gcc/fortran/options.c

   1 /* Parse and display command line options.
   2    Copyright (C) 2000, 2001, 2002, 2003, 2004 Free Software Foundation,
   3    Inc.
   4    Contributed by Andy Vaught
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify it under
   9 the terms of the GNU General Public License as published by the Free
  10 Software Foundation; either version 2, or (at your option) any later
  11 version.
  12
  13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING.  If not, write to the Free
  20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  21 02111-1307, USA.  */
  22
  23 #include <string.h>
  24 #include <stdlib.h>
  25
  26 #include "config.h"
  27 #include "system.h"
  28 #include "coretypes.h"
  29 #include "tree.h"
  30 #include "flags.h"
  31 #include "intl.h"
  32 #include "opts.h"
  33 #include "options.h"
  34 #include "tree-inline.h"
  35
  36 #include "gfortran.h"
  37
  38 gfc_option_t gfc_option;
  39
  40
  41 /* Get ready for options handling.  */
  42
  43 unsigned int
  44 gfc_init_options (unsigned int argc ATTRIBUTE_UNUSED,
  45                   const char **argv ATTRIBUTE_UNUSED)
  46 {
  47
  48   gfc_option.source = NULL;
  49   gfc_option.module_dir = NULL;
  50   gfc_option.source_form = FORM_UNKNOWN;
  51   gfc_option.fixed_line_length = 72;
  52   gfc_option.max_identifier_length = GFC_MAX_SYMBOL_LEN;
  53   gfc_option.verbose = 0;
  54
  55   gfc_option.warn_aliasing = 0;
  56   gfc_option.warn_conversion = 0;
  57   gfc_option.warn_implicit_interface = 0;
  58   gfc_option.warn_line_truncation = 0;
  59   gfc_option.warn_underflow = 1;
  60   gfc_option.warn_surprising = 0;
  61   gfc_option.warn_unused_labels = 0;
  62
  63   gfc_option.flag_dollar_ok = 0;
  64   gfc_option.flag_underscoring = 1;
  65   gfc_option.flag_second_underscore = 1;
  66   gfc_option.flag_implicit_none = 0;
  67   gfc_option.flag_max_stack_var_size = 32768;
  68   gfc_option.flag_module_access_private = 0;
  69   gfc_option.flag_no_backend = 0;
  70   gfc_option.flag_pack_derived = 0;
  71   gfc_option.flag_repack_arrays = 0;
  72
  73   gfc_option.q_kind = gfc_default_double_kind;
  74   gfc_option.i8 = 0;
  75   gfc_option.r8 = 0;
  76   gfc_option.d8 = 0;
  77
  78   flag_argument_noalias = 2;
  79
  80   gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
  81     | GFC_STD_F2003 | GFC_STD_F95 | GFC_STD_F77 | GFC_STD_GNU;
  82   gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
  83     | GFC_STD_F2003;
  84
  85   gfc_option.warn_nonstd_intrinsics = 0;
  86
  87   return CL_F95;
  88 }
  89
  90
  91 /* Finalize commandline options.  */
  92
  93 bool
  94 gfc_post_options (const char **pfilename)
  95 {
  96   const char *filename = *pfilename;
  97
  98   /* Verify the input file name.  */
  99   if (!filename || strcmp (filename, "-") == 0)
 100     {
 101       filename = "";
 102     }
 103
 104   gfc_option.source = filename;
 105
 106   flag_inline_trees = 1;
 107
 108   /* Use tree inlining.  */
 109   if (!flag_no_inline)
 110     flag_no_inline = 1;
 111   if (flag_inline_functions)
 112     {
 113       flag_inline_trees = 2;
 114       flag_inline_functions = 0;
 115     }
 116
 117   /* If -pedantic, warn about the use of GNU extensions.  */
 118   if (pedantic && (gfc_option.allow_std & GFC_STD_GNU) != 0)
 119     gfc_option.warn_std |= GFC_STD_GNU;
 120
 121   return false;
 122 }
 123
 124
 125 /* Set the options for -Wall.  */
 126
 127 static void
 128 set_Wall (void)
 129 {
 130
 131   gfc_option.warn_aliasing = 1;
 132   gfc_option.warn_line_truncation = 1;
 133   gfc_option.warn_underflow = 1;
 134   gfc_option.warn_surprising = 1;
 135   gfc_option.warn_unused_labels = 1;
 136   gfc_option.warn_nonstd_intrinsics = 1;
 137
 138   set_Wunused (1);
 139   warn_return_type = 1;
 140   warn_switch = 1;
 141
 142   /* We save the value of warn_uninitialized, since if they put
 143      -Wuninitialized on the command line, we need to generate a
 144      warning about not using it without also specifying -O.  */
 145
 146   if (warn_uninitialized != 1)
 147     warn_uninitialized = 2;
 148 }
 149
 150
 151 static void
 152 gfc_handle_module_path_options (const char *arg)
 153 {
 154
 155   if (gfc_option.module_dir != NULL)
 156     {
 157       gfc_status ("gfortran: Only one -M option allowed\n");
 158       exit (3);
 159     }
 160
 161   if (arg == NULL)
 162     {
 163       gfc_status ("gfortran: Directory required after -M\n");
 164       exit (3);
 165     }
 166
 167   gfc_option.module_dir = (char *) gfc_getmem (strlen (arg) + 2);
 168   strcpy (gfc_option.module_dir, arg);
 169   strcat (gfc_option.module_dir, "/");
 170 }
 171
