Installing Postgres 6.4 on SGI IRIX 6.5

I had no trouble installing Postgres 6.4 onto my RH Linux 5.1 box.
However, I can't seem to get past the configure point for my SGI's
running IRIX 6.5.

I run configure --with-template=irix5 and get the error "can't create
executables with gcc". I am pretty sure that the gcc on our machine is
for previous versions of IRIX (< IRIX 6.3) so I think that that's the
problem. Can't I just use cc to compile?

Does anyone know how I can tweak my system so that this will install?

Thanks.
-Tony