Index: gcc/ada/mlib-tgt-specific-darwin.adb
===================================================================
--- gcc/ada/mlib-tgt-specific-darwin.adb	(revision 178615)
+++ gcc/ada/mlib-tgt-specific-darwin.adb	(working copy)
@@ -57,15 +57,10 @@ package body MLib.Tgt.Specific is
 
    --  Local objects
 
-   Flat_Namespace : aliased String := "-Wl,-flat_namespace";
-   --  Instruct the linker to build the shared library as a flat
-   --  namespace image. The default is a two-level namespace image.
-
    Shared_Libgcc  : aliased String := "-shared-libgcc";
 
    Shared_Options : constant Argument_List :=
-                      (1 => Flat_Namespace'Access,
-                       2 => Shared_Libgcc'Access);
+                      (1 => Shared_Libgcc'Access);
 
    -----------------------------
    -- Archive_Indexer_Options --
Index: gcc/ada/gcc-interface/Makefile.in
===================================================================
--- gcc/ada/gcc-interface/Makefile.in	(revision 178615)
+++ gcc/ada/gcc-interface/Makefile.in	(working copy)
@@ -2164,7 +2164,7 @@ ifeq ($(strip $(filter-out %x86_64 linux%,$(arch)
 endif
 
 ifeq ($(strip $(filter-out darwin%,$(osys))),)
-  SO_OPTS = -Wl,-flat_namespace -shared-libgcc
+  SO_OPTS = -shared-libgcc
   ifeq ($(strip $(filter-out %86,$(arch))),)
     LIBGNAT_TARGET_PAIRS = \
     a-intnam.ads<a-intnam-darwin.ads \