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106 lines
3.7 KiB
C
106 lines
3.7 KiB
C
/* Copyright (C) 1999-2023 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _UNISTD_H
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# error "Never include this file directly. Use <unistd.h> instead"
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#endif
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#include <bits/wordsize.h>
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/* This header should define the following symbols under the described
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situations. A value `1' means that the model is always supported,
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`-1' means it is never supported. Undefined means it cannot be
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statically decided.
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_POSIX_V7_ILP32_OFF32 32bit int, long, pointers, and off_t type
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_POSIX_V7_ILP32_OFFBIG 32bit int, long, and pointers and larger off_t type
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_POSIX_V7_LP64_OFF32 64bit long and pointers and 32bit off_t type
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_POSIX_V7_LPBIG_OFFBIG 64bit long and pointers and large off_t type
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The macros _POSIX_V6_ILP32_OFF32, _POSIX_V6_ILP32_OFFBIG,
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_POSIX_V6_LP64_OFF32, _POSIX_V6_LPBIG_OFFBIG, _XBS5_ILP32_OFF32,
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_XBS5_ILP32_OFFBIG, _XBS5_LP64_OFF32, and _XBS5_LPBIG_OFFBIG were
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used in previous versions of the Unix standard and are available
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only for compatibility.
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*/
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#if __WORDSIZE == 64
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/* Environments with 32-bit wide pointers are optionally provided.
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Therefore following macros aren't defined:
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# undef _POSIX_V7_ILP32_OFF32
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# undef _POSIX_V7_ILP32_OFFBIG
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# undef _POSIX_V6_ILP32_OFF32
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# undef _POSIX_V6_ILP32_OFFBIG
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# undef _XBS5_ILP32_OFF32
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# undef _XBS5_ILP32_OFFBIG
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and users need to check at runtime. */
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/* We also have no use (for now) for an environment with bigger pointers
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and offsets. */
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# define _POSIX_V7_LPBIG_OFFBIG -1
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# define _POSIX_V6_LPBIG_OFFBIG -1
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# define _XBS5_LPBIG_OFFBIG -1
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/* By default we have 64-bit wide `long int', pointers and `off_t'. */
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# define _POSIX_V7_LP64_OFF64 1
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# define _POSIX_V6_LP64_OFF64 1
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# define _XBS5_LP64_OFF64 1
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#else /* __WORDSIZE == 32 */
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/* We have 32-bit wide `int', `long int' and pointers and all platforms
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support LFS. -mx32 has 64-bit wide `off_t'. */
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# define _POSIX_V7_ILP32_OFFBIG 1
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# define _POSIX_V6_ILP32_OFFBIG 1
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# define _XBS5_ILP32_OFFBIG 1
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# ifndef __x86_64__
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/* -m32 has 32-bit wide `off_t'. */
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# define _POSIX_V7_ILP32_OFF32 1
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# define _POSIX_V6_ILP32_OFF32 1
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# define _XBS5_ILP32_OFF32 1
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# endif
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/* We optionally provide an environment with the above size but an 64-bit
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side `off_t'. Therefore we don't define _POSIX_V7_ILP32_OFFBIG. */
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/* Environments with 64-bit wide pointers can be provided,
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so these macros aren't defined:
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# undef _POSIX_V7_LP64_OFF64
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# undef _POSIX_V7_LPBIG_OFFBIG
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# undef _POSIX_V6_LP64_OFF64
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# undef _POSIX_V6_LPBIG_OFFBIG
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# undef _XBS5_LP64_OFF64
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# undef _XBS5_LPBIG_OFFBIG
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and sysconf tests for it at runtime. */
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#endif /* __WORDSIZE == 32 */
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#define __ILP32_OFF32_CFLAGS "-m32"
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#define __ILP32_OFF32_LDFLAGS "-m32"
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#if defined __x86_64__ && defined __ILP32__
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# define __ILP32_OFFBIG_CFLAGS "-mx32"
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# define __ILP32_OFFBIG_LDFLAGS "-mx32"
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#else
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# define __ILP32_OFFBIG_CFLAGS "-m32 -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
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# define __ILP32_OFFBIG_LDFLAGS "-m32"
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#endif
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#define __LP64_OFF64_CFLAGS "-m64"
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#define __LP64_OFF64_LDFLAGS "-m64"
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