Fix config issues with headers and libraries

There were a couple of places where the configure scripts did not add
either includes to VTKm_INCLUDE_DIRS or libraries to VTKm_LIBRARIES.

The biggest offender was when the examples used find_package to load the
VTK-m configuration it needed. find_package cleared out the includes and
libraries, but it did not clear out the VTKm_<COMPONENT>_FOUND
variables. Normally, these variables would not be set before
find_package is called, but in this case the examples were called after
some partial configuration. I got around this issue by clearing out all
the *_FOUND variables in VTKmConfig.cmake.

CMake/VTKmConfig.cmake.in

@@ -52,6 +52,9 @@ if(VTKm_PACKAGE_IN_BUILD)
   set(VTKm_INCLUDE_DIRS ${VTKm_INCLUDE_DIRS} "@VTKm_SOURCE_DIR@")
 endif()
 
+# Clear out the libraries. We will add more when loading components.
+set(VTKm_LIBRARIES)
+
 set(VTKm_REQUIRED_BOOST_VERSION "@VTKm_REQUIRED_BOOST_VERSION@")
 
 if(NOT VTKm_PACKAGE_IN_BUILD)

CMakeLists.txt

@@ -243,7 +243,16 @@ string(REPLACE ";" " " VTKm_AVAILABLE_COMPONENTS_LIST
   "${VTKm_AVAILABLE_COMPONENTS}"
   )
 
-set(VTKm_LOAD_COMPONENTS_COMMANDS "
+set(VTKm_LOAD_COMPONENTS_COMMANDS "# Clear out old FOUND flags")
+foreach(component ${VTKm_AVAILABLE_COMPONENTS})
+  set(VTKm_LOAD_COMPONENTS_COMMANDS "${VTKm_LOAD_COMPONENTS_COMMANDS}
+set(VTKm_${component}_FOUND)"
+    )
+endforeach(component)
+
+set(VTKm_LOAD_COMPONENTS_COMMANDS "${VTKm_LOAD_COMPONENTS_COMMANDS}
+
+# Load each component selected in find_package
 foreach(comp \${VTKm_FIND_COMPONENTS})")
 
 foreach(component ${VTKm_AVAILABLE_COMPONENTS})

examples/clipping/CMakeLists.txt

@@ -20,11 +20,10 @@
 ##
 ##=============================================================================
 #Find the VTK-m package
-find_package(VTKm QUIET REQUIRED COMPONENTS Base)
-
-vtkm_configure_component_Serial()
-vtkm_configure_component_CUDA()
-vtkm_configure_component_TBB()
+find_package(VTKm REQUIRED QUIET
+  COMPONENTS Base
+  OPTIONAL_COMPONENTS Serial Cuda TBB
+  )
 
 add_executable(Clipping_SERIAL Clipping.cxx)
 target_include_directories(Clipping_SERIAL PRIVATE ${VTKm_INCLUDE_DIRS})

examples/demo/CMakeLists.txt

@@ -21,15 +21,10 @@
 ##=============================================================================
 
 #Find the VTK-m package
-find_package(VTKm QUIET REQUIRED COMPONENTS Base)
-
-#configure the backend components
-vtkm_configure_component_Serial()
-vtkm_configure_component_CUDA()
-vtkm_configure_component_TBB()
-
-#configure the OSMesa component
-vtkm_configure_component_OSMESA()
+find_package(VTKm QUIET REQUIRED
+  COMPONENTS Base
+  OPTIONAL_COMPONENTS Serial Cuda TBB OSMesa
+  )
 
 if(VTKm_OSMesa_FOUND)
 

examples/hello_world/CMakeLists.txt

@@ -21,16 +21,10 @@
 ##=============================================================================
 
