http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47859
--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> 2011-02-23 21:22:34 UTC --- Are you building of NFS also? "make[4]: warning: Clock skew detected. Your build may be incomplete." Usually means your clock and the server clock don't match up correctly. And the IO error could possibly be a network issue.
