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 /* If -pedantic, warn about the use of GNU extensions. */
298 if (pedantic && (gfc_option.allow_std & GFC_STD_GNU) != 0)
299 gfc_option.warn_std |= GFC_STD_GNU;
300 /* -std=legacy -pedantic is effectively -std=gnu. */
301 if (pedantic && (gfc_option.allow_std & GFC_STD_LEGACY) != 0)
302 gfc_option.warn_std |= GFC_STD_F95_OBS | GFC_STD_F95_DEL | GFC_STD_LEGACY;
304 /* If the user didn't explicitly specify -f(no)-second-underscore we
305 use it if we're trying to be compatible with f2c, and not
307 if (gfc_option.flag_second_underscore == -1)
308 gfc_option.flag_second_underscore = gfc_option.flag_f2c;
310 if (!gfc_option.flag_automatic && gfc_option.flag_max_stack_var_size != -2
311 && gfc_option.flag_max_stack_var_size != 0)
312 gfc_warning_now ("Flag -fno-automatic overwrites -fmax-stack-var-size=%d",
313 gfc_option.flag_max_stack_var_size);
314 else if (!gfc_option.flag_automatic && gfc_option.flag_recursive)
315 gfc_warning_now ("Flag -fno-automatic overwrites -frecursive");
316 else if (!gfc_option.flag_automatic && gfc_option.flag_openmp)
317 gfc_warning_now ("Flag -fno-automatic overwrites -frecursive implied by "
319 else if (gfc_option.flag_max_stack_var_size != -2
320 && gfc_option.flag_recursive)
321 gfc_warning_now ("Flag -frecursive overwrites -fmax-stack-var-size=%d",
322 gfc_option.flag_max_stack_var_size);
323 else if (gfc_option.flag_max_stack_var_size != -2
324 && gfc_option.flag_openmp)
325 gfc_warning_now ("Flag -fmax-stack-var-size=%d overwrites -frecursive "
326 "implied by -fopenmp",
327 gfc_option.flag_max_stack_var_size);
329 /* Implied -frecursive; implemented as -fmax-stack-var-size=-1. */
330 if (gfc_option.flag_max_stack_var_size == -2 && gfc_option.flag_openmp)
331 gfc_option.flag_max_stack_var_size = -1;
334 if (gfc_option.flag_max_stack_var_size == -2)
335 gfc_option.flag_max_stack_var_size = 32768;
337 /* Implement -frecursive as -fmax-stack-var-size=-1. */
338 if (gfc_option.flag_recursive)
339 gfc_option.flag_max_stack_var_size = -1;
341 /* Implement -fno-automatic as -fmax-stack-var-size=0. */
342 if (!gfc_option.flag_automatic)
343 gfc_option.flag_max_stack_var_size = 0;
347 gfc_option.warn_ampersand = 1;
348 gfc_option.warn_tabs = 0;
351 gfc_cpp_post_options ();
353 /* FIXME: return gfc_cpp_preprocess_only ();
355 The return value of this function indicates whether the
356 backend needs to be initialized. On -E, we don't need
357 the backend. However, if we return 'true' here, an
358 ICE occurs. Initializing the backend doesn't hurt much,
359 hence, for now we can live with it as is. */
364 /* Set the options for -Wall. */
367 set_Wall (int setting)
369 gfc_option.warn_aliasing = setting;
370 gfc_option.warn_ampersand = setting;
371 gfc_option.warn_line_truncation = setting;
372 gfc_option.warn_surprising = setting;
373 gfc_option.warn_tabs = !setting;
374 gfc_option.warn_underflow = setting;
375 gfc_option.warn_intrinsic_shadow = setting;
376 gfc_option.warn_intrinsics_std = setting;
377 gfc_option.warn_character_truncation = setting;
379 warn_unused = setting;
380 warn_return_type = setting;
381 warn_switch = setting;
383 /* We save the value of warn_uninitialized, since if they put
384 -Wuninitialized on the command line, we need to generate a
385 warning about not using it without also specifying -O. */
387 warn_uninitialized = 0;
388 else if (warn_uninitialized != 1)
389 warn_uninitialized = 2;
394 gfc_handle_module_path_options (const char *arg)
397 if (gfc_option.module_dir != NULL)
398 gfc_fatal_error ("gfortran: Only one -J option allowed");
400 gfc_option.module_dir = (char *) gfc_getmem (strlen (arg) + 2);
401 strcpy (gfc_option.module_dir, arg);
402 strcat (gfc_option.module_dir, "/");
404 gfc_add_include_path (gfc_option.module_dir, true);
409 gfc_handle_fpe_trap_option (const char *arg)
411 int result, pos = 0, n;
