http://www.freebsd.org/doc/en/books/porters-handbook/porting-versions.html
#include <stdio.h>
#include <limits.h>
-#if defined(__FreeBSD__)
-/* Needed to check FreeBSD version */
+#if defined(__FreeBSD__) && (__FreeBSD__ >= 2)
+/* Needed for __FreeBSD_version symbol definition */
#include <osreldate.h>
#endif
require it! */
#if defined(_AIX) || defined(__NOVELL_LIBC__) || defined(__NetBSD__) || \
defined(__minix) || defined(__SYMBIAN32__) || defined(__INTEGRITY) || \
- defined(ANDROID) || (defined(__FreeBSD__) && __FreeBSD_version < 800000)
+ defined(ANDROID) || \
+ (defined(__FreeBSD_version) && (__FreeBSD_version < 800000))
#include <sys/select.h>
#endif