$ make depend
Makefile:5: config.mak: No such file or directory
libavdevice/Makefile:1: libavdevice/../config.mak: No such file or directory
libavformat/Makefile:5: libavformat/../config.mak: No such file or directory
libavcodec/Makefile:5: libavcodec/../config.mak: No such file or directory
libavutil/Makefile:1: libavutil/../config.mak: No such file or directory
make: *** No rule to make target `libavutil/../config.mak'.  Stop.