Re: incompatibilities between base and libobjc2

[Richard Frith-Macdonald]

On 6 Sep 2010, at 23:15, David Chisnall wrote:
> 
>> - NSObject.h uses a TypedStream class, not present in libobjc2. (for read: 
>> and write: methods which are commented out). It looks like the TypedStream 
>> stuff has been unused for a long time, maybe it can be removed from NSObject?
> 
> Hmm, I thought these were conditionally compiled.  I think they can probably 
> go - they're for legacy compatibility with some really ancient stuff - but I 
> don't want to be the one to delete them...

I hid those methods and removed the include of the header.


>> - Source/GSPrivate.h uses "struct objc_category" and "Category"  which are 
>> not exposed by libobjc2. Not sure what to do for these..
> 
> 
> They are not exposed because they are an implementation detail that should 
> not be touched by anything except the compiler and the runtime.  Why does 
> GNUstep think that it needs them?

The category type is used for one of the arguments to the callback function 
called by the runtime when code is loaded from a bundle ... NSBundle needs the 
callback to record the classes which have been loaded, but I think the category 
argument is used only to determine whether a class or a category is being 
loaded.  Possibly libobjc2 might want to implement some different mechanism for 
letting NSBundle know what classes are loaded.