Hi Sir,

I am trying to understand u-boot source code. As a starting point, I compiled u-boot for beaglebone black and successfully executed it on beaglebone hardware. My question is related to compilation step.

The u-boot can be compiled with the following switches on *make.*

*1. am335x_beaglebone_defconfig* *2. am335x_beaglebone_config* *3. am335x_evm_defconfig* *4. am335x_evm_config*

All compiles fine. but whats the difference b/w " **_defconfig" AND " *_config". *Interestingly there are no script in the /config directory ending with *_config *(all ends with _defconfig). I tried to read the Makefile to find out if these switches may be pointing to a file but couldn't get it.

Please give me a direction in this regard. Are they switches or name of configuration files? waiting for your kind reply.

Kind regards, Ijaz