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"
35 gfc_option_t gfc_option;
38 /* Set flags that control warnings and errors for different
39 Fortran standards to their default values. */
42 set_default_std_flags (void)
44 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
45 | GFC_STD_F2003 | GFC_STD_F2008 | GFC_STD_F95 | GFC_STD_F77
46 | GFC_STD_GNU | GFC_STD_LEGACY;
47 gfc_option.warn_std = GFC_STD_F95_DEL | GFC_STD_LEGACY;
50 /* Get ready for options handling. */
53 gfc_init_options (unsigned int argc ATTRIBUTE_UNUSED,
54 const char **argv ATTRIBUTE_UNUSED)
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 = 19;
62 gfc_option.max_continue_free = 39;
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_conversion = 0;
73 gfc_option.warn_implicit_interface = 0;
74 gfc_option.warn_line_truncation = 0;
75 gfc_option.warn_surprising = 0;
76 gfc_option.warn_tabs = 1;
77 gfc_option.warn_underflow = 1;
78 gfc_option.max_errors = 25;
80 gfc_option.flag_all_intrinsics = 0;
81 gfc_option.flag_default_double = 0;
82 gfc_option.flag_default_integer = 0;
83 gfc_option.flag_default_real = 0;
84 gfc_option.flag_dollar_ok = 0;
85 gfc_option.flag_underscoring = 1;
86 gfc_option.flag_f2c = 0;
87 gfc_option.flag_second_underscore = -1;
88 gfc_option.flag_implicit_none = 0;
90 /* Default value of flag_max_stack_var_size is set in gfc_post_options. */
91 gfc_option.flag_max_stack_var_size = -2;
93 gfc_option.flag_range_check = 1;
94 gfc_option.flag_pack_derived = 0;
95 gfc_option.flag_repack_arrays = 0;
96 gfc_option.flag_preprocessed = 0;
97 gfc_option.flag_automatic = 1;
98 gfc_option.flag_backslash = 0;
99 gfc_option.flag_module_private = 0;
100 gfc_option.flag_backtrace = 0;
101 gfc_option.flag_allow_leading_underscore = 0;
102 gfc_option.flag_dump_core = 0;
103 gfc_option.flag_external_blas = 0;
104 gfc_option.blas_matmul_limit = 30;
105 gfc_option.flag_cray_pointer = 0;
106 gfc_option.flag_d_lines = -1;
107 gfc_option.flag_openmp = 0;
108 gfc_option.flag_sign_zero = 1;
109 gfc_option.flag_recursive = 0;
110 gfc_option.flag_init_integer = GFC_INIT_INTEGER_OFF;
111 gfc_option.flag_init_integer_value = 0;
112 gfc_option.flag_init_real = GFC_INIT_REAL_OFF;
113 gfc_option.flag_init_logical = GFC_INIT_LOGICAL_OFF;
114 gfc_option.flag_init_character = GFC_INIT_CHARACTER_OFF;
115 gfc_option.flag_init_character_value = (char)0;
119 /* Argument pointers cannot point to anything but their argument. */
120 flag_argument_noalias = 3;
124 set_default_std_flags ();
126 gfc_option.warn_nonstd_intrinsics = 0;
128 /* -fshort-enums can be default on some targets. */
129 gfc_option.fshort_enums = targetm.default_short_enums ();
135 /* Determine the source form from the filename extension. We assume
136 case insensitivity. */
138 static gfc_source_form
139 form_from_filename (const char *filename)
143 const char *extension;
144 gfc_source_form form;
171 }; /* sentinel value */
173 gfc_source_form f_form;
177 /* Find end of file name. Note, filename is either a NULL pointer or
178 a NUL terminated string. */
180 while (filename[i] != '\0')
183 /* Find last period. */
184 while (i >= 0 && (filename[i] != '.'))
187 /* Did we see a file extension? */
189 return FORM_UNKNOWN; /* Nope */
191 /* Get file extension and compare it to others. */
192 fileext = &(filename[i]);
195 f_form = FORM_UNKNOWN;
199 if (strcasecmp (fileext, exttype[i].extension) == 0)
201 f_form = exttype[i].form;
205 while (exttype[i].form != FORM_UNKNOWN);
211 /* Finalize commandline options. */
214 gfc_post_options (const char **pfilename)
216 const char *filename = *pfilename, *canon_source_file = NULL;
220 /* Issue an error if -fwhole-program was used. */
221 if (flag_whole_program)
222 gfc_fatal_error ("Option -fwhole-program is not supported for Fortran");
224 /* Verify the input file name. */
225 if (!filename || strcmp (filename, "-") == 0)
230 if (gfc_option.flag_preprocessed)
232 /* For preprocessed files, if the first tokens are of the form # NUM.
