X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Funsetenv.c;h=ddbe9a4d2938a08f2488eb214cf80554637ebd8b;hb=72983fb6b5bd6c7de54465eea29464bb9c0276cf;hp=89ce64b6a63e8abc70be9ce631f0e37b5708b8e5;hpb=6948250861edce048d7bb3c6b47d13fa3649905e;p=gnulib.git

diff --git a/lib/unsetenv.c b/lib/unsetenv.c
index 89ce64b6a..ddbe9a4d2 100644
--- a/lib/unsetenv.c
+++ b/lib/unsetenv.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1992,1995-1999,2000-2002,2005-2009 Free Software Foundation, Inc.
+/* Copyright (C) 1992, 1995-2002, 2005-2012 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    This program is free software: you can redistribute it and/or modify
@@ -36,7 +36,7 @@
 #endif
 
 #if _LIBC
-/* This lock protects against simultaneous modifications of `environ'.  */
+/* This lock protects against simultaneous modifications of 'environ'.  */
 # include <bits/libc-lock.h>
 __libc_lock_define_initialized (static, envlock)
 # define LOCK   __libc_lock_lock (envlock)
@@ -97,6 +97,13 @@ weak_alias (__unsetenv, unsetenv)
 #else /* HAVE_UNSETENV */
 
 # undef unsetenv
+# if !HAVE_DECL_UNSETENV
+#  if VOID_UNSETENV
+extern void unsetenv (const char *);
+#  else
+extern int unsetenv (const char *);
+#  endif
+# endif
 
 /* Call the underlying unsetenv, in case there is hidden bookkeeping
    that needs updating beyond just modifying environ.  */