[Buildroot] Target support for Atmel ARM/AVR32

[Ulf Samuelsson <ulfs@dof.se>]

I am hoping to add Target support for a number of Atmel Development board,
but before I do that, I would like to discuss how this is done.

Would like to separate building the root file system from other utilities,
since the "build_<arch>" directory is overcrowded.

Currently I am using a "target_build_<arch>" directory.
In this directory, I create a subdirectory for each target_board.

I.E:
buildroot/target_build_arm
        at91rm9200dk
        at91rm9200df
        at91rm9200ek
        at91sam9260ek
        at91sam9261ek
        at91sam9262ek
or 
buildroot/target_build_avr32
        atstk1002

In the target_build_<arch>/<target_board> directory
I download patches for Linux/U-Boot before I apply them
and then build 
* Bootstrap
* U-Boot
* Linux
* Other Utitlties 
in that directory.

The results are renamed to show <target_board> and date.

Would like to move "buildroot/build_<arch>/root" to
"buildroot/target_build_<arch>/<target_board>/root" as well,
but have not yet gotten this to work.
(This will allow me to have different contents for different boards)

At the end, the result is moved to "buildroot/binaries/<target_board>"
so that I have easy way to create a delivery by just compressing
that directory into a tarball.

Does this seem to be a reasonable approach?

Best Regards,
Ulf Samuelsson
ulf at atmel.com
GSM:  +46 (706) 22 44 57
Tel:     +46  (8) 441 54 22
Fax:     +46 (8) 441 54 29
Mail: Box 2033  174 02 Sundbyberg
Visit: Kavalleriv?gen 24
          174 58 Sundbyberg'
Sweden
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