https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61728
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> --- Defining the function inline means that cxxabi.h depends on our implementation details, which makes it incompatible with other implementations of the ABI (libc++ uses our cxxabi.h but provides their own definitions of the public interface). Should this be reopened?