From 59bdbbfa1700896e892a4e00b0652f014e5261c6 Mon Sep 17 00:00:00 2001
From: Robert Scott <code@humanleg.org.uk>
Date: Sat, 13 Nov 2021 00:32:48 +0000
Subject: [PATCH] ogre1_10: fix for aarch64

---
 pkgs/development/libraries/ogre/1.10.x.nix | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/pkgs/development/libraries/ogre/1.10.x.nix b/pkgs/development/libraries/ogre/1.10.x.nix
index 849db216b921..616792787818 100644
--- a/pkgs/development/libraries/ogre/1.10.x.nix
+++ b/pkgs/development/libraries/ogre/1.10.x.nix
@@ -16,6 +16,14 @@ stdenv.mkDerivation {
      sha256 = "1zwvlx5dz9nwjazhnrhzb0w8ilpa84r0hrxrmmy69pgr1p1yif5a";
   };
 
+  # fix for ARM. sys/sysctl.h has moved in later glibcs, and
+  # https://github.com/OGRECave/ogre-next/issues/132 suggests it isn't
+  # needed anyway.
+  postPatch = ''
+    substituteInPlace OgreMain/src/OgrePlatformInformation.cpp \
+      --replace '#include <sys/sysctl.h>' ""
+  '';
+
   cmakeFlags = [ "-DOGRE_BUILD_SAMPLES=${toString withSamples}" ]
     ++ map (x: "-DOGRE_BUILD_PLUGIN_${x}=on")
            ([ "BSP" "OCTREE" "PCZ" "PFX" ] ++ lib.optional withNvidiaCg "CG")