2 dnl Copyright (C) 2020 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
7 AC_DEFUN([gl_FUNC_WMEMPCPY],
9 AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
11 dnl Persuade glibc <wchar.h> to declare wmempcpy().
12 AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
14 dnl The wmempcpy() declaration in lib/wchar.in.h uses 'restrict'.
15 AC_REQUIRE([AC_C_RESTRICT])
17 AC_CHECK_FUNCS_ONCE([wmempcpy])
18 if test $ac_cv_func_wmempcpy = no; then