From d4f1fa709cd1ac66a0a1299803c5bd8c32758044 Mon Sep 17 00:00:00 2001
From: Dmitry Kalinkin <dmitry.kalinkin@gmail.com>
Date: Mon, 23 Dec 2019 17:55:13 -0500
Subject: [PATCH] pythonPackages.Theano: fix darwin build

This only formally fixes the name of the compiler. Theano appears to be
working on darwin after this.
---
 pkgs/development/python-modules/Theano/default.nix | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/python-modules/Theano/default.nix b/pkgs/development/python-modules/Theano/default.nix
index 554eaf97791..67600a6e5fd 100644
--- a/pkgs/development/python-modules/Theano/default.nix
+++ b/pkgs/development/python-modules/Theano/default.nix
@@ -35,7 +35,11 @@ let
     '';
 
   # Theano spews warnings and disabled flags if the compiler isn't named g++
-  cxx_compiler = wrapped "g++" "\\$HOME/.theano"
+  cxx_compiler_name =
+    if stdenv.cc.isGNU then "g++" else
+    if stdenv.cc.isClang then "clang++" else
+    throw "Unknown C++ compiler";
+  cxx_compiler = wrapped cxx_compiler_name "\\$HOME/.theano"
     (    stdenv.lib.optional cudaSupport libgpuarray_
       ++ stdenv.lib.optional cudnnSupport cudnn );