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_OBS | GFC_STD_F2003_DEL | GFC_STD_F2003 | GFC_STD_GNU;
  82   gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
  83     | GFC_STD_F2003;
  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     {
 111       flag_inline_trees = 2;
 112       flag_inline_functions = 0;
 113     }
 114
 115   /* If -pedantic, warn about the use of GNU extensions.  */
 116   if (pedantic && (gfc_option.allow_std & GFC_STD_GNU) != 0)
 117     gfc_option.warn_std |= GFC_STD_GNU;
 118
 119   return false;
 120 }
 121
 122
 123 /* Set the options for -Wall.  */
 124
 125 static void
 126 set_Wall (void)
 127 {
 128
 129   gfc_option.warn_aliasing = 1;
 130   gfc_option.warn_line_truncation = 1;
 131   gfc_option.warn_underflow = 1;
 132   gfc_option.warn_surprising = 1;
 133   gfc_option.warn_unused_labels = 1;
 134
 135   set_Wunused (1);
 136   warn_return_type = 1;
 137   warn_switch = 1;
 138
 139   /* We save the value of warn_uninitialized, since if they put
 140      -Wuninitialized on the command line, we need to generate a
 141      warning about not using it without also specifying -O.  */
 142
 143   if (warn_uninitialized != 1)
 144     warn_uninitialized = 2;
 145 }
 146
 147
 148 static void
 149 gfc_handle_module_path_options (const char *arg)
 150 {
 151
 152   if (gfc_option.module_dir != NULL)
 153     {
 154       gfc_status ("gfortran: Only one -M option allowed\n");
 155       exit (3);
 156     }
 157
 158   if (arg == NULL)
 159     {
 160       gfc_status ("gfortran: Directory required after -M\n");
 161       exit (3);
 162     }
 163
 164   gfc_option.module_dir = (char *) gfc_getmem (strlen (arg) + 2);
 165   strcpy (gfc_option.module_dir, arg);
 166   strcat (gfc_option.module_dir, "/");
 167 }
 168
 169 /* Handle command-line options.  Returns 0 if unrecognized, 1 if
 170    recognized and handled.  */
 171 int
 172 gfc_handle_option (size_t scode, const char *arg, int value)
 173 {
 174   int result = 1;
 175   enum opt_code code = (enum opt_code) scode;
 176
 177   /* Ignore file names.  */
 178   if (code == N_OPTS)
 179     return 1;
 180
 181   switch (code)
 182     {
 183     default:
 184       result = 0;
 185       break;
 186
 187     case OPT_Wall:
 188       set_Wall ();
 189       break;
 190
 191     case OPT_Waliasing:
 192       gfc_option.warn_aliasing = value;
 193       break;
 194
 195     case OPT_Wconversion:
 196       gfc_option.warn_conversion = value;
 197       break;
 198
 199     case OPT_Wimplicit_interface:
 200       gfc_option.warn_implicit_interface = value;
 201       break;
 202
 203     case OPT_Wline_truncation:
 204       gfc_option.warn_line_truncation = value;
 205       break;
 206
 207     case OPT_Wunderflow:
 208       gfc_option.warn_underflow = value;
 209       break;
 210
 211     case OPT_Wsurprising:
 212       gfc_option.warn_surprising = value;
 213       break;
 214
 215     case OPT_Wunused_labels:
 216       gfc_option.warn_unused_labels = value;
 217       break;
 218
 219     case OPT_fdollar_ok:
 220       gfc_option.flag_dollar_ok = value;
 221       break;
 222
 223     case OPT_fdump_parse_tree:
 224       gfc_option.verbose = value;
 225       break;
 226
 227     case OPT_ffixed_form:
 228       gfc_option.source_form = FORM_FIXED;
 229       break;
 230
 231     case OPT_ffree_form:
 232       gfc_option.source_form = FORM_FREE;
 233       break;
 234
 235     case OPT_funderscoring:
 236       gfc_option.flag_underscoring = value;
 237       break;
 238
 239     case OPT_fsecond_underscore:
 240       gfc_option.flag_second_underscore = value;
 241       break;
 242
 243     case OPT_fimplicit_none:
 244       gfc_option.flag_implicit_none = value;
 245       break;
 246
 247     case OPT_fmax_stack_var_size_:
 248       gfc_option.flag_max_stack_var_size = value;
 249       break;
 250
 251     case OPT_fmodule_private:
 252       gfc_option.flag_module_access_private = value;
 253       break;
 254
 255     case OPT_fno_backend:
 256       gfc_option.flag_no_backend = value;
 257       break;
 258
 259     case OPT_fpack_derived:
 260       gfc_option.flag_pack_derived = value;
 261       break;
 262
 263     case OPT_frepack_arrays:
 264       gfc_option.flag_repack_arrays = value;
 265       break;
 266
 267     case OPT_ffixed_line_length_none:
 268       gfc_option.fixed_line_length = 0;
 269       break;
 270
 271     case OPT_ffixed_line_length_:
 272       if (value != 0 && value < 7)
 273         gfc_fatal_error ("Fixed line length must be at least seven.");
 274       gfc_option.fixed_line_length = value;
 275       break;
 276
 277     case OPT_fmax_identifier_length_:
 278       if (value > GFC_MAX_SYMBOL_LEN)
 279         gfc_fatal_error ("Maximum supported idenitifier length is %d",
 280                          GFC_MAX_SYMBOL_LEN);
 281       gfc_option.max_identifier_length = value;
 282       break;
 283
 284     case OPT_qkind_:
 285       if (gfc_validate_kind (BT_REAL, value) < 0)
 286         gfc_fatal_error ("Argument to -fqkind isn't a valid real kind");
 287       gfc_option.q_kind = value;
 288       break;
 289
 290     case OPT_i8:
 291       gfc_option.i8 = value;
 292       break;
 293
 294     case OPT_r8:
 295       gfc_option.r8 = value;
 296       break;
 297
 298     case OPT_d8:
 299       gfc_option.d8 = value;
 300       break;
 301
 302     case OPT_I:
 303       gfc_add_include_path (arg);
 304       break;
 305
 306     case OPT_J:
 307     case OPT_M:
 308       gfc_handle_module_path_options (arg);
 309
 310     case OPT_std_f95:
 311       gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F2003_OBS
 312         | GFC_STD_F2003_DEL;
 313       gfc_option.warn_std = GFC_STD_F95_OBS;
 314       gfc_option.max_identifier_length = 31;
 315       break;
 316
 317     case OPT_std_f2003:
 318       gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F2003_OBS
 319         | GFC_STD_F2003;
 320       gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F2003_OBS;
 321       gfc_option.max_identifier_length = 63;
 322       break;
 323
 324     case OPT_std_gnu:
 325       gfc_option.allow_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
 326         | GFC_STD_F2003_OBS | GFC_STD_F2003_DEL | GFC_STD_F2003 | GFC_STD_GNU;
 327       gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F95_DEL
 328         | GFC_STD_F2003_OBS | GFC_STD_F2003_DEL;
 329       break;
 330     }
 331
 332   return result;
 333 }