You need to unzip one of the ones under EQEmuLoginServer/login_util/linux depending on your distro/architecture and copy it into the same directory as the EQEmuLoginServer source.
If your distro doesn't match the pre-compiled ones exactly, just try each of them to see if you find one that works. E.g. I use Debian Linux 32 bit, one of them worked for me (probably the Ubuntu 32 bit one).
EDIT: lerxst2112 beat me to it
