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_character_truncation = 0;
  99   gfc_option.warn_array_temp = 0;
 100   gfc_option.warn_c_binding_type = 0;
 101   gfc_option.gfc_warn_conversion = 0;
 102   gfc_option.warn_conversion_extra = 0;
 103   gfc_option.warn_function_elimination = 0;
 104   gfc_option.warn_implicit_interface = 0;
 105   gfc_option.warn_line_truncation = 0;
 106   gfc_option.warn_surprising = 0;
 107   gfc_option.warn_underflow = 1;
 108   gfc_option.warn_intrinsic_shadow = 0;
 109   gfc_option.warn_intrinsics_std = 0;
 110   gfc_option.warn_align_commons = 1;
 111   gfc_option.warn_real_q_constant = 0;
 112   gfc_option.warn_unused_dummy_argument = 0;
 113   gfc_option.warn_zerotrip = 0;
 114   gfc_option.warn_realloc_lhs = 0;
 115   gfc_option.warn_realloc_lhs_all = 0;
 116   gfc_option.warn_compare_reals = 0;
 117   gfc_option.warn_target_lifetime = 0;
 118   gfc_option.max_errors = 25;
 119
 120   gfc_option.flag_all_intrinsics = 0;
 121   gfc_option.flag_default_double = 0;
 122   gfc_option.flag_default_integer = 0;
 123   gfc_option.flag_default_real = 0;
 124   gfc_option.flag_integer4_kind = 0;
 125   gfc_option.flag_real4_kind = 0;
 126   gfc_option.flag_real8_kind = 0;
 127   gfc_option.flag_dollar_ok = 0;
 128   gfc_option.flag_underscoring = 1;
 129   gfc_option.flag_f2c = 0;
 130   gfc_option.flag_second_underscore = -1;
 131   gfc_option.flag_implicit_none = 0;
 132
 133   /* Default value of flag_max_stack_var_size is set in gfc_post_options.  */
 134   gfc_option.flag_max_stack_var_size = -2;
 135   gfc_option.flag_stack_arrays = -1;
 136
 137   gfc_option.flag_range_check = 1;
 138   gfc_option.flag_pack_derived = 0;
 139   gfc_option.flag_repack_arrays = 0;
 140   gfc_option.flag_preprocessed = 0;
 141   gfc_option.flag_automatic = 1;
 142   gfc_option.flag_backslash = 0;
 143   gfc_option.flag_module_private = 0;
 144   gfc_option.flag_backtrace = 1;
 145   gfc_option.flag_allow_leading_underscore = 0;
 146   gfc_option.flag_external_blas = 0;
 147   gfc_option.blas_matmul_limit = 30;
 148   gfc_option.flag_cray_pointer = 0;
 149   gfc_option.flag_d_lines = -1;
 150   gfc_option.gfc_flag_openmp = 0;
 151   gfc_option.flag_sign_zero = 1;
 152   gfc_option.flag_recursive = 0;
 153   gfc_option.flag_init_integer = GFC_INIT_INTEGER_OFF;
 154   gfc_option.flag_init_integer_value = 0;
 155   gfc_option.flag_init_real = GFC_INIT_REAL_OFF;
 156   gfc_option.flag_init_logical = GFC_INIT_LOGICAL_OFF;
 157   gfc_option.flag_init_character = GFC_INIT_CHARACTER_OFF;
 158   gfc_option.flag_init_character_value = (char)0;
 159   gfc_option.flag_align_commons = 1;
 160   gfc_option.flag_protect_parens = -1;
 161   gfc_option.flag_realloc_lhs = -1;
 162   gfc_option.flag_aggressive_function_elimination = 0;
 163   gfc_option.flag_frontend_optimize = -1;
 164
 165   gfc_option.fpe = 0;
 166   /* All except GFC_FPE_INEXACT.  */
 167   gfc_option.fpe_summary = GFC_FPE_INVALID | GFC_FPE_DENORMAL
 168                            | GFC_FPE_ZERO | GFC_FPE_OVERFLOW
 169                            | GFC_FPE_UNDERFLOW;
 170   gfc_option.rtcheck = 0;
 171   gfc_option.coarray = GFC_FCOARRAY_NONE;
 172
 173   /* ??? Wmissing-include-dirs is disabled by default in C/C++ but
 174      enabled by default in Fortran.  Ideally, we should express this
 175      in .opt, but that is not supported yet.  */
 176   if (!global_options_set.x_cpp_warn_missing_include_dirs)
 177     global_options.x_cpp_warn_missing_include_dirs = 1;;
 178
 179   set_default_std_flags ();
 180
 181   /* Initialize cpp-related options.  */
 182   gfc_cpp_init_options (decoded_options_count, decoded_options);
 183   gfc_diagnostics_init ();
 184 }
 185
 186
 187 /* Determine the source form from the filename extension.  We assume
 188    case insensitivity.  */
 189
 190 static gfc_source_form
 191 form_from_filename (const char *filename)
 192 {
 193   static const struct
 194   {
 195     const char *extension;
 196     gfc_source_form form;
 197   }
 198   exttype[] =
 199   {
 200     {
 201     ".f90", FORM_FREE}
 202     ,
 203     {
 204     ".f95", FORM_FREE}
 205     ,
 206     {
 207     ".f03", FORM_FREE}
 208     ,
 209     {
 210     ".f08", FORM_FREE}
 211     ,
 212     {
 213     ".f", FORM_FIXED}
 214     ,
 215     {
 216     ".for", FORM_FIXED}
 217     ,
 218     {
 219     ".ftn", FORM_FIXED}
 220     ,
 221     {
 222     "", FORM_UNKNOWN}
 223   };            /* sentinel value */
 224
 225   gfc_source_form f_form;
 226   const char *fileext;
 227   int i;
 228
 229   /* Find end of file name.  Note, filename is either a NULL pointer or
 230      a NUL terminated string.  */
 231   i = 0;
 232   while (filename[i] != '\0')
 233     i++;
 234
 235   /* Find last period.  */
 236   while (i >= 0 && (filename[i] != '.'))
