OpenCV - 找不到“cstdint”文件

Question

I'm using Mac 10.10 and OpenCV 3.0, when I was compiling my project I got this error:

ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

After that, I changed the c++ standard library to libstdc++, another error appeared:

/usr/local/include/opencv2/hal/defs.h:271:14: 'cstdint' file not found

Hope someone could help me

Answer 1

based on the top answer in this question , there are two ways to fix this problem regarding to this fact that you are using of macOs and your default compiler is Clang. You can use:

#include <tr1/cstdint>

or

#include <stdint.h>

instead of cstdint, that is a part of libc++.

Answer 2

I hit this when trying to import a header (.h) that was written for C++ into some Objective C code (.m).

The solution for me was to create a middle-ground Objective C++ file (.mm) and header that that imported the C++ header and then exported c-compatible wrapper functions.

The header had something like this in it to make it play nice with Objective-C (.m) code

#if defined(__cplusplus)
extern "C" {
#endif

const char *MyNewFunction(void); // or whatever

#if defined(__cplusplus)
}
#endif

(Credit to Dave Hylands for helping me figure all of that out.)