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.warn_aliasing = 0;
  97   gfc_option.warn_ampersand = 0;
  98   gfc_option.warn_array_temp = 0;
  99   gfc_option.warn_c_binding_type = 0;
 100   gfc_option.gfc_warn_conversion = 0;
 101   gfc_option.warn_conversion_extra = 0;
 102   gfc_option.warn_function_elimination = 0;
 103   gfc_option.warn_implicit_interface = 0;
 104   gfc_option.warn_line_truncation = 0;
 105   gfc_option.warn_surprising = 0;
 106   gfc_option.warn_underflow = 1;
 107   gfc_option.warn_intrinsic_shadow = 0;
 108   gfc_option.warn_intrinsics_std = 0;
 109   gfc_option.warn_align_commons = 1;
 110   gfc_option.warn_real_q_constant = 0;
 111   gfc_option.warn_unused_dummy_argument = 0;
 112   gfc_option.warn_zerotrip = 0;
 113   gfc_option.warn_realloc_lhs = 0;
 114   gfc_option.warn_realloc_lhs_all = 0;
 115   gfc_option.warn_compare_reals = 0;
 116   gfc_option.warn_target_lifetime = 0;
 117   gfc_option.max_errors = 25;
 118
 119   gfc_option.flag_all_intrinsics = 0;
 120   gfc_option.flag_default_double = 0;
 121   gfc_option.flag_default_integer = 0;
 122   gfc_option.flag_default_real = 0;
 123   gfc_option.flag_integer4_kind = 0;
 124   gfc_option.flag_real4_kind = 0;
 125   gfc_option.flag_real8_kind = 0;
 126   gfc_option.flag_dollar_ok = 0;
 127   gfc_option.flag_underscoring = 1;
 128   gfc_option.flag_f2c = 0;
 129   gfc_option.flag_second_underscore = -1;
 130   gfc_option.flag_implicit_none = 0;
 131
 132   /* Default value of flag_max_stack_var_size is set in gfc_post_options.  */
 133   gfc_option.flag_max_stack_var_size = -2;
 134   gfc_option.flag_stack_arrays = -1;
 135
 136   gfc_option.flag_range_check = 1;
 137   gfc_option.flag_pack_derived = 0;
 138   gfc_option.flag_repack_arrays = 0;
 139   gfc_option.flag_preprocessed = 0;
 140   gfc_option.flag_automatic = 1;
 141   gfc_option.flag_backslash = 0;
 142   gfc_option.flag_module_private = 0;
 143   gfc_option.flag_backtrace = 1;
 144   gfc_option.flag_allow_leading_underscore = 0;
 145   gfc_option.flag_external_blas = 0;
 146   gfc_option.blas_matmul_limit = 30;
 147   gfc_option.flag_cray_pointer = 0;
 148   gfc_option.flag_d_lines = -1;
 149   gfc_option.gfc_flag_openmp = 0;
 150   gfc_option.flag_sign_zero = 1;
 151   gfc_option.flag_recursive = 0;
 152   gfc_option.flag_init_integer = GFC_INIT_INTEGER_OFF;
 153   gfc_option.flag_init_integer_value = 0;
 154   gfc_option.flag_init_real = GFC_INIT_REAL_OFF;
 155   gfc_option.flag_init_logical = GFC_INIT_LOGICAL_OFF;
 156   gfc_option.flag_init_character = GFC_INIT_CHARACTER_OFF;
 157   gfc_option.flag_init_character_value = (char)0;
 158   gfc_option.flag_align_commons = 1;
 159   gfc_option.flag_protect_parens = -1;
 160   gfc_option.flag_realloc_lhs = -1;
 161   gfc_option.flag_aggressive_function_elimination = 0;
 162   gfc_option.flag_frontend_optimize = -1;
 163
 164   gfc_option.fpe = 0;
 165   /* All except GFC_FPE_INEXACT.  */
 166   gfc_option.fpe_summary = GFC_FPE_INVALID | GFC_FPE_DENORMAL
 167                            | GFC_FPE_ZERO | GFC_FPE_OVERFLOW
 168                            | GFC_FPE_UNDERFLOW;
 169   gfc_option.rtcheck = 0;
 170   gfc_option.coarray = GFC_FCOARRAY_NONE;
 171
 172   /* ??? Wmissing-include-dirs is disabled by default in C/C++ but
 173      enabled by default in Fortran.  Ideally, we should express this
 174      in .opt, but that is not supported yet.  */
 175   if (!global_options_set.x_cpp_warn_missing_include_dirs)
 176     global_options.x_cpp_warn_missing_include_dirs = 1;;
 177
 178   set_default_std_flags ();
 179
 180   /* Initialize cpp-related options.  */
 181   gfc_cpp_init_options (decoded_options_count, decoded_options);
 182   gfc_diagnostics_init ();
 183 }
 184
 185
 186 /* Determine the source form from the filename extension.  We assume
 187    case insensitivity.  */
 188
 189 static gfc_source_form
 190 form_from_filename (const char *filename)
 191 {
 192   static const struct
 193   {
 194     const char *extension;
 195     gfc_source_form form;
 196   }
 197   exttype[] =
 198   {
 199     {
 200     ".f90", FORM_FREE}
 201     ,
 202     {
 203     ".f95", FORM_FREE}
 204     ,
 205     {
 206     ".f03", FORM_FREE}
 207     ,
 208     {
 209     ".f08", FORM_FREE}
 210     ,
 211     {
 212     ".f", FORM_FIXED}
 213     ,
 214     {
 215     ".for", FORM_FIXED}
 216     ,
 217     {
 218     ".ftn", FORM_FIXED}
 219     ,
 220     {
 221     "", FORM_UNKNOWN}
 222   };            /* sentinel value */
 223
 224   gfc_source_form f_form;
 225   const char *fileext;
 226   int i;
 227
 228   /* Find end of file name.  Note, filename is either a NULL pointer or
 229      a NUL terminated string.  */
 230   i = 0;
 231   while (filename[i] != '\0')
 232     i++;
 233
 234   /* Find last period.  */
 235   while (i >= 0 && (filename[i] != '.'))
