From ac88515052316802b09fd0956aa4ef0b8a63b823 Mon Sep 17 00:00:00 2001
From: Daiderd Jordan <daiderd@gmail.com>
Date: Mon, 11 Sep 2017 20:35:36 +0200
Subject: [PATCH] clang-stdenv: move libstdcxxHook to cc-wrapper

---
 pkgs/development/compilers/llvm/4/default.nix | 24 +++++++++++++------
 pkgs/top-level/all-packages.nix               |  6 ++---
 2 files changed, 20 insertions(+), 10 deletions(-)

diff --git a/pkgs/development/compilers/llvm/4/default.nix b/pkgs/development/compilers/llvm/4/default.nix
index 11a9a46c15e5..c1d1ce055d76 100644
--- a/pkgs/development/compilers/llvm/4/default.nix
+++ b/pkgs/development/compilers/llvm/4/default.nix
@@ -37,14 +37,17 @@ let
     llvm-manpages = lowPrio self.llvm.man;
     clang-manpages = lowPrio self.clang-unwrapped.man;
 
-    clang = wrapCC self.clang-unwrapped;
+    clang = if stdenv.cc.isGNU then self.libstdcxxClang else self.libcxxClang;
 
-    openmp = callPackage ./openmp.nix {};
+    libstdcxxClang = ccWrapperFun {
+      cc = self.clang-unwrapped;
+      /* FIXME is this right? */
+      inherit (stdenv.cc) libc nativeTools nativeLibc;
+      extraPackages = [ libstdcxxHook ];
+    };
 
     libcxxClang = ccWrapperFun {
       cc = self.clang-unwrapped;
-      isClang = true;
-      inherit (self) stdenv;
       /* FIXME is this right? */
       inherit (stdenv.cc) libc nativeTools nativeLibc;
       extraPackages = [ self.libcxx self.libcxxabi ];
@@ -53,11 +56,16 @@ let
     stdenv = stdenv.override (drv: {
       allowedRequisites = null;
       cc = self.clang;
-      # Use the gcc libstdc++ when targeting linux.
-      extraBuildInputs = if stdenv.cc.isGNU then [ libstdcxxHook ] else drv.extraBuildInputs;
+      # Don't include the libc++ and libc++abi from the original stdenv.
+      extraBuildInputs = stdenv.lib.optional stdenv.isDarwin darwin.CF;
     });
 
-    libcxxStdenv = overrideCC stdenv self.libcxxClang;
+    libcxxStdenv = stdenv.override (drv: {
+      allowedRequisites = null;
+      cc = self.libcxxClang;
+      # Don't include the libc++ and libc++abi from the original stdenv.
+      extraBuildInputs = stdenv.lib.optional stdenv.isDarwin darwin.CF;
+    });
 
     lld = callPackage ./lld.nix {};
 
@@ -66,6 +74,8 @@ let
     libcxx = callPackage ./libc++ {};
 
     libcxxabi = callPackage ./libc++abi.nix {};
+
+    openmp = callPackage ./openmp.nix {};
   };
 
 in self
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 6f449057a786..48336e75a38c 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -5308,7 +5308,7 @@ with pkgs;
   #Use this instead of stdenv to build with clang
   clangStdenv = if stdenv.isDarwin then stdenv else lowPrio llvmPackages.stdenv;
   clang-sierraHack-stdenv = overrideCC stdenv clang-sierraHack;
-  libcxxStdenv = lowPrio llvmPackages.libcxxStdenv;
+  libcxxStdenv = if stdenv.isDarwin then stdenv else lowPrio llvmPackages.libcxxStdenv;
 
   clean = callPackage ../development/compilers/clean { };
 
@@ -19410,8 +19410,8 @@ with pkgs;
   # `recurseIntoAttrs` for sake of hydra, not nix-env
   tests = recurseIntoAttrs {
     cc-wrapper = callPackage ../test/cc-wrapper { };
-    cc-wrapper-clang = callPackage ../test/cc-wrapper { stdenv = clangStdenv; };
-    cc-wrapper-libcxx = callPackage ../test/cc-wrapper { stdenv = libcxxStdenv; };
+    cc-wrapper-clang = callPackage ../test/cc-wrapper { stdenv = llvmPackages.stdenv; };
+    cc-wrapper-libcxx = callPackage ../test/cc-wrapper { stdenv = llvmPackages.libcxxStdenv; };
     stdenv-inputs = callPackage ../test/stdenv-inputs { };
 
     macOSSierraShared = callPackage ../test/macos-sierra-shared {};