From 71a9eb80e78698efcf4cdcdd10e66933d276c5bf Mon Sep 17 00:00:00 2001
From: Matthew Bauer <mjbauer95@gmail.com>
Date: Wed, 1 Apr 2020 22:17:58 -0400
Subject: [PATCH] waylandpp: fix cross compilation

- add libffi dependency
- provide wayland-scanner++ when cross compiling
---
 pkgs/development/libraries/waylandpp/default.nix | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/libraries/waylandpp/default.nix b/pkgs/development/libraries/waylandpp/default.nix
index 4fd94a29f9c..d2f41ede5c9 100644
--- a/pkgs/development/libraries/waylandpp/default.nix
+++ b/pkgs/development/libraries/waylandpp/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, cmake, pkgconfig, pugixml, wayland, libGL }:
+{ stdenv, fetchFromGitHub, cmake, pkgconfig, pugixml, wayland, libGL, libffi, buildPackages }:
 
 stdenv.mkDerivation rec {
   pname = "waylandpp";
@@ -11,8 +11,10 @@ stdenv.mkDerivation rec {
     sha256 = "16h57hzd688664qcyznzhjp3hxipdkzgv46x82yhkww24av8b55n";
   };
 
+  cmakeFlags = stdenv.lib.optional (stdenv.hostPlatform != stdenv.buildPlatform) "-DWAYLAND_SCANNERPP=${buildPackages.waylandpp}/bin/wayland-scanner++";
+
   nativeBuildInputs = [ cmake pkgconfig ];
-  buildInputs = [ pugixml wayland libGL ];
+  buildInputs = [ pugixml wayland libGL libffi ];
 
   meta = with stdenv.lib; {
     description = "Wayland C++ binding";