Make XDMF_WRAP_PYTHON_INSTALL_DIR externally setable.

Also add components to _Xdmf install rule.

libsrc/CMakeLists.txt

@@ -469,11 +469,13 @@ IF(XDMF_WRAP_PYTHON)
   ENDIF(WIN32 OR APPLE)
 
   # Get the install path for python modules
-  EXEC_PROGRAM("${PYTHON_EXECUTABLE}" "${Xdmf_SOURCE_DIR}/CMake/"
-    ARGS "setup_install_paths.py" "purelib" --prefix=""
-    OUTPUT_VARIABLE XDMF_WRAP_PYTHON_INSTALL_DIR)
+  if(NOT XDMF_WRAP_PYTHON_INSTALL_DIR)
+    EXEC_PROGRAM("${PYTHON_EXECUTABLE}" "${Xdmf_SOURCE_DIR}/CMake/"
+      ARGS "setup_install_paths.py" "purelib" --prefix=""
+      OUTPUT_VARIABLE XDMF_WRAP_PYTHON_INSTALL_DIR)
 
-  SET(XDMF_WRAP_PYTHON_INSTALL_DIR ${CMAKE_INSTALL_PREFIX}${XDMF_WRAP_PYTHON_INSTALL_DIR}/Xdmf)
+    SET(XDMF_WRAP_PYTHON_INSTALL_DIR ${XDMF_WRAP_PYTHON_INSTALL_DIR}/Xdmf)
+  endif()
 
   # Replace backslashes with forward slashes
   IF(WIN32)
@@ -591,10 +593,9 @@ IF(NOT XDMF_INSTALL_NO_LIBRARIES)
     LIBRARY DESTINATION ${XDMF_INSTALL_LIB_DIR_CM24} COMPONENT Runtime
     ARCHIVE DESTINATION ${XDMF_INSTALL_LIB_DIR_CM24} COMPONENT Development)
   IF(XDMF_WRAP_PYTHON)
-    INSTALL(
-        TARGETS _Xdmf
-        DESTINATION
-        ${XDMF_WRAP_PYTHON_INSTALL_DIR})
+    INSTALL(TARGETS _Xdmf
+        RUNTIME DESTINATION ${XDMF_WRAP_PYTHON_INSTALL_DIR} COMPONENT Runtime
+        LIBRARY DESTINATION ${XDMF_WRAP_PYTHON_INSTALL_DIR} COMPONENT Runtime)
   ENDIF(XDMF_WRAP_PYTHON)
 ENDIF(NOT XDMF_INSTALL_NO_LIBRARIES)