On Sun, 03 Mar 2013 17:27:50 +0100 Thomas Sachau <to...@gentoo.org> wrote:
> Alexis Ballier schrieb:
> > On Sun, 03 Mar 2013 16:47:43 +0100
> > Thomas Sachau <to...@gentoo.org> wrote:
> >
> >> Alexis Ballier schrieb:
> >>> On Sun, 03 Mar 2013 14:02:58 +0100
> >>> Thomas Sachau <to...@gentoo.org> wrote:
> >>>>
> >>>> Once the eclass has per-ABI header
> >>>
> >>> I think this is needed.
> >>>
> >>>> and binaries support,
> >>>
> >>> but here, could you enlighten me on its use cases ? I can't imagine
> >>> why having multi binaries support would be useful.
> >>>
> >>> Alexis.
> >>>
> >>
> >>
> >> At least some binaries do have abi-specific output, which is used by
> >> other applications. As a good example of this, have a look at qmake
> >> and qmake based build systems.
> >
> > hmm, qmake doesnt seem to be the perfect example: how do you handle
> > this?
> >
> > - install qmake-${abi}
>
> ok
>
> > - ln -s qmake-${DEFAULT_ABI} qmake
>
> Just the same as with headers:
>
> You dont symlink the headers for the default ABI, but instead a wrapper
> is placed, which does then call/include the real target, so in this
> case, qmake is then a symlink to the abiwrapper, which does execute the
> real abi-specific binary, depending on the current ABI.
> We can of course place this abiwrapper in every place, where it is
> needed instead of the symlink, but having one central and package
> provided wrapper instead is easier to maintain and update.
>
> > - modify eqmake4 to call the right qmake when doing multilib?
>
> not needed at all (with multilib-portage), since when any package calls
> qmake to get any abi-specific details, the abiwrapper executes the
> binary, that matches the ABI and you get the right details for your ABI.
What do we need that wrapper for? What does the wrapper do? Does it
just rely on custom 'ABI' variable? Or maybe should it try to detect
whether it was called by a 64- or 32-bit app? What for?
It's just a needless complexity, a big tool to handle a few corner
cases. Alexis just pointed out a perfectly good way of handling it.
--
Best regards,
Michał Górny
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