gcc/fortran/options.c

   1 /* Parse and display command line options.
   2    Copyright (C) 2000-2014 Free Software Foundation, Inc.
   3    Contributed by Andy Vaught
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 3, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 #include "config.h"
  22 #include "system.h"
  23 #include "coretypes.h"
  24 #include "tree.h"
  25 #include "flags.h"
  26 #include "intl.h"
  27 #include "opts.h"
  28 #include "toplev.h"  /* For save_decoded_options.  */
  29 #include "options.h"
  30 #include "params.h"
  31 #include "tree-inline.h"
  32 #include "gfortran.h"
  33 #include "target.h"
  34 #include "cpp.h"
  35 #include "diagnostic.h" /* For global_dc.  */
  36 #include "tm.h"
  37
  38 gfc_option_t gfc_option;
  39
  40
  41 /* Set flags that control warnings and errors for different
  42    Fortran standards to their default values.  Keep in sync with
  43    libgfortran/runtime/compile_options.c (init_compile_options).  */
  44
  45 static void
  46 set_default_std_flags (void)
  47 {
  48   gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
  49     | GFC_STD_F2003 | GFC_STD_F2008 | GFC_STD_F95 | GFC_STD_F77
  50     | GFC_STD_F2008_OBS | GFC_STD_F2008_TS | GFC_STD_GNU | GFC_STD_LEGACY;
  51   gfc_option.warn_std = GFC_STD_F95_DEL | GFC_STD_LEGACY;
  52 }
  53
  54
  55 /* Return language mask for Fortran options.  */
  56
  57 unsigned int
  58 gfc_option_lang_mask (void)
  59 {
  60   return CL_Fortran;
  61 }
  62
  63 /* Initialize options structure OPTS.  */
  64
  65 void
  66 gfc_init_options_struct (struct gcc_options *opts)
  67 {
  68   opts->x_flag_errno_math = 0;
  69   opts->frontend_set_flag_errno_math = true;
  70   opts->x_flag_associative_math = -1;
  71   opts->frontend_set_flag_associative_math = true;
  72 }
  73
  74 /* Get ready for options handling. Keep in sync with
  75    libgfortran/runtime/compile_options.c (init_compile_options).  */
  76
  77 void
  78 gfc_init_options (unsigned int decoded_options_count,
  79                   struct cl_decoded_option *decoded_options)
  80 {
  81   gfc_source_file = NULL;
  82   gfc_option.module_dir = NULL;
  83   gfc_option.source_form = FORM_UNKNOWN;
  84   gfc_option.fixed_line_length = 72;
  85   gfc_option.free_line_length = 132;
  86   gfc_option.max_continue_fixed = 255;
  87   gfc_option.max_continue_free = 255;
  88   gfc_option.max_identifier_length = GFC_MAX_SYMBOL_LEN;
  89   gfc_option.max_subrecord_length = 0;
  90   gfc_option.flag_max_array_constructor = 65535;
  91   gfc_option.convert = GFC_CONVERT_NATIVE;
  92   gfc_option.record_marker = 0;
  93   gfc_option.dump_fortran_original = 0;
  94   gfc_option.dump_fortran_optimized = 0;
  95
  96   gfc_option.max_errors = 25;
  97
  98   gfc_option.flag_all_intrinsics = 0;
  99   gfc_option.flag_default_double = 0;
 100   gfc_option.flag_default_integer = 0;
 101   gfc_option.flag_default_real = 0;
 102   gfc_option.flag_integer4_kind = 0;
 103   gfc_option.flag_real4_kind = 0;
 104   gfc_option.flag_real8_kind = 0;
 105   gfc_option.flag_dollar_ok = 0;
 106   gfc_option.flag_underscoring = 1;
 107   gfc_option.flag_f2c = 0;
 108   gfc_option.flag_second_underscore = -1;
 109   gfc_option.flag_implicit_none = 0;
 110
 111   /* Default value of flag_max_stack_var_size is set in gfc_post_options.  */
 112   gfc_option.flag_max_stack_var_size = -2;
 113   gfc_option.flag_stack_arrays = -1;
 114
 115   gfc_option.flag_range_check = 1;
 116   gfc_option.flag_pack_derived = 0;
 117   gfc_option.flag_repack_arrays = 0;
 118   gfc_option.flag_preprocessed = 0;
 119   gfc_option.flag_automatic = 1;
 120   gfc_option.flag_backslash = 0;
 121   gfc_option.flag_module_private = 0;
 122   gfc_option.flag_backtrace = 1;
 123   gfc_option.flag_allow_leading_underscore = 0;
 124   gfc_option.flag_external_blas = 0;
 125   gfc_option.blas_matmul_limit = 30;
 126   gfc_option.flag_cray_pointer = 0;
 127   gfc_option.flag_d_lines = -1;
 128   gfc_option.gfc_flag_openmp = 0;
 129   gfc_option.flag_sign_zero = 1;
 130   gfc_option.flag_recursive = 0;
 131   gfc_option.flag_init_integer = GFC_INIT_INTEGER_OFF;
 132   gfc_option.flag_init_integer_value = 0;
 133   gfc_option.flag_init_real = GFC_INIT_REAL_OFF;
 134   gfc_option.flag_init_logical = GFC_INIT_LOGICAL_OFF;
 135   gfc_option.flag_init_character = GFC_INIT_CHARACTER_OFF;
 136   gfc_option.flag_init_character_value = (char)0;
 137   gfc_option.flag_align_commons = 1;
 138   gfc_option.flag_protect_parens = -1;
 139   gfc_option.flag_realloc_lhs = -1;
 140   gfc_option.flag_aggressive_function_elimination = 0;
 141   gfc_option.flag_frontend_optimize = -1;
