diff --git a/vlsisapd/src/bookshelf/src/CMakeLists.txt b/vlsisapd/src/bookshelf/src/CMakeLists.txt
index 70bcccf8..bb66684d 100644
--- a/vlsisapd/src/bookshelf/src/CMakeLists.txt
+++ b/vlsisapd/src/bookshelf/src/CMakeLists.txt
@@ -1,34 +1,32 @@
 
-  # to work on sl5 64 bits : need to suppress boost_python in Boost_LIBRARIES
-          set(Boost_LIBRARIES "")
-  setup_boost(program_options filesystem regex)
 
    include_directories ( ${VLSISAPD_SOURCE_DIR}/src/bookshelf/src
                          ${Boost_INCLUDE_DIRS}
+                         ${PYTHON_INCLUDE_PATH}
                        )
 
-		   set ( includes       vlsisapd/bookshelf/Parser.h
+                   set ( includes       vlsisapd/bookshelf/Parser.h
                                         vlsisapd/bookshelf/Node.h
                                         vlsisapd/bookshelf/Pin.h
                                         vlsisapd/bookshelf/Net.h
                                         vlsisapd/bookshelf/Row.h
                                         vlsisapd/bookshelf/Circuit.h
                                         vlsisapd/bookshelf/Exception.h
-                       )	        
-		   set ( cpps           Parser.cpp
+                       )            
+                   set ( cpps           Parser.cpp
                                         Node.cpp
                                         Pin.cpp
                                         Net.cpp
                                         Row.cpp
                                         Circuit.cpp
                                         Exception.cpp
-                       )	        
+                       )            
                    set ( testcpps       BookshelfTkMain.cpp )
            add_library ( bookshelf      ${cpps} )
  target_link_libraries ( bookshelf      ${Boost_LIBRARIES} )
  set_target_properties ( bookshelf      PROPERTIES VERSION 1.0 SOVERSION 1 )
         add_executable ( bookshelf-tk   ${testcpps} )
- target_link_libraries ( bookshelf-tk   bookshelf ${Boost_LIBRARIES} )
+ target_link_libraries ( bookshelf-tk   bookshelf ${Boost_LIBRARIES} ${PYTHON_LIBRARIES})
 
                install ( TARGETS        bookshelf      DESTINATION lib${LIB_SUFFIX} )
                install ( TARGETS        bookshelf-tk   DESTINATION bin )
diff --git a/vlsisapd/src/configuration/src/CMakeLists.txt b/vlsisapd/src/configuration/src/CMakeLists.txt
index 021ead89..856f9bca 100644
--- a/vlsisapd/src/configuration/src/CMakeLists.txt
+++ b/vlsisapd/src/configuration/src/CMakeLists.txt
@@ -1,7 +1,4 @@
 
-  # to work on sl5 64 bits : need to suppress boost_python in Boost_LIBRARIES
-          set(Boost_LIBRARIES "")
-  setup_boost(program_options filesystem regex)
 
                include ( ${QT_USE_FILE} )
    include_directories ( ${VLSISAPD_SOURCE_DIR}/src/configuration/src
diff --git a/vlsisapd/src/dtr/src/vlsisapd/dtr/Rules.h b/vlsisapd/src/dtr/src/vlsisapd/dtr/Rules.h
index f8260e64..1356a327 100644
--- a/vlsisapd/src/dtr/src/vlsisapd/dtr/Rules.h
+++ b/vlsisapd/src/dtr/src/vlsisapd/dtr/Rules.h
@@ -27,6 +27,8 @@ class Rule {
     public:
     Rule(Name name, double value, Name ref, Name layer1, Name layer2)
         : _name(name), _type(Name("")), _value(value), _valueStr(to_string(value)), _ref(ref), _layer1(layer1), _layer2(layer2) {};
+
+    virtual ~Rule() {}
     
     // accessors
     inline Name   getName();
@@ -57,6 +59,8 @@ class ARule : public Rule {
     public:
     ARule(Name name, double value, Name ref, Name layer1, Name layer2)
         : Rule(name, value, ref, layer1, layer2) {};
+
+    virtual ~ARule() {}
 };
     
 inline Name   Rule::getName()   { return _name;   };