pgtcl installation problem

I have installed postgresql 8.2.0 and pgtclng 1.5.3 but the
installation of pgtclng 1.5.3 is faulty. I hope someone can tell me
what I'm doing wrong.

I try to run this script (named see):

#!/usr/local/bin/tclsh
package require Pgtcl
set fd [pg_connect -conninfo "host = localhost dbname = mtw"]

and get this response:

couldn't load file "/usr/local/lib/pgtcl1.5.3/libpgtcl1.5.3.so":
/usr/local/lib/pgtcl1.5.3/libpgtcl1.5.3.so: undefined symbol:
lo_export
while executing
"load /usr/local/lib/pgtcl1.5.3/libpgtcl1.5.3.so pgtcl"
("package ifneeded" script)
invoked from within
"package require Pgtcl"
(file "./see" line 2)

With nm /usr/local/lib/pgtcl1.5.3/libpgtcl1.5.3.so I see

U lo_close
U lo_creat
U lo_export
U lo_import
U lo_lseek
U lo_open
U lo_read
U lo_tell
U lo_unlink
U lo_write
U memcpy@@GLIBC_2.0

but

00005740 T Pg_lo_close
00004f80 T Pg_lo_creat
00004a70 T Pg_lo_export
00004bd0 T Pg_lo_import
000051c0 T Pg_lo_lseek
00005860 T Pg_lo_open
00005560 T Pg_lo_read
00004e40 T Pg_lo_tell
00004d20 T Pg_lo_unlink
000053e0 T Pg_lo_write

This is on Linux, fairly up-to-date.

Hope someone can help. I have been using an earlier version of pgtcl
with postgresql 8.1 but now I'm lost and stuck.

Dunno why I see
U memcpy@@GLIBC_2.0
because I have /lib/libc-2.4.so. But I have very little understanding
this stuff (the linker).

--Mike Talbot-Wilson