diff -urN opencascade-6.8.0.orig/adm/lin/amk/Makefile.am opencascade-6.8.0/adm/lin/amk/Makefile.am
--- opencascade-6.8.0.orig/adm/lin/amk/Makefile.am	2014-11-07 16:27:48.000000000 +0100
+++ opencascade-6.8.0/adm/lin/amk/Makefile.am	2014-11-07 16:27:26.000000000 +0100
@@ -24,7 +24,10 @@
   ModelingAlgorithms_DIRS = 
 endif
 
-Visualization_PKGS = TKService TKV3d TKOpenGl TKMeshVS TKNIS TKVoxel TKIVtk
+Visualization_PKGS = TKService TKV3d TKOpenGl TKMeshVS TKNIS TKVoxel
+if HAVE_VTK
+ Visualization_PKGS += TKIVtk
+endif
 
 if ENABLE_VIS
   Visualization_DIRS = $(Visualization_PKGS)
@@ -48,7 +51,10 @@
   DataExchange_DIRS = 
 endif
 
-Draw_PKGS = TKDraw TKTopTest TKIVtkDraw TKViewerTest TKXSDRAW TKDCAF TKXDEDRAW TKTObjDRAW TKQADraw DRAWEXE
+Draw_PKGS = TKDraw TKTopTest TKViewerTest TKXSDRAW TKDCAF TKXDEDRAW TKTObjDRAW TKQADraw DRAWEXE
+if HAVE_VTK
+  Draw_PKGS += TKIVtkDraw 
+endif
 
 if ENABLE_DRAW
   Draw_DIRS = $(Draw_PKGS)
diff -urN opencascade-6.8.0.orig/configure.ac opencascade-6.8.0/configure.ac
--- opencascade-6.8.0.orig/configure.ac	2014-11-10 14:18:45.000000000 +0100
+++ opencascade-6.8.0/configure.ac	2014-11-10 13:56:26.000000000 +0100
@@ -779,20 +779,24 @@
 
 if test "xno$vtk_inc" = "xno"; then
   # user specified --without-vtk-lib
-  HAVE_VTK=no
   HAVE_VTK_INC=no
-  DISABLE_VTK_REASON_INC="(--with-vtk-include=DIR option was not defined)"
+  DISABLE_VTK_REASON="(--with-vtk-include=DIR option was not defined)"
 else
   CSF_VTK_INCLUDES=""
   AC_LANG([C++])
   HAVE_VTK_INC=yes
   if test ! -d $vtk_inc; then
-    DISABLE_VTK_REASON_INC="($vtk_inc directory does not exists)"
+    DISABLE_VTK_REASON="($vtk_inc directory does not exists)"
     AC_MSG_ERROR([$vtk_inc directory does not exists])
+  elif test ! -f $vtk_inc/vtkVersion.h; then
+    DISABLE_VTK_REASON="(vtk headers are not found in $vtk_inc)"
+    AC_MSG_ERROR([vtk headers are not found in $vtk_inc])
   elif test "x$vtk_inc" != "x"; then
      CPPFLAGS="-I$vtk_inc $CPPFLAGS";
   else
-     AC_MSG_NOTICE("--with-vtk-include key is not defined")
+     HAVE_VTK_INC=no
+     DISABLE_VTK_REASON="(--with-vtk-include=DIR option was not defined)"
+     AC_MSG_NOTICE("--with-vtk-include=DIR option was not defined")
   fi
 fi
 
