[Buildroot] Target support for Atmel ARM/AVR32

[Bernhard Fischer <rep.dot.nop@gmail.com>]

On Wed, Jan 24, 2007 at 12:06:31PM +0100, Ulf Samuelsson wrote:
>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?

Building out of tree would make this alot easier and less complicated,
IMO.

$ svn co proto://buildroot /space/src/buildroot
$ mkdir -p /space/obj/board{1,2,3}
$ cd /space/obj/board1
$ make -f ../../src/buildroot HOSTCC="my-gcc" DL_DIR=/space/down

where picking up the DL_DIR from the user is not currently supported.
Not sure if we want that.
Index: package/Makefile.in
===================================================================
--- package/Makefile.in	(revision 17510)
+++ package/Makefile.in	(working copy)
@@ -33,8 +33,12 @@
 TOPDIR_SUFFIX:=
 endif
 
+ifndef DL_DIR
 DL_DIR=$(strip $(subst ",, $(BR2_DL_DIR)))
 #"))
+else
+$(warning "Using DL_DIR from environment and not from .config")
+endif
 ifeq ($(DL_DIR),)
 DL_DIR:=$(BASE_DIR)/dl
 endif