233 handle the directives so we know the original file name. */
234 gfc_source_file = gfc_read_orig_filename (filename, &canon_source_file);
235 if (gfc_source_file == NULL)
236 gfc_source_file = filename;
238 *pfilename = gfc_source_file;
241 gfc_source_file = filename;
243 if (canon_source_file == NULL)
244 canon_source_file = gfc_source_file;
246 /* Adds the path where the source file is to the list of include files. */
248 i = strlen (canon_source_file);
249 while (i > 0 && !IS_DIR_SEPARATOR (canon_source_file[i]))
254 source_path = alloca (i + 1);
255 memcpy (source_path, canon_source_file, i);
257 gfc_add_include_path (source_path, true);
260 gfc_add_include_path (".", true);
262 if (canon_source_file != gfc_source_file)
263 gfc_free (CONST_CAST (char *, canon_source_file));
265 /* Decide which form the file will be read in as. */
267 if (gfc_option.source_form != FORM_UNKNOWN)
268 gfc_current_form = gfc_option.source_form;
271 gfc_current_form = form_from_filename (filename);
273 if (gfc_current_form == FORM_UNKNOWN)
275 gfc_current_form = FORM_FREE;
276 gfc_warning_now ("Reading file '%s' as free form",
277 (filename[0] == '\0') ? "<stdin>" : filename);
281 /* If the user specified -fd-lines-as-{code|comments} verify that we're
283 if (gfc_current_form == FORM_FREE)
285 if (gfc_option.flag_d_lines == 0)
286 gfc_warning_now ("'-fd-lines-as-comments' has no effect "
288 else if (gfc_option.flag_d_lines == 1)
289 gfc_warning_now ("'-fd-lines-as-code' has no effect in free form");
292 flag_inline_trees = 1;
294 /* Use tree inlining. */
297 if (flag_inline_functions)
298 flag_inline_trees = 2;
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 if (gfc_option.flag_all_intrinsics)
355 gfc_option.warn_nonstd_intrinsics = 0;
361 /* Set the options for -Wall. */
364 set_Wall (int setting)
366 gfc_option.warn_aliasing = setting;
367 gfc_option.warn_ampersand = setting;
368 gfc_option.warn_line_truncation = setting;
369 gfc_option.warn_nonstd_intrinsics = setting;
370 gfc_option.warn_surprising = setting;
371 gfc_option.warn_tabs = !setting;
372 gfc_option.warn_underflow = setting;
373 gfc_option.warn_character_truncation = setting;
375 set_Wunused (setting);
376 warn_return_type = setting;
377 warn_switch = setting;
379 /* We save the value of warn_uninitialized, since if they put
380 -Wuninitialized on the command line, we need to generate a
381 warning about not using it without also specifying -O. */
383 warn_uninitialized = 0;
384 else if (warn_uninitialized != 1)
385 warn_uninitialized = 2;
390 gfc_handle_module_path_options (const char *arg)
393 if (gfc_option.module_dir != NULL)
394 gfc_fatal_error ("gfortran: Only one -M option allowed");
397 gfc_fatal_error ("gfortran: Directory required after -M");
399 gfc_option.module_dir = (char *) gfc_getmem (strlen (arg) + 2);
400 strcpy (gfc_option.module_dir, arg);
401 strcat (gfc_option.module_dir, "/");
403 gfc_add_include_path (gfc_option.module_dir, true);
408 gfc_handle_fpe_trap_option (const char *arg)
410 int result, pos = 0, n;
411 static const char * const exception[] = { "invalid", "denormal", "zero",
412 "overflow", "underflow",
414 static const int opt_exception[] = { GFC_FPE_INVALID, GFC_FPE_DENORMAL,
415 GFC_FPE_ZERO, GFC_FPE_OVERFLOW,
416 GFC_FPE_UNDERFLOW, GFC_FPE_PRECISION,
424 while (arg[pos] && arg[pos] != ',')
428 for (n = 0; exception[n] != NULL; n++)
430 if (exception[n] && strncmp (exception[n], arg, pos) == 0)
432 gfc_option.fpe |= opt_exception[n];
440 gfc_fatal_error ("Argument to -ffpe-trap is not valid: %s", arg);
