--- old/make/lib/Lib-java.prefs.gmk	2018-03-28 12:27:20.654049239 +0200
+++ new/make/lib/Lib-java.prefs.gmk	2018-03-28 12:27:20.422049241 +0200
@@ -39,7 +39,6 @@
     OPTIMIZATION := HIGH, \
     CFLAGS := $(CFLAGS_JDKLIB) $(addprefix -I, $(LIBPREF_SRC_DIRS)) \
         $(LIBJAVA_HEADER_FLAGS), \
-    MAPFILE := $(TOPDIR)/make/mapfiles/libprefs/mapfile-vers, \
     LDFLAGS := $(LDFLAGS_JDKLIB) \
         $(call SET_SHARED_LIBRARY_ORIGIN), \
     LIBS_unix := -ljvm, \