Thank you for the interest in GlobalModulesIndex project at HSF group! As this project is highly technical, it is necessary to have some understanding of ROOT and Clang before starting to write proposal. This document is dedicated to give a surface introduction of C++ modules, and to give a project which you can try out.
Build ROOT with C++ Modules
git clone https://github.com/root-project/root mkdir root-build cd root-build cmake ../root -Druntime_cxxmodules=On -Droot7=Off (-GNinja) make (or ninja)
After building ROOT, you will notice that modulemap is created under
include/libc.modulemap. modulemaps serve as a definition file of explicit C++ modules, to define which header file should be included in which module.
Please try to add stl or libc system header to
build/unix/libc.modulemap and compile ROOT again. If you succeed in adding one header file to either modulemaps, please let us know.