"Undefined symbols for architecture arm64:" when link with `-framework MNN`

[HeloWong]

Platform(Include target platform as well if cross-compiling): MacOS with M2

Github Version: 2.9.0

it happened when use release/mnn_2.9.0_macos_x64_arm82_cpu_opencl_metal.zip and link it with -framework MNN

Undefined symbols for architecture arm64: [build] "_CFRelease", referenced from: [build] MNN::MetalRuntime::create(MNN::Backend::Info const&, id) in MNN[arm64]355 [build] MNN::MetalRuntime::~MetalRuntime() in MNN[arm64]355 [build] "_MTLCreateSystemDefaultDevice", referenced from: ... MNN::Pipeline::_pushTuningTask(std::1::vector<MNN::Schedule::OpCacheInfo, std::1::allocator>&&) in MNN[arm64]12 [build] MNN::ThreadPool::ThreadPool(int) in MNN[arm64]222 [build] "std::1::ctype::id", referenced from: [build] std::1::basic_ostream<char, std::1::char_traits>& std::1::put_character_sequence[abi:un170006]<char, std::__1::char_traits>(std::1::basic_ostream<char, std::__1::char_traits>&, char const, unsigned long) in MNN[arm64]352 [build] "std::__1::mutex::lock()", referenced from: [build] MNN::Interpreter::updateCacheFile(MNN::Session, int) in MNN[arm64]9

Has anyone encountered a similar situation? Could you give me some help?

[HeloWong]

Here is my CMakeLists.txt and Test Code comparison with OpenCV Framework And OpenCV works fine.

cmake_minimum_required(VERSION 3.10)
project(hello_cv LANGUAGES CXX)

set(OpenCV_DIR "3rd_party")
find_library(
    opencv 
    NAMES opencv2
    PATHS ${OpenCV_DIR}/
)
if (${opencv} MATCHES opencv-NOTFOUND)
  message(STATUS "  Can't find opencv in ${OpenCV_DIR}")
else()
  message(STATUS "  found ${opencv}")
endif()

set(MNN_DIR "./3rd_party/MNN-2.9.0/Static")
find_library(
    mnn 
    NAMES MNN
    PATHS ${MNN_DIR}/
)
if (${mnn} MATCHES mnn-NOTFOUND)
  message(STATUS "  Can't find mnn in ${MNN_DIR}")
else()
  message(STATUS "  found ${mnn}")
endif()

add_executable(${PROJECT_NAME} main.cc)
set_target_properties(${PROJECT_NAME} PROPERTIES 
    CXX_STANDARD 14)
target_link_libraries(${PROJECT_NAME}
    ${opencv}
    ${mnn}
)
target_include_directories(${PROJECT_NAME}
   PUBLIC ${OpenCV_DIR}/opencv2.framework/Headers
   PUBLIC ${MNN_DIR}/MNN.framework/Headers
)

#include <iostream>
#include "opencv2/opencv.hpp"
#include "MNN/Interpreter.hpp"

int main()
{
    std::cout << cv::getVersionString() << std::endl;
    std::cout << MNN::getVersion() << std::endl;
    return 0;
}

[jxt1234]

Add this in Your CMakeLists.txt: find_library(FOUNDATION Foundation) target_link_libraries(${You_lib} PUBLIC ${FOUNDATION})

[jxt1234]

See MNN's CMakeLists.txt 735-741 line:

  find_library(FOUNDATION Foundation REQUIRED)
  target_link_libraries(MNN PUBLIC ${FOUNDATION})
  find_library(METAL Metal REQUIRED)
  target_link_libraries(MNN PUBLIC ${METAL})
  find_library(GRAPHIC CoreGraphics)
  target_link_libraries(MNN PUBLIC ${GRAPHIC})

[HeloWong]

Thank you, it works

...
find_library(FOUNDATION Foundation)
find_library(METAL Metal REQUIRED)
find_library(GRAPHIC CoreGraphics)

target_link_libraries(${You_lib} 
 PUBLIC ${FOUNDATION}
 PUBLIC ${METAL}
 PUBLIC ${GRAPHIC}
)