On Sun, Feb 3, 2013 at 13:29:04 +0100, Paul Menzel wrote: > I was surprised too that no error was generated. Do you have any idea > why compilations succeeds? > Fails to build here with ../../../src/xvmc/intel_xvmc.c:29:25: fatal error: xcb/xcb_aux.h: No such file or directory Also, shared libraries, as opposed to executable binaries, are allowed to have undefined symbols. Try this: -libIntelXvMC_la_LDFLAGS = -version-number 1:0:0 +libIntelXvMC_la_LDFLAGS = -version-number 1:0:0 -Wl,-z,defs Cheers, Julien