[Buildroot] [RFC] [PATCH 0/5] Buildroot cleanup
will.newton at gmail.com
Tue Sep 8 17:03:58 UTC 2009
On Mon, Sep 7, 2009 at 11:09 PM, Thomas
Petazzoni<thomas.petazzoni at free-electrons.com> wrote:
> I would like to propose a few patches to start a cleanup of
> Buildroot. My goal is not only to cleanup Buildroot internally, but
> also to clean it up so that it is easier to understand for our users.
> This thread is meant to be a preliminary discussion only and is not
> yet a request for inclusion, because :
> * Some of the proposed changes remove features that I think confuse
> our users and are not central in Buildroot operation, but others
> might have different opinion on the matter ;
> * The changes are relatively invasive and I did only limited testing
> on them.
> * The documentation is not updated with the changes. I'm waiting for
> the community opinion on the changes before spending time to update
> the documentation
> While the commit logs gives all the details, I would like to give an
> quick overview of the proposed changes :
> 1. Remove the "project" feature.
> This feature is meant to allow an user to build a Linux system for
> several similar platforms where the differences are only in
> Busybox, kernel and U-Boot configuration. While this feature might
> be useful in some very specific cases, my opinion is that it adds
> far too much complexity in Buildroot compared to the added-value
> it gives.
> Removing this feature allows to instantly make the directory
> layout a lot simpler to understand for a newcomer (no strane
> project_build_ARCH directory anymore !)
I think this is probably the right thing to do, the project support
has never made much sense to me.
> 2. Remove the BOARD/LOCAL feature.
> This mechanism is a duplication of something that could already be
> done in a different way: by adding a new target in target/device/.
I didn't know this existed.
> 3. By default, put the output directories in a single directory,
> named output/.
> Nothing complex, it just clarifies the tree for a new user.
> 4. Remove BR2_TOPDIR_PREFIX and BR2_TOPDIR_SUFFIX
> The same thing can be done with O=
I didn't know this existed either!
> 5. Rename the output directories with more sensible names.
> In the output directory, we now have
> - build/ where all the packages are built
> - images/ where the final kernel and rootfs images are stored
> - staging/ the staging directory (containing the development files
> and libraries compiled for the target)
> - target/ which contains the target root filesystem
> - host/ which contains all the host programs
> - stamps/ which contains the stamps files
> Thanks for your input,
One thing I want to do quite often is to keep my toolchain but rebuild
my target fs from scratch, so:
# rm -rf build_i686 project_build_i686
It looks like this might be a little bit more complex now. It would be
good to get some makefile targets that can do this, it's possible they
already exist but I'm just not aware of them.
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