Re: [gentoo-dev] dependences

[omestre]

Thanks very much!
  Some considerations...
  a) Did you ever seen the http://www.kernel.org site? The
Linux definition was there. I'm not making concepts. :)
  As well as the FreeBSD, Solaris and GNU definitions are
"sites's definitions". Take a look in kernel.org "What is
Linux"? ;)
  b) About your considarations about my work, thanks. I'm sure
that it will help me to do a better one. Just one more thing:
"It is a draft yet". If you can read the paper (In brazilian
portuguese), you will see that. It's a brainstorm, informations...
A lot of things will be present in the final release, and others
will not.
  Thanks, again.

On Sat, 17 Jul 2004, George Shapovalov wrote:

> Date: Sat, 17 Jul 2004 10:39:02 -0700
> From: George Shapovalov <george@g.o>
> To: gentoo-dev@l.g.o
> Subject: Re: [gentoo-dev] dependences
>
> I am not totally up yet, so I apologize in advance if I am getting too
> harsh :).
>
>> depends on SYSTEM PROFILE. In my home page have "graphs" and text files,
>> take a look and tell me if gentoo give a tool to get the informations
>> that i want: Especifics depends.
>>   Thanks!!
>> My home: http://www.via-rs.com.br/pessoais/leal
> Few comments:
> "Linux is a clone of the operating system Unix"
> If this goes any serious place, I'd suggest reading up a bit more of
> Unix/Linux history. As it stands now there is no paticular OS called Unix,
> there was a lot of fuss and a lawsuit involving the use of "Unix" and
> everybody for the most part was trying to avoid that name. Plus "clone" is
> soundng too strong, (such wording) may even suggest similarity to the point
> of binary compatibility (contrary to how dissimilar many of "proprietary
> unices" are). But enough on wording.
>
>
> Now the plots. Lets looks for example at this one (and its series):
> http://www.via-rs.com.br/pessoais/leal/Linux/debian-graph284-1.png
>
> Argh, is this a biz prezentation? This is definitely *not* a scientific
> plotting. You said this is a graph (I cannot see on this picture whether
> there are cycles, so I have to believe you), then why don't you use one of
> the standard representations, - top-to-bottom or left-to-right (choice mostly
> depends on figure dimensions and width/depth ratio). Oh, and make it *black
> and white* only and *flat*. Well, color may be used on informal plots but if
> this is aimed to go into the paper it should be BW only. Still the most
> important part is to lay it out differently. As it is now, I cannot gain any
> usefull information and rotating this damn blob will help very little. Your
> data is essentially 2D and mostly tied to one factor, do not try to be
> fancier than it is necessary.
>
> I am sorry man for sounding like an a%*, just doing too many papers
> recently :). My professor would have killed me if I were to try to pull
> something like this by him ;).
>
>
>> asking you help, to make my work as right as possible. One of
>> my principal tasks is determine how much dependences a package
>> have. With "qpkg" i have got that informations for my installed
>> gentoo system, but the "SYSTEM PROFILE" confuses me. Some packages
>> have as dependence the word "SYSTEM PROFILE" that is not a package,
>> but too many of them... So i have created a "fake" package "SYSTEM-PROFILE
>> " to my tasks... The question is: There is a manner to extract the
>> informations that i want, whithout this SYSTEM PROFILE?
>
> Now a short transitional part. What of circular dependencies? At least for
> some "basic" packages they are there (e.g. you need gcc to compile glibc and
> you need glibc for pretty much anything else, but this is way
> oversimplified). Debian hides this from you in their way, Gentoo does not
> exactly hide it, but lets you work around this complication in its own way.
> This is how the SYSTEM PROFILE gets around.
> It is not a package itself but rather a special way to describe what packages
> are considered "special". This includes the ones causing circular deps plus
> the rest of packages that are considered "common" (in a sense of being
> expected to be installed on any Unix-like system). In Gentoo you can select
> any of the multiple profiles provided to you  so that you can match it to the
> task at hand (look into /usr/portage/profiles). So this is what dpkg refers
> to when it says "SYSTEM PROFILE".
>
> Procedural note. At this time I would probably discourage the usage of dpkg as
> it slowly gets obsoleted by portage itself. Instead try
> emerge --pretend --emptytree pkgname
> (you can stick world or system instead pkgname there). However !!pay attention
> to what use flags you have selected!! This will vary your dep tree greatly!
> I'd suggest to do some serious reading here:
> http://www.gentoo.org/doc/en/index.xml#doc_chap3
> This should give you a good idea of how package handling is organized in
> Gentoo and what all these use flags are doing.
>
> Also, if you need deps to be printed as a tree instead of the list, you might
> want to look at portage code. It should not be too difficult to place some
> hooks to make it print self-digested dependency data (before it leys it out
> as a list).
>
> Hope this helps somewhat.
>
> George
>
>
> --
> gentoo-dev@g.o mailing list
>
>

omestre@××××××××××××.org
SDF Public Access UNIX System - http://sdf.lonestar.org

--
gentoo-dev@g.o mailing list