 142
 143   gfc_option.fpe = 0;
 144   /* All except GFC_FPE_INEXACT.  */
 145   gfc_option.fpe_summary = GFC_FPE_INVALID | GFC_FPE_DENORMAL
 146                            | GFC_FPE_ZERO | GFC_FPE_OVERFLOW
 147                            | GFC_FPE_UNDERFLOW;
 148   gfc_option.rtcheck = 0;
 149   gfc_option.coarray = GFC_FCOARRAY_NONE;
 150
 151   /* ??? Wmissing-include-dirs is disabled by default in C/C++ but
 152      enabled by default in Fortran.  Ideally, we should express this
 153      in .opt, but that is not supported yet.  */
 154   if (!global_options_set.x_cpp_warn_missing_include_dirs)
 155     global_options.x_cpp_warn_missing_include_dirs = 1;;
 156
 157   set_default_std_flags ();
 158
 159   /* Initialize cpp-related options.  */
 160   gfc_cpp_init_options (decoded_options_count, decoded_options);
 161   gfc_diagnostics_init ();
 162 }
 163
 164
 165 /* Determine the source form from the filename extension.  We assume
 166    case insensitivity.  */
 167
 168 static gfc_source_form
 169 form_from_filename (const char *filename)
 170 {
 171   static const struct
 172   {
 173     const char *extension;
 174     gfc_source_form form;
 175   }
 176   exttype[] =
 177   {
 178     {
 179     ".f90", FORM_FREE}
 180     ,
 181     {
 182     ".f95", FORM_FREE}
 183     ,
 184     {
 185     ".f03", FORM_FREE}
 186     ,
 187     {
 188     ".f08", FORM_FREE}
 189     ,
 190     {
 191     ".f", FORM_FIXED}
 192     ,
 193     {
 194     ".for", FORM_FIXED}
 195     ,
 196     {
 197     ".ftn", FORM_FIXED}
 198     ,
 199     {
 200     "", FORM_UNKNOWN}
 201   };            /* sentinel value */
 202
 203   gfc_source_form f_form;
 204   const char *fileext;
 205   int i;
 206
 207   /* Find end of file name.  Note, filename is either a NULL pointer or
 208      a NUL terminated string.  */
 209   i = 0;
 210   while (filename[i] != '\0')
 211     i++;
 212
 213   /* Find last period.  */
 214   while (i >= 0 && (filename[i] != '.'))
 215     i--;
 216
 217   /* Did we see a file extension?  */
 218   if (i < 0)
 219     return FORM_UNKNOWN; /* Nope  */
 220
 221   /* Get file extension and compare it to others.  */
 222   fileext = &(filename[i]);
 223
 224   i = -1;
 225   f_form = FORM_UNKNOWN;
 226   do
 227     {
 228       i++;
 229       if (strcasecmp (fileext, exttype[i].extension) == 0)
 230         {
 231           f_form = exttype[i].form;
 232           break;
 233         }
 234     }
 235   while (exttype[i].form != FORM_UNKNOWN);
 236
 237   return f_form;
 238 }
 239
 240
 241 /* Finalize commandline options.  */
 242
 243 bool
 244 gfc_post_options (const char **pfilename)
 245 {
 246   const char *filename = *pfilename, *canon_source_file = NULL;
 247   char *source_path;
 248   int i;
 249
 250   /* Excess precision other than "fast" requires front-end
 251      support.  */
 252   if (flag_excess_precision_cmdline == EXCESS_PRECISION_STANDARD
 253       && TARGET_FLT_EVAL_METHOD_NON_DEFAULT)
 254     sorry ("-fexcess-precision=standard for Fortran");
 255   flag_excess_precision_cmdline = EXCESS_PRECISION_FAST;
 256
 257   /* Fortran allows associative math - but we cannot reassociate if
 258      we want traps or signed zeros. Cf. also flag_protect_parens.  */
 259   if (flag_associative_math == -1)
 260     flag_associative_math = (!flag_trapping_math && !flag_signed_zeros);
 261
 262   if (gfc_option.flag_protect_parens == -1)
 263     gfc_option.flag_protect_parens = !optimize_fast;
 264
 265   if (gfc_option.flag_stack_arrays == -1)
 266     gfc_option.flag_stack_arrays = optimize_fast;
 267
 268   /* By default, disable (re)allocation during assignment for -std=f95,
 269      and enable it for F2003/F2008/GNU/Legacy.  */
 270   if (gfc_option.flag_realloc_lhs == -1)
 271     {
 272       if (gfc_option.allow_std & GFC_STD_F2003)
 273         gfc_option.flag_realloc_lhs = 1;
 274       else
 275         gfc_option.flag_realloc_lhs = 0;
 276     }
 277
 278   /* -fbounds-check is equivalent to -fcheck=bounds */
 279   if (flag_bounds_check)
 280     gfc_option.rtcheck |= GFC_RTCHECK_BOUNDS;
 281
 282   if (flag_compare_debug)
 283     gfc_option.dump_fortran_original = 0;
 284
 285   /* Make -fmax-errors visible to gfortran's diagnostic machinery.  */
 286   if (global_options_set.x_flag_max_errors)
 287     gfc_option.max_errors = flag_max_errors;
 288
 289   /* Verify the input file name.  */
 290   if (!filename || strcmp (filename, "-") == 0)
 291     {
 292       filename = "";
 293     }
 294
 295   if (gfc_option.flag_preprocessed)
 296     {
 297       /* For preprocessed files, if the first tokens are of the form # NUM.
