On Tue, 09 Sep 2014 07:58:49 -0000, Rajat Jain said:

Can someone tell me if the i386 one is to be used when we want to build for a
32bit machine and the x86_64 is to be used for 64 bit machine?

I wouldn't run either one on an actual machine.  Defconfigs are *example*
configs, only useful as a template for customizing for actual hardware.
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