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
In virtiofsd, we assume that the presence of the STATX_MNT_ID macro implies existence of the statx.stx_mnt_id field. Unfortunately, that is not necessarily the case: glibc has introduced the macro in its commit 88a2cf6c4bab6e94a65e9c0db8813709372e9180, but the statx.stx_mnt_id field is still missing from its own headers. Let meson.build actually chek for both STATX_MNT_ID and statx.stx_mnt_id, and set CONFIG_STATX_MNT_ID if both are present. Then, use this config macro in virtiofsd. Closes: https://gitlab.com/qemu-project/qemu/-/issues/882 Signed-off-by: Hanna Reitz <hreitz@redhat.com> Message-Id: <20220223092340.9043-1-hreitz@redhat.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>