 298          handle the directives so we know the original file name.  */
 299       gfc_source_file = gfc_read_orig_filename (filename, &canon_source_file);
 300       if (gfc_source_file == NULL)
 301         gfc_source_file = filename;
 302       else
 303         *pfilename = gfc_source_file;
 304     }
 305   else
 306     gfc_source_file = filename;
 307
 308   if (canon_source_file == NULL)
 309     canon_source_file = gfc_source_file;
 310
 311   /* Adds the path where the source file is to the list of include files.  */
 312
 313   i = strlen (canon_source_file);
 314   while (i > 0 && !IS_DIR_SEPARATOR (canon_source_file[i]))
 315     i--;
 316
 317   if (i != 0)
 318     {
 319       source_path = (char *) alloca (i + 1);
 320       memcpy (source_path, canon_source_file, i);
 321       source_path[i] = 0;
 322       gfc_add_include_path (source_path, true, true, true);
 323     }
 324   else
 325     gfc_add_include_path (".", true, true, true);
 326
 327   if (canon_source_file != gfc_source_file)
 328     free (CONST_CAST (char *, canon_source_file));
 329
 330   /* Decide which form the file will be read in as.  */
 331
 332   if (gfc_option.source_form != FORM_UNKNOWN)
 333     gfc_current_form = gfc_option.source_form;
 334   else
 335     {
 336       gfc_current_form = form_from_filename (filename);
 337
 338       if (gfc_current_form == FORM_UNKNOWN)
 339         {
 340           gfc_current_form = FORM_FREE;
 341           gfc_warning_now ("Reading file %qs as free form",
 342                            (filename[0] == '\0') ? "<stdin>" : filename);
 343         }
 344     }
 345
 346   /* If the user specified -fd-lines-as-{code|comments} verify that we're
 347      in fixed form.  */
 348   if (gfc_current_form == FORM_FREE)
 349     {
 350       if (gfc_option.flag_d_lines == 0)
 351         gfc_warning_now ("%<-fd-lines-as-comments%> has no effect "
 352                            "in free form");
 353       else if (gfc_option.flag_d_lines == 1)
 354         gfc_warning_now ("%<-fd-lines-as-code%> has no effect in free form");
 355     }
 356
 357   /* If -pedantic, warn about the use of GNU extensions.  */
 358   if (pedantic && (gfc_option.allow_std & GFC_STD_GNU) != 0)
 359     gfc_option.warn_std |= GFC_STD_GNU;
 360   /* -std=legacy -pedantic is effectively -std=gnu.  */
 361   if (pedantic && (gfc_option.allow_std & GFC_STD_LEGACY) != 0)
 362     gfc_option.warn_std |= GFC_STD_F95_OBS | GFC_STD_F95_DEL | GFC_STD_LEGACY;
 363
 364   /* If the user didn't explicitly specify -f(no)-second-underscore we
 365      use it if we're trying to be compatible with f2c, and not
 366      otherwise.  */
 367   if (gfc_option.flag_second_underscore == -1)
 368     gfc_option.flag_second_underscore = gfc_option.flag_f2c;
 369
 370   if (!gfc_option.flag_automatic && gfc_option.flag_max_stack_var_size != -2
 371       && gfc_option.flag_max_stack_var_size != 0)
 372     gfc_warning_now ("Flag %<-fno-automatic%> overwrites %<-fmax-stack-var-size=%d%>",
 373                        gfc_option.flag_max_stack_var_size);
 374   else if (!gfc_option.flag_automatic && gfc_option.flag_recursive)
 375     gfc_warning_now ("Flag %<-fno-automatic%> overwrites %<-frecursive%>");
 376   else if (!gfc_option.flag_automatic && gfc_option.gfc_flag_openmp)
 377     gfc_warning_now ("Flag %<-fno-automatic%> overwrites %<-frecursive%> implied by "
 378                        "%<-fopenmp%>");
 379   else if (gfc_option.flag_max_stack_var_size != -2
 380            && gfc_option.flag_recursive)
 381     gfc_warning_now ("Flag %<-frecursive%> overwrites %<-fmax-stack-var-size=%d%>",
 382                        gfc_option.flag_max_stack_var_size);
 383   else if (gfc_option.flag_max_stack_var_size != -2
 384            && gfc_option.gfc_flag_openmp)
 385     gfc_warning_now ("Flag %<-fmax-stack-var-size=%d%> overwrites %<-frecursive%> "
 386                        "implied by %<-fopenmp%>",
 387                      gfc_option.flag_max_stack_var_size);
 388
 389   /* Implement -frecursive as -fmax-stack-var-size=-1.  */
 390   if (gfc_option.flag_recursive)
 391     gfc_option.flag_max_stack_var_size = -1;
 392
 393   /* Implied -frecursive; implemented as -fmax-stack-var-size=-1.  */
