Just to report a successfull compilation and installation of PostgreSQL 8.0.0rc5 on Intel EM64T with Red Hat ES v3.0 update 4 with options "with-openssl --enable-thread-safety" using the following tweak: ln -s /usr/kerberos/include/* /usr/include/
[root@pgserv bin]# cat /etc/redhat-release Red Hat Enterprise Linux ES release 3 (Taroon Update 4)
[root@pgserv bin]# pwd /usr/local/pgsql/bin [root@pgserv bin]# file postgres postgres: ELF 64-bit LSB executable, AMD x86-64, version 1 (SYSV), for GNU/Linux 2.4.0, dynamically linked (uses shared libs), not stripped