1  /* Copyright (C) 1999-2023 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, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #ifndef _UNISTD_H
      19  # error "Never include this file directly.  Use <unistd.h> instead"
      20  #endif
      21  
      22  #include <bits/wordsize.h>
      23  
      24  /* This header should define the following symbols under the described
      25     situations.  A value `1' means that the model is always supported,
      26     `-1' means it is never supported.  Undefined means it cannot be
      27     statically decided.
      28  
      29     _POSIX_V7_ILP32_OFF32   32bit int, long, pointers, and off_t type
      30     _POSIX_V7_ILP32_OFFBIG  32bit int, long, and pointers and larger off_t type
      31  
      32     _POSIX_V7_LP64_OFF32	   64bit long and pointers and 32bit off_t type
      33     _POSIX_V7_LPBIG_OFFBIG  64bit long and pointers and large off_t type
      34  
      35     The macros _POSIX_V6_ILP32_OFF32, _POSIX_V6_ILP32_OFFBIG,
      36     _POSIX_V6_LP64_OFF32, _POSIX_V6_LPBIG_OFFBIG, _XBS5_ILP32_OFF32,
      37     _XBS5_ILP32_OFFBIG, _XBS5_LP64_OFF32, and _XBS5_LPBIG_OFFBIG were
      38     used in previous versions of the Unix standard and are available
      39     only for compatibility.
      40  */
      41  
      42  #if __WORDSIZE == 64
      43  
      44  /* We can never provide environments with 32-bit wide pointers.  */
      45  # define _POSIX_V7_ILP32_OFF32	-1
      46  # define _POSIX_V7_ILP32_OFFBIG	-1
      47  # define _POSIX_V6_ILP32_OFF32	-1
      48  # define _POSIX_V6_ILP32_OFFBIG	-1
      49  # define _XBS5_ILP32_OFF32	-1
      50  # define _XBS5_ILP32_OFFBIG	-1
      51  /* We also have no use (for now) for an environment with bigger pointers
      52     and offsets.  */
      53  # define _POSIX_V7_LPBIG_OFFBIG	-1
      54  # define _POSIX_V6_LPBIG_OFFBIG	-1
      55  # define _XBS5_LPBIG_OFFBIG	-1
      56  
      57  /* By default we have 64-bit wide `long int', pointers and `off_t'.  */
      58  # define _POSIX_V7_LP64_OFF64	1
      59  # define _POSIX_V6_LP64_OFF64	1
      60  # define _XBS5_LP64_OFF64	1
      61  
      62  #else /* __WORDSIZE == 32 */
      63  
      64  /* By default we have 32-bit wide `int', `long int', pointers and `off_t'
      65     and all platforms support LFS.  */
      66  # define _POSIX_V7_ILP32_OFF32	1
      67  # define _POSIX_V7_ILP32_OFFBIG	1
      68  # define _POSIX_V6_ILP32_OFF32	1
      69  # define _POSIX_V6_ILP32_OFFBIG	1
      70  # define _XBS5_ILP32_OFF32	1
      71  # define _XBS5_ILP32_OFFBIG	1
      72  
      73  /* We optionally provide an environment with the above size but an 64-bit
      74     side `off_t'.  Therefore we don't define _POSIX_V7_ILP32_OFFBIG.  */
      75  
      76  /* We can never provide environments with 64-bit wide pointers.  */
      77  # define _POSIX_V7_LP64_OFF64	-1
      78  # define _POSIX_V7_LPBIG_OFFBIG	-1
      79  # define _POSIX_V6_LP64_OFF64	-1
      80  # define _POSIX_V6_LPBIG_OFFBIG	-1
      81  # define _XBS5_LP64_OFF64	-1
      82  # define _XBS5_LPBIG_OFFBIG	-1
      83  
      84  /* CFLAGS.  */
      85  #define __ILP32_OFFBIG_CFLAGS   "-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
      86  
      87  #endif /* __WORDSIZE == 32 */