Index: /trunk/Config.kmk
===================================================================
--- /trunk/Config.kmk	(revision 24085)
+++ /trunk/Config.kmk	(revision 24086)
@@ -422,5 +422,5 @@
 # Enable EFI support
 VBOX_WITH_EFI = 1
-# Fetch EFI firmware image from the build server  
+# Fetch EFI firmware image from the build server
 # VBOX_WITH_EFIFW_FROM_BUILD_SERVER = 1
 # Enable SCSI drivers
@@ -1456,5 +1456,6 @@
  TOOL_GXX4MACHO_CC  = gcc$(VBOX_MACOSX_GCC_INFIX)$(HOSTSUFF_EXE)
  TOOL_GXX4MACHO_CXX = g++$(VBOX_MACOSX_GCC_INFIX)$(HOSTSUFF_EXE)
- TOOL_GXX4MACHO_OBJC= gcc$(VBOX_MACOSX_GCC_INFIX)$(HOSTSUFF_EXE) $(if-expr $(KBUILD_TARGET_ARCH) == "x86",-m32,-m64)
+ TOOL_GXX4MACHO_OBJC= gcc$(VBOX_MACOSX_GCC_INFIX)$(HOSTSUFF_EXE) $(if-expr $(KBUILD_TARGET_ARCH) == "x86",-m32,-m64) -fvisibility=hidden
+ TOOL_GXX4MACHO_OBJCXX = gcc$(VBOX_MACOSX_GCC_INFIX)$(HOSTSUFF_EXE) $(if-expr $(KBUILD_TARGET_ARCH) == "x86",-m32,-m64) -fvisibility=hidden -fvisibility-inlines-hidden
  TOOL_GXX4MACHO_AS  = gcc$(VBOX_MACOSX_GCC_INFIX)$(HOSTSUFF_EXE)
  TOOL_GXX4MACHO_LD  = g++$(VBOX_MACOSX_GCC_INFIX)$(HOSTSUFF_EXE)