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 = 1;
  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     "", FORM_UNKNOWN}
 165   };            /* sentinel value */
 166
 167   gfc_source_form f_form;
 168   const char *fileext;
 169   int i;
 170
 171   /* Find end of file name.  Note, filename is either a NULL pointer or
 172      a NUL terminated string.  */
 173   i = 0;
 174   while (filename[i] != '\0')
 175     i++;
 176
 177   /* Find last period.  */
 178   while (i >= 0 && (filename[i] != '.'))
 179     i--;
 180
 181   /* Did we see a file extension?  */
 182   if (i < 0)
 183     return FORM_UNKNOWN; /* Nope  */
 184
 185   /* Get file extension and compare it to others.  */
 186   fileext = &(filename[i]);
 187
 188   i = -1;
 189   f_form = FORM_UNKNOWN;
 190   do
 191     {
 192       i++;
 193       if (strcasecmp (fileext, exttype[i].extension) == 0)
 194         {
 195           f_form = exttype[i].form;
 196           break;
 197         }
 198     }
 199   while (exttype[i].form != FORM_UNKNOWN);
 200
 201   return f_form;
 202 }
 203
 204
 205 /* Finalize commandline options.  */
 206
 207 bool
 208 gfc_post_options (const char **pfilename)
 209 {
 210   const char *filename = *pfilename, *canon_source_file = NULL;
 211   char *source_path;
 212   int i;
 213
 214   /* Issue an error if -fwhole-program was used.  */
 215   if (flag_whole_program)
 216     gfc_fatal_error ("Option -fwhole-program is not supported for Fortran");
 217
 218   /* Verify the input file name.  */
 219   if (!filename || strcmp (filename, "-") == 0)
 220     {
 221       filename = "";
 222     }
 223
 224   if (gfc_option.flag_preprocessed)
 225     {
 226       /* For preprocessed files, if the first tokens are of the form # NUM.
 227          handle the directives so we know the original file name.  */
 228       gfc_source_file = gfc_read_orig_filename (filename, &canon_source_file);
 229       if (gfc_source_file == NULL)
 230         gfc_source_file = filename;
 231       else
 232         *pfilename = gfc_source_file;
 233     }
 234   else
 235     gfc_source_file = filename;
 236
 237   if (canon_source_file == NULL)
 238     canon_source_file = gfc_source_file;
 239
 240   /* Adds the path where the source file is to the list of include files.  */
 241
 242   i = strlen (canon_source_file);
 243   while (i > 0 && !IS_DIR_SEPARATOR (canon_source_file[i]))
 244     i--;
 245
 246   if (i != 0)
 247     {
 248       source_path = alloca (i + 1);
 249       memcpy (source_path, canon_source_file, i);
 250       source_path[i] = 0;
 251       gfc_add_include_path (source_path, true);
 252     }
 253   else
 254     gfc_add_include_path (".", true);
 255
 256   if (canon_source_file != gfc_source_file)
 257     gfc_free (CONST_CAST (char *, canon_source_file));
 258
 259   /* Decide which form the file will be read in as.  */
 260
 261   if (gfc_option.source_form != FORM_UNKNOWN)
 262     gfc_current_form = gfc_option.source_form;
 263   else
 264     {
 265       gfc_current_form = form_from_filename (filename);
 266
 267       if (gfc_current_form == FORM_UNKNOWN)
 268         {
 269           gfc_current_form = FORM_FREE;
 270           gfc_warning_now ("Reading file '%s' as free form",
 271                            (filename[0] == '\0') ? "<stdin>" : filename);
 272         }
 273     }
 274
 275   /* If the user specified -fd-lines-as-{code|comments} verify that we're
 276      in fixed form.  */
 277   if (gfc_current_form == FORM_FREE)
 278     {
 279       if (gfc_option.flag_d_lines == 0)
 280         gfc_warning_now ("'-fd-lines-as-comments' has no effect "
 281                          "in free form");
 282       else if (gfc_option.flag_d_lines == 1)
 283         gfc_warning_now ("'-fd-lines-as-code' has no effect in free form");
 284     }
 285
 286   flag_inline_trees = 1;
 287
 288   /* Use tree inlining.  */
