--- old/make/lib/CoreLibraries.gmk	2018-11-19 18:30:41.844412129 -0500
+++ new/make/lib/CoreLibraries.gmk	2018-11-19 18:30:41.680411316 -0500
@@ -102,7 +102,6 @@
     OPTIMIZATION := HIGH, \
     CFLAGS := $(CFLAGS_JDKLIB) \
         $(LIBJAVA_CFLAGS), \
-    System.c_CFLAGS := $(VERSION_CFLAGS), \
     jdk_util.c_CFLAGS := $(VERSION_CFLAGS), \
     EXTRA_HEADER_DIRS := libfdlibm, \
     WARNINGS_AS_ERRORS_xlc := false, \