If heirloom shell is in /usr/lib/heirloom/5bin/sh, use it to run tests.
[mmh] / m4 /
drwxr-xr-x   ..
-rw-r--r-- 1882 ndbm.m4
-rw-r--r-- 335 netlibs.m4
-rw-r--r-- 874 readline.m4