http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55507
--- Comment #1 from Richard Henderson <rth at gcc dot gnu.org> 2012-11-28 18:25:03 UTC --- Created attachment 28821 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28821 preprocessed alpha source Looks like the same problem for alpha, occurring elsewhere in the build. Since this is _powtf2, you probably need --enable-long-double-128 in the configure line when cross-compiling.