https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104208
--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
If you want -mlong-double-64 to override -mabi={ibm,ieee}longdouble, you need
make sure that the last of those options on the command line wins. And what
should -mlong-double-128 do in that scheme?
