[PATCH v2] unistd: use __USE_XOPEN2K24 for existing POSIX.1-2024 interfaces

[Joseph Myers]

On Tue, 24 Feb 2026, Collin Funk wrote:

> * conform/data/unistd.h-data: Add checks for the prototypes, although
> conform has not yet been adjusted to support POSIX.1-2024.

I'm not convinced it's coherent to put POSIX24 conditionals in the 
conform/ data without first doing the mechanical preparation that makes it 
a duplicate of POSIX2008 (better: makes POSIX2024 a duplicate of POSIX2008 
and XOPEN2024 a duplicate of XOPEN2K8).  Without such mechanical 
preparation, it's essentially random what the expectations for any new 
standard would look like.

-- 
Joseph S. Myers
josmyers@redhat.com