From:	"John M. Aldrich" <fighteer AT cs DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Allegro2.2 vs Allegro3.0?
Date:	Fri, 03 Apr 1998 18:39:22 -0500
Organization:	Two pounds of chaos and a pinch of salt.
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RicMK wrote:
> 
>     I have been using Allegro2.2 for a while and it works great.  What I
> want to know is wether or not it is worth it to upgrade to Allegro3.0?
> Will I have to change my old code?  Do I have to uninstall Allegro2.2?
> Could somebody please point me in the right direction :)

Allegro 3.0 has substantially improved features over Allegro 2.2,
particularly in 3D graphics code and high-color support.  Shawn has also
changed the way in which Allegro installs itself; it goes into a
standard part of the DJGPP tree now.  You can unzip it without
overwriting any part of your 2.2 files, but when Allegro builds it
copies its header and library into the DJGPP include and lib
directories, overwriting the ones that you currently have.

As for backwards compatibility, you should be able to compile old code
just fine with the new version of Allegro.

The only gotcha to look for is that the initial release of Allegro 3.0
didn't take into account the new file structure of gcc 2.8.0, so it
would claim that DJGPP wasn't installed when you tried to build it.  The
latest zipfile on SimTel, dated March 15, 1998, has the necessary fix.

hth

-- 
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|      John M. Aldrich       | "A committee is a life form with six |
|       aka Fighteer I       | or more legs and no brain."          |
|   mailto:fighteer AT cs DOT com   |                                      |
| http://www.cs.com/fighteer |                 - Lazarus Long       |
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