To make the cmix kernel
cd Minc
make load
cd ../sys
make core.o
cd ../lib
make genlib.a

then in each of the other individual directories consult the local
makefile to see what you want to make.  In cmd/ make uumix, to 
make the general purpose mixing and sound editing program.
For a complete list of builtin Minc functions see ug_intro.c in the
sys/ directory.