 237     i--;
 238
 239   /* Did we see a file extension?  */
 240   if (i < 0)
 241     return FORM_UNKNOWN; /* Nope  */
 242
 243   /* Get file extension and compare it to others.  */
 244   fileext = &(filename[i]);
 245
 246   i = -1;
 247   f_form = FORM_UNKNOWN;
 248   do
 249     {
 250       i++;
 251       if (strcasecmp (fileext, exttype[i].extension) == 0)
 252         {
 253           f_form = exttype[i].form;
 254           break;
 255         }
 256     }
 257   while (exttype[i].form != FORM_UNKNOWN);
 258
 259   return f_form;
 260 }
 261
 262
 263 /* Finalize commandline options.  */
 264
 265 bool
 266 gfc_post_options (const char **pfilename)
 267 {
 268   const char *filename = *pfilename, *canon_source_file = NULL;
 269   char *source_path;
 270   int i;
 271
 272   /* Excess precision other than "fast" requires front-end
 273      support.  */
 274   if (flag_excess_precision_cmdline == EXCESS_PRECISION_STANDARD
 275       && TARGET_FLT_EVAL_METHOD_NON_DEFAULT)
 276     sorry ("-fexcess-precision=standard for Fortran");
 277   flag_excess_precision_cmdline = EXCESS_PRECISION_FAST;
 278
 279   /* Fortran allows associative math - but we cannot reassociate if
 280      we want traps or signed zeros. Cf. also flag_protect_parens.  */
 281   if (flag_associative_math == -1)
 282     flag_associative_math = (!flag_trapping_math && !flag_signed_zeros);
 283
 284   if (gfc_option.flag_protect_parens == -1)
 285     gfc_option.flag_protect_parens = !optimize_fast;
 286
 287   if (gfc_option.flag_stack_arrays == -1)
 288     gfc_option.flag_stack_arrays = optimize_fast;
 289
 290   /* By default, disable (re)allocation during assignment for -std=f95,
 291      and enable it for F2003/F2008/GNU/Legacy.  */
 292   if (gfc_option.flag_realloc_lhs == -1)
 293     {
 294       if (gfc_option.allow_std & GFC_STD_F2003)
 295         gfc_option.flag_realloc_lhs = 1;
 296       else
 297         gfc_option.flag_realloc_lhs = 0;
 298     }
 299
 300   /* -fbounds-check is equivalent to -fcheck=bounds */
 301   if (flag_bounds_check)
 302     gfc_option.rtcheck |= GFC_RTCHECK_BOUNDS;
 303
 304   if (flag_compare_debug)
 305     gfc_option.dump_fortran_original = 0;
 306
 307   /* Make -fmax-errors visible to gfortran's diagnostic machinery.  */
 308   if (global_options_set.x_flag_max_errors)
 309     gfc_option.max_errors = flag_max_errors;
 310
 311   /* Verify the input file name.  */
 312   if (!filename || strcmp (filename, "-") == 0)
 313     {
 314       filename = "";
 315     }
 316
 317   if (gfc_option.flag_preprocessed)
 318     {
 319       /* For preprocessed files, if the first tokens are of the form # NUM.
