RE: Problem with darwin_closure.S on 10.4.11/gcc 4.3.3

[David Fang <fang@csl.cornell.edu>]

Hi,
 	It might also help to direct gcc (-B) to use a newer assembler, 
or in this case directly invoke a newer assembler.  I often have to use 
odcctools' "as" (circa 2009-08-08) on powerpc-darwin8.  It should be 
available through fink (package I maintain) or macports.
 	In fink, we've never been able to get libffi tests to pass after 
3.0.4 on powerpc-darwin8.  I have a bug report here:
https://github.com/atgreen/libffi/issues/53
 	I suspect there are some incompatibilities with the 
system libunwind and unwind info, which changed from darwin9 to darwin10. 
I have not investigated further.

Fang

> Thanks Jay, that tip was very helpful. I didn't think about the define coming 
> from cc.
>
> In my case, it is indeed __ppc__ that is defined as expected for my PPC 7450 
> G4.
>
> I have narrowed down the issue to version 3.0.10.
>
> I downloaded 3.0.4 of libffi. Builds fine on Darwin 8.11.0 on my G4
> version 3.0.9 builds too, some warnings from ffi_darwin.c in function 
> ffi_call.
> version 3.0.10 build fails with the same errors in darwin_closure.S I noted 
> earlier.
>
> So, the code that was added in 3.0.10 to darwin_closure.S, specifically the 
> SAVE_SIZE define used in LCFI1 label in the sgu command seems to be a 
> problem.
>
> I'd be happy to look into these, if anyone could point me to the right OSX 
> assembler manual that has sg and sgu commands in it, that would be great.
>
> For now, I'll fall back to 3.0.4 and go with that version.
>
> --Ed
>
>> ---------------------------------------- > CC: mansky@mindspring.com > 
>> From: mansky@mindspring.com > >... > Where is the constant __ppc64__ 
>> defined in the code? Is it defined in > libffi code itself somewhere, or in 
>> the OSX system headers ? I > compared my G4 with my G5 and could not find 
>> __ppc64__ defined in the > system headers there either. >... > > Thanks, > 
>> --Ed  #defines often come from within cc.   Try this:    echo> 1.c 
>> echo> 1.s cc -dM -c  1.s -E         cc -dM -c  1.c -E       or       cc 
>> -arch ppc -dM -c  1.s -E  | grep ppc       cc -m64 -arch ppc -dM -c  1.s -E 
>> | grep ppc   (man gcc> 1.txt ; edit 1.txt)   - Jay
>> 
>
>
>

-- 
David Fang
http://www.csl.cornell.edu/~fang/