diff -Naur js/src/configure.in js.new/src/configure.in
--- a/js/src/symverscript.in	2012-11-07 09:36:16.000000000 -0500
+++ b/js/src/symverscript.in	2012-11-07 09:37:05.000000000 -0500
@@ -0,0 +1,4 @@
+mozjs185 {
+  global: *;
+};
+
diff -Naur js/src/Makefile.in js.new/src/Makefile.in
--- a/js/src/Makefile.in	2012-11-07 09:36:16.000000000 -0500
+++ b/js/src/Makefile.in	2012-11-07 09:37:09.000000000 -0500
@@ -837,7 +837,10 @@
 	mozjs185.pc \
 	$(NULL)
 
-GARBAGE += $(pkg_config_files)
+symverscript: symverscript.in
+	cat $< > $@
+
+GARBAGE += $(pkg_config_files) symverscript
 
 %.pc: $(srcdir)/%.pc.in Makefile
 	cat $< | sed \
@@ -872,6 +875,8 @@
 SHLIB_ABI_VER   := $(DESTDIR)$(libdir)/$(SHARED_LIBRARY).$(SRCREL_ABI_VERSION)
 SHLIB_EXACT_VER := $(DESTDIR)$(libdir)/$(SHARED_LIBRARY).$(SRCREL_VERSION)
 $(SHARED_LIBRARY): EXTRA_DSO_LDOPTS += -Wl,-soname,$(notdir $(SHLIB_ABI_VER))
+$(SHARED_LIBRARY): EXTRA_DSO_LDOPTS += -Wl,-version-script,symverscript
+$(SHARED_LIBRARY): symverscript
 endif
 endif