Added auto generated configs for nGraph (#3790)

* Added auto generated configs for nGraph

* Fixed absolute paths

* Fixed comments

CMakeLists.txt

@@ -629,8 +629,30 @@ if (NGRAPH_PYTHON_BUILD_ENABLE)
     add_subdirectory(python)
 endif()
 
+include(CMakePackageConfigHelpers)
+
+export(TARGETS ngraph NAMESPACE ngraph:: FILE "${CMAKE_CURRENT_BINARY_DIR}/ngraphTargets.cmake")
+
+install(EXPORT ngraphTargets
+    FILE ngraphTargets.cmake
+    NAMESPACE ngraph::
+    DESTINATION cmake)
+
+configure_package_config_file(${CMAKE_CURRENT_SOURCE_DIR}/cmake/share/ngraphConfig.cmake.in
+    ${CMAKE_CURRENT_BINARY_DIR}/ngraphConfig.cmake
+    INSTALL_DESTINATION cmake)
+
+write_basic_package_version_file(${CMAKE_CURRENT_BINARY_DIR}/ngraphConfigVersion.cmake
+    VERSION ${NGRAPH_VERSION}
+    COMPATIBILITY SameMajorVersion)
+
 install(DIRECTORY
     ${CMAKE_CURRENT_SOURCE_DIR}/licenses
     DESTINATION "${CMAKE_INSTALL_PREFIX}"
 )
 install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/LICENSE DESTINATION ${CMAKE_INSTALL_PREFIX})
+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/VERSION DESTINATION ${CMAKE_INSTALL_PREFIX})
+
+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/ngraphConfig.cmake
+    ${CMAKE_CURRENT_BINARY_DIR}/ngraphConfigVersion.cmake
+    DESTINATION ${CMAKE_INSTALL_PREFIX}/cmake )

cmake/share/ngraphConfig.cmake.in

+# ******************************************************************************
+# 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.
+# ******************************************************************************
+#
+#
+# FindNGraph
+# ------
+#
+# This will define the following variables:
+#
+#   ngraph_FOUND        - True if the system has the nGraph library
+#   NGRAPH_LIBRARIES    - nGraph libraries
+#   ngraph::ngraph      - nGraph core target
+#
+#
+
+@PACKAGE_INIT@
+
+include(CMakeFindDependencyMacro)
+find_dependency(Threads)
+
+if(NOT TARGET ngraph)
+    include("${CMAKE_CURRENT_LIST_DIR}/ngraphTargets.cmake")
+endif()
+
+set(NGRAPH_LIBRARIES ngraph::ngraph)
+check_required_components(ngraph)

src/ngraph/CMakeLists.txt

@@ -644,7 +644,11 @@ elseif(APPLE)
 endif()
 
 # Defines macro in C++ to load backend plugin
-target_include_directories(ngraph PUBLIC "${NGRAPH_INCLUDE_PATH}")
+target_include_directories(ngraph PUBLIC $<BUILD_INTERFACE:${NGRAPH_INCLUDE_PATH}> $<INSTALL_INTERFACE:include>)
+
+#Add an alias so that library can be used inside the build tree, e.g. when testing
+add_library(ngraph::ngraph ALIAS ngraph)
+
 if (NOT WIN32)
     find_package(Threads REQUIRED)
     target_link_libraries(ngraph PUBLIC dl Threads::Threads)
@@ -669,8 +673,7 @@ endif()
 #-----------------------------------------------------------------------------------------------
 
 # nGraph
-install(FILES ${CMAKE_BINARY_DIR}/VERSION DESTINATION ${CMAKE_INSTALL_PREFIX})
-install(TARGETS ngraph DESTINATION ${NGRAPH_INSTALL_LIB})  # libngraph.so
+install(TARGETS ngraph DESTINATION ${CMAKE_INSTALL_LIBDIR} EXPORT ngraphTargets)  # libngraph.so
 install(DIRECTORY
     ${CMAKE_CURRENT_SOURCE_DIR}/
     DESTINATION "${NGRAPH_INSTALL_INCLUDE}/ngraph"
@@ -678,7 +681,7 @@ install(DIRECTORY
         PATTERN "*.hpp"
         PATTERN "*.h"
 )
-install(FILES ${CMAKE_BINARY_DIR}/src/ngraph/version.hpp
+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/version.hpp
     DESTINATION "${NGRAPH_INSTALL_INCLUDE}/ngraph")
 
 set(CPACK_GENERATOR "DEB")