?RCS:
?RCS: Copyright (c) 2013 Raphael Manfredi
?RCS: 
?RCS: You may redistribute only under the terms of the Artistic License,
?RCS: as specified in the README file that comes with the distribution.
?RCS: You may reuse parts of this distribution only within the terms of
?RCS: that same Artistic License; a copy of which may be found at the root
?RCS: of the source tree for dist 4.0.
?RCS:
?MAKE:d_fsync: Trylink cat i_unistd
?MAKE:	-pick add $@ %<
?S:d_fsync:
?S:	This variable conditionally defines the HAS_FSYNC symbol, which
?S:	indicates to the C program that the fsync() routine is available
?S:	to synchronize a file's in-core state with the storage device.
?S:.
?C:HAS_FSYNC:
?C:	This symbol, if defined, indicates that the fsync routine is available
?C:	to synchronize a file's in-core state with the storage device.
?C:.
?H:#$d_fsync HAS_FSYNC		/**/
?H:.
?LINT:set d_fsync
: see if fsync exists
$cat >try.c <<EOC
#include <sys/types.h>
#$i_unistd I_UNISTD
#ifdef I_UNISTD
#include <unistd.h>
#endif
int main(void)
{
	static int ret, fd;
	ret |= fsync(fd);
	return ret ? 0 : 1;
}
EOC
cyn=fsync
set d_fsync
eval $trylink