[LLVMdev] llvm-gcc 4.0 question

[Dale Johannesen]

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 llvm-gcc-4.0 is no longer maintained.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.
>>
>>
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>