The required release levels for Red Hat Enterprise Linux 4.5 x86 32-bit and x86-64 64-bit are:
kernel-2.6.9-55ELsmp
glibc-2.3.4-2.36
gcc-3.4.6-8
The requirements for Red Hat Enterprise Linux 4.5 POWER 32-bit and 64-bit are:
kernel-2.6.9-55ELsmp
glibc-2.3.4-2.36
IBM XLC 8.0