gcc/fortran/options.c

   1 /* Parse and display command line options.
   2    Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
   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_F95 | GFC_STD_F77 | GFC_STD_GNU
  46     | 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 = 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.verbose = 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     ".f", FORM_FIXED}
 159     ,
 160     {
 161     ".for", FORM_FIXED}
 162     ,
 163     {
 164     ".ftn", FORM_FIXED}
 165     ,
 166     {
 167     "", FORM_UNKNOWN}
 168   };            /* sentinel value */
 169
 170   gfc_source_form f_form;
 171   const char *fileext;
 172   int i;
 173
 174   /* Find end of file name.  Note, filename is either a NULL pointer or
 175      a NUL terminated string.  */
 176   i = 0;
 177   while (filename[i] != '\0')
 178     i++;
 179
 180   /* Find last period.  */
 181   while (i >= 0 && (filename[i] != '.'))
 182     i--;
 183
 184   /* Did we see a file extension?  */
 185   if (i < 0)
 186     return FORM_UNKNOWN; /* Nope  */
 187
 188   /* Get file extension and compare it to others.  */
 189   fileext = &(filename[i]);
 190
 191   i = -1;
 192   f_form = FORM_UNKNOWN;
 193   do
 194     {
 195       i++;
 196       if (strcasecmp (fileext, exttype[i].extension) == 0)
 197         {
 198           f_form = exttype[i].form;
 199           break;
 200         }
 201     }
 202   while (exttype[i].form != FORM_UNKNOWN);
 203
 204   return f_form;
 205 }
 206
 207
 208 /* Finalize commandline options.  */
 209
 210 bool
 211 gfc_post_options (const char **pfilename)
 212 {
 213   const char *filename = *pfilename, *canon_source_file = NULL;
 214   char *source_path;
 215   int i;
 216
 217   /* Issue an error if -fwhole-program was used.  */
 218   if (flag_whole_program)
 219     gfc_fatal_error ("Option -fwhole-program is not supported for Fortran");
 220
 221   /* Verify the input file name.  */
 222   if (!filename || strcmp (filename, "-") == 0)
 223     {
 224       filename = "";
 225     }
 226
 227   if (gfc_option.flag_preprocessed)
 228     {
 229       /* For preprocessed files, if the first tokens are of the form # NUM.
 230          handle the directives so we know the original file name.  */
 231       gfc_source_file = gfc_read_orig_filename (filename, &canon_source_file);
 232       if (gfc_source_file == NULL)
 233         gfc_source_file = filename;
 234       else
 235         *pfilename = gfc_source_file;
 236     }
 237   else
 238     gfc_source_file = filename;
 239
 240   if (canon_source_file == NULL)
 241     canon_source_file = gfc_source_file;
 242
 243   /* Adds the path where the source file is to the list of include files.  */
 244
 245   i = strlen (canon_source_file);
 246   while (i > 0 && !IS_DIR_SEPARATOR (canon_source_file[i]))
 247     i--;
 248
 249   if (i != 0)
 250     {
 251       source_path = alloca (i + 1);
 252       memcpy (source_path, canon_source_file, i);
 253       source_path[i] = 0;
 254       gfc_add_include_path (source_path, true);
 255     }
 256   else
 257     gfc_add_include_path (".", true);
 258
 259   if (canon_source_file != gfc_source_file)
 260     gfc_free (CONST_CAST (char *, canon_source_file));
 261
 262   /* Decide which form the file will be read in as.  */
 263
 264   if (gfc_option.source_form != FORM_UNKNOWN)
 265     gfc_current_form = gfc_option.source_form;
 266   else
 267     {
 268       gfc_current_form = form_from_filename (filename);
 269
 270       if (gfc_current_form == FORM_UNKNOWN)
 271         {
 272           gfc_current_form = FORM_FREE;
 273           gfc_warning_now ("Reading file '%s' as free form",
 274                            (filename[0] == '\0') ? "<stdin>" : filename);
 275         }
 276     }
