From b229e9fdfdb7925b808b498bd6ff6cc9b0d55a60 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20=C4=8Cun=C3=A1t?= <v@cunat.cz>
Date: Fri, 14 Feb 2020 18:31:53 +0100
Subject: [PATCH] libclc: enableParallelBuilding = true

Otherwise it takes quite some time.  Tested on a 32-threaded machine,
so there probably aren't common high-parallelism bugs.
---
 pkgs/development/libraries/libclc/default.nix | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pkgs/development/libraries/libclc/default.nix b/pkgs/development/libraries/libclc/default.nix
index 4cea2df7816b..9ddf1d4f1576 100644
--- a/pkgs/development/libraries/libclc/default.nix
+++ b/pkgs/development/libraries/libclc/default.nix
@@ -28,6 +28,8 @@ stdenv.mkDerivation {
     ${python.interpreter} ./configure.py --prefix=$out
   '';
 
+  enableParallelBuilding = true;
+
   meta = with stdenv.lib; {
     homepage = http://libclc.llvm.org/;
     description = "Implementation of the library requirements of the OpenCL C programming language";