs to be initialized. On -E, we don't need
361 the backend. However, if we return 'true' here, an
362 ICE occurs. Initializing the backend doesn't hurt much,
363 hence, for now we can live with it as is. */
368 /* Set the options for -Wall. */
371 set_Wall (int setting)
373 gfc_option.warn_aliasing = setting;
374 gfc_option.warn_ampersand = setting;
375 gfc_option.warn_line_truncation = setting;
376 gfc_option.warn_surprising = setting;
377 gfc_option.warn_tabs = !setting;
378 gfc_option.warn_underflow = setting;
379 gfc_option.warn_intrinsic_shadow = setting;
380 gfc_option.warn_intrinsics_std = setting;
381 gfc_option.warn_character_truncation = setting;
383 set_Wunused (setting);
384 warn_return_type = setting;
385 warn_switch = setting;
387 /* We save the value of warn_uninitialized, since if they put
388 -Wuninitialized on the command line, we need to generate a
389 warning about not using it without also specifying -O. */
391 warn_uninitialized = 0;
392 else if (warn_uninitialized != 1)
393 warn_uninitialized = 2;
398 gfc_handle_module_path_options (const char *arg)
401 if (gfc_option.module_dir != NULL)
402 gfc_fatal_error ("gfortran: Only one -J option allowed");
404 gfc_option.module_dir = (char *) gfc_getmem (strlen (arg) + 2);
405 strcpy (gfc_option.module_dir, arg);
406 strcat (gfc_option.module_dir, "/");
408 gfc_add_include_path (gfc_option.module_dir, true);
413 gfc_handle_fpe_trap_option (const char *arg)
415 int result, pos = 0, n;
416 static const char * const exception[] = { "invalid", "denormal", "zero",
417 "overflow", "underflow",
419 static const int opt_exception[] = { GFC_FPE_INVALID, GFC_FPE_DENORMAL,
420 GFC_FPE_ZERO, GFC_FPE_OVERFLOW,
421 GFC_FPE_UNDERFLOW, GFC_FPE_PRECISION,
429 while (arg[pos] && arg[pos] != ',')
433 for (n = 0; exception[n] != NULL; n++)
435 if (exception[n] && strncmp (exception[n], arg, pos) == 0)
437 gfc_option.fpe |= opt_exception[n];
445 gfc_fatal_error ("Argument to -ffpe-trap is not valid: %s", arg);
450 /* Handle command-line options. Returns 0 if unrecognized, 1 if
451 recognized and handled. */
454 gfc_handle_option (size_t scode, const char *arg, int value)
457 enum opt_code code = (enum opt_code) scode;
459 /* Ignore file names. */
463 if (gfc_cpp_handle_option (scode, arg, value) == 1)
477 gfc_option.warn_aliasing = value;
481 gfc_option.warn_ampersand = value;
484 case OPT_Warray_temporaries:
485 gfc_option.warn_array_temp = value;
488 case OPT_Wcharacter_truncation:
489 gfc_option.warn_character_truncation = value;
492 case OPT_Wconversion:
493 gfc_option.warn_conversion = value;
496 case OPT_Wimplicit_interface:
497 gfc_option.warn_implicit_interface = value;
500 case OPT_Wline_truncation:
501 gfc_option.warn_line_truncation = value;
504 case OPT_Wreturn_type:
505 warn_return_type = value;
508 case OPT_Wsurprising:
509 gfc_option.warn_surprising = value;
513 gfc_option.warn_tabs = value;
517 gfc_option.warn_underflow = value;
520 case OPT_Wintrinsic_shadow:
521 gfc_option.warn_intrinsic_shadow = value;
524 case OPT_fall_intrinsics:
525 gfc_option.flag_all_intrinsics = 1;
529 gfc_option.flag_automatic = value;
