From ef8a3d9f83bd8eb9e0815279dadac8b72661ed04 Mon Sep 17 00:00:00 2001
From: Ryan Burns <rtburns@protonmail.com>
Date: Tue, 2 Feb 2021 20:45:15 -0800
Subject: [PATCH] llvmPackages_11.compiler-rt: fix build on darwin

Needed to prevent faulty i686 codegen on x86_64. We're doing this
already for the older llvm packages, so not sure why 11 never had this.
---
 pkgs/development/compilers/llvm/11/compiler-rt.nix | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pkgs/development/compilers/llvm/11/compiler-rt.nix b/pkgs/development/compilers/llvm/11/compiler-rt.nix
index 091f327550b8..b3e8cb9e8288 100644
--- a/pkgs/development/compilers/llvm/11/compiler-rt.nix
+++ b/pkgs/development/compilers/llvm/11/compiler-rt.nix
@@ -26,6 +26,7 @@ stdenv.mkDerivation rec {
     "-DCMAKE_ASM_COMPILER_TARGET=${stdenv.hostPlatform.config}"
   ] ++ lib.optionals (stdenv.isDarwin) [
     "-DDARWIN_macosx_OVERRIDE_SDK_VERSION=ON"
+    "-DDARWIN_osx_ARCHS=${stdenv.hostPlatform.parsed.cpu.name}"
   ] ++ lib.optionals (useLLVM || bareMetal || isMusl) [
     "-DCOMPILER_RT_BUILD_SANITIZERS=OFF"
     "-DCOMPILER_RT_BUILD_XRAY=OFF"