| 1 | /** @file
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| 2 | * IPRT - Linux symver and compatibility definitions.
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| 3 | */
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| 4 |
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| 5 | /*
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| 6 | * Copyright (C) 2008-2020 Oracle Corporation
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| 7 | *
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| 8 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 9 | * available from http://www.virtualbox.org. This file is free software;
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| 10 | * you can redistribute it and/or modify it under the terms of the GNU
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| 11 | * General Public License (GPL) as published by the Free Software
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| 12 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 13 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 14 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 15 | *
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| 16 | * The contents of this file may alternatively be used under the terms
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| 17 | * of the Common Development and Distribution License Version 1.0
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| 18 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 19 | * VirtualBox OSE distribution, in which case the provisions of the
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| 20 | * CDDL are applicable instead of those of the GPL.
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| 21 | *
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| 22 | * You may elect to license modified versions of this file under the
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| 23 | * terms and conditions of either the GPL or the CDDL or both.
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| 24 | */
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| 25 |
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| 26 | /* Various tricks to produce binaries which can be run on old Linux
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| 27 | * distributions. This will almost certainly need updating as time
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| 28 | * goes by. */
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| 29 |
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| 30 | #ifndef IPRT_INCLUDED_linux_symvers_h
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| 31 | #define IPRT_INCLUDED_linux_symvers_h
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| 32 | #ifndef RT_WITHOUT_PRAGMA_ONCE
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| 33 | # pragma once
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| 34 | #endif
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| 35 |
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| 36 | /* Please use -fno-stack-protector on the command line to avoid stack check
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| 37 | * functions which are not available in EL3 for 32-bit builds. */
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| 38 |
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| 39 | /* Use versions of glibc symbols which are available in 32-bit EL3 or
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| 40 | * 64-bit EL4. Currently only those symbols needed by the Additions,
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| 41 | * though this could probably be extended to work for host builds too. */
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| 42 | #if defined(RT_ARCH_AMD64)
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| 43 | __asm__(".symver memcpy,memcpy@GLIBC_2.2.5");
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| 44 | __asm__(".symver posix_spawn,posix_spawn@GLIBC_2.2.5");
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| 45 | #else /* RT_ARCH_X86 */
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| 46 | __asm__(".symver posix_spawn,posix_spawn@GLIBC_2.2");
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| 47 | #endif
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| 48 |
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| 49 | /* Do not use *_chk functions */
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| 50 | #undef _FORTIFY_SOURCE
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| 51 |
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| 52 | /* Do not use __isoc99_* functions */
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| 53 | #undef __USE_GNU
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| 54 | #define __USE_GNU 1
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| 55 |
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| 56 | /* And EL5 wants this too with __USE_GNU */
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| 57 | #undef _GNU_SOURCE
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| 58 | #define _GNU_SOURCE 1
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| 59 |
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| 60 | /* Tell IPRT not to use newer functions */
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| 61 | #include <features.h>
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| 62 | #undef __GLIBC_MINOR__
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| 63 | #define __GLIBC_MINOR__ 3
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| 64 |
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| 65 | /* Do not use fcntl64 */
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| 66 | #include <fcntl.h>
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| 67 | #ifdef fnctl
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| 68 | # undef fcntl
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| 69 | #endif
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| 70 | #if defined(RT_ARCH_AMD64)
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| 71 | __asm__(".symver fcntl64,fcntl@GLIBC_2.2.5");
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| 72 | #else
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| 73 | __asm__(".symver fcntl64,fcntl@GLIBC_2.0");
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| 74 | #endif
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| 75 |
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| 76 | /* Do not use ISO C99 scanf which has a glibc 2.7 dependency. */
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| 77 | #undef __GLIBC_USE_DEPRECATED_SCANF
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| 78 | #define __GLIBC_USE_DEPRECATED_SCANF 1
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| 79 | #endif /* !IPRT_INCLUDED_linux_symvers_h */
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