 394   if (gfc_option.flag_max_stack_var_size == -2 && gfc_option.gfc_flag_openmp
 395       && gfc_option.flag_automatic)
 396     {
 397       gfc_option.flag_recursive = 1;
 398       gfc_option.flag_max_stack_var_size = -1;
 399     }
 400
 401   /* Set default.  */
 402   if (gfc_option.flag_max_stack_var_size == -2)
 403     gfc_option.flag_max_stack_var_size = 32768;
 404
 405   /* Implement -fno-automatic as -fmax-stack-var-size=0.  */
 406   if (!gfc_option.flag_automatic)
 407     gfc_option.flag_max_stack_var_size = 0;
 408
 409   /* Optimization implies front end optimization, unless the user
 410      specified it directly.  */
 411
 412   if (gfc_option.flag_frontend_optimize == -1)
 413     gfc_option.flag_frontend_optimize = optimize;
 414
 415   gfc_cpp_post_options ();
 416
 417   return gfc_cpp_preprocess_only ();
 418 }
 419
 420
 421 static void
 422 gfc_handle_module_path_options (const char *arg)
 423 {
 424
 425   if (gfc_option.module_dir != NULL)
 426     gfc_fatal_error ("gfortran: Only one %<-J%> option allowed");
 427
 428   gfc_option.module_dir = XCNEWVEC (char, strlen (arg) + 2);
 429   strcpy (gfc_option.module_dir, arg);
 430
 431   gfc_add_include_path (gfc_option.module_dir, true, false, true);
 432
 433   strcat (gfc_option.module_dir, "/");
 434 }
 435
 436
 437 /* Handle options -ffpe-trap= and -ffpe-summary=.  */
 438
 439 static void
 440 gfc_handle_fpe_option (const char *arg, bool trap)
 441 {
 442   int result, pos = 0, n;
 443   /* precision is a backwards compatibility alias for inexact.  */
 444   static const char * const exception[] = { "invalid", "denormal", "zero",
 445                                             "overflow", "underflow",
 446                                             "inexact", "precision", NULL };
 447   static const int opt_exception[] = { GFC_FPE_INVALID, GFC_FPE_DENORMAL,
 448                                        GFC_FPE_ZERO, GFC_FPE_OVERFLOW,
 449                                        GFC_FPE_UNDERFLOW, GFC_FPE_INEXACT,
 450                                        GFC_FPE_INEXACT,
 451                                        0 };
 452
 453   /* As the default for -ffpe-summary= is nonzero, set it to 0.  */
 454   if (!trap)
 455     gfc_option.fpe_summary = 0;
 456
 457   while (*arg)
 458     {
 459       while (*arg == ',')
 460         arg++;
 461
 462       while (arg[pos] && arg[pos] != ',')
 463         pos++;
 464
 465       result = 0;
 466       if (!trap && strncmp ("none", arg, pos) == 0)
 467         {
 468           gfc_option.fpe_summary = 0;
 469           arg += pos;
 470           pos = 0;
 471           continue;
 472         }
 473       else if (!trap && strncmp ("all", arg, pos) == 0)
 474         {
 475           gfc_option.fpe_summary = GFC_FPE_INVALID | GFC_FPE_DENORMAL
 476                                    | GFC_FPE_ZERO | GFC_FPE_OVERFLOW
 477                                    | GFC_FPE_UNDERFLOW | GFC_FPE_INEXACT;
 478           arg += pos;
 479           pos = 0;
 480           continue;
 481         }
 482       else
 483         for (n = 0; exception[n] != NULL; n++)
 484           {
 485           if (exception[n] && strncmp (exception[n], arg, pos) == 0)
 486             {
 487               if (trap)
 488                 gfc_option.fpe |= opt_exception[n];
 489               else
 490                 gfc_option.fpe_summary |= opt_exception[n];
 491               arg += pos;
 492               pos = 0;
 493               result = 1;
 494               break;
 495             }
 496           }
 497       if (!result && !trap)
 498         gfc_fatal_error ("Argument to %<-ffpe-trap%> is not valid: %s", arg);
 499       else if (!result)
 500         gfc_fatal_error ("Argument to %<-ffpe-summary%> is not valid: %s", arg);
 501
 502     }
 503 }
 504
 505
 506 static void
 507 gfc_handle_coarray_option (const char *arg)
 508 {
 509   if (strcmp (arg, "none") == 0)
 510     gfc_option.coarray = GFC_FCOARRAY_NONE;
 511   else if (strcmp (arg, "single") == 0)
 512     gfc_option.coarray = GFC_FCOARRAY_SINGLE;
 513   else if (strcmp (arg, "lib") == 0)
 514     gfc_option.coarray = GFC_FCOARRAY_LIB;
 515   else
 516     gfc_fatal_error ("Argument to %<-fcoarray%> is not valid: %s", arg);
 517 }
 518
 519
 520 static void
