gcc/fortran/options.c

   1 /* Parse and display command line options.
   2    Copyright (C) 2000-2021 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 "target.h"
  25 #include "tree.h"
  26 #include "gfortran.h"
  27 #include "diagnostic.h" /* For global_dc.  */
  28 #include "opts.h"
  29 #include "toplev.h"  /* For save_decoded_options.  */
  30 #include "cpp.h"
  31 #include "langhooks.h"
  32
  33 gfc_option_t gfc_option;
  34
  35 #define SET_FLAG(flag, condition, on_value, off_value) \
  36   do \
  37     { \
  38       if (condition) \
  39         flag = (on_value); \
  40       else \
  41         flag = (off_value); \
  42     } while (0)
  43
  44 #define SET_BITFLAG2(m) m
  45
  46 #define SET_BITFLAG(flag, condition, value) \
  47   SET_BITFLAG2 (SET_FLAG (flag, condition, (flag | (value)), (flag & ~(value))))
  48
  49
  50 /* Set flags that control warnings and errors for different
  51    Fortran standards to their default values.  Keep in sync with
  52    libgfortran/runtime/compile_options.c (init_compile_options).  */
  53
  54 static void
  55 set_default_std_flags (void)
  56 {
  57   gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
  58     | GFC_STD_F2003 | GFC_STD_F2008 | GFC_STD_F95 | GFC_STD_F77
  59     | GFC_STD_F2008_OBS | GFC_STD_GNU | GFC_STD_LEGACY
  60     | GFC_STD_F2018 | GFC_STD_F2018_DEL | GFC_STD_F2018_OBS;
  61   gfc_option.warn_std = GFC_STD_F2018_DEL | GFC_STD_F95_DEL | GFC_STD_LEGACY;
  62 }
  63
  64 /* Set (or unset) the DEC extension flags.  */
  65
  66 static void
  67 set_dec_flags (int value)
  68 {
  69   /* Set (or unset) other DEC compatibility extensions.  */
  70   SET_BITFLAG (flag_dollar_ok, value, value);
  71   SET_BITFLAG (flag_cray_pointer, value, value);
  72   SET_BITFLAG (flag_dec_structure, value, value);
  73   SET_BITFLAG (flag_dec_intrinsic_ints, value, value);
  74   SET_BITFLAG (flag_dec_static, value, value);
  75   SET_BITFLAG (flag_dec_math, value, value);
  76   SET_BITFLAG (flag_dec_include, value, value);
  77   SET_BITFLAG (flag_dec_format_defaults, value, value);
  78   SET_BITFLAG (flag_dec_blank_format_item, value, value);
  79   SET_BITFLAG (flag_dec_char_conversions, value, value);
  80 }
  81
  82 /* Finalize DEC flags.  */
  83
  84 static void
  85 post_dec_flags (int value)
  86 {
  87   /* Don't warn for legacy code if -fdec is given; however, setting -fno-dec
  88      does not force these warnings.  We make one final determination on this
  89      at the end because -std= is always set first; thus, we can avoid
  90      clobbering the user's desired standard settings in gfc_handle_option
  91      e.g. when -fdec and -fno-dec are both given.  */
  92   if (value)
  93     {
  94       gfc_option.allow_std |= GFC_STD_F95_OBS | GFC_STD_F95_DEL
  95         | GFC_STD_GNU | GFC_STD_LEGACY;
  96       gfc_option.warn_std &= ~(GFC_STD_LEGACY | GFC_STD_F95_DEL);
  97     }
  98 }
  99
 100 /* Enable (or disable) -finit-local-zero.  */
 101
 102 static void
 103 set_init_local_zero (int value)
 104 {
 105   gfc_option.flag_init_integer_value = 0;
 106   gfc_option.flag_init_character_value = (char)0;
 107
 108   SET_FLAG (gfc_option.flag_init_integer, value, GFC_INIT_INTEGER_ON,
 109             GFC_INIT_INTEGER_OFF);
 110   SET_FLAG (gfc_option.flag_init_logical, value, GFC_INIT_LOGICAL_FALSE,
 111             GFC_INIT_LOGICAL_OFF);
