--- VirtualBox-4.2.12/src/VBox/Additions/linux/lightdm-greeter/Makefile.kmk~	2013-06-01 11:13:40.000000000 +0300
+++ VirtualBox-4.2.12/src/VBox/Additions/linux/lightdm-greeter/Makefile.kmk	2013-06-02 11:08:48.853803103 +0300
@@ -82,4 +82,7 @@
  endif
 endif
 
+# as vbox build links this with gcc not g++, add -lsupc++
+vbox-greeter_LIBS += supc++
+
 include $(FILE_KBUILD_SUB_FOOTER)