--- a/make/hotspot/lib/CompileJvm.gmk	Tue Mar 12 14:35:26 2019 +0000
+++ b/make/hotspot/lib/CompileJvm.gmk	Tue Mar 12 08:04:33 2019 -0700
@@ -166,6 +166,9 @@
 # default.
 JVM_STRIPFLAGS ?= $(STRIPFLAGS)
 
+# This source set is reused so save in cache.
+$(eval $(call FillCacheFind, $(JVM_SRC_DIRS)))
+
 ################################################################################
 # Now set up the actual compilation of the main hotspot native library