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

[glisse at gcc dot gnu.org]

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

--- Comment #17 from Marc Glisse <glisse at gcc dot gnu.org> 2012-09-03 09:43:13 UTC ---
(In reply to comment #16)
> So, I think this is something that should be tested for in libstdc++-v3
> configure and enabled in the headers only if _GLIBCXX_HAVE_* macro is defined.

One issue here is that this affects the list of symbols exported from the
library. Maybe moving __x86_rdrand back to an inline function in the headers
would make using _GLIBCXX_HAVE_* more acceptable?