EQEmu compile fail - inflateInit2_, defalteInit_

[scerion]

Greetings,
I'm trying to set up EQEmu on my linux server. It's an already exisiting webserver running the following:
CENTOS 6.3 x86_64
Cpanel 11

I've been following the various Linux guides, and adjustments for x64. I'm currently in the process of compiling the code, but it generates the following error:

./common/packet_functions.o: In function `InflatePacket(unsigned char const*, unsigned int, unsigned char*, unsigned int, bool)':
/home/eqemu/source/EQEmuServer/world/../common/packet_functions.cpp:245: undefined reference to `inflateInit2_'
/home/eqemu/source/EQEmuServer/world/../common/packet_functions.cpp:250: undefined reference to `inflate'
/home/eqemu/source/EQEmuServer/world/../common/packet_functions.cpp:253: undefined reference to `inflateEnd'
/home/eqemu/source/EQEmuServer/world/../common/packet_functions.cpp:272: undefined reference to `inflateEnd'
../common/packet_functions.o: In function `DeflatePacket(unsigned char const*, int, unsigned char*, int)':
/home/eqemu/source/EQEmuServer/world/../common/packet_functions.cpp:155: undefined reference to `deflateInit_'
/home/eqemu/source/EQEmuServer/world/../common/packet_functions.cpp:158: undefined reference to `deflate'
/home/eqemu/source/EQEmuServer/world/../common/packet_functions.cpp:162: undefined reference to `deflateEnd'
/home/eqemu/source/EQEmuServer/world/../common/packet_functions.cpp:167: undefined reference to `deflateEnd'
collect2: ld returned 1 exit status
make[1]: *** [zone] Error 1
make[1]: Leaving directory `/home/eqemu/source/EQEmuServer/zone'
make: *** [all] Error 2

any suggestions?