1 /* Copyright (C) 1999, 2001, 2004, 2009 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_V7_ILP32_OFF32 32bit int, long, pointers, and off_t type 31 _POSIX_V7_ILP32_OFFBIG 32bit int, long, and pointers and larger off_t type 32 33 _POSIX_V7_LP64_OFF32 64bit long and pointers and 32bit off_t type 34 _POSIX_V7_LPBIG_OFFBIG 64bit long and pointers and large off_t type 35 36 The macros _POSIX_V6_ILP32_OFF32, _POSIX_V6_ILP32_OFFBIG, 37 _POSIX_V6_LP64_OFF32, _POSIX_V6_LPBIG_OFFBIG, _XBS5_ILP32_OFF32, 38 _XBS5_ILP32_OFFBIG, _XBS5_LP64_OFF32, and _XBS5_LPBIG_OFFBIG were 39 used in previous versions of the Unix standard and are available 40 only for compatibility. 41 */ 42 43 #if __WORDSIZE == 64 44 45 /* Environments with 32-bit wide pointers are optionally provided. 46 Therefore following macros aren't defined: 47 # undef _POSIX_V7_ILP32_OFF32 48 # undef _POSIX_V7_ILP32_OFFBIG 49 # undef _POSIX_V6_ILP32_OFF32 50 # undef _POSIX_V6_ILP32_OFFBIG 51 # undef _XBS5_ILP32_OFF32 52 # undef _XBS5_ILP32_OFFBIG 53 and users need to check at runtime. */ 54 55 /* We also have no use (for now) for an environment with bigger pointers 56 and offsets. */ 57 # define _POSIX_V7_LPBIG_OFFBIG -1 58 # define _POSIX_V6_LPBIG_OFFBIG -1 59 # define _XBS5_LPBIG_OFFBIG -1 60 61 /* By default we have 64-bit wide `long int', pointers and `off_t'. */ 62 # define _POSIX_V7_LP64_OFF64 1 63 # define _POSIX_V6_LP64_OFF64 1 64 # define _XBS5_LP64_OFF64 1 65 66 #else /* __WORDSIZE == 32 */ 67 68 /* By default we have 32-bit wide `int', `long int', pointers and `off_t' 69 and all platforms support LFS. */ 70 # define _POSIX_V7_ILP32_OFF32 1 71 # define _POSIX_V7_ILP32_OFFBIG 1 72 # define _POSIX_V6_ILP32_OFF32 1 73 # define _POSIX_V6_ILP32_OFFBIG 1 74 # define _XBS5_ILP32_OFF32 1 75 # define _XBS5_ILP32_OFFBIG 1 76 77 /* We optionally provide an environment with the above size but an 64-bit 78 side `off_t'. Therefore we don't define _POSIX_V7_ILP32_OFFBIG. */ 79 80 /* Environments with 64-bit wide pointers can be provided, 81 so these macros aren't defined: 82 # undef _POSIX_V7_LP64_OFF64 83 # undef _POSIX_V7_LPBIG_OFFBIG 84 # undef _POSIX_V6_LP64_OFF64 85 # undef _POSIX_V6_LPBIG_OFFBIG 86 # undef _XBS5_LP64_OFF64 87 # undef _XBS5_LPBIG_OFFBIG 88 and sysconf tests for it at runtime. */ 89 90 #endif /* __WORDSIZE == 32 */ 91 92 #define __ILP32_OFF32_CFLAGS "-m32" 93 #define __ILP32_OFFBIG_CFLAGS "-m32 -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64" 94 #define __ILP32_OFF32_LDFLAGS "-m32" 95 #define __ILP32_OFFBIG_LDFLAGS "-m32" 96 #define __LP64_OFF64_CFLAGS "-m64" 97 #define __LP64_OFF64_LDFLAGS "-m64" 98