http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59313
--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> --- (In reply to Uroš Bizjak from comment #2) > Me to, on alpha-linux-gnu, exactly the same numbers: alpha-linux-gnu is 128 bit long double, but not __float128 target: auto-host.h:#define TARGET_DEFAULT_LONG_DOUBLE_128 1 Probably sparc also defines this.