Fix build warnings in CMake >= 3.24

Author: gasse

CMakeLists.txt

@@ -1,5 +1,14 @@
 cmake_minimum_required(VERSION 3.14)
-cmake_policy(SET CMP0095 OLD)  # RPATH escaping
+
+# RPATH escaping (only in old CMake versions)
+if (CMAKE_VERSION VERSION_LESS "3.24.0")
+	cmake_policy(SET CMP0095 OLD)
+endif()
+
+# Avoid warning about DOWNLOAD_EXTRACT_TIMESTAMP in CMake 3.24:
+if (CMAKE_VERSION VERSION_GREATER_EQUAL "3.24.0")
+	cmake_policy(SET CMP0135 NEW)
+endif()
 
 # Adapt compiler flags if using Conda compiler packages. Before project so they are not modified.
 include(cmake/Conda.cmake)