https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84751
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> --- (In reply to Will Schmidt from comment #3) > $ /home/willschm/gcc/trunk.svn/configure --with-cpu=power7 > --with-long-double-128 --prefix=/home/willschm/gcc/install/gnc > --disable-bootstrap --enable-languages=c,c++,lto --no-create --no-recursion If it is --disable-bootstrap, then it matters what exact your system gcc is, perhaps it miscompiles something?