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#!/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 $SRCARCH in
x86) BCJ=--x86 ;;
powerpc) BCJ=--powerpc ;;
ia64) BCJ=--ia64; LZMA2OPTS=pb=4 ;;
arm) BCJ=--arm$S64 ;;
sparc) BCJ=--sparc ;;
esac
if grep -q '^CONFIG_THUMB2_BAREBOX=y$' include/config/auto.conf; then
BCJ=--armthumb
fi
# clear BCJ filter if unsupported
if [ -n "${BCJ}" ]; then
xz -H | grep -q -- $BCJ || BCJ=
fi
exec xz --check=crc32 $BCJ --lzma2=$LZMA2OPTS,dict=32MiB
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