cmsg.3: CONFORMING TO: note which CMSG_* APIs are in current and upcoming POSIX

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

diff --git a/man3/cmsg.3 b/man3/cmsg.3
index 91d9759870e62635ae9b743d44b6daba6e395822..d1209d95a63162302c28edcf9ee8f15954bf82ab 100644 (file)
--- a/man3/cmsg.3
+++ b/man3/cmsg.3
@@ -159,6 +159,17 @@ see
 .SH CONFORMING TO
 This ancillary data model conforms to the POSIX.1g draft, 4.4BSD-Lite,
 the IPv6 advanced API described in RFC\ 2292 and SUSv2.
+.BR CMSG_FIRSTHDR (),
+.BR CMSG_NXTHDR (),
+and
+.BR CMSG_DATA ()
+are specified in POSIX.1-2008.
+.BR CMSG_SPACE ()
+and
+.BR CMSG_LEN ()
+.\" https://www.austingroupbugs.net/view.php?id=978#c3242
+will be included in the next POSIX release (Issue 8).
+.PP
 .BR CMSG_ALIGN ()
 is a Linux extension.
 .SH NOTES