Don't build DHCPv6 by default, except when build Debian package.

debian/rules

@@ -33,6 +33,10 @@ ifeq ($(DEB_BUILD_ARCH_OS),linux)
 endif
 endif
 
+ifeq (,$(filter nodhcp6,$(DEB_BUILD_OPTIONS)))
+     COPTS += -DHAVE_DHCP6
+endif
+
 ifneq (,$(filter noipv6,$(DEB_BUILD_OPTIONS)))
      COPTS += -DNO_IPV6
 endif
@@ -45,10 +49,6 @@ ifneq (,$(filter nodhcp,$(DEB_BUILD_OPTIONS)))
      COPTS += -DNO_DHCP
 endif
 
-ifneq (,$(filter nodhcp6,$(DEB_BUILD_OPTIONS)))
-     COPTS += -DNO_DHCP6
-endif
-
 ifneq (,$(filter noscript,$(DEB_BUILD_OPTIONS)))
      COPTS += -DNO_SCRIPT
 endif

src/config.h

@@ -116,7 +116,7 @@ RESOLVFILE
    has no library dependencies other than libc */
 
 #define HAVE_DHCP
-#define HAVE_DHCP6 
+/* #define HAVE_DHCP6 */ 
 #define HAVE_TFTP
 #define HAVE_SCRIPT
 /* #define HAVE_LUASCRIPT */