fix build for cmake < 3.9

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 00a3de2..1c313de 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -20,7 +20,9 @@ set(libsimgrid-java_version "${release_version}")
 # Basic checks on cmake
 cmake_minimum_required(VERSION 3.5)
 #for lto, to avoid warning (should be removed when switching to requiring cmake >= 3.9)
-cmake_policy(SET CMP0069 NEW)
+if(CMAKE_VERSION VERSION_MORE "3.9")
+  cmake_policy(SET CMP0069 NEW)
+endif()
 message(STATUS "Cmake version ${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION}.${CMAKE_PATCH_VERSION}")
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_HOME_DIRECTORY}/tools/cmake/Modules)