Not all 'sort' implementations support -o which is required by glusterd in glusterd_volume_compute_cksum(). Either assert the support in configure.ac or redirect the stdout fd programatically.
CHANGE: http://review.gluster.com/395 (The result of sorting the volume info file has) merged in master by Vijay Bellur (vijay)
CHANGE: http://review.gluster.com/453 (fixed for fd leaking. reopening of file was not needed) merged in master by Vijay Bellur (vijay)