[Buildroot] How to rebuild root filesystem?

[Buildroot] How to rebuild root filesystem?

[Woody Wu]

Hi, 

Since things in my output/target got messed, hence I want to rebuild
everything in that directory and recreate the root filesystem image. How
can I ask buildroot to do it?

I knew that 'make clean' and 'make' will do it. But, my external
toolchain also get rebuilt, that can take very long time.

Thanks in advance.

-- 
I can't go back to yesterday - because I was a different person then

[Buildroot] How to rebuild root filesystem?

[Thomas Petazzoni]

Dear Woody Wu,

On Mon, 8 Jul 2013 12:56:58 +0800, Woody Wu wrote:

> Since things in my output/target got messed, hence I want to rebuild
> everything in that directory and recreate the root filesystem image. How
> can I ask buildroot to do it?
> 
> I knew that 'make clean' and 'make' will do it. But, my external
> toolchain also get rebuilt, that can take very long time.

No, if you're using an external toolchain, it does *not* gets rebuilt
every time you do make clean && make. It's the whole point of using an
external toolchain.

Best regards,

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

[Buildroot] How to rebuild root filesystem?

[Woody Wu]

On Mon, Jul 08, 2013 at 10:27:32AM +0200, Thomas Petazzoni wrote:
> Dear Woody Wu,
> 
> On Mon, 8 Jul 2013 12:56:58 +0800, Woody Wu wrote:
> 
> > Since things in my output/target got messed, hence I want to rebuild
> > everything in that directory and recreate the root filesystem image. How
> > can I ask buildroot to do it?
> > 
> > I knew that 'make clean' and 'make' will do it. But, my external
> > toolchain also get rebuilt, that can take very long time.
> 
> No, if you're using an external toolchain, it does *not* gets rebuilt
> every time you do make clean && make. It's the whole point of using an
> external toolchain.
> 

okay, may be it tooks too long time to make me think it was building the
toolchain, maybe it was just building the kernel. Whatever.

When I said external toolchain, I actually's talking about Code Sourery
which can be selected from buildroot toolchain configuration menu. Maybe
she's now so external.

Anyway, for my real question, is there a solution? How to reuild the
root filesystem from scratch.  Thanks!

-
woody

[Buildroot] How to rebuild root filesystem?

[Thomas Petazzoni]

Dear Woody Wu,

On Mon, 8 Jul 2013 22:12:10 +0800, Woody Wu wrote:

> okay, may be it tooks too long time to make me think it was building the
> toolchain, maybe it was just building the kernel. Whatever.
> 
> When I said external toolchain, I actually's talking about Code Sourery
> which can be selected from buildroot toolchain configuration menu. Maybe
> she's now so external.

If you're using the Sourcery CodeBench toolchain (formerly known as
CodeSourcery toolchains), then you are using an external toolchain, and
the toolchain never gets rebuilt.

> Anyway, for my real question, is there a solution? How to reuild the
> root filesystem from scratch.  Thanks!

The only safe solution is "make clean && make". Any other solution
risks of giving you an inconsistent filesystem in terms of library
dependencies.

Best regards,

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