Enable building shared libraries

CMake/VTKmConfig.cmake.in

@@ -63,6 +63,7 @@ else()
   set_and_check(VTKm_CMAKE_MODULE_PATH "@VTKm_SOURCE_DIR@/CMake")
 endif()
 
+set(VTKm_BUILD_SHARED_LIBS "@BUILD_SHARED_LIBS@")
 set(VTKm_ENABLE_CUDA "@VTKm_ENABLE_CUDA@")
 set(VTKm_ENABLE_TBB "@VTKm_ENABLE_TBB@")
 set(VTKm_ENABLE_OPENGL_INTEROP "@VTKm_ENABLE_OPENGL_INTEROP@")

CMake/VTKmMacros.cmake

@@ -627,6 +627,14 @@ function(vtkm_library)
 
   target_compile_options(${lib_name} PRIVATE ${VTKm_COMPILE_OPTIONS})
 
+  # Make sure libraries go to lib directory and dll go to bin directory.
+  # Mostly important on Windows.
+  set_target_properties(${lib_name} PROPERTIES
+    ARCHIVE_OUTPUT_DIRECTORY ${LIBRARY_OUTPUT_PATH}
+    LIBRARY_OUTPUT_DIRECTORY ${LIBRARY_OUTPUT_PATH}
+    RUNTIME_OUTPUT_DIRECTORY ${EXECUTABLE_OUTPUT_PATH}
+    )
+
   if(MSVC)
     vtkm_setup_msvc_properties(${lib_name})
   endif()

CMakeLists.txt

@@ -114,6 +114,9 @@ option(VTKm_USE_DOUBLE_PRECISION
   )
 option(VTKm_USE_64BIT_IDS "Use 64-bit indices." ON)
 
+option(BUILD_SHARED_LIBS "Build VTK-m with shared libraries" ON)
+set(VTKm_BUILD_SHARED_LIBS ${BUILD_SHARED_LIBS})
+
 if (VTKm_ENABLE_TESTING)
   enable_testing()
   include(CTest)

vtkm/internal/Configure.h.in

@@ -119,6 +119,8 @@
 # endif
 #endif
 
+#cmakedefine VTKm_BUILD_SHARED_LIBS
+
 // Define a pair of macros, VTKM_THIRDPARTY_PRE_INCLUDE and VTKM_THIRDPARTY_POST_INCLUDE,
 // that should be wrapped around any #include for a boost or thrust header file. Mostly
 // this is used to set pragmas that dissable warnings that VTK-m checks for