Re: sparc64 vs. gcc 4.8

Is it possible to mix (link) gcc 4.5 *.o files and gcc 4.8 *.o files?
If so, you can bisect offending code.  Luckily most of syncronization
operations are not inlined.

There are also some unrolled locking codes which directly use
membar(9); e.g. file descriptor code, which is IMO highly suspicious.