http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57920
--- Comment #6 from Frank Heckenbach <f.heckenb...@fh-soft.de> --- (In reply to Paolo Carlini from comment #3) > I'm going to attach a patchlet which does the trick (fread -> read) for me. > Note I'm on purpose disabling the use of __builtin_ia32_rdrand32_step on my > x86_64 machine, the undef would not be in the committed patch of course. > > It would be great if you could test the change on your machines (in 4.7.x > just change random.h, no need to rebuild) and confirm that everything is > fine. I did the equivalent change to /usr/include/c++/4.7/bits/random.h and it works for me, thanks.