Index: configure
===================================================================
--- a/configure	(revision 45449)
+++ a/configure	(revision 45450)
@@ -416,7 +416,7 @@
       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
Index: Config.kmk
===================================================================
--- a/Config.kmk	(revision 45449)
+++ a/Config.kmk	(revision 45450)
@@ -1503,7 +1503,7 @@
 #
 # Compiler optimization flags.
 #
-VBOX_GCC_WARN     ?= -Wall $(VBOX_GCC_Wextra) $(VBOX_GCC_Wno-missing-field-initializers) -Wno-unused -Wno-trigraphs $(VBOX_GCC_fdiagnostics-show-option)
+VBOX_GCC_WARN     ?= -Wall $(VBOX_GCC_Wextra) $(VBOX_GCC_Wno-missing-field-initializers) -Wno-unused -Wno-trigraphs $(VBOX_GCC_fdiagnostics-show-option) $(VBOX_GCC_no-unused-parameter)
 VBOX_GCC_WARN_PEDANTIC = -Wshadow $(VBOX_GCC_WARN) -Wno-long-long
 ifdef VBOX_WITH_MASOCHISTIC_WARNINGS
  VBOX_GCC_WARN_PEDANTIC += -Wunused-variable -Wunused-function -Wunused-label -Wunused-parameter
@@ -2285,6 +2285,12 @@
 	$(QUIET)$(APPEND) '$@' ' endif'
 	$(QUIET)$(APPEND) '$@' 'endif'
 endif
+# Prevent warnings about unused parameters as of gcc-4.8 as this warning is now very verbose
+	$(QUIET)$(APPEND) '$@' 'ifneq ($$(VBOX_GCC_VERSION_CXX),)'
+	$(QUIET)$(APPEND) '$@' ' ifneq ($$(int-ge $$(VBOX_GCC_VERSION_CXX),40800),)'
+	$(QUIET)$(APPEND) '$@' '  VBOX_GCC_no-unused-parameter ?= -Wno-unused-parameter'
+	$(QUIET)$(APPEND) '$@' ' endif'
+	$(QUIET)$(APPEND) '$@' 'endif'
 ifeq ($(KBUILD_TARGET),solaris)
 	$(QUIET)$(APPEND) '$@' 'VBOX_GCC_msave-args            ?= $(call VBOX_GCC_CHECK_CXX,-msave-args,)'
 # Detect the solaris assembler. It is used by the the 4.x gcc compilers,