[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 #20 from Ulrich Drepper <drepper.fsp at gmail dot com> 2012-09-04 01:06:33 UTC ---
Created attachment 28127
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28127
Check for rdrand availability

How about this patch?  Not sure whether this handles cross-compiling.  It seems
to work for me.

I still think it's wrong to bother with obsolete assemblers...