http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55641
--- Comment #1 from David Blaikie <dblaikie at gmail dot com> 2012-12-10 16:29:47 UTC --- Oh, and, tellingly, GCC (7.5) emits a DW_TAG_const_type in the DWARF data that Clang does not emit, which seems to be the relevant difference here.