message: Add compile guards to header file
diff: @@ -15,6 +15,8 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
  ==============================================================================*/
  +#ifndef TENSORFLOW_COMPILER_PLUGIN_POPLAR_DRIVER_XLA_IPU_COMMON_H_
  +#define TENSORFLOW_COMPILER_PLUGIN_POPLAR_DRIVER_XLA_IPU_COMMON_H_
  #include "tensorflow/core/framework/types.h"
  @@ -28,3 +30,5 @@ constexpr std::array<DataType, 6> kIpuAllTypes = {
  {DT_INT32, DT_INT64, DT_FLOAT, DT_HALF, DT_BOOL, DT_RESOURCE}};
  } // namespace tensorflow
  +
  +#endif
  \ No newline at end of file
  