--- old/make/launcher/Launcher-jdk.pack.gmk	2018-02-07 23:28:58.686191458 +0100
+++ new/make/launcher/Launcher-jdk.pack.gmk	2018-02-07 23:28:58.394181218 +0100
@@ -82,7 +82,7 @@
     CFLAGS_linux := -fPIC, \
     CFLAGS_solaris := -KPIC, \
     CFLAGS_macosx := -fPIC, \
-    DISABLED_WARNINGS_gcc := unused-result, \
+    DISABLED_WARNINGS_gcc := unused-result implicit-fallthrough, \
     MAPFILE := $(UNPACK_MAPFILE),\
     LDFLAGS := $(UNPACKEXE_ZIPOBJS) \
         $(LDFLAGS_JDKEXE) $(LDFLAGS_CXX_JDK) \