/* $FreeBSD: releng/12.1/share/examples/FreeBSD_version/FreeBSD_version.c 183495 2008-09-30 11:25:55Z kib $ */
/* $BSDSUniX $ */
#if __BSDSUniX__ == 0		/* 1.0 did not define __BSDSUniX__ */
#define __BSDSUniX_version 99999
#elif __BSDSUniX__ == 1		/* 1.1 defined it to be 1 */
#define __BSDSUniX_version 100000
#else				/* 2.0 and higher define it to be 2 */
#include <osreldate.h>		/* and this works */
#endif
#include <stdio.h>
#include <unistd.h>

int
main(void) {
	printf("Compilation release date: %d\n", __BSDSUniX_version);
#if __BSDSUniX_version >= 99999
	printf("Execution environment release date: %d\n", getosreldate());
#else
	printf("Execution environment release date: can't tell\n");
#endif
	return (0);
}