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 /* Environments with 32-bit wide pointers are optionally provided. 44 Therefore following macros aren't defined: 45 # undef _POSIX_V6_ILP32_OFF32 46 # undef _POSIX_V6_ILP32_OFFBIG 47 # undef _XBS5_ILP32_OFF32 48 # undef _XBS5_ILP32_OFFBIG 49 and users need to check at runtime. */ 50 51 /* We also have no use (for now) for an environment with bigger pointers 52 and offsets. */ 53 # define _POSIX_V6_LPBIG_OFFBIG -1 54 # define _XBS5_LPBIG_OFFBIG -1 55 56 /* By default we have 64-bit wide `long int', pointers and `off_t'. */ 57 # define _POSIX_V6_LP64_OFF64 1 58 # define _XBS5_LP64_OFF64 1 59 60 #else /* __WORDSIZE == 32 */ 61 62 /* By default we have 32-bit wide `int', `long int', pointers and `off_t' 63 and all platforms support LFS. */ 64 # define _POSIX_V6_ILP32_OFF32 1 65 # define _POSIX_V6_ILP32_OFFBIG 1 66 # define _XBS5_ILP32_OFF32 1 67 # define _XBS5_ILP32_OFFBIG 1 68 69 /* We optionally provide an environment with the above size but an 64-bit 70 side `off_t'. Therefore we don't define _XBS5_ILP32_OFFBIG. */ 71 72 /* Environments with 64-bit wide pointers can be provided, 73 so these macros aren't defined: 74 # undef _POSIX_V6_LP64_OFF64 75 # undef _POSIX_V6_LPBIG_OFFBIG 76 # undef _XBS5_LP64_OFF64 77 # undef _XBS5_LPBIG_OFFBIG 78 and sysconf tests for it at runtime. */ 79 80 #endif /* __WORDSIZE == 32 */ 81 82 #define __ILP32_OFF32_CFLAGS "-m32" 83 #define __ILP32_OFFBIG_CFLAGS "-m32 -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64" 84 #define __ILP32_OFF32_LDFLAGS "-m32" 85 #define __ILP32_OFFBIG_LDFLAGS "-m32" 86 #define __LP64_OFF64_CFLAGS "-m64" 87 #define __LP64_OFF64_LDFLAGS "-m64" 88
