CMake based build for pyngraph module

ngraph/python/BUILDING.md

@@ -28,7 +28,29 @@ Install Cython in the Python installation, or virtualenv which you are planning
 
     pip3 install cython
 
-### Configure, build and install OpenVINO
+### Build nGraph Python wheel
+
+We can build the Python wheel by issuing the following command:
+
+    cd "${MY_OPENVINO_BASEDIR}/openvino/ngraph/python"
+    python3 setup.py bdist_wheel
+
+Once completed, the wheel package should be located under the following path:
+
+    $ ls "${MY_OPENVINO_BASEDIR}/openvino/ngraph/python/dist/"
+    ngraph_core-0.0.0-cp38-cp38-linux_x86_64.whl
+
+You can now install the wheel in your Python environment:
+
+    cd "${MY_OPENVINO_BASEDIR}/openvino/ngraph/python/dist/"
+    pip3 install ngraph_core-0.0.0-cp38-cp38-linux_x86_64.whl
+
+#### What does `python3 setup.py bdist_wheel` do?
+
+The `python3 setup.py bdist_wheel` use CMake to build ngraph python bindings and pack module into a wheel package.
+You can recreate the process manually using OpenVINO build instructions: 
+
+ ### Configure, build and install OpenVINO
 
 The following section will illustrate how to download, build and install OpenVINO in a workspace directory specified
 by the `${MY_OPENVINO_BASEDIR}` variable. Let's start by setting this variable to a directory of your choice: 
@@ -62,42 +84,26 @@ variable. Examples:
 ```
 -DPYTHON_EXECUTABLE=/path/to/venv/bin/python
 -DPYTHON_EXECUTABLE=$(which python3.8)
-```
+```   
 
-### Build nGraph Python wheel
-
-When OpenVINO is built and installed, we can build the Python wheel by issuing the following command:
-
-    make python_wheel
-
-Once completed, the wheel package should be located under the following path:
-
-    $ ls "${MY_OPENVINO_BASEDIR}/openvino/ngraph/python/dist/"
-    ngraph_core-0.0.0-cp38-cp38-linux_x86_64.whl
+## Build nGraph Python Wheels on Windows
 
-You can now install the wheel in your Python environment:
+### Prerequisites
 
-    cd "${MY_OPENVINO_BASEDIR}/openvino/ngraph/python/dist/"
-    pip3 install ngraph_core-0.0.0-cp38-cp38-linux_x86_64.whl
+In order to build OpenVINO and the nGraph Python wheel on Windows, you will need to install Visual Studio and Python. 
 
-#### What does `make python_wheel` do?
+Once Python is installed, you will also need to install Cython using `pip install cython`.
 
-The `python_wheel` target automates a few steps, required to build the wheel package. You can recreate the process 
-manually by issuing the following commands: 
+Build the Python wheel package:
 
     cd "${MY_OPENVINO_BASEDIR}/openvino/ngraph/python"
-    git clone --branch v2.5.0 https://github.com/pybind/pybind11.git
-    export NGRAPH_CPP_BUILD_PATH="${MY_OPENVINO_BASEDIR}/openvino_dist"
-    python3 setup.py bdist_wheel
-
-
-## Build nGraph Python Wheels on Windows
-
-### Prerequisites
+    python setup.py bdist_wheel
 
-In order to build OpenVINO and the nGraph Python wheel on Windows, you will need to install Visual Studio and Python. 
+The final wheel should be located in `ngraph\python\dist` directory.
 
-Once Python is installed, you will also need to install Cython using `pip install cython`.  
+    dir openvino\ngraph\python\dist\
+    10/09/2020  04:06 PM         4,010,943 ngraph_core-0.0.0-cp38-cp38-win_amd64.whl
+
 
 ### Configure, build and install OpenVINO
 
@@ -142,16 +148,6 @@ In order to build and install OpenVINO, build the `install` target:
 In this step OpenVINO will be built and installed to the directory specified above. You can
 adjust the number of threads used in the building process to your machine's capabilities.
 
-Build the Python wheel package:
-
-    cmake --build . --target python_wheel --config Release -j 8
-
-The final wheel should be located in `ngraph\python\dist` directory.
-
-    dir openvino\ngraph\python\dist\
-    10/09/2020  04:06 PM         4,010,943 ngraph_core-0.0.0-cp38-cp38-win_amd64.whl
-
-
 ## Run tests
 
 ### Using a virtualenv (optional)

ngraph/python/CMakeLists.txt

@@ -18,28 +18,67 @@ cmake_minimum_required (VERSION 3.13)
 
 project (pyngraph)
 
-include(ExternalProject)
-
-ExternalProject_Add(
-        pybind11
-        GIT_REPOSITORY "https://github.com/pybind/pybind11.git"
-        GIT_TAG "v2.5.0"
-        SOURCE_DIR "${CMAKE_CURRENT_BINARY_DIR}/pybind11"
-        CONFIGURE_COMMAND ""
-        BUILD_COMMAND ""
-        INSTALL_COMMAND ""
-)
+if(NOT DEFINED IE_MAIN_SOURCE_DIR)
+    find_package(InferenceEngineDeveloperPackage)
+    find_package(ngraph REQUIRED)    
+endif()
+
+if(ngraph_FOUND)
+    message("ngraph version = {${ngraph_VERSION}}")
+endif()
 
-set(BUILD_PY_IN "${CMAKE_CURRENT_SOURCE_DIR}/build_wheel.py.in")
-set(BUILD_PY    "${CMAKE_CURRENT_BINARY_DIR}/build_wheel.py")
-configure_file(${BUILD_PY_IN} ${BUILD_PY} @ONLY)
+include(FetchContent)
 
-add_custom_command(
-        DEPENDS pybind11
-        OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/dist/
-        POST_BUILD
-        WORKING_DIR ${CMAKE_CURRENT_BINARY_DIR}
-        COMMAND python ${BUILD_PY}
+FetchContent_Declare(
+    pybind11
+    GIT_REPOSITORY "https://github.com/pybind/pybind11.git"
+    GIT_TAG        "v2.5.0"
 )
 
-add_custom_target(python_wheel DEPENDS ngraph ${CMAKE_CURRENT_BINARY_DIR}/dist/)
+FetchContent_GetProperties(pybind11)
+if(NOT pybind11_POPULATED)
+    FetchContent_Populate(pybind11)
+    add_subdirectory(${pybind11_SOURCE_DIR} ${pybind11_BINARY_DIR})
+endif()
+
+find_package(Python COMPONENTS Interpreter Development REQUIRED)
+
+if(PYTHON_FOUND)
+    set(PYTHON_VERSION python${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR})
+    message("Python version={${Python_VERSION}}")
+else()
+    message(FATAL_ERROR "Python was not found!")
+endif()
+
+if(CMAKE_COMPILER_IS_GNUCXX)
+    add_compile_options(-fPIC)
+endif()
+
+if (APPLE)
+    add_link_options(-stdlib=libc++)
+endif()
+
+if (CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
+    #disable warning: This operator was deprecated and will be removed with v0 operation.
+    add_compile_options(/wd4996) 
+endif()
+
+file(GLOB_RECURSE SOURCES src/pyngraph/*.cpp)
+pybind11_add_module(_${PROJECT_NAME} MODULE ${SOURCES})
+target_include_directories(_${PROJECT_NAME} PRIVATE src)
+target_link_libraries(_${PROJECT_NAME} PRIVATE ngraph::ngraph ngraph::onnx_importer)
+
+if(InferenceEngineDeveloperPackage_FOUND)
+    ie_cpack_add_component(pyngraph_${PYTHON_VERSION})
+
+    install(TARGETS _${PROJECT_NAME} 
+            DESTINATION python/${PYTHON_VERSION}
+            COMPONENT pyngraph_${PYTHON_VERSION})
+
+    install(DIRECTORY ${CMAKE_CURRENT_LIST_DIR}/src/ngraph
+            DESTINATION python/${PYTHON_VERSION}
+            COMPONENT pyngraph_${PYTHON_VERSION}
+            USE_SOURCE_PERMISSIONS)
+
+    ie_cpack(pyngraph_${PYTHON_VERSION})
+endif()