: simcmp
cc simcmp.c
mv a.out simcmp
: flubrun
cc -S flubrun.c
: stage2
cat flub.sim stg2.fl | simcmp >stg2.s 
as flubrun.s stg2.s
mv a.out b.out
ld b.out -lc -la
rm b.out stg2.s
mv a.out st2
