[Haskell-cafe] building hmatrix on OSX

[Erik Rantapaa]

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`.

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