The cif-tools suite of programs are tools you can use to examine and manipulate mmCIF and PDB files.
The tools are based on libcif++ and the code is written in modern C++ so you need a compiler capable of handling C++20 code.
Make sure you install libcif++ first before building. You will also need to install libmcfp.
After that, building should be as easy as typing:
git clone https://github.com/PDB-REDO/cif-tools.git
cd cif-tools
cmake -B build
cmake --build build
cmake --install build