 112   SET_FLAG (gfc_option.flag_init_character, value, GFC_INIT_CHARACTER_ON,
 113             GFC_INIT_CHARACTER_OFF);
 114   SET_FLAG (flag_init_real, value, GFC_INIT_REAL_ZERO, GFC_INIT_REAL_OFF);
 115 }
 116
 117 /* Return language mask for Fortran options.  */
 118
 119 unsigned int
 120 gfc_option_lang_mask (void)
 121 {
 122   return CL_Fortran;
 123 }
 124
 125 /* Initialize options structure OPTS.  */
 126
 127 void
 128 gfc_init_options_struct (struct gcc_options *opts)
 129 {
 130   opts->x_flag_errno_math = 0;
 131   opts->frontend_set_flag_errno_math = true;
 132   opts->x_flag_associative_math = -1;
 133   opts->frontend_set_flag_associative_math = true;
 134 }
 135
 136 /* Get ready for options handling. Keep in sync with
 137    libgfortran/runtime/compile_options.c (init_compile_options).  */
 138
 139 void
 140 gfc_init_options (unsigned int decoded_options_count,
 141                   struct cl_decoded_option *decoded_options)
 142 {
 143   gfc_source_file = NULL;
 144   gfc_option.module_dir = NULL;
 145   gfc_option.source_form = FORM_UNKNOWN;
 146   gfc_option.max_continue_fixed = 255;
 147   gfc_option.max_continue_free = 255;
 148   gfc_option.max_identifier_length = GFC_MAX_SYMBOL_LEN;
 149   gfc_option.max_errors = 25;
 150
 151   gfc_option.flag_preprocessed = 0;
 152   gfc_option.flag_d_lines = -1;
 153   set_init_local_zero (0);
 154
 155   gfc_option.fpe = 0;
 156   /* All except GFC_FPE_INEXACT.  */
 157   gfc_option.fpe_summary = GFC_FPE_INVALID | GFC_FPE_DENORMAL
 158                            | GFC_FPE_ZERO | GFC_FPE_OVERFLOW
 159                            | GFC_FPE_UNDERFLOW;
 160   gfc_option.rtcheck = 0;
 161
 162   /* ??? Wmissing-include-dirs is disabled by default in C/C++ but
 163      enabled by default in Fortran.  Ideally, we should express this
 164      in .opt, but that is not supported yet.  */
 165   SET_OPTION_IF_UNSET (&global_options, &global_options_set,
 166                        cpp_warn_missing_include_dirs, 1);
 167
 168   set_dec_flags (0);
 169
 170   set_default_std_flags ();
 171
 172   /* Initialize cpp-related options.  */
 173   gfc_cpp_init_options (decoded_options_count, decoded_options);
 174   gfc_diagnostics_init ();
 175 }
 176
 177
 178 /* Determine the source form from the filename extension.  We assume
 179    case insensitivity.  */
 180
 181 static gfc_source_form
 182 form_from_filename (const char *filename)
 183 {
 184   static const struct
 185   {
 186     const char *extension;
 187     gfc_source_form form;
 188   }
 189   exttype[] =
 190   {
 191     {
 192     ".f90", FORM_FREE}
 193     ,
 194     {
 195     ".f95", FORM_FREE}
 196     ,
 197     {
 198     ".f03", FORM_FREE}
 199     ,
 200     {
 201     ".f08", FORM_FREE}
 202     ,
 203     {
 204     ".f", FORM_FIXED}
 205     ,
 206     {
 207     ".for", FORM_FIXED}
 208     ,
 209     {
 210     ".ftn", FORM_FIXED}
 211     ,
 212     {
 213     "", FORM_UNKNOWN}
 214   };            /* sentinel value */
 215
 216   gfc_source_form f_form;
 217   const char *fileext;
 218   int i;
 219
 220   /* Find end of file name.  Note, filename is either a NULL pointer or
 221      a NUL terminated string.  */
 222   i = 0;
 223   while (filename[i] != '\0')
 224     i++;
 225
 226   /* Find last period.  */
 227   while (i >= 0 && (filename[i] != '.'))
