gcc/fortran/options.c

   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
   5
   6 This file is part of GCC.
   7
   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
  11 version.
  12
  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
  16 for more details.
  17
  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/>.  */
  21
  22 #include "config.h"
  23 #include "system.h"
  24 #include "coretypes.h"
  25 #include "tree.h"
  26 #include "flags.h"
  27 #include "intl.h"
  28 #include "opts.h"
  29 #include "options.h"
  30 #include "params.h"
  31 #include "tree-inline.h"
  32 #include "gfortran.h"
  33 #include "target.h"
  34
  35 gfc_option_t gfc_option;
  36
  37
  38 /* Set flags that control warnings and errors for different
  39    Fortran standards to their default values.  */
  40
  41 static void
  42 set_default_std_flags (void)
  43 {
  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;
  48 }
  49
  50 /* Get ready for options handling.  */
  51
  52 unsigned int
  53 gfc_init_options (unsigned int argc ATTRIBUTE_UNUSED,
  54                   const char **argv ATTRIBUTE_UNUSED)
  55 {
  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;
  68
  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;
  79
  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;
  89
  90   /* Default value of flag_max_stack_var_size is set in gfc_post_options.  */
  91   gfc_option.flag_max_stack_var_size = -2;
  92
  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;
 116
 117   gfc_option.fpe = 0;
 118
 119   /* Argument pointers cannot point to anything but their argument.  */
 120   flag_argument_noalias = 3;
 121
 122   flag_errno_math = 0;
 123
 124   set_default_std_flags ();
 125
 126   gfc_option.warn_nonstd_intrinsics = 0;
 127
 128   /* -fshort-enums can be default on some targets.  */
 129   gfc_option.fshort_enums = targetm.default_short_enums ();
 130
 131   return CL_Fortran;
 132 }
 133
 134
 135 /* Determine the source form from the filename extension.  We assume
 136    case insensitivity.  */
 137
 138 static gfc_source_form
 139 form_from_filename (const char *filename)
 140 {
 141   static const struct
 142   {
 143     const char *extension;
 144     gfc_source_form form;
 145   }
 146   exttype[] =
 147   {
 148     {
 149     ".f90", FORM_FREE}
 150     ,
 151     {
 152     ".f95", FORM_FREE}
 153     ,
 154     {
 155     ".f03", FORM_FREE}
 156     ,
 157     {
 158     ".f08", FORM_FREE}
 159     ,
 160     {
 161     ".f", FORM_FIXED}
 162     ,
 163     {
 164     ".for", FORM_FIXED}
 165     ,
 166     {
 167     ".ftn", FORM_FIXED}
 168     ,
 169     {
 170     "", FORM_UNKNOWN}
 171   };            /* sentinel value */
 172
 173   gfc_source_form f_form;
 174   const char *fileext;
 175   int i;
 176
 177   /* Find end of file name.  Note, filename is either a NULL pointer or
 178      a NUL terminated string.  */
 179   i = 0;
 180   while (filename[i] != '\0')
 181     i++;
 182
 183   /* Find last period.  */
 184   while (i >= 0 && (filename[i] != '.'))
 185     i--;
 186
 187   /* Did we see a file extension?  */
 188   if (i < 0)
 189     return FORM_UNKNOWN; /* Nope  */
 190
 191   /* Get file extension and compare it to others.  */
 192   fileext = &(filename[i]);
 193
 194   i = -1;
 195   f_form = FORM_UNKNOWN;
 196   do
 197     {
 198       i++;
 199       if (strcasecmp (fileext, exttype[i].extension) == 0)
 200         {
 201           f_form = exttype[i].form;
 202           break;
 203         }
 204     }
 205   while (exttype[i].form != FORM_UNKNOWN);
 206
 207   return f_form;
 208 }
 209
 210
 211 /* Finalize commandline options.  */
 212
 213 bool
 214 gfc_post_options (const char **pfilename)
 215 {
 216   const char *filename = *pfilename, *canon_source_file = NULL;
 217   char *source_path;
 218   int i;
 219
 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");
 223
 224   /* Verify the input file name.  */
 225   if (!filename || strcmp (filename, "-") == 0)
 226     {
 227       filename = "";
 228     }
 229
 230   if (gfc_option.flag_preprocessed)
