Re: [AD] 5.0 and 5.2 on the same system

[Tobias Hansen <thansen@xxxxxxxxxx>]

On 12/11/2012 09:18 AM, Peter Wang wrote:
> On Mon, 10 Dec 2012 22:32:26 +0100, Tobias Hansen<thansen@xxxxxxxxxx>  wrote:
> > By the way, the pkgconfig files
> > already have this flaw. It would be better if they also would not have
> > the ".0".
> I also think it's a problem.
>
> The minor version suffix slightly helps the parallel installation case.
> You can have one of each Allegro branch listed on your PKG_CONFIG_PATH
> then choose between them on the pkg-config command-line.  It's a pretty
> high cost for that, though, if every program that depends on Allegro
> needs to probe multiple branches.
>
> It also doesn't help the more general case.  You can't choose between
> 5.1.3 and 5.1.4 on the pkg-config command-line.  That's doable by
> putting the desired version earlier on PKG_CONFIG_PATH.
>
> We _could_ release Allegro 5.2 with *-5.0.pc files, or we may consider
> transitioning to branch-neutral names.

Now, with few packages using Allegro 5 yet, it is still a good time for 
changing it to *5.pc. There are no programs using Allegro 5 in Debian 
yet and it can't be many in Fedora either.
> Peter
>
> PS. GTK+2 still uses gtk+-2.0.pc though I don't know what the "2.0"
> means to them.

I think they just created them for GTK+ 2.0 and kept the name when they 
realized that subsequent versions are source compatible and changing it 
to *2.pc would already have been to much hassle. Another explanation 
would be that they have a separate version number reserved for 
incompatible API changes.