 228     i--;
 229
 230   /* Did we see a file extension?  */
 231   if (i < 0)
 232     return FORM_UNKNOWN; /* Nope  */
 233
 234   /* Get file extension and compare it to others.  */
 235   fileext = &(filename[i]);
 236
 237   i = -1;
 238   f_form = FORM_UNKNOWN;
 239   do
 240     {
 241       i++;
 242       if (strcasecmp (fileext, exttype[i].extension) == 0)
 243         {
 244           f_form = exttype[i].form;
 245           break;
 246         }
 247     }
 248   while (exttype[i].form != FORM_UNKNOWN);
 249
 250   return f_form;
 251 }
 252
 253
 254 /* Finalize commandline options.  */
 255
 256 bool
 257 gfc_post_options (const char **pfilename)
 258 {
 259   const char *filename = *pfilename, *canon_source_file = NULL;
 260   char *source_path;
 261   int i;
 262
 263   /* Finalize DEC flags.  */
 264   post_dec_flags (flag_dec);
 265
 266   /* Excess precision other than "fast" requires front-end
 267      support.  */
 268   if (flag_excess_precision == EXCESS_PRECISION_STANDARD)
 269     sorry ("%<-fexcess-precision=standard%> for Fortran");
 270   flag_excess_precision = EXCESS_PRECISION_FAST;
 271
 272   /* Fortran allows associative math - but we cannot reassociate if
 273      we want traps or signed zeros. Cf. also flag_protect_parens.  */
 274   if (flag_associative_math == -1)
 275     flag_associative_math = (!flag_trapping_math && !flag_signed_zeros);
 276
 277   if (flag_protect_parens == -1)
 278     flag_protect_parens = !optimize_fast;
 279
 280   /* -Ofast sets implies -fstack-arrays unless an explicit size is set for
 281      stack arrays.  */
 282   if (flag_stack_arrays == -1 && flag_max_stack_var_size == -2)
 283     flag_stack_arrays = optimize_fast;
 284
 285   /* By default, disable (re)allocation during assignment for -std=f95,
 286      and enable it for F2003/F2008/GNU/Legacy.  */
 287   if (flag_realloc_lhs == -1)
 288     {
 289       if (gfc_option.allow_std & GFC_STD_F2003)
 290         flag_realloc_lhs = 1;
 291       else
 292         flag_realloc_lhs = 0;
 293     }
 294
 295   /* -fbounds-check is equivalent to -fcheck=bounds */
 296   if (flag_bounds_check)
 297     gfc_option.rtcheck |= GFC_RTCHECK_BOUNDS;
 298
 299   if (flag_compare_debug)
 300     flag_dump_fortran_original = 0;
 301
 302   /* Make -fmax-errors visible to gfortran's diagnostic machinery.  */
 303   if (global_options_set.x_flag_max_errors)
 304     gfc_option.max_errors = flag_max_errors;
 305
 306   /* Verify the input file name.  */
 307   if (!filename || strcmp (filename, "-") == 0)
 308     {
 309       filename = "";
 310     }
 311
 312   if (gfc_option.flag_preprocessed)
 313     {
 314       /* For preprocessed files, if the first tokens are of the form # NUM.
 315          handle the directives so we know the original file name.  */
 316       gfc_source_file = gfc_read_orig_filename (filename, &canon_source_file);
 317       if (gfc_source_file == NULL)
 318         gfc_source_file = filename;
 319       else
 320         *pfilename = gfc_source_file;
 321     }
 322   else
 323     gfc_source_file = filename;
 324
 325   if (canon_source_file == NULL)
 326     canon_source_file = gfc_source_file;
 327
 328   /* Adds the path where the source file is to the list of include files.  */
 329
 330   i = strlen (canon_source_file);
 331   while (i > 0 && !IS_DIR_SEPARATOR (canon_source_file[i]))
 332     i--;
 333
 334   if (i != 0)
 335     {
 336       source_path = (char *) alloca (i + 1);
 337       memcpy (source_path, canon_source_file, i);
 338       source_path[i] = 0;
 339       gfc_add_include_path (source_path, true, true, true);
 340     }
 341   else
 342     gfc_add_include_path (".", true, true, true);
 343
 344   if (canon_source_file != gfc_source_file)
 345     free (CONST_CAST (char *, canon_source_file));
 346
 347   /* Decide which form the file will be read in as.  */
 348
