zeevt/csnappy — pull request #15 by gray (2013-09-12 01:08:43+00:00)
Title: use correct compiler macro for DragonFlyBSD

Although i haven't tested this, the following two search results make it pretty clear it's right:
http://gitweb.dragonflybsd.org/dragonfly.git?a=search&s=__DragonFly__
http://gitweb.dragonflybsd.org/dragonfly.git?a=search&s=__DragonFlyBSD__