 172 /* Handle command-line options.  Returns 0 if unrecognized, 1 if
 173    recognized and handled.  */
 174 int
 175 gfc_handle_option (size_t scode, const char *arg, int value)
 176 {
 177   int result = 1;
 178   enum opt_code code = (enum opt_code) scode;
 179
 180   /* Ignore file names.  */
 181   if (code == N_OPTS)
 182     return 1;
 183
 184   switch (code)
 185     {
 186     default:
 187       result = 0;
 188       break;
 189
 190     case OPT_Wall:
 191       set_Wall ();
 192       break;
 193
 194     case OPT_Waliasing:
 195       gfc_option.warn_aliasing = value;
 196       break;
 197
 198     case OPT_Wconversion:
 199       gfc_option.warn_conversion = value;
 200       break;
 201
 202     case OPT_Wimplicit_interface:
 203       gfc_option.warn_implicit_interface = value;
 204       break;
 205
 206     case OPT_Wline_truncation:
 207       gfc_option.warn_line_truncation = value;
 208       break;
 209
 210     case OPT_Wunderflow:
 211       gfc_option.warn_underflow = value;
 212       break;
 213
 214     case OPT_Wsurprising:
 215       gfc_option.warn_surprising = value;
 216       break;
 217
 218     case OPT_Wunused_labels:
 219       gfc_option.warn_unused_labels = value;
 220       break;
 221
 222     case OPT_fdollar_ok:
 223       gfc_option.flag_dollar_ok = value;
 224       break;
 225
 226     case OPT_fdump_parse_tree:
 227       gfc_option.verbose = value;
 228       break;
 229
 230     case OPT_ffixed_form:
 231       gfc_option.source_form = FORM_FIXED;
 232       break;
 233
 234     case OPT_ffree_form:
 235       gfc_option.source_form = FORM_FREE;
 236       break;
 237
 238     case OPT_funderscoring:
 239       gfc_option.flag_underscoring = value;
 240       break;
 241
 242     case OPT_fsecond_underscore:
 243       gfc_option.flag_second_underscore = value;
 244       break;
 245
 246     case OPT_fimplicit_none:
 247       gfc_option.flag_implicit_none = value;
 248       break;
 249
 250     case OPT_fmax_stack_var_size_:
 251       gfc_option.flag_max_stack_var_size = value;
 252       break;
 253
 254     case OPT_fmodule_private:
 255       gfc_option.flag_module_access_private = value;
 256       break;
 257
 258     case OPT_fno_backend:
 259       gfc_option.flag_no_backend = value;
 260       break;
 261
 262     case OPT_fpack_derived:
 263       gfc_option.flag_pack_derived = value;
 264       break;
 265
 266     case OPT_frepack_arrays:
 267       gfc_option.flag_repack_arrays = value;
 268       break;
 269
 270     case OPT_ffixed_line_length_none:
 271       gfc_option.fixed_line_length = 0;
 272       break;
 273
 274     case OPT_ffixed_line_length_:
 275       if (value != 0 && value < 7)
 276         gfc_fatal_error ("Fixed line length must be at least seven.");
 277       gfc_option.fixed_line_length = value;
 278       break;
 279
 280     case OPT_fmax_identifier_length_:
 281       if (value > GFC_MAX_SYMBOL_LEN)
 282         gfc_fatal_error ("Maximum supported idenitifier length is %d",
 283                          GFC_MAX_SYMBOL_LEN);
 284       gfc_option.max_identifier_length = value;
 285       break;
 286
 287     case OPT_qkind_:
 288       if (gfc_validate_kind (BT_REAL, value, true) < 0)
 289         gfc_fatal_error ("Argument to -fqkind isn't a valid real kind");
 290       gfc_option.q_kind = value;
 291       break;
 292
 293     case OPT_i8:
 294       gfc_option.i8 = value;
 295       break;
 296
 297     case OPT_r8:
 298       gfc_option.r8 = value;
 299       break;
 300
 301     case OPT_d8:
 302       gfc_option.d8 = value;
 303       break;
 304
 305     case OPT_I:
 306       gfc_add_include_path (arg);
 307       break;
 308
 309     case OPT_J:
 310     case OPT_M:
 311       gfc_handle_module_path_options (arg);
 312       break;
 313
 314     case OPT_std_f95:
 315       gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95 | GFC_STD_F77;
 316       gfc_option.warn_std = GFC_STD_F95_OBS;
 317       gfc_option.max_identifier_length = 31;
 318       break;
 319
 320     case OPT_std_f2003:
 321       gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
 322         | GFC_STD_F2003 | GFC_STD_F95;
 323       gfc_option.warn_std = GFC_STD_F95_OBS;
 324       gfc_option.max_identifier_length = 63;
 325       break;
 326
 327     case OPT_std_gnu:
 328       gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
 329         | GFC_STD_F77 | GFC_STD_F95 | GFC_STD_F2003
 330         | GFC_STD_GNU;
 331       gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL;
 332       break;
 333
 334     case OPT_Wnonstd_intrinsics:
 335       gfc_option.warn_nonstd_intrinsics = 1;
 336       break;
 337     }
 338
 339   return result;
 340 }