-# Copyright (C) 1991,1992,1996-2000,2003,2004,2012
-# Free Software Foundation, Inc.
+# Copyright (C) 1991-2012 Free Software Foundation, Inc.
# This file is part of the GNU C Library.
# The GNU C Library is free software; you can redistribute it and/or
CFLAGS-getgrent_r.c = -fexceptions
CFLAGS-getgrent.c = -fexceptions
CFLAGS-fgetgrent.c = -fexceptions
-CFLAGS-fgetgrent_r.c = -fexceptions -D_IO_MTSAFE_IO
-CFLAGS-putgrent.c = -fexceptions -D_IO_MTSAFE_IO
+CFLAGS-fgetgrent_r.c = -fexceptions $(libio-mtsafe)
+CFLAGS-putgrent.c = -fexceptions $(libio-mtsafe)
CFLAGS-initgroups.c = -DUSE_NSCD=1 -fexceptions
CFLAGS-getgrgid.c = -fexceptions