 277
 278   /* If the user specified -fd-lines-as-{code|comments} verify that we're
 279      in fixed form.  */
 280   if (gfc_current_form == FORM_FREE)
 281     {
 282       if (gfc_option.flag_d_lines == 0)
 283         gfc_warning_now ("'-fd-lines-as-comments' has no effect "
 284                          "in free form");
 285       else if (gfc_option.flag_d_lines == 1)
 286         gfc_warning_now ("'-fd-lines-as-code' has no effect in free form");
 287     }
 288
 289   flag_inline_trees = 1;
 290
 291   /* Use tree inlining.  */
 292   if (!flag_no_inline)
 293     flag_no_inline = 1;
 294   if (flag_inline_functions)
 295     flag_inline_trees = 2;
 296
 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;
 303
 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
 306      otherwise.  */
 307   if (gfc_option.flag_second_underscore == -1)
 308     gfc_option.flag_second_underscore = gfc_option.flag_f2c;
 309
 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 "
 318                      "-fopenmp");
 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);
 328
 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;
 332
 333   /* Set default.  */
 334   if (gfc_option.flag_max_stack_var_size == -2)
 335     gfc_option.flag_max_stack_var_size = 32768;
 336
 337   /* Implement -frecursive as -fmax-stack-var-size=-1.  */
 338   if (gfc_option.flag_recursive)
 339     gfc_option.flag_max_stack_var_size = -1;
 340
 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;
 344
 345   if (pedantic)
 346     {
 347       gfc_option.warn_ampersand = 1;
 348       gfc_option.warn_tabs = 0;
 349     }
 350
 351   if (gfc_option.flag_all_intrinsics)
 352     gfc_option.warn_nonstd_intrinsics = 0;
 353
 354   return false;
 355 }
 356
 357
 358 /* Set the options for -Wall.  */
 359
 360 static void
 361 set_Wall (int setting)
 362 {
 363   gfc_option.warn_aliasing = setting;
 364   gfc_option.warn_ampersand = setting;
 365   gfc_option.warn_line_truncation = setting;
 366   gfc_option.warn_nonstd_intrinsics = setting;
 367   gfc_option.warn_surprising = setting;
 368   gfc_option.warn_tabs = !setting;
 369   gfc_option.warn_underflow = setting;
 370   gfc_option.warn_character_truncation = setting;
 371
 372   set_Wunused (setting);
 373   warn_return_type = setting;
 374   warn_switch = setting;
 375
 376   /* We save the value of warn_uninitialized, since if they put
 377      -Wuninitialized on the command line, we need to generate a
 378      warning about not using it without also specifying -O.  */
 379   if (setting == 0)
 380     warn_uninitialized = 0;
 381   else if (warn_uninitialized != 1)
 382     warn_uninitialized = 2;
 383 }
 384
 385
 386 static void
 387 gfc_handle_module_path_options (const char *arg)
 388 {
 389
 390   if (gfc_option.module_dir != NULL)
 391     {
 392       gfc_status ("gfortran: Only one -M option allowed\n");
 393       exit (3);
 394     }
 395
 396   if (arg == NULL)
 397     {
 398       gfc_status ("gfortran: Directory required after -M\n");
 399       exit (3);
 400     }
 401
 402   gfc_option.module_dir = (char *) gfc_getmem (strlen (arg) + 2);
 403   strcpy (gfc_option.module_dir, arg);
 404   strcat (gfc_option.module_dir, "/");
 405
 406   gfc_add_include_path (gfc_option.module_dir, true);
 407 }
 408
 409
 410 static void
 411 gfc_handle_fpe_trap_option (const char *arg)
 412 {
 413   int result, pos = 0, n;
 414   static const char * const exception[] = { "invalid", "denormal", "zero",
 415                                             "overflow", "underflow",
 416                                             "precision", NULL };
 417   static const int opt_exception[] = { GFC_FPE_INVALID, GFC_FPE_DENORMAL,
 418                                        GFC_FPE_ZERO, GFC_FPE_OVERFLOW,
