Change Details

Regressed by D23696. On FreeBSD < 13 neither memfd_create exists nor posix_fallocate works with file descriptors returned by shm_open(). Given SHM_ANON code wasn't upstreamed just undefine it. No need to check FreeBSD version as SHM_ANON is not used on FreeBSD >= 13.

Regressed by D23696. On FreeBSD < 13 neither `memfd_create` exists nor `posix_fallocate` works with file descriptors returned by `shm_open`. As `SHM_ANON` code wasn't upstreamed and is not used on FreeBSD 13 just disable `posix_fallocate` without version checks.

Regressed by D23696. On FreeBSD < 13 neither `memfd_create` exists nor `posix_fallocate` works with file descriptors returned by shm_open(). Given SHM_ANON code wasn't upstreamed just undefine it`shm_open`. No need to check FreeBSD version as SHM_ANONAs `SHM_ANON` code wasn't upstreamed and is not used on FreeBSD >= 1313 just disable `posix_fallocate` without version checks.