412 static const char * const exception[] = { "invalid", "denormal", "zero",
413 "overflow", "underflow",
415 static const int opt_exception[] = { GFC_FPE_INVALID, GFC_FPE_DENORMAL,
416 GFC_FPE_ZERO, GFC_FPE_OVERFLOW,
417 GFC_FPE_UNDERFLOW, GFC_FPE_PRECISION,
425 while (arg[pos] && arg[pos] != ',')
429 for (n = 0; exception[n] != NULL; n++)
431 if (exception[n] && strncmp (exception[n], arg, pos) == 0)
433 gfc_option.fpe |= opt_exception[n];
441 gfc_fatal_error ("Argument to -ffpe-trap is not valid: %s", arg);
446 /* Handle command-line options. Returns 0 if unrecognized, 1 if
447 recognized and handled. */
450 gfc_handle_option (size_t scode, const char *arg, int value)
453 enum opt_code code = (enum opt_code) scode;
455 /* Ignore file names. */
459 if (gfc_cpp_handle_option (scode, arg, value) == 1)
473 gfc_option.warn_aliasing = value;
477 gfc_option.warn_ampersand = value;
480 case OPT_Warray_temporaries:
481 gfc_option.warn_array_temp = value;
484 case OPT_Wcharacter_truncation:
485 gfc_option.warn_character_truncation = value;
488 case OPT_Wconversion:
489 gfc_option.warn_conversion = value;
492 case OPT_Wimplicit_interface:
493 gfc_option.warn_implicit_interface = value;
496 case OPT_Wline_truncation:
497 gfc_option.warn_line_truncation = value;
500 case OPT_Wreturn_type:
501 warn_return_type = value;
504 case OPT_Wsurprising:
505 gfc_option.warn_surprising = value;
509 gfc_option.warn_tabs = value;
513 gfc_option.warn_underflow = value;
516 case OPT_Wintrinsic_shadow:
517 gfc_option.warn_intrinsic_shadow = value;
520 case OPT_fall_intrinsics:
521 gfc_option.flag_all_intrinsics = 1;
525 gfc_option.flag_automatic = value;
528 case OPT_fallow_leading_underscore:
529 gfc_option.flag_allow_leading_underscore = value;
533 gfc_option.flag_backslash = value;
537 gfc_option.flag_backtrace = value;
540 case OPT_fcheck_array_temporaries:
541 gfc_option.flag_check_array_temporaries = value;
545 gfc_option.flag_dump_core = value;
548 case OPT_fcray_pointer:
549 gfc_option.flag_cray_pointer = value;
553 gfc_option.flag_f2c = value;
557 gfc_option.flag_dollar_ok = value;
560 case OPT_fexternal_blas:
561 gfc_option.flag_external_blas = value;
564 case OPT_fblas_matmul_limit_:
565 gfc_option.blas_matmul_limit = value;
568 case OPT_fd_lines_as_code:
569 gfc_option.flag_d_lines = 1;
572 case OPT_fd_lines_as_comments:
573 gfc_option.flag_d_lines = 0;
576 case OPT_fdump_parse_tree:
577 gfc_option.dump_parse_tree = value;
580 case OPT_ffixed_form:
581 gfc_option.source_form = FORM_FIXED;
584 case OPT_ffixed_line_length_none:
585 gfc_option.fixed_line_length = 0;
588 case OPT_ffixed_line_length_:
589 if (value != 0 && value < 7)
590 gfc_fatal_error ("Fixed line length must be at least seven.");
591 gfc_option.fixed_line_length = value;
595 gfc_option.source_form = FORM_FREE;
599 gfc_option.flag_openmp = value;
602 case OPT_ffree_line_length_none:
603 gfc_option.free_line_length = 0;
606 case OPT_ffree_line_length_:
607 if (value != 0 && value < 4)
608 gfc_fatal_error ("Free line length must be at least three.");
609 gfc_option.free_line_length = value;
612 case OPT_funderscoring:
613 gfc_option.flag_underscoring = value;
616 case OPT_fsecond_underscore:
617 gfc_option.flag_second_underscore = value;
620 case OPT_static_libgfortran:
621 #ifndef HAVE_LD_STATIC_DYNAMIC
622 gfc_fatal_error ("-static-libgfortran is not supported in this "
627 case OPT_fimplicit_none:
628 gfc_option.flag_implicit_none = value;
631 case OPT_fintrinsic_modules_path:
632 gfc_add_include_path (arg, false);
633 gfc_add_intrinsic_modules_path (arg);
636 case OPT_fmax_errors_:
637 gfc_option.max_errors = value;
640 case OPT_fmax_stack_var_size_:
641 gfc_option.flag_max_stack_var_size = value;
644 case OPT_fmodule_private:
645 gfc_option.flag_module_private = value;
648 case OPT_frange_check:
649 gfc_option.flag_range_check = value;
652 case OPT_fpack_derived:
653 gfc_option.flag_pack_derived = value;
656 case OPT_frepack_arrays:
