The package provides BLAS and LAPACK using Apple’s Accelerate framework. The framework is shipped with Mac OS X, and the package only links to it (without any additional compilation). Note that any other functions exported by the framework are implicitly made available by the package.
Where are all the FFI definitions?
Your contribution is highly appreciated. Do not hesitate to open an issue or a pull request. Note that any contribution submitted for inclusion in the project will be licensed according to the terms given in LICENSE.md.