Re: FW: 64 bit or 32 bit

[Benoit Rouits <brouits@xxxxxxx>]

Le lundi 20 août 2007 à 19:36 +0100, Glynn Clements a écrit :
> Benoit Rouits wrote:
> 
> > > How can I tell if a given system is running a 32bit krnel or a 64bit
> > > kernel. I a system capable of running either, but I cannot figure
> > > out which kernel is installed on it.
> > 
> > just make a C program like this:
> > 
> > int main()
> > {
> > 	printf("address bus is %d bytes\n",sizeof(void*));
> > }
> > and compile it with cc then run it.
> > If it prints 8, it is a 64 bit OS, if it prints 4, it is a 32 bit OS.
> 
> That tells you which architecture the program was compiled for, not
> which architecture the kernel was compiled for. x86_64 can run both
> 32- and 64-bit code.
> 
well, if we have a 64-bit kernel /and/ a compiler for 64 bits
architectures, i think that a long int must be 8 bytes, no ?
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