 521 gfc_handle_runtime_check_option (const char *arg)
 522 {
 523   int result, pos = 0, n;
 524   static const char * const optname[] = { "all", "bounds", "array-temps",
 525                                           "recursion", "do", "pointer",
 526                                           "mem", NULL };
 527   static const int optmask[] = { GFC_RTCHECK_ALL, GFC_RTCHECK_BOUNDS,
 528                                  GFC_RTCHECK_ARRAY_TEMPS,
 529                                  GFC_RTCHECK_RECURSION, GFC_RTCHECK_DO,
 530                                  GFC_RTCHECK_POINTER, GFC_RTCHECK_MEM,
 531                                  0 };
 532
 533   while (*arg)
 534     {
 535       while (*arg == ',')
 536         arg++;
 537
 538       while (arg[pos] && arg[pos] != ',')
 539         pos++;
 540
 541       result = 0;
 542       for (n = 0; optname[n] != NULL; n++)
 543         {
 544           if (optname[n] && strncmp (optname[n], arg, pos) == 0)
 545             {
 546               gfc_option.rtcheck |= optmask[n];
 547               arg += pos;
 548               pos = 0;
 549               result = 1;
 550               break;
 551             }
 552         }
 553       if (!result)
 554         gfc_fatal_error ("Argument to %<-fcheck%> is not valid: %s", arg);
 555     }
 556 }
 557
 558
 559 /* Handle command-line options.  Returns 0 if unrecognized, 1 if
 560    recognized and handled.  */
 561
 562 bool
 563 gfc_handle_option (size_t scode, const char *arg, int value,
 564                    int kind ATTRIBUTE_UNUSED, location_t loc ATTRIBUTE_UNUSED,
 565                    const struct cl_option_handlers *handlers ATTRIBUTE_UNUSED)
 566 {
 567   bool result = true;
 568   enum opt_code code = (enum opt_code) scode;
 569
 570   if (gfc_cpp_handle_option (scode, arg, value) == 1)
 571     return true;
 572
 573   switch (code)
 574     {
 575     default:
 576       if (cl_options[code].flags & gfc_option_lang_mask ())
 577         break;
 578       result = false;
 579       break;
 580
 581     case OPT_fall_intrinsics:
 582       gfc_option.flag_all_intrinsics = 1;
 583       break;
 584
 585     case OPT_fautomatic:
 586       gfc_option.flag_automatic = value;
 587       break;
 588
 589     case OPT_fallow_leading_underscore:
 590       gfc_option.flag_allow_leading_underscore = value;
 591       break;
 592
 593     case OPT_fbackslash:
 594       gfc_option.flag_backslash = value;
 595       break;
 596
 597     case OPT_fbacktrace:
 598       gfc_option.flag_backtrace = value;
 599       break;
 600
 601     case OPT_fcheck_array_temporaries:
 602       gfc_option.rtcheck |= GFC_RTCHECK_ARRAY_TEMPS;
 603       break;
 604
 605     case OPT_fcray_pointer:
 606       gfc_option.flag_cray_pointer = value;
 607       break;
 608
 609     case OPT_ff2c:
 610       gfc_option.flag_f2c = value;
 611       break;
 612
 613     case OPT_fdollar_ok:
 614       gfc_option.flag_dollar_ok = value;
 615       break;
 616
 617     case OPT_fexternal_blas:
 618       gfc_option.flag_external_blas = value;
 619       break;
 620
 621     case OPT_fblas_matmul_limit_:
 622       gfc_option.blas_matmul_limit = value;
 623       break;
 624
 625     case OPT_fd_lines_as_code:
 626       gfc_option.flag_d_lines = 1;
 627       break;
 628
 629     case OPT_fd_lines_as_comments:
 630       gfc_option.flag_d_lines = 0;
 631       break;
 632
 633     case OPT_fdump_fortran_original:
 634     case OPT_fdump_parse_tree:
 635       gfc_option.dump_fortran_original = value;
 636       break;
 637
 638     case OPT_fdump_fortran_optimized:
 639       gfc_option.dump_fortran_optimized = value;
 640       break;
 641
 642     case OPT_ffixed_form:
 643       gfc_option.source_form = FORM_FIXED;
 644       break;
 645
 646     case OPT_ffixed_line_length_none:
 647       gfc_option.fixed_line_length = 0;
 648       break;
 649
 650     case OPT_ffixed_line_length_:
 651       if (value != 0 && value < 7)
 652         gfc_fatal_error ("Fixed line length must be at least seven");
 653       gfc_option.fixed_line_length = value;
 654       break;
 655
 656     case OPT_ffree_form:
 657       gfc_option.source_form = FORM_FREE;
 658       break;
 659
 660     case OPT_fopenmp:
 661       gfc_option.gfc_flag_openmp = value;
 662       break;
