From bb925469870874289aa88a2ef03d98a79b91dbdf Mon Sep 17 00:00:00 2001
From: Sebastian Huber <sebastian.huber@embedded-brains.de>
Date: Mon, 23 May 2022 16:09:29 +0200
Subject: [PATCH] libbsd.txt: Move system control hints

Generalize hint.
---
 CONTRIBUTING.rst | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
index 316a851a..796eafc9 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -669,3 +669,10 @@ Here you see that the SYSINIT(9) entries are no longer static.  The
 ``*_REFERENCE()`` macros will create references to the corresponding modules
 which are later resolved by the linker.  The application has to provide an
 object file with references to all required FreeBSD modules.
+
+System Control Hints
+====================
+
+If you get undefined references to ``_bsd_sysctl_*`` symbols, then you have to
+locate and add the associated system control node, see
+`SYSCTL(9) <http://www.freebsd.org/cgi/man.cgi?query=SYSCTL_DECL&sektion=9>`_.