On windows, ensure python module are located in "Lib" folder.

This is required by the code associated to the 'get_python_lib' function
in Lib/distutils/sysconfig.py

Considering that the function 'get_python_lib' is used when building
external package like Numpy, it is particularly important to be compliant
with the file organization imposed by the implementation of the 'get_python_lib'
function.

CMakeLists.txt

@@ -105,12 +105,18 @@ if(NOT BUILD_SHARED AND NOT BUILD_STATIC)
 endif(NOT BUILD_SHARED AND NOT BUILD_STATIC)
 
 # Set PYTHONHOME
-set(LIBDIR "lib")
+set(LIBDIR "Lib") # See Lib/distutils/sysconfig.py - function 'get_python_lib'
+if(UNIX)
+    set(LIBDIR "lib")
+endif()
 if(USE_LIB64)
     set_property(GLOBAL PROPERTY FIND_LIBRARY_USE_LIB64_PATHS ON)
     set(LIBDIR "lib64")
 endif()
-set(PYTHONHOME "${LIBDIR}/${LIBPYTHON}")
+set(PYTHONHOME "${LIBDIR}")
+if(UNIX)
+    set(PYTHONHOME "${PYTHONHOME}/${LIBPYTHON}")
+endif()
 
 # Install tree directory
 set(BIN_INSTALL_DIR bin)                         # Contains the python executable