 289   if (!flag_no_inline)
 290     flag_no_inline = 1;
 291   if (flag_inline_functions)
 292     flag_inline_trees = 2;
 293
 294   /* If -pedantic, warn about the use of GNU extensions.  */
 295   if (pedantic && (gfc_option.allow_std & GFC_STD_GNU) != 0)
 296     gfc_option.warn_std |= GFC_STD_GNU;
 297   /* -std=legacy -pedantic is effectively -std=gnu.  */
 298   if (pedantic && (gfc_option.allow_std & GFC_STD_LEGACY) != 0)
 299     gfc_option.warn_std |= GFC_STD_F95_OBS | GFC_STD_F95_DEL | GFC_STD_LEGACY;
 300
 301   /* If the user didn't explicitly specify -f(no)-second-underscore we
 302      use it if we're trying to be compatible with f2c, and not
 303      otherwise.  */
 304   if (gfc_option.flag_second_underscore == -1)
 305     gfc_option.flag_second_underscore = gfc_option.flag_f2c;
 306
 307   if (!gfc_option.flag_automatic && gfc_option.flag_max_stack_var_size != -2
 308       && gfc_option.flag_max_stack_var_size != 0)
 309     gfc_warning_now ("Flag -fno-automatic overwrites -fmax-stack-var-size=%d",
 310                      gfc_option.flag_max_stack_var_size);
 311   else if (!gfc_option.flag_automatic && gfc_option.flag_recursive)
 312     gfc_warning_now ("Flag -fno-automatic overwrites -frecursive");
 313   else if (!gfc_option.flag_automatic && gfc_option.flag_openmp)
 314     gfc_warning_now ("Flag -fno-automatic overwrites -frecursive implied by "
 315                      "-fopenmp");
 316   else if (gfc_option.flag_max_stack_var_size != -2
 317            && gfc_option.flag_recursive)
 318     gfc_warning_now ("Flag -frecursive overwrites -fmax-stack-var-size=%d",
 319                      gfc_option.flag_max_stack_var_size);
 320   else if (gfc_option.flag_max_stack_var_size != -2
 321            && gfc_option.flag_openmp)
 322     gfc_warning_now ("Flag -fmax-stack-var-size=%d overwrites -frecursive "
 323                      "implied by -fopenmp",
 324                      gfc_option.flag_max_stack_var_size);
 325
 326   /* Implied -frecursive; implemented as -fmax-stack-var-size=-1.  */
 327   if (gfc_option.flag_max_stack_var_size == -2 && gfc_option.flag_openmp)
 328     gfc_option.flag_max_stack_var_size = -1;
 329
 330   /* Set default.  */
 331   if (gfc_option.flag_max_stack_var_size == -2)
 332     gfc_option.flag_max_stack_var_size = 32768;
 333
 334   /* Implement -frecursive as -fmax-stack-var-size=-1.  */
 335   if (gfc_option.flag_recursive)
 336     gfc_option.flag_max_stack_var_size = -1;
 337
 338   /* Implement -fno-automatic as -fmax-stack-var-size=0.  */
 339   if (!gfc_option.flag_automatic)
 340     gfc_option.flag_max_stack_var_size = 0;
 341
 342   if (pedantic)
 343     {
 344       gfc_option.warn_ampersand = 1;
 345       gfc_option.warn_tabs = 0;
 346     }
 347
 348   if (gfc_option.flag_all_intrinsics)
 349     gfc_option.warn_nonstd_intrinsics = 0;
 350
 351   return false;
 352 }
 353
 354
 355 /* Set the options for -Wall.  */
 356
 357 static void
 358 set_Wall (int setting)
 359 {
 360   gfc_option.warn_aliasing = setting;
 361   gfc_option.warn_ampersand = setting;
 362   gfc_option.warn_line_truncation = setting;
 363   gfc_option.warn_nonstd_intrinsics = setting;
 364   gfc_option.warn_surprising = setting;
 365   gfc_option.warn_tabs = !setting;
 366   gfc_option.warn_underflow = setting;
 367   gfc_option.warn_character_truncation = setting;
 368
 369   set_Wunused (setting);
 370   warn_return_type = setting;
 371   warn_switch = setting;
 372
 373   /* We save the value of warn_uninitialized, since if they put
 374      -Wuninitialized on the command line, we need to generate a
 375      warning about not using it without also specifying -O.  */
 376   if (setting == 0)
 377     warn_uninitialized = 0;
 378   else if (warn_uninitialized != 1)
 379     warn_uninitialized = 2;
 380 }
 381
 382
 383 static void
 384 gfc_handle_module_path_options (const char *arg)
 385 {
 386