445 /* Handle command-line options. Returns 0 if unrecognized, 1 if
446 recognized and handled. */
449 gfc_handle_option (size_t scode, const char *arg, int value)
452 enum opt_code code = (enum opt_code) scode;
454 /* Ignore file names. */
469 gfc_option.warn_aliasing = value;
473 gfc_option.warn_ampersand = value;
476 case OPT_Wcharacter_truncation:
477 gfc_option.warn_character_truncation = value;
480 case OPT_Wconversion:
481 gfc_option.warn_conversion = value;
484 case OPT_Wimplicit_interface:
485 gfc_option.warn_implicit_interface = value;
488 case OPT_Wline_truncation:
489 gfc_option.warn_line_truncation = value;
492 case OPT_Wreturn_type:
493 warn_return_type = value;
496 case OPT_Wsurprising:
497 gfc_option.warn_surprising = value;
501 gfc_option.warn_tabs = value;
505 gfc_option.warn_underflow = value;
508 case OPT_fall_intrinsics:
509 gfc_option.flag_all_intrinsics = 1;
513 gfc_option.flag_automatic = value;
516 case OPT_fallow_leading_underscore:
517 gfc_option.flag_allow_leading_underscore = value;
521 gfc_option.flag_backslash = value;
525 gfc_option.flag_backtrace = value;
529 gfc_option.flag_dump_core = value;
532 case OPT_fcray_pointer:
533 gfc_option.flag_cray_pointer = value;
537 gfc_option.flag_f2c = value;
541 gfc_option.flag_dollar_ok = value;
544 case OPT_fexternal_blas:
545 gfc_option.flag_external_blas = value;
548 case OPT_fblas_matmul_limit_:
549 gfc_option.blas_matmul_limit = value;
552 case OPT_fd_lines_as_code:
553 gfc_option.flag_d_lines = 1;
556 case OPT_fd_lines_as_comments:
557 gfc_option.flag_d_lines = 0;
560 case OPT_fdump_parse_tree:
561 gfc_option.dump_parse_tree = value;
564 case OPT_ffixed_form:
565 gfc_option.source_form = FORM_FIXED;
568 case OPT_ffixed_line_length_none:
569 gfc_option.fixed_line_length = 0;
572 case OPT_ffixed_line_length_:
573 if (value != 0 && value < 7)
574 gfc_fatal_error ("Fixed line length must be at least seven.");
575 gfc_option.fixed_line_length = value;
579 gfc_option.source_form = FORM_FREE;
583 gfc_option.flag_openmp = value;
586 case OPT_ffree_line_length_none:
587 gfc_option.free_line_length = 0;
590 case OPT_ffree_line_length_:
591 if (value != 0 && value < 4)
592 gfc_fatal_error ("Free line length must be at least three.");
593 gfc_option.free_line_length = value;
596 case OPT_funderscoring:
597 gfc_option.flag_underscoring = value;
600 case OPT_fsecond_underscore:
601 gfc_option.flag_second_underscore = value;
604 case OPT_static_libgfortran:
605 #ifndef HAVE_LD_STATIC_DYNAMIC
606 gfc_fatal_error ("-static-libgfortran is not supported in this "
611 case OPT_fimplicit_none:
612 gfc_option.flag_implicit_none = value;
615 case OPT_fintrinsic_modules_path:
616 gfc_add_include_path (arg, false);
617 gfc_add_intrinsic_modules_path (arg);
620 case OPT_fmax_errors_:
621 gfc_option.max_errors = value;
624 case OPT_fmax_stack_var_size_:
625 gfc_option.flag_max_stack_var_size = value;
628 case OPT_fmodule_private:
629 gfc_option.flag_module_private = value;
632 case OPT_frange_check:
633 gfc_option.flag_range_check = value;
636 case OPT_fpack_derived:
637 gfc_option.flag_pack_derived = value;
640 case OPT_frepack_arrays:
641 gfc_option.flag_repack_arrays = value;
644 case OPT_fpreprocessed:
645 gfc_option.flag_preprocessed = value;
648 case OPT_fmax_identifier_length_:
649 if (value > GFC_MAX_SYMBOL_LEN)
650 gfc_fatal_error ("Maximum supported identifier length is %d",
652 gfc_option.max_identifier_length = value;
655 case OPT_fdefault_integer_8:
656 gfc_option.flag_default_integer = value;
659 case OPT_fdefault_real_8:
660 gfc_option.flag_default_real = value;
