From 2e1fa4a9f5f8b43a8f569aec3cb35aaf07ea7fba Mon Sep 17 00:00:00 2001
From: Anthony Cowley <acowley@gmail.com>
Date: Sun, 21 Aug 2016 00:59:31 -0400
Subject: [PATCH] fftw: fix on darwin

doc generation involves running Fortran wrapper generation shell scripts
that hard code references to gcc which fails on darwin.
---
 pkgs/development/libraries/fftw/default.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/fftw/default.nix b/pkgs/development/libraries/fftw/default.nix
index 6b92848fd0f7..68d1e62244cb 100644
--- a/pkgs/development/libraries/fftw/default.nix
+++ b/pkgs/development/libraries/fftw/default.nix
@@ -35,7 +35,9 @@ stdenv.mkDerivation rec {
     # all x86_64 have sse2
     # however, not all float sizes fit
     ++ optional (stdenv.isx86_64 && (precision == "single" || precision == "double") )  "--enable-sse2"
-    ++ optional stdenv.cc.isGNU "--enable-openmp";
+    ++ optional stdenv.cc.isGNU "--enable-openmp"
+    # doc generation causes Fortran wrapper generation which hard-codes gcc
+    ++ optional (!stdenv.cc.isGNU) "--disable-doc";
 
   enableParallelBuilding = true;