Problems installing pltcl

Hello all,
I tried to install PostgreSQL 7.0.2. Everything looked fine but the file
'pltcl.so' was not installed. But this is needed for creating functions
in TCL! What did make I wrong?
The configuration file said TCL enabled!

Here the facts:
PostgreSQL 7.0.2 on i686-pc-linux-gnu, compiled by gcc egcs-2.91.66
Configure:
./configure --prefix=/opt/local/DWH --with-tcl
--exec_prefix=/opt/local/DWH --with-tclconfig=/opt/local/DWH/lib
--with-x --with-tkconfig=/opt/local/DWH/lib

help requested,
Peter
--
Bezirksfinanzdirektion Muenchen
Vermessungsabteilung
.........................................................
Peter Keller : Tel: (+49) 089-2190-2594
Vermessungsrat z.A.: Fax: (+49) 089-2190-2459
Alexandrastr. 3 : mailto:Peter(dot)Keller(at)bvv(dot)bayern(dot)de
80538 Muenchen : web: http://www.bayern.de/vermessung