--- old/make/lib/Lib-java.base.gmk	2018-03-23 14:23:55.941158180 +0100
+++ new/make/lib/Lib-java.base.gmk	2018-03-23 14:23:55.705158182 +0100
@@ -53,7 +53,6 @@
     DISABLED_WARNINGS_clang := parentheses-equality constant-logical-operand, \
     DISABLED_WARNINGS_microsoft := 4244 4047 4133 4996, \
     DISABLED_WARNINGS_solstudio := E_ARG_INCOMPATIBLE_WITH_ARG_L, \
-    MAPFILE := $(TOPDIR)/make/mapfiles/libnet/mapfile-vers, \
     LDFLAGS := $(LDFLAGS_JDKLIB) \
         $(call SET_SHARED_LIBRARY_ORIGIN), \
     LDFLAGS_windows := -delayload:secur32.dll -delayload:iphlpapi.dll, \
@@ -90,22 +89,6 @@
     $(LIBJAVA_HEADER_FLAGS) \
     $(addprefix -I, $(BUILD_LIBNET_SRC))
 
-ifeq ($(OPENJDK_TARGET_OS), linux)
-  BUILD_LIBNIO_MAPFILE := $(TOPDIR)/make/mapfiles/libnio/mapfile-$(OPENJDK_TARGET_OS)
-endif
-
-ifeq ($(OPENJDK_TARGET_OS), macosx)
-  BUILD_LIBNIO_MAPFILE := $(TOPDIR)/make/mapfiles/libnio/mapfile-$(OPENJDK_TARGET_OS)
-endif
-
-ifeq ($(OPENJDK_TARGET_OS), solaris)
-  BUILD_LIBNIO_MAPFILE := $(TOPDIR)/make/mapfiles/libnio/mapfile-$(OPENJDK_TARGET_OS)
-endif
-
-ifeq ($(OPENJDK_TARGET_OS), aix)
-  BUILD_LIBNIO_MAPFILE := $(TOPDIR)/make/mapfiles/libnio/mapfile-$(OPENJDK_TARGET_OS)
-endif
-
 $(eval $(call SetupJdkLibrary, BUILD_LIBNIO, \
     NAME := nio, \
     SRC := $(BUILD_LIBNIO_SRC), \
@@ -114,7 +97,6 @@
     WARNINGS_AS_ERRORS_xlc := false, \
     CFLAGS := $(CFLAGS_JDKLIB) \
         $(BUILD_LIBNIO_CFLAGS), \
-    MAPFILE := $(BUILD_LIBNIO_MAPFILE), \
     LDFLAGS := $(LDFLAGS_JDKLIB) \
         $(call SET_SHARED_LIBRARY_ORIGIN), \
     LIBS_unix := -ljava -lnet, \