Subject: Re: is __NetBSD_Version__ being misused (again) ?
To: None <email@example.com>
From: Pavel Cahyna <firstname.lastname@example.org>
Date: 11/17/2007 12:03:14
On Sat, Sep 01, 2007 at 03:38:18AM +0700, Robert Elz wrote:
> Date: Fri, 31 Aug 2007 18:57:49 +0100
> From: Matthias Scheler <email@example.com>
> Message-ID: <20070831175749.GA487@colwyn.zhadum.org.uk>
> | Probably 400000003,
> In that case you (someone) really need to answer the part of the
> message about how the __NetBSD_Prereq__() macro is supposed to work.
> If __NetBSD_Version is 400000003 then
> __NetBSD_Prereq__(4,0,0) fails
> __NetBSD_Prereq__(4,0,1) succeeds, but that says 4.0.1 is OK, and
> we cannot possibly know that yet.
> The macro simply assumes that the last digits aren't ever going to be
> used. Changing the macro would probably require another version bump...
> (as well as being needlessly disruptive).
As the release is approaching, it would be good to solve this problem if
there is any.
But I must admit I don't see it. __NetBSD_Prereq__ is defined as:
#define __NetBSD_Prereq__(M,m,p) (((((M) * 100000000) + \
(m) * 1000000) + (p) * 100) <= __NetBSD_Version__)
so __NetBSD_Prereq__(4,0,0) will succeed if __NetBSD_Version__ is
Also, given that there are probably exactly 0 uses of __NetBSD_Prereq__ in
the world (google code search reveals no uses outside the file where it is
defined) and that the test was wrong for a long time before anybody
noticed, I don't think issues with it are especially important.