 231     {
 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;
 237       else
 238         *pfilename = gfc_source_file;
 239     }
 240   else
 241     gfc_source_file = filename;
 242
 243   if (canon_source_file == NULL)
 244     canon_source_file = gfc_source_file;
 245
 246   /* Adds the path where the source file is to the list of include files.  */
 247
 248   i = strlen (canon_source_file);
 249   while (i > 0 && !IS_DIR_SEPARATOR (canon_source_file[i]))
 250     i--;
 251
 252   if (i != 0)
 253     {
 254       source_path = alloca (i + 1);
 255       memcpy (source_path, canon_source_file, i);
 256       source_path[i] = 0;
 257       gfc_add_include_path (source_path, true);
 258     }
 259   else
 260     gfc_add_include_path (".", true);
 261
 262   if (canon_source_file != gfc_source_file)
 263     gfc_free (CONST_CAST (char *, canon_source_file));
 264
 265   /* Decide which form the file will be read in as.  */
 266
 267   if (gfc_option.source_form != FORM_UNKNOWN)
 268     gfc_current_form = gfc_option.source_form;
 269   else
 270     {
 271       gfc_current_form = form_from_filename (filename);
 272
 273       if (gfc_current_form == FORM_UNKNOWN)
 274         {
 275           gfc_current_form = FORM_FREE;
 276           gfc_warning_now ("Reading file '%s' as free form",
 277                            (filename[0] == '\0') ? "<stdin>" : filename);
 278         }
 279     }
 280
 281   /* If the user specified -fd-lines-as-{code|comments} verify that we're
 282      in fixed form.  */
 283   if (gfc_current_form == FORM_FREE)
 284     {
 285       if (gfc_option.flag_d_lines == 0)
 286         gfc_warning_now ("'-fd-lines-as-comments' has no effect "
 287                          "in free form");
 288       else if (gfc_option.flag_d_lines == 1)
 289         gfc_warning_now ("'-fd-lines-as-code' has no effect in free form");
 290     }
 291
 292   flag_inline_trees = 1;
 293
 294   /* Use tree inlining.  */
 295   if (!flag_no_inline)
 296     flag_no_inline = 1;
 297   if (flag_inline_functions)
 298     flag_inline_trees = 2;
 299
 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;
 306
 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
 309      otherwise.  */
 310   if (gfc_option.flag_second_underscore == -1)
 311     gfc_option.flag_second_underscore = gfc_option.flag_f2c;
 312
 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 "
 321                      "-fopenmp");
 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);
 331
 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;
 335
 336   /* Set default.  */
 337   if (gfc_option.flag_max_stack_var_size == -2)
 338     gfc_option.flag_max_stack_var_size = 32768;
 339
 340   /* Implement -frecursive as -fmax-stack-var-size=-1.  */
 341   if (gfc_option.flag_recursive)
 342     gfc_option.flag_max_stack_var_size = -1;
 343
 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;
 347
 348   if (pedantic)
 349     {
 350       gfc_option.warn_ampersand = 1;
 351       gfc_option.warn_tabs = 0;
 352     }
 353
 354   if (gfc_option.flag_all_intrinsics)
 355     gfc_option.warn_nonstd_intrinsics = 0;
 356
 357   return false;
 358 }
 359
 360
 361 /* Set the options for -Wall.  */
 362
 363 static void
 364 set_Wall (int setting)
 365 {
 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;
 374
 375   set_Wunused (setting);
 376   warn_return_type = setting;
 377   warn_switch = setting;
 378
 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.  */
 382   if (setting == 0)
 383     warn_uninitialized = 0;
 384   else if (warn_uninitialized != 1)
 385     warn_uninitialized = 2;
 386 }
 387
 388
 389 static void
 390 gfc_handle_module_path_options (const char *arg)
 391 {
 392
 393   if (gfc_option.module_dir != NULL)
 394     gfc_fatal_error ("gfortran: Only one -J option allowed");
 395
 396   gfc_option.module_dir = (char *) gfc_getmem (strlen (arg) + 2);
 397   strcpy (gfc_option.module_dir, arg);
 398   strcat (gfc_option.module_dir, "/");
 399
 400   gfc_add_include_path (gfc_option.module_dir, true);
 401 }
 402
 403
 404 static void
