Better detection of Python site-dir

CMakeLists.txt

@@ -72,10 +72,15 @@ if (NOT DISABLE_PYTHON)
     if (NOT DEFINED PCILIB_PYTHON_SITEDIR)
 	execute_process (COMMAND ${PYTHON_EXECUTABLE} -c "import site; print (site.PREFIXES[-1])" OUTPUT_VARIABLE PYTHON_PREFIX OUTPUT_STRIP_TRAILING_WHITESPACE)
 	file (TO_CMAKE_PATH "${PYTHON_PREFIX}" PYTHON_PREFIX)
-	execute_process (COMMAND ${PYTHON_EXECUTABLE} -c "import site; print (site.getsitepackages()[0])" OUTPUT_VARIABLE PYTHON_SITE_DIR OUTPUT_STRIP_TRAILING_WHITESPACE)
+
+#	execute_process (COMMAND ${PYTHON_EXECUTABLE} -c "import site; print (site.getsitepackages()[0])" OUTPUT_VARIABLE PYTHON_SITE_DIR OUTPUT_STRIP_TRAILING_WHITESPACE)
+#	file (TO_CMAKE_PATH "${PYTHON_SITE_DIR}" PYTHON_SITE_DIR)
+#	string (REGEX REPLACE "^${PYTHON_PREFIX}/" "${CMAKE_INSTALL_PREFIX}/" PYTHON_SITE_DIR "${PYTHON_SITE_DIR}")
+
+	execute_process (COMMAND ${PYTHON_EXECUTABLE} -c "import site; list = [dir for dir in site.getsitepackages() if dir.startswith('${CMAKE_INSTALL_PREFIX}')]; liblist = [dir for dir in list if dir.startswith('${CMAKE_INSTALL_PREFIX}/lib')]; print liblist[0] if liblist else list[0] if list else site.getsitepackages()[0]" OUTPUT_VARIABLE PYTHON_SITE_DIR OUTPUT_STRIP_TRAILING_WHITESPACE)
+	message(${PYTHON_SITE_DIR})
 	file (TO_CMAKE_PATH "${PYTHON_SITE_DIR}" PYTHON_SITE_DIR)
 
-	string (REGEX REPLACE "^${PYTHON_PREFIX}/" "${CMAKE_INSTALL_PREFIX}/" PYTHON_SITE_DIR "${PYTHON_SITE_DIR}")
 	set(PCILIB_PYTHON_SITEDIR ${PYTHON_SITE_DIR} CACHE PATH "path to install python module")
     endif (NOT DEFINED PCILIB_PYTHON_SITEDIR)