 663
 664     case OPT_fopenmp_simd:
 665       gfc_option.gfc_flag_openmp_simd = value;
 666       break;
 667
 668     case OPT_ffree_line_length_none:
 669       gfc_option.free_line_length = 0;
 670       break;
 671
 672     case OPT_ffree_line_length_:
 673       if (value != 0 && value < 4)
 674         gfc_fatal_error ("Free line length must be at least three");
 675       gfc_option.free_line_length = value;
 676       break;
 677
 678     case OPT_funderscoring:
 679       gfc_option.flag_underscoring = value;
 680       break;
 681
 682     case OPT_fsecond_underscore:
 683       gfc_option.flag_second_underscore = value;
 684       break;
 685
 686     case OPT_static_libgfortran:
 687 #ifndef HAVE_LD_STATIC_DYNAMIC
 688       gfc_fatal_error ("%<-static-libgfortran%> is not supported in this "
 689                        "configuration");
 690 #endif
 691       break;
 692
 693     case OPT_fimplicit_none:
 694       gfc_option.flag_implicit_none = value;
 695       break;
 696
 697     case OPT_fintrinsic_modules_path:
 698     case OPT_fintrinsic_modules_path_:
 699
 700       /* This is needed because omp_lib.h is in a directory together
 701          with intrinsic modules.  Do no warn because during testing
 702          without an installed compiler, we would get lots of bogus
 703          warnings for a missing include directory.  */
 704       gfc_add_include_path (arg, false, false, false);
 705
 706       gfc_add_intrinsic_modules_path (arg);
 707       break;
 708
 709     case OPT_fmax_array_constructor_:
 710       gfc_option.flag_max_array_constructor = value > 65535 ? value : 65535;
 711       break;
 712
 713     case OPT_fmax_stack_var_size_:
 714       gfc_option.flag_max_stack_var_size = value;
 715       break;
 716
 717     case OPT_fstack_arrays:
 718       gfc_option.flag_stack_arrays = value;
 719       break;
 720
 721     case OPT_fmodule_private:
 722       gfc_option.flag_module_private = value;
 723       break;
 724
 725     case OPT_frange_check:
 726       gfc_option.flag_range_check = value;
 727       break;
 728
 729     case OPT_fpack_derived:
 730       gfc_option.flag_pack_derived = value;
 731       break;
 732
 733     case OPT_frepack_arrays:
 734       gfc_option.flag_repack_arrays = value;
 735       break;
 736
 737     case OPT_fpreprocessed:
 738       gfc_option.flag_preprocessed = value;
 739       break;
 740
 741     case OPT_fmax_identifier_length_:
 742       if (value > GFC_MAX_SYMBOL_LEN)
 743         gfc_fatal_error ("Maximum supported identifier length is %d",
 744                          GFC_MAX_SYMBOL_LEN);
 745       gfc_option.max_identifier_length = value;
 746       break;
 747
 748     case OPT_fdefault_integer_8:
 749       gfc_option.flag_default_integer = value;
 750       break;
 751
 752     case OPT_fdefault_real_8:
 753       gfc_option.flag_default_real = value;
 754       break;
 755
 756     case OPT_fdefault_double_8:
 757       gfc_option.flag_default_double = value;
 758       break;
 759
 760     case OPT_finteger_4_integer_8:
 761       gfc_option.flag_integer4_kind = 8;
 762       break;
 763
 764     case OPT_freal_4_real_8:
 765       gfc_option.flag_real4_kind = 8;
 766       break;
 767
 768     case OPT_freal_4_real_10:
 769       gfc_option.flag_real4_kind = 10;
 770       break;
 771
 772     case OPT_freal_4_real_16:
 773       gfc_option.flag_real4_kind = 16;
 774       break;
 775
 776     case OPT_freal_8_real_4:
 777       gfc_option.flag_real8_kind = 4;
 778       break;
 779
 780     case OPT_freal_8_real_10:
 781       gfc_option.flag_real8_kind = 10;
 782       break;
 783
 784     case OPT_freal_8_real_16:
 785       gfc_option.flag_real8_kind = 16;
 786       break;
 787
 788     case OPT_finit_local_zero:
 789       gfc_option.flag_init_integer = GFC_INIT_INTEGER_ON;
 790       gfc_option.flag_init_integer_value = 0;
 791       gfc_option.flag_init_real = GFC_INIT_REAL_ZERO;
 792       gfc_option.flag_init_logical = GFC_INIT_LOGICAL_FALSE;
 793       gfc_option.flag_init_character = GFC_INIT_CHARACTER_ON;
 794       gfc_option.flag_init_character_value = (char)0;
 795       break;
 796
 797     case OPT_finit_logical_:
 798       if (!strcasecmp (arg, "false"))
 799         gfc_option.flag_init_logical = GFC_INIT_LOGICAL_FALSE;
