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diff --git a/linkers/elftoolchain/libelf/_libelf_config.h b/linkers/elftoolchain/libelf/_libelf_config.h
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+/*-
+ * Copyright (c) 2008-2011 Joseph Koshy
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $Id: _libelf_config.h 2032 2011-10-23 09:07:00Z jkoshy $
+ */
+
+#ifdef __FreeBSD__
+
+#define LIBELF_VCSID(ID) __FBSDID(ID)
+
+/*
+ * Define LIBELF_{ARCH,BYTEORDER,CLASS} based on the machine architecture.
+ * See also: <machine/elf.h>.
+ */
+
+#if defined(__amd64__)
+
+#define LIBELF_ARCH EM_X86_64
+#define LIBELF_BYTEORDER ELFDATA2LSB
+#define LIBELF_CLASS ELFCLASS64
+
+#elif defined(__arm__)
+
+#define LIBELF_ARCH EM_ARM
+#if defined(__ARMEB__) /* Big-endian ARM. */
+#define LIBELF_BYTEORDER ELFDATA2MSB
+#else
+#define LIBELF_BYTEORDER ELFDATA2LSB
+#endif
+#define LIBELF_CLASS ELFCLASS32
+
+#elif defined(__i386__)
+
+#define LIBELF_ARCH EM_386
+#define LIBELF_BYTEORDER ELFDATA2LSB
+#define LIBELF_CLASS ELFCLASS32
+
+#elif defined(__ia64__)
+
+#define LIBELF_ARCH EM_IA_64
+#define LIBELF_BYTEORDER ELFDATA2LSB
+#define LIBELF_CLASS ELFCLASS64
+
+#elif defined(__mips__)
+
+#define LIBELF_ARCH EM_MIPS
+#if defined(__MIPSEB__)
+#define LIBELF_BYTEORDER ELFDATA2MSB
+#else
+#define LIBELF_BYTEORDER ELFDATA2LSB
+#endif
+#define LIBELF_CLASS ELFCLASS32
+
+#elif defined(__powerpc__)
+
+#define LIBELF_ARCH EM_PPC
+#define LIBELF_BYTEORDER ELFDATA2MSB
+#define LIBELF_CLASS ELFCLASS32
+
+#elif defined(__sparc__)
+
+#define LIBELF_ARCH EM_SPARCV9
+#define LIBELF_BYTEORDER ELFDATA2MSB
+#define LIBELF_CLASS ELFCLASS64
+
+#else
+#error Unknown FreeBSD architecture.
+#endif
+#endif /* __FreeBSD__ */
+
+
+#ifdef __NetBSD__
+
+#include <machine/elf_machdep.h>
+
+#define LIBELF_VCSID(ID) __RCSID(ID)
+
+#if !defined(ARCH_ELFSIZE)
+#error ARCH_ELFSIZE is not defined.
+#endif
+
+#if ARCH_ELFSIZE == 32
+#define LIBELF_ARCH ELF32_MACHDEP_ID
+#define LIBELF_BYTEORDER ELF32_MACHDEP_ENDIANNESS
+#define LIBELF_CLASS ELFCLASS32
+#define Elf_Note Elf32_Nhdr
+#else
+#define LIBELF_ARCH ELF64_MACHDEP_ID
+#define LIBELF_BYTEORDER ELF64_MACHDEP_ENDIANNESS
+#define LIBELF_CLASS ELFCLASS64
+#define Elf_Note Elf64_Nhdr
+#endif
+
+#endif /* __NetBSD__ */
+
+#ifdef __APPLE__
+
+#define LIBELF_VCSID(ID)
+
+#if defined(__amd64__)
+
+#define LIBELF_ARCH EM_X86_64
+#define LIBELF_BYTEORDER ELFDATA2LSB
+#define LIBELF_CLASS ELFCLASS64
+
+#elif defined(__i386__)
+
+#define LIBELF_ARCH EM_386
+#define LIBELF_BYTEORDER ELFDATA2LSB
+#define LIBELF_CLASS ELFCLASS32
+
+#else
+#error Unknown Apple architecture.
+#endif
+
+#define roundup2 roundup
+
+#endif /* __APPLE__ */
+
+/*
+ * GNU & Linux compatibility.
+ *
+ * `__linux__' is defined in an environment runs the Linux kernel and glibc.
+ * `__GNU__' is defined in an environment runs a GNU kernel (Hurd) and glibc.
+ * `__GLIBC__' is defined for an environment that runs glibc over a non-GNU
+ * kernel such as GNU/kFreeBSD.
+ */
+
+#if defined(__linux__) || defined(__GNU__) || defined(__GLIBC__)
+
+#if defined(__linux__)
+
+#include "native-elf-format.h"
+
+#define LIBELF_CLASS ELFTC_CLASS
+#define LIBELF_ARCH ELFTC_ARCH
+#define LIBELF_BYTEORDER ELFTC_BYTEORDER
+
+#endif /* defined(__linux__) */
+
+#define LIBELF_VCSID(ID)
+
+#if LIBELF_CLASS == ELFCLASS32
+#define Elf_Note Elf32_Nhdr
+#elif LIBELF_CLASS == ELFCLASS64
+#define Elf_Note Elf64_Nhdr
+#else
+#error LIBELF_CLASS needs to be one of ELFCLASS32 or ELFCLASS64
+#endif
+
+#define roundup2 roundup
+
+#endif /* defined(__linux__) || defined(__GNU__) || defined(__GLIBC__) */
+
+#ifdef __WIN32__
+
+#define LIBELF_VCSID(ID)
+
+#if defined(__amd64__)
+
+#define LIBELF_ARCH EM_X86_64
+#define LIBELF_BYTEORDER ELFDATA2LSB
+#define LIBELF_CLASS ELFCLASS64
+
+#elif defined(__i386__)
+
+#define LIBELF_ARCH EM_386
+#define LIBELF_BYTEORDER ELFDATA2LSB
+#define LIBELF_CLASS ELFCLASS32
+
+#else
+#error Unknown Apple architecture.
+#endif
+
+#endif /* __APPLE__ */