Re: [PATCH] bpf: Hoise pahole version checks into Kconfig

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On Wed, Jan 13, 2021 at 02:38:27PM -0800, Andrii Nakryiko wrote:
> Hm.. Just saw Linus proposing using $(error-if) in Kconfig for an
> unrelated issue ([0]). If we can make this work, then it would catch
> such issue early on, yet won't have any downsides of hiding
> CONFIG_DEBUG_INFO_BTF if pahole is too old. WDYT?
> 
>   [0] https://lore.kernel.org/lkml/CAHk-=wh-+TMHPTFo1qs-MYyK7tZh-OQovA=pP3=e06aCVp6_kA@xxxxxxxxxxxxxx/

Yes, I think that would be exactly what we want because DEBUG_INFO_BTF
could cause the build to error if PAHOLE_VERSION is not >= 116. I will
try to keep an eye on that thread to see how it goes then respin this
based on anything that comes from it.

Cheers,
Nathan



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