 387   if (gfc_option.module_dir != NULL)
 388     {
 389       gfc_status ("gfortran: Only one -M option allowed\n");
 390       exit (3);
 391     }
 392
 393   if (arg == NULL)
 394     {
 395       gfc_status ("gfortran: Directory required after -M\n");
 396       exit (3);
 397     }
 398
 399   gfc_option.module_dir = (char *) gfc_getmem (strlen (arg) + 2);
 400   strcpy (gfc_option.module_dir, arg);
 401   strcat (gfc_option.module_dir, "/");
 402
 403   gfc_add_include_path (gfc_option.module_dir, true);
 404 }
 405
 406
 407 static void
 408 gfc_handle_fpe_trap_option (const char *arg)
 409 {
 410   int result, pos = 0, n;
 411   static const char * const exception[] = { "invalid", "denormal", "zero",
 412                                             "overflow", "underflow",
 413                                             "precision", NULL };
 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,
 417                                        0 };
 418
 419   while (*arg)
 420     {
 421       while (*arg == ',')
 422         arg++;
 423
 424       while (arg[pos] && arg[pos] != ',')
 425         pos++;
 426
 427       result = 0;
 428       for (n = 0; exception[n] != NULL; n++)
 429         {
 430           if (exception[n] && strncmp (exception[n], arg, pos) == 0)
 431             {
 432               gfc_option.fpe |= opt_exception[n];
 433               arg += pos;
 434               pos = 0;
 435               result = 1;
 436               break;
 437             }
 438         }
 439       if (!result)
 440         gfc_fatal_error ("Argument to -ffpe-trap is not valid: %s", arg);
 441     }
 442 }
 443
 444
 445 /* Handle command-line options.  Returns 0 if unrecognized, 1 if
 446    recognized and handled.  */
 447
 448 int
 449 gfc_handle_option (size_t scode, const char *arg, int value)
 450 {
 451   int result = 1;
 452   enum opt_code code = (enum opt_code) scode;
 453
 454   /* Ignore file names.  */
 455   if (code == N_OPTS)
 456     return 1;
 457
 458   switch (code)
 459     {
 460     default:
 461       result = 0;
 462       break;
 463
 464     case OPT_Wall:
 465       set_Wall (value);
 466       break;
 467
 468     case OPT_Waliasing:
 469       gfc_option.warn_aliasing = value;
 470       break;
 471
 472     case OPT_Wampersand:
 473       gfc_option.warn_ampersand = value;
 474       break;
 475
 476     case OPT_Wcharacter_truncation:
 477       gfc_option.warn_character_truncation = value;
 478       break;
 479
 480     case OPT_Wconversion:
 481       gfc_option.warn_conversion = value;
 482       break;
 483
 484     case OPT_Wimplicit_interface:
 485       gfc_option.warn_implicit_interface = value;
 486       break;
 487
 488     case OPT_Wline_truncation:
 489       gfc_option.warn_line_truncation = value;
 490       break;
 491
 492     case OPT_Wsurprising:
 493       gfc_option.warn_surprising = value;
 494       break;
 495
 496     case OPT_Wtabs:
 497       gfc_option.warn_tabs = value;
 498       break;
 499
 500     case OPT_Wunderflow:
 501       gfc_option.warn_underflow = value;
 502       break;
 503
 504     case OPT_fall_intrinsics:
 505       gfc_option.flag_all_intrinsics = 1;
 506       break;
 507
 508     case OPT_fautomatic:
 509       gfc_option.flag_automatic = value;
 510       break;
 511
 512     case OPT_fallow_leading_underscore:
 513       gfc_option.flag_allow_leading_underscore = value;
 514       break;
 515
 516     case OPT_fbackslash:
 517       gfc_option.flag_backslash = value;
 518       break;
 519
 520     case OPT_fbacktrace:
 521       gfc_option.flag_backtrace = value;
 522       break;
 523
 524     case OPT_fdump_core:
 525       gfc_option.flag_dump_core = value;
 526       break;
 527
 528     case OPT_fcray_pointer:
 529       gfc_option.flag_cray_pointer = value;
 530       break;
 531
 532     case OPT_ff2c:
 533       gfc_option.flag_f2c = value;
 534       break;
