Re: [gentoo-user] Re: static-libs

[Stéphane Guedon]

Le Saturday 11 September 2010 22:52:09, walt a écrit :
> On 09/11/2010 02:13 AM, Stéphane Guedon wrote:
> > synce few days, I have a message of portage suggestiung me to use the
> > "static- libs" USE flag for media-libs/jpeg-6b.
> >
> > What may be the consequence ? Please be gentle with explaining this sorte
> > of things, as I have not the knowledges to understand the full compile
> > process, otherwise I am a little bit familiar with it !
>
> I have jpeg-8b, so I can't be sure about 6b.  I just turned on the
> static-libs USE flag and re-installed jpeg.  The only difference is that
> the 'static' lib "/usr/lib/libjpeg.a" wasn't there before and it is now,
> that's all.
>
> Is your system trying to upgrade jpeg to a newer version?  I notice that 6b
> doesn't use any USE flags, and the newer versions do use the static-libs
> flag. (Just re-installing 6b shouldn't complain about USE flags because
> the package doesn't look for them.)
>
> Any program that uses the dynamic libjpeg.so would need to be re-compiled
> if the version of jpeg changes.  If the static library is used instead,
> the program no longer needs libjpeg.so because the static library is
> linked into the binary executable at compile-time.  The price you pay is a
> larger binary executable, but you never need to worry about future jpeg
> version changes.
>
> I don't know how portage chooses between static and dynamic libs while
> building a package.  Anyone else know?

In fact, static-libs is for jpeg-8b , but Imade a mistake when write the 
mail...

So I can use the flag without worrying. Good !
Thanks !

-- 
Stéphane Guedon
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