gcc/fortran/options.c

   1 /* Parse and display command line options.
   2    Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005 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
  24 #include "config.h"
  25 #include "system.h"
  26 #include "coretypes.h"
  27 #include "tree.h"
  28 #include "flags.h"
  29 #include "intl.h"
  30 #include "opts.h"
  31 #include "options.h"
  32 #include "tree-inline.h"
  33
  34 #include "gfortran.h"
  35
  36 gfc_option_t gfc_option;
  37
  38
  39 /* Get ready for options handling.  */
  40
  41 unsigned int
  42 gfc_init_options (unsigned int argc ATTRIBUTE_UNUSED,
  43                   const char **argv ATTRIBUTE_UNUSED)
  44 {
  45   gfc_option.source = NULL;
  46   gfc_option.module_dir = NULL;
  47   gfc_option.source_form = FORM_UNKNOWN;
  48   gfc_option.fixed_line_length = 72;
  49   gfc_option.max_identifier_length = GFC_MAX_SYMBOL_LEN;
  50   gfc_option.verbose = 0;
  51
  52   gfc_option.warn_aliasing = 0;
  53   gfc_option.warn_conversion = 0;
  54   gfc_option.warn_implicit_interface = 0;
  55   gfc_option.warn_line_truncation = 0;
  56   gfc_option.warn_underflow = 1;
  57   gfc_option.warn_surprising = 0;
  58   gfc_option.warn_unused_labels = 0;
  59
  60   gfc_option.flag_dollar_ok = 0;
  61   gfc_option.flag_underscoring = 1;
  62   gfc_option.flag_second_underscore = 1;
  63   gfc_option.flag_implicit_none = 0;
  64   gfc_option.flag_max_stack_var_size = 32768;
  65   gfc_option.flag_module_access_private = 0;
  66   gfc_option.flag_no_backend = 0;
  67   gfc_option.flag_pack_derived = 0;
  68   gfc_option.flag_repack_arrays = 0;
  69
  70   gfc_option.q_kind = gfc_default_double_kind;
  71   gfc_option.i8 = 0;
  72   gfc_option.r8 = 0;
  73   gfc_option.d8 = 0;
  74
  75   flag_argument_noalias = 2;
  76   flag_errno_math = 0;
  77
  78   gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
  79     | GFC_STD_F2003 | GFC_STD_F95 | GFC_STD_F77 | GFC_STD_GNU;
  80   gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
  81     | GFC_STD_F2003;
  82
  83   gfc_option.warn_nonstd_intrinsics = 0;
  84
  85   return CL_F95;
  86 }
  87
  88
  89 /* Finalize commandline options.  */
  90
  91 bool
  92 gfc_post_options (const char **pfilename)
  93 {
  94   const char *filename = *pfilename;
  95
  96   /* Verify the input file name.  */
  97   if (!filename || strcmp (filename, "-") == 0)
  98     {
  99       filename = "";
 100     }
 101
 102   gfc_option.source = filename;
 103
 104   flag_inline_trees = 1;
 105
 106   /* Use tree inlining.  */
 107   if (!flag_no_inline)
 108     flag_no_inline = 1;
 109   if (flag_inline_functions)
 110     flag_inline_trees = 2;
 111
 112   /* If -pedantic, warn about the use of GNU extensions.  */
 113   if (pedantic && (gfc_option.allow_std & GFC_STD_GNU) != 0)
 114     gfc_option.warn_std |= GFC_STD_GNU;
 115
 116   return false;
 117 }
 118
 119
 120 /* Set the options for -Wall.  */
 121
 122 static void
 123 set_Wall (void)
 124 {
 125
 126   gfc_option.warn_aliasing = 1;
 127   gfc_option.warn_line_truncation = 1;
 128   gfc_option.warn_underflow = 1;
 129   gfc_option.warn_surprising = 1;
 130   gfc_option.warn_unused_labels = 1;
 131   gfc_option.warn_nonstd_intrinsics = 1;
 132
 133   set_Wunused (1);
 134   warn_return_type = 1;
 135   warn_switch = 1;
 136
 137   /* We save the value of warn_uninitialized, since if they put
 138      -Wuninitialized on the command line, we need to generate a
 139      warning about not using it without also specifying -O.  */
 140
 141   if (warn_uninitialized != 1)
 142     warn_uninitialized = 2;
 143 }
 144
 145
 146 static void
 147 gfc_handle_module_path_options (const char *arg)
 148 {
 149
 150   if (gfc_option.module_dir != NULL)
 151     {
 152       gfc_status ("gfortran: Only one -M option allowed\n");
 153       exit (3);
 154     }
 155
 156   if (arg == NULL)
 157     {
 158       gfc_status ("gfortran: Directory required after -M\n");
 159       exit (3);
 160     }
 161
 162   gfc_option.module_dir = (char *) gfc_getmem (strlen (arg) + 2);
 163   strcpy (gfc_option.module_dir, arg);
 164   strcat (gfc_option.module_dir, "/");
 165 }
 166
 167 /* Handle command-line options.  Returns 0 if unrecognized, 1 if
 168    recognized and handled.  */
 169 int
 170 gfc_handle_option (size_t scode, const char *arg, int value)
 171 {
 172   int result = 1;
 173   enum opt_code code = (enum opt_code) scode;
 174