 800       else if (!strcasecmp (arg, "true"))
 801         gfc_option.flag_init_logical = GFC_INIT_LOGICAL_TRUE;
 802       else
 803         gfc_fatal_error ("Unrecognized option to %<-finit-logical%>: %s",
 804                          arg);
 805       break;
 806
 807     case OPT_finit_real_:
 808       if (!strcasecmp (arg, "zero"))
 809         gfc_option.flag_init_real = GFC_INIT_REAL_ZERO;
 810       else if (!strcasecmp (arg, "nan"))
 811         gfc_option.flag_init_real = GFC_INIT_REAL_NAN;
 812       else if (!strcasecmp (arg, "snan"))
 813         gfc_option.flag_init_real = GFC_INIT_REAL_SNAN;
 814       else if (!strcasecmp (arg, "inf"))
 815         gfc_option.flag_init_real = GFC_INIT_REAL_INF;
 816       else if (!strcasecmp (arg, "-inf"))
 817         gfc_option.flag_init_real = GFC_INIT_REAL_NEG_INF;
 818       else
 819         gfc_fatal_error ("Unrecognized option to %<-finit-real%>: %s",
 820                          arg);
 821       break;
 822
 823     case OPT_finit_integer_:
 824       gfc_option.flag_init_integer = GFC_INIT_INTEGER_ON;
 825       gfc_option.flag_init_integer_value = atoi (arg);
 826       break;
 827
 828     case OPT_finit_character_:
 829       if (value >= 0 && value <= 127)
 830         {
 831           gfc_option.flag_init_character = GFC_INIT_CHARACTER_ON;
 832           gfc_option.flag_init_character_value = (char)value;
 833         }
 834       else
 835         gfc_fatal_error ("The value of n in %<-finit-character=n%> must be "
 836                          "between 0 and 127");
 837       break;
 838
 839     case OPT_I:
 840       gfc_add_include_path (arg, true, false, true);
 841       break;
 842
 843     case OPT_J:
 844       gfc_handle_module_path_options (arg);
 845       break;
 846
 847     case OPT_fsign_zero:
 848       gfc_option.flag_sign_zero = value;
 849       break;
 850
 851     case OPT_ffpe_trap_:
 852       gfc_handle_fpe_option (arg, true);
 853       break;
 854
 855     case OPT_ffpe_summary_:
 856       gfc_handle_fpe_option (arg, false);
 857       break;
 858
 859     case OPT_std_f95:
 860       gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95 | GFC_STD_F77
 861                              | GFC_STD_F2008_OBS;
 862       gfc_option.warn_std = GFC_STD_F95_OBS;
 863       gfc_option.max_continue_fixed = 19;
 864       gfc_option.max_continue_free = 39;
 865       gfc_option.max_identifier_length = 31;
 866       warn_ampersand = 1;
 867       warn_tabs = 1;
 868       break;
 869
 870     case OPT_std_f2003:
 871       gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
 872         | GFC_STD_F2003 | GFC_STD_F95 | GFC_STD_F2008_OBS;
 873       gfc_option.warn_std = GFC_STD_F95_OBS;
 874       gfc_option.max_identifier_length = 63;
 875       warn_ampersand = 1;
 876       warn_tabs = 1;
 877       break;
 878
 879     case OPT_std_f2008:
 880       gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
 881         | GFC_STD_F2003 | GFC_STD_F95 | GFC_STD_F2008 | GFC_STD_F2008_OBS;
 882       gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F2008_OBS;
 883       gfc_option.max_identifier_length = 63;
 884       warn_ampersand = 1;
 885       warn_tabs = 1;
 886       break;
 887
 888     case OPT_std_f2008ts:
 889       gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
 890         | GFC_STD_F2003 | GFC_STD_F95 | GFC_STD_F2008 | GFC_STD_F2008_OBS
 891         | GFC_STD_F2008_TS;
 892       gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F2008_OBS;
 893       gfc_option.max_identifier_length = 63;
 894       warn_ampersand = 1;
 895       warn_tabs = 1;
 896       break;
 897
 898     case OPT_std_gnu:
 899       set_default_std_flags ();
 900       break;
 901
 902     case OPT_std_legacy:
 903       set_default_std_flags ();
 904       gfc_option.warn_std = 0;
 905       break;
 906
 907     case OPT_fshort_enums:
 908       /* Handled in language-independent code.  */
 909       break;
 910
 911     case OPT_fconvert_little_endian:
 912       gfc_option.convert = GFC_CONVERT_LITTLE;
 913       break;
 914
 915     case OPT_fconvert_big_endian:
 916       gfc_option.convert = GFC_CONVERT_BIG;
 917       break;
 918
 919     case OPT_fconvert_native:
