On Wednesday, 12 March 2014 at 12:14:23 UTC, Michel Fortin wrote:
On 2014-03-12 09:26:56 +0000, Iain Buclaw
<[email protected]> said:
On 12 March 2014 07:10, Jacob Carlborg <[email protected]> wrote:
Yeah, since Objective-C uses the C calling convention it's
mostly about
outputting symbols and data to the object files.
In what ABI may I ask? Your choices are:
- Traditional (32bit) ABI without properties and Obj-C 2.0
additions
- Traditional (32bit) ABI with properties and Obj-C 2.0
additions
- Modern (64bit) ABI
I made the 32-bit legacy runtime support, Jacob added the
64-bit modern runtime support.
There's no support at this time for properties declarations in
the ABI, but it doesn't really have much impact. As far as I'm
aware, Objective-C 2.0 additions only include property
declarations and attributes in the ABI.
That can be mixed in with either:
- GNU Runtime ABI
- NeXT Runtime ABI
It's been tested with the Apple (NeXT) runtime only. In all
honesty, I, and probably most people out there, don't care
about the GNU runtime. Although probably the GCC guys do. Do
you think it'd make it more difficult to merge GCC in the GCC
project if it had support for Apple's runtime and not for the
GNU one?
Also, is there a list of differences between the two runtimes
somewhere?
Each combination being incompatible with each other subtly
different ways...
Which is why we have a test suite.
There is an outdated list here,
http://wiki.gnustep.org/index.php/ObjC2_FAQ
I wouldn't care for GNUStep support.
Objective-C support in gcc is almost dead and GNUStep seems to
have hardly changed since I used WindowMaker as my main window
manager. Which was around 1999 - 2004!
--
Paulo
