[LLVMdev] llvm-gcc 4.0 question

[Jose Rangel]

Thanks again, Dale. Hopefully, someone has the answer.

Jose


-----Original Message-----
From: Dale Johannesen [mailto:dalej at apple.com] 
Sent: Friday, January 29, 2010 3:52 PM
To: Jose Rangel
Cc: Dale Johannesen
Subject: Re: [LLVMdev] llvm-gcc 4.0 question


On Jan 29, 2010, at 3:13 PMPST, Jose Rangel wrote:

> Hi Dale,
>
> Is there a way to get llvm 4.2 and os x 10.4 to work together? I am
> trying to build on x86 10.5 for ppc 10.4 (using 10.4 sdk).

I don't think the prebuilt binaries are useful for this environment.   
You'll need to build things yourself.  I don't know of any reason llvm- 
gcc-4.2 using the 10.4 sdk wouldn't work, once you get it to build.    
Don't bother with llvm-gcc-4.0; for one thing, it had some PPC ABI  
bugs that are fixed in llvm-gcc-4.2.  Has anybody built for the  
environment Jose is targeting?

> Thx,
>
> Jose
>
>
> -----Original Message-----
> From: Dale Johannesen [mailto:dalej at apple.com]
> Sent: Friday, January 29, 2010 2:59 PM
> To: Jose Rangel
> Cc: Dale Johannesen; llvmdev at cs.uiuc.edu
> Subject: Re: [LLVMdev] llvm-gcc 4.0 question
>
>
> On Jan 29, 2010, at 2:55 PMPST, Jose Rangel wrote:
>
>> Hi Dale,
>>
>> Thanks for getting back. I may not be able to switch to llvm 4.2 at
>> this
>> time. I did try:
>>
>> llvm-gcc --emit-llvm -c sumarray.c -o sumarray.bc
>> llc -march=ppc32 sumarray.bc
>> gcc -arch ppc sumarray.s
>>
>> And this produced a ppc binary that worked (at least in this case).
>>
>> Do you know if this approach is worthwhile?
>
> That won't work in the general case, because there are things about
> the ABI, such as calling convention, that are embedded in the .bc
> file.  The front end needs to know you're targeting ppc.
>
>> Thx,
>>
>> Jose
>>
>>
>> -----Original Message-----
>> From: Dale Johannesen [mailto:dalej at apple.com]
>> Sent: Friday, January 29, 2010 2:50 PM
>> To: Jose Rangel
>> Cc: Dale Johannesen; llvmdev at cs.uiuc.edu
>> Subject: Re: [LLVMdev] llvm-gcc 4.0 question
>>
>> llvm-gcc-4.0 is no longer maintained.  Use llvm-gcc-4.2.
>>
>> On Jan 29, 2010, at 2:01 PMPST, Jose Rangel wrote:
>>
>>> Hi,
>>>
>>> I am using the llvm-gcc 4.0 front end binaries from llvm.org on an
>>> intel
>>> mac running 10.5.8. A couple of questions:
>>>
>>> 1) these binaries have "darwin8" as part of the file name. Are these
>>> compatible with OS X 10.5.8 aka darwin9?
>>>
>>> 2) assuming (1) is ok, if I compile a hello world program using: gcc
>>> -arch ppc hello.c, I get a ppc binary, but if I use llvm-gcc -arch
>>> ppc
>>> hello.c, I get an i386 binary. Is there a way to tell llvm-gcc 4.0  
>>> to
>>> produce a ppc binary? I've tried various options such as -march=ppc
>>> (or
>>> powerpc), -mpowerpc, but no luck.
>>>
>>> For llvm-gcc 4.2, the -arch ppc flag works.
>>>
>>> Thanks,
>>>
>>> Jose
>>>
>>> Jose Rangel
>>> QA Engineer
>>> Arxan Technologies, Inc.
>>>
>>>
>>> _______________________________________________
>>> LLVM Developers mailing list
>>> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
>>> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>>
>