 419                                        GFC_FPE_UNDERFLOW, GFC_FPE_PRECISION,
 420                                        0 };
 421
 422   while (*arg)
 423     {
 424       while (*arg == ',')
 425         arg++;
 426
 427       while (arg[pos] && arg[pos] != ',')
 428         pos++;
 429
 430       result = 0;
 431       for (n = 0; exception[n] != NULL; n++)
 432         {
 433           if (exception[n] && strncmp (exception[n], arg, pos) == 0)
 434             {
 435               gfc_option.fpe |= opt_exception[n];
 436               arg += pos;
 437               pos = 0;
 438               result = 1;
 439               break;
 440             }
 441         }
 442       if (!result)
 443         gfc_fatal_error ("Argument to -ffpe-trap is not valid: %s", arg);
 444     }
 445 }
 446
 447
 448 /* Handle command-line options.  Returns 0 if unrecognized, 1 if
 449    recognized and handled.  */
 450
 451 int
 452 gfc_handle_option (size_t scode, const char *arg, int value)
 453 {
 454   int result = 1;
 455   enum opt_code code = (enum opt_code) scode;
 456
 457   /* Ignore file names.  */
 458   if (code == N_OPTS)
 459     return 1;
 460
 461   switch (code)
 462     {
 463     default:
 464       result = 0;
 465       break;
 466
 467     case OPT_Wall:
 468       set_Wall (value);
 469       break;
 470
 471     case OPT_Waliasing:
 472       gfc_option.warn_aliasing = value;
 473       break;
 474
 475     case OPT_Wampersand:
 476       gfc_option.warn_ampersand = value;
 477       break;
 478
 479     case OPT_Wcharacter_truncation:
 480       gfc_option.warn_character_truncation = value;
 481       break;
 482
 483     case OPT_Wconversion:
 484       gfc_option.warn_conversion = value;
 485       break;
 486
 487     case OPT_Wimplicit_interface:
 488       gfc_option.warn_implicit_interface = value;
 489       break;
 490
 491     case OPT_Wline_truncation:
 492       gfc_option.warn_line_truncation = value;
 493       break;
 494
 495     case OPT_Wsurprising:
 496       gfc_option.warn_surprising = value;
 497       break;
 498
 499     case OPT_Wtabs:
 500       gfc_option.warn_tabs = value;
 501       break;
 502
 503     case OPT_Wunderflow:
 504       gfc_option.warn_underflow = value;
 505       break;
 506
 507     case OPT_fall_intrinsics:
 508       gfc_option.flag_all_intrinsics = 1;
 509       break;
 510
 511     case OPT_fautomatic:
 512       gfc_option.flag_automatic = value;
 513       break;
 514
 515     case OPT_fallow_leading_underscore:
 516       gfc_option.flag_allow_leading_underscore = value;
 517       break;
 518
 519     case OPT_fbackslash:
 520       gfc_option.flag_backslash = value;
 521       break;
 522
 523     case OPT_fbacktrace:
 524       gfc_option.flag_backtrace = value;
 525       break;
 526
 527     case OPT_fdump_core:
 528       gfc_option.flag_dump_core = value;
 529       break;
 530
 531     case OPT_fcray_pointer:
 532       gfc_option.flag_cray_pointer = value;
 533       break;
 534
 535     case OPT_ff2c:
 536       gfc_option.flag_f2c = value;
 537       break;
 538
 539     case OPT_fdollar_ok:
 540       gfc_option.flag_dollar_ok = value;
 541       break;
 542
 543     case OPT_fexternal_blas:
 544       gfc_option.flag_external_blas = value;
 545       break;
 546
 547     case OPT_fblas_matmul_limit_:
 548       gfc_option.blas_matmul_limit = value;
 549       break;
 550
 551     case OPT_fd_lines_as_code:
 552       gfc_option.flag_d_lines = 1;
 553       break;
 554
 555     case OPT_fd_lines_as_comments:
 556       gfc_option.flag_d_lines = 0;
 557       break;
 558
 559     case OPT_fdump_parse_tree:
 560       gfc_option.verbose = value;
 561       break;
 562
 563     case OPT_ffixed_form:
 564       gfc_option.source_form = FORM_FIXED;
 565       break;
 566