 535
 536     case OPT_fdollar_ok:
 537       gfc_option.flag_dollar_ok = value;
 538       break;
 539
 540     case OPT_fexternal_blas:
 541       gfc_option.flag_external_blas = value;
 542       break;
 543
 544     case OPT_fblas_matmul_limit_:
 545       gfc_option.blas_matmul_limit = value;
 546       break;
 547
 548     case OPT_fd_lines_as_code:
 549       gfc_option.flag_d_lines = 1;
 550       break;
 551
 552     case OPT_fd_lines_as_comments:
 553       gfc_option.flag_d_lines = 0;
 554       break;
 555
 556     case OPT_fdump_parse_tree:
 557       gfc_option.verbose = value;
 558       break;
 559
 560     case OPT_ffixed_form:
 561       gfc_option.source_form = FORM_FIXED;
 562       break;
 563
 564     case OPT_ffixed_line_length_none:
 565       gfc_option.fixed_line_length = 0;
 566       break;
 567
 568     case OPT_ffixed_line_length_:
 569       if (value != 0 && value < 7)
 570         gfc_fatal_error ("Fixed line length must be at least seven.");
 571       gfc_option.fixed_line_length = value;
 572       break;
 573
 574     case OPT_ffree_form:
 575       gfc_option.source_form = FORM_FREE;
 576       break;
 577
 578     case OPT_fopenmp:
 579       gfc_option.flag_openmp = value;
 580       break;
 581
 582     case OPT_ffree_line_length_none:
 583       gfc_option.free_line_length = 0;
 584       break;
 585
 586     case OPT_ffree_line_length_:
 587       if (value != 0 && value < 4)
 588         gfc_fatal_error ("Free line length must be at least three.");
 589       gfc_option.free_line_length = value;
 590       break;
 591
 592     case OPT_funderscoring:
 593       gfc_option.flag_underscoring = value;
 594       break;
 595
 596     case OPT_fsecond_underscore:
 597       gfc_option.flag_second_underscore = value;
 598       break;
 599
 600     case OPT_static_libgfortran:
 601 #ifndef HAVE_LD_STATIC_DYNAMIC
 602       gfc_fatal_error ("-static-libgfortran is not supported in this "
 603                        "configuration");
 604 #endif
 605       break;
 606
 607     case OPT_fimplicit_none:
 608       gfc_option.flag_implicit_none = value;
 609       break;
 610
 611     case OPT_fintrinsic_modules_path:
 612       gfc_add_include_path (arg, false);
 613       gfc_add_intrinsic_modules_path (arg);
 614       break;
 615
 616     case OPT_fmax_errors_:
 617       gfc_option.max_errors = value;
 618       break;
 619
 620     case OPT_fmax_stack_var_size_:
 621       gfc_option.flag_max_stack_var_size = value;
 622       break;
 623
 624     case OPT_fmodule_private:
 625       gfc_option.flag_module_private = value;
 626       break;
 627
 628     case OPT_frange_check:
 629       gfc_option.flag_range_check = value;
 630       break;
 631
 632     case OPT_fpack_derived:
 633       gfc_option.flag_pack_derived = value;
 634       break;
 635
 636     case OPT_frepack_arrays:
 637       gfc_option.flag_repack_arrays = value;
 638       break;
 639
 640     case OPT_fpreprocessed:
 641       gfc_option.flag_preprocessed = value;
 642       break;
 643
 644     case OPT_fmax_identifier_length_:
 645       if (value > GFC_MAX_SYMBOL_LEN)
 646         gfc_fatal_error ("Maximum supported identifier length is %d",
 647                          GFC_MAX_SYMBOL_LEN);
 648       gfc_option.max_identifier_length = value;
 649       break;
 650
 651     case OPT_fdefault_integer_8:
 652       gfc_option.flag_default_integer = value;
 653       break;
 654
 655     case OPT_fdefault_real_8:
 656       gfc_option.flag_default_real = value;
 657       break;
 658
 659     case OPT_fdefault_double_8:
 660       gfc_option.flag_default_double = value;
 661       break;
 662
 663     case OPT_finit_local_zero:
 664       gfc_option.flag_init_integer = GFC_INIT_INTEGER_ON;
 665       gfc_option.flag_init_integer_value = 0;
 666       gfc_option.flag_init_real = GFC_INIT_REAL_ZERO;
