autoconf is going nuts, it takes 100% of my CPU

[Mo DeJong]

Has anyone ever run into a problem like this before?
I ran autoconf and it started sucking up all my CPU
time. Here is the configure.in that causes the problem.

mo(~)% autoconf
/usr/bin/m4: memory exhausted

AC_INIT(foo)


AC_DEFUN(FOO, [
    foo_cmd="$FOO $FOO_FLAGS arg"
    echo $foo_cmd
])

FOO


Any ideas?
Mo Dejong
Red Hat Inc.