1# wmemchr.m4 serial 5
2dnl Copyright (C) 2011-2021 Free Software Foundation, Inc.
3dnl This file is free software; the Free Software Foundation
4dnl gives unlimited permission to copy and/or distribute it,
5dnl with or without modifications, as long as this notice is preserved.
6
7AC_DEFUN([gl_FUNC_WMEMCHR],
8[
9  AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
10  dnl We cannot use AC_CHECK_FUNCS here, because the MSVC 9 header files
11  dnl provide this function as an inline function definition.
12  AC_CACHE_CHECK([for wmemchr], [gl_cv_func_wmemchr],
13    [AC_LINK_IFELSE(
14       [AC_LANG_PROGRAM(
15          [[#include <wchar.h>
16          ]],
17          [[return ! wmemchr ((const wchar_t *) 0, (wchar_t) ' ', 0);]])
18       ],
19       [gl_cv_func_wmemchr=yes],
20       [gl_cv_func_wmemchr=no])
21    ])
22  if test $gl_cv_func_wmemchr = no; then
23    HAVE_WMEMCHR=0
24  fi
25])
26