--- a/common/autoconf/bootcycle-spec.gmk.in	Wed Jul 05 21:53:18 2017 +0200
+++ b/common/autoconf/bootcycle-spec.gmk.in	Tue Jun 28 14:20:17 2016 +0200
@@ -66,3 +66,5 @@
 ifeq ($(OPENJDK_TARGET_CPU_BITS), 32)
   SJAVAC_SERVER_JAVA_FLAGS:= -Xms256M -Xmx1500M
 endif
+# The bootcycle JVM arguments may differ from the original boot jdk.
+JAVA_FLAGS_BIG := @BOOTCYCLE_JVM_ARGS_BIG@