Please, please, please update util-macros when pushing out new dists. The recent libX11, libXt, libXaw, and others aren't cross-compile friendly because they were autoconf'd with util-macros that are missing a patch that was committed and released over a month ago. http://cgit.freedesktop.org/xorg/util/macros/commit/?id=b885bb59ec23bb338c8df68e40c6ef2c2a9325cc