psql dumps core

Hi!

My psql frontend immediately dumps core when run while
the backend runs fine on the same machine.

Please note the following before I provide the details:
I _doubt_ that it is a bug in PostgreSQL. Rather, I think
that my machine setup (e.g. wrong/multiple shared libs versions?)
is screwed because everything works at a different machine having
same hardware and OS.
However, I've no idea where to post else (any hints are appreciated!)
and perhaps you can still help me. Therefore my apologies for this false
"bug" report in advance...

Now for the details. If you're reading this, you haven't quit yet.
Thank you!

Architecture: Sun/Sparq (sun4u SUNW,Ultra-4)
          OS: Solaris 2.6
  PostgreSQL: 7.3.3 (I have the problem with 7.3.2 too)
    Compiler: gcc 2.95.3

After installing I recompiled with debug info and tried the following:

.../postgresql-7.3.3# ./src/bin/psql/psql -V
Segmentation fault (core dumped)
.../postgresql-7.3.3# gdb ./src/bin/psql/psql core
GNU gdb 4.17
...
This GDB was configured as "sparc-sun-solaris2.6"...
Core was generated by `./src/bin/psql/psql -V'.
Program terminated with signal 11, Segmentation Fault.
Reading symbols from /usr/local/pgsql/lib/libpq.so.3...done.
Reading symbols from /usr/local/ssl/lib/libssl.so.0.9.6...done.
Reading symbols from /usr/local/ssl/lib/libcrypto.so.0.9.6...done.
Reading symbols from /usr/local/lib/libz.so...done.
Reading symbols from /usr/local/lib/libreadline.so.4...done.
Reading symbols from /usr/lib/libposix4.so.1...done.
Reading symbols from /usr/lib/libresolv.so.2...done.
Reading symbols from /usr/lib/libsocket.so.1...done.
Reading symbols from /usr/lib/libnsl.so.1...done.
Reading symbols from /usr/lib/libdl.so.1...done.
Reading symbols from /usr/lib/libm.so.1...done.
Reading symbols from /usr/lib/libc.so.1...done.
Reading symbols from /usr/lib/libaio.so.1...done.
Reading symbols from /usr/lib/libmp.so.2...done.
Reading symbols from /usr/platform/SUNW,Ultra-4/lib/libc_psr.so.1...done.
#0  0xef7436bc in __register_frame_info (begin=0xef770000, ob=0xef770000)
at /var/tmp/gcc-2.95.2/gcc/frame.c:627
/var/tmp/gcc-2.95.2/gcc/frame.c:627: No such file or directory.
(gdb) bt
#0  0xef7436bc in __register_frame_info (begin=0xef770000, ob=0xef770000)
at /var/tmp/gcc-2.95.2/gcc/frame.c:627
#1  0xef774d7c in frame_dummy ()
#2  0xef774c60 in _init ()
#3  0xef7ca88c in ?? ()
#4  0xef7ca6c8 in ?? ()
#5  0xef7d34ac in ?? ()
#6  0xef7c29bc in ?? ()
(gdb) quit

Please note the reference to /var/tmp/gcc-2.95.2 !
Despite that directory doesn't exist, there is no gcc-2.95.2 installed
anymore.

I'm lost. Any ideas where to look further?
Thanks again!

Regards, Walter