把后端改成OpenCL，编译报错

[LiYufengzz]

在mac上编译运行成功了，想测试一下使用opencl是否会更快一点，但是编译报错
Undefined symbols for architecture x86_64:
"MNN::Interpreter::releaseModel()", referenced from:
LFFD::~LFFD() in MNN_LFFD.cpp.o
"MNN::Interpreter::resizeTensor(MNN::Tensor*, std::__1::vector<int, std::__1::allocator > const&)", referenced from:
LFFD::detect(cv::Mat&, std::__1::vector<FaceInfo, std::__1::allocator >&, int, int, float, float, int, std::__1::vector<int, std::__1::allocator >) in MNN_LFFD.cpp.o
"MNN::Interpreter::createSession(MNN::ScheduleConfig const&)", referenced from:
LFFD::LFFD(std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator > const&, int, int) in MNN_LFFD.cpp.o
"MNN::Interpreter::resizeSession(MNN::Session*)", referenced from:
LFFD::detect(cv::Mat&, std::__1::vector<FaceInfo, std::__1::allocator >&, int, int, float, float, int, std::__1::vector<int, std::__1::allocator >) in MNN_LFFD.cpp.o
"MNN::Interpreter::createFromFile(char const*)", referenced from:
LFFD::LFFD(std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator > const&, int, int) in MNN_LFFD.cpp.o
"MNN::Interpreter::releaseSession(MNN::Session*)", referenced from:
LFFD::~LFFD() in MNN_LFFD.cpp.o
"MNN::Interpreter::getSessionInput(MNN::Session const*, char const*)", referenced from:
LFFD::LFFD(std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator > const&, int, int) in MNN_LFFD.cpp.o
"MNN::Interpreter::getSessionOutput(MNN::Session const*, char const*)", referenced from:
LFFD::LFFD(std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator > const&, int, int) in MNN_LFFD.cpp.o
"MNN::Interpreter::~Interpreter()", referenced from:
std::__1::default_deleteMNN::Interpreter::operator()(MNN::Interpreter*) const in MNN_LFFD.cpp.o
"MNN::CV::ImageProcess::create(MNN::CV::ImageProcess::Config const&, MNN::Tensor const*)", referenced from:
LFFD::detect(cv::Mat&, std::__1::vector<FaceInfo, std::__1::allocator >&, int, int, float, float, int, std::__1::vector<int, std::__1::allocator >) in MNN_LFFD.cpp.o
"MNN::CV::ImageProcess::convert(unsigned char const*, int, int, int, MNN::Tensor*)", referenced from:
LFFD::detect(cv::Mat&, std::__1::vector<FaceInfo, std::__1::allocator >&, int, int, float, float, int, std::__1::vector<int, std::__1::allocator >) in MNN_LFFD.cpp.o
"MNN::CV::ImageProcess::~ImageProcess()", referenced from:
std::__1::default_deleteMNN::CV::ImageProcess::operator()(MNN::CV::ImageProcess*) const in MNN_LFFD.cpp.o
"MNN::Tensor::Tensor(MNN::Tensor const*, MNN::Tensor::DimensionType, bool)", referenced from:
LFFD::detect(cv::Mat&, std::__1::vector<FaceInfo, std::__1::allocator >&, int, int, float, float, int, std::__1::vector<int, std::__1::allocator >) in MNN_LFFD.cpp.o
"MNN::Tensor::~Tensor()", referenced from:
LFFD::detect(cv::Mat&, std::__1::vector<FaceInfo, std::__1::allocator >&, int, int, float, float, int, std::__1::vector<int, std::__1::allocator >) in MNN_LFFD.cpp.o
"MNN::Interpreter::runSession(MNN::Session*) const", referenced from:
LFFD::detect(cv::Mat&, std::__1::vector<FaceInfo, std::__1::allocator >&, int, int, float, float, int, std::__1::vector<int, std::__1::allocator >) in MNN_LFFD.cpp.o
"MNN::Tensor::copyToHostTensor(MNN::Tensor*) const", referenced from:
LFFD::detect(cv::Mat&, std::__1::vector<FaceInfo, std::__1::allocator >&, int, int, float, float, int, std::__1::vector<int, std::__1::allocator >) in MNN_LFFD.cpp.o
"MNN::Tensor::getDimensionType() const", referenced from:
MNN::Tensor::width() const in MNN_LFFD.cpp.o
MNN::Tensor::height() const in MNN_LFFD.cpp.o
"MNN::Tensor::shape() const", referenced from:
LFFD::detect(cv::Mat&, std::__1::vector<FaceInfo, std::__1::allocator >&, int, int, float, float, int, std::__1::vector<int, std::__1::allocator >) in MNN_LFFD.cpp.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [test] Error 1
make[1]: *** [CMakeFiles/test.dir/all] Error 2
make: *** [all] Error 2
请问你做了OpenCL或者vulkan后端的测试了吗，能否解答一下疑惑，谢谢