657 gfc_option.flag_repack_arrays = value;
660 case OPT_fpreprocessed:
661 gfc_option.flag_preprocessed = value;
664 case OPT_fmax_identifier_length_:
665 if (value > GFC_MAX_SYMBOL_LEN)
666 gfc_fatal_error ("Maximum supported identifier length is %d",
668 gfc_option.max_identifier_length = value;
671 case OPT_fdefault_integer_8:
672 gfc_option.flag_default_integer = value;
675 case OPT_fdefault_real_8:
676 gfc_option.flag_default_real = value;
679 case OPT_fdefault_double_8:
680 gfc_option.flag_default_double = value;
683 case OPT_finit_local_zero:
684 gfc_option.flag_init_integer = GFC_INIT_INTEGER_ON;
685 gfc_option.flag_init_integer_value = 0;
686 gfc_option.flag_init_real = GFC_INIT_REAL_ZERO;
687 gfc_option.flag_init_logical = GFC_INIT_LOGICAL_FALSE;
688 gfc_option.flag_init_character = GFC_INIT_CHARACTER_ON;
689 gfc_option.flag_init_character_value = (char)0;
692 case OPT_finit_logical_:
693 if (!strcasecmp (arg, "false"))
694 gfc_option.flag_init_logical = GFC_INIT_LOGICAL_FALSE;
695 else if (!strcasecmp (arg, "true"))
696 gfc_option.flag_init_logical = GFC_INIT_LOGICAL_TRUE;
698 gfc_fatal_error ("Unrecognized option to -finit-logical: %s",
702 case OPT_finit_real_:
703 if (!strcasecmp (arg, "zero"))
704 gfc_option.flag_init_real = GFC_INIT_REAL_ZERO;
705 else if (!strcasecmp (arg, "nan"))
706 gfc_option.flag_init_real = GFC_INIT_REAL_NAN;
707 else if (!strcasecmp (arg, "inf"))
708 gfc_option.flag_init_real = GFC_INIT_REAL_INF;
709 else if (!strcasecmp (arg, "-inf"))
710 gfc_option.flag_init_real = GFC_INIT_REAL_NEG_INF;
712 gfc_fatal_error ("Unrecognized option to -finit-real: %s",
716 case OPT_finit_integer_:
717 gfc_option.flag_init_integer = GFC_INIT_INTEGER_ON;
718 gfc_option.flag_init_integer_value = atoi (arg);
721 case OPT_finit_character_:
722 if (value >= 0 && value <= 127)
724 gfc_option.flag_init_character = GFC_INIT_CHARACTER_ON;
725 gfc_option.flag_init_character_value = (char)value;
728 gfc_fatal_error ("The value of n in -finit-character=n must be "
729 "between 0 and 127");
733 gfc_add_include_path (arg, true);
737 gfc_handle_module_path_options (arg);
741 gfc_option.flag_sign_zero = value;
745 gfc_handle_fpe_trap_option (arg);
749 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95 | GFC_STD_F77;
750 gfc_option.warn_std = GFC_STD_F95_OBS;
751 gfc_option.max_continue_fixed = 19;
752 gfc_option.max_continue_free = 39;
753 gfc_option.max_identifier_length = 31;
754 gfc_option.warn_ampersand = 1;
755 gfc_option.warn_tabs = 0;
759 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
760 | GFC_STD_F2003 | GFC_STD_F95;
761 gfc_option.warn_std = GFC_STD_F95_OBS;
762 gfc_option.max_identifier_length = 63;
763 gfc_option.warn_ampersand = 1;
764 gfc_option.warn_tabs = 0;
768 gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
769 | GFC_STD_F2003 | GFC_STD_F95 | GFC_STD_F2008;
770 gfc_option.warn_std = GFC_STD_F95_OBS;
771 gfc_option.max_identifier_length = 63;
772 gfc_option.warn_ampersand = 1;
773 gfc_option.warn_tabs = 0;
777 set_default_std_flags ();
781 set_default_std_flags ();
782 gfc_option.warn_std = 0;
785 case OPT_Wintrinsics_std:
786 gfc_option.warn_intrinsics_std = value;
789 case OPT_fshort_enums:
790 gfc_option.fshort_enums = 1;
793 case OPT_fconvert_little_endian:
794 gfc_option.convert = GFC_CONVERT_LITTLE;
797 case OPT_fconvert_big_endian:
798 gfc_option.convert = GFC_CONVERT_BIG;
801 case OPT_fconvert_native:
802 gfc_option.convert = GFC_CONVERT_NATIVE;
805 case OPT_fconvert_swap:
806 gfc_option.convert = GFC_CONVERT_SWAP;
809 case OPT_frecord_marker_4:
810 gfc_option.record_marker = 4;
813 case OPT_frecord_marker_8:
814 gfc_option.record_marker = 8;
817 case OPT_fmax_subrecord_length_:
818 if (value > MAX_SUBRECORD_LENGTH)
819 gfc_fatal_error ("Maximum subrecord length cannot exceed %d",
820 MAX_SUBRECORD_LENGTH);
822 gfc_option.max_subrecord_length = value;
826 gfc_option.flag_recursive = 1;