1/* Copyright (C) 1999-2025 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/* Environments with 32-bit wide pointers are optionally provided.
45   Therefore following macros aren't defined:
46   # undef _POSIX_V7_ILP32_OFF32
47   # undef _POSIX_V7_ILP32_OFFBIG
48   # undef _POSIX_V6_ILP32_OFF32
49   # undef _POSIX_V6_ILP32_OFFBIG
50   # undef _XBS5_ILP32_OFF32
51   # undef _XBS5_ILP32_OFFBIG
52   and users need to check at runtime.  */
53
54/* We also have no use (for now) for an environment with bigger pointers
55   and offsets.  */
56# define _POSIX_V7_LPBIG_OFFBIG	-1
57# define _POSIX_V6_LPBIG_OFFBIG	-1
58# define _XBS5_LPBIG_OFFBIG	-1
59
60/* By default we have 64-bit wide `long int', pointers and `off_t'.  */
61# define _POSIX_V7_LP64_OFF64	1
62# define _POSIX_V6_LP64_OFF64	1
63# define _XBS5_LP64_OFF64	1
64
65#else /* __WORDSIZE == 32 */
66
67/* By default we have 32-bit wide `int', `long int', pointers and `off_t'
68   and all platforms support LFS.  */
69# define _POSIX_V7_ILP32_OFF32	1
70# define _POSIX_V7_ILP32_OFFBIG	1
71# define _POSIX_V6_ILP32_OFF32	1
72# define _POSIX_V6_ILP32_OFFBIG	1
73# define _XBS5_ILP32_OFF32	1
74# define _XBS5_ILP32_OFFBIG	1
75
76/* We optionally provide an environment with the above size but an 64-bit
77   side `off_t'.  Therefore we don't define _POSIX_V7_ILP32_OFFBIG.  */
78
79/* Environments with 64-bit wide pointers can be provided,
80   so these macros aren't defined:
81   # undef _POSIX_V7_LP64_OFF64
82   # undef _POSIX_V7_LPBIG_OFFBIG
83   # undef _POSIX_V6_LP64_OFF64
84   # undef _POSIX_V6_LPBIG_OFFBIG
85   # undef _XBS5_LP64_OFF64
86   # undef _XBS5_LPBIG_OFFBIG
87   and sysconf tests for it at runtime.  */
88
89#endif /* __WORDSIZE == 32 */
90
91#define __ILP32_OFF32_CFLAGS	"-m32"
92#define __ILP32_OFFBIG_CFLAGS	"-m32 -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
93#define __ILP32_OFF32_LDFLAGS	"-m32"
94#define __ILP32_OFFBIG_LDFLAGS	"-m32"
95#define __LP64_OFF64_CFLAGS	"-m64"
96#define __LP64_OFF64_LDFLAGS	"-m64"