From 2990cd8aeac6b6a05121eebb0f5ca997eb73a650 Mon Sep 17 00:00:00 2001
From: Robert Helgesson <robert@rycee.net>
Date: Wed, 28 Dec 2016 12:19:09 +0100
Subject: [PATCH] clblas-cuda: use system gtest library

Without this the build attempts to download the library.
---
 .../development/libraries/science/math/clblas/cuda/default.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/development/libraries/science/math/clblas/cuda/default.nix b/pkgs/development/libraries/science/math/clblas/cuda/default.nix
index c142514b2625..6d3faa2fb7ff 100644
--- a/pkgs/development/libraries/science/math/clblas/cuda/default.nix
+++ b/pkgs/development/libraries/science/math/clblas/cuda/default.nix
@@ -7,6 +7,7 @@
 , python
 , cudatoolkit
 , nvidia_x11
+, gtest
 }:
 
 stdenv.mkDerivation rec {
@@ -40,6 +41,7 @@ stdenv.mkDerivation rec {
     cmake ../src -DCMAKE_INSTALL_PREFIX=$out \
                  -DCMAKE_BUILD_TYPE=Release \
                  -DOPENCL_ROOT=${cudatoolkit} \
+                 -DUSE_SYSTEM_GTEST=ON
   '';
 
   dontStrip = true; 
@@ -51,6 +53,7 @@ stdenv.mkDerivation rec {
     python
     cudatoolkit
     nvidia_x11
+    gtest
   ]; 
 
   meta = with stdenv.lib; {