Build clDNN when building IntelGPU (#2074)

* build seems to work

* cleanup

* add backsuport for using pre-built clDNN library

* fix typo

CMakeLists.txt

@@ -267,6 +267,7 @@ include(cmake/external_gtest.cmake)
 include(cmake/external_json.cmake)
 include(cmake/external_eigen.cmake)
 include(cmake/external_mkldnn.cmake)
+include(cmake/external_cldnn.cmake)
 
 if (NGRAPH_USE_PREBUILT_LLVM OR DEFINED LLVM_TARBALL_URL)
     include(cmake/external_llvm_prebuilt.cmake)

cmake/external_cldnn.cmake

+# ******************************************************************************
+# Copyright 2017-2018 Intel Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# 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.
+# ******************************************************************************
+
+# Enable ExternalProject CMake module
+include(ExternalProject)
+
+#------------------------------------------------------------------------------
+# Download and install GoogleTest ...
+#------------------------------------------------------------------------------
+
+set(CLDNN_GIT_REPO_URL https://github.com/intel/clDNN.git)
+set(CLDNN_GIT_LABEL df28d2861716cac7a6a9eff4e49e47162959a748)
+set(BOOST_VERSION 1.64.0)
+set(OUT_DIR ${EXTERNAL_PROJECTS_ROOT}/cldnn/out)
+
+set(COMPILE_FLAGS -fPIC)
+if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+    if (DEFINED NGRAPH_USE_CXX_ABI)
+        set(COMPILE_FLAGS "${COMPILE_FLAGS} -D_GLIBCXX_USE_CXX11_ABI=${NGRAPH_USE_CXX_ABI}")
+    endif()    
+endif()
+
+ExternalProject_Add(
+    ext_cldnn
+    PREFIX cldnn
+    GIT_REPOSITORY ${CLDNN_GIT_REPO_URL}
+    GIT_TAG ${CLDNN_GIT_LABEL}
+    # Disable install step
+    INSTALL_COMMAND ""
+    UPDATE_COMMAND ""
+    CMAKE_ARGS 
+                # -DCLDNN__OUTPUT_DIR=out/Debug
+                -DCMAKE_BUILD_TYPE=Release
+                -DCLDNN__BOOST_VERSION=${BOOST_VERSION}
+                -DCLDNN__INCLUDE_TESTS=FALSE
+                -DCLDNN__INCLUDE_TUTORIAL=FALSE
+    EXCLUDE_FROM_ALL TRUE
+    )
+
+#------------------------------------------------------------------------------
+
+add_library(libcldnn INTERFACE)
+if (CLDNN_ROOT_DIR)
+    find_package(CLDNN REQUIRED)
+    target_include_directories(libcldnn SYSTEM INTERFACE ${CLDNN_INCLUDE_DIRS})
+    target_link_libraries(libcldnn INTERFACE ${CLDNN_LIBRARIES})
+else()
+    ExternalProject_Get_Property(ext_cldnn SOURCE_DIR BINARY_DIR)
+    add_dependencies(libcldnn ext_cldnn)
+    target_include_directories(libcldnn SYSTEM INTERFACE ${SOURCE_DIR}/api)
+    target_link_libraries(libcldnn INTERFACE ${SOURCE_DIR}/build/out/Linux64/Release/libclDNN64.so)
+endif()

src/ngraph/runtime/intelgpu/CMakeLists.txt

@@ -30,13 +30,12 @@ set(SRC
 
 if (NGRAPH_INTELGPU_ENABLE)
     add_library(intelgpu_backend SHARED ${SRC})
-    set_target_properties(intelgpu_backend PROPERTIES VERSION ${NGRAPH_VERSION} SOVERSION ${NGRAPH_API_VERSION})
-    target_link_libraries(intelgpu_backend PUBLIC ngraph)
-    set_target_properties(intelgpu_backend PROPERTIES LIBRARY_OUTPUT_DIRECTORY ${NGRAPH_BUILD_DIR})
-
-    find_package(CLDNN REQUIRED)
-    target_include_directories(intelgpu_backend SYSTEM PUBLIC ${CLDNN_INCLUDE_DIRS})
-    target_link_libraries(intelgpu_backend PUBLIC ${CLDNN_LIBRARIES})
+    target_link_libraries(intelgpu_backend PUBLIC ngraph libcldnn)
+    set_target_properties(intelgpu_backend
+        PROPERTIES
+            VERSION ${NGRAPH_VERSION}
+            SOVERSION ${NGRAPH_API_VERSION}
+            LIBRARY_OUTPUT_DIRECTORY ${NGRAPH_BUILD_DIR})
 
     install(TARGETS intelgpu_backend LIBRARY DESTINATION ${NGRAPH_INSTALL_LIB})
 endif()