 320          handle the directives so we know the original file name.  */
 321       gfc_source_file = gfc_read_orig_filename (filename, &canon_source_file);
 322       if (gfc_source_file == NULL)
 323         gfc_source_file = filename;
 324       else
 325         *pfilename = gfc_source_file;
 326     }
 327   else
 328     gfc_source_file = filename;
 329
 330   if (canon_source_file == NULL)
 331     canon_source_file = gfc_source_file;
 332
 333   /* Adds the path where the source file is to the list of include files.  */
 334
 335   i = strlen (canon_source_file);
 336   while (i > 0 && !IS_DIR_SEPARATOR (canon_source_file[i]))
 337     i--;
 338
 339   if (i != 0)
 340     {
 341       source_path = (char *) alloca (i + 1);
 342       memcpy (source_path, canon_source_file, i);
 343       source_path[i] = 0;
 344       gfc_add_include_path (source_path, true, true, true);
 345     }
 346   else
 347     gfc_add_include_path (".", true, true, true);
 348
 349   if (canon_source_file != gfc_source_file)
 350     free (CONST_CAST (char *, canon_source_file));
 351
 352   /* Decide which form the file will be read in as.  */
 353
 354   if (gfc_option.source_form != FORM_UNKNOWN)
 355     gfc_current_form = gfc_option.source_form;
 356   else
 357     {
 358       gfc_current_form = form_from_filename (filename);
 359
 360       if (gfc_current_form == FORM_UNKNOWN)
 361         {
 362           gfc_current_form = FORM_FREE;
 363           gfc_warning_now_2 ("Reading file %qs as free form",
 364                              (filename[0] == '\0') ? "<stdin>" : filename);
 365         }
 366     }
 367
 368   /* If the user specified -fd-lines-as-{code|comments} verify that we're
 369      in fixed form.  */
 370   if (gfc_current_form == FORM_FREE)
 371     {
 372       if (gfc_option.flag_d_lines == 0)
 373         gfc_warning_now_2 ("%<-fd-lines-as-comments%> has no effect "
 374                            "in free form");
 375       else if (gfc_option.flag_d_lines == 1)
 376         gfc_warning_now_2 ("%<-fd-lines-as-code%> has no effect in free form");
 377     }
 378
 379   /* If -pedantic, warn about the use of GNU extensions.  */
 380   if (pedantic && (gfc_option.allow_std & GFC_STD_GNU) != 0)
 381     gfc_option.warn_std |= GFC_STD_GNU;
 382   /* -std=legacy -pedantic is effectively -std=gnu.  */
 383   if (pedantic && (gfc_option.allow_std & GFC_STD_LEGACY) != 0)
 384     gfc_option.warn_std |= GFC_STD_F95_OBS | GFC_STD_F95_DEL | GFC_STD_LEGACY;
 385
 386   /* If the user didn't explicitly specify -f(no)-second-underscore we
 387      use it if we're trying to be compatible with f2c, and not
 388      otherwise.  */
 389   if (gfc_option.flag_second_underscore == -1)
 390     gfc_option.flag_second_underscore = gfc_option.flag_f2c;
 391
 392   if (!gfc_option.flag_automatic && gfc_option.flag_max_stack_var_size != -2
 393       && gfc_option.flag_max_stack_var_size != 0)
 394     gfc_warning_now_2 ("Flag %<-fno-automatic%> overwrites %<-fmax-stack-var-size=%d%>",
 395                        gfc_option.flag_max_stack_var_size);
 396   else if (!gfc_option.flag_automatic && gfc_option.flag_recursive)
 397     gfc_warning_now_2 ("Flag %<-fno-automatic%> overwrites %<-frecursive%>");
 398   else if (!gfc_option.flag_automatic && gfc_option.gfc_flag_openmp)
 399     gfc_warning_now_2 ("Flag %<-fno-automatic%> overwrites %<-frecursive%> implied by "
 400                        "%<-fopenmp%>");
 401   else if (gfc_option.flag_max_stack_var_size != -2
 402            && gfc_option.flag_recursive)
 403     gfc_warning_now_2 ("Flag %<-frecursive%> overwrites %<-fmax-stack-var-size=%d%>",
 404                        gfc_option.flag_max_stack_var_size);
 405   else if (gfc_option.flag_max_stack_var_size != -2
 406            && gfc_option.gfc_flag_openmp)
 407     gfc_warning_now_2 ("Flag %<-fmax-stack-var-size=%d%> overwrites %<-frecursive%> "
 408                        "implied by %<-fopenmp%>",
 409                      gfc_option.flag_max_stack_var_size);
 410
 411   /* Implement -frecursive as -fmax-stack-var-size=-1.  */
 412   if (gfc_option.flag_recursive)
 413     gfc_option.flag_max_stack_var_size = -1;
 414
 415   /* Implied -frecursive; implemented as -fmax-stack-var-size=-1.  */
 416   if (gfc_option.flag_max_stack_var_size == -2 && gfc_option.gfc_flag_openmp
 417       && gfc_option.flag_automatic)
 418     {
 419       gfc_option.flag_recursive = 1;
 420       gfc_option.flag_max_stack_var_size = -1;
 421     }
 422
 423   /* Set default.  */
 424   if (gfc_option.flag_max_stack_var_size == -2)
 425     gfc_option.flag_max_stack_var_size = 32768;
 426
 427   /* Implement -fno-automatic as -fmax-stack-var-size=0.  */
 428   if (!gfc_option.flag_automatic)
 429     gfc_option.flag_max_stack_var_size = 0;
 430
 431   if (pedantic)
 432     gfc_option.warn_ampersand = 1;
 433
 434   /* Optimization implies front end optimization, unless the user
 435      specified it directly.  */
 436
