2 dnl Copyright (C) 2011-2020 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_WMEMCHR],
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],
15 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
17 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be included
24 [[return ! wmemchr ((const wchar_t *) 0, (wchar_t) ' ', 0);]])
26 [gl_cv_func_wmemchr=yes],
27 [gl_cv_func_wmemchr=no])
29 if test $gl_cv_func_wmemchr = no; then