[Bug bootstrap/54419] [4.8 Regression] Compiling libstdc++-v3/src/c++11/random.cc fails on platforms not knowing rdrand

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54419

--- Comment #63 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-09-09 
20:45:11 UTC ---
(In reply to comment #55)
> AFAICT nobody has been asking to cross post to libstdc++.

Also see comment 40, before the first patch.