Run SLC4/32bit binaries on SLC5 64bit machine
or build on SLC5 with gcc 3.4.6 in 32/64bit mode

If you want only to run in 32 bit you need to check inside

http://linuxsoft.cern.ch/cern/slc5X/i386/SL

http://linuxsoft.cern.ch/cern/slc5X/i386/updates/RPMS/

for the latest versions of

To install, you may use the following command:

yum install compat-glibc compat-glibc-headers compat-libf2c-34 compat-libgcc-296 compat-libstdc++-296 compat-libstdc++-33 compat-readline43 lapack-3.0-37.el5 libgfortran-4.1.2 ghostscript-8.15.2 libXpm-3.5.5 glibc-devel-2.5 giflib compat-openldap openssl097a-0.9.7a-9.el5_2.1 openssl-0.9.8e-12.el5_4.1 compat-db-4.2.52-5.1

SLC4 binaries should run without problems on SLC5/32 bit architecture.