 236     i--;
 237
 238   /* Did we see a file extension?  */
 239   if (i < 0)
 240     return FORM_UNKNOWN; /* Nope  */
 241
 242   /* Get file extension and compare it to others.  */
 243   fileext = &(filename[i]);
 244
 245   i = -1;
 246   f_form = FORM_UNKNOWN;
 247   do
 248     {
 249       i++;
 250       if (strcasecmp (fileext, exttype[i].extension) == 0)
 251         {
 252           f_form = exttype[i].form;
 253           break;
 254         }
 255     }
 256   while (exttype[i].form != FORM_UNKNOWN);
 257
 258   return f_form;
 259 }
 260
 261
 262 /* Finalize commandline options.  */
 263
 264 bool
 265 gfc_post_options (const char **pfilename)
 266 {
 267   const char *filename = *pfilename, *canon_source_file = NULL;
 268   char *source_path;
 269   int i;
 270
 271   /* Excess precision other than "fast" requires front-end
 272      support.  */
 273   if (flag_excess_precision_cmdline == EXCESS_PRECISION_STANDARD
 274       && TARGET_FLT_EVAL_METHOD_NON_DEFAULT)
 275     sorry ("-fexcess-precision=standard for Fortran");
 276   flag_excess_precision_cmdline = EXCESS_PRECISION_FAST;
 277
 278   /* Fortran allows associative math - but we cannot reassociate if
 279      we want traps or signed zeros. Cf. also flag_protect_parens.  */
 280   if (flag_associative_math == -1)
 281     flag_associative_math = (!flag_trapping_math && !flag_signed_zeros);
 282
 283   if (gfc_option.flag_protect_parens == -1)
 284     gfc_option.flag_protect_parens = !optimize_fast;
 285
 286   if (gfc_option.flag_stack_arrays == -1)
 287     gfc_option.flag_stack_arrays = optimize_fast;
 288
 289   /* By default, disable (re)allocation during assignment for -std=f95,
 290      and enable it for F2003/F2008/GNU/Legacy.  */
 291   if (gfc_option.flag_realloc_lhs == -1)
 292     {
 293       if (gfc_option.allow_std & GFC_STD_F2003)
 294         gfc_option.flag_realloc_lhs = 1;
 295       else
 296         gfc_option.flag_realloc_lhs = 0;
 297     }
 298
 299   /* -fbounds-check is equivalent to -fcheck=bounds */
 300   if (flag_bounds_check)
 301     gfc_option.rtcheck |= GFC_RTCHECK_BOUNDS;
 302
 303   if (flag_compare_debug)
 304     gfc_option.dump_fortran_original = 0;
 305
 306   /* Make -fmax-errors visible to gfortran's diagnostic machinery.  */
 307   if (global_options_set.x_flag_max_errors)
 308     gfc_option.max_errors = flag_max_errors;
 309
 310   /* Verify the input file name.  */
 311   if (!filename || strcmp (filename, "-") == 0)
 312     {
 313       filename = "";
 314     }
 315
 316   if (gfc_option.flag_preprocessed)
 317     {
 318       /* For preprocessed files, if the first tokens are of the form # NUM.
