From d4ef316240086b54ac5c8c91207b07cae29ab30f Mon Sep 17 00:00:00 2001
From: Harry Mallon <hjmallon@gmail.com>
Date: Fri, 27 Oct 2023 18:53:02 +0100
Subject: [PATCH] Silence warnings when building with CMake 3.27 (#16)

* CMake policy CMP0114 (introduced CMake 3.19) warns if
  ExternalProject is used with Xcode generator and is
  required to use Xcode 'new build system'
* CMake policy CMP0135 (introduced CMake 3.24) warns if
  DOWNLOAD_EXTRACT_TIMESTAMP is not specified in
  ExternalProject.
---
 cmake/HunterGate.cmake | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/cmake/HunterGate.cmake b/cmake/HunterGate.cmake
index 76c98d9..7f2adef 100644
--- a/cmake/HunterGate.cmake
+++ b/cmake/HunterGate.cmake
@@ -254,6 +254,12 @@ function(hunter_gate_download dir)
       WRITE
       "${cmakelists}"
       "cmake_minimum_required(VERSION 3.5)\n"
+      "if(POLICY CMP0114)\n"
+      "  cmake_policy(SET CMP0114 NEW)\n"
+      "endif()\n"
+      "if(POLICY CMP0135)\n"
+      "  cmake_policy(SET CMP0135 NEW)\n"
+      "endif()\n"
       "project(HunterDownload LANGUAGES NONE)\n"
       "include(ExternalProject)\n"
       "ExternalProject_Add(\n"