diff -ru silo-4.9.1-old/configure silo-4.9.1-new/configure
--- silo-4.9.1-old/configure	2014-01-18 23:19:15.755030306 +0100
+++ silo-4.9.1-new/configure	2014-01-18 23:20:52.595031159 +0100
@@ -27503,7 +27503,7 @@
         ax_qt_lib="`ls $ax_qt_lib_dir/libQt* | sed -n 1p |
                      sed s@$ax_qt_lib_dir/lib@@ | sed s@[.].*@@`"
       fi
-      ax_qt_LIBS="-L$ax_qt_lib_dir -l$ax_qt_lib $X_PRE_LIBS $X_LIBS -lX11 -lXext -lXmu -lXt -lXi $X_EXTRA_LIBS"
+      ax_qt_LIBS="-L$ax_qt_lib_dir -l$ax_qt_lib $X_PRE_LIBS $X_LIBS -lQtCore -lQtGui -lX11 -lXext -lXmu -lXt -lXi $X_EXTRA_LIBS"
     else
       # Use cached value or do search, starting with suggestions from
       # the command line
@@ -27577,7 +27577,7 @@
       ax_qt_lib="`ls $ax_qt_lib_dir/libQt* | sed -n 1p |
                    sed s@$ax_qt_lib_dir/lib@@ | sed s@[.].*@@`"
     fi
-    ax_qt_LIBS="-L$ax_qt_lib_dir -l$ax_qt_lib $X_PRE_LIBS $X_LIBS -lX11 -lXext -lXmu -lXt -lXi $X_EXTRA_LIBS"
+    ax_qt_LIBS="-L$ax_qt_lib_dir -l$ax_qt_lib $X_PRE_LIBS $X_LIBS -lQtCore -lQtGui -lX11 -lXext -lXmu -lXt -lXi $X_EXTRA_LIBS"
   else
     # There is no valid definition for $QTDIR as Trolltech likes to see it
     ax_qt_dir=
@@ -27589,7 +27589,7 @@
         ax_qt_lib="`ls $ax_qt_lib_dir/libQt* | sed -n 1p |
                      sed s@$ax_qt_lib_dir/lib@@ | sed s@[.].*@@`"
       fi
-      ax_qt_LIBS="-L$ax_qt_lib_dir -l$ax_qt_lib $X_PRE_LIBS $X_LIBS -lX11 -lXext -lXmu -lXt -lXi $X_EXTRA_LIBS"
+      ax_qt_LIBS="-L$ax_qt_lib_dir -l$ax_qt_lib $X_PRE_LIBS $X_LIBS -lQtCore -lQtGui -lX11 -lXext -lXmu -lXt -lXi $X_EXTRA_LIBS"
     else
       # Normally, when there is no traditional Trolltech installation,
       # the library is installed in a place where the linker finds it
@@ -27607,7 +27607,7 @@
       # See if we find the library without any special options.
       # Don't add top $LIBS permanently yet
       ax_save_LIBS="$LIBS"
-      LIBS="-l$ax_qt_lib $X_PRE_LIBS $X_LIBS -lX11 -lXext -lXmu -lXt -lXi $X_EXTRA_LIBS"
+      LIBS="-l$ax_qt_lib $X_PRE_LIBS $X_LIBS -lQtCore -lQtGui -lX11 -lXext -lXmu -lXt -lXi $X_EXTRA_LIBS"
       ax_qt_LIBS="$LIBS"
       ax_save_CXXFLAGS="$CXXFLAGS"
       CXXFLAGS="-I$ax_qt_include_dir -I$ax_qt_include_dir/Qt -I$ax_qt_include_dir/QtCore -I$ax_qt_include_dir/QtGui"
@@ -27668,7 +27668,7 @@
         # That did not work. Try the multi-threaded version
         echo "Non-critical error, please neglect the above." >&5
         ax_qt_lib=qt-mt
-        LIBS="-l$ax_qt_lib $X_PRE_LIBS $X_LIBS -lX11 -lXext -lXmu -lXt -lXi $X_EXTRA_LIBS"
+        LIBS="-l$ax_qt_lib $X_PRE_LIBS $X_LIBS -lQtCore -lQtGui -lX11 -lXext -lXmu -lXt -lXi $X_EXTRA_LIBS"
         cat >conftest.$ac_ext <<_ACEOF
 /* confdefs.h.  */
 _ACEOF
@@ -27726,7 +27726,7 @@
           # That did not work. Try the OpenGL version
           echo "Non-critical error, please neglect the above." >&5
           ax_qt_lib=qt-gl
-          LIBS="-l$ax_qt_lib $X_PRE_LIBS $X_LIBS -lX11 -lXext -lXmu -lXt -lXi $X_EXTRA_LIBS"
+          LIBS="-l$ax_qt_lib $X_PRE_LIBS $X_LIBS -lQtCore -lQtGui -lX11 -lXext -lXmu -lXt -lXi $X_EXTRA_LIBS"
           cat >conftest.$ac_ext <<_ACEOF
 /* confdefs.h.  */
 _ACEOF
@@ -27809,7 +27809,7 @@
               fi
             done
             # Try with that one
-            LIBS="-l$ax_qt_lib $X_PRE_LIBS $X_LIBS -lX11 -lXext -lXmu -lXt -lXi $X_EXTRA_LIBS"
+            LIBS="-l$ax_qt_lib $X_PRE_LIBS $X_LIBS -lQtCore -lQtGui -lX11 -lXext -lXmu -lXt -lXi $X_EXTRA_LIBS"
             cat >conftest.$ac_ext <<_ACEOF
 /* confdefs.h.  */
 _ACEOF