 319          handle the directives so we know the original file name.  */
 320       gfc_source_file = gfc_read_orig_filename (filename, &canon_source_file);
 321       if (gfc_source_file == NULL)
 322         gfc_source_file = filename;
 323       else
 324         *pfilename = gfc_source_file;
 325     }
 326   else
 327     gfc_source_file = filename;
 328
 329   if (canon_source_file == NULL)
 330     canon_source_file = gfc_source_file;
 331
 332   /* Adds the path where the source file is to the list of include files.  */
 333
 334   i = strlen (canon_source_file);
 335   while (i > 0 && !IS_DIR_SEPARATOR (canon_source_file[i]))
 336     i--;
 337
 338   if (i != 0)
 339     {
 340       source_path = (char *) alloca (i + 1);
 341       memcpy (source_path, canon_source_file, i);
 342       source_path[i] = 0;
 343       gfc_add_include_path (source_path, true, true, true);
 344     }
 345   else
 346     gfc_add_include_path (".", true, true, true);
 347
 348   if (canon_source_file != gfc_source_file)
 349     free (CONST_CAST (char *, canon_source_file));
 350
 351   /* Decide which form the file will be read in as.  */
 352
 353   if (gfc_option.source_form != FORM_UNKNOWN)
 354     gfc_current_form = gfc_option.source_form;
 355   else
 356     {
 357       gfc_current_form = form_from_filename (filename);
 358
 359       if (gfc_current_form == FORM_UNKNOWN)
 360         {
 361           gfc_current_form = FORM_FREE;
 362           gfc_warning_now_2 ("Reading file %qs as free form",
 363                              (filename[0] == '\0') ? "<stdin>" : filename);
 364         }
 365     }
 366
 367   /* If the user specified -fd-lines-as-{code|comments} verify that we're
 368      in fixed form.  */
 369   if (gfc_current_form == FORM_FREE)
 370     {
 371       if (gfc_option.flag_d_lines == 0)
 372         gfc_warning_now_2 ("%<-fd-lines-as-comments%> has no effect "
 373                            "in free form");
 374       else if (gfc_option.flag_d_lines == 1)
 375         gfc_warning_now_2 ("%<-fd-lines-as-code%> has no effect in free form");
 376     }
 377
 378   /* If -pedantic, warn about the use of GNU extensions.  */
 379   if (pedantic && (gfc_option.allow_std & GFC_STD_GNU) != 0)
 380     gfc_option.warn_std |= GFC_STD_GNU;
 381   /* -std=legacy -pedantic is effectively -std=gnu.  */
 382   if (pedantic && (gfc_option.allow_std & GFC_STD_LEGACY) != 0)
 383     gfc_option.warn_std |= GFC_STD_F95_OBS | GFC_STD_F95_DEL | GFC_STD_LEGACY;
 384
 385   /* If the user didn't explicitly specify -f(no)-second-underscore we
 386      use it if we're trying to be compatible with f2c, and not
 387      otherwise.  */
 388   if (gfc_option.flag_second_underscore == -1)
 389     gfc_option.flag_second_underscore = gfc_option.flag_f2c;
 390
 391   if (!gfc_option.flag_automatic && gfc_option.flag_max_stack_var_size != -2
 392       && gfc_option.flag_max_stack_var_size != 0)
 393     gfc_warning_now_2 ("Flag %<-fno-automatic%> overwrites %<-fmax-stack-var-size=%d%>",
 394                        gfc_option.flag_max_stack_var_size);
 395   else if (!gfc_option.flag_automatic && gfc_option.flag_recursive)
 396     gfc_warning_now_2 ("Flag %<-fno-automatic%> overwrites %<-frecursive%>");
 397   else if (!gfc_option.flag_automatic && gfc_option.gfc_flag_openmp)
 398     gfc_warning_now_2 ("Flag %<-fno-automatic%> overwrites %<-frecursive%> implied by "
 399                        "%<-fopenmp%>");
 400   else if (gfc_option.flag_max_stack_var_size != -2
 401            && gfc_option.flag_recursive)
 402     gfc_warning_now_2 ("Flag %<-frecursive%> overwrites %<-fmax-stack-var-size=%d%>",
 403                        gfc_option.flag_max_stack_var_size);
 404   else if (gfc_option.flag_max_stack_var_size != -2
 405            && gfc_option.gfc_flag_openmp)
 406     gfc_warning_now_2 ("Flag %<-fmax-stack-var-size=%d%> overwrites %<-frecursive%> "
 407                        "implied by %<-fopenmp%>",
 408                      gfc_option.flag_max_stack_var_size);
 409
 410   /* Implement -frecursive as -fmax-stack-var-size=-1.  */
 411   if (gfc_option.flag_recursive)
 412     gfc_option.flag_max_stack_var_size = -1;
 413
 414   /* Implied -frecursive; implemented as -fmax-stack-var-size=-1.  */
 415   if (gfc_option.flag_max_stack_var_size == -2 && gfc_option.gfc_flag_openmp
 416       && gfc_option.flag_automatic)
 417     {
 418       gfc_option.flag_recursive = 1;
 419       gfc_option.flag_max_stack_var_size = -1;
 420     }
 421
 422   /* Set default.  */
 423   if (gfc_option.flag_max_stack_var_size == -2)
 424     gfc_option.flag_max_stack_var_size = 32768;
 425
 426   /* Implement -fno-automatic as -fmax-stack-var-size=0.  */
 427   if (!gfc_option.flag_automatic)
 428     gfc_option.flag_max_stack_var_size = 0;
 429
 430   if (pedantic)
 431     gfc_option.warn_ampersand = 1;
 432
 433   /* Optimization implies front end optimization, unless the user
 434      specified it directly.  */
