From 4f4ab52f4fde7d831e3dad4cd91f1da30a3d0ae8 Mon Sep 17 00:00:00 2001
From: Rick van Schijndel <rol3517@gmail.com>
Date: Fri, 18 Jun 2021 00:10:40 +0200
Subject: [PATCH] freeimage: support cross-compilation

Co-authored-by: Doron Behar <doron.behar@gmail.com>
---
 pkgs/development/libraries/freeimage/default.nix | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/pkgs/development/libraries/freeimage/default.nix b/pkgs/development/libraries/freeimage/default.nix
index 236305a572bf..87997cead43f 100644
--- a/pkgs/development/libraries/freeimage/default.nix
+++ b/pkgs/development/libraries/freeimage/default.nix
@@ -18,6 +18,14 @@ stdenv.mkDerivation {
   prePatch = "rm -rf Source/Lib* Source/OpenEXR Source/ZLib";
   patches = [ ./unbundle.diff ];
 
+  postPatch = ''
+    # To support cross compilation, use the correct `pkg-config`.
+    substituteInPlace Makefile.fip \
+      --replace "pkg-config" "$PKG_CONFIG"
+    substituteInPlace Makefile.gnu \
+      --replace "pkg-config" "$PKG_CONFIG"
+  '';
+
   nativeBuildInputs = [
     pkg-config
   ] ++ lib.optionals stdenv.isDarwin [