https://bugs.freedesktop.org/show_bug.cgi?id=62226
--- Comment #5 from Niels Ole Salscheider niels_ole@salscheider-online.de --- The problem seems to be that the build system picks the already installed libllvmradeon9.2.0.so (from /usr/lib64) instead of the one that has just been built.
A workaround is to uninstall mesa before compiling and installing the new version.