 435
 436   if (gfc_option.flag_frontend_optimize == -1)
 437     gfc_option.flag_frontend_optimize = optimize;
 438
 439   if (gfc_option.warn_realloc_lhs_all)
 440     gfc_option.warn_realloc_lhs = 1;
 441
 442   gfc_cpp_post_options ();
 443
 444   return gfc_cpp_preprocess_only ();
 445 }
 446
 447
 448 /* Set the options for -Wall.  */
 449
 450 static void
 451 set_Wall (int setting)
 452 {
 453   gfc_option.warn_aliasing = setting;
 454   gfc_option.warn_ampersand = setting;
 455   gfc_option.warn_c_binding_type = setting;
 456   gfc_option.gfc_warn_conversion = setting;
 457   gfc_option.warn_line_truncation = setting;
 458   gfc_option.warn_surprising = setting;
 459   gfc_option.warn_underflow = setting;
 460   gfc_option.warn_intrinsic_shadow = setting;
 461   gfc_option.warn_intrinsics_std = setting;
 462   gfc_option.warn_real_q_constant = setting;
 463   gfc_option.warn_unused_dummy_argument = setting;
 464   gfc_option.warn_target_lifetime = setting;
 465   gfc_option.warn_zerotrip = setting;
 466
 467   warn_return_type = setting;
 468   warn_uninitialized = setting;
 469   warn_maybe_uninitialized = setting;
 470 }
 471
 472 /* Set the options for -Wextra.  */
 473
 474 static void
 475 set_Wextra (int setting)
 476 {
 477   gfc_option.warn_compare_reals = setting;
 478 }
 479
 480 static void
 481 gfc_handle_module_path_options (const char *arg)
 482 {
 483
 484   if (gfc_option.module_dir != NULL)
 485     gfc_fatal_error ("gfortran: Only one %<-J%> option allowed");
 486
 487   gfc_option.module_dir = XCNEWVEC (char, strlen (arg) + 2);
 488   strcpy (gfc_option.module_dir, arg);
 489
 490   gfc_add_include_path (gfc_option.module_dir, true, false, true);
 491
 492   strcat (gfc_option.module_dir, "/");
 493 }
 494
 495
 496 /* Handle options -ffpe-trap= and -ffpe-summary=.  */
 497
 498 static void
 499 gfc_handle_fpe_option (const char *arg, bool trap)
 500 {
 501   int result, pos = 0, n;
 502   /* precision is a backwards compatibility alias for inexact.  */
 503   static const char * const exception[] = { "invalid", "denormal", "zero",
 504                                             "overflow", "underflow",
 505                                             "inexact", "precision", NULL };
 506   static const int opt_exception[] = { GFC_FPE_INVALID, GFC_FPE_DENORMAL,
 507                                        GFC_FPE_ZERO, GFC_FPE_OVERFLOW,
 508                                        GFC_FPE_UNDERFLOW, GFC_FPE_INEXACT,
 509                                        GFC_FPE_INEXACT,
 510                                        0 };
 511
 512   /* As the default for -ffpe-summary= is nonzero, set it to 0.  */
 513   if (!trap)
 514     gfc_option.fpe_summary = 0;
 515
 516   while (*arg)
 517     {
 518       while (*arg == ',')
 519         arg++;
 520
 521       while (arg[pos] && arg[pos] != ',')
 522         pos++;
 523
 524       result = 0;
 525       if (!trap && strncmp ("none", arg, pos) == 0)
 526         {
 527           gfc_option.fpe_summary = 0;
 528           arg += pos;
 529           pos = 0;
 530           continue;
 531         }
 532       else if (!trap && strncmp ("all", arg, pos) == 0)
 533         {
 534           gfc_option.fpe_summary = GFC_FPE_INVALID | GFC_FPE_DENORMAL
 535                                    | GFC_FPE_ZERO | GFC_FPE_OVERFLOW
 536                                    | GFC_FPE_UNDERFLOW | GFC_FPE_INEXACT;
 537           arg += pos;
 538           pos = 0;
 539           continue;
 540         }
 541       else
 542         for (n = 0; exception[n] != NULL; n++)
 543           {
 544           if (exception[n] && strncmp (exception[n], arg, pos) == 0)
 545             {
 546               if (trap)
 547                 gfc_option.fpe |= opt_exception[n];
 548               else
 549                 gfc_option.fpe_summary |= opt_exception[n];
 550               arg += pos;
 551               pos = 0;
 552               result = 1;
 553               break;
 554             }
 555           }
 556       if (!result && !trap)
 557         gfc_fatal_error ("Argument to %<-ffpe-trap%> is not valid: %s", arg);
 558       else if (!result)
 559         gfc_fatal_error ("Argument to %<-ffpe-summary%> is not valid: %s", arg);
 560
 561     }
 562 }
 563
 564
 565 static void
 566 gfc_handle_coarray_option (const char *arg)
 567 {
 568   if (strcmp (arg, "none") == 0)
 569     gfc_option.coarray = GFC_FCOARRAY_NONE;
 570   else if (strcmp (arg, "single") == 0)
 571     gfc_option.coarray = GFC_FCOARRAY_SINGLE;
 572   else if (strcmp (arg, "lib") == 0)
 573     gfc_option.coarray = GFC_FCOARRAY_LIB;
 574   else
 575     gfc_fatal_error ("Argument to %<-fcoarray%> is not valid: %s", arg);
 576 }
 577
 578
 579 static void
 580 gfc_handle_runtime_check_option (const char *arg)
 581 {
 582   int result, pos = 0, n;
 583   static const char * const optname[] = { "all", "bounds", "array-temps",