 437   if (gfc_option.flag_frontend_optimize == -1)
 438     gfc_option.flag_frontend_optimize = optimize;
 439
 440   if (gfc_option.warn_realloc_lhs_all)
 441     gfc_option.warn_realloc_lhs = 1;
 442
 443   gfc_cpp_post_options ();
 444
 445   return gfc_cpp_preprocess_only ();
 446 }
 447
 448
 449 /* Set the options for -Wall.  */
 450
 451 static void
 452 set_Wall (int setting)
 453 {
 454   gfc_option.warn_aliasing = setting;
 455   gfc_option.warn_ampersand = setting;
 456   gfc_option.warn_c_binding_type = setting;
 457   gfc_option.gfc_warn_conversion = setting;
 458   gfc_option.warn_line_truncation = setting;
 459   gfc_option.warn_surprising = setting;
 460   gfc_option.warn_underflow = setting;
 461   gfc_option.warn_intrinsic_shadow = setting;
 462   gfc_option.warn_intrinsics_std = setting;
 463   gfc_option.warn_character_truncation = setting;
 464   gfc_option.warn_real_q_constant = setting;
 465   gfc_option.warn_unused_dummy_argument = setting;
 466   gfc_option.warn_target_lifetime = setting;
 467   gfc_option.warn_zerotrip = setting;
 468
 469   warn_return_type = setting;
 470   warn_uninitialized = setting;
 471   warn_maybe_uninitialized = setting;
 472 }
 473
 474 /* Set the options for -Wextra.  */
 475
 476 static void
 477 set_Wextra (int setting)
 478 {
 479   gfc_option.warn_compare_reals = setting;
 480 }
 481
 482 static void
 483 gfc_handle_module_path_options (const char *arg)
 484 {
 485
 486   if (gfc_option.module_dir != NULL)
 487     gfc_fatal_error ("gfortran: Only one %<-J%> option allowed");
 488
 489   gfc_option.module_dir = XCNEWVEC (char, strlen (arg) + 2);
 490   strcpy (gfc_option.module_dir, arg);
 491
 492   gfc_add_include_path (gfc_option.module_dir, true, false, true);
 493
 494   strcat (gfc_option.module_dir, "/");
 495 }
 496
 497
 498 /* Handle options -ffpe-trap= and -ffpe-summary=.  */
 499
 500 static void
 501 gfc_handle_fpe_option (const char *arg, bool trap)
 502 {
 503   int result, pos = 0, n;
 504   /* precision is a backwards compatibility alias for inexact.  */
 505   static const char * const exception[] = { "invalid", "denormal", "zero",
 506                                             "overflow", "underflow",
 507                                             "inexact", "precision", NULL };
 508   static const int opt_exception[] = { GFC_FPE_INVALID, GFC_FPE_DENORMAL,
 509                                        GFC_FPE_ZERO, GFC_FPE_OVERFLOW,
 510                                        GFC_FPE_UNDERFLOW, GFC_FPE_INEXACT,
 511                                        GFC_FPE_INEXACT,
 512                                        0 };
 513
 514   /* As the default for -ffpe-summary= is nonzero, set it to 0.  */
 515   if (!trap)
 516     gfc_option.fpe_summary = 0;
 517
 518   while (*arg)
 519     {
 520       while (*arg == ',')
 521         arg++;
 522
 523       while (arg[pos] && arg[pos] != ',')
 524         pos++;
 525
 526       result = 0;
 527       if (!trap && strncmp ("none", arg, pos) == 0)
 528         {
 529           gfc_option.fpe_summary = 0;
 530           arg += pos;
 531           pos = 0;
 532           continue;
 533         }
 534       else if (!trap && strncmp ("all", arg, pos) == 0)
 535         {
 536           gfc_option.fpe_summary = GFC_FPE_INVALID | GFC_FPE_DENORMAL
 537                                    | GFC_FPE_ZERO | GFC_FPE_OVERFLOW
 538                                    | GFC_FPE_UNDERFLOW | GFC_FPE_INEXACT;
 539           arg += pos;
 540           pos = 0;
 541           continue;
 542         }
 543       else
 544         for (n = 0; exception[n] != NULL; n++)
 545           {
 546           if (exception[n] && strncmp (exception[n], arg, pos) == 0)
 547             {
 548               if (trap)
 549                 gfc_option.fpe |= opt_exception[n];
 550               else
 551                 gfc_option.fpe_summary |= opt_exception[n];
 552               arg += pos;
 553               pos = 0;
 554               result = 1;
 555               break;
 556             }
 557           }
 558       if (!result && !trap)
 559         gfc_fatal_error ("Argument to %<-ffpe-trap%> is not valid: %s", arg);
 560       else if (!result)
 561         gfc_fatal_error ("Argument to %<-ffpe-summary%> is not valid: %s", arg);
 562
 563     }
 564 }
 565
 566
 567 static void
 568 gfc_handle_coarray_option (const char *arg)
 569 {
 570   if (strcmp (arg, "none") == 0)
 571     gfc_option.coarray = GFC_FCOARRAY_NONE;
 572   else if (strcmp (arg, "single") == 0)
 573     gfc_option.coarray = GFC_FCOARRAY_SINGLE;
 574   else if (strcmp (arg, "lib") == 0)
 575     gfc_option.coarray = GFC_FCOARRAY_LIB;
 576   else
 577     gfc_fatal_error ("Argument to %<-fcoarray%> is not valid: %s", arg);
 578 }
 579
 580
 581 static void
 582 gfc_handle_runtime_check_option (const char *arg)
 583 {
 584   int result, pos = 0, n;
 585   static const char * const optname[] = { "all", "bounds", "array-temps",
 586                                           "recursion", "do", "pointer",
