Index: /trunk/Config.kmk
===================================================================
--- /trunk/Config.kmk	(revision 74857)
+++ /trunk/Config.kmk	(revision 74858)
@@ -4354,7 +4354,12 @@
 TEMPLATE_VBoxR0_CFLAGS.x86          = -m32
 TEMPLATE_VBoxR0_LDFLAGS             = $(VBOX_DARWIN_DEF_SDK_LDFLAGS) -nostdlib
-#TEMPLATE_VBoxR0_LDFLAGS.release     = -Wl,-S ???
 TEMPLATE_VBoxR0_LDFLAGS.amd64       = -m64 -static
 TEMPLATE_VBoxR0_LDFLAGS.x86         = -m32
+ ifdef VBOX_WITH_SIGNED_R0_ON_MAC
+TEMPLATE_VBoxR0_CXXFLAGS.amd64     += -mkernel
+TEMPLATE_VBoxR0_CFLAGS.amd64       += -mkernel
+TEMPLATE_VBoxR0_LDFLAGS            += -Wl,-kext -mkernel
+TEMPLATE_VBoxR0_POST_CMDS           = $(if $(eq $(tool_do),LINK_LIBRARY),,$(call VBOX_SIGN_VMM_MOD_FN,$(out),org.virtualbox.app.r0.$(target)))
+ endif
 endif