SOURCES_x11 = \ x11.c \ xcommon.c \ xcommon.h \ $(NULL) SOURCES_xvideo = \ xvideo.c \ xcommon.c \ xcommon.h \ $(NULL) SOURCES_glx = \ glx.c \ xcommon.c \ xcommon.h \ $(NULL) SOURCES_xvmc = \ xvmc.c \ xcommon.c \ xcommon.h \ $(NULL)