Use the linker option to control which symbols are exported for Mach-O builds (only export NSGetModule from component libraries). Bug 187732, r=cls.

build/unix/gnu-ld-scripts/components-export-list

@@ -0,0 +1 @@
+_NSGetModule

configure.in

@@ -1473,6 +1473,9 @@ case "$target" in
     *-nto*) 
         MOZ_COMPONENTS_VERSION_SCRIPT_LDFLAGS='-Wl,--version-script,$(BUILD_TOOLS)/gnu-ld-scripts/components-version-script'
         ;;
+    *-darwin*)
+        MOZ_COMPONENTS_VERSION_SCRIPT_LDFLAGS='-Wl,-exported_symbols_list -Wl,$(BUILD_TOOLS)/gnu-ld-scripts/components-export-list'
+        ;;
 esac
 
 if test -z "$SKIP_COMPILER_CHECKS"; then

xpcom/build/Makefile.in

@@ -33,6 +33,7 @@ ifdef _BUILD_BUNDLE
 IS_COMPONENT	= 1
 DLL_SUFFIX	= .bundle
 NO_DIST_INSTALL	= 1
+MOZ_COMPONENTS_VERSION_SCRIPT_LDFLAGS=
 endif
 
 # Do not set EXPORT_LIBRARY as we do not want xpcom in the static libs list