https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65664
--- Comment #4 from Gabor Lukacs <lukacs at topgroups dot ca> --- The following patch makes the problem go away insofar as bootstrap is concerned: http://gcc.gnu.org/ml/gcc-patches/2014-05/msg02510.html "This patch to libgo, from Peter Collingbourne, changes some of the C code to make it easier to compile libgo with a compiler other than GCC."