1dnl * 2dnl * Copyright (c) 2001 Motoyuki Kasahara 3dnl * 4dnl * Redistribution and use in source and binary forms, with or without 5dnl * modification, are permitted provided that the following conditions 6dnl * are met: 7dnl * 1. Redistributions of source code must retain the above copyright 8dnl * notice, this list of conditions and the following disclaimer. 9dnl * 2. Redistributions in binary form must reproduce the above copyright 10dnl * notice, this list of conditions and the following disclaimer in the 11dnl * documentation and/or other materials provided with the distribution. 12dnl * 3. Neither the name of the project nor the names of its contributors 13dnl * may be used to endorse or promote products derived from this software 14dnl * without specific prior written permission. 15dnl * 16dnl * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 17dnl * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18dnl * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19dnl * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORSBE 20dnl * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21dnl * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22dnl * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23dnl * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24dnl * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25dnl * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 26dnl * THE POSSIBILITY OF SUCH DAMAGE. 27dnl * 28 29dnl * 30dnl * Check for h_errno. 31dnl * 32AC_DEFUN([AC_DECL_H_ERRNO], 33[AC_CACHE_CHECK(for h_errno declaration in netdb.h, ac_cv_decl_h_errno, 34[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ 35#include <netdb.h>]], [[ 36h_errno = 0; 37]])],[ac_cv_decl_h_errno=yes],[ac_cv_decl_h_errno=no])]) 38if test "$ac_cv_decl_h_errno" = yes; then 39 AC_DEFINE(H_ERRNO_DECLARED, 1, 40[Define to 1 if `h_errno' is declared by <netdb.h>]) 41fi]) 42