[Bug target/81797] gcc 7.1.0 fails to build on macOS 10.13 (High Sierra):

[howarth.at.gcc at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81797

--- Comment #16 from Jack Howarth <howarth.at.gcc at gmail dot com> ---
The component on this bug should probably be switched back off of 'target' to
'libstdc++' as the broken stamps implementation is likely just latent on other
targets because none of them have filesystems with the fine time granularity of
APFS yet,