3usi9

It seems the ```ninja``` build tool is missing which is required for C++ source compilation.

We build data-flow and control-flow graphs of C programs using the [SVF Tools](https://github.com/SVF-tools/SVF) and [ProGraML](https://github.com/ChrisCummins/ProGraML), which are based on LLVM/Clang, the support of Java and other languages is under planning.

Thanks for your interest. We will release the data-flow and control-flow part in the coming months. Currently, we recommend to use the SVF tool (https://github.com/SVF-tools/SVF) to generate these code graphs.

When installing it, before exec setup.py, it's necessary to check a file "xflux" If it doesn't exist (in most cases, even every dependence met), you should exec ```bash python ./download-xflux.py...