t / t5100 / info0013on commit git-compat-util.h: don't define _XOPEN_SOURCE on cygwin (3a0a3a8)
   1Author: A U Thor
   2Email: a.u.thor@example.com
   3Subject: a patch
   4Date: Fri, 9 Jun 2006 00:44:16 -0700
   5