Re: How to port to GNUstep ?

[ramana rao]

Hi,

We did port a huge protion of our fault management System, the server
portion from WebObjects3.5 to GNUstep on solaris. Had some good experience
in these matthers, also interested to share the knowledge

We had got a a very valuable help from Discussion group while portng this
system

Key points:
    1.Our Client still runs in WebObjects4.0, there is socket communication
between Client and Server. And we are transfering objects from GNUstep to
Openstep, to and fro, for this we are using a platform indepedent archiver
in place of NSArchiver. It is GMArchiver that comes with GNUstep.

    2. There are few GNUstep specific problems, for example [NSNumber
numberWitjLongLond:(long long) x]; does not work etc....

thanks

Ramana Rao
Orillion
Hyderabad


----- Original Message -----
From: "Georg Fleischmann" <georg@vhf.de>
To: "Richard van Paasen" <rvpaasen@dds.nl>
Cc: <discuss-gnustep@gnu.org>
Sent: Friday, November 23, 2001 10:09 PM
Subject: Re: How to port to GNUstep ?


> Hi Richard,
>
> > 1. 2.
>
> Already answered
>
>
> > 3.
> > What will have to be done to port (parts of) the application from
> > OpenSTEP to GNUstep? Will it run out of the box or do I have to
> > fix things first?  Which tools are available?
>
> If the application contains advanced PostScript code you have to rewrite
these
> parts of the code.
> I had to remove all pswraps and PostScript user paths from my application.
> This is not a big problem, since they can be replaced by other functions
and methods.
>
>
> > 4.
> > Are there applications which have been successfully ported from
> > NeXTSTEP? And applications that could not be ported? I am looking
> > for experiences of other people.
>
> I have ported a constructional application (CAD/CAM app, about 200.000
LOC)
> from NextStep to Openstep to GNUstep. On my way to GNUstep I had to
rewrite
> some parts of the application to replace the PostScript. My application is
> running now, but there are still a few bugs to fix in the AppKit of
GNUstep.
> But that's just a question of time and absolutely doable.
>
> The nib files can be converted to gmodel files using nib2gmodel. This is
done
> a little bit easier on OpenStep 4.2 than Mac OS X, since Apple has changed
the
> menu structure and the dimensions of the buttons etc.
> The generated gmodel files need only few corrections by hand (or script):
> - Umlauts (if any) need to be converted from Standard to ISO encoding.
> - the Names of Custom Classes (if any) need to be replaced by hand
>
>
> > 5.
> > How can you tell when it will be easy/hard to port an application
> > from NeXTSTEP to GNUstep?
>
> If your application is using graphical elements like rotated and scaled
text,
> pswraps, Type 3 Fonts, then it will be harder (Drawing or Constructional
apps).
> Otherwise it should be quite straight foreward.
>
> Georg
>
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