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Message-ID: <512AE08A.7020103@gmail.com>
Date: Sun, 24 Feb 2013 22:54:50 -0500
From: Michael Mol <mikemol@gmail.com>
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Subject: Re: [gentoo-dev] Re: kerberos, virtuals, rattling cages
References: <512ACBA1.7090209@gmail.com> <CAAr7Pr-MpaU=7AnHDiv2TTZafG36C=b61g5Fjwkf3uUs0oXgTA@mail.gmail.com> <512AD7E4.5000107@gmail.com> <pan$1919e$7d9c3f6$e43d6d12$b16c3580@cox.net>
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On 02/24/2013 10:40 PM, Duncan wrote:
> Michael Mol posted on Sun, 24 Feb 2013 22:17:56 -0500 as excerpted:
>=20
>>> I'm not following you here. 'slot' means a very specific thing. You a=
re
>>> not actually suggesting we use SLOT, you simply want both versions of=
>>> the library to be installed in one ROOT?
>>>
>>> I would not advocate this approach. You should strive to have only on=
e
>>> kerberos implementation on a given machine.
>>
>> I'm really not certain, to be honest. It was my impression that slots
>> allow for two different versions of a thing to be present on the same
>> system, and that their different sonames on the system would lead to
>> correct symbol resolution. (Although it would require that the soname
>> being sought be adjusted in a dependent program to target the version
>> required.)
>=20
> The issue is in one's definition of "two different versions of a thing"=
=2E
>=20
> "Slot", in the gentoo sense, has the meaning of two different versions =
of=20
> the same package, say qt-3 (tho that's long out-of-tree, but alive in k=
de-
> sunset) and qt-4 and qt-5 (tho that's very new, but is or will soon be =
a=20
> problem as more packages dep on it), where there'd ordinarily be file a=
nd/
> or functionality collisions, NOT two different packages containing the =
> same functionality, which is the extended meaning it appears you're=20
> applying here, but which only confuses people when used within the gent=
oo=20
> context.
>=20
My presumption was that both app-crypt/heimdal and app-crypt/mit-krb5
used the same binary names.
$ equery f app-crypt/mit-krb5|grep -e '\.so'|sed -e 's/\.so.*//'|sed -e
's/.*\///'|sort -u|grep -v debug
db2
encrypted_challenge
libgssapi_krb5
libgssrpc
libk5crypto
libkadm5clnt
libkadm5clnt_mit
libkadm5srv
libkadm5srv_mit
libkdb5
libkrb5
libkrb5support
pkinit
(on a different machine)
$ equery f app-crypt/heimdal|grep -e '\.so'|sed -e 's/\.so.*//'|sed -e
's/.*\///'|sort -u|grep -v debug
libasn1
libgssapi
libhcrypto
libhdb
libheimbase
libheimntlm
libhx509
libkadm5clnt
libkadm5srv
libkafs
libkdc
libkrb5
libroken
libsl
libwind
windc
The overlap between the two includes libkrb5, libkadm5clnt and
libkadm5srv. When I was thinking "why not slots?", that was explicitly
the part I was thinking of.
The distinction between two versions of a thing, and two implementations
of a thing, is a thorny epistemological issue; "extended meaning" is
good way to put it. I've acknowledge that abusing slots in this way is
pretty vile. I don't really care to advocate it; I merely brought it up
as an alternative. (But it seems it's a difficult question to bridge.)
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