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Message-ID: <CAEf4Bzb2NYxCG69s1f9NzFbLr+ZO6-ZWYyFGvFJFM_HUOX5YLA@mail.gmail.com>
Date:   Thu, 16 Jan 2020 10:56:43 -0800
From:   Andrii Nakryiko <andrii.nakryiko@...il.com>
To:     Toke Høiland-Jørgensen <toke@...hat.com>
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        Andrii Nakryiko <andriin@...com>,
        Doug Ledford <dledford@...hat.com>,
        Jason Gunthorpe <jgg@...pe.ca>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        John Fastabend <john.fastabend@...il.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Shuah Khan <shuah@...nel.org>,
        Networking <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        linux-rdma@...r.kernel.org,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        clang-built-linux@...glegroups.com
Subject: Re: [PATCH bpf-next v3 03/11] selftests: Pass VMLINUX_BTF to
 runqslower Makefile

On Thu, Jan 16, 2020 at 5:22 AM Toke Høiland-Jørgensen <toke@...hat.com> wrote:
>
> From: Toke Høiland-Jørgensen <toke@...hat.com>
>
> Add a VMLINUX_BTF variable with the locally-built path when calling the
> runqslower Makefile from selftests. This makes sure a simple 'make'
> invocation in the selftests dir works even when there is no BTF information
> for the running kernel. Because of the previous changes to the runqslower
> Makefile, if no locally-built vmlinux file exists, the wildcard search will
> fall back to the pre-defined paths (and error out if they don't exist).
>
> Fixes: 3a0d3092a4ed ("selftests/bpf: Build runqslower from selftests")
> Signed-off-by: Toke Høiland-Jørgensen <toke@...hat.com>
> ---
>  tools/testing/selftests/bpf/Makefile |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
> index 246d09ffb296..30d0e7a813d2 100644
> --- a/tools/testing/selftests/bpf/Makefile
> +++ b/tools/testing/selftests/bpf/Makefile
> @@ -127,7 +127,7 @@ $(OUTPUT)/test_stub.o: test_stub.c
>  .PHONY: $(OUTPUT)/runqslower
>  $(OUTPUT)/runqslower: force
>         $(Q)$(MAKE) $(submake_extras) -C $(TOOLSDIR)/bpf/runqslower           \
> -                   OUTPUT=$(CURDIR)/tools/
> +                   OUTPUT=$(CURDIR)/tools/ VMLINUX_BTF=$(abspath ../../../../vmlinux)

we can do "first match" wildcard trick here instead

>
>  BPFOBJ := $(OUTPUT)/libbpf.a
>
>

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