Hi, I'm seeing a simular problem when building openct on amd64 that is caused by including usbdevice_fs.h. A buildd log is available at: http://amd64.ftbfs.de/fetch.php?&pkg=openct&ver=0.6.5-2&arch=amd64&stamp=1126228644&file=log&as=raw The first problem here is that div64.h uses BIT_PER_LONG, which is __KERNEL__ only. The rest is probably simular. Kurt