 349   if (gfc_option.source_form != FORM_UNKNOWN)
 350     gfc_current_form = gfc_option.source_form;
 351   else
 352     {
 353       gfc_current_form = form_from_filename (filename);
 354
 355       if (gfc_current_form == FORM_UNKNOWN)
 356         {
 357           gfc_current_form = FORM_FREE;
 358           main_input_filename = filename;
 359           gfc_warning_now (0, "Reading file %qs as free form",
 360                            (filename[0] == '\0') ? "<stdin>" : filename);
 361         }
 362     }
 363
 364   /* If the user specified -fd-lines-as-{code|comments} verify that we're
 365      in fixed form.  */
 366   if (gfc_current_form == FORM_FREE)
 367     {
 368       if (gfc_option.flag_d_lines == 0)
 369         gfc_warning_now (0, "%<-fd-lines-as-comments%> has no effect "
 370                            "in free form");
 371       else if (gfc_option.flag_d_lines == 1)
 372         gfc_warning_now (0, "%<-fd-lines-as-code%> has no effect in free form");
 373
 374       if (warn_line_truncation == -1)
 375           warn_line_truncation = 1;
 376
 377       /* Enable -Werror=line-truncation when -Werror and -Wno-error have
 378          not been set.  */
 379       if (warn_line_truncation && !global_options_set.x_warnings_are_errors
 380           && (global_dc->classify_diagnostic[OPT_Wline_truncation] ==
 381               DK_UNSPECIFIED))
 382         diagnostic_classify_diagnostic (global_dc, OPT_Wline_truncation,
 383                                         DK_ERROR, UNKNOWN_LOCATION);
 384     }
 385   else
 386     {
 387       /* With -fdec, set -fd-lines-as-comments by default in fixed form.  */
 388       if (flag_dec && gfc_option.flag_d_lines == -1)
 389         gfc_option.flag_d_lines = 0;
 390
 391       if (warn_line_truncation == -1)
 392         warn_line_truncation = 0;
 393     }
 394
 395   /* If -pedantic, warn about the use of GNU extensions.  */
 396   if (pedantic && (gfc_option.allow_std & GFC_STD_GNU) != 0)
 397     gfc_option.warn_std |= GFC_STD_GNU;
 398   /* -std=legacy -pedantic is effectively -std=gnu.  */
 399   if (pedantic && (gfc_option.allow_std & GFC_STD_LEGACY) != 0)
 400     gfc_option.warn_std |= GFC_STD_F95_OBS | GFC_STD_F95_DEL | GFC_STD_LEGACY;
 401
 402   /* If the user didn't explicitly specify -f(no)-second-underscore we
 403      use it if we're trying to be compatible with f2c, and not
 404      otherwise.  */
 405   if (flag_second_underscore == -1)
 406     flag_second_underscore = flag_f2c;
 407
 408   if (!flag_automatic && flag_max_stack_var_size != -2
 409       && flag_max_stack_var_size != 0)
 410     gfc_warning_now (0, "Flag %<-fno-automatic%> overwrites %<-fmax-stack-var-size=%d%>",
 411                      flag_max_stack_var_size);
 412   else if (!flag_automatic && flag_recursive)
 413     gfc_warning_now (OPT_Woverwrite_recursive, "Flag %<-fno-automatic%> "
 414                      "overwrites %<-frecursive%>");
 415   else if (!flag_automatic && (flag_openmp || flag_openacc))
 416     gfc_warning_now (0, "Flag %<-fno-automatic%> overwrites %<-frecursive%> "
 417                      "implied by %qs", flag_openmp ? "-fopenmp" : "-fopenacc");
 418   else if (flag_max_stack_var_size != -2 && flag_recursive)
 419     gfc_warning_now (0, "Flag %<-frecursive%> overwrites %<-fmax-stack-var-size=%d%>",
 420                      flag_max_stack_var_size);
 421   else if (flag_max_stack_var_size != -2 && (flag_openmp || flag_openacc))
 422     gfc_warning_now (0, "Flag %<-fmax-stack-var-size=%d%> overwrites "
 423                      "%<-frecursive%> implied by %qs", flag_max_stack_var_size,
 424                      flag_openmp ? "-fopenmp" : "-fopenacc");
 425
 426   /* Implement -frecursive as -fmax-stack-var-size=-1.  */
 427   if (flag_recursive)
 428     flag_max_stack_var_size = -1;
 429
 430   /* Implied -frecursive; implemented as -fmax-stack-var-size=-1.  */
