[Buildroot] [PATCH 2/3 v3] linux: kconfig needs host-{flex, bison} to build the configurators

[Yann E. MORIN]

Thomas, All,

On 2018-08-14 16:21 +0200, Thomas Petazzoni spake thusly:
> On Fri,  3 Aug 2018 22:16:55 +0200, Yann E. MORIN wrote:
> > Take this opportunity to also drop the append-assignment as the first
> > assignment to LINUX_DEPENDENCIES.
> > 
> > Signed-off-by: "Yann E. MORIN" <yann.morin.1998 at free.fr>
> > Cc: Arnout Vandecappelle <arnout at mind.be>
> > Cc: Thomas Petazzoni <thomas.petazzoni at bootlin.com>
> 
> I am a bit confused. In this series, you suggest to make
> host-flex/host-bison dependencies of the configuration step of Linux.
> But in another series
> (http://patchwork.ozlabs.org/project/buildroot/list/?series=59260), you
> suggest to make flex/bison hard requirements of Buildroot, so that we
> don't have to build them.
> 
> Could you clarify in which direction you would like to go ?

This very series is about solving a technical problem, that
kconfig-based packages may have dependencies required even before
running the configurators.

On the other hand, that other series is about changing our requirements.

If we decide to require flex+bison, so in this series, only patch 2 can
be dropped.

> Also, if we
> make bison/flex hard requirements of Buildroot, I'd like to have a
> clear rule on whether we keep or not our host-bison/host-flex packages,
> and if we keep them, when they should be used vs. when the system
> bison/flex should be used.

My position is that we will always want to have our host flex and bison
to build packages that install things in host/, in staging/ or in
target/.

For the linux kernel and other kconfig-based packages, we don't care
which flex/bison are used, because the resulting binaries are not
installed, unless those packages also generate code eventually installed
in host/, staging/ or target/

Regards,
Yann E. MORIN.

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