Re: Differences between Gnu-step and Cocoa

[David Chisnall]

Hi Tommy,

There is a list of current API compatibility somewhere, but I can't  
find it at the moment.  A good few rules of thumb are:

- Try to stick to Foundation and AppKit.  A few other frameworks, like  
AddressBook, also work, but are external to the core GNUstep  
distribution.

- Anything that says 'OS X 10.0 or later' in Apple's documentation is  
likely to work.  Anything that says 10.5 or later probably won't  
work.  For 10.1 to 10.4, the probability gradually drops.  As such,  
it's best to try to stick to 10.0 stuff and test other things on  
GNUstep before relying on them.

- Reading nib files on GNUstep is still somewhat hit and miss.  Some  
things work perfectly, some fail weirdly.  If you are encountering  
strange bugs, try redrawing your nibs in gorm.

You may also find some slight inconsistencies between GNUstep and  
Cocoa.  For example, the NSFileManager method for creating a directory  
on Cocoa requires the parent directory to exist, but on GNUstep will  
create all intervening directories if they are missing (Leopard  
introduces a new method for doing this).

David

On 9 Dec 2007, at 15:33, Tommy Nordgren wrote:

> I'm considering writing a (GUI) application as open-source on Mac OS  
> X Leopard.
> I'm wondering if there is any document available that describes the  
> differences between
> the Cocoa API on Mac OS X, and the Gnu-step API. If possible, I want  
> to write my code
> so that it is easily portable to other operating systems.
> ------------------------------------------------------
> "Home is not where you are born, but where your heart finds peace" -
> Tommy Nordgren, "The dying old crone"
> tommy.nordgren@comhem.se
>
>
>
>
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