From 71cf65cec5786c5ad756e5f3df915846a3f85bf5 Mon Sep 17 00:00:00 2001
From: Ben Wolsieffer <benwolsieffer@gmail.com>
Date: Wed, 26 May 2021 23:56:18 -0400
Subject: [PATCH] pcl: fix convex hull support

PCL requires a patch to be compatible with QHull 2020.2. The patch has been
accepted upstream, but this commit uses a version of the patch from Conda, which
has been backported to 1.11.
---
 pkgs/development/libraries/pcl/default.nix | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/pkgs/development/libraries/pcl/default.nix b/pkgs/development/libraries/pcl/default.nix
index b8cdff1f48c8..2b2763b5a05d 100644
--- a/pkgs/development/libraries/pcl/default.nix
+++ b/pkgs/development/libraries/pcl/default.nix
@@ -1,6 +1,7 @@
 { lib
 , stdenv
 , fetchFromGitHub
+, fetchpatch
 , wrapQtAppsHook
 , cmake
 , qhull
@@ -30,6 +31,15 @@ stdenv.mkDerivation rec {
     sha256 = "1cli2rxqsk6nxp36p5mgvvahjz8hm4fb68yi8cf9nw4ygbcvcwb1";
   };
 
+  patches = [
+    # Support newer QHull versions (2020.2)
+    # Backport of https://github.com/PointCloudLibrary/pcl/pull/4540
+    (fetchpatch {
+      url = "https://raw.githubusercontent.com/conda-forge/pcl-feedstock/0b1eff402994a3fb891b44659c261e7e85c8d915/recipe/4540.patch";
+      sha256 = "0hhvw6ajigzrarn95aicni73zd3sdgnb8rc3wgjrrg19xs84z138";
+    })
+  ];
+
   nativeBuildInputs = [ pkg-config cmake wrapQtAppsHook ];
   buildInputs = [
     qhull