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

[howarth at nitro dot med.uc.edu]

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

--- Comment #6 from Jack Howarth <howarth at nitro dot med.uc.edu> 2012-08-31 14:48:47 UTC ---
This same issue was discussed in the following thread...

http://thread.gmane.org/gmane.linux.kernel/1145078

specifically....

Comments/Questions:

* Since RDRAND is relatively new, only the most recent version of
binutils supports assembling it.  To avoid breaking builds for people
who use older toolchains but want this feature, I hardcoded the opcodes.
If anyone has a better approach, please let me know.

It looks like that uncommitted patch hasn't been modified to address this issue
either.