Re: [Buildroot] [PATCH] support/bootlin-toolchains: don't depend on non-existent gcc version

[Thomas Petazzoni via buildroot <buildroot@buildroot.org>]

On Sun, 8 Oct 2023 11:32:38 +0200
Arnout Vandecappelle via buildroot <buildroot@buildroot.org> wrote:

> > However, when the toolchain is using the latest gcc version currently
> > known to Buildroot, this generates a dependency on a non-existing gcc
> > version. For example, a toolchain using gcc 13, the most recent version
> > currently known to Buildroot, this would generate a dependency against
> > BR2_ARCH_NEEDS_GCC_AT_LEAST_14, which does not exist yet.  
> 
>   That means, however, that if we add GCC 14, we need to remember to add the 
> condition to the Bootlin toolchains again... Of course, that can easily be 
> solved by regenerating them, but we don't currently do that when adding a new 
> GCC version.
> 
>   So really, I would feel more comfortable just adding the symbols for GCC 14 
> support already.

Yes, I think I agree too. Otherwise, we will never remember that we
need to re-generate the Bootlin toolchain files when the next
BR2_ARCH_NEEDS_GCC_AT_LEAST_xyz. And actually, it kind of makes sense
to have the BR2_ARCH_NEEDS_GCC_AT_LEAST_14 option available early on:
gcc 13.x toolchains should indeed say that they are not relevant if the
arch needs gcc 14. gcc 14.x may not exist yet, but the gcc 13.x
toolchain exists, and should say "I'm not good if your arch is so new
that it needs a new compiler than the one I provide".

Best regards,

Thomas
-- 
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com
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