Makefile.src didn't know about 'sndprocs.h' yet.
Something weird is going on with 'make depend'. It has started
adding a trailing space to
|$(TARGETPFX)cppregex.o: ../sys/share/cppregex.cpp $(CONFIG_H)
(actual trailing space omitted here). It's repeatable. I don't
understand it and have not tried to fix it, just removed the space
from the generated Makefile before putting into place as modified
Makefile.src and making this commit.
87c3d07645