Clean cmake files by using the routines in cmake/python.cmake

src/CMakeLists.txt

@@ -16,17 +16,8 @@
 #
 # Python
 #
-INCLUDE(FindPythonLibs)
-IF (NOT ${PYTHONLIBS_FOUND} STREQUAL TRUE)
-  MESSAGE(FATAL_ERROR "Python has not been found.")
-ELSE()
-  MESSAGE(STATUS "PYTHON_LIBRARY=${PYTHON_LIBRARY}")
-ENDIF (NOT ${PYTHONLIBS_FOUND} STREQUAL TRUE)
-
-INCLUDE(FindPythonInterp)
-IF (NOT ${PYTHONINTERP_FOUND} STREQUAL TRUE)
-   MESSAGE(FATAL_ERROR "Python executable has not been found.")
-ENDIF (NOT ${PYTHONINTERP_FOUND} STREQUAL TRUE)
+INCLUDE(../cmake/python.cmake)
+FINDPYTHON()
 
 INCLUDE_DIRECTORIES(${Boost_INCLUDE_DIRS})
 LINK_DIRECTORIES(${Boost_LIBRARY_DIRS})
@@ -95,12 +86,6 @@ INCLUDE_DIRECTORIES(${PYTHON_INCLUDE_PATH}
 # Installation
 #
 
-EXEC_PROGRAM(${PYTHON_EXECUTABLE} ARGS
-    "-c \"import sys, os; print os.sep.join(['lib', 'python' + sys.version[:3], 'site-packages'])\""
-    OUTPUT_VARIABLE PYTHON_SITELIB)
-
-MESSAGE(STATUS "PYTHON_SITELIB=${PYTHON_SITELIB}")
-
 SET(PYTHON_INSTALL_DIR ${CMAKE_INSTALL_PREFIX}/${PYTHON_SITELIB}/dynamic_graph)
 
 INSTALL(TARGETS ${PYTHON_MODULE}