Hi Derek,

One of my colleagues suggested that you might be missing a C++ compiler
in your build environment.  I subsequently managed to reproduce the
issue you reported on a fresh CentOS 7 VM.

The solution to your problem is thus to install a C++ compiler, but we
can certainly handle this situation better by making sure the top-level
./configure fails if the "nested" ATF ./configure fails.  A patch which
makes this happen is currently in review.

Thank you again for reporting this.