See my snapshow below,
this is my C++ project, in my main file `UploadVideo.cp p`, it
`#include "vod_sdk/upload.h"` and in `#include "vod_sdk/upload.h"` it includes many files of `vod_sdk/`.


now when I use g++ compile my project `g++ xxx.cpp -ljsoncpp -o uv`, I get below error ` undefined reference to`.

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Please help me with this.
this is my C++ project, in my main file `UploadVideo.cp p`, it
`#include "vod_sdk/upload.h"` and in `#include "vod_sdk/upload.h"` it includes many files of `vod_sdk/`.


now when I use g++ compile my project `g++ xxx.cpp -ljsoncpp -o uv`, I get below error ` undefined reference to`.

---
Please help me with this.
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