+check4progs mkisofs stat || exit 1
+
+# allow overriding via environment:
+if [ -z "$MKSQUASHFS" ] ; then
+ if which mksquashfs-lzma >/dev/null 2>&1 ; then
+ MKSQUASHFS=mksquashfs-lzma
+ elif which mksquashfs >/dev/null 2>&1 ; then
+ MKSQUASHFS=mksquashfs
+ else
+ echo "Error: neither mksquashfs-lzma nor mksquashfs present. Exiting."
+ exit 1
+ fi
+fi