Second try for bug 187732. Post-process component libraries on OS X using nmedit to control which symbols are exported. r=cls.

config/rules.mk

@@ -988,6 +988,11 @@ ifdef RESFILE
 endif
 endif # OS2
 	chmod +x $@
+ifndef NO_COMPONENT_LINK_MAP
+ifeq ($(OS_ARCH)_$(IS_COMPONENT),Darwin_1)
+	nmedit -s $(BUILD_TOOLS)/gnu-ld-scripts/components-export-list $@
+endif
+endif
 ifdef ENABLE_STRIP
 	$(STRIP) $@
 endif

xpcom/build/Makefile.in

@@ -33,7 +33,7 @@ ifdef _BUILD_BUNDLE
 IS_COMPONENT	= 1
 DLL_SUFFIX	= .bundle
 NO_DIST_INSTALL	= 1
-MOZ_COMPONENTS_VERSION_SCRIPT_LDFLAGS=
+NO_COMPONENT_LINK_MAP = 1
 endif
 
 # Do not set EXPORT_LIBRARY as we do not want xpcom in the static libs list