[yocto] Build toolchain only (crosstools substitute?)

[Paul Eggleton]

Hi Michael,

On Mon, 02 May 2016 16:38:16 Michael Habibi wrote:
> I have been a few months out of researching Yocto, so I'm having trouble
> caching it all back in (a lot to absorb!). Excuse me if this is answered
> clearly in the documentation (I glanced around and I know you can build
> relocatable toolchains, etc, but I suppose I'm asking more of a
> philosophical question).
> 
> I have long-term plans to change our distribution at work over from a
> custom distribution to one built by Yocto - but this is a few months to a
> year out.
> 
> In the mean time, we need a new toolchain simply to update our glibc and
> gcc packages. I understand that yocto 2.1 can build gcc 5.3 w/ glibc 2.23
> support. I was wondering if this would be considered an appropriate
> exercise to use the yocto framework to build solely a toolchain to be used
> with a custom distribution (understanding that the custom distribution
> would have to be modified to source and use the new toolchain).
> 
> We typically use crosstools to generate the toolchain, but it is a bit
> outdated and only builds gcc 5.2 (which has some bugs that were fixed in
> 5.3). Essentially I want to use Yocto recipes as a substitute for
> crosstools-ng.

If you build (or download) our SDK that should give you what you need:

  http://www.yoctoproject.org/docs/2.1/sdk-manual/sdk-manual.html#sdk-building-an-sdk-installer

If it's just the toolchain you need you can ignore the bits about
the extensible SDK - the standard SDK is what you want. There's
some more explanatory stuff towards the top of that manual as well.

Cheers,
Paul

-- 

Paul Eggleton
Intel Open Source Technology Centre