I downloaded the openmpi-1.4a1r19231 nightly and trying to configure it without RTE support. It doesn't seem to recognize the without-rte-support configure flag, or so it seems.
It goes on well with "with-rte=no".
$ ./configure --without-rte-support
configure: WARNING: Unrecognized options: --without-rte-support
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane...
Also, any additional information I can get on this option would be great. I tried to dig up for anything on this -- the only thing I found is the original changeset 18664 by Ralph