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How to make use of OpenCV source codes instead of its shared libraries

I have a project at hand which I want to use one of the opencv modules (specifically dnn). Instead of building the dnn module I want to use the source code of this modules in my project. by doing so, I can change the source code live and see the results at the same time.

I have a very simple scenario with one only source file:

main.cpp

#include "iostream"
#include <opencv2/dnn.hpp>

int main(int argc, char *argv[])
{
    std::string ConfigFile = "tsproto.pbtxt";
    std::string ModelFile = "tsmodel.pb";

    cv::dnn::Net net = cv::dnn::readNetFromTensorflow(ModelFile,ConfigFile);


    return 0;
}

now this function "cv::dnn::readNetFromTensorflow" is in dnn module. I tried many different methods to embedded the dnn source codes inside my project but all of them failed !

for example, the first time I tried to include every cpp and hpp file in the module/dnn/ folder of opencv in my project but I ended up in errors like

/home/user/projects/Tensor/tf_importer.cpp:28: error: 'CV__DNN_EXPERIMENTAL_NS_BEGIN' does not name a type

#include "../precomp.hpp" no such file or directory

HAVE_PROTOBUF is undefined 

and ....

I tried to solve these errors but some more errors just happened, more undefined MACROs and more undefined hpp files !

#include "../layers_common.simd.hpp" no such file or directory
and many many more errors !

It seems that I'm stuck in a while(true) loop of errors !!! Is it really that hard to use opencv modules source code ?

P.S. For those who are asking about why I want to use opencv source code instead of using the shared libraries I have to say that I want to import a customized tensorflow model which opencv read function doesn't support and I want to know where exactly it crashesh so I can fix it.

By the way, I am only using c++11 functions and gcc as compiler in Ubuntu 16.04