https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99995
--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Jonathan Wakely from comment #9) > (In reply to Jonathan Wakely from comment #0) > > In C++20 mode <memory> includes <bits/atomic_wait.h> which includes > > <unistd.h> for SYS_futex, > > We should use <sys/syscall.h> for that instead, which would improve things > somewhat. That doesn't help because we still need unistd.h for the actual syscall(long,...) declaration. sys/syscall.h only declares the syscall numbers like SYS_futex.