 584                                           "recursion", "do", "pointer",
 585                                           "mem", NULL };
 586   static const int optmask[] = { GFC_RTCHECK_ALL, GFC_RTCHECK_BOUNDS,
 587                                  GFC_RTCHECK_ARRAY_TEMPS,
 588                                  GFC_RTCHECK_RECURSION, GFC_RTCHECK_DO,
 589                                  GFC_RTCHECK_POINTER, GFC_RTCHECK_MEM,
 590                                  0 };
 591
 592   while (*arg)
 593     {
 594       while (*arg == ',')
 595         arg++;
 596
 597       while (arg[pos] && arg[pos] != ',')
 598         pos++;
 599
 600       result = 0;
 601       for (n = 0; optname[n] != NULL; n++)
 602         {
 603           if (optname[n] && strncmp (optname[n], arg, pos) == 0)
 604             {
 605               gfc_option.rtcheck |= optmask[n];
 606               arg += pos;
 607               pos = 0;
 608               result = 1;
 609               break;
 610             }
 611         }
 612       if (!result)
 613         gfc_fatal_error ("Argument to %<-fcheck%> is not valid: %s", arg);
 614     }
 615 }
 616
 617
 618 /* Handle command-line options.  Returns 0 if unrecognized, 1 if
 619    recognized and handled.  */
 620
 621 bool
 622 gfc_handle_option (size_t scode, const char *arg, int value,
 623                    int kind ATTRIBUTE_UNUSED, location_t loc ATTRIBUTE_UNUSED,
 624                    const struct cl_option_handlers *handlers ATTRIBUTE_UNUSED)
 625 {
 626   bool result = true;
 627   enum opt_code code = (enum opt_code) scode;
 628
 629   if (gfc_cpp_handle_option (scode, arg, value) == 1)
 630     return true;
 631
 632   switch (code)
 633     {
 634     default:
 635       if (cl_options[code].flags & gfc_option_lang_mask ())
 636         break;
 637       result = false;
 638       break;
 639
 640     case OPT_Wall:
 641       handle_generated_option (&global_options, &global_options_set,
 642                                OPT_Wunused, NULL, value,
 643                                gfc_option_lang_mask (), kind, loc,
 644                                handlers, global_dc);
 645       set_Wall (value);
 646       break;
 647
 648     case OPT_Waliasing:
 649       gfc_option.warn_aliasing = value;
 650       break;
 651
 652     case OPT_Wampersand:
 653       gfc_option.warn_ampersand = value;
 654       break;
 655
 656     case OPT_Warray_temporaries:
 657       gfc_option.warn_array_temp = value;
 658       break;
 659
 660     case OPT_Wc_binding_type:
 661       gfc_option.warn_c_binding_type = value;
 662       break;
 663
 664     case OPT_Wcompare_reals:
 665       gfc_option.warn_compare_reals = value;
 666       break;
 667
 668     case OPT_Wconversion:
 669       gfc_option.gfc_warn_conversion = value;
 670       break;
 671
 672     case OPT_Wconversion_extra:
 673       gfc_option.warn_conversion_extra = value;
 674       break;
 675
 676     case OPT_Wextra:
 677       set_Wextra (value);
 678       break;
 679
 680     case OPT_Wfunction_elimination:
 681       gfc_option.warn_function_elimination = value;
 682       break;
 683
 684     case OPT_Wimplicit_interface:
 685       gfc_option.warn_implicit_interface = value;
 686       break;
 687
 688     case OPT_Wimplicit_procedure:
 689       gfc_option.warn_implicit_procedure = value;
 690       break;
 691
 692     case OPT_Wline_truncation:
 693       gfc_option.warn_line_truncation = value;
 694       break;
 695
 696     case OPT_Wrealloc_lhs:
 697       gfc_option.warn_realloc_lhs = value;
 698       break;
 699
 700     case OPT_Wrealloc_lhs_all:
 701       gfc_option.warn_realloc_lhs_all = value;
 702       break;
 703
 704     case OPT_Wreturn_type:
 705       warn_return_type = value;
 706       break;
 707
 708     case OPT_Wsurprising:
 709       gfc_option.warn_surprising = value;
 710       break;
 711
 712     case OPT_Wtarget_lifetime:
 713       gfc_option.warn_target_lifetime = value;
 714       break;
 715
 716     case OPT_Wunderflow:
 717       gfc_option.warn_underflow = value;
 718       break;
 719
 720     case OPT_Wintrinsic_shadow:
 721       gfc_option.warn_intrinsic_shadow = value;
 722       break;
 723
 724     case OPT_Walign_commons:
 725       gfc_option.warn_align_commons = value;
 726       break;
 727
 728     case OPT_Wreal_q_constant:
 729       gfc_option.warn_real_q_constant = value;
 730       break;
 731
 732     case OPT_Wunused_dummy_argument:
 733       gfc_option.warn_unused_dummy_argument = value;
 734       break;
 735
 736     case OPT_Wzerotrip:
 737       gfc_option.warn_zerotrip = value;
 738       break;
 739
 740     case OPT_fall_intrinsics:
 741       gfc_option.flag_all_intrinsics = 1;
 742       break;
 743
 744     case OPT_fautomatic:
 745       gfc_option.flag_automatic = value;
 746       break;
 747
 748     case OPT_fallow_leading_underscore:
 749       gfc_option.flag_allow_leading_underscore = value;
 750       break;
 751
 752     case OPT_fbackslash:
