[Haskell-cafe] building hmatrix on OSX

I'm trying to build hmatrix-0.16.1.1 on OSX 10.10.1, and I'm running into some undefined C functions and types in src/C/vector-aux.c: - struct random_data - random_r() - initstate_r() A specific error: src/C/vector-aux.c:738:24: error: variable has incomplete type 'struct random_data' struct random_data buffer; On a Linux system they seem to be defined in stdlib.h, but that doesn't seem to be the case on OSX. Is there a way to work around this? FWIW, I'm using GHC for OSX (https://ghcformacosx.github.io/) and I've installed `gsl` via `brew install gsl`.