 #Find the VTK-m package
-find_package(VTKm QUIET REQUIRED COMPONENTS Base)
-
-#configure the backend components
-vtkm_configure_component_Serial()
-vtkm_configure_component_CUDA()
-vtkm_configure_component_TBB()
-
-#configure the rendering / interop components
-vtkm_configure_component_OpenGL()
-vtkm_configure_component_Interop()
+find_package(VTKm REQUIRED QUIET
+  COMPONENTS Base
+  OPTIONAL_COMPONENTS Serial Cuda TBB OpenGL Interop
+  )
 
 find_package(GLUT)
 

examples/isosurface/CMakeLists.txt

@@ -21,12 +21,10 @@
 ##=============================================================================
 
 #Find the VTK-m package
-find_package(VTKm QUIET REQUIRED COMPONENTS Base)
-
-vtkm_configure_component_OpenGL()
-vtkm_configure_component_Serial()
-vtkm_configure_component_CUDA()
-vtkm_configure_component_TBB()
+find_package(VTKm REQUIRED QUIET
+  COMPONENTS Base
+  OPTIONAL_COMPONENTS Serial Cuda TBB OpenGL
+  )
 
 find_package(GLUT)
 

examples/multi_backend/CMakeLists.txt

@@ -21,12 +21,10 @@
 ##=============================================================================
 
 #Find the VTK-m package
-find_package(VTKm QUIET REQUIRED COMPONENTS Base)
-
-#configure the backend components
-vtkm_configure_component_Serial()
-vtkm_configure_component_CUDA()
-vtkm_configure_component_TBB()
+find_package(VTKm REQUIRED QUIET
+  COMPONENTS Base
+  OPTIONAL_COMPONENTS Serial Cuda TBB
+  )
 
 if(VTKm_CUDA_FOUND)
   # Cuda compiles do not respect target_include_directories

examples/rendering/CMakeLists.txt

@@ -21,10 +21,10 @@
 ##=============================================================================
 
 #Find the VTK-m package
-find_package(VTKm QUIET REQUIRED COMPONENTS Base)
-
-vtkm_configure_component_OpenGL()
-vtkm_configure_component_Serial()
+find_package(VTKm REQUIRED QUIET
+  COMPONENTS Base
+  OPTIONAL_COMPONENTS Serial OpenGL
+  )
 
 find_package(GLUT)
 

examples/streamline/CMakeLists.txt

@@ -21,12 +21,10 @@
 ##=============================================================================
 
 #Find the VTK-m package
-find_package(VTKm QUIET REQUIRED COMPONENTS Base)
-
-vtkm_configure_component_OpenGL()
-vtkm_configure_component_Serial()
-vtkm_configure_component_CUDA()
-vtkm_configure_component_TBB()
+find_package(VTKm REQUIRED QUIET
+  COMPONENTS Base
+  OPTIONAL_COMPONENTS Serial Cuda TBB OpenGL
+  )
 
 find_package(GLUT)
 

examples/tetrahedra/CMakeLists.txt

@@ -21,12 +21,10 @@
 ##=============================================================================
 
 #Find the VTK-m package
-find_package(VTKm QUIET REQUIRED COMPONENTS Base)
-
-vtkm_configure_component_OpenGL()
-vtkm_configure_component_Serial()
-vtkm_configure_component_CUDA()
-vtkm_configure_component_TBB()
+find_package(VTKm REQUIRED QUIET
+  COMPONENTS Base
+  OPTIONAL_COMPONENTS Serial Cuda TBB OpenGL
+  )
 
 
 find_package(GLUT)

vtkm/CMakeLists.txt

@@ -18,8 +18,6 @@
 ##  this software.
 ##============================================================================
 
-include_directories(${Boost_INCLUDE_DIRS})
-
 set(headers
   Assert.h
   BinaryPredicates.h

vtkm/interop/testing/CMakeLists.txt

@@ -29,7 +29,10 @@ set(unit_tests
   )
 
 # Need glut for these tests
-if(GLUT_FOUND)
+if(VTKm_ENABLE_OPENGL_TESTS)
+  list(APPEND VTKm_INCLUDE_DIRS ${GLUT_INCLUDE_DIR} )
+  list(APPEND VTKm_LIBRARIES ${GLUT_LIBRARIES}  )
+
   vtkm_declare_headers(${headers})
 
   vtkm_unit_tests(SOURCES ${unit_tests})