 567     case OPT_ffixed_line_length_none:
 568       gfc_option.fixed_line_length = 0;
 569       break;
 570
 571     case OPT_ffixed_line_length_:
 572       if (value != 0 && value < 7)
 573         gfc_fatal_error ("Fixed line length must be at least seven.");
 574       gfc_option.fixed_line_length = value;
 575       break;
 576
 577     case OPT_ffree_form:
 578       gfc_option.source_form = FORM_FREE;
 579       break;
 580
 581     case OPT_fopenmp:
 582       gfc_option.flag_openmp = value;
 583       break;
 584
 585     case OPT_ffree_line_length_none:
 586       gfc_option.free_line_length = 0;
 587       break;
 588
 589     case OPT_ffree_line_length_:
 590       if (value != 0 && value < 4)
 591         gfc_fatal_error ("Free line length must be at least three.");
 592       gfc_option.free_line_length = value;
 593       break;
 594
 595     case OPT_funderscoring:
 596       gfc_option.flag_underscoring = value;
 597       break;
 598
 599     case OPT_fsecond_underscore:
 600       gfc_option.flag_second_underscore = value;
 601       break;
 602
 603     case OPT_static_libgfortran:
 604 #ifndef HAVE_LD_STATIC_DYNAMIC
 605       gfc_fatal_error ("-static-libgfortran is not supported in this "
 606                        "configuration");
 607 #endif
 608       break;
 609
 610     case OPT_fimplicit_none:
 611       gfc_option.flag_implicit_none = value;
 612       break;
 613
 614     case OPT_fintrinsic_modules_path:
 615       gfc_add_include_path (arg, false);
 616       gfc_add_intrinsic_modules_path (arg);
 617       break;
 618
 619     case OPT_fmax_errors_:
 620       gfc_option.max_errors = value;
 621       break;
 622
 623     case OPT_fmax_stack_var_size_:
 624       gfc_option.flag_max_stack_var_size = value;
 625       break;
 626
 627     case OPT_fmodule_private:
 628       gfc_option.flag_module_private = value;
 629       break;
 630
 631     case OPT_frange_check:
 632       gfc_option.flag_range_check = value;
 633       break;
 634
 635     case OPT_fpack_derived:
 636       gfc_option.flag_pack_derived = value;
 637       break;
 638
 639     case OPT_frepack_arrays:
 640       gfc_option.flag_repack_arrays = value;
 641       break;
 642
 643     case OPT_fpreprocessed:
 644       gfc_option.flag_preprocessed = value;
 645       break;
 646
 647     case OPT_fmax_identifier_length_:
 648       if (value > GFC_MAX_SYMBOL_LEN)
 649         gfc_fatal_error ("Maximum supported identifier length is %d",
 650                          GFC_MAX_SYMBOL_LEN);
 651       gfc_option.max_identifier_length = value;
 652       break;
 653
 654     case OPT_fdefault_integer_8:
 655       gfc_option.flag_default_integer = value;
 656       break;
 657
 658     case OPT_fdefault_real_8:
 659       gfc_option.flag_default_real = value;
 660       break;
 661
 662     case OPT_fdefault_double_8:
 663       gfc_option.flag_default_double = value;
 664       break;
 665
 666     case OPT_finit_local_zero:
 667       gfc_option.flag_init_integer = GFC_INIT_INTEGER_ON;
 668       gfc_option.flag_init_integer_value = 0;
 669       gfc_option.flag_init_real = GFC_INIT_REAL_ZERO;
 670       gfc_option.flag_init_logical = GFC_INIT_LOGICAL_FALSE;
 671       gfc_option.flag_init_character = GFC_INIT_CHARACTER_ON;
 672       gfc_option.flag_init_character_value = (char)0;
 673       break;
 674
 675     case OPT_finit_logical_:
 676       if (!strcasecmp (arg, "false"))
 677         gfc_option.flag_init_logical = GFC_INIT_LOGICAL_FALSE;
 678       else if (!strcasecmp (arg, "true"))
 679         gfc_option.flag_init_logical = GFC_INIT_LOGICAL_TRUE;
 680       else
 681         gfc_fatal_error ("Unrecognized option to -finit-logical: %s",
 682                          arg);
 683       break;
 684
 685     case OPT_finit_real_:
