The latest git version of mesa fails to build:
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make[3]: Entering directory '/home/jos/src/xorg/git/mesa/src/gallium/drivers/radeon'
  CC       cayman_msaa.lo
  CC       r600_buffer_common.lo
  CC       r600_gpu_load.lo
  CC       r600_pipe_common.lo
r600_pipe_common.c: In function 'r600_common_screen_init':
r600_pipe_common.c:887:23: error: 'MESA_LLVM_VERSION_PATCH' undeclared (first use in this function)
     HAVE_LLVM & 0xff, MESA_LLVM_VERSION_PATCH);
                       ^
r600_pipe_common.c:887:23: note: each undeclared identifier is reported only once for each function it appears in
Makefile:694: recipe for target 'r600_pipe_common.lo' failed
make[3]: *** [r600_pipe_common.lo] Error 1
make[3]: Leaving directory '/home/jos/src/xorg/git/mesa/src/gallium/drivers/radeon'
Makefile:577: recipe for target 'all-recursive' failed
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory '/home/jos/src/xorg/git/mesa/src/gallium'
Makefile:676: recipe for target 'all-recursive' failed
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory '/home/jos/src/xorg/git/mesa/src'
Makefile:618: recipe for target 'all-recursive' failed
make: *** [all-recursive] Error 1
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