 405 gfc_handle_fpe_trap_option (const char *arg)
 406 {
 407   int result, pos = 0, n;
 408   static const char * const exception[] = { "invalid", "denormal", "zero",
 409                                             "overflow", "underflow",
 410                                             "precision", NULL };
 411   static const int opt_exception[] = { GFC_FPE_INVALID, GFC_FPE_DENORMAL,
 412                                        GFC_FPE_ZERO, GFC_FPE_OVERFLOW,
 413                                        GFC_FPE_UNDERFLOW, GFC_FPE_PRECISION,
 414                                        0 };
 415
 416   while (*arg)
 417     {
 418       while (*arg == ',')
 419         arg++;
 420
 421       while (arg[pos] && arg[pos] != ',')
 422         pos++;
 423
 424       result = 0;
 425       for (n = 0; exception[n] != NULL; n++)
 426         {
 427           if (exception[n] && strncmp (exception[n], arg, pos) == 0)
 428             {
 429               gfc_option.fpe |= opt_exception[n];
 430               arg += pos;
 431               pos = 0;
 432               result = 1;
 433               break;
 434             }
 435         }
 436       if (!result)
 437         gfc_fatal_error ("Argument to -ffpe-trap is not valid: %s", arg);
 438     }
 439 }
 440
 441
 442 /* Handle command-line options.  Returns 0 if unrecognized, 1 if
 443    recognized and handled.  */
 444
 445 int
 446 gfc_handle_option (size_t scode, const char *arg, int value)
 447 {
 448   int result = 1;
 449   enum opt_code code = (enum opt_code) scode;
 450
 451   /* Ignore file names.  */
 452   if (code == N_OPTS)
 453     return 1;
 454
 455   switch (code)
 456     {
 457     default:
 458       result = 0;
 459       break;
 460
 461     case OPT_Wall:
 462       set_Wall (value);
 463       break;
 464
 465     case OPT_Waliasing:
 466       gfc_option.warn_aliasing = value;
 467       break;
 468
 469     case OPT_Wampersand:
 470       gfc_option.warn_ampersand = value;
 471       break;
 472
 473     case OPT_Wcharacter_truncation:
 474       gfc_option.warn_character_truncation = value;
 475       break;
 476
 477     case OPT_Wconversion:
 478       gfc_option.warn_conversion = value;
 479       break;
 480
 481     case OPT_Wimplicit_interface:
 482       gfc_option.warn_implicit_interface = value;
 483       break;
 484
 485     case OPT_Wline_truncation:
 486       gfc_option.warn_line_truncation = value;
 487       break;
 488
 489     case OPT_Wreturn_type:
 490       warn_return_type = value;
 491       break;
 492
 493     case OPT_Wsurprising:
 494       gfc_option.warn_surprising = value;
 495       break;
 496
 497     case OPT_Wtabs:
 498       gfc_option.warn_tabs = value;
 499       break;
 500
 501     case OPT_Wunderflow:
 502       gfc_option.warn_underflow = value;
 503       break;
 504
 505     case OPT_fall_intrinsics:
 506       gfc_option.flag_all_intrinsics = 1;
 507       break;
 508
 509     case OPT_fautomatic:
 510       gfc_option.flag_automatic = value;
 511       break;
 512
 513     case OPT_fallow_leading_underscore:
 514       gfc_option.flag_allow_leading_underscore = value;
 515       break;
 516
 517     case OPT_fbackslash:
 518       gfc_option.flag_backslash = value;
 519       break;
 520
 521     case OPT_fbacktrace:
 522       gfc_option.flag_backtrace = value;
 523       break;
 524
 525     case OPT_fdump_core:
 526       gfc_option.flag_dump_core = value;
 527       break;
 528
 529     case OPT_fcray_pointer:
 530       gfc_option.flag_cray_pointer = value;
 531       break;
 532
 533     case OPT_ff2c:
 534       gfc_option.flag_f2c = value;
 535       break;
 536
 537     case OPT_fdollar_ok:
 538       gfc_option.flag_dollar_ok = value;
 539       break;
 540
 541     case OPT_fexternal_blas:
 542       gfc_option.flag_external_blas = value;
 543       break;
 544
 545     case OPT_fblas_matmul_limit_:
 546       gfc_option.blas_matmul_limit = value;
 547       break;
 548
 549     case OPT_fd_lines_as_code:
 550       gfc_option.flag_d_lines = 1;
 551       break;
 552
 553     case OPT_fd_lines_as_comments:
