-# wcpcpy.m4 serial 1
+# wcpcpy.m4 serial 2
dnl Copyright (C) 2011 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
AC_DEFUN([gl_FUNC_WCPCPY],
[
AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
+
+ dnl Persuade glibc <wchar.h> to declare wcpcpy().
+ AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
AC_CHECK_FUNCS_ONCE([wcpcpy])
if test $ac_cv_func_wcpcpy = no; then
HAVE_WCPCPY=0