http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53383
--- Comment #14 from H.J. Lu <hjl.tools at gmail dot com> 2012-05-20 14:28:18 UTC --- (In reply to comment #12) > > Not when you call function with -fpreferred-stack-boundary=3 > and it is itself compiled with -fpreferred-stack-boudnary=4 > and calls another functions passing __int128. > Thus the ABI incompatibility. When everything is compiled with -fpreferred-stack-boundary=3, it works fine.