[3870] Added a comment to explain the guard

a2c740a8 · Francis Dupont · 8fb273bb · a2c740a8 · a2c740a8
Commit a2c740a8 authored Jun 23, 2015 by Francis Dupont
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src/bin/dhcp4/dhcp4_srv.h src/bin/dhcp4/dhcp4_srv.h +4 -0

src/bin/dhcp6/dhcp6_srv.h src/bin/dhcp6/dhcp6_srv.h +4 -0

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--- 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

--- 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