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List:       kde-core-devel
Subject:    Re: [kde-freebsd] Re: objprelink patch for freebsd
From:       Andy Fawcett <andy () athame ! co ! uk>
Date:       2001-12-05 7:25:28
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At 08:02 5.12.2001 +0100, Bradley T Hughes wrote:
>On Wednesday 05 December 2001 07:43, Andy Fawcett wrote:

> > The original objprelink was doing pretty much nothing on FreeBSD, for
> > precisely the reasons Bradley updated it.

[snip]

> > But since objprelink most likely wouldn't have found any references with
> > the linux-style prefix, I think it was pretty safe.
>
>Actually, it's not a linux-specific prefix.

Bad choice of words on my part. I meant "the style used by linux, and used 
in the original objprelink" :)

>It has to do with how the vtables are generated.  gcc uses vtable-thunks 
>on linux by default (the __vt_ prefix), yet on freebsd we use the 
>"normal", which is the _vt prefix.

But because of the different prefix used, on 'standard' (ahem) FreeBSD 
systems (without modified compilers etc), the original program should have 
had little or no effect, either way?

>If and when freebsd moves over to using vtable-thunks (a much nicer way of
>doing vtables too, since you aren't restricted in vtable size as with the
>normal method), then the patch needs to be reverted...

I guess that it should be possible to build some compile-time checks in 
there to see which 'flavour' of prefix to use.

Andy


-- 
Andy Fawcett          | "In an open world without walls and fences,
andy@athame.co.uk     | we wouldn't need Windows and Gates." --anon
http://athame.ath.cx/ |

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