[gentoo-user] Depclean and cross-foo/gcc

[gentoo-user] Depclean and cross-foo/gcc

[Daniel Barkalow]

I've been doing a lot of --depclean lately, and I've run into something 
odd. "emerge --depclean cross-avr/gcc" wants to remove all 3 versions, but 
it's in my world file. On the other hand, "emerge --depclean" doesn't want 
to remove any of them. I initially set this up with a crossdev that's now 
quite ancient, which may be significant, but I don't want to entirely redo 
all my avr compilers to get them with the new crossdev.

What I'd actually like is to have a specific version (the one that our 
code is most heavily tested with), and the latest version (to test that). 
Is there some way to have --depclean see a dependancy on a specific 
version (or slot, as I've already masked other versions that would be in 
that slot) from world or the equivalent?

	-Daniel
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Re: [gentoo-user] Depclean and cross-foo/gcc

[Zac Medico]

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Daniel Barkalow wrote:
> I've been doing a lot of --depclean lately, and I've run into something 
> odd. "emerge --depclean cross-avr/gcc" wants to remove all 3 versions, but 
> it's in my world file. On the other hand, "emerge --depclean" doesn't want 
> to remove any of them. I initially set this up with a crossdev that's now 
> quite ancient, which may be significant, but I don't want to entirely redo 
> all my avr compilers to get them with the new crossdev.
> 
> What I'd actually like is to have a specific version (the one that our 
> code is most heavily tested with), and the latest version (to test that). 
> Is there some way to have --depclean see a dependancy on a specific 
> version (or slot, as I've already masked other versions that would be in 
> that slot) from world or the equivalent?

I think you want --prune, since --depclean behaves like a dependency
aware version of --unmerge.

Zac
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Re: [gentoo-user] Depclean and cross-foo/gcc

[Daniel Barkalow]

On Fri, 19 Oct 2007, Zac Medico wrote:

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> 
> Daniel Barkalow wrote:
> > I've been doing a lot of --depclean lately, and I've run into something 
> > odd. "emerge --depclean cross-avr/gcc" wants to remove all 3 versions, but 
> > it's in my world file. On the other hand, "emerge --depclean" doesn't want 
> > to remove any of them. I initially set this up with a crossdev that's now 
> > quite ancient, which may be significant, but I don't want to entirely redo 
> > all my avr compilers to get them with the new crossdev.
> > 
> > What I'd actually like is to have a specific version (the one that our 
> > code is most heavily tested with), and the latest version (to test that). 
> > Is there some way to have --depclean see a dependancy on a specific 
> > version (or slot, as I've already masked other versions that would be in 
> > that slot) from world or the equivalent?
> 
> I think you want --prune, since --depclean behaves like a dependency
> aware version of --unmerge.

According to the man page, --prune will remove the old version that I want 
to keep. I want to have 3.4.4-r1 and (currently) 4.2.2, but I don't care 
about 4.1.2. When 4.2.3 comes out, I'll want that instead of 4.2.2.

	-Daniel
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Re: [gentoo-user] Depclean and cross-foo/gcc

[Zac Medico]

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Daniel Barkalow wrote:
> According to the man page, --prune will remove the old version that I want 
> to keep. I want to have 3.4.4-r1 and (currently) 4.2.2, but I don't care 
> about 4.1.2. When 4.2.3 comes out, I'll want that instead of 4.2.2.

The problem is that world atoms are greedy with respect to slots, so
 if you have cross-avr/gcc in world then a global `emerge
- --depclean` will not remove 4.2.2 after 4.2.3 has been installed.
System atoms are not greedy for slots, so you can solve the problem
like this:

mkdir -p /etc/portage/profile
echo "*cross-avr/gcc" >> /etc/portage/profile/packages
echo "*cross-avr/gcc:3.4" >> /etc/portage/profile/packages

That pull the highest available overall and the highest available
from the 3.4 SLOT into your system set (the "packages" file is
documented in `man portage`). Remove the cross-avr/gcc atoms from
/var/lib/portage/world since you won't need them anymore. Once
you've done that, a global `emerge --depclean` should remove
everything except the highest available overall version and the
highest available from the 3.4 SLOT.

Zac
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