From 75f636067eb94f46731b1edc4ab82417e027751c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ludovic=20Court=C3=A8s?= <ludo@gnu.org>
Date: Wed, 25 Apr 2012 14:21:41 +0000
Subject: [PATCH] GNU Emacs 23: Use Apple-GCC on Darwin.

svn path=/nixpkgs/trunk/; revision=33919
---
 pkgs/top-level/all-packages.nix | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 85148250df8..ea767ac4b9b 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -6569,6 +6569,13 @@ let
   };
 
   emacs23 = callPackage ../applications/editors/emacs-23 {
+    stdenv =
+      if stdenv.isDarwin
+      /* On Darwin, use Apple-GCC, otherwise:
+           configure: error: C preprocessor "cc -E -no-cpp-precomp" fails sanity check */
+      then overrideGCC stdenv gccApple
+      else stdenv;
+
     # use override to select the appropriate gui toolkit
     libXaw = if stdenv.isDarwin then xlibs.libXaw else null;
     Xaw3d = null;