[Bug sanitizer/63939] [5 Regression] Massive asan failures (356) on darwin

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63939

--- Comment #12 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> > RUNTESTFLAGS="asan.exp") down from 60 to 36. (I will investigate the
> > remaining failures separately.)
>
> your count is much smaller than Dominique's is that after applying some other patch?

My count was a lazy one: #FAIL when running gcc/g++ (156/200) tests with
-m32/-m64.

>  - testcases that need adjusting (patch submitted there:
> https://gcc.gnu.org/ml/gcc-patches/2014-11/msg02465.html)

This does not work for me: see the output in comment 1.
I guess it requires llvm-symbolizer in PATH. Where can I find it?