https://bugs.freedesktop.org/show_bug.cgi?id=64810
--- Comment #8 from Johannes Obermayr johannesobermayr@gmx.de --- (In reply to comment #3)
I think the problem is that egl_gallium.so links both radeonsi and r600g, which have some conflicting symbols.
Maybe this patch helps: https://github.com/jobermayr/mesa/commit/27db605