+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)
+ unset(PYTHON_EXECUTABLE CACHE)
+ unset(PYTHON_VERSION_MAJOR)
+ unset(PYTHON_VERSION_MINOR)
+ unset(PYTHON_VERSION_STRING)
+ find_package(PythonInterp 3.3 REQUIRED)
+endif()
+
+set(LYX_PYTHON_EXECUTABLE ${PYTHON_EXECUTABLE} CACHE FILEPATH "Python to be used by LyX")
+