OpenCV -仅与g++一起工作.不是gcc或nvcc

我已经安装了OpenCV。我已经能够编译一些代码，但有时它不工作。下面的示例不起作用。

#include <iostream>
#include "opencv2/opencv.hpp"
#include "opencv2/gpu/gpu.hpp"
int main (int argc, char* argv[])
{
    try
    {
        cv::Mat src_host = cv::imread("building.jpg", CV_LOAD_IMAGE_GRAYSCALE);
        cv::gpu::GpuMat dst, src;
        src.upload(src_host);
        cv::gpu::threshold(src, dst, 128.0, 255.0, CV_THRESH_BINARY);
        cv::Mat result_host = dst;
        cv::imshow("Result", result_host);
        cv::waitKey();
    }
    catch(const cv::Exception& ex)
    {
        std::cout << "Error: " << ex.what() << std::endl;
    }
    return 0;
}

gcc Test.cpp $(pkg-config——cflags——libs opencv)

gcc Test.cpp $(pkg-config --cflags --libs opencv)
Undefined symbols for architecture x86_64:
"std::allocator<char>::allocator()", referenced from:
  _main in ccnzUIww.o
"std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(char const*, std::allocator<char> const&)", referenced from:
  _main in ccnzUIww.o
"std::basic_string<char, std::char_traits<char>, std::allocator<char> >::~basic_string()", referenced from:
  _main in ccnzUIww.o
"std::terminate()", referenced from:
  _main in ccnzUIww.o
"std::allocator<char>::~allocator()", referenced from:
  _main in ccnzUIww.o
"cv::gpu::GpuMat::upload(cv::Mat const&)", referenced from:
  _main in ccnzUIww.o
"cv::gpu::Stream::Null()", referenced from:
  _main in ccnzUIww.o
"cv::gpu::threshold(cv::gpu::GpuMat const&, cv::gpu::GpuMat&, double, double, int, cv::gpu::Stream&)", referenced from:
  _main in ccnzUIww.o
"cv::gpu::GpuMat::operator cv::Mat() const", referenced from:
  _main in ccnzUIww.o
"___cxa_begin_catch", referenced from:
  _main in ccnzUIww.o
"std::cout", referenced from:
  _main in ccnzUIww.o
"std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)", referenced from:
  _main in ccnzUIww.o
"std::basic_ostream<char, std::char_traits<char> >& std::endl<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&)", referenced from:
  _main in ccnzUIww.o
"std::basic_ostream<char, std::char_traits<char> >::operator<<(std::basic_ostream<char, std::char_traits<char> >& (*)(std::basic_ostream<char, std::char_traits<char> >&))", referenced from:
  _main in ccnzUIww.o
"___cxa_end_catch", referenced from:
  _main in ccnzUIww.o
"std::ios_base::Init::Init()", referenced from:
  __static_initialization_and_destruction_0(int, int)in ccnzUIww.o
"std::ios_base::Init::~Init()", referenced from:
  ___tcf_0 in ccnzUIww.o
"cv::gpu::GpuMat::release()", referenced from:
  cv::gpu::GpuMat::~GpuMat()in ccnzUIww.o
"___gxx_personality_v0", referenced from:
  Dwarf Exception Unwind Info (__eh_frame) in ccnzUIww.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status

我也试过了:

• gcc Test.cpp $(pkg-config——cflags——libs opencv) -m32
• gcc Test.cpp $(pkg-config——cflags——libs opencv) -m64
• nvcc Test.cpp $(pkg-config——cflags——libs opencv)

但是这也会产生错误。我在stackoverflow上寻找答案，发现了这个。编译OpenCV CUDA程序在这个答案中，解决方案是使用以下命令:

g++ Test.cpp `pkg-config --cflags --libs opencv` -lopencv_gpu

它有效!我试过给gcc和nvcc编译器同样的参数，但后来我又得到错误。这是一个问题，因为我必须使用nvcc编译器，因为我想在CUDA项目中使用OpenCV。

我几乎没有C和c++的经验，所以有可能这是显而易见的:)