Re: [gentoo-user] issue on binary merge

[Sascha Lucas <sascha.lucas@rus.uni-stuttgart.de>]

>> emerge -1 --usepkg --pretend --verbose pkg_spec_from_equery
>>
>> then the change in USE-Flags are showen and my _correct_ binarys are used.
>>
>
> There's probably a good reason for it being the way it is, but it
> doesn't sound as transparent as we might like.

yes may be... if so, I would like to know the reason :-)


> A further interesting scenario might be to have a binary package
> available built with different USE flags to those on the target machine,
> and seeing if it gets installed or not.  I guess it shouldn't.  But then
> there's the CFLAGS issue as well, and I'm even more unsure how that's
> supposed to be handled.

If you build a binary with different USE flags then on the target it 
would be merged as ebuild and not as binary. But this seems only to work 
with --usepkg not with --getbinpkg. ?? CFLAGS handling is done in the same 
way like USE flags. You can use the tbz2tool to split your binary into 
data (tar) and info (text). In this info-text is every thing stored like 
USe, CFALGS, ....

> I'm still pretty new to Gentoo, but is this perhaps related to the
> feature I've read about (and maybe misremembered) regarding only
> packages that you explicity emerge going into world (dependencies
> don't)?  I wonder if you'd see different results if you explicitly
> emerged cups rather than it having been implicity emerged due to a
> dependency.  By doing the emerge you described you've 'promoted' those
> packages from implicit to explicit emerge.

Hm... yes every time you type emege .... it will be recorded in the 
world-file, expect emerge --oneshot (-1)... so my explicit merge will not 
be recorded in world it stays what it was before (world or dependency).

So I understand --usepkg in this way to use binary if all USE/C flags etc 
match. If not fallback to ebuilds. So I know I have the right binary pkgs, 
why does:

emerge -uDpv --newuse world

and

emerge -uDpv --newuse --usepkg world

show different results?

Sascha.
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