From a2c740a8cafdbb2ba13b2f37cfa25b9582b9ccc8 Mon Sep 17 00:00:00 2001
From: Francis Dupont <fdupont@isc.org>
Date: Tue, 23 Jun 2015 19:42:03 +0200
Subject: [PATCH] [3870] Added a comment to explain the guard

---
 src/bin/dhcp4/dhcp4_srv.h | 4 ++++
 src/bin/dhcp6/dhcp6_srv.h | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/src/bin/dhcp4/dhcp4_srv.h b/src/bin/dhcp4/dhcp4_srv.h
index 835fe65b3f..8683f19a62 100644
--- a/src/bin/dhcp4/dhcp4_srv.h
+++ b/src/bin/dhcp4/dhcp4_srv.h
@@ -33,6 +33,10 @@
 #include <iostream>
 #include <queue>
 
+// Undefine the macro OPTIONAL which is defined in some operating
+// systems but conflicts with a member of the RequirementLevel enum in
+// the server class.
+
 #ifdef OPTIONAL
 #undef OPTIONAL
 #endif
diff --git a/src/bin/dhcp6/dhcp6_srv.h b/src/bin/dhcp6/dhcp6_srv.h
index 7571f2b976..63ad9ae22e 100644
--- a/src/bin/dhcp6/dhcp6_srv.h
+++ b/src/bin/dhcp6/dhcp6_srv.h
@@ -32,6 +32,10 @@
 #include <iostream>
 #include <queue>
 
+// Undefine the macro OPTIONAL which is defined in some operating
+// systems but conflicts with a member of the RequirementLevel enum in
+// the server class.
+
 #ifdef OPTIONAL
 #undef OPTIONAL
 #endif
-- 
2.47.2