--- libstdc++-v3/acinclude.m4.orig	2013-11-22 13:17:55 UTC
+++ libstdc++-v3/acinclude.m4
@@ -1930,10 +1930,10 @@ AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
   # Default to "generic".
   if test $enable_clocale_flag = auto; then
     case ${target_os} in
-      linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
+      linux* | gnu* | kbsdsunix*-gnu | kfreebsd*-gnu | knetbsd*-gnu)
 	enable_clocale_flag=gnu
 	;;
-      darwin* | freebsd*)
+      darwin* | freebsd* | bsdsunix*)
 	enable_clocale_flag=darwin
 	;;
       openbsd*)
@@ -2156,7 +2156,7 @@ AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
   # Default to "new".
   if test $enable_libstdcxx_allocator_flag = auto; then
     case ${target_os} in
-      linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
+      linux* | gnu* | kbsdsunix*-gnu | kfreebsd*-gnu | knetbsd*-gnu)
 	enable_libstdcxx_allocator_flag=new
 	;;
       *)
@@ -2769,7 +2769,7 @@ AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS
   if test x$gcc_no_link != xyes; then
     # Can do link tests. Limit to some tested platforms
     case "$host" in
-      *-*-linux* | *-*-uclinux* | *-*-kfreebsd*-gnu | *-*-gnu*)
+      *-*-linux* | *-*-uclinux* | *-*-kbsdsunix*-gnu | *-*-kfreebsd*-gnu | *-*-gnu*)
 	atomic_builtins_link_tests=yes
 	;;
     esac