https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85440
--- Comment #13 from Michael Meissner <meissner at gcc dot gnu.org> --- You can use --with-cpu=power7 as well. But if you only have power8 systems, it is better to use --with-cpu=power8. The little endian PowerPC Linux systems have a minimum cpu base level of power8, so float128 is available on that platform by default.
