diff -r d02da43d8b98 -r af61810ccd5b make/lib/CoreLibraries.gmk
--- a/make/lib/CoreLibraries.gmk	Fri Jun 15 14:58:04 2018 +0200
+++ b/make/lib/CoreLibraries.gmk	Wed Aug 29 09:38:20 2018 +0200
@@ -195,7 +195,6 @@
     OPTIMIZATION := LOW, \
     CFLAGS := $(CFLAGS_JDKLIB), \
     CXXFLAGS := $(CXXFLAGS_JDKLIB), \
-    DISABLED_WARNINGS_gcc := implicit-fallthrough, \
     CFLAGS_unix := -UDEBUG, \
     LDFLAGS := $(LDFLAGS_JDKLIB) $(LDFLAGS_CXX_JDK) \
         $(call SET_SHARED_LIBRARY_ORIGIN), \