[Buildroot] problems building w/ external glibc toolchain

[Buildroot] problems building w/ external glibc toolchain

[Bryce Schober]

I've built an external glibc toolchain using crosstool-ng with old
(2.6.29.6) linux kernel headers. I've already tested that the toolchain
basically works, but buildroot fails just after building cross-depmod26.
I've build with the --debug=v option, and it seems like it's trying to go
fetch kernel headers, but doesn't know the kernel version. Looking into the
configs and makefiles, it seems that the config variables for the kernel
header versions are unsettable when using an external toolchain, yet
buildroot is going out and trying to download them without knowing the
version, eventually resulting in:

Must remake target `/home/bschober/buildroot-2010.02/dl/linux-..tar.bz2'.

Which is clearly never going to work. You'll noticed that this happened
using buildroot-2010.02, but I've reproduced the same behavior on 2010.11
and need to use the old version because I need Xorg 7.4.

<><  <><  <><
Bryce Schober
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[Buildroot] problems building w/ external glibc toolchain

[Thomas Petazzoni]

Hello Bryce,

On Fri, 28 Jan 2011 16:23:30 -0800
Bryce Schober <bryce.schober@gmail.com> wrote:

> I've built an external glibc toolchain using crosstool-ng with old
> (2.6.29.6) linux kernel headers. I've already tested that the toolchain
> basically works, but buildroot fails just after building cross-depmod26.
> I've build with the --debug=v option, and it seems like it's trying to go
> fetch kernel headers, but doesn't know the kernel version. Looking into the
> configs and makefiles, it seems that the config variables for the kernel
> header versions are unsettable when using an external toolchain, yet
> buildroot is going out and trying to download them without knowing the
> version, eventually resulting in:
> 
> Must remake target `/home/bschober/buildroot-2010.02/dl/linux-..tar.bz2'.
> 
> Which is clearly never going to work. You'll noticed that this happened
> using buildroot-2010.02, but I've reproduced the same behavior on 2010.11
> and need to use the old version because I need Xorg 7.4.

Sounds strange. Could you post : your Buildroot .config, the complete
build log, and the list of commands you're using to trigger the
problem ?

Thanks,

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