From owner-freebsd-questions  Wed Jan 21 18:24:59 1998
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Date: Wed, 21 Jan 1998 21:24:27 -0500 (EST)
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From: Ted Buswell <tbuswell@mediaone.net>
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To: questions@FreeBSD.ORG
Subject: determine OS version at compile time.
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What's the best way to determine the version of the operating system
that a given file is being compiled for?
I'd like to do something like:

#if defined(__FreeBSD__)
#if (FREEBSD_MAJOR > 2) && (FREEBSD_MINOR > 2) && (FREEBSD_PATCH < 5)
...
#else
...
#endif
#endif

Thanks,
-Ted