--- a/make/hotspot/lib/CompileGtest.gmk	Sat Mar 03 09:14:01 2018 +0100
+++ b/make/hotspot/lib/CompileGtest.gmk	Mon Mar 05 21:37:20 2018 +0100
@@ -89,7 +89,7 @@
     DISABLED_WARNINGS_solstudio := hidef inlafteruse inllargeint \
         nokeyworddefine notemsource unknownpragma w_enumnotused \
         wnoretvalue w_novirtualdescr w_toomanyenumnotused wvarhidenmem \
-        doubunder, \
+        doubunder wunreachable, \
     DISABLED_WARNINGS_CXX_microsoft := 4996, \
     LDFLAGS := $(JVM_LDFLAGS), \
     LDFLAGS_solaris := -library=stlport4 $(call SET_SHARED_LIBRARY_ORIGIN), \