--- old/common/makefiles/IdlCompilation.gmk	2012-07-03 20:04:06.957890205 +0200
+++ new/common/makefiles/IdlCompilation.gmk	2012-07-03 20:04:06.867888876 +0200
@@ -87,6 +87,8 @@
 $(if $7,$1_$(strip $7))
 $(if $8,$1_$(strip $8))
 $(if $9,$1_$(strip $9))
+$(if $(10),$(error Internal makefile error: Too many arguments to SetupIdlCompilation, please update IdlCompilation.gmk))
+
 # Remove any relative addressing in the paths.
 $1_SRC := $$(abspath $$($1_SRC))
 $1_BIN := $$(abspath $$($1_BIN))
@@ -111,4 +113,3 @@
 endef
 
 .SUFFIXES: .java .class .package
-