msgctl(2) appeared in SUSv1.[1]  The function was added to POSIX.1-2001
when POSIX and SUS merged, but as an XSI extension (still SUS-only).[2]
And it remains an XSI extension in POSIX.1-2024.[3]

[1] X/Open CAE Specification, System Interfaces and Headers Issue 4,
Version 2, Chapter 3 "System Interfaces", pp. 404-405.
[2] IEEE Std 1003.1-2001, Volume 2, Chapter 3 "System Interfaces", pp.
802-803.
<https://pubs.opengroup.org/onlinepubs/009604499/functions/msgctl.html>
[3] IEEE Std 1003.1-2024, Volume 2, Chapter 3 "System Interfaces", pp.
1471-1472.
<https://pubs.opengroup.org/onlinepubs/9799919799/functions/msgctl.html>

Signed-off-by: Seth McDonald <redacted>
---
 man/man2/msgctl.2 | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/man/man2/msgctl.2 b/man/man2/msgctl.2
index cff83924ab25..b63ed2cc2e93 100644
--- a/man/man2/msgctl.2
+++ b/man/man2/msgctl.2

@@ -378,9 +378,11 @@ .SH ERRORS
 .B CAP_SYS_RESOURCE
 capability).
 .SH STANDARDS
-POSIX.1-2024.
+POSIX.1-2024 XSI.
 .SH HISTORY
-POSIX.1-2001, SVr4.
+SVr4,
+SUSv1,
+POSIX.1-2001 XSI.
 .\" SVID does not document the EIDRM error condition.
 .P
 Various fields in the

-- 
2.47.3