--- VirtualBox-4.2.12/configure~	2013-05-25 10:37:20.966442108 +0200
+++ VirtualBox-4.2.12/configure	2013-05-25 10:47:20.825486915 +0200
@@ -414,7 +414,7 @@
       elif [ $cc_maj -lt 3 \
              -o \( $cc_maj -eq 3 -a $cc_min -lt 2 \) \
              -o \( $cc_maj -eq 4 -a $cc_min -lt 1 -a "$OS" != "darwin" \) \
-             -o \( $cc_maj -eq 4 -a $cc_min -gt 7 \) \
+             -o \( $cc_maj -eq 4 -a $cc_min -gt 8 \) \
              -o $cc_maj -gt 4 ]; then
         log_failure "gcc version $cc_ver found, expected gcc 3.x with x>1 or gcc 4.x with 0<x<8"
         fail really
--- VirtualBox-4.2.12/Config.kmk~	2013-05-25 11:56:55.629895894 +0200
+++ VirtualBox-4.2.12/Config.kmk	2013-05-25 14:50:59.850448713 +0200
@@ -2304,7 +2304,7 @@
 #
 ifdef VBOX_WITH_WARNINGS_AS_ERRORS
  if $(VBOX_GCC_VERSION_CXX) >= 40000
-  VBOX_GCC_WERR ?= -Werror
+  VBOX_GCC_WERR ?= -Werror -Wno-error=unused-parameter
  endif
  VBOX_VCC_WERR ?= -WX
  VBOX_VCC_LD_WERR ?= ## @todo later also: -WX