cmake: silence FindPythonInterp warning

CMakeLists.txt

@@ -28,6 +28,9 @@
 #
 # Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
 
+cmake_minimum_required(VERSION 3.5)
+message(STATUS "CMake version ${CMAKE_VERSION}")
+
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
 list(INSERT CMAKE_MODULE_PATH 0
@@ -37,15 +40,14 @@ include(CheckCXXCompilerFlag)
 include(CheckLinkerFlag)
 include(CheckLibraryExists)
 include(CheckFunctionExists)
+
+cmake_policy(SET CMP0148 OLD)
 include(FindPythonInterp)
 
 if (IOS)
     INCLUDE(CmakeLists_IOS.txt)
 endif()
 
-cmake_minimum_required(VERSION 3.5)
-message(STATUS "CMake version ${CMAKE_VERSION}")
-
 project(monero)
 
 option (USE_CCACHE "Use ccache if a usable instance is found" ON)
@@ -219,7 +221,7 @@ function(forbid_undefined_symbols)
     file(MAKE_DIRECTORY "${TEST_PROJECT}")
     file(WRITE "${TEST_PROJECT}/CMakeLists.txt"
       [=[
-cmake_minimum_required(VERSION 3.1)
+cmake_minimum_required(VERSION 3.5)
 project(test)
 option(EXPECT_SUCCESS "" ON)
 file(WRITE "${CMAKE_SOURCE_DIR}/incorrect_source.cpp" "void undefined_symbol(); void symbol() { undefined_symbol(); }")