From c20b6846f2ec4b1fe70d62fe99d165476aed65d0 Mon Sep 17 00:00:00 2001
From: Jude Taylor <me@jude.bio>
Date: Mon, 30 Nov 2015 12:54:04 -0800
Subject: [PATCH] rustc: build on darwin

---
 pkgs/development/compilers/llvm/3.7/llvm.nix |  6 ++++--
 pkgs/development/compilers/rustc/generic.nix | 13 ++++++++-----
 pkgs/top-level/all-packages.nix              |  6 +++++-
 3 files changed, 17 insertions(+), 8 deletions(-)

diff --git a/pkgs/development/compilers/llvm/3.7/llvm.nix b/pkgs/development/compilers/llvm/3.7/llvm.nix
index ff038024d10f..060c0f3e8676 100644
--- a/pkgs/development/compilers/llvm/3.7/llvm.nix
+++ b/pkgs/development/compilers/llvm/3.7/llvm.nix
@@ -14,6 +14,7 @@
 , compiler-rt_src
 , libcxxabi
 , debugVersion ? false
+, enableSharedLibraries ? !stdenv.isDarwin
 }:
 
 let
@@ -46,10 +47,11 @@ in stdenv.mkDerivation rec {
     "-DLLVM_BUILD_TESTS=ON"
     "-DLLVM_ENABLE_FFI=ON"
     "-DLLVM_ENABLE_RTTI=ON"
-  ] ++ stdenv.lib.optionals (!isDarwin) [
+  ] ++ stdenv.lib.optional enableSharedLibraries
     "-DBUILD_SHARED_LIBS=ON"
+    ++ stdenv.lib.optional (!isDarwin)
     "-DLLVM_BINUTILS_INCDIR=${binutils}/include"
-  ] ++ stdenv.lib.optionals ( isDarwin) [
+    ++ stdenv.lib.optionals ( isDarwin) [
     "-DLLVM_ENABLE_LIBCXX=ON"
     "-DCAN_TARGET_i386=false"
   ];
diff --git a/pkgs/development/compilers/rustc/generic.nix b/pkgs/development/compilers/rustc/generic.nix
index 9b3dca42b628..d578facad698 100644
--- a/pkgs/development/compilers/rustc/generic.nix
+++ b/pkgs/development/compilers/rustc/generic.nix
@@ -37,6 +37,8 @@ let version = if isRelease then
 
     name = "rustc-${version}";
 
+    llvmShared = llvmPackages_37.llvm.override { enableSharedLibraries = true; };
+
     platform = if stdenv.system == "i686-linux"
       then "linux-i386"
       else if stdenv.system == "x86_64-linux"
@@ -84,6 +86,8 @@ with stdenv.lib; stdenv.mkDerivation {
 
   __impureHostDeps = [ "/usr/lib/libedit.3.dylib" ];
 
+  NIX_LDFLAGS = stdenv.lib.optionalString stdenv.isDarwin "-rpath ${llvmShared}/lib";
+
   src = if isRelease then
       fetchzip {
         url = "http://static.rust-lang.org/dist/rustc-${version}-src.tar.gz";
@@ -119,7 +123,7 @@ with stdenv.lib; stdenv.mkDerivation {
                 # ++ [ "--jemalloc-root=${jemalloc}/lib"
                 ++ [ "--default-linker=${stdenv.cc}/bin/cc" "--default-ar=${stdenv.cc.binutils}/bin/ar" ]
                 ++ optional (stdenv.cc.cc ? isClang) "--enable-clang"
-                ++ optional (!forceBundledLLVM) "--llvm-root=${llvmPackages_37.llvm}";
+                ++ optional (!forceBundledLLVM) "--llvm-root=${llvmShared}";
 
   inherit patches;
 
@@ -155,11 +159,10 @@ with stdenv.lib; stdenv.mkDerivation {
     configureFlagsArray+=("--infodir=$out/share/info")
   '';
 
-  # Procps is needed for one of the test cases
-  nativeBuildInputs = [ file python2 ]
-    ++ optionals stdenv.isLinux [ procps ];
+  # ps is needed for one of the test cases
+  nativeBuildInputs = [ file python2 procps ];
   buildInputs = [ ncurses ]
-    ++ optional (!forceBundledLLVM) llvmPackages_37.llvm;
+    ++ optional (!forceBundledLLVM) llvmShared;
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 8164085003b3..6d14317e4038 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -4775,7 +4775,11 @@ let
   rtags = callPackage ../development/tools/rtags/default.nix {};
 
   rustcMaster = callPackage ../development/compilers/rustc/head.nix {};
-  rustc = callPackage ../development/compilers/rustc {};
+  rustc = callPackage ../development/compilers/rustc {
+    callPackage = newScope ({
+      procps = if stdenv.isDarwin then darwin.ps else procps;
+    });
+  };
 
   rustPlatform = rustStable;