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Re: Problems with autopackage and qt4

On Mon, May 18, 2009 at 21:32, Isak Savo <isak.savo@...> wrote:
> On Mon, May 18, 2009 at 3:00 PM, Juan Francisco Cantero Hurtado
> <juanfra684@...> wrote:
>> Any idea about my problems with qt4 and requireAtLeast?
>>
>
> My memory may fail me here, but I think this is the issue:
> requireAtLeast is a bit poorly named. One would think it does the same
> as require but also accepts higher versions. This is not what it does
> :)
>
> requireAtLeast works against the SOFTWARE_VERSION information of a
> skeleton, while require works against the INTERFACE_VERSION. The
> difference here is that SOFTWARE_VERSION reflects the version of the
> software ("duh") which typically is the same version you see on that
> softwares web page or in the normal package manager. The
> INTERFACE_VERSION, on the other hand, corresponds to the features
> supported by the skeleton (or rather, the library it represents).
>
> Let's take an fake example
> libFoo v1.0 is the first release. both INTERFACE_ and SOFTWARE_VERSION is 1.0
> libFoo v1.1 fixes some bugs, bumping SOFTWARE_VERSION to 1.1 but keep
> INTERFACE_VERSION at 1.0 since nothing has changed to its interface
> libFool v1.2 fixes bugs and adds new features, bumping
> SOFTWARE_VERSION to 1.2 and INTERFACE_VERSION to 2.0 (since perhaps it
> broke compability or something)
> ....a few years down the line....
> libFoo v10.5 is released, with SOFTWARE_VERSION set to 10.5 and
> INTERFACE_VERSION 1.8
>
> So, "Software version" is the version of the software, incremented
> with every release, while INTERFACE_VERSION represents version of the
> API/ABI and is incremented in every release *that changes the API or
> ABI*
>
> hope this explains a bit

Wow, thanks for the explanation :) (and yes, It poorly named :P )

--

-- 
Juan Francisco Cantero Hurtado <juanfra684@...> http://www.juanfra.info

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