From 1004d44d80ebbfb3eab4deea3cd7c50f51c681e5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20=C4=8Cun=C3=A1t?= <vcunat@gmail.com>
Date: Sun, 4 Oct 2015 10:12:56 +0200
Subject: [PATCH] llvm-3.7: fix build by -lpthread

This is strange. Morover, 3.6 builds fine without modifications.
---
 pkgs/development/compilers/llvm/3.7/llvm.nix | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pkgs/development/compilers/llvm/3.7/llvm.nix b/pkgs/development/compilers/llvm/3.7/llvm.nix
index 4ff61b27878..361ae4ba117 100644
--- a/pkgs/development/compilers/llvm/3.7/llvm.nix
+++ b/pkgs/development/compilers/llvm/3.7/llvm.nix
@@ -51,6 +51,8 @@ in stdenv.mkDerivation rec {
     "-DCAN_TARGET_i386=false"
   ];
 
+  NIX_LDFLAGS = "-lpthread"; # no idea what's the problem
+
   postBuild = ''
     rm -fR $out