 587                                           "mem", NULL };
 588   static const int optmask[] = { GFC_RTCHECK_ALL, GFC_RTCHECK_BOUNDS,
 589                                  GFC_RTCHECK_ARRAY_TEMPS,
 590                                  GFC_RTCHECK_RECURSION, GFC_RTCHECK_DO,
 591                                  GFC_RTCHECK_POINTER, GFC_RTCHECK_MEM,
 592                                  0 };
 593
 594   while (*arg)
 595     {
 596       while (*arg == ',')
 597         arg++;
 598
 599       while (arg[pos] && arg[pos] != ',')
 600         pos++;
 601
 602       result = 0;
 603       for (n = 0; optname[n] != NULL; n++)
 604         {
 605           if (optname[n] && strncmp (optname[n], arg, pos) == 0)
 606             {
 607               gfc_option.rtcheck |= optmask[n];
 608               arg += pos;
 609               pos = 0;
 610               result = 1;
 611               break;
 612             }
 613         }
 614       if (!result)
 615         gfc_fatal_error ("Argument to %<-fcheck%> is not valid: %s", arg);
 616     }
 617 }
 618
 619
 620 /* Handle command-line options.  Returns 0 if unrecognized, 1 if
 621    recognized and handled.  */
 622
 623 bool
 624 gfc_handle_option (size_t scode, const char *arg, int value,
 625                    int kind ATTRIBUTE_UNUSED, location_t loc ATTRIBUTE_UNUSED,
 626                    const struct cl_option_handlers *handlers ATTRIBUTE_UNUSED)
 627 {
 628   bool result = true;
 629   enum opt_code code = (enum opt_code) scode;
 630
 631   if (gfc_cpp_handle_option (scode, arg, value) == 1)
 632     return true;
 633
 634   switch (code)
 635     {
 636     default:
 637       if (cl_options[code].flags & gfc_option_lang_mask ())
 638         break;
 639       result = false;
 640       break;
 641
 642     case OPT_Wall:
 643       handle_generated_option (&global_options, &global_options_set,
 644                                OPT_Wunused, NULL, value,
 645                                gfc_option_lang_mask (), kind, loc,
 646                                handlers, global_dc);
 647       set_Wall (value);
 648       break;
 649
 650     case OPT_Waliasing:
 651       gfc_option.warn_aliasing = value;
 652       break;
 653
 654     case OPT_Wampersand:
 655       gfc_option.warn_ampersand = value;
 656       break;
 657
 658     case OPT_Warray_temporaries:
 659       gfc_option.warn_array_temp = value;
 660       break;
 661
 662     case OPT_Wc_binding_type:
 663       gfc_option.warn_c_binding_type = value;
 664       break;
 665
 666     case OPT_Wcharacter_truncation:
 667       gfc_option.warn_character_truncation = value;
 668       break;
 669
 670     case OPT_Wcompare_reals:
 671       gfc_option.warn_compare_reals = value;
 672       break;
 673
 674     case OPT_Wconversion:
 675       gfc_option.gfc_warn_conversion = value;
 676       break;
 677
 678     case OPT_Wconversion_extra:
 679       gfc_option.warn_conversion_extra = value;
 680       break;
 681
 682     case OPT_Wextra:
 683       set_Wextra (value);
 684       break;
 685
 686     case OPT_Wfunction_elimination:
 687       gfc_option.warn_function_elimination = value;
 688       break;
 689
 690     case OPT_Wimplicit_interface:
 691       gfc_option.warn_implicit_interface = value;
 692       break;
 693
 694     case OPT_Wimplicit_procedure:
 695       gfc_option.warn_implicit_procedure = value;
 696       break;
 697
 698     case OPT_Wline_truncation:
 699       gfc_option.warn_line_truncation = value;
 700       break;
 701
 702     case OPT_Wrealloc_lhs:
 703       gfc_option.warn_realloc_lhs = value;
 704       break;
 705
 706     case OPT_Wrealloc_lhs_all:
 707       gfc_option.warn_realloc_lhs_all = value;
 708       break;
 709
 710     case OPT_Wreturn_type:
 711       warn_return_type = value;
 712       break;
 713
 714     case OPT_Wsurprising:
 715       gfc_option.warn_surprising = value;
 716       break;
 717
 718     case OPT_Wtarget_lifetime:
 719       gfc_option.warn_target_lifetime = value;
 720       break;
 721
 722     case OPT_Wunderflow:
 723       gfc_option.warn_underflow = value;
 724       break;
 725
 726     case OPT_Wintrinsic_shadow:
 727       gfc_option.warn_intrinsic_shadow = value;
 728       break;
 729
 730     case OPT_Walign_commons:
 731       gfc_option.warn_align_commons = value;
 732       break;
 733
 734     case OPT_Wreal_q_constant:
 735       gfc_option.warn_real_q_constant = value;
 736       break;
 737
 738     case OPT_Wunused_dummy_argument:
 739       gfc_option.warn_unused_dummy_argument = value;
 740       break;
 741
 742     case OPT_Wzerotrip:
 743       gfc_option.warn_zerotrip = value;
 744       break;
 745
 746     case OPT_fall_intrinsics:
 747       gfc_option.flag_all_intrinsics = 1;
 748       break;
 749
 750     case OPT_fautomatic:
 751       gfc_option.flag_automatic = value;
 752       break;
 753
 754     case OPT_fallow_leading_underscore:
 755       gfc_option.flag_allow_leading_underscore = value;
 756       break;
 757
 758     case OPT_fbackslash:
 759       gfc_option.flag_backslash = value;
 760       break;
 761
 762     case OPT_fbacktrace:
 763       gfc_option.flag_backtrace = value;
 764       break;
 765
 766     case OPT_fcheck_array_temporaries:
 767       gfc_option.rtcheck |= GFC_RTCHECK_ARRAY_TEMPS;
 768       break;
 769
 770     case OPT_fcray_pointer:
 771       gfc_option.flag_cray_pointer = value;
 772       break;
 773
 774     case OPT_ff2c:
 775       gfc_option.flag_f2c = value;
 776       break;
 777
 778     case OPT_fdollar_ok:
 779       gfc_option.flag_dollar_ok = value;
 780       break;
 781
 782     case OPT_fexternal_blas:
 783       gfc_option.flag_external_blas = value;
 784       break;
 785
 786     case OPT_fblas_matmul_limit_:
 787       gfc_option.blas_matmul_limit = value;
 788       break;
 789
 790     case OPT_fd_lines_as_code:
 791       gfc_option.flag_d_lines = 1;
 792       break;
 793
 794     case OPT_fd_lines_as_comments:
 795       gfc_option.flag_d_lines = 0;
 796       break;
 797
 798     case OPT_fdump_fortran_original:
 799     case OPT_fdump_parse_tree:
 800       gfc_option.dump_fortran_original = value;
 801       break;
 802
 803     case OPT_fdump_fortran_optimized:
 804       gfc_option.dump_fortran_optimized = value;
 805       break;
 806
 807     case OPT_ffixed_form:
 808       gfc_option.source_form = FORM_FIXED;
 809       break;
 810
 811     case OPT_ffixed_line_length_none:
 812       gfc_option.fixed_line_length = 0;
 813       break;
 814
 815     case OPT_ffixed_line_length_:
 816       if (value != 0 && value < 7)
 817         gfc_fatal_error ("Fixed line length must be at least seven");
 818       gfc_option.fixed_line_length = value;
 819       break;
 820
 821     case OPT_ffree_form:
 822       gfc_option.source_form = FORM_FREE;
 823       break;
 824
 825     case OPT_fopenmp:
 826       gfc_option.gfc_flag_openmp = value;
 827       break;
 828
 829     case OPT_fopenmp_simd:
 830       gfc_option.gfc_flag_openmp_simd = value;
 831       break;
 832
 833     case OPT_ffree_line_length_none:
 834       gfc_option.free_line_length = 0;
 835       break;
 836
 837     case OPT_ffree_line_length_:
 838       if (value != 0 && value < 4)
 839         gfc_fatal_error ("Free line length must be at least three");
 840       gfc_option.free_line_length = value;
 841       break;
 842
 843     case OPT_funderscoring:
 844       gfc_option.flag_underscoring = value;
 845       break;
 846
 847     case OPT_fsecond_underscore:
 848       gfc_option.flag_second_underscore = value;
 849       break;
 850
 851     case OPT_static_libgfortran:
 852 #ifndef HAVE_LD_STATIC_DYNAMIC
 853       gfc_fatal_error ("%<-static-libgfortran%> is not supported in this "
 854                        "configuration");
 855 #endif
 856       break;
 857
 858     case OPT_fimplicit_none:
 859       gfc_option.flag_implicit_none = value;
 860       break;
 861
 862     case OPT_fintrinsic_modules_path:
 863     case OPT_fintrinsic_modules_path_:
 864
 865       /* This is needed because omp_lib.h is in a directory together
 866          with intrinsic modules.  Do no warn because during testing
 867          without an installed compiler, we would get lots of bogus
 868          warnings for a missing include directory.  */
 869       gfc_add_include_path (arg, false, false, false);
 870
 871       gfc_add_intrinsic_modules_path (arg);
 872       break;
 873
 874     case OPT_fmax_array_constructor_:
 875       gfc_option.flag_max_array_constructor = value > 65535 ? value : 65535;
 876       break;
 877
 878     case OPT_fmax_stack_var_size_:
 879       gfc_option.flag_max_stack_var_size = value;
 880       break;
 881
 882     case OPT_fstack_arrays:
 883       gfc_option.flag_stack_arrays = value;
 884       break;
 885
 886     case OPT_fmodule_private:
 887       gfc_option.flag_module_private = value;
 888       break;
 889
 890     case OPT_frange_check:
 891       gfc_option.flag_range_check = value;
 892       break;
 893
 894     case OPT_fpack_derived:
 895       gfc_option.flag_pack_derived = value;
 896       break;
 897
 898     case OPT_frepack_arrays:
 899       gfc_option.flag_repack_arrays = value;
 900       break;
 901
 902     case OPT_fpreprocessed:
 903       gfc_option.flag_preprocessed = value;
 904       break;
 905
 906     case OPT_fmax_identifier_length_:
 907       if (value > GFC_MAX_SYMBOL_LEN)
 908         gfc_fatal_error ("Maximum supported identifier length is %d",
 909                          GFC_MAX_SYMBOL_LEN);
 910       gfc_option.max_identifier_length = value;
 911       break;
 912
 913     case OPT_fdefault_integer_8:
 914       gfc_option.flag_default_integer = value;
 915       break;
 916
 917     case OPT_fdefault_real_8:
 918       gfc_option.flag_default_real = value;
 919       break;
 920
 921     case OPT_fdefault_double_8:
 922       gfc_option.flag_default_double = value;