 554       gfc_option.flag_d_lines = 0;
 555       break;
 556
 557     case OPT_fdump_parse_tree:
 558       gfc_option.dump_parse_tree = value;
 559       break;
 560
 561     case OPT_ffixed_form:
 562       gfc_option.source_form = FORM_FIXED;
 563       break;
 564
 565     case OPT_ffixed_line_length_none:
 566       gfc_option.fixed_line_length = 0;
 567       break;
 568
 569     case OPT_ffixed_line_length_:
 570       if (value != 0 && value < 7)
 571         gfc_fatal_error ("Fixed line length must be at least seven.");
 572       gfc_option.fixed_line_length = value;
 573       break;
 574
 575     case OPT_ffree_form:
 576       gfc_option.source_form = FORM_FREE;
 577       break;
 578
 579     case OPT_fopenmp:
 580       gfc_option.flag_openmp = value;
 581       break;
 582
 583     case OPT_ffree_line_length_none:
 584       gfc_option.free_line_length = 0;
 585       break;
 586
 587     case OPT_ffree_line_length_:
 588       if (value != 0 && value < 4)
 589         gfc_fatal_error ("Free line length must be at least three.");
 590       gfc_option.free_line_length = value;
 591       break;
 592
 593     case OPT_funderscoring:
 594       gfc_option.flag_underscoring = value;
 595       break;
 596
 597     case OPT_fsecond_underscore:
 598       gfc_option.flag_second_underscore = value;
 599       break;
 600
 601     case OPT_static_libgfortran:
 602 #ifndef HAVE_LD_STATIC_DYNAMIC
 603       gfc_fatal_error ("-static-libgfortran is not supported in this "
 604                        "configuration");
 605 #endif
 606       break;
 607
 608     case OPT_fimplicit_none:
 609       gfc_option.flag_implicit_none = value;
 610       break;
 611
 612     case OPT_fintrinsic_modules_path:
 613       gfc_add_include_path (arg, false);
 614       gfc_add_intrinsic_modules_path (arg);
 615       break;
 616
 617     case OPT_fmax_errors_:
 618       gfc_option.max_errors = value;
 619       break;
 620
 621     case OPT_fmax_stack_var_size_:
 622       gfc_option.flag_max_stack_var_size = value;
 623       break;
 624
 625     case OPT_fmodule_private:
 626       gfc_option.flag_module_private = value;
 627       break;
 628
 629     case OPT_frange_check:
 630       gfc_option.flag_range_check = value;
 631       break;
 632
 633     case OPT_fpack_derived:
 634       gfc_option.flag_pack_derived = value;
 635       break;
 636
 637     case OPT_frepack_arrays:
 638       gfc_option.flag_repack_arrays = value;
 639       break;
 640
 641     case OPT_fpreprocessed:
 642       gfc_option.flag_preprocessed = value;
 643       break;
 644
 645     case OPT_fmax_identifier_length_:
 646       if (value > GFC_MAX_SYMBOL_LEN)
 647         gfc_fatal_error ("Maximum supported identifier length is %d",
 648                          GFC_MAX_SYMBOL_LEN);
 649       gfc_option.max_identifier_length = value;
 650       break;
 651
 652     case OPT_fdefault_integer_8:
 653       gfc_option.flag_default_integer = value;
 654       break;
 655
 656     case OPT_fdefault_real_8:
 657       gfc_option.flag_default_real = value;
 658       break;
 659
 660     case OPT_fdefault_double_8:
 661       gfc_option.flag_default_double = value;
 662       break;
 663
 664     case OPT_finit_local_zero:
 665       gfc_option.flag_init_integer = GFC_INIT_INTEGER_ON;
 666       gfc_option.flag_init_integer_value = 0;
 667       gfc_option.flag_init_real = GFC_INIT_REAL_ZERO;
 668       gfc_option.flag_init_logical = GFC_INIT_LOGICAL_FALSE;
 669       gfc_option.flag_init_character = GFC_INIT_CHARACTER_ON;
 670       gfc_option.flag_init_character_value = (char)0;
 671       break;
 672
 673     case OPT_finit_logical_:
 674       if (!strcasecmp (arg, "false"))
 675         gfc_option.flag_init_logical = GFC_INIT_LOGICAL_FALSE;
 676       else if (!strcasecmp (arg, "true"))
 677         gfc_option.flag_init_logical = GFC_INIT_LOGICAL_TRUE;
 678       else
 679         gfc_fatal_error ("Unrecognized option to -finit-logical: %s",
 680                          arg);
 681       break;
 682
 683     case OPT_finit_real_:
 684       if (!strcasecmp (arg, "zero"))
