Re: [Swarm-Support] x86_64 and message forwarding

[Bill Northcott]

On 28/08/2006, at 10:59 AM, Marcus G. Daniels wrote:
> > > I have found that they have been responsive to fixing behaviour  
> > > in their compiler which differs from that of the FSF one.  So it  
> > > is worth testing and filing bugs if we find it does not work.
> I just tried compiling that test case with -fgnu-runtime on a Mac  
> Pro, but apparently they don't provide the GNU runtime by default.

The R project are distributing a compiler with their current  
Universal MacOS X binary.  It is done with some of the Apple  
sources.  So it understands -arch and other flags for the compiler  
drivers but includes gfortran and gnu-libobjc.  The libobjc is a fat  
(ppc 1386) file.  I don't think there are working versions of either  
ppc64 or x86-64 gnu libobjc.  Even the Apple libobjc in the current  
publicly available 10.4u SDK is only ppc/i386.  Presumably, the  
Leopard preview has 64 bit versions to support the promised 64bit  
Cocoa.  On previous form, none of this source code will get released  
until Leopard ships.

> For the native runtime, I see no directly equivalent interface to  
> the sel_get_type so I think it's likely that alternative call  
> dissection code will be needed in DefObject.m instead of the  
> mframe_* calls.  It's simple usage in Swarm, and should be easy to  
> augment/replace once a workable alternative is identified...

I still have to get a clear picture in my head of which bits of the  
existing code do what at this level.  There seem to be chunks grafted  
in from other open source projects in which not all of the code is  
functional.  I just need to find more time to spend on it.

Bill