532 case OPT_fallow_leading_underscore:
533 gfc_option.flag_allow_leading_underscore = value;
537 gfc_option.flag_backslash = value;
541 gfc_option.flag_backtrace = value;
544 case OPT_fcheck_array_temporaries:
545 gfc_option.flag_check_array_temporaries = value;
549 gfc_option.flag_dump_core = value;
552 case OPT_fcray_pointer:
553 gfc_option.flag_cray_pointer = value;
557 gfc_option.flag_f2c = value;
561 gfc_option.flag_dollar_ok = value;
564 case OPT_fexternal_blas:
565 gfc_option.flag_external_blas = value;
568 case OPT_fblas_matmul_limit_:
569 gfc_option.blas_matmul_limit = value;
572 case OPT_fd_lines_as_code:
573 gfc_option.flag_d_lines = 1;
576 case OPT_fd_lines_as_comments:
577 gfc_option.flag_d_lines = 0;
580 case OPT_fdump_parse_tree:
581 gfc_option.dump_parse_tree = value;
584 case OPT_ffixed_form:
585 gfc_option.source_form = FORM_FIXED;
588 case OPT_ffixed_line_length_none:
589 gfc_option.fixed_line_length = 0;
592 case OPT_ffixed_line_length_:
593 if (value != 0 && value < 7)
594 gfc_fatal_error ("Fixed line length must be at least seven.");
595 gfc_option.fixed_line_length = value;
599 gfc_option.source_form = FORM_FREE;
603 gfc_option.flag_openmp = value;
606 case OPT_ffree_line_length_none:
607 gfc_option.free_line_length = 0;
610 case OPT_ffree_line_length_:
611 if (value != 0 && value < 4)
612 gfc_fatal_error ("Free line length must be at least three.");
613 gfc_option.free_line_length = value;
616 case OPT_funderscoring:
617 gfc_option.flag_underscoring = value;
620 case OPT_fsecond_underscore:
621 gfc_option.flag_second_underscore = value;
624 case OPT_static_libgfortran:
625 #ifndef HAVE_LD_STATIC_DYNAMIC
626 gfc_fatal_error ("-static-libgfortran is not supported in this "
631 case OPT_fimplicit_none:
632 gfc_option.flag_implicit_none = value;
635 case OPT_fintrinsic_modules_path:
636 gfc_add_include_path (arg, false);
637 gfc_add_intrinsic_modules_path (arg);
640 case OPT_fmax_errors_:
641 gfc_option.max_errors = value;
644 case OPT_fmax_stack_var_size_:
645 gfc_option.flag_max_stack_var_size = value;
648 case OPT_fmodule_private:
649 gfc_option.flag_module_private = value;
652 case OPT_frange_check:
653 gfc_option.flag_range_check = value;
656 case OPT_fpack_derived:
657 gfc_option.flag_pack_derived = value;
660 case OPT_frepack_arrays:
661 gfc_option.flag_repack_arrays = value;
664 case OPT_fpreprocessed:
665 gfc_option.flag_preprocessed = value;
668 case OPT_fmax_identifier_length_:
669 if (value > GFC_MAX_SYMBOL_LEN)
670 gfc_fatal_error ("Maximum supported identifier length is %d",
672 gfc_option.max_identifier_length = value;
675 case OPT_fdefault_integer_8:
676 gfc_option.flag_default_integer = value;
679 case OPT_fdefault_real_8:
680 gfc_option.flag_default_real = value;
683 case OPT_fdefault_double_8:
684 gfc_option.flag_default_double = value;
687 case OPT_finit_local_zero:
688 gfc_option.flag_init_integer = GFC_INIT_INTEGER_ON;
689 gfc_option.flag_init_integer_value = 0;
690 gfc_option.flag_init_real = GFC_INIT_REAL_ZERO;
691 gfc_option.flag_init_logical = GFC_INIT_LOGICAL_FALSE;
