[Bug sanitizer/79341] Many Asan tests fail on s390

[krebbel at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79341

--- Comment #19 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
koriakin stands for Marcin Kościelnicki who implemented LLVM sanitizer support
for z as part of a bounty. Ulrich Weigand led the discussions with him. CC'ing
Uli.

My personal opinion is that support of older Glibcs is not important in that
case. All relevant distros for z already have a Glibc with that symbol and asan
is new feature.

As a debugging tool I think asan is a special case also regarding ABI
compatibility. We probably do not want to export the internal symbol and make
it part of the ABI because of a single user. I think adding a comment to Glibc
code making people aware that this needs to be kept in sync with libsanitizer
would be sufficient.