https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87189
--- Comment #9 from Paul Pluzhnikov <ppluzhnikov at google dot com> --- Thanks, H.J. https://sourceware.org/bugzilla/show_bug.cgi?id=5784 has a few references, and in particular https://sourceware.org/ml/libc-alpha/2012-09/msg00192.html is important to consider.