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mirror_zfs/config
Rob Norris 97949da709 config: fix STATX_MNT_ID detection
statx(2) requires _GNU_SOURCE to be defined in order for sys/stat.h to
produce a definition for struct statx and the STATX_* defines. We get
that at compile time because we pass -D_GNU_SOURCE through to
everything, but in the configure check we aren't setting _GNU_SOURCE, so
we don't find STATX_MNT_ID, and so don't set HAVE_STATX_MNT_ID.

(This was fine before ccf5a8a6fc, because linux/stat.h does not require
_GNU_SOURCE).

Simple fix: in the check, define _GNU_SOURCE before including
sys/stat.h.

Sponsored-by: TrueNAS
Reviewed-by: Ameer Hamza <ahamza@ixsystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rob Norris <rob.norris@truenas.com>
Closes #18312
2026-04-23 14:56:54 -07:00
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