1    	/* Copyright (C) 1999-2015 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   	   <http://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   	/* We have 32-bit wide `int', `long int' and pointers and all platforms
68   	   support LFS.  -mx32 has 64-bit wide `off_t'.  */
69   	# define _POSIX_V7_ILP32_OFFBIG	1
70   	# define _POSIX_V6_ILP32_OFFBIG 1
71   	# define _XBS5_ILP32_OFFBIG	1
72   	
73   	# ifndef __x86_64__
74   	/* -m32 has 32-bit wide `off_t'.  */
75   	#  define _POSIX_V7_ILP32_OFF32	1
76   	#  define _POSIX_V6_ILP32_OFF32	1
77   	#  define _XBS5_ILP32_OFF32	1
78   	# endif
79   	
80   	/* We optionally provide an environment with the above size but an 64-bit
81   	   side `off_t'.  Therefore we don't define _POSIX_V7_ILP32_OFFBIG.  */
82   	
83   	/* Environments with 64-bit wide pointers can be provided,
84   	   so these macros aren't defined:
85   	   # undef _POSIX_V7_LP64_OFF64
86   	   # undef _POSIX_V7_LPBIG_OFFBIG
87   	   # undef _POSIX_V6_LP64_OFF64
88   	   # undef _POSIX_V6_LPBIG_OFFBIG
89   	   # undef _XBS5_LP64_OFF64
90   	   # undef _XBS5_LPBIG_OFFBIG
91   	   and sysconf tests for it at runtime.  */
92   	
93   	#endif /* __WORDSIZE == 32 */
94   	
95   	#define __ILP32_OFF32_CFLAGS	"-m32"
96   	#define __ILP32_OFF32_LDFLAGS	"-m32"
97   	#if defined __x86_64__ && defined __ILP32__
98   	# define __ILP32_OFFBIG_CFLAGS	"-mx32"
99   	# define __ILP32_OFFBIG_LDFLAGS	"-mx32"
100  	#else
101  	# define __ILP32_OFFBIG_CFLAGS	"-m32 -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
102  	# define __ILP32_OFFBIG_LDFLAGS	"-m32"
103  	#endif
104  	#define __LP64_OFF64_CFLAGS	"-m64"
105  	#define __LP64_OFF64_LDFLAGS	"-m64"
106