 431   if (flag_max_stack_var_size == -2 && flag_automatic
 432       && (flag_openmp || flag_openacc))
 433     {
 434       flag_recursive = 1;
 435       flag_max_stack_var_size = -1;
 436     }
 437
 438   /* Set flag_stack_arrays correctly.  */
 439   if (flag_stack_arrays == -1)
 440     flag_stack_arrays = 0;
 441
 442   /* Set default.  */
 443   if (flag_max_stack_var_size == -2)
 444     flag_max_stack_var_size = 65536;
 445
 446   /* Implement -fno-automatic as -fmax-stack-var-size=0.  */
 447   if (!flag_automatic)
 448     flag_max_stack_var_size = 0;
 449
 450   /* If the user did not specify an inline matmul limit, inline up to the BLAS
 451      limit or up to 30 if no external BLAS is specified.  */
 452
 453   if (flag_inline_matmul_limit < 0)
 454     {
 455       if (flag_external_blas)
 456         flag_inline_matmul_limit = flag_blas_matmul_limit;
 457       else
 458         flag_inline_matmul_limit = 30;
 459     }
 460
 461   /* Optimization implies front end optimization, unless the user
 462      specified it directly.  */
 463
 464   if (flag_frontend_optimize == -1)
 465     flag_frontend_optimize = optimize && !optimize_debug;
 466
 467   /* Same for front end loop interchange.  */
 468
 469   if (flag_frontend_loop_interchange == -1)
 470     flag_frontend_loop_interchange = optimize;
 471
 472   /* Do inline packing by default if optimizing, but not if
 473      optimizing for size.  */
 474   if (flag_inline_arg_packing == -1)
 475     flag_inline_arg_packing = optimize && !optimize_size;
 476
 477   if (flag_max_array_constructor < 65535)
 478     flag_max_array_constructor = 65535;
 479
 480   if (flag_fixed_line_length != 0 && flag_fixed_line_length < 7)
 481     gfc_fatal_error ("Fixed line length must be at least seven");
 482
 483   if (flag_free_line_length != 0 && flag_free_line_length < 4)
 484     gfc_fatal_error ("Free line length must be at least three");
 485
 486   if (flag_max_subrecord_length > MAX_SUBRECORD_LENGTH)
 487     gfc_fatal_error ("Maximum subrecord length cannot exceed %d",
 488                      MAX_SUBRECORD_LENGTH);
 489
 490   gfc_cpp_post_options ();
 491
 492   if (gfc_option.allow_std & GFC_STD_F2008)
 493     lang_hooks.name = "GNU Fortran2008";
 494   else if (gfc_option.allow_std & GFC_STD_F2003)
 495     lang_hooks.name = "GNU Fortran2003";
 496
 497   return gfc_cpp_preprocess_only ();
 498 }
 499
 500
 501 static void
 502 gfc_handle_module_path_options (const char *arg)
 503 {
 504
 505   if (gfc_option.module_dir != NULL)
 506     gfc_fatal_error ("gfortran: Only one %<-J%> option allowed");
 507
 508   gfc_option.module_dir = XCNEWVEC (char, strlen (arg) + 2);
 509   strcpy (gfc_option.module_dir, arg);
 510
 511   gfc_add_include_path (gfc_option.module_dir, true, false, true);
 512
 513   strcat (gfc_option.module_dir, "/");
 514 }
 515
 516
 517 /* Handle options -ffpe-trap= and -ffpe-summary=.  */
 518
 519 static void
 520 gfc_handle_fpe_option (const char *arg, bool trap)
 521 {
 522   int result, pos = 0, n;
 523   /* precision is a backwards compatibility alias for inexact.  */
 524   static const char * const exception[] = { "invalid", "denormal", "zero",
 525                                             "overflow", "underflow",
 526                                             "inexact", "precision", NULL };
 527   static const int opt_exception[] = { GFC_FPE_INVALID, GFC_FPE_DENORMAL,
 528                                        GFC_FPE_ZERO, GFC_FPE_OVERFLOW,
 529                                        GFC_FPE_UNDERFLOW, GFC_FPE_INEXACT,
 530                                        GFC_FPE_INEXACT,
 531                                        0 };
 532
 533   /* As the default for -ffpe-summary= is nonzero, set it to 0.  */
 534   if (!trap)
 535     gfc_option.fpe_summary = 0;
 536
 537   while (*arg)
 538     {
 539       while (*arg == ',')
 540         arg++;
 541
