--- old/common/autoconf/spec.gmk.in	2016-05-24 15:19:42.974769328 +0200
+++ new/common/autoconf/spec.gmk.in	2016-05-24 15:19:42.894765945 +0200
@@ -285,6 +285,8 @@
 
 BUILD_FAILURE_HANDLER := @BUILD_FAILURE_HANDLER@
 
+ENABLE_GENERATE_CLASSLIST := @ENABLE_GENERATE_CLASSLIST@
+
 # The boot jdk to use. This is overridden in bootcycle-spec.gmk. Make sure to keep
 # it in sync.
 BOOT_JDK:=@BOOT_JDK@