From 053c8d85f0a8c3ffe7db82ca6d0ebdf8784d8c0b Mon Sep 17 00:00:00 2001
From: Ben Wolsieffer <benwolsieffer@gmail.com>
Date: Sun, 22 Nov 2020 21:32:10 -0500
Subject: [PATCH] pythonPackages.pykdl: fix build with latest SIP

Backport an upstream patch to fix the build. Only needed to build the Python
bindings, not orocos-kdl.
---
 pkgs/development/python-modules/pykdl/default.nix | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/python-modules/pykdl/default.nix b/pkgs/development/python-modules/pykdl/default.nix
index 5fc38cd5dd4..674a43f5f3e 100644
--- a/pkgs/development/python-modules/pykdl/default.nix
+++ b/pkgs/development/python-modules/pykdl/default.nix
@@ -1,9 +1,19 @@
-{ lib, stdenv, toPythonModule, cmake, orocos-kdl, python, sip }:
+{ lib, stdenv, toPythonModule, fetchpatch, cmake, orocos-kdl, python, sip }:
 
 toPythonModule (stdenv.mkDerivation {
   pname = "pykdl";
   inherit (orocos-kdl) version src;
 
+  patches = [
+    # Fix build with SIP 4.19.23+. Can be removed with version 1.5.
+    # https://github.com/orocos/orocos_kinematics_dynamics/pull/270
+    (fetchpatch {
+      url = "https://github.com/orocos/orocos_kinematics_dynamics/commit/d8d087ad0e1c41f3489d1a255ebfa27b5695196b.patch";
+      sha256 = "0qyskqxv4a982kidzzyh34xj2iiw791ipbbl29jg4qb4l21xwqlg";
+      stripLen = 1;
+    })
+  ];
+
   sourceRoot = "source/python_orocos_kdl";
 
   nativeBuildInputs = [ cmake ];