 542       while (arg[pos] && arg[pos] != ',')
 543         pos++;
 544
 545       result = 0;
 546       if (!trap && strncmp ("none", arg, pos) == 0)
 547         {
 548           gfc_option.fpe_summary = 0;
 549           arg += pos;
 550           pos = 0;
 551           continue;
 552         }
 553       else if (!trap && strncmp ("all", arg, pos) == 0)
 554         {
 555           gfc_option.fpe_summary = GFC_FPE_INVALID | GFC_FPE_DENORMAL
 556                                    | GFC_FPE_ZERO | GFC_FPE_OVERFLOW
 557                                    | GFC_FPE_UNDERFLOW | GFC_FPE_INEXACT;
 558           arg += pos;
 559           pos = 0;
 560           continue;
 561         }
 562       else
 563         for (n = 0; exception[n] != NULL; n++)
 564           {
 565           if (exception[n] && strncmp (exception[n], arg, pos) == 0)
 566             {
 567               if (trap)
 568                 gfc_option.fpe |= opt_exception[n];
 569               else
 570                 gfc_option.fpe_summary |= opt_exception[n];
 571               arg += pos;
 572               pos = 0;
 573               result = 1;
 574               break;
 575             }
 576           }
 577       if (!result && !trap)
 578         gfc_fatal_error ("Argument to %<-ffpe-trap%> is not valid: %s", arg);
 579       else if (!result)
 580         gfc_fatal_error ("Argument to %<-ffpe-summary%> is not valid: %s", arg);
 581
 582     }
 583 }
 584
 585
 586 static void
 587 gfc_handle_runtime_check_option (const char *arg)
 588 {
 589   int result, pos = 0, n;
 590   static const char * const optname[] = { "all", "bounds", "array-temps",
 591                                           "recursion", "do", "pointer",
 592                                           "mem", "bits", NULL };
 593   static const int optmask[] = { GFC_RTCHECK_ALL, GFC_RTCHECK_BOUNDS,
 594                                  GFC_RTCHECK_ARRAY_TEMPS,
 595                                  GFC_RTCHECK_RECURSION, GFC_RTCHECK_DO,
 596                                  GFC_RTCHECK_POINTER, GFC_RTCHECK_MEM,
 597                                  GFC_RTCHECK_BITS, 0 };
 598
 599   while (*arg)
 600     {
 601       while (*arg == ',')
 602         arg++;
 603
 604       while (arg[pos] && arg[pos] != ',')
 605         pos++;
 606
 607       result = 0;
 608       for (n = 0; optname[n] != NULL; n++)
 609         {
 610           if (optname[n] && strncmp (optname[n], arg, pos) == 0)
 611             {
 612               gfc_option.rtcheck |= optmask[n];
 613               arg += pos;
 614               pos = 0;
 615               result = 1;
 616               break;
 617             }
 618           else if (optname[n] && pos > 3 && startswith (arg, "no-")
 619                    && strncmp (optname[n], arg+3, pos-3) == 0)
 620             {
 621               gfc_option.rtcheck &= ~optmask[n];
 622               arg += pos;
 623               pos = 0;
 624               result = 1;
 625               break;
 626             }
 627         }
 628       if (!result)
 629         gfc_fatal_error ("Argument to %<-fcheck%> is not valid: %s", arg);
 630     }
 631 }
 632
 633
 634 /* Handle command-line options.  Returns 0 if unrecognized, 1 if
 635    recognized and handled.  */
 636
 637 bool
 638 gfc_handle_option (size_t scode, const char *arg, HOST_WIDE_INT value,
 639                    int kind ATTRIBUTE_UNUSED, location_t loc ATTRIBUTE_UNUSED,
 640                    const struct cl_option_handlers *handlers ATTRIBUTE_UNUSED)
 641 {
 642   bool result = true;
 643   enum opt_code code = (enum opt_code) scode;
 644
 645   if (gfc_cpp_handle_option (scode, arg, value) == 1)
 646     return true;
 647
 648   switch (code)
 649     {
 650     default:
 651       if (cl_options[code].flags & gfc_option_lang_mask ())
 652         break;
 653       result = false;
 654       break;
 655
 656     case OPT_fcheck_array_temporaries:
