--- /dev/null
+#!/bin/sh
+#
+# This is a wrapper for xz to compress the kernel image using appropriate
+# compression options depending on the architecture.
+#
+# Author: Lasse Collin <lasse.collin@tukaani.org>
+#
+# This file has been put into the public domain.
+# You can do whatever you want with this file.
+#
+
+BCJ=
+LZMA2OPTS=
+
+case $ARCH in
+ x86|x86_64) BCJ=--x86 ;;
+ powerpc) BCJ=--powerpc ;;
+ ia64) BCJ=--ia64; LZMA2OPTS=pb=4 ;;
+ arm) BCJ=--arm ;;
+ sparc) BCJ=--sparc ;;
+esac
+
+exec xz --check=crc32 $BCJ --lzma2=$LZMA2OPTS,dict=32MiB