Missing executor_manager Method in Cross-Compiled openvino.dll

[max-my]

Dear OpenVINO Team,
I'm facing an issue with my cross-compiled openvino.dll where the ov::threading::executor_manager() method is missing. I have verified this by printing all symbols in the openvino.dll and found that executor_manager is not present. This absence causes an error when I try to instantiate ov::Core core;.
Here is my CMake configuration:

        cmake .. -G "Ninja" ${CMAKE_EXTEND_OPTIONS} \
        -DCMAKE_TOOLCHAIN_FILE=${cross_compile_toolchain_file} \
        -DCMAKE_BUILD_TYPE=RELEASE \
        -DCMAKE_C_FLAGS="${DEFAULT_CFLAGS} -D_USE_MATH_DEFINES" \
        -DCMAKE_CXX_FLAGS="${DEFAULT_CXXFLAGS} -D_USE_MATH_DEFINES" \
        -DENABLE_TBBBIND_2_5=OFF \
        -DENABLE_TBB_RELEASE_ONLY=OFF \
        -DENABLE_INTEL_GNA=OFF \
        -DTHREADING=SEQ \
        -DENABLE_SAMPLES=OFF \
        -DENABLE_TESTS=OFF \
        -DCMAKE_INSTALL_PREFIX=${archiving_src}

Could you please advise if there's a specific setting or flag I might have missed? Any help would be greatly appreciated.
Thank you!

[ilya-lavrenov]

As we can see:

openvino/src/inference/src/dev/threading/executor_manager.cpp

Lines 207 to 210 in eba8f10

	std::shared_ptr<ExecutorManager> executor_manager() {
	static ExecutorManagerHolder executorManagerHolder;
	return executorManagerHolder.get();
	}

Executor manager is not under any conditions which can result in missed symbol.

• Could you please provide information about your platform?
• What is cross_compile_toolchain_file and CMAKE_EXTEND_OPTIONS ?
• Do you use static or dynamic build? value of BUILD_SHARED_LIBS

[max-my]

Thank you for your prompt response. Here are the details you requested:

1. Platform: I compile Windows x86_64 product on Linux version 5.15.0-25-generic (buildd@ubuntu) (gcc (Ubuntu 11.2.0-19ubuntu1) 11.2.0, GNU ld (GNU Binutils for Ubuntu) 2.38) #25-Ubuntu SMP Wed Mar 30 15:54:22 UTC 2022.
2. Cross-compile toolchain file: I am using a toolchain file which is like this

# Sample toolchain file for building for Windows from an Ubuntu Linux system.
set(CMAKE_SYSTEM_NAME Windows)
set(CMAKE_SYSTEM_PROCESSOR x86_64)

# cross compilers to use for C, C++ and Fortran
set(CMAKE_C_COMPILER /opt/buildtools/toolchains/clang-mingw-linux-gnu/bin/x86_64-w64-mingw32-clang)
set(CMAKE_CXX_COMPILER /opt/buildtools/toolchains/clang-mingw-linux-gnu/bin/x86_64-w64-mingw32-clang++)
set(CMAKE_FIND_ROOT_PATH /opt/buildtools/toolchains/clang-mingw-linux-gnu)

# modify default behavior of FIND_XXX() commands
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

add_compile_options(
    -Wno-attributes
    -fstack-protector-strong
    -g
    -ggdb
    -gcodeview
    -fno-delete-null-pointer-checks
    -fno-omit-frame-pointer
    -fdebug-prefix-map=$ENV{PWD}=.
    -O2
    -Wno-inconsistent-dllimport
    -Wno-dll-attribute-on-redeclaration
)

add_link_options(
    -fstack-protector-strong
    -Wl,--nxcompat
    -Wl,--dynamicbase
    -Wl,--no-seh
    -Wl,--pdb=
)

add_compile_definitions(_WIN32_WINNT=0x0601)

set(CMAKE_CXX_STANDARD 17)

4. CMAKE_EXTEND_OPTIONS: I have not used any specific CMAKE_EXTEND_OPTIONS in my configuration. it‘s empty.
5. Static or dynamic build: I am aiming for a dynamic build. The value of BUILD_SHARED_LIBS is set to ON.

Please let me know if you need any further information. I appreciate your help in resolving this issue.

[ilya-lavrenov]

Basically, we don't support MinGW

Could you please share where toolchain can be downloaded?

[max-my]

I'm still looking for the download address for MinGW and will provide it once I find it.
I made some code modifications before compilation, as shown below:

# mingw32-clang does not support the --exclude-libs linking option
sed -i 's/-Wl,--exclude-libs,ALL//g' cmake/developer_package/compile_flags/os_flags.cmake

# The windows dependency libraries that come with mingw are all lowercase
sed -i 's/Shlwapi/shlwapi/g' src/common/util/CMakeLists.txt

# Mingw cross-compilation does not need to generate VS information, make the function return directly
sed -i '31d' cmake/developer_package/vs_version/vs_version.cmake
sed -i '29d' cmake/developer_package/vs_version/vs_version.cmake

Could you please advise on whether my code modifications might be causing this issue?

[max-my]

I'm not sure why, but I fixed my problem by moving executor_manager into core_impl

cat src/inference/src/dev/core_impl.cpp >> src/inference/src/dev/threading/executor_manager.cpp
mv src/inference/src/dev/threading/executor_manager.cpp src/inference/src/dev/core_impl.cpp