Index: configure.ac
===================================================================
--- configure.ac	(revision 171047)
+++ configure.ac	(working copy)
@@ -1743,7 +1743,7 @@ ACX_ELF_TARGET_IFELSE([# ELF platforms b
   build_lto_plugin=yes
 ],[if test x"$default_enable_lto" = x"yes" ; then
     case $target in
-      *-cygwin* | *-mingw*) ;;
+      *-apple-darwin9 | *-cygwin* | *-mingw*) ;;
       # On other non-ELF platforms, LTO has yet to be validated.
       *) enable_lto=no ;;
     esac