[Buildroot] SVN, sources out of tree / VPATH... How?

[Arnout Vandecappelle <arnout@mind.be>]

On Saturday 20 August 2011 01:10:17, Ulrich Prinz wrote:
> I want to do some development for a new platform with buildroot. But I
> work with SVN. The first steps with a plain buildroot look good, but now
> I want to make changes to some existing code in buildroot (u-boot,
> kernel). And I want to checkin these changes into my SVN.

 There are patches on the mailing list to support local directories as the 
source of a package.  With those patches, you can extract the package source 
somewhere outside the buildroot tree (under version control), and use this as 
the source instead of a downloaded tar.


> The trick is, that you replicate the original mainline kernel paths in
> the other two sources and then make follows the priority of user/linux
> then bsp/kernel-x.y.z and then kernel-x.y.z/

 That's actually an overlay.  I think OpenEmbedded uses something like that.  
Buildroot prefers to work with patches.

 As an approximation of an overlay, you can write a script that automatically 
generates patches out of your revision control system and dumps them in the 
package directory.  The package infrastructure will apply all patches that are 
named <package>-<version><description>.patch.

 quilt is a tool that helps to work with this approach.  It's not trivial to 
use, but not much more difficult than any other VCS.

 
 Regards,
 Arnout


-- 
Arnout Vandecappelle                               arnout at mind be
Senior Embedded Software Architect                 +32-16-286540
Essensium/Mind                                     http://www.mind.be
G.Geenslaan 9, 3001 Leuven, Belgium                BE 872 984 063 RPR Leuven
LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle
GPG fingerprint:  31BB CF53 8660 6F88 345D  54CC A836 5879 20D7 CF43
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