在OS X上使用imshow时出错 [英] Error when using imshow on OS X

问题描述

我在XCode中设置了 OpenCV2 ，但不幸的是 imshow 无法工作：

I have setup OpenCV2 in XCode but unfortunately imshow does not work:

Undefined symbols for architecture x86_64:
  "cv::imshow(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, cv::_InputArray const&)", referenced from:
      _main in main.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

我使用最新的XCode运行OS X 10.8.4。

I am running OS X 10.8.4 with latest XCode.

我已经在下面添加了几个图像来显示XCode和库中的设置。
到目前为止，其他函数似乎在OpenCV中正常工作，除了这一点。

I have attached a few images below to show the setup in XCode and the libraries. So far it seems that other functions work fine with OpenCV, except this.

推荐答案

我要走出去，说你用 OpenCV2 c $ c> libstdc ++ ，现在正在使用 libc ++ 支持来编译您的应用程序。

I'm going to go out on a limb and say that you compiled OpenCV2 with libstdc++, and are now compiling your application with libc++ support.

您需要使用相同的 C ++ 库来编译OpenCV2，否则将无法链接。

You need to compile OpenCV2 with the same C++ library, otherwise it will not be able to link.

if你做一个 nm 的OpenCV2库，如果它是用 libstdc ++ 编译，它将看起来像：

if you do an nm of the OpenCV2 library, if it was compiled with libstdc++, it will look like:

cv::imshow(std::string const&, cv::_InputArray const&)

，如果编译时使用 libc ++ ，它将如下所示：

while if it was compiled with libc++, it would look like:

cv::imshow(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, cv::_InputArray const&)

得到demangled符号do：

to get the demangled symbol do:

nm library | c++filt | grep cv::imshow

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