/* Test of <sys/select.h> substitute.

   Copyright (C) 2007-2019 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 3 of the License, or

   (at your option) any later version.

   This program is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */

/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */

#include <config.h>

#include <sys/select.h>

#include "signature.h"

/* The following may be macros without underlying functions, so only

   check signature if they are not macros.  */

#ifndef FD_CLR

SIGNATURE_CHECK (FD_CLR, void, (int, fd_set *));

#endif

#ifndef FD_ISSET

SIGNATURE_CHECK (FD_ISSET, void, (int, fd_set *));

#endif

#ifndef FD_SET

SIGNATURE_CHECK (FD_SET, int, (int, fd_set *));

#endif

#ifndef FD_ZERO

SIGNATURE_CHECK (FD_ZERO, void, (fd_set *));

#endif

/* Check that the 'struct timeval' type is defined.  */

struct timeval a;

/* Check that a.tv_sec is wide enough to hold a time_t, ignoring

   signedness issues.  */

typedef int verify_tv_sec_type[sizeof (time_t) <= sizeof (a.tv_sec) ? 1 : -1];

/* Check that sigset_t is defined.  */

sigset_t t2;

int

main (void)

{

  /* Check that FD_ZERO can be used.  This should not yield a warning

     such as "warning: implicit declaration of function 'memset'".  */

  fd_set fds;

  FD_ZERO (&fds);

  return 0;

}