This is a minimalistic, quick 'n dirty wrapper for liblzo2 - I didn't find another and was in a hurry and am by no means proud of my creation.
Currently, only lzo_init() and lzo1x_999_compress() are interfaced. But you could easily add other _compress/_uncompress functions given the example.
The software is free software, licensed under a GPLv2 license. See the COPYING file for the terms.