From 0adae9f822e93b0a7507619426119173d2ec001d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20=C4=8Cun=C3=A1t?= <vcunat@gmail.com>
Date: Tue, 24 Sep 2013 23:06:49 +0200
Subject: [PATCH] llvm: add support for R600

It will be useful for mesa >= 9.2.*
Also, I want to restart the build on Hydra, as it succeeds for me.
---
 pkgs/development/compilers/llvm/default.nix | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/compilers/llvm/default.nix b/pkgs/development/compilers/llvm/default.nix
index 9337f965c96a..a7129f5cef3f 100644
--- a/pkgs/development/compilers/llvm/default.nix
+++ b/pkgs/development/compilers/llvm/default.nix
@@ -25,7 +25,8 @@ stdenv.mkDerivation rec {
     "-DCMAKE_BUILD_TYPE=Release"
     "-DLLVM_ENABLE_FFI=ON"
     "-DLLVM_BINUTILS_INCDIR=${binutils}/include"
-  ] ++ lib.optional (!isDarwin) [ "-DBUILD_SHARED_LIBS=ON" ];
+    "-DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD=R600" # for mesa
+  ] ++ lib.optional (!isDarwin) "-DBUILD_SHARED_LIBS=ON";
 
   enableParallelBuilding = true;