[R] Installing Rmpi on Centos 5.2

[Rick Bilonick]

I am trying to install the R package "Rmpi" which needs libmpi. I've
installed openmpi and lam in Centos 5.2:

[root at rab45-1 /]# rpm -qv openmpi
openmpi-1.2.5-5.el5
openmpi-1.2.5-5.el5
[root at rab45-1 /]# rpm -qv lam
lam-7.1.2-14.el5
lam-7.1.2-14.el5

I'm using this to install Rmpi:

R CMD INSTALL /home/rick/Rmpi_0.5-7.tar.gz
--with-mpi=/usr/lib64/lam/include

But I get the following error message:

/usr/bin/ld: skipping incompatible /usr/lib/lam/lib/libmpi.so when
searching for -lmpi

I'm not sure what else to install/uninstall to fix this.

Rick B.