[Buildroot] Multiple architectures best practices?

[Buildroot] Multiple architectures best practices?

[Terry Forrest]

[apologies for the duplicate - previous note lacked a subject ] 

Hi All - new to buildroot and am impressed!  Nice design
and implementation.

We would like to use BR to build for two architectures from
the same tree.  We can use a local x86 for a "simulation" mode,
and the target is arm.  I see that this is cleanly supported in the
2009.11 release.

My question is on a "best practice" for this.  I've set up 
a top-level Makefile that goes something like this:


TOPDIR    = path_to_my_top
BUILD   = ${TOPDIR}/build
BUILDROOT = buildroot-2009.11
BROOT    = ${BUILD}/${BUILDROOT}

setup-x86:
    cp configs/buildroot-config-x86 ${BROOT}/.config
    ${MAKE} -C ${BROOT} oldconfig

setup-arm:
    cp configs/buildroot-config-arm ${BROOT}/.config
    ${MAKE} -C ${BROOT} oldconfig

build-x86: setup-x86
    make -C ${BROOT} O=${BUILD}/output_x86 

build-arm: setup-arm
    make -C ${BROOT} O=${BUILD}/output_arm

This seems to work okay - any comments or warnings?
Again, I'm new to BR and want to make sure I'm not 
gonna step in anything.

Thanks!
Terry 		 	   		  
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[Buildroot] Multiple architectures best practices?

[Thomas Petazzoni]

Hello Terry,

On Tue, 29 Dec 2009 14:44:51 -0500
Terry Forrest <zippybot7@hotmail.com> wrote:

> Hi All - new to buildroot and am impressed!  Nice design
> and implementation.

Thanks!

> We would like to use BR to build for two architectures from
> the same tree.  We can use a local x86 for a "simulation" mode,
> and the target is arm.  I see that this is cleanly supported in the
> 2009.11 release.
> 
> My question is on a "best practice" for this.  I've set up 
> a top-level Makefile that goes something like this:

> This seems to work okay - any comments or warnings?
> Again, I'm new to BR and want to make sure I'm not 
> gonna step in anything.

Your Makefile looks good to me.

Cheers,

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com