 686       if (!strcasecmp (arg, "zero"))
 687         gfc_option.flag_init_real = GFC_INIT_REAL_ZERO;
 688       else if (!strcasecmp (arg, "nan"))
 689         gfc_option.flag_init_real = GFC_INIT_REAL_NAN;
 690       else if (!strcasecmp (arg, "inf"))
 691         gfc_option.flag_init_real = GFC_INIT_REAL_INF;
 692       else if (!strcasecmp (arg, "-inf"))
 693         gfc_option.flag_init_real = GFC_INIT_REAL_NEG_INF;
 694       else
 695         gfc_fatal_error ("Unrecognized option to -finit-real: %s",
 696                          arg);
 697       break;
 698
 699     case OPT_finit_integer_:
 700       gfc_option.flag_init_integer = GFC_INIT_INTEGER_ON;
 701       gfc_option.flag_init_integer_value = atoi (arg);
 702       break;
 703
 704     case OPT_finit_character_:
 705       if (value >= 0 && value <= 127)
 706         {
 707           gfc_option.flag_init_character = GFC_INIT_CHARACTER_ON;
 708           gfc_option.flag_init_character_value = (char)value;
 709         }
 710       else
 711         gfc_fatal_error ("The value of n in -finit-character=n must be "
 712                          "between 0 and 127");
 713       break;
 714
 715     case OPT_I:
 716       gfc_add_include_path (arg, true);
 717       break;
 718
 719     case OPT_J:
 720     case OPT_M:
 721       gfc_handle_module_path_options (arg);
 722       break;
 723
 724     case OPT_fsign_zero:
 725       gfc_option.flag_sign_zero = value;
 726       break;
 727
 728     case OPT_ffpe_trap_:
 729       gfc_handle_fpe_trap_option (arg);
 730       break;
 731
 732     case OPT_std_f95:
 733       gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95 | GFC_STD_F77;
 734       gfc_option.warn_std = GFC_STD_F95_OBS;
 735       gfc_option.max_identifier_length = 31;
 736       gfc_option.warn_ampersand = 1;
 737       gfc_option.warn_tabs = 0;
 738       break;
 739
 740     case OPT_std_f2003:
 741       gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
 742         | GFC_STD_F2003 | GFC_STD_F95;
 743       gfc_option.warn_std = GFC_STD_F95_OBS;
 744       gfc_option.max_continue_fixed = 255;
 745       gfc_option.max_continue_free = 255;
 746       gfc_option.max_identifier_length = 63;
 747       gfc_option.warn_ampersand = 1;
 748       gfc_option.warn_tabs = 0;
 749       break;
 750
 751     case OPT_std_gnu:
 752       set_default_std_flags ();
 753       break;
 754
 755     case OPT_std_legacy:
 756       set_default_std_flags ();
 757       gfc_option.warn_std = 0;
 758       break;
 759
 760     case OPT_Wnonstd_intrinsics:
 761       gfc_option.warn_nonstd_intrinsics = value;
 762       break;
 763
 764     case OPT_fshort_enums:
 765       gfc_option.fshort_enums = 1;
 766       break;
 767
 768     case OPT_fconvert_little_endian:
 769       gfc_option.convert = GFC_CONVERT_LITTLE;
 770       break;
 771
 772     case OPT_fconvert_big_endian:
 773       gfc_option.convert = GFC_CONVERT_BIG;
 774       break;
 775
 776     case OPT_fconvert_native:
 777       gfc_option.convert = GFC_CONVERT_NATIVE;
 778       break;
 779
 780     case OPT_fconvert_swap:
 781       gfc_option.convert = GFC_CONVERT_SWAP;
 782       break;
 783
 784     case OPT_frecord_marker_4:
 785       gfc_option.record_marker = 4;
 786       break;
 787
 788     case OPT_frecord_marker_8:
 789       gfc_option.record_marker = 8;
 790       break;
 791
 792     case OPT_fmax_subrecord_length_:
 793       if (value > MAX_SUBRECORD_LENGTH)
 794         gfc_fatal_error ("Maximum subrecord length cannot exceed %d",
 795                          MAX_SUBRECORD_LENGTH);
 796
 797       gfc_option.max_subrecord_length = value;
 798       break;
 799
 800     case OPT_frecursive:
 801       gfc_option.flag_recursive = 1;
 802       break;
 803     }
 804
 805   return result;
 806 }