[Bug bootstrap/81864] building gcc 8 with --enable-gather-detailed-mem-stats fails on x86-64, arm and aarch64 under gnu linux

[andrewm.roberts at sky dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81864

--- Comment #7 from Andrew Roberts <andrewm.roberts at sky dot com> ---
Works for me on x86-64, trying aarch64 now.