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/* Test of <sys/select.h> substitute.
Copyright (C) 2007-2024 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>
/* 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;
#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
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;
}
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