From fc0456bed1372ccff51fc6fd578e5d2a09d64534 Mon Sep 17 00:00:00 2001
From: Andrew Childs <lorne@cons.org.nz>
Date: Thu, 19 Nov 2020 16:57:29 +0900
Subject: [PATCH] cc-wrapper: set -arch on darwin

---
 pkgs/build-support/cc-wrapper/default.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pkgs/build-support/cc-wrapper/default.nix b/pkgs/build-support/cc-wrapper/default.nix
index c8af8789fccf..06e43b6ea5f1 100644
--- a/pkgs/build-support/cc-wrapper/default.nix
+++ b/pkgs/build-support/cc-wrapper/default.nix
@@ -481,6 +481,10 @@ stdenv.mkDerivation {
       substituteAll ${../wrapper-common/utils.bash} $out/nix-support/utils.bash
     ''
 
+    + optionalString stdenv.targetPlatform.isDarwin ''
+      echo "-arch ${targetPlatform.darwinArch}" >> $out/nix-support/cc-cflags
+    ''
+
     ##
     ## Extra custom steps
     ##