Problems running regression tests on Solaris 7 X86.

I am trying to run the regression tests on a Solaris 7 x86 box under
Postgres 6.5.3.  I've never had problems with other versions (last used
6.4) before.  Here is the error listing from make all runtest.

=============== destroying old regression database... =================
=============== creating new regression database...   =================
=============== installing PL/pgSQL...                =================
Cannot find the file /opt/local/pgsql/lib/plpgsql.so
This shared object contains the call handler for PL/pgSQL.
By default, only PL/pgSQL is built and installed. Other
languages must be explicitly enabled at configure.

To install PL/Tcl make sure the option --with-tcl is
given to configure, then recompile and install.
createlang failed
ACTUAL RESULTS OF REGRESSION TEST ARE NOW IN FILE regress.out

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