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/** @file
* IPRT - Linux symver and compatibility definitions.
*/
/*
* Copyright (C) 2008-2019 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
/* Various tricks to produce binaries which can be run on old Linux
* distributions. This will almost certainly need updating as time
* goes by. */
#ifndef IPRT_INCLUDED_linux_symvers_h
#define IPRT_INCLUDED_linux_symvers_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
/* Please use -fno-stack-protector on the command line to avoid stack check
* functions which are not available in EL3 for 32-bit builds. */
/* Use versions of glibc symbols which are available in 32-bit EL3 or
* 64-bit EL4. Currently only those symbols needed by the Additions,
* though this could probably be extended to work for host builds too. */
#if defined(RT_ARCH_AMD64)
__asm__(".symver memcpy,memcpy@GLIBC_2.2.5");
__asm__(".symver posix_spawn,posix_spawn@GLIBC_2.2.5");
#else /* RT_ARCH_X86 */
__asm__(".symver posix_spawn,posix_spawn@GLIBC_2.2");
#endif
/* Do not use *_chk functions */
#undef _FORTIFY_SOURCE
/* Do not use __isoc99_* functions */
#undef __USE_GNU
#define __USE_GNU 1
/* And EL5 wants this too with __USE_GNU */
#undef _GNU_SOURCE
#define _GNU_SOURCE 1
/* Tell IPRT not to use newer functions */
#include <features.h>
#undef __GLIBC_MINOR__
#define __GLIBC_MINOR__ 3
/* Do not use fcntl64 */
#include <fcntl.h>
#ifdef fnctl
# undef fcntl
#endif
#if defined(RT_ARCH_AMD64)
__asm__(".symver fcntl64,fcntl@GLIBC_2.2.5");
#else
__asm__(".symver fcntl64,fcntl@GLIBC_2.0");
#endif
#endif /* !IPRT_INCLUDED_linux_symvers_h */
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