692 gfc_option.flag_init_character = GFC_INIT_CHARACTER_ON;
693 gfc_option.flag_init_character_value = (char)0;
696 case OPT_finit_logical_:
697 if (!strcasecmp (arg, "false"))
698 gfc_option.flag_init_logical = GFC_INIT_LOGICAL_FALSE;
699 else if (!strcasecmp (arg, "true"))
700 gfc_option.flag_init_logical = GFC_INIT_LOGICAL_TRUE;
702 gfc_fatal_error ("Unrecognized option to -finit-logical: %s",
706 case OPT_finit_real_:
707 if (!strcasecmp (arg, "zero"))
708 gfc_option.flag_init_real = GFC_INIT_REAL_ZERO;
709 else if (!strcasecmp (arg, "nan"))
710 gfc_option.flag_init_real = GFC_INIT_REAL_NAN;
711 else if (!strcasecmp (arg, "inf"))
712 gfc_option.flag_init_real = GFC_INIT_REAL_INF;
713 else if (!strcasecmp (arg, "-inf"))
714 gfc_option.flag_init_real = GFC_INIT_REAL_NEG_INF;
716 gfc_fatal_error ("Unrecognized option to -finit-real: %s",
720 case OPT_finit_integer_:
721 gfc_option.flag_init_integer = GFC_INIT_INTEGER_ON;
722 gfc_option.flag_init_integer_value = atoi (arg);
725 case OPT_finit_character_:
726 if (value >= 0 && value <= 127)
728 gfc_option.flag_init_character = GFC_INIT_CHARACTER_ON;
729 gfc_option.flag_init_character_value = (char)value;
732 gfc_fatal_error ("The value of n in -finit-character=n must be "
733 "between 0 and 127");
737 gfc_add_include_path (arg, true);
741 gfc_handle_module_path_options (arg);
745 gfc_option.flag_sign_zero = value;
749 gfc_handle_fpe_trap_option (arg);
753 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95 | GFC_STD_F77;
754 gfc_option.warn_std = GFC_STD_F95_OBS;
755 gfc_option.max_continue_fixed = 19;
756 gfc_option.max_continue_free = 39;
757 gfc_option.max_identifier_length = 31;
758 gfc_option.warn_ampersand = 1;
759 gfc_option.warn_tabs = 0;
763 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
764 | GFC_STD_F2003 | GFC_STD_F95;
765 gfc_option.warn_std = GFC_STD_F95_OBS;
766 gfc_option.max_identifier_length = 63;
767 gfc_option.warn_ampersand = 1;
768 gfc_option.warn_tabs = 0;
772 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
773 | GFC_STD_F2003 | GFC_STD_F95 | GFC_STD_F2008;
774 gfc_option.warn_std = GFC_STD_F95_OBS;
775 gfc_option.max_identifier_length = 63;
776 gfc_option.warn_ampersand = 1;
777 gfc_option.warn_tabs = 0;
781 set_default_std_flags ();
785 set_default_std_flags ();
786 gfc_option.warn_std = 0;
789 case OPT_Wintrinsics_std:
790 gfc_option.warn_intrinsics_std = value;
793 case OPT_fshort_enums:
794 gfc_option.fshort_enums = 1;
797 case OPT_fconvert_little_endian:
798 gfc_option.convert = GFC_CONVERT_LITTLE;
801 case OPT_fconvert_big_endian:
802 gfc_option.convert = GFC_CONVERT_BIG;
805 case OPT_fconvert_native:
806 gfc_option.convert = GFC_CONVERT_NATIVE;
809 case OPT_fconvert_swap:
810 gfc_option.convert = GFC_CONVERT_SWAP;
813 case OPT_frecord_marker_4:
814 gfc_option.record_marker = 4;
817 case OPT_frecord_marker_8:
818 gfc_option.record_marker = 8;
821 case OPT_fmax_subrecord_length_:
822 if (value > MAX_SUBRECORD_LENGTH)
823 gfc_fatal_error ("Maximum subrecord length cannot exceed %d",
824 MAX_SUBRECORD_LENGTH);
826 gfc_option.max_subrecord_length = value;
830 gfc_option.flag_recursive = 1;