OpenLIBM is an effort to have a high quality independent LIBM library. It is meant to be used standalone in applications and programming language implementations, and perhaps even as a reference for LIBM implementations in OSes.

OpenLIBM builds on Linux and Mac OS X, and with little effort, should build on FreeBSD as well.

The OpenLIBM code derives from the FreeBSD msun implementation, which in turn derives from FDLIBM 5.3.