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

[drepper.fsp at gmail dot com]

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

--- Comment #36 from Ulrich Drepper <drepper.fsp at gmail dot com> 2012-09-05 13:25:21 UTC ---
(In reply to comment #35)
> What will happen if the assembly accept rdrand, but not the CPU?

The code at runtime checks for the feature bit.  There will be no problem. 
This is *exclusively* a problem with obsolete assemblers.