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Re: BPF in linux-libre

From: Mathieu Othacehe
Subject: Re: BPF in linux-libre
Date: Wed, 17 Jun 2020 12:16:32 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.3 (gnu/linux)

Hello John,

> /tmp/guix-build-bcc-0.14.0.drv-0/source/src/cc/libbpf.c:694:58: error: 
> ‘BPF_PROG_TYPE_EXT’ undeclared (first use in this function); did you mean 
>    if (prog_type != BPF_PROG_TYPE_TRACING && prog_type != BPF_PROG_TYPE_EXT)
>                                                           ^~~~~~~~~~~~~~~~~
>                                                           BPF_PROG_TYPE_XDP
> The bcc github releases seem to indicate that bcc supports kernels up to
> 5.6.

Yes the issue here is that linux-libre-headers is in fact
linux-libre-headers-5.4.20 which is too old.

I tried to add linux-libre-headers-5.7 to the inputs. Even though it
comes first in CPLUS_INCLUDE_PATH, GCC is picking the old headers.

I'll have another look later.



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