GLIBC_2.2.5 on SuSE 8.1

Hi, I've found a strange problem with building binaries on the x86-64 release of SuSE 8.1: Building any program (even a simple 'Hello world') seems to generate a binary with a GLIBC_2.2.5 dependency - consequently, the binary refuses to run on other x86-64 distributions with later glibc versions. (But oddly enough, the same binary does run on a SuSE 8.2 beta with glibc 2.3.2). Is this a known problem? (I've searched around but can find no mention of this issue) My only guess is that there is something odd in either the glibc on the machine, or with the gcc that creates the binaries, but I've no idea what I can do to fix it or work around the problem. The machine producing the binaries is using SuSE's gcc 3.2.2, Thanks, Ben