From 6eaf7d318ec78189ad9c7be1f2fa952ba5918670 Mon Sep 17 00:00:00 2001
From: Jude Taylor <me@jude.bio>
Date: Tue, 27 Oct 2015 18:00:00 -0700
Subject: [PATCH] build libunwind for real

---
 .../libunwind/default.nix                     | 27 +++++++++++--------
 1 file changed, 16 insertions(+), 11 deletions(-)

diff --git a/pkgs/os-specific/darwin/apple-source-releases/libunwind/default.nix b/pkgs/os-specific/darwin/apple-source-releases/libunwind/default.nix
index 32c8d6717f0b..7177d8fb9e68 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/libunwind/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/libunwind/default.nix
@@ -1,24 +1,29 @@
-{ stdenv, appleDerivation, dyld }:
+{ stdenv, appleDerivation, dyld, osx_private_sdk }:
 
 appleDerivation {
   phases = [ "unpackPhase" "buildPhase" "installPhase" ];
 
   buildInputs = [ dyld ];
 
+  NIX_CFLAGS_COMPILE = "-I${osx_private_sdk}/PrivateSDK10.9.sparse.sdk/usr/include";
+
   buildPhase = ''
-    # cd src
-    # cc -I$PWD/../include -c libuwind.cxx
-    # cc -I$PWD/../include -c Registers.s
-    # cc -I$PWD/../include -c unw_getcontext.s
-    # cc -I$PWD/../include -c UnwindLevel1.c
-    # cc -I$PWD/../include -c UnwindLevel1-gcc-ext.c
-    # cc -I$PWD/../include -c Unwind-sjlj.c
+    pushd src
+    c++ -I../include -c libuwind.cxx -o libuwind.o
+    cc  -I../include -c Registers.s -o Registers.o
+    cc  -I../include -c unw_getcontext.s -o unw_getcontext.o
+    cc  -I../include -c UnwindLevel1.c -o UnwindLevel1.o
+    cc  -I../include -c UnwindLevel1-gcc-ext.c -o UnwindLevel1-gcc-ext.o
+    cc  -I../include -c Unwind-sjlj.c -o Unwind-sjlj.o
+    ld -arch x86_64 -dylib libuwind.o Registers.o unw_getcontext.o UnwindLevel1.o UnwindLevel1-gcc-ext.o Unwind-sjlj.o \
+      -lc++ -lc -install_name $out/lib/libunwind.dylib -o libunwind.dylib
+    popd
   '';
 
   installPhase = ''
-    mkdir -p $out
-
-    cp -r include $out
+    mkdir -p $out/lib
+    cp -R include $out/include
+    install -m 0755 src/libunwind.dylib $out/lib
   '';
 
   meta = with stdenv.lib; {