--- a/hotspot/make/solaris/makefiles/vm.make	Fri Sep 18 13:41:11 2015 -0700
+++ b/hotspot/make/solaris/makefiles/vm.make	Fri Sep 18 09:48:49 2015 -0700
@@ -241,13 +241,19 @@
 
 vm_version.o: $(filter-out vm_version.o,$(JVM_OBJ_FILES))
 
-mapfile : $(MAPFILE) $(MAPFILE_DTRACE_OPT) vm.def mapfile_ext
+MAPFILE_SHARE  := $(GAMMADIR)/make/share/makefiles/mapfile-vers
+
+MAPFILE_EXT_SRC := $(HS_ALT_MAKE)/share/makefiles/mapfile-ext
+ifneq ("$(wildcard $(MAPFILE_EXT_SRC))","")
+MAPFILE_EXT     := $(MAPFILE_EXT_SRC)
+endif
+
+mapfile : $(MAPFILE) $(MAPFILE_SHARE) vm.def $(MAPFILE_EXT)
 	rm -f $@
 	cat $(MAPFILE) $(MAPFILE_DTRACE_OPT) \
 	    | $(NAWK) '{                                         \
 	              if ($$0 ~ "INSERT VTABLE SYMBOLS HERE") {  \
-	                  system ("cat mapfile_ext");            \
-	                  system ("cat vm.def");                 \
+	                  system ("cat ${MAPFILE_SHARE} $(MAPFILE_EXT) vm.def"); \
 	              } else {                                   \
 	                  print $$0;                             \
 	              }                                          \
@@ -260,12 +266,6 @@
 vm.def: $(Obj_Files)
 	sh $(GAMMADIR)/make/solaris/makefiles/build_vm_def.sh *.o > $@
 
-mapfile_ext:
-	rm -f $@
-	touch $@
-	if [ -f $(HS_ALT_MAKE)/solaris/makefiles/mapfile-ext ]; then \
-	  cat $(HS_ALT_MAKE)/solaris/makefiles/mapfile-ext > $@; \
-	fi
 
 ifeq ($(LINK_INTO),AOUT)
   LIBJVM.o                 =