Python wrapper: update and improve CMakeLists

Tested and compatible with:

Ubuntu 20.04.6 LTS : Python 3.8.10;  CMake 3.16.3; Swig 4.0.1
Debian 11          : Python 3.9.2;   CMake 3.13.4; Swig 4.0.2
Ubuntu 22.04.3 LTS : Python 3.10.12; CMake 3.22.1; Swig 4.0.2
Ubuntu 23.10       : Python 3.11.6;  CMake 3.27.4; Swig 4.1.0
Alpine 3.18.4      : Python 3.11.6;  CMake 3.26.5; Swig 4.1.1

Signed-off-by: Mikael Bourhis <mikael.bourhis@smile.fr>

pyiec61850/CMakeLists.txt

@@ -1,6 +1,10 @@
 cmake_minimum_required(VERSION 3.12)
 
-set(CMAKE_POLICY_DEFAULT_CMP0078 NEW)
+cmake_policy(SET CMP0078 NEW)
+
+if (${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.14.0")
+    cmake_policy(SET CMP0086 NEW)
+endif()
 
 find_package(SWIG REQUIRED)
 include(${SWIG_USE_FILE})
@@ -12,6 +16,7 @@ include_directories(${CMAKE_CURRENT_SOURCE_DIR})
 
 set(CMAKE_SWIG_FLAGS "")
 set_property(SOURCE iec61850.i PROPERTY CPLUSPLUS ON)
+set_property(SOURCE iec61850.i PROPERTY SWIG_MODULE_NAME pyiec61850)
 
 if(WIN32)
     set(LIBS iec61850 ws2_32)
@@ -29,7 +34,7 @@ swig_link_libraries(pyiec61850 ${LIBS})
 # Finding python modules install path
 execute_process(
 	COMMAND ${Python_EXECUTABLE} -c
-	"from distutils.sysconfig import get_python_lib; import sys; sys.stdout.write(get_python_lib())"
+	"from sysconfig import get_path; import sys; sys.stdout.write(get_path('platlib'))"
 	OUTPUT_VARIABLE PYTHON_SITE_DIR
 )