https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127690
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> --- I was planning to deprecate it all then rip it out she create a standalone repo for it. But making installation opt-in is a great idea. That allows distros to drop it asap. It's all header only and not part of the ABI.
