https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93731
--- Comment #9 from Iain Sandoe <iains at gcc dot gnu.org> --- one additional point. For earlier OS versions the 'atos' version installed is not sufficient to get sensible output from the sanitizer (characterised by very long timeouts on failed tests). In that case, it is better to install llvm-symbolizer from a recentish LLVM and to set ASAN_SYMBOLIZER_PATH=/path/to/llvm-symbolizer before running tests (FWFW, I tend to do this about 50% of the time even on recent OS versions to ensure that the fails seen are from the sanitiser not atos). atos is closed-source so we can't fix/rebuild it. Unfortunately, the llvm-symbolizer exe is not part of the Xcode distributions, so it has to be built from source. In the case of the x86_64-darwin11 kernel panics, this made no difference to the observed fails.
