| 1 | /* Copyright (C) 1999-2016 Free Software Foundation, Inc. |
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| 2 | This file is part of the GNU C Library. |
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| 3 | |
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| 4 | The GNU C Library is free software; you can redistribute it and/or |
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| 5 | modify it under the terms of the GNU Lesser General Public |
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| 6 | License as published by the Free Software Foundation; either |
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| 7 | version 2.1 of the License, or (at your option) any later version. |
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| 8 | |
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| 9 | The GNU C Library is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | Lesser General Public License for more details. |
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| 13 | |
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| 14 | You should have received a copy of the GNU Lesser General Public |
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| 15 | License along with the GNU C Library; if not, see |
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| 16 | <http://www.gnu.org/licenses/>. */ |
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| 17 | |
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| 18 | #ifndef _UNISTD_H |
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| 19 | # error "Never include this file directly. Use <unistd.h> instead" |
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| 20 | #endif |
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| 21 | |
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| 22 | #include <bits/wordsize.h> |
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| 23 | |
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| 24 | /* This header should define the following symbols under the described |
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| 25 | situations. A value `1' means that the model is always supported, |
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| 26 | `-1' means it is never supported. Undefined means it cannot be |
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| 27 | statically decided. |
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| 28 | |
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| 29 | _POSIX_V7_ILP32_OFF32 32bit int, long, pointers, and off_t type |
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| 30 | _POSIX_V7_ILP32_OFFBIG 32bit int, long, and pointers and larger off_t type |
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| 31 | |
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| 32 | _POSIX_V7_LP64_OFF32 64bit long and pointers and 32bit off_t type |
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| 33 | _POSIX_V7_LPBIG_OFFBIG 64bit long and pointers and large off_t type |
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| 34 | |
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| 35 | The macros _POSIX_V6_ILP32_OFF32, _POSIX_V6_ILP32_OFFBIG, |
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| 36 | _POSIX_V6_LP64_OFF32, _POSIX_V6_LPBIG_OFFBIG, _XBS5_ILP32_OFF32, |
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| 37 | _XBS5_ILP32_OFFBIG, _XBS5_LP64_OFF32, and _XBS5_LPBIG_OFFBIG were |
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| 38 | used in previous versions of the Unix standard and are available |
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| 39 | only for compatibility. |
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| 40 | */ |
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| 41 | |
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| 42 | #if __WORDSIZE == 64 |
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| 43 | |
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| 44 | /* Environments with 32-bit wide pointers are optionally provided. |
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| 45 | Therefore following macros aren't defined: |
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| 46 | # undef _POSIX_V7_ILP32_OFF32 |
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| 47 | # undef _POSIX_V7_ILP32_OFFBIG |
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| 48 | # undef _POSIX_V6_ILP32_OFF32 |
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| 49 | # undef _POSIX_V6_ILP32_OFFBIG |
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| 50 | # undef _XBS5_ILP32_OFF32 |
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| 51 | # undef _XBS5_ILP32_OFFBIG |
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| 52 | and users need to check at runtime. */ |
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| 53 | |
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| 54 | /* We also have no use (for now) for an environment with bigger pointers |
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| 55 | and offsets. */ |
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| 56 | # define _POSIX_V7_LPBIG_OFFBIG -1 |
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| 57 | # define _POSIX_V6_LPBIG_OFFBIG -1 |
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| 58 | # define _XBS5_LPBIG_OFFBIG -1 |
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| 59 | |
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| 60 | /* By default we have 64-bit wide `long int', pointers and `off_t'. */ |
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| 61 | # define _POSIX_V7_LP64_OFF64 1 |
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| 62 | # define _POSIX_V6_LP64_OFF64 1 |
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| 63 | # define _XBS5_LP64_OFF64 1 |
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| 64 | |
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| 65 | #else /* __WORDSIZE == 32 */ |
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| 66 | |
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| 67 | /* We have 32-bit wide `int', `long int' and pointers and all platforms |
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| 68 | support LFS. -mx32 has 64-bit wide `off_t'. */ |
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| 69 | # define _POSIX_V7_ILP32_OFFBIG 1 |
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| 70 | # define _POSIX_V6_ILP32_OFFBIG 1 |
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| 71 | # define _XBS5_ILP32_OFFBIG 1 |
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| 72 | |
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| 73 | # ifndef __x86_64__ |
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| 74 | /* -m32 has 32-bit wide `off_t'. */ |
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| 75 | # define _POSIX_V7_ILP32_OFF32 1 |
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| 76 | # define _POSIX_V6_ILP32_OFF32 1 |
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| 77 | # define _XBS5_ILP32_OFF32 1 |
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| 78 | # endif |
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| 79 | |
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| 80 | /* We optionally provide an environment with the above size but an 64-bit |
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| 81 | side `off_t'. Therefore we don't define _POSIX_V7_ILP32_OFFBIG. */ |
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| 82 | |
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| 83 | /* Environments with 64-bit wide pointers can be provided, |
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| 84 | so these macros aren't defined: |
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| 85 | # undef _POSIX_V7_LP64_OFF64 |
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| 86 | # undef _POSIX_V7_LPBIG_OFFBIG |
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| 87 | # undef _POSIX_V6_LP64_OFF64 |
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| 88 | # undef _POSIX_V6_LPBIG_OFFBIG |
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| 89 | # undef _XBS5_LP64_OFF64 |
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| 90 | # undef _XBS5_LPBIG_OFFBIG |
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| 91 | and sysconf tests for it at runtime. */ |
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| 92 | |
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| 93 | #endif /* __WORDSIZE == 32 */ |
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| 94 | |
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| 95 | #define __ILP32_OFF32_CFLAGS "-m32" |
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| 96 | #define __ILP32_OFF32_LDFLAGS "-m32" |
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| 97 | #if defined __x86_64__ && defined __ILP32__ |
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| 98 | # define __ILP32_OFFBIG_CFLAGS "-mx32" |
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| 99 | # define __ILP32_OFFBIG_LDFLAGS "-mx32" |
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| 100 | #else |
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| 101 | # define __ILP32_OFFBIG_CFLAGS "-m32 -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64" |
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| 102 | # define __ILP32_OFFBIG_LDFLAGS "-m32" |
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| 103 | #endif |
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| 104 | #define __LP64_OFF64_CFLAGS "-m64" |
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| 105 | #define __LP64_OFF64_LDFLAGS "-m64" |
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| 106 | |
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