[poky] Building custom Linux kernel with own layer

[Bryan Evenson]

> -----Original Message-----
> From: Bruce Ashfield [mailto:bruce.ashfield at gmail.com]
> Sent: Wednesday, March 20, 2013 1:02 PM
> To: Bryan Evenson
> Cc: poky at yoctoproject.org
> Subject: Re: [poky] Building custom Linux kernel with own layer
> 
> On Wed, Mar 20, 2013 at 11:59 AM, Bryan Evenson
> <bevenson at melinkcorp.com> wrote:
> > I have an Atmel AT91SAM9G25 based board and have been using the
> Classic OpenEmbedded development tree for my device.  I am working on
> switching to using the Poky distribution.  I found a Yocto layer that
> someone else had started here: https://github.com/baseapp/meta-
> atmel/tree/yocto.  I would like to use this layer as a starting point
> and go from there.  The layer looks to be setup to build kernel 2.6.39
> (as that is the kernel I am currently using), but that's not what's
> happening on my system.  I would like some help in figuring out what
> needs to change with the layer or my setup to build the 2.6.39 kernel.
> >
> > I am using the stable poky-danny-8.0 release (downloaded tarball).
> Under the poky-danny-8.0 folder, I cloned the meta-atmel layer that I
> referred to above.  I changed my bblayers.conf to include the meta-
> atmel layer.  When I bitbake linux-yocto, here's what I see for my
> build configuration:
> >
> > Build Configuration:
> > BB_VERSION        = "1.16.0"
> > TARGET_ARCH       = "arm"
> > TARGET_OS         = "linux-gnueabi"
> > MACHINE           = "qemuarm"
> > DISTRO            = "poky"
> > DISTRO_VERSION    = "1.3"
> > TUNE_FEATURES     = "armv5 dsp thumb arm926ejs"
> > TARGET_FPU        = "soft"
> > meta
> > meta-yocto
> > meta-yocto-bsp    = "<unknown>:<unknown>"
> > meta-atmel        = "yocto:80336b72180283bfd5cf5f674e8c1081deede72a"
> >
> > and it builds
> 3.4.11+git1+a201268353c030d9fafe00f2041976f7437d9386_1+8ee53c3b82ada3cd
> fd7d25f07d3975834ac9a9b2-r4.3.  From looking at the meta-atmel layer, I
> think it should be overriding the linux-yocto settings from the other
> layers.   What am I missing?
> 
> You need to set the preferred provider for your BSP to be your linux-
> custom recipe (or whatever you call it, you don't need to leave it
> called 'linux-yocto-custom').
> If you've done that, and are still seeing 3.4.x in the version number,
> chances are the recipe simply isn't overriding the right variables ..
> and a peek at the recipe would figure that out quickly.
> 
> Bruce

Bruce,

The preferred provider was setup for the BSP already.  But, with the pointers I tracked down the problems.  First, with the way everything was named in the layer I needed to call "bitbake linux-yocto-custom", not "bitbake linux-yocto".  Then I'd made a mistake in specifying the MACHINE in my local.conf file.  The machine I'm using from the meta-atmel layer is the at91sam9g25ek machine.  I'd correctly put the line "MACHINE ?= at91sam9g25ek" in my local.conf file.  However, I forgot to comment out the line earlier in the file that was setting the machine to qemuarm.  Once I got those two fixes sorted out, it's now building a 2.6.39 kernel like I wanted.

Thanks,
Bryan

> 
> >
> > Thanks,
> > Bryan
> > _______________________________________________
> > poky mailing list
> > poky at yoctoproject.org
> > https://lists.yoctoproject.org/listinfo/poky
> 
> 
> 
> --
> "Thou shalt not follow the NULL pointer, for chaos and madness await
> thee at its end"