663 case OPT_fdefault_double_8:
664 gfc_option.flag_default_double = value;
667 case OPT_finit_local_zero:
668 gfc_option.flag_init_integer = GFC_INIT_INTEGER_ON;
669 gfc_option.flag_init_integer_value = 0;
670 gfc_option.flag_init_real = GFC_INIT_REAL_ZERO;
671 gfc_option.flag_init_logical = GFC_INIT_LOGICAL_FALSE;
672 gfc_option.flag_init_character = GFC_INIT_CHARACTER_ON;
673 gfc_option.flag_init_character_value = (char)0;
676 case OPT_finit_logical_:
677 if (!strcasecmp (arg, "false"))
678 gfc_option.flag_init_logical = GFC_INIT_LOGICAL_FALSE;
679 else if (!strcasecmp (arg, "true"))
680 gfc_option.flag_init_logical = GFC_INIT_LOGICAL_TRUE;
682 gfc_fatal_error ("Unrecognized option to -finit-logical: %s",
686 case OPT_finit_real_:
687 if (!strcasecmp (arg, "zero"))
688 gfc_option.flag_init_real = GFC_INIT_REAL_ZERO;
689 else if (!strcasecmp (arg, "nan"))
690 gfc_option.flag_init_real = GFC_INIT_REAL_NAN;
691 else if (!strcasecmp (arg, "inf"))
692 gfc_option.flag_init_real = GFC_INIT_REAL_INF;
693 else if (!strcasecmp (arg, "-inf"))
694 gfc_option.flag_init_real = GFC_INIT_REAL_NEG_INF;
696 gfc_fatal_error ("Unrecognized option to -finit-real: %s",
700 case OPT_finit_integer_:
701 gfc_option.flag_init_integer = GFC_INIT_INTEGER_ON;
702 gfc_option.flag_init_integer_value = atoi (arg);
705 case OPT_finit_character_:
706 if (value >= 0 && value <= 127)
708 gfc_option.flag_init_character = GFC_INIT_CHARACTER_ON;
709 gfc_option.flag_init_character_value = (char)value;
712 gfc_fatal_error ("The value of n in -finit-character=n must be "
713 "between 0 and 127");
717 gfc_add_include_path (arg, true);
722 gfc_handle_module_path_options (arg);
726 gfc_option.flag_sign_zero = value;
730 gfc_handle_fpe_trap_option (arg);
734 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95 | GFC_STD_F77;
735 gfc_option.warn_std = GFC_STD_F95_OBS;
736 gfc_option.max_identifier_length = 31;
737 gfc_option.warn_ampersand = 1;
738 gfc_option.warn_tabs = 0;
742 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
743 | GFC_STD_F2003 | GFC_STD_F95;
744 gfc_option.warn_std = GFC_STD_F95_OBS;
745 gfc_option.max_continue_fixed = 255;
746 gfc_option.max_continue_free = 255;
747 gfc_option.max_identifier_length = 63;
748 gfc_option.warn_ampersand = 1;
749 gfc_option.warn_tabs = 0;
753 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
754 | GFC_STD_F2003 | GFC_STD_F95 | GFC_STD_F2008;
755 gfc_option.warn_std = GFC_STD_F95_OBS;
756 gfc_option.max_continue_fixed = 255;
757 gfc_option.max_continue_free = 255;
758 gfc_option.max_identifier_length = 63;
759 gfc_option.warn_ampersand = 1;
760 gfc_option.warn_tabs = 0;
764 set_default_std_flags ();
768 set_default_std_flags ();
769 gfc_option.warn_std = 0;
772 case OPT_Wnonstd_intrinsics:
773 gfc_option.warn_nonstd_intrinsics = value;
776 case OPT_fshort_enums:
777 gfc_option.fshort_enums = 1;
780 case OPT_fconvert_little_endian:
781 gfc_option.convert = GFC_CONVERT_LITTLE;
784 case OPT_fconvert_big_endian:
785 gfc_option.convert = GFC_CONVERT_BIG;
788 case OPT_fconvert_native:
789 gfc_option.convert = GFC_CONVERT_NATIVE;
792 case OPT_fconvert_swap:
793 gfc_option.convert = GFC_CONVERT_SWAP;
796 case OPT_frecord_marker_4:
797 gfc_option.record_marker = 4;
800 case OPT_frecord_marker_8:
801 gfc_option.record_marker = 8;
804 case OPT_fmax_subrecord_length_:
805 if (value > MAX_SUBRECORD_LENGTH)
806 gfc_fatal_error ("Maximum subrecord length cannot exceed %d",
807 MAX_SUBRECORD_LENGTH);
809 gfc_option.max_subrecord_length = value;
813 gfc_option.flag_recursive = 1;