#serial 9 dnl Copyright (C) 2002, 2005-2006, 2009-2024 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. AC_DEFUN([gl_UNISTD_SAFER], [ AC_CHECK_FUNCS_ONCE([pipe]) ])