[Buildroot] [PATCH 04/10] toolchain/external: add choice to select 'AT_LEAST_XXX' header version

[Yann E. MORIN <yann.morin.1998@free.fr>]

Thomas P, All,

On 2014-02-17 11:30 +0100, Thomas Petazzoni spake thusly:
> On Mon, 17 Feb 2014 09:07:29 +0100, Thomas De Schampheleire wrote:
> 
> > > I'm not sure I entirely grok your comment. This choice is only visible
> > > for external toolchains, not for the internal backend, so there is not
> > > two choices to set the kernel headers version.
> > 
> > True, but suppose the user did make the externel toolchain himself,
> > for example with crosstool-ng. While creating the toolchain, he did
> > get the question of which headers to use already, so he/she may think
> > 'Huh? Why do I have to choose it again, and what will happen if I
> > select a newer version here?"
[--SNIP--]
> > Maybe you could also add that if the user is unsure about the exact
> > version, it's 'safer' to specify an older version than a newer one.
> > And maybe a way of determining the header version used in a toolchain,
> > in case the user does not know it.
> 
> We should simply have a check that ensures the selection is correct.

Yes, I already added such a check later after sending the series. It
will be part of the next submission.

Basically, I check that the specified headers version is no more recent
than the one actually used in the toolchain.

Regards,
Yann E. MORIN.

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