From 29572c28a39b6c1aec15fccf324cbb6d75228988 Mon Sep 17 00:00:00 2001
From: Anthony Cowley <acowley@gmail.com>
Date: Wed, 17 Aug 2016 07:43:57 -0400
Subject: [PATCH] llvm-3.8: build shared library on darwin (#17671)

- Enable the shared library build on darwin by default to match other
  platforms.

- Fix the dylib file's name in the store

- Symlink a versioned name as some tooling expects this.
---
 pkgs/development/compilers/llvm/3.8/llvm.nix | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/compilers/llvm/3.8/llvm.nix b/pkgs/development/compilers/llvm/3.8/llvm.nix
index fb8266480326..fc29d00a5245 100644
--- a/pkgs/development/compilers/llvm/3.8/llvm.nix
+++ b/pkgs/development/compilers/llvm/3.8/llvm.nix
@@ -14,7 +14,7 @@
 , compiler-rt_src
 , libcxxabi
 , debugVersion ? false
-, enableSharedLibraries ? !stdenv.isDarwin
+, enableSharedLibraries ? true
 }:
 
 let
@@ -69,6 +69,11 @@ in stdenv.mkDerivation rec {
     paxmark m bin/{lli,llvm-rtdyld}
   '';
 
+  postInstall = stdenv.lib.optionalString (stdenv.isDarwin && enableSharedLibraries) ''
+    install_name_tool -id $out/lib/libLLVM.dylib $out/lib/libLLVM.dylib
+    ln -s $out/lib/libLLVM.dylib $out/lib/libLLVM-${version}.dylib
+  '';
+
   enableParallelBuilding = true;
 
   passthru.src = src;