https://gcc.gnu.org/bugzilla/show_bug.cgi?id=32187
--- Comment #13 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to jos...@codesourcery.com from comment #12) > You can now use _Complex _Float128. Given that, it's not obvious that > _Complex __float128, with the legacy __float128 type name, should be > supported (although not supporting that means also not supporting _Complex > __ibm128 for powerpc64le; both are built-in typedefs, and no _Float* > keyword can be used for __ibm128). > > _Float128 isn't supported for C++, although there's the argument that > there std::complex<__float128> is the thing support should be added / > enabled for, rather than adding to the support for C-style complex types > in C++. C++'s _Float128 support was added with r13-2887-b04208895fed34 .