[Bug sanitizer/57316] [4.8/4.9 regression] build failure in libsanitizer

[kcc at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57316

--- Comment #6 from Kostya Serebryany <kcc at gcc dot gnu.org> ---
> Would a fallback implementation of BlockingMutex::{Lock,Unlock}() that uses
> pthread_mutex_*() be sensible here?

That would be non-trivial. We intercept the pthread_ functions so we can't 
call them directly. We'll at least need to bypass our own interceptors. 
And as I mentioned before, older kernels will likely not work anyway for 
a few other reasons.