From dbc9f3b10df818b6277c8343cf6099e28ff1c563 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20=C4=8Cun=C3=A1t?= <vcunat@gmail.com>
Date: Sun, 20 Aug 2017 10:40:51 +0200
Subject: [PATCH] fftw: fix on Darwin (hopefully)

It won't produce the $info output.
---
 pkgs/development/libraries/fftw/default.nix | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/pkgs/development/libraries/fftw/default.nix b/pkgs/development/libraries/fftw/default.nix
index d4d8c7f8aee..5cf83752aa7 100644
--- a/pkgs/development/libraries/fftw/default.nix
+++ b/pkgs/development/libraries/fftw/default.nix
@@ -4,7 +4,10 @@ with lib;
 
 assert elem precision [ "single" "double" "long-double" "quad-precision" ];
 
-let version = "3.3.6-pl1"; in
+let
+  version = "3.3.6-pl1";
+  withDoc = stdenv.cc.isGNU;
+in
 
 stdenv.mkDerivation rec {
   name = "fftw-${precision}-${version}";
@@ -14,7 +17,8 @@ stdenv.mkDerivation rec {
     sha256 = "0g8qk98lgq770ixdf7n36yd5xjsgm2v3wzvnphwmhy6r4y2amx0y";
   };
 
-  outputs = [ "out" "dev" "man" "info" ]; # it's dev-doc only
+  outputs = [ "out" "dev" "man" ]
+    ++ optional withDoc "info"; # it's dev-doc only
   outputBin = "dev"; # fftw-wisdom
 
   configureFlags =
@@ -27,7 +31,7 @@ stdenv.mkDerivation rec {
     ++ optional (stdenv.isx86_64 && (precision == "single" || precision == "double") )  "--enable-sse2"
     ++ optional stdenv.cc.isGNU "--enable-openmp"
     # doc generation causes Fortran wrapper generation which hard-codes gcc
-    ++ optional (!stdenv.cc.isGNU) "--disable-doc";
+    ++ optional (!withDoc) "--disable-doc";
 
   enableParallelBuilding = true;