 657       SET_BITFLAG (gfc_option.rtcheck, value, GFC_RTCHECK_ARRAY_TEMPS);
 658       break;
 659
 660     case OPT_fd_lines_as_code:
 661       gfc_option.flag_d_lines = 1;
 662       break;
 663
 664     case OPT_fd_lines_as_comments:
 665       gfc_option.flag_d_lines = 0;
 666       break;
 667
 668     case OPT_ffixed_form:
 669       gfc_option.source_form = FORM_FIXED;
 670       break;
 671
 672     case OPT_ffree_form:
 673       gfc_option.source_form = FORM_FREE;
 674       break;
 675
 676     case OPT_static_libgfortran:
 677 #ifndef HAVE_LD_STATIC_DYNAMIC
 678       gfc_fatal_error ("%<-static-libgfortran%> is not supported in this "
 679                        "configuration");
 680 #endif
 681       break;
 682
 683     case OPT_fintrinsic_modules_path:
 684     case OPT_fintrinsic_modules_path_:
 685
 686       /* This is needed because omp_lib.h is in a directory together
 687          with intrinsic modules.  Do no warn because during testing
 688          without an installed compiler, we would get lots of bogus
 689          warnings for a missing include directory.  */
 690       gfc_add_include_path (arg, false, false, false);
 691
 692       gfc_add_intrinsic_modules_path (arg);
 693       break;
 694
 695     case OPT_fpreprocessed:
 696       gfc_option.flag_preprocessed = value;
 697       break;
 698
 699     case OPT_fmax_identifier_length_:
 700       if (value > GFC_MAX_SYMBOL_LEN)
 701         gfc_fatal_error ("Maximum supported identifier length is %d",
 702                          GFC_MAX_SYMBOL_LEN);
 703       gfc_option.max_identifier_length = value;
 704       break;
 705
 706     case OPT_finit_local_zero:
 707       set_init_local_zero (value);
 708       break;
 709
 710     case OPT_finit_logical_:
 711       if (!strcasecmp (arg, "false"))
 712         gfc_option.flag_init_logical = GFC_INIT_LOGICAL_FALSE;
 713       else if (!strcasecmp (arg, "true"))
 714         gfc_option.flag_init_logical = GFC_INIT_LOGICAL_TRUE;
 715       else
 716         gfc_fatal_error ("Unrecognized option to %<-finit-logical%>: %s",
 717                          arg);
 718       break;
 719
 720     case OPT_finit_integer_:
 721       gfc_option.flag_init_integer = GFC_INIT_INTEGER_ON;
 722       gfc_option.flag_init_integer_value = strtol (arg, NULL, 10);
 723       break;
 724
 725     case OPT_finit_character_:
 726       if (value >= 0 && value <= 127)
 727         {
 728           gfc_option.flag_init_character = GFC_INIT_CHARACTER_ON;
 729           gfc_option.flag_init_character_value = (char)value;
 730         }
 731       else
 732         gfc_fatal_error ("The value of n in %<-finit-character=n%> must be "
 733                          "between 0 and 127");
 734       break;
 735
 736     case OPT_I:
 737       gfc_add_include_path (arg, true, false, true);
 738       break;
 739
 740     case OPT_J:
 741       gfc_handle_module_path_options (arg);
 742       break;
 743
 744     case OPT_ffpe_trap_:
 745       gfc_handle_fpe_option (arg, true);
 746       break;
 747
 748     case OPT_ffpe_summary_:
 749       gfc_handle_fpe_option (arg, false);
 750       break;
 751
 752     case OPT_std_f95:
 753       gfc_option.allow_std = GFC_STD_OPT_F95;
 754       gfc_option.warn_std = GFC_STD_F95_OBS;
 755       gfc_option.max_continue_fixed = 19;
 756       gfc_option.max_continue_free = 39;
 757       gfc_option.max_identifier_length = 31;
 758       warn_ampersand = 1;
 759       warn_tabs = 1;
 760       break;
 761
 762     case OPT_std_f2003:
 763       gfc_option.allow_std = GFC_STD_OPT_F03;
 764       gfc_option.warn_std = GFC_STD_F95_OBS;
 765       gfc_option.max_identifier_length = 63;
 766       warn_ampersand = 1;
 767       warn_tabs = 1;
 768       break;
 769
 770     case OPT_std_f2008:
 771       gfc_option.allow_std = GFC_STD_OPT_F08;
 772       gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F2008_OBS;
