Merge pull request #3352 from NervanaSystems/cyphers/plaidwin

Add windows symbol export support

src/ngraph/runtime/plaidml/CMakeLists.txt

@@ -74,6 +74,8 @@ target_include_directories(plaidml_backend SYSTEM PUBLIC ${PLAIDML_INCLUDE_DIRS}
 target_link_libraries(plaidml_backend PUBLIC ngraph libplaidml)
 install(TARGETS plaidml_backend LIBRARY DESTINATION ${NGRAPH_INSTALL_LIB})
 
+target_compile_definitions(plaidml_backend PRIVATE PLAIDML_BACKEND_DLL_EXPORTS)
+
 set(CMAKE_MACOSX_RPATH 1)
 if(APPLE)
     set_property(TARGET plaidml_backend PROPERTY INSTALL_RPATH "@loader_path/;@loader_path/../../..")

src/ngraph/runtime/plaidml/plaidml_backend_visibility.hpp

+//*****************************************************************************
+// Copyright 2017-2019 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.
+//*****************************************************************************
+
+// https://gcc.gnu.org/wiki/Visibility
+// Generic helper definitions for shared library support
+#if defined _WIN32 || defined __CYGWIN__
+#define PLAIDML_BACKEND_HELPER_DLL_IMPORT __declspec(dllimport)
+#define PLAIDML_BACKEND_HELPER_DLL_EXPORT __declspec(dllexport)
+#define PLAIDML_BACKEND_HELPER_DLL_LOCAL
+#else
+#if __GNUC__ >= 4
+#define PLAIDML_BACKEND_HELPER_DLL_IMPORT __attribute__((visibility("default")))
+#define PLAIDML_BACKEND_HELPER_DLL_EXPORT __attribute__((visibility("default")))
+#define PLAIDML_BACKEND_HELPER_DLL_LOCAL __attribute__((visibility("hidden")))
+#else
+#define PLAIDML_BACKEND_HELPER_DLL_IMPORT
+#define PLAIDML_BACKEND_HELPER_DLL_EXPORT
+#define PLAIDML_BACKEND_HELPER_DLL_LOCAL
+#endif
+#endif
+
+// Now we use the generic helper definitions above to define PLAIDML_BACKEND_API and PLAIDML_BACKEND_LOCAL.
+// PLAIDML_BACKEND_API is used for the public API symbols. It either DLL imports or DLL exports
+//    (or does nothing for static build)
+// PLAIDML_BACKEND_LOCAL is used for non-api symbols.
+
+// #ifdef PLAIDML_BACKEND_DLL         // defined if PLAIDML_BACKEND is compiled as a DLL
+#ifdef PLAIDML_BACKEND_DLL_EXPORTS // defined if we are building the PLAIDML_BACKEND DLL (instead of using it)
+#define PLAIDML_BACKEND_API PLAIDML_BACKEND_HELPER_DLL_EXPORT
+#else
+#define PLAIDML_BACKEND_API PLAIDML_BACKEND_HELPER_DLL_IMPORT
+#endif // PLAIDML_BACKEND_DLL_EXPORTS
+#define PLAIDML_BACKEND_LOCAL PLAIDML_BACKEND_HELPER_DLL_LOCAL
+// #else // PLAIDML_BACKEND_DLL is not defined: this means PLAIDML_BACKEND is a static lib.
+// #define PLAIDML_BACKEND_API
+// #define PLAIDML_BACKEND_LOCAL
+// #endif // PLAIDML_BACKEND_DLL