@@ -1017,7 +1021,9 @@
 if test "xno" = "xno$vtk_lib"; then
 # user specified --without-vtk
   HAVE_VTK=no
-  DISABLE_VTK_REASON_LIB="(--with-vtk-library=DIR option was not defined)"
+  if test "x$DISABLE_VTK_REASON" = "x" ; then
+    DISABLE_VTK_REASON="(--with-vtk-library=DIR option was not defined)"
+  fi
 else
   CSF_VTK_LIB=""
   HAVE_VTK=yes
@@ -1025,39 +1031,25 @@
   #CPP_FLAGS="-I$vtk $CPPFLAGS"
   #AC_CHECK_HEADER( [Vtk/vtkConfigure.h], [HAVE_VTK_INC=yes], [HAVE_VTK_INC=no] )
   if test "x$HAVE_VTK_INC" = "xyes"; then
-    if test ! -d $vtk; then
-      DISABLE_VTK_REASON_LIB="($vtk_lib directory does not exist)"
+    if test ! -d $vtk_lib; then
+      DISABLE_VTK_REASON="($vtk_lib directory does not exist)"
       AC_MSG_ERROR([$vtk_lib directory does not exist])
-    elif test "x$vtk_lib" != "x"; then
-      LDFLAGS="-L$vtk_lib $LDFLAGS"
-    fi
-  else
-    HAVE_VTK=no
-  fi
-  
-  if test "x$HAVE_VTK" = "xyes"; then
-    if test "x$vtk_inc" != "x"; then
-      CSF_VTK_INCLUDES=""
-      CSF_OPT_INCLUDES="${CSF_OPT_INCLUDES} -I$vtk_inc -DHAVE_VTK"
-    else
-      HAVE_VTK=no
-    fi
-    if test "x$vtk_lib" != "x"; then
+    elif test ! -f $vtk_lib/libvtkCommonCore-6.1.so; then
+      DISABLE_VTK_REASON="(vtk libraries are not found in $vtk_lib)"
+      AC_MSG_ERROR([vtk libraries are not found in $vtk_lib])
+    elif test "x$vtk_lib" != "x" -a "x$vtk_inc" != "x"; then
       CSF_VTK_LIB="-L$vtk_lib -lvtkCommonCore-6.1 -lvtkCommonDataModel-6.1 -lvtkCommonExecutionModel-6.1 -lvtkCommonMath-6.1 -lvtkCommonTransforms-6.1 "
       CSF_VTK_LIB="${CSF_VTK_LIB} -lvtkRenderingCore-6.1 -lvtkRenderingOpenGL-6.1  -lvtkFiltersGeneral-6.1 -lvtkIOCore-6.1 -lvtkIOImage-6.1 -lvtkImagingCore-6.1 -lvtkInteractionStyle-6.1 "
-    else
-      HAVE_VTK=no
-    fi
-
-    if test "x$HAVE_VTK" = "xyes"; then
       CSF_OPT_INC="$vtk_inc:${CSF_OPT_INC}"
       CSF_OPT_LIB="$vtk_lib:${CSF_OPT_LIB}"
+      CSF_OPT_INCLUDES="${CSF_OPT_INCLUDES} -I$vtk_inc -DHAVE_VTK"
     else
-      DISABLE_VTK_REASON="(VTK was not found)"
+      HAVE_VTK=no
+      AC_MSG_NOTICE("--with-vtk-library=DIR option was not defined")
+      DISABLE_VTK_REASON="(--with-vtk-library=DIR option was not defined)"
     fi
   else
-    AC_MSG_NOTICE("Specify --with-vtk-library to enable VTK support")
-    DISABLE_VTK_REASON_LIB="(VTK libraries were not found)"
+    HAVE_VTK=no
   fi
 fi
 
@@ -1161,11 +1153,11 @@
     DISABLE_VIS_REASON="(FREETYPE not found)"
     ENABLE_VIS=no
   fi
-  if test "xyes" = "x$ENABLE_VIS" -a "xyes" != "x$HAVE_VTK"; then
-    AC_MSG_NOTICE([Disabling Visualization: VTK not found])
-    DISABLE_VIS_REASON="(VTK not found)"
-    ENABLE_VIS=no
-  fi
+#  if test "xyes" = "x$ENABLE_VIS" -a "xyes" != "x$HAVE_VTK"; then
+#    AC_MSG_NOTICE([Disabling Visualization: VTK not found])
+#    DISABLE_VIS_REASON="(VTK not found)"
+#    ENABLE_VIS=no
+#  fi
 else
   DISABLE_VIS_REASON="(Disabled)"
 fi