 773       gfc_option.max_identifier_length = 63;
 774       warn_ampersand = 1;
 775       warn_tabs = 1;
 776       break;
 777
 778     case OPT_std_f2008ts:
 779     case OPT_std_f2018:
 780       gfc_option.allow_std = GFC_STD_OPT_F18;
 781       gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F2008_OBS
 782         | GFC_STD_F2018_OBS;
 783       gfc_option.max_identifier_length = 63;
 784       warn_ampersand = 1;
 785       warn_tabs = 1;
 786       break;
 787
 788     case OPT_std_gnu:
 789       set_default_std_flags ();
 790       break;
 791
 792     case OPT_std_legacy:
 793       set_default_std_flags ();
 794       gfc_option.warn_std = 0;
 795       break;
 796
 797     case OPT_fshort_enums:
 798       /* Handled in language-independent code.  */
 799       break;
 800
 801     case OPT_fcheck_:
 802       gfc_handle_runtime_check_option (arg);
 803       break;
 804
 805     case OPT_fdec:
 806       /* Set (or unset) the DEC extension flags.  */
 807       set_dec_flags (value);
 808       break;
 809     }
 810
 811   Fortran_handle_option_auto (&global_options, &global_options_set,
 812                               scode, arg, value,
 813                               gfc_option_lang_mask (), kind,
 814                               loc, handlers, global_dc);
 815   return result;
 816 }
 817
 818
 819 /* Return a string with the options passed to the compiler; used for
 820    Fortran's compiler_options() intrinsic.  */
 821
 822 char *
 823 gfc_get_option_string (void)
 824 {
 825   unsigned j;
 826   size_t len, pos;
 827   char *result;
 828
 829   /* Allocate and return a one-character string with '\0'.  */
 830   if (!save_decoded_options_count)
 831     return XCNEWVEC (char, 1);
 832
 833   /* Determine required string length.  */
 834
 835   len = 0;
 836   for (j = 1; j < save_decoded_options_count; j++)
 837     {
 838       switch (save_decoded_options[j].opt_index)
 839         {
 840         case OPT_o:
 841         case OPT_d:
 842         case OPT_dumpbase:
 843         case OPT_dumpbase_ext:
 844         case OPT_dumpdir:
 845         case OPT_quiet:
 846         case OPT_version:
 847         case OPT_fintrinsic_modules_path:
 848         case OPT_fintrinsic_modules_path_:
 849           /* Ignore these.  */
 850           break;
 851         default:
 852           /* Ignore file names.  */
 853           if (save_decoded_options[j].orig_option_with_args_text[0] == '-')
 854             len += 1
 855                  + strlen (save_decoded_options[j].orig_option_with_args_text);
 856         }
 857     }
 858
 859   result = XCNEWVEC (char, len);
 860
 861   pos = 0;
 862   for (j = 1; j < save_decoded_options_count; j++)
 863     {
 864       switch (save_decoded_options[j].opt_index)
 865         {
 866         case OPT_o:
 867         case OPT_d:
 868         case OPT_dumpbase:
 869         case OPT_dumpbase_ext:
 870         case OPT_dumpdir:
 871         case OPT_quiet:
 872         case OPT_version:
 873         case OPT_fintrinsic_modules_path:
 874         case OPT_fintrinsic_modules_path_:
 875           /* Ignore these.  */
 876           continue;
 877
 878         case OPT_cpp_:
 879           /* Use "-cpp" rather than "-cpp=<temporary file>".  */
 880           len = 4;
 881           break;
 882
 883         default:
 884           /* Ignore file names.  */
 885           if (save_decoded_options[j].orig_option_with_args_text[0] != '-')
 886             continue;
 887
 888           len = strlen (save_decoded_options[j].orig_option_with_args_text);
 889         }
 890
 891       memcpy (&result[pos], save_decoded_options[j].orig_option_with_args_text, len);
 892       pos += len;
 893       result[pos++] = ' ';
 894     }
 895
 896   result[--pos] = '\0';
 897   return result;
 898 }
 899
 900 #undef SET_BITFLAG
 901 #undef SET_BITFLAG2
 902 #undef SET_FLAG