https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55004 Bug 55004 depends on bug 86607, which changed state.
Bug 86607 Summary: constexpr function does not treat function pointers with external linkage as constexpr https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86607 What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |DUPLICATE