 685         gfc_option.flag_init_real = GFC_INIT_REAL_ZERO;
 686       else if (!strcasecmp (arg, "nan"))
 687         gfc_option.flag_init_real = GFC_INIT_REAL_NAN;
 688       else if (!strcasecmp (arg, "inf"))
 689         gfc_option.flag_init_real = GFC_INIT_REAL_INF;
 690       else if (!strcasecmp (arg, "-inf"))
 691         gfc_option.flag_init_real = GFC_INIT_REAL_NEG_INF;
 692       else
 693         gfc_fatal_error ("Unrecognized option to -finit-real: %s",
 694                          arg);
 695       break;
 696
 697     case OPT_finit_integer_:
 698       gfc_option.flag_init_integer = GFC_INIT_INTEGER_ON;
 699       gfc_option.flag_init_integer_value = atoi (arg);
 700       break;
 701
 702     case OPT_finit_character_:
 703       if (value >= 0 && value <= 127)
 704         {
 705           gfc_option.flag_init_character = GFC_INIT_CHARACTER_ON;
 706           gfc_option.flag_init_character_value = (char)value;
 707         }
 708       else
 709         gfc_fatal_error ("The value of n in -finit-character=n must be "
 710                          "between 0 and 127");
 711       break;
 712
 713     case OPT_I:
 714       gfc_add_include_path (arg, true);
 715       break;
 716
 717     case OPT_J:
 718       gfc_handle_module_path_options (arg);
 719       break;
 720
 721     case OPT_fsign_zero:
 722       gfc_option.flag_sign_zero = value;
 723       break;
 724
 725     case OPT_ffpe_trap_:
 726       gfc_handle_fpe_trap_option (arg);
 727       break;
 728
 729     case OPT_std_f95:
 730       gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95 | GFC_STD_F77;
 731       gfc_option.warn_std = GFC_STD_F95_OBS;
 732       gfc_option.max_continue_fixed = 19;
 733       gfc_option.max_continue_free = 39;
 734       gfc_option.max_identifier_length = 31;
 735       gfc_option.warn_ampersand = 1;
 736       gfc_option.warn_tabs = 0;
 737       break;
 738
 739     case OPT_std_f2003:
 740       gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
 741         | GFC_STD_F2003 | GFC_STD_F95;
 742       gfc_option.warn_std = GFC_STD_F95_OBS;
 743       gfc_option.max_identifier_length = 63;
 744       gfc_option.warn_ampersand = 1;
 745       gfc_option.warn_tabs = 0;
 746       break;
 747
 748     case OPT_std_f2008:
 749       gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
 750         | GFC_STD_F2003 | GFC_STD_F95 | GFC_STD_F2008;
 751       gfc_option.warn_std = GFC_STD_F95_OBS;
 752       gfc_option.max_identifier_length = 63;
 753       gfc_option.warn_ampersand = 1;
 754       gfc_option.warn_tabs = 0;
 755       break;
 756
 757     case OPT_std_gnu:
 758       set_default_std_flags ();
 759       break;
 760
 761     case OPT_std_legacy:
 762       set_default_std_flags ();
 763       gfc_option.warn_std = 0;
 764       break;
 765
 766     case OPT_Wnonstd_intrinsics:
 767       gfc_option.warn_nonstd_intrinsics = value;
 768       break;
 769
 770     case OPT_fshort_enums:
 771       gfc_option.fshort_enums = 1;
 772       break;
 773
 774     case OPT_fconvert_little_endian:
 775       gfc_option.convert = GFC_CONVERT_LITTLE;
 776       break;
 777
 778     case OPT_fconvert_big_endian:
 779       gfc_option.convert = GFC_CONVERT_BIG;
 780       break;
 781
 782     case OPT_fconvert_native:
 783       gfc_option.convert = GFC_CONVERT_NATIVE;
 784       break;
 785
 786     case OPT_fconvert_swap:
 787       gfc_option.convert = GFC_CONVERT_SWAP;
 788       break;
 789
 790     case OPT_frecord_marker_4:
 791       gfc_option.record_marker = 4;
 792       break;
 793
 794     case OPT_frecord_marker_8:
 795       gfc_option.record_marker = 8;
 796       break;
 797
 798     case OPT_fmax_subrecord_length_:
 799       if (value > MAX_SUBRECORD_LENGTH)
 800         gfc_fatal_error ("Maximum subrecord length cannot exceed %d",
 801                          MAX_SUBRECORD_LENGTH);
 802
 803       gfc_option.max_subrecord_length = value;
 804       break;
 805
 806     case OPT_frecursive:
 807       gfc_option.flag_recursive = 1;
 808       break;
 809     }
 810
 811   return result;
 812 }