openwrt-packages-dist/utils/lxc/patches/020-lxc-checkconfig.patch

--- a/src/lxc/cmd/lxc-checkconfig.in
+++ b/src/lxc/cmd/lxc-checkconfig.in
@@ -4,6 +4,17 @@
 # Allow environment variables to override config
 : ${CONFIG:=/proc/config.gz}
 : ${MODNAME:=configs}
+: ${ZGREP:=zgrep}
+: ${GUNZIP:=gunzip}
+
+if [ -z $(which $ZGREP) ] && ! [ -z $(which $GUNZIP) ] && [ -x $(which $GUNZIP) ] &&  [ -f $CONFIG ] && [ "$CONFIG" == "/proc/config.gz" ] ; then
+
+	CONFIG_NEW="/tmp/config-$(uname -r)"
+	$GUNZIP -c $CONFIG > $CONFIG_NEW
+	CONFIG=$CONFIG_NEW
+
+	GREP=grep
+fi
 
 CAT="cat"