From 9ea503fa55763f52b5a750fd440e270fb41326c1 Mon Sep 17 00:00:00 2001
From: Robert Vollmert <rob@vllmrt.net>
Date: Mon, 19 Jun 2017 13:24:46 +0200
Subject: [PATCH] python-modules/protobuf: fix darwin build by passing C++
 includes explicitly

Fixes #26531.

Copies the matplotlib solution, as mentioned by @knedlsepp.
---
 pkgs/development/python-modules/protobuf.nix | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/python-modules/protobuf.nix b/pkgs/development/python-modules/protobuf.nix
index f2f0f5025d1..44b9ed70a18 100644
--- a/pkgs/development/python-modules/protobuf.nix
+++ b/pkgs/development/python-modules/protobuf.nix
@@ -1,5 +1,5 @@
 { stdenv, python, buildPythonPackage
-, protobuf, google_apputils, pyext
+, protobuf, google_apputils, pyext, libcxx
 , disabled, doCheck ? true }:
 
 with stdenv.lib;
@@ -8,6 +8,9 @@ buildPythonPackage rec {
   inherit (protobuf) name src;
   inherit disabled doCheck;
 
+  # work around python distutils compiling C++ with $CC
+  NIX_CFLAGS_COMPILE = stdenv.lib.optionalString stdenv.isDarwin "-I${libcxx}/include/c++/v1";
+
   propagatedBuildInputs = [ protobuf google_apputils ];
   buildInputs = [ google_apputils pyext ];