From fff0191f481c49320d5c540ed8ae491a44b59c8e Mon Sep 17 00:00:00 2001
From: Thomas Tuegel <ttuegel@gmail.com>
Date: Thu, 4 Jun 2015 07:17:30 -0500
Subject: [PATCH] arpack: build with openblas

---
 .../libraries/science/math/arpack/default.nix       | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/pkgs/development/libraries/science/math/arpack/default.nix b/pkgs/development/libraries/science/math/arpack/default.nix
index 01bb3371f5e2..c896ecca4728 100644
--- a/pkgs/development/libraries/science/math/arpack/default.nix
+++ b/pkgs/development/libraries/science/math/arpack/default.nix
@@ -1,4 +1,6 @@
-{ stdenv, fetchurl, gfortran, atlasWithLapack }:
+{ stdenv, fetchurl, gfortran, openblas }:
+
+with stdenv.lib;
 
 let
   version = "3.2.0";
@@ -10,10 +12,15 @@ stdenv.mkDerivation {
     sha256 = "1fwch6vipms1ispzg2djvbzv5wag36f1dmmr3xs3mbp6imfyhvff";
   };
 
-  buildInputs = [ gfortran atlasWithLapack ];
+  buildInputs = [ gfortran openblas ];
 
   # Auto-detection fails because gfortran brings in BLAS by default
-  configureFlags="--with-blas=-latlas --with-lapack=-latlas";
+  configureFlags = [
+    "--with-blas=-lopenblas"
+    "--with-lapack=-lopenblas"
+  ];
+
+  FFLAGS = optional openblas.blas64 "-fdefault-integer-8";
 
   meta = {
     homepage = "http://forge.scilab.org/index.php/p/arpack-ng/";