 753       gfc_option.flag_backslash = value;
 754       break;
 755
 756     case OPT_fbacktrace:
 757       gfc_option.flag_backtrace = value;
 758       break;
 759
 760     case OPT_fcheck_array_temporaries:
 761       gfc_option.rtcheck |= GFC_RTCHECK_ARRAY_TEMPS;
 762       break;
 763
 764     case OPT_fcray_pointer:
 765       gfc_option.flag_cray_pointer = value;
 766       break;
 767
 768     case OPT_ff2c:
 769       gfc_option.flag_f2c = value;
 770       break;
 771
 772     case OPT_fdollar_ok:
 773       gfc_option.flag_dollar_ok = value;
 774       break;
 775
 776     case OPT_fexternal_blas:
 777       gfc_option.flag_external_blas = value;
 778       break;
 779
 780     case OPT_fblas_matmul_limit_:
 781       gfc_option.blas_matmul_limit = value;
 782       break;
 783
 784     case OPT_fd_lines_as_code:
 785       gfc_option.flag_d_lines = 1;
 786       break;
 787
 788     case OPT_fd_lines_as_comments:
 789       gfc_option.flag_d_lines = 0;
 790       break;
 791
 792     case OPT_fdump_fortran_original:
 793     case OPT_fdump_parse_tree:
 794       gfc_option.dump_fortran_original = value;
 795       break;
 796
 797     case OPT_fdump_fortran_optimized:
 798       gfc_option.dump_fortran_optimized = value;
 799       break;
 800
 801     case OPT_ffixed_form:
 802       gfc_option.source_form = FORM_FIXED;
 803       break;
 804
 805     case OPT_ffixed_line_length_none:
 806       gfc_option.fixed_line_length = 0;
 807       break;
 808
 809     case OPT_ffixed_line_length_:
 810       if (value != 0 && value < 7)
 811         gfc_fatal_error ("Fixed line length must be at least seven");
 812       gfc_option.fixed_line_length = value;
 813       break;
 814
 815     case OPT_ffree_form:
 816       gfc_option.source_form = FORM_FREE;
 817       break;
 818
 819     case OPT_fopenmp:
 820       gfc_option.gfc_flag_openmp = value;
 821       break;
 822
 823     case OPT_fopenmp_simd:
 824       gfc_option.gfc_flag_openmp_simd = value;
 825       break;
 826
 827     case OPT_ffree_line_length_none:
 828       gfc_option.free_line_length = 0;
 829       break;
 830
 831     case OPT_ffree_line_length_:
 832       if (value != 0 && value < 4)
 833         gfc_fatal_error ("Free line length must be at least three");
 834       gfc_option.free_line_length = value;
 835       break;
 836
 837     case OPT_funderscoring:
 838       gfc_option.flag_underscoring = value;
 839       break;
 840
 841     case OPT_fsecond_underscore:
 842       gfc_option.flag_second_underscore = value;
 843       break;
 844
 845     case OPT_static_libgfortran:
 846 #ifndef HAVE_LD_STATIC_DYNAMIC
 847       gfc_fatal_error ("%<-static-libgfortran%> is not supported in this "
 848                        "configuration");
 849 #endif
 850       break;
 851
 852     case OPT_fimplicit_none:
 853       gfc_option.flag_implicit_none = value;
 854       break;
 855
 856     case OPT_fintrinsic_modules_path:
 857     case OPT_fintrinsic_modules_path_:
 858
 859       /* This is needed because omp_lib.h is in a directory together
 860          with intrinsic modules.  Do no warn because during testing
 861          without an installed compiler, we would get lots of bogus
 862          warnings for a missing include directory.  */
 863       gfc_add_include_path (arg, false, false, false);
 864
 865       gfc_add_intrinsic_modules_path (arg);
 866       break;
 867
 868     case OPT_fmax_array_constructor_:
 869       gfc_option.flag_max_array_constructor = value > 65535 ? value : 65535;
 870       break;
 871
 872     case OPT_fmax_stack_var_size_:
 873       gfc_option.flag_max_stack_var_size = value;
 874       break;
 875
 876     case OPT_fstack_arrays:
 877       gfc_option.flag_stack_arrays = value;
 878       break;
 879
 880     case OPT_fmodule_private:
 881       gfc_option.flag_module_private = value;
 882       break;
 883
 884     case OPT_frange_check:
 885       gfc_option.flag_range_check = value;
 886       break;
 887
 888     case OPT_fpack_derived:
 889       gfc_option.flag_pack_derived = value;
 890       break;
 891
 892     case OPT_frepack_arrays:
 893       gfc_option.flag_repack_arrays = value;
 894       break;
 895
 896     case OPT_fpreprocessed:
 897       gfc_option.flag_preprocessed = value;
 898       break;
 899
 900     case OPT_fmax_identifier_length_:
 901       if (value > GFC_MAX_SYMBOL_LEN)
 902         gfc_fatal_error ("Maximum supported identifier length is %d",
 903                          GFC_MAX_SYMBOL_LEN);
 904       gfc_option.max_identifier_length = value;
 905       break;
 906
 907     case OPT_fdefault_integer_8:
 908       gfc_option.flag_default_integer = value;
 909       break;
 910
 911     case OPT_fdefault_real_8:
 912       gfc_option.flag_default_real = value;
 913       break;
 914
 915     case OPT_fdefault_double_8:
 916       gfc_option.flag_default_double = value;
 917       break;
 918
 919     case OPT_finteger_4_integer_8:
