[OMPI users] ompi_info hangs

[Robert Kubrick]

I am having problems building OMPI 1.2.7 on an Intel Xeon quad-core  
64 bits server. The compilation completes but ompi_info hangs after  
printing the OMPI version:

# ompi_info
1.2.7
I tried to run a few mpi applications on this same install and they  
do work fine. What can cause ompi_info to hang?