--- a/make/lib/Lib-jdk.pack.gmk	Thu Feb 08 10:54:01 2018 -0800
+++ b/make/lib/Lib-jdk.pack.gmk	Thu Feb 08 12:01:32 2018 -0800
@@ -40,6 +40,7 @@
         -I$(TOPDIR)/src/jdk.pack/share/native/common-unpack \
         $(LIBJAVA_HEADER_FLAGS), \
     CFLAGS_release := -DPRODUCT, \
+    DISABLED_WARNINGS_gcc := implicit-fallthrough, \
     MAPFILE := $(TOPDIR)/make/mapfiles/libunpack/mapfile-vers, \
     LDFLAGS := $(LDFLAGS_JDKLIB) $(LDFLAGS_CXX_JDK) \
         $(call SET_SHARED_LIBRARY_ORIGIN), \