[Bug libstdc++/118093] std::future::wait_until futex call returns EINVAL for negative timeout smaller than 1s

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118093

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed for GCC 15, but probably worth backporting.