-find_package(PythonInterp 2.7 QUIET)
-if(PYTHONINTERP_FOUND)
- if(PYTHON_VERSION_STRING VERSION_GREATER 2.8)
- unset(PYTHONINTERP_FOUND)
- endif()
-endif()
+ if(NOT PYTHONINTERP_FOUND AND NOT GNUWIN32_DIR)
+ unset(PYTHON_EXECUTABLE CACHE)
+ unset(PYTHON_VERSION_MAJOR)
+ unset(PYTHON_VERSION_MINOR)
+ unset(PYTHON_VERSION_STRING)
+ find_package(PythonInterp 3.3 REQUIRED)
+ endif()