 175   /* Ignore file names.  */
 176   if (code == N_OPTS)
 177     return 1;
 178
 179   switch (code)
 180     {
 181     default:
 182       result = 0;
 183       break;
 184
 185     case OPT_Wall:
 186       set_Wall ();
 187       break;
 188
 189     case OPT_Waliasing:
 190       gfc_option.warn_aliasing = value;
 191       break;
 192
 193     case OPT_Wconversion:
 194       gfc_option.warn_conversion = value;
 195       break;
 196
 197     case OPT_Wimplicit_interface:
 198       gfc_option.warn_implicit_interface = value;
 199       break;
 200
 201     case OPT_Wline_truncation:
 202       gfc_option.warn_line_truncation = value;
 203       break;
 204
 205     case OPT_Wunderflow:
 206       gfc_option.warn_underflow = value;
 207       break;
 208
 209     case OPT_Wsurprising:
 210       gfc_option.warn_surprising = value;
 211       break;
 212
 213     case OPT_Wunused_labels:
 214       gfc_option.warn_unused_labels = value;
 215       break;
 216
 217     case OPT_fdollar_ok:
 218       gfc_option.flag_dollar_ok = value;
 219       break;
 220
 221     case OPT_fdump_parse_tree:
 222       gfc_option.verbose = value;
 223       break;
 224
 225     case OPT_ffixed_form:
 226       gfc_option.source_form = FORM_FIXED;
 227       break;
 228
 229     case OPT_ffree_form:
 230       gfc_option.source_form = FORM_FREE;
 231       break;
 232
 233     case OPT_funderscoring:
 234       gfc_option.flag_underscoring = value;
 235       break;
 236
 237     case OPT_fsecond_underscore:
 238       gfc_option.flag_second_underscore = value;
 239       break;
 240
 241     case OPT_fimplicit_none:
 242       gfc_option.flag_implicit_none = value;
 243       break;
 244
 245     case OPT_fmax_stack_var_size_:
 246       gfc_option.flag_max_stack_var_size = value;
 247       break;
 248
 249     case OPT_fmodule_private:
 250       gfc_option.flag_module_access_private = value;
 251       break;
 252
 253     case OPT_fno_backend:
 254       gfc_option.flag_no_backend = value;
 255       break;
 256
 257     case OPT_fpack_derived:
 258       gfc_option.flag_pack_derived = value;
 259       break;
 260
 261     case OPT_frepack_arrays:
 262       gfc_option.flag_repack_arrays = value;
 263       break;
 264
 265     case OPT_ffixed_line_length_none:
 266       gfc_option.fixed_line_length = 0;
 267       break;
 268
 269     case OPT_ffixed_line_length_:
 270       if (value != 0 && value < 7)
 271         gfc_fatal_error ("Fixed line length must be at least seven.");
 272       gfc_option.fixed_line_length = value;
 273       break;
 274
 275     case OPT_fmax_identifier_length_:
 276       if (value > GFC_MAX_SYMBOL_LEN)
 277         gfc_fatal_error ("Maximum supported idenitifier length is %d",
 278                          GFC_MAX_SYMBOL_LEN);
 279       gfc_option.max_identifier_length = value;
 280       break;
 281
 282     case OPT_qkind_:
 283       if (gfc_validate_kind (BT_REAL, value, true) < 0)
 284         gfc_fatal_error ("Argument to -fqkind isn't a valid real kind");
 285       gfc_option.q_kind = value;
 286       break;
 287
 288     case OPT_i8:
 289       gfc_option.i8 = value;
 290       break;
 291
 292     case OPT_r8:
 293       gfc_option.r8 = value;
 294       break;
 295
 296     case OPT_d8:
 297       gfc_option.d8 = value;
 298       break;
 299
 300     case OPT_I:
 301       gfc_add_include_path (arg);
 302       break;
 303
 304     case OPT_J:
 305     case OPT_M:
 306       gfc_handle_module_path_options (arg);
 307       break;
 308
 309     case OPT_std_f95:
 310       gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95 | GFC_STD_F77;
 311       gfc_option.warn_std = GFC_STD_F95_OBS;
 312       gfc_option.max_identifier_length = 31;
 313       break;
 314
 315     case OPT_std_f2003:
 316       gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F77
 317         | GFC_STD_F2003 | GFC_STD_F95;
 318       gfc_option.warn_std = GFC_STD_F95_OBS;
 319       gfc_option.max_identifier_length = 63;
 320       break;
 321
 322     case OPT_std_gnu:
 323       gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
 324         | GFC_STD_F77 | GFC_STD_F95 | GFC_STD_F2003
 325         | GFC_STD_GNU;
 326       gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL;
 327       break;
 328
 329     case OPT_Wnonstd_intrinsics:
 330       gfc_option.warn_nonstd_intrinsics = 1;
 331       break;
 332     }
 333
 334   return result;
 335 }