joyent/smartos-live — pull request #20 by richlowe (2011-12-16 05:21:55+00:00)
Title: Makefile: Explicitly use gtar, for -O

Illumos tar doesn't support `-O`, explicitly call `gtar` to be sure we always get GNU tar.

John tells me that this should work even while building under SmartOS, but I've not actually tried that to confirm.