 923       break;
 924
 925     case OPT_finteger_4_integer_8:
 926       gfc_option.flag_integer4_kind = 8;
 927       break;
 928
 929     case OPT_freal_4_real_8:
 930       gfc_option.flag_real4_kind = 8;
 931       break;
 932
 933     case OPT_freal_4_real_10:
 934       gfc_option.flag_real4_kind = 10;
 935       break;
 936
 937     case OPT_freal_4_real_16:
 938       gfc_option.flag_real4_kind = 16;
 939       break;
 940
 941     case OPT_freal_8_real_4:
 942       gfc_option.flag_real8_kind = 4;
 943       break;
 944
 945     case OPT_freal_8_real_10:
 946       gfc_option.flag_real8_kind = 10;
 947       break;
 948
 949     case OPT_freal_8_real_16:
 950       gfc_option.flag_real8_kind = 16;
 951       break;
 952
 953     case OPT_finit_local_zero:
 954       gfc_option.flag_init_integer = GFC_INIT_INTEGER_ON;
 955       gfc_option.flag_init_integer_value = 0;
 956       gfc_option.flag_init_real = GFC_INIT_REAL_ZERO;
 957       gfc_option.flag_init_logical = GFC_INIT_LOGICAL_FALSE;
 958       gfc_option.flag_init_character = GFC_INIT_CHARACTER_ON;
 959       gfc_option.flag_init_character_value = (char)0;
 960       break;
 961
 962     case OPT_finit_logical_:
 963       if (!strcasecmp (arg, "false"))
 964         gfc_option.flag_init_logical = GFC_INIT_LOGICAL_FALSE;
 965       else if (!strcasecmp (arg, "true"))
 966         gfc_option.flag_init_logical = GFC_INIT_LOGICAL_TRUE;
 967       else
 968         gfc_fatal_error ("Unrecognized option to %<-finit-logical%>: %s",
 969                          arg);
 970       break;
 971
 972     case OPT_finit_real_:
 973       if (!strcasecmp (arg, "zero"))
 974         gfc_option.flag_init_real = GFC_INIT_REAL_ZERO;
 975       else if (!strcasecmp (arg, "nan"))
 976         gfc_option.flag_init_real = GFC_INIT_REAL_NAN;
 977       else if (!strcasecmp (arg, "snan"))
 978         gfc_option.flag_init_real = GFC_INIT_REAL_SNAN;
 979       else if (!strcasecmp (arg, "inf"))
 980         gfc_option.flag_init_real = GFC_INIT_REAL_INF;
 981       else if (!strcasecmp (arg, "-inf"))
 982         gfc_option.flag_init_real = GFC_INIT_REAL_NEG_INF;
 983       else
 984         gfc_fatal_error ("Unrecognized option to %<-finit-real%>: %s",
 985                          arg);
 986       break;
 987
 988     case OPT_finit_integer_:
 989       gfc_option.flag_init_integer = GFC_INIT_INTEGER_ON;
 990       gfc_option.flag_init_integer_value = atoi (arg);
 991       break;
 992
 993     case OPT_finit_character_:
 994       if (value >= 0 && value <= 127)
 995         {
 996           gfc_option.flag_init_character = GFC_INIT_CHARACTER_ON;
 997           gfc_option.flag_init_character_value = (char)value;
 998         }
 999       else
1000         gfc_fatal_error ("The value of n in %<-finit-character=n%> must be "
1001                          "between 0 and 127");
1002       break;
1003
1004     case OPT_I:
1005       gfc_add_include_path (arg, true, false, true);
1006       break;
1007
1008     case OPT_J:
1009       gfc_handle_module_path_options (arg);
1010       break;
1011
1012     case OPT_fsign_zero:
1013       gfc_option.flag_sign_zero = value;
1014       break;
1015
1016     case OPT_ffpe_trap_:
1017       gfc_handle_fpe_option (arg, true);
1018       break;
1019
1020     case OPT_ffpe_summary_:
1021       gfc_handle_fpe_option (arg, false);
1022       break;
1023
1024     case OPT_std_f95:
1025       gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95 | GFC_STD_F77
1026                              | GFC_STD_F2008_OBS;
1027       gfc_option.warn_std = GFC_STD_F95_OBS;
1028       gfc_option.max_continue_fixed = 19;
1029       gfc_option.max_continue_free = 39;
1030       gfc_option.max_identifier_length = 31;
1031       gfc_option.warn_ampersand = 1;
1032       warn_tabs = 1;
1033       break;
1034
1035     case OPT_std_f2003:
1036       gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
1037         | GFC_STD_F2003 | GFC_STD_F95 | GFC_STD_F2008_OBS;
1038       gfc_option.warn_std = GFC_STD_F95_OBS;
1039       gfc_option.max_identifier_length = 63;
1040       gfc_option.warn_ampersand = 1;
1041       warn_tabs = 1;
1042       break;
1043
1044     case OPT_std_f2008:
1045       gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
1046         | GFC_STD_F2003 | GFC_STD_F95 | GFC_STD_F2008 | GFC_STD_F2008_OBS;
1047       gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F2008_OBS;
1048       gfc_option.max_identifier_length = 63;
1049       gfc_option.warn_ampersand = 1;
1050       warn_tabs = 1;
1051       break;
1052
1053     case OPT_std_f2008ts:
1054       gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
1055         | GFC_STD_F2003 | GFC_STD_F95 | GFC_STD_F2008 | GFC_STD_F2008_OBS
1056         | GFC_STD_F2008_TS;
1057       gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F2008_OBS;
1058       gfc_option.max_identifier_length = 63;
1059       gfc_option.warn_ampersand = 1;
1060       warn_tabs = 1;
1061       break;
1062
