The attached patch should be sufficient to fix libpgtcl. It requires

The attached patch should be sufficient to fix libpgtcl. It requires
PostgreSQL to support unicode-conversion, but retains binary
compatibility among Tcl versions.

However, it neither checks at compile time not at runtime, if support
for unicode-conversion does really exist and it doesn't prevent the
user from changing the client encoding after initialization. I think
there should be warnings about this somewhere in the documentation.

Reinhard Max