make $testfilestem.o
ld -shared -o $testfilestem.so $testfilestem.o
-sbcl --noinform --noprint --sysinit /dev/null --userinit /dev/null <<EOF
+${SBCL:-sbcl} <<EOF
(load-foreign '("$testfilestem.so"))
(def-alien-routine summish int (x int) (y int))
(assert (= (summish 10 20) 31))