[Buildroot] Help understanding how to develop with buildroot

[Buildroot] Help understanding how to develop with buildroot

[Mike Crowe]

Hi folks,

Apologies if this is obvious, but I haven't been able to find the right
words to search for it:

It appears that BR copies my new package from packages/ to build_arm/ and
compiles it.  However, if I have to do a lot of source code changes, it
appears that I should edit the build_arm directory and then sync it back to
packages when I have it running.

Is this the right flow?  Are there any instructions or tools to help do
this?

TIA
Mike
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[Buildroot] Help understanding how to develop with buildroot

[Peter Korsgaard]

>>>>> "Mike" == Mike Crowe <drmikecrowe@gmail.com> writes:

Hi,

 Mike> Apologies if this is obvious, but I haven't been able to find the
 Mike> right words to search for it:

 Mike> It appears that BR copies my new package from packages/ to
 Mike> build_arm/ and compiles it.

Yes. Notice that the 2009.11 release is out now, and it has a somewhat
different (simpler) build directory layout.

 Mike> However, if I have to do a lot of source code changes, it appears
 Mike> that I should edit the build_arm directory and then sync it back
 Mike> to packages when I have it running.

Yes, if you need to patch something in the package sources, you'll need
to make a patch (quilt is nice for this) and copy it to
package/<something>/. Make sure you name it <something>-*.patch
otherwise it won't be applied.

What exactly is it that you are changing? If you're fixing something
general, then please submit those patches to the package upstream and us
so we can integrate it into buildroot.

 Mike> Is this the right flow?? Are there any instructions or tools to help do this?

It is, but it's pretty uncommon to have to do project specific patching
of the packages.

-- 
Bye, Peter Korsgaard

[Buildroot] Help understanding how to develop with buildroot

[Mike Crowe]

>
> What exactly is it that you are changing? If you're fixing something
> general, then please submit those patches to the package upstream and us
> so we can integrate it into buildroot.
>
> I'm starting to port our application to an embedded device.  I think there
will be quite a few changes, and it's a fairly large application.  I believe
there may be week(s) changing the application to get it to run in the new
environment.  That's why I wanted to avoid a complete recompile each build.

Mike
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[Buildroot] Help understanding how to develop with buildroot

[Peter Korsgaard]

>>>>> "Mike" == Mike Crowe <drmikecrowe@gmail.com> writes:

Hi,

 Mike> I'm starting to port our application to an embedded device. ?I
 Mike> think there will be quite a few changes, and it's a fairly large
 Mike> application. ?I believe there may be week(s) changing the
 Mike> application to get it to run in the new environment. ?That's why
 Mike> I wanted to avoid a complete recompile each build.

OK, you can trigger a rebuild of just your package by removing the
correct file (depends on how you integrated it in BR what that file is)
or simply delete the build_arm/<package> directory.

For initial development with lots of compile/test/fix cycles it probably
makes more sense to build your application by hand instead of in BR
though.

-- 
Bye, Peter Korsgaard

[Buildroot] Help understanding how to develop with buildroot

[Thomas Petazzoni]

Le Thu, 03 Dec 2009 14:13:22 +0100,
Peter Korsgaard <jacmet@uclibc.org> a ?crit :

> OK, you can trigger a rebuild of just your package by removing the
> correct file (depends on how you integrated it in BR what that file
> is) or simply delete the build_arm/<package> directory.

See also http://buildroot.org/buildroot.html#rebuilding_packages for
details.

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

[Buildroot] Help understanding how to develop with buildroot

[Mike Crowe]

Perfect!  That's exactly what I needed guys, thank you!

On Thu, Dec 3, 2009 at 8:24 AM, Thomas Petazzoni <
thomas.petazzoni@free-electrons.com> wrote:

> Le Thu, 03 Dec 2009 14:13:22 +0100,
> Peter Korsgaard <jacmet@uclibc.org> a ?crit :
>
> > OK, you can trigger a rebuild of just your package by removing the
> > correct file (depends on how you integrated it in BR what that file
> > is) or simply delete the build_arm/<package> directory.
>
> See also http://buildroot.org/buildroot.html#rebuilding_packages for
> details.
>
> Thomas
> --
> Thomas Petazzoni, Free Electrons
> Kernel, drivers and embedded Linux development,
> consulting, training and support.
> http://free-electrons.com
> _______________________________________________
> buildroot mailing list
> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot
>
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