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From: "Toke Høiland-Jørgensen" <toke@redhat.com>
To: Kumar Kartikeya Dwivedi <memxor@gmail.com>, bpf@vger.kernel.org
Subject: Re: [PATCH bpf v2] samples: bpf: Fix vmlinux.h generation for XDP samples
Date: Tue, 28 Sep 2021 15:44:49 +0200	[thread overview]
Message-ID: <874ka4ke5q.fsf@toke.dk> (raw)
In-Reply-To: <20210928054608.1799021-1-memxor@gmail.com>

Kumar Kartikeya Dwivedi <memxor@gmail.com> writes:

> Generate vmlinux.h only from the in-tree vmlinux, and remove enum
> declarations that would cause a build failure in case of version
> mismatches.
> There are now two options when building the samples:
> 1. Compile the kernel to use in-tree vmlinux for vmlinux.h
> 2. Override VMLINUX_BTF for samples using something like this:
>    make VMLINUX_BTF=/sys/kernel/btf/vmlinux -C samples/bpf
> This change was tested with relative builds, e.g. cases like:
>  * make O=build -C samples/bpf
>  * make KBUILD_OUTPUT=build -C samples/bpf
>  * make -C samples/bpf
>  * cd samples/bpf && make
> When a suitable VMLINUX_BTF is not found, the following message is
> printed:
> /home/kkd/src/linux/samples/bpf/Makefile:333: *** Cannot find a vmlinux
> for VMLINUX_BTF at any of "  ./vmlinux", build the kernel or set
> VMLINUX_BTF variable.  Stop.
> Cc: Toke Høiland-Jørgensen <toke@redhat.com>
> Fixes: 384b6b3bbf0d (samples: bpf: Add vmlinux.h generation support)
> Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>

Acked-by: Toke Høiland-Jørgensen <toke@redhat.com>

  reply	other threads:[~2021-09-28 13:44 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-28  5:46 [PATCH bpf v2] samples: bpf: Fix vmlinux.h generation for XDP samples Kumar Kartikeya Dwivedi
2021-09-28 13:44 ` Toke Høiland-Jørgensen [this message]
2021-09-29  0:35   ` Andrii Nakryiko

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