 920       gfc_option.flag_integer4_kind = 8;
 921       break;
 922
 923     case OPT_freal_4_real_8:
 924       gfc_option.flag_real4_kind = 8;
 925       break;
 926
 927     case OPT_freal_4_real_10:
 928       gfc_option.flag_real4_kind = 10;
 929       break;
 930
 931     case OPT_freal_4_real_16:
 932       gfc_option.flag_real4_kind = 16;
 933       break;
 934
 935     case OPT_freal_8_real_4:
 936       gfc_option.flag_real8_kind = 4;
 937       break;
 938
 939     case OPT_freal_8_real_10:
 940       gfc_option.flag_real8_kind = 10;
 941       break;
 942
 943     case OPT_freal_8_real_16:
 944       gfc_option.flag_real8_kind = 16;
 945       break;
 946
 947     case OPT_finit_local_zero:
 948       gfc_option.flag_init_integer = GFC_INIT_INTEGER_ON;
 949       gfc_option.flag_init_integer_value = 0;
 950       gfc_option.flag_init_real = GFC_INIT_REAL_ZERO;
 951       gfc_option.flag_init_logical = GFC_INIT_LOGICAL_FALSE;
 952       gfc_option.flag_init_character = GFC_INIT_CHARACTER_ON;
 953       gfc_option.flag_init_character_value = (char)0;
 954       break;
 955
 956     case OPT_finit_logical_:
 957       if (!strcasecmp (arg, "false"))
 958         gfc_option.flag_init_logical = GFC_INIT_LOGICAL_FALSE;
 959       else if (!strcasecmp (arg, "true"))
 960         gfc_option.flag_init_logical = GFC_INIT_LOGICAL_TRUE;
 961       else
 962         gfc_fatal_error ("Unrecognized option to %<-finit-logical%>: %s",
 963                          arg);
 964       break;
 965
 966     case OPT_finit_real_:
 967       if (!strcasecmp (arg, "zero"))
 968         gfc_option.flag_init_real = GFC_INIT_REAL_ZERO;
 969       else if (!strcasecmp (arg, "nan"))
 970         gfc_option.flag_init_real = GFC_INIT_REAL_NAN;
 971       else if (!strcasecmp (arg, "snan"))
 972         gfc_option.flag_init_real = GFC_INIT_REAL_SNAN;
 973       else if (!strcasecmp (arg, "inf"))
 974         gfc_option.flag_init_real = GFC_INIT_REAL_INF;
 975       else if (!strcasecmp (arg, "-inf"))
 976         gfc_option.flag_init_real = GFC_INIT_REAL_NEG_INF;
 977       else
 978         gfc_fatal_error ("Unrecognized option to %<-finit-real%>: %s",
 979                          arg);
 980       break;
 981
 982     case OPT_finit_integer_:
 983       gfc_option.flag_init_integer = GFC_INIT_INTEGER_ON;
 984       gfc_option.flag_init_integer_value = atoi (arg);
 985       break;
 986
 987     case OPT_finit_character_:
 988       if (value >= 0 && value <= 127)
 989         {
 990           gfc_option.flag_init_character = GFC_INIT_CHARACTER_ON;
 991           gfc_option.flag_init_character_value = (char)value;
 992         }
 993       else
 994         gfc_fatal_error ("The value of n in %<-finit-character=n%> must be "
 995                          "between 0 and 127");
 996       break;
 997
 998     case OPT_I:
 999       gfc_add_include_path (arg, true, false, true);
1000       break;
1001
1002     case OPT_J:
1003       gfc_handle_module_path_options (arg);
1004       break;
1005
1006     case OPT_fsign_zero:
1007       gfc_option.flag_sign_zero = value;
1008       break;
1009
1010     case OPT_ffpe_trap_:
1011       gfc_handle_fpe_option (arg, true);
1012       break;
1013
1014     case OPT_ffpe_summary_:
1015       gfc_handle_fpe_option (arg, false);
1016       break;
1017
1018     case OPT_std_f95:
1019       gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95 | GFC_STD_F77
1020                              | GFC_STD_F2008_OBS;
1021       gfc_option.warn_std = GFC_STD_F95_OBS;
1022       gfc_option.max_continue_fixed = 19;
1023       gfc_option.max_continue_free = 39;
1024       gfc_option.max_identifier_length = 31;
1025       gfc_option.warn_ampersand = 1;
1026       warn_tabs = 1;
1027       break;
1028
1029     case OPT_std_f2003:
1030       gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
1031         | GFC_STD_F2003 | GFC_STD_F95 | GFC_STD_F2008_OBS;
1032       gfc_option.warn_std = GFC_STD_F95_OBS;
1033       gfc_option.max_identifier_length = 63;
1034       gfc_option.warn_ampersand = 1;
1035       warn_tabs = 1;
1036       break;
1037
1038     case OPT_std_f2008:
1039       gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
1040         | GFC_STD_F2003 | GFC_STD_F95 | GFC_STD_F2008 | GFC_STD_F2008_OBS;
1041       gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F2008_OBS;
1042       gfc_option.max_identifier_length = 63;
1043       gfc_option.warn_ampersand = 1;
1044       warn_tabs = 1;
1045       break;
1046
1047     case OPT_std_f2008ts:
1048       gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
1049         | GFC_STD_F2003 | GFC_STD_F95 | GFC_STD_F2008 | GFC_STD_F2008_OBS
1050         | GFC_STD_F2008_TS;
1051       gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F2008_OBS;
1052       gfc_option.max_identifier_length = 63;
1053       gfc_option.warn_ampersand = 1;
1054       warn_tabs = 1;
1055       break;
1056
1057     case OPT_std_gnu:
