u-boot/u-boot/tools/setlocalversion

#!/bin/sh
# Print additional version information for non-release trees.

usage() {
	echo "Usage: $0 [srctree]" >&2
	exit 1
}

cd "${1:-.}" || usage

if version=$(git describe --dirty --always --match="ar9331-v*" 2>/dev/null) ; then
	echo "-$version"
fi