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