[Buildroot] Creating an external toolchain [was: Re: Antw:Re: Antw: Antw:Re: libgcc build fails on Fedora15]

[Thomas De Schampheleire]

Hi,

On Wed, Sep 28, 2011 at 8:05 AM, Arnout Vandecappelle <arnout at mind.be> wrote:
>
> On Monday 26 September 2011 16:55:09, MARCEL JANSSEN wrote:
>
>> I just have one question which probably belongs in the faq (I may have
>
>> missed something as well). I can't yet figure out how to build the output
>
>> for different devices without recompiling the whole toolchain. I have
>
>> several different images which are just a little different in the sense
>
>> that they all have the same kernel but some different packages. It would
>
>> be great if I could just switch between configs and don't have to
>
>> recompile the whole toolchain again or even shared packages between those
>
>> configs.
>
> Buildroot supports an external toolchain, but it isn't easy to create one.
> The easiest is to use a crosstool-NG toolchain: build it, install it in some
> central place, and use it as an external toolchain from buildroot.
>
> It would be nice if buildroot also supported creation of an external
> toolchain (based on an internal toolchain config). The toolchain is
> currently built in output/host/usr/... and is not relocatable, so it's
> difficult to share it between different buildroot builds.

The non-relocatability of the buildroot toolchain is a problem I am
experiencing as well. Specifying LD_LIBRARY_PATH works as a
workaround, but is not a proper solution. The issue was addressed in
following mail thread:
http://lists.busybox.net/pipermail/buildroot/2011-September/045407.html

Best regards,
Thomas