In short: The source code won't build with automake >= 1.13.1 because you're using an old macro in your configure.ac, that has been deprecated for years and has now finally been removed from automake 1.13.1 and beyond. Just replace the line AM_CONFIG_HEADER([config.h]) with the line AC_CONFIG_HEADERS([config.h]) and you'll be fine. We've had the same problem already a few months ago with xorg-video-openchrome, where I've also posted the same patch: https://bugs.freedesktop.org/show_bug.cgi?id=60368
umm, I'm not really sure where the "official" home for xf86-video-omapfb is, but it isn't freedesktop.org. (note that xf86-video-omapfb is something different from xf86-video-omap.. the former is something that uses the omapfb fbdev driver, the later is for omapdrm/kms driver)
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