How to identity processor architecture

[prabhu]

Mandeep Sandhu wrote:
>> I guess a 64bit processor does need 64bit addresses to reference memory. But
>> at the same time, if 32 bit programs are to run unmodified on 64 bit
>> architectures there needs to be ways in which 32bit pointers can still work.
>> So, I am almost 100% sure that compiling 32bit code, even on a 64bit
>> processor, should yield 4 for sizeof(void*)
>>     
>
> You are 100% right. Tried this on  2 laptops:
>
> printf("Is this a %s-bit machine?\n", ((sizeof(void*) == 4) ? "32" : "64"));
>
> 32-Bit ubuntu (10.10) on 64-bit proc:
> "Is this a 32-bit machine?"
>
> 64-Bit ubuntu (10.10) on 64-bit proc:
> "Is this a 64-bit machine?"
>
> Regards,
> -mandeep
>   

Hi Mandeep,

Thanks a lot.

So is there any other way available to identify the processor 
architecture using c code?? . The program needs to return correct
processor architecture(32bit or 64bit) irrespective to the OS architecture.

Thanks,
Prabhu
>> Enrico Granata
>> Computer Science & Engineering Department (EBU3B) - Room 3240
>> office phone 858 534 9914
>> University of California, San Diego
>>
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>
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