 667       gfc_option.flag_init_logical = GFC_INIT_LOGICAL_FALSE;
 668       gfc_option.flag_init_character = GFC_INIT_CHARACTER_ON;
 669       gfc_option.flag_init_character_value = (char)0;
 670       break;
 671
 672     case OPT_finit_logical_:
 673       if (!strcasecmp (arg, "false"))
 674         gfc_option.flag_init_logical = GFC_INIT_LOGICAL_FALSE;
 675       else if (!strcasecmp (arg, "true"))
 676         gfc_option.flag_init_logical = GFC_INIT_LOGICAL_TRUE;
 677       else
 678         gfc_fatal_error ("Unrecognized option to -finit-logical: %s",
 679                          arg);
 680       break;
 681
 682     case OPT_finit_real_:
 683       if (!strcasecmp (arg, "zero"))
 684         gfc_option.flag_init_real = GFC_INIT_REAL_ZERO;
 685       else if (!strcasecmp (arg, "nan"))
 686         gfc_option.flag_init_real = GFC_INIT_REAL_NAN;
 687       else if (!strcasecmp (arg, "inf"))
 688         gfc_option.flag_init_real = GFC_INIT_REAL_INF;
 689       else if (!strcasecmp (arg, "-inf"))
 690         gfc_option.flag_init_real = GFC_INIT_REAL_NEG_INF;
 691       else
 692         gfc_fatal_error ("Unrecognized option to -finit-real: %s",
 693                          arg);
 694       break;
 695
 696     case OPT_finit_integer_:
 697       gfc_option.flag_init_integer = GFC_INIT_INTEGER_ON;
 698       gfc_option.flag_init_integer_value = atoi (arg);
 699       break;
 700
 701     case OPT_finit_character_:
 702       if (value >= 0 && value <= 127)
 703         {
 704           gfc_option.flag_init_character = GFC_INIT_CHARACTER_ON;
 705           gfc_option.flag_init_character_value = (char)value;
 706         }
 707       else
 708         gfc_fatal_error ("The value of n in -finit-character=n must be "
 709                          "between 0 and 127");
 710       break;
 711
 712     case OPT_I:
 713       gfc_add_include_path (arg, true);
 714       break;
 715
 716     case OPT_J:
 717     case OPT_M:
 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_identifier_length = 31;
 733       gfc_option.warn_ampersand = 1;
 734       gfc_option.warn_tabs = 0;
 735       break;
 736
 737     case OPT_std_f2003:
 738       gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
 739         | GFC_STD_F2003 | GFC_STD_F95;
 740       gfc_option.warn_std = GFC_STD_F95_OBS;
 741       gfc_option.max_continue_fixed = 255;
 742       gfc_option.max_continue_free = 255;
 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_gnu:
 749       set_default_std_flags ();
 750       break;
 751
 752     case OPT_std_legacy:
 753       set_default_std_flags ();
 754       gfc_option.warn_std = 0;
 755       break;
 756
 757     case OPT_Wnonstd_intrinsics:
 758       gfc_option.warn_nonstd_intrinsics = value;
 759       break;
 760
 761     case OPT_fshort_enums:
 762       gfc_option.fshort_enums = 1;
 763       break;
 764
 765     case OPT_fconvert_little_endian:
 766       gfc_option.convert = GFC_CONVERT_LITTLE;
 767       break;
 768
 769     case OPT_fconvert_big_endian:
 770       gfc_option.convert = GFC_CONVERT_BIG;
 771       break;
 772
 773     case OPT_fconvert_native:
 774       gfc_option.convert = GFC_CONVERT_NATIVE;
 775       break;
 776
 777     case OPT_fconvert_swap:
 778       gfc_option.convert = GFC_CONVERT_SWAP;
 779       break;
 780
 781     case OPT_frecord_marker_4:
 782       gfc_option.record_marker = 4;
 783       break;
 784
 785     case OPT_frecord_marker_8:
 786       gfc_option.record_marker = 8;
 787       break;
 788
 789     case OPT_fmax_subrecord_length_:
 790       if (value > MAX_SUBRECORD_LENGTH)
 791         gfc_fatal_error ("Maximum subrecord length cannot exceed %d",
 792                          MAX_SUBRECORD_LENGTH);
 793
 794       gfc_option.max_subrecord_length = value;
 795       break;
 796
 797     case OPT_frecursive:
 798       gfc_option.flag_recursive = 1;
 799       break;
 800     }
 801
 802   return result;
 803 }