I thought I would broaden out the discussion Henning and I have been having.
I have managed to get http://hackage.haskell.org/package/blas-ffi <http://hackage.haskell.org/package/blas-ffi> to build under nix. Ideally we would like cabal2nix to do this automatically for us. We can do this if
We use openblas rather than blas.
Replace `PkgConfig-Depends: blas` with `PkgConfig-Depends: lapack (as the lapack derivation in nix generates a blas.pc) in the cabal file.
Fix nix to generate .pc files for blas - I don’t know the consequences of doing this but I can’t see any downside.
Does anyone have any views on what might be the best approach?
Dominic Steinitz
dominic(a)steinitz.org
http://idontgetoutmuch.org
Twitter: @idontgetoutmuch
> Begin forwarded message:
>
> From: dominic(a)steinitz.org
> Subject: Getting blas-ffi to build under nix
> Date: 28 August 2019 at 13:31:45 BST
> To: Henning Thielemann <lemming(a)henning-thielemann.de>
>
> Hi Henning,
>
> I think there are 3 options (in nix - they may not work elsewhere)
>
> Use openblas rather than blas
> Replace `PkgConfig-Depends: blas` with `PkgConfig-Depends: lapack`
> Fix nix to generate .pc files for blas (it does this for openblas and lapack, the latter also generates a blas.pc file
>
> I don’t have a strong preference but I think I’d go for using openblas. I can send a patch but of course it’s a 1 line change so maybe you could just do it yourself and release a new version to hackage?
>
> Dominic Steinitz
> dominic(a)steinitz.org <mailto:dominic@steinitz.org>
> http://idontgetoutmuch.org <http://idontgetoutmuch.org/>
> Twitter: @idontgetoutmuch
>
>
>
>
