Re: portability beetween openstep and gnustep

[Adam Fedor]

Nicola Pero wrote:
> 
> > I'm currently porting an application running on
> > openstep to make it word on gnustep.
> > But i ran in one big problem, all basic functions
> > implemented in openstep are not present in gnustep.
> 
> These functions are part of the Apple runtime, while GNUstep uses the GNU
> Objective-C runtime.
> 
> > That the case for the following functions :
> >
> > id objc_getMetaClass(const char *name)
> 
> These functions (or the equivalent functions) are present in the GNU
> Objective-C runtime as well, but usually with a different name; sometime
> with a slightly different syntax and/or API.
> 

GNUstep has a header <base/objc-gnu2next.h> which converts some of the
GNU functions to Apple equivalents. More might need to be added. PLus
some don't have equivalents. For instance, I don't believe there is an
equivalent for objc_getClassList.

In general you should try to avoid runtime specific functions and use
just functions available in OpenStep.