[Bug sanitizer/61021] [4.9/5 regression] libsanitizer fails to build with old glibc

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61021

--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Thus we should have this already in GCC trunk.  Does it still fail to build
there?