1058       set_default_std_flags ();
1059       break;
1060
1061     case OPT_std_legacy:
1062       set_default_std_flags ();
1063       gfc_option.warn_std = 0;
1064       break;
1065
1066     case OPT_Wintrinsics_std:
1067       gfc_option.warn_intrinsics_std = value;
1068       break;
1069
1070     case OPT_fshort_enums:
1071       /* Handled in language-independent code.  */
1072       break;
1073
1074     case OPT_fconvert_little_endian:
1075       gfc_option.convert = GFC_CONVERT_LITTLE;
1076       break;
1077
1078     case OPT_fconvert_big_endian:
1079       gfc_option.convert = GFC_CONVERT_BIG;
1080       break;
1081
1082     case OPT_fconvert_native:
1083       gfc_option.convert = GFC_CONVERT_NATIVE;
1084       break;
1085
1086     case OPT_fconvert_swap:
1087       gfc_option.convert = GFC_CONVERT_SWAP;
1088       break;
1089
1090     case OPT_frecord_marker_4:
1091       gfc_option.record_marker = 4;
1092       break;
1093
1094     case OPT_frecord_marker_8:
1095       gfc_option.record_marker = 8;
1096       break;
1097
1098     case OPT_fmax_subrecord_length_:
1099       if (value > MAX_SUBRECORD_LENGTH)
1100         gfc_fatal_error ("Maximum subrecord length cannot exceed %d",
1101                          MAX_SUBRECORD_LENGTH);
1102
1103       gfc_option.max_subrecord_length = value;
1104       break;
1105
1106     case OPT_frecursive:
1107       gfc_option.flag_recursive = value;
1108       break;
1109
1110     case OPT_falign_commons:
1111       gfc_option.flag_align_commons = value;
1112       break;
1113
1114     case  OPT_faggressive_function_elimination:
1115       gfc_option.flag_aggressive_function_elimination = value;
1116       break;
1117
1118     case OPT_ffrontend_optimize:
1119       gfc_option.flag_frontend_optimize = value;
1120       break;
1121
1122     case OPT_fprotect_parens:
1123       gfc_option.flag_protect_parens = value;
1124       break;
1125
1126     case OPT_frealloc_lhs:
1127       gfc_option.flag_realloc_lhs = value;
1128       break;
1129
1130     case OPT_fcheck_:
1131       gfc_handle_runtime_check_option (arg);
1132       break;
1133
1134     case OPT_fcoarray_:
1135       gfc_handle_coarray_option (arg);
1136       break;
1137     }
1138
1139   Fortran_handle_option_auto (&global_options, &global_options_set,
1140                               scode, arg, value,
1141                               gfc_option_lang_mask (), kind,
1142                               loc, handlers, global_dc);
1143   return result;
1144 }
1145
1146
1147 /* Return a string with the options passed to the compiler; used for
1148    Fortran's compiler_options() intrinsic.  */
1149
1150 char *
1151 gfc_get_option_string (void)
1152 {
1153   unsigned j;
1154   size_t len, pos;
1155   char *result;
1156
1157   /* Allocate and return a one-character string with '\0'.  */
1158   if (!save_decoded_options_count)
1159     return XCNEWVEC (char, 1);
1160
1161   /* Determine required string length.  */
1162
1163   len = 0;
1164   for (j = 1; j < save_decoded_options_count; j++)
1165     {
1166       switch (save_decoded_options[j].opt_index)
1167         {
1168         case OPT_o:
1169         case OPT_d:
1170         case OPT_dumpbase:
1171         case OPT_dumpdir:
1172         case OPT_auxbase:
1173         case OPT_quiet:
1174         case OPT_version:
1175         case OPT_fintrinsic_modules_path:
1176         case OPT_fintrinsic_modules_path_:
1177           /* Ignore these.  */
1178           break;
1179         default:
1180           /* Ignore file names.  */
1181           if (save_decoded_options[j].orig_option_with_args_text[0] == '-')
1182             len += 1
1183                  + strlen (save_decoded_options[j].orig_option_with_args_text);
1184         }
1185     }
1186
1187   result = XCNEWVEC (char, len);
1188
1189   pos = 0;
1190   for (j = 1; j < save_decoded_options_count; j++)
1191     {
1192       switch (save_decoded_options[j].opt_index)
1193         {
1194         case OPT_o:
1195         case OPT_d:
1196         case OPT_dumpbase:
1197         case OPT_dumpdir:
1198         case OPT_auxbase:
1199         case OPT_quiet:
1200         case OPT_version:
1201         case OPT_fintrinsic_modules_path:
1202         case OPT_fintrinsic_modules_path_:
1203           /* Ignore these.  */
1204           continue;
1205
1206         case OPT_cpp_:
1207           /* Use "-cpp" rather than "-cpp=<temporary file>".  */
1208           len = 4;
1209           break;
1210
1211         default:
1212           /* Ignore file names.  */
1213           if (save_decoded_options[j].orig_option_with_args_text[0] != '-')
1214             continue;
1215
1216           len = strlen (save_decoded_options[j].orig_option_with_args_text);
1217         }
1218
1219       memcpy (&result[pos], save_decoded_options[j].orig_option_with_args_text, len);
1220       pos += len;
1221       result[pos++] = ' ';
1222     }
1223
1224   result[--pos] = '\0';
1225   return result;
1226 }