 920       gfc_option.convert = GFC_CONVERT_NATIVE;
 921       break;
 922
 923     case OPT_fconvert_swap:
 924       gfc_option.convert = GFC_CONVERT_SWAP;
 925       break;
 926
 927     case OPT_frecord_marker_4:
 928       gfc_option.record_marker = 4;
 929       break;
 930
 931     case OPT_frecord_marker_8:
 932       gfc_option.record_marker = 8;
 933       break;
 934
 935     case OPT_fmax_subrecord_length_:
 936       if (value > MAX_SUBRECORD_LENGTH)
 937         gfc_fatal_error ("Maximum subrecord length cannot exceed %d",
 938                          MAX_SUBRECORD_LENGTH);
 939
 940       gfc_option.max_subrecord_length = value;
 941       break;
 942
 943     case OPT_frecursive:
 944       gfc_option.flag_recursive = value;
 945       break;
 946
 947     case OPT_falign_commons:
 948       gfc_option.flag_align_commons = value;
 949       break;
 950
 951     case  OPT_faggressive_function_elimination:
 952       gfc_option.flag_aggressive_function_elimination = value;
 953       break;
 954
 955     case OPT_ffrontend_optimize:
 956       gfc_option.flag_frontend_optimize = value;
 957       break;
 958
 959     case OPT_fprotect_parens:
 960       gfc_option.flag_protect_parens = value;
 961       break;
 962
 963     case OPT_frealloc_lhs:
 964       gfc_option.flag_realloc_lhs = value;
 965       break;
 966
 967     case OPT_fcheck_:
 968       gfc_handle_runtime_check_option (arg);
 969       break;
 970
 971     case OPT_fcoarray_:
 972       gfc_handle_coarray_option (arg);
 973       break;
 974     }
 975
 976   Fortran_handle_option_auto (&global_options, &global_options_set,
 977                               scode, arg, value,
 978                               gfc_option_lang_mask (), kind,
 979                               loc, handlers, global_dc);
 980   return result;
 981 }
 982
 983
 984 /* Return a string with the options passed to the compiler; used for
 985    Fortran's compiler_options() intrinsic.  */
 986
 987 char *
 988 gfc_get_option_string (void)
 989 {
 990   unsigned j;
 991   size_t len, pos;
 992   char *result;
 993
 994   /* Allocate and return a one-character string with '\0'.  */
 995   if (!save_decoded_options_count)
 996     return XCNEWVEC (char, 1);
 997
 998   /* Determine required string length.  */
 999
1000   len = 0;
1001   for (j = 1; j < save_decoded_options_count; j++)
1002     {
1003       switch (save_decoded_options[j].opt_index)
1004         {
1005         case OPT_o:
1006         case OPT_d:
1007         case OPT_dumpbase:
1008         case OPT_dumpdir:
1009         case OPT_auxbase:
1010         case OPT_quiet:
1011         case OPT_version:
1012         case OPT_fintrinsic_modules_path:
1013         case OPT_fintrinsic_modules_path_:
1014           /* Ignore these.  */
1015           break;
1016         default:
1017           /* Ignore file names.  */
1018           if (save_decoded_options[j].orig_option_with_args_text[0] == '-')
1019             len += 1
1020                  + strlen (save_decoded_options[j].orig_option_with_args_text);
1021         }
1022     }
1023
1024   result = XCNEWVEC (char, len);
1025
1026   pos = 0;
1027   for (j = 1; j < save_decoded_options_count; j++)
1028     {
1029       switch (save_decoded_options[j].opt_index)
1030         {
1031         case OPT_o:
1032         case OPT_d:
1033         case OPT_dumpbase:
1034         case OPT_dumpdir:
1035         case OPT_auxbase:
1036         case OPT_quiet:
1037         case OPT_version:
1038         case OPT_fintrinsic_modules_path:
1039         case OPT_fintrinsic_modules_path_:
1040           /* Ignore these.  */
1041           continue;
1042
1043         case OPT_cpp_:
1044           /* Use "-cpp" rather than "-cpp=<temporary file>".  */
1045           len = 4;
1046           break;
1047
1048         default:
1049           /* Ignore file names.  */
1050           if (save_decoded_options[j].orig_option_with_args_text[0] != '-')
1051             continue;
1052
1053           len = strlen (save_decoded_options[j].orig_option_with_args_text);
1054         }
1055
1056       memcpy (&result[pos], save_decoded_options[j].orig_option_with_args_text, len);
1057       pos += len;
1058       result[pos++] = ' ';
1059     }
1060
1061   result[--pos] = '\0';
1062   return result;
1063 }