restore vtkm_filter_common with a dummy .cxx

vtkm/filter/CMakeLists.txt

@@ -58,7 +58,6 @@ set(common_headers
   TaskQueue.h
   Instantiations.h
   )
-vtkm_declare_headers(${common_headers})
 
 set(common_header_template_sources
   CellMeasures.hxx
@@ -69,7 +68,10 @@ set(common_header_template_sources
   FilterParticleAdvection.hxx
   FilterTemporalParticleAdvection.hxx
   )
-vtkm_declare_headers(${common_header_template_sources})
+
+set(common_sources_device
+  Filter.cxx
+  )
 
 set(extra_headers
   AmrArrays.h
@@ -197,6 +199,15 @@ vtkm_library(
 
 add_library(vtkm_filter INTERFACE)
 
+# Deprecated!!! Just to make all the CMake magic work!!!
+vtkm_library(
+  NAME vtkm_filter_common
+  TEMPLATE_SOURCES ${common_header_template_sources}
+  HEADERS ${common_headers}
+  DEVICE_SOURCES ${common_sources_device}
+  USE_VTKM_JOB_POOL
+)
+
 vtkm_library(
   NAME vtkm_filter_extra
   TEMPLATE_SOURCES ${extra_header_template_sources}

vtkm/filter/Filter.cxx

@@ -0,0 +1,23 @@
+//============================================================================
+//  Copyright (c) Kitware, Inc.
+//  All rights reserved.
+//  See LICENSE.txt for details.
+//
+//  This software is distributed WITHOUT ANY WARRANTY; without even
+//  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+//  PURPOSE.  See the above copyright notice for more information.
+//============================================================================
+
+namespace vtkm
+{
+namespace filter
+{
+namespace
+{
+void dummy()
+{
+  // The sole purpose of my existence is to generate a .h file by CMake.
+}
+}
+}
+}