linux-kernel - Re: [take9 1/2] kevent: Core files.

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Message-ID: <20060821130121.GA2602@2ka.mipt.ru>
Date:	Mon, 21 Aug 2006 17:01:21 +0400
From:	Evgeniy Polyakov <johnpol@....mipt.ru>
To:	Bernd Petrovitsch <bernd@...mix.at>
Cc:	Christoph Hellwig <hch@...radead.org>,
	lkml <linux-kernel@...r.kernel.org>,
	David Miller <davem@...emloft.net>,
	Ulrich Drepper <drepper@...hat.com>,
	Andrew Morton <akpm@...l.org>, netdev <netdev@...r.kernel.org>,
	Zach Brown <zach.brown@...cle.com>
Subject: Re: [take9 1/2] kevent: Core files.

On Mon, Aug 21, 2006 at 02:53:25PM +0200, Bernd Petrovitsch (bernd@...mix.at) wrote:
> On Mon, 2006-08-21 at 15:13 +0400, Evgeniy Polyakov wrote:
> [...]
> > And what is the difference between
> 
> As others already pointed out in this thread:
> 
> These are not seen by the C compiler.
> > #define A 1
> > #define B 2
> > #define C 4
> > and
> 
> These are known by the C compiler and thus usable/viewable in a
> debugger.
> > enum {
> >  A = 1,
> >  B = 2,
> >  C = 4,
> > }
> > ?

:) And I pointed quite a few other issues about enums vs. defines.
According to this one - no one wants to watch enums in debugger.

And, ugh:

(gdb) list
1       enum {
2               A = 1,
3               B = 2,
4       };
5
6       int main()
7       {
8               printf("%x\n", A | B);
9       }
(gdb) bre 8
Breakpoint 1 at 0x4004ac: file ./test.c, line 8.
(gdb) r
Starting program: /tmp/test 

Breakpoint 1, main () at ./test.c:8
8               printf("%x\n", A | B);
(gdb) p A
No symbol "A" in current context.


Actually I completely do not care about define or enums, it is really
silly dispute, I just do not want to rewrite bunch of code _again_ and
then _again_ when someone decide that defines are better.

-- 
	Evgeniy Polyakov
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