To rebuild the Open MPI SRPM, use the following argument:

rpmbuild --rebuild --define "oscar 1" --define "_packager YOUR_NAME <YOUR_EMAIL>" \
  --define "_vendor OSCAR" --define "configure_options --with-tm=/opt/pbs" \
  openmpi-1.0.2-1.src.rpm

Remember to update the command with your name and email address.
