libtrt_cpp_lib.so: undefined reference to `CUDA::MixMemory::cpu(unsigned long)'

[ChenPengf]

在编译链接过程中，会出现以下问题：

/usr/bin/ld: libtrt_cpp_lib.so: undefined reference to `CUDA::MixMemory::cpu(unsigned long)'
/usr/bin/ld: libtrt_cpp_lib.so: undefined reference to `CUDA::decode_single_mask(float, float, float*, float*, int, int, unsigned char*, int, int, int, CUstream_st*)'
/usr/bin/ld: libtrt_cpp_lib.so: undefined reference to `CUDA::MixMemory::gpu(unsigned long)'
/usr/bin/ld: libtrt_cpp_lib.so: undefined reference to `CUDA::MixMemory::MixMemory(int)'
/usr/bin/ld: libtrt_cpp_lib.so: undefined reference to `CUDA::warpAffineBilinearAndNormalizePlaneInvoker(unsigned char*, int, int, int, float*, int, int, float*, unsigned char, CUDA::Norm const&, CUstream_st*)'
/usr/bin/ld: libtrt_cpp_lib.so: undefined reference to `CUDA::Tensor::to_cpu(bool)'
/usr/bin/ld: libtrt_cpp_lib.so: undefined reference to `CUDA::Tensor::Tensor(CUDA::DataType, std::shared_ptr<CUDA::MixMemory>, int)'
/usr/bin/ld: libtrt_cpp_lib.so: undefined reference to `CUDA::decode_kernel_common_invoker(float*, int, int, int, float, float*, float*, int, CUstream_st*)'
/usr/bin/ld: libtrt_cpp_lib.so: undefined reference to `CUDA::Tensor::to_gpu(bool)'
/usr/bin/ld: libtrt_cpp_lib.so: undefined reference to `CUDA::Tensor::offset_array(unsigned long, int const*) const'
/usr/bin/ld: libtrt_cpp_lib.so: undefined reference to `CUDA::nms_kernel_invoker(float*, float, int, CUstream_st*)'
/usr/bin/ld: libtrt_cpp_lib.so: undefined reference to `CUDA::Tensor::~Tensor()'
/usr/bin/ld: libtrt_cpp_lib.so: undefined reference to `CUDATools::check_runtime(cudaError, char const*, int, char const*)'
/usr/bin/ld: libtrt_cpp_lib.so: undefined reference to `CUDA::Norm::None()'
/usr/bin/ld: libtrt_cpp_lib.so: undefined reference to `CUDA::decode_detect_yolov8_kernel_invoker(float*, int, int, int, float, float*, float*, int, CUstream_st*)'
/usr/bin/ld: libtrt_cpp_lib.so: undefined reference to `CUDA::Norm::mean_std(float const*, float const*, float, CUDA::ChannelType)'
/usr/bin/ld: libtrt_cpp_lib.so: undefined reference to `iLogger::__log_func(char const*, int, iLogger::LogLevel, char const*, ...)'
/usr/bin/ld: libtrt_cpp_lib.so: undefined reference to `CUDA::Norm::alpha_beta(float, float, CUDA::ChannelType)'
/usr/bin/ld: libtrt_cpp_lib.so: undefined reference to `CUDA::Tensor::resize(int, int const*)'

然后多次尝试后修改CMakeLists.txt的链接顺序解决了： 将target_link_libraries(test_yolo_detect cpp_lib cuda_lib trt_cpp_lib ${CUDA_LIBS} ${TRT_LIBS} ${local_libs} ) 修改为：target_link_libraries(test_yolo_detect cpp_lib trt_cpp_lib cuda_lib ${CUDA_LIBS} ${TRT_LIBS} ${local_libs} )，改变trt_cpp_lib和cuda_lib的位置就可以编译通过，您那边有遇到这个问题吗，望指教（C++新手提问）。

[1461521844lijin]

当一个库被依赖时，被依赖的库应该放在后面链接 这里trtlib代码中依赖了cudalib的代码，因此正确的链接顺序确实trt_cpp_lib应该在cuda_lib前面，你这个写法才是正确的 不过我本地在链接是确实没有出现这个问题，我猜测是cmake版本原因，没有注意到存在这个问题

[piaolinzhe]

我也遇到同样的问题了，照此修改就解决了