1: /* Copyright (C) 1999, 2001, 2004 Free Software Foundation, Inc.
    2:    This file is part of the GNU C Library.
    3: 
    4:    The GNU C Library is free software; you can redistribute it and/or
    5:    modify it under the terms of the GNU Lesser General Public
    6:    License as published by the Free Software Foundation; either
    7:    version 2.1 of the License, or (at your option) any later version.
    8: 
    9:    The GNU C Library is distributed in the hope that it will be useful,
   10:    but WITHOUT ANY WARRANTY; without even the implied warranty of
   11:    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   12:    Lesser General Public License for more details.
   13: 
   14:    You should have received a copy of the GNU Lesser General Public
   15:    License along with the GNU C Library; if not, write to the Free
   16:    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   17:    02111-1307 USA.  */
   18: 
   19: #ifndef _UNISTD_H
   20: # error "Never include this file directly.  Use <unistd.h> instead"
   21: #endif
   22: 
   23: #include <bits/wordsize.h>
   24: 
   25: /* This header should define the following symbols under the described
   26:    situations.  A value `1' means that the model is always supported,
   27:    `-1' means it is never supported.  Undefined means it cannot be
   28:    statically decided.
   29: 
   30:    _POSIX_V6_ILP32_OFF32   32bit int, long, pointers, and off_t type
   31:    _POSIX_V6_ILP32_OFFBIG  32bit int, long, and pointers and larger off_t type
   32: 
   33:    _POSIX_V6_LP64_OFF32    64bit long and pointers and 32bit off_t type
   34:    _POSIX_V6_LPBIG_OFFBIG  64bit long and pointers and large off_t type
   35: 
   36:    The macros _XBS5_ILP32_OFF32, _XBS5_ILP32_OFFBIG, _XBS5_LP64_OFF32, and
   37:    _XBS5_LPBIG_OFFBIG were used in previous versions of the Unix standard
   38:    and are available only for compatibility.
   39: */
   40: 
   41: #if __WORDSIZE == 64
   42: 
   43: /* We can never provide environments with 32-bit wide pointers.  */
   44: # define _POSIX_V6_ILP32_OFF32  -1
   45: # define _POSIX_V6_ILP32_OFFBIG -1
   46: # define _XBS5_ILP32_OFF32      -1
   47: # define _XBS5_ILP32_OFFBIG     -1
   48: /* We also have no use (for now) for an environment with bigger pointers
   49:    and offsets.  */
   50: # define _POSIX_V6_LPBIG_OFFBIG -1
   51: # define _XBS5_LPBIG_OFFBIG     -1
   52: 
   53: /* By default we have 64-bit wide `long int', pointers and `off_t'.  */
   54: # define _POSIX_V6_LP64_OFF64   1
   55: # define _XBS5_LP64_OFF64       1
   56: 
   57: #else /* __WORDSIZE == 32 */
   58: 
   59: /* By default we have 32-bit wide `int', `long int', pointers and `off_t'
   60:    and all platforms support LFS.  */
   61: # define _POSIX_V6_ILP32_OFF32  1
   62: # define _POSIX_V6_ILP32_OFFBIG 1
   63: # define _XBS5_ILP32_OFF32      1
   64: # define _XBS5_ILP32_OFFBIG     1
   65: 
   66: /* We optionally provide an environment with the above size but an 64-bit
   67:    side `off_t'.  Therefore we don't define _XBS5_ILP32_OFFBIG.  */
   68: 
   69: /* We can never provide environments with 64-bit wide pointers.  */
   70: # define _POSIX_V6_LP64_OFF64   -1
   71: # define _POSIX_V6_LPBIG_OFFBIG -1
   72: # define _XBS5_LP64_OFF64       -1
   73: # define _XBS5_LPBIG_OFFBIG     -1
   74: 
   75: /* CFLAGS.  */
   76: #define __ILP32_OFFBIG_CFLAGS   "-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
   77: 
   78: #endif /* __WORDSIZE == 32 */