V4/usr/sys/conf/rc

if ! -r l.s -o ! -r c.c goto bad
as l.s
mv a.out ../low.o
as mch.s
mv a.out ../mch.o
cc -c c.c
mv c.o ../conf.o
mv l.s low.s
mv c.c conf.c
ld -x ../low.o ../mch.o ../conf.o ../lib1 ../lib2
mv a.out ../../../unix
chmod 644 low.s conf.c ../low.o ../mch.o ../conf.o ../../../unix
echo rm mkconf.c and rc when done
exit
: bad
echo l.s or c.c not found