1063     case OPT_std_gnu:
1064       set_default_std_flags ();
1065       break;
1066
1067     case OPT_std_legacy:
1068       set_default_std_flags ();
1069       gfc_option.warn_std = 0;
1070       break;
1071
1072     case OPT_Wintrinsics_std:
1073       gfc_option.warn_intrinsics_std = value;
1074       break;
1075
1076     case OPT_fshort_enums:
1077       /* Handled in language-independent code.  */
1078       break;
1079
1080     case OPT_fconvert_little_endian:
1081       gfc_option.convert = GFC_CONVERT_LITTLE;
1082       break;
1083
1084     case OPT_fconvert_big_endian:
1085       gfc_option.convert = GFC_CONVERT_BIG;
1086       break;
1087
1088     case OPT_fconvert_native:
1089       gfc_option.convert = GFC_CONVERT_NATIVE;
1090       break;
1091
1092     case OPT_fconvert_swap:
1093       gfc_option.convert = GFC_CONVERT_SWAP;
1094       break;
1095
1096     case OPT_frecord_marker_4:
1097       gfc_option.record_marker = 4;
1098       break;
1099
1100     case OPT_frecord_marker_8:
1101       gfc_option.record_marker = 8;
1102       break;
1103
1104     case OPT_fmax_subrecord_length_:
1105       if (value > MAX_SUBRECORD_LENGTH)
1106         gfc_fatal_error ("Maximum subrecord length cannot exceed %d",
1107                          MAX_SUBRECORD_LENGTH);
1108
1109       gfc_option.max_subrecord_length = value;
1110       break;
1111
1112     case OPT_frecursive:
1113       gfc_option.flag_recursive = value;
1114       break;
1115
1116     case OPT_falign_commons:
1117       gfc_option.flag_align_commons = value;
1118       break;
1119
1120     case  OPT_faggressive_function_elimination:
1121       gfc_option.flag_aggressive_function_elimination = value;
1122       break;
1123
1124     case OPT_ffrontend_optimize:
1125       gfc_option.flag_frontend_optimize = value;
1126       break;
1127
1128     case OPT_fprotect_parens:
1129       gfc_option.flag_protect_parens = value;
1130       break;
1131
1132     case OPT_frealloc_lhs:
1133       gfc_option.flag_realloc_lhs = value;
1134       break;
1135
1136     case OPT_fcheck_:
1137       gfc_handle_runtime_check_option (arg);
1138       break;
1139
1140     case OPT_fcoarray_:
1141       gfc_handle_coarray_option (arg);
1142       break;
1143     }
1144
1145   Fortran_handle_option_auto (&global_options, &global_options_set,
1146                               scode, arg, value,
1147                               gfc_option_lang_mask (), kind,
1148                               loc, handlers, global_dc);
1149   return result;
1150 }
1151
1152
1153 /* Return a string with the options passed to the compiler; used for
1154    Fortran's compiler_options() intrinsic.  */
1155
1156 char *
1157 gfc_get_option_string (void)
1158 {
1159   unsigned j;
1160   size_t len, pos;
1161   char *result;
1162
1163   /* Allocate and return a one-character string with '\0'.  */
1164   if (!save_decoded_options_count)
1165     return XCNEWVEC (char, 1);
1166
1167   /* Determine required string length.  */
1168
1169   len = 0;
1170   for (j = 1; j < save_decoded_options_count; j++)
1171     {
1172       switch (save_decoded_options[j].opt_index)
1173         {
1174         case OPT_o:
1175         case OPT_d:
1176         case OPT_dumpbase:
1177         case OPT_dumpdir:
1178         case OPT_auxbase:
1179         case OPT_quiet:
1180         case OPT_version:
1181         case OPT_fintrinsic_modules_path:
1182         case OPT_fintrinsic_modules_path_:
1183           /* Ignore these.  */
1184           break;
1185         default:
1186           /* Ignore file names.  */
1187           if (save_decoded_options[j].orig_option_with_args_text[0] == '-')
1188             len += 1
1189                  + strlen (save_decoded_options[j].orig_option_with_args_text);
1190         }
1191     }
1192
1193   result = XCNEWVEC (char, len);
1194
1195   pos = 0;
1196   for (j = 1; j < save_decoded_options_count; j++)
1197     {
1198       switch (save_decoded_options[j].opt_index)
1199         {
1200         case OPT_o:
1201         case OPT_d:
1202         case OPT_dumpbase:
1203         case OPT_dumpdir:
1204         case OPT_auxbase:
1205         case OPT_quiet:
1206         case OPT_version:
1207         case OPT_fintrinsic_modules_path:
1208         case OPT_fintrinsic_modules_path_:
1209           /* Ignore these.  */
1210           continue;
1211
1212         case OPT_cpp_:
1213           /* Use "-cpp" rather than "-cpp=<temporary file>".  */
1214           len = 4;
1215           break;
1216
1217         default:
1218           /* Ignore file names.  */
1219           if (save_decoded_options[j].orig_option_with_args_text[0] != '-')
1220             continue;
1221
1222           len = strlen (save_decoded_options[j].orig_option_with_args_text);
1223         }
1224
1225       memcpy (&result[pos], save_decoded_options[j].orig_option_with_args_text, len);
1226       pos += len;
1227       result[pos++] = ' ';
1228     }
1229
1230   result[--pos] = '\0';
1231   return result;
1232 }