netdev - Re: [PATCH bpf] libbpf: fix missing _

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Date:   Thu, 18 Jul 2019 16:14:52 -0300
From:   Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
To:     Andrii Nakryiko <andrii.nakryiko@...il.com>
Cc:     Andrii Nakryiko <andriin@...com>, bpf <bpf@...r.kernel.org>,
        Networking <netdev@...r.kernel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Alexei Starovoitov <ast@...com>,
        Kernel Team <kernel-team@...com>, Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...il.com>
Subject: Re: [PATCH bpf] libbpf: fix missing __WORDSIZE definition

Em Thu, Jul 18, 2019 at 03:56:19PM -0300, Arnaldo Carvalho de Melo escreveu:
> I'll stop and replace my patch with yours to see if it survives all the
> test builds...

So, Alpine:3.4, the first image for this distro I did when I started
these builds, survives the 6 builds with gcc and clang with your patch:


[perfbuilder@...co linux-perf-tools-build]$ export PERF_TARBALL=http://192.168.124.1/perf/perf-5.2.0.tar.xz
[perfbuilder@...co linux-perf-tools-build]$ dm
   1  alpine:3.4                    : Ok   gcc (Alpine 5.3.0) 5.3.0, clang version 3.8.0 (tags/RELEASE_380/final)


[perfbuilder@...co linux-perf-tools-build]$ grep "+ make" dm.log/alpine\:3.4
+ make ARCH= CROSS_COMPILE= EXTRA_CFLAGS= -C /git/linux/tools/perf O=/tmp/build/perf
+ make ARCH= CROSS_COMPILE= EXTRA_CFLAGS= NO_LIBELF=1 -C /git/linux/tools/perf O=/tmp/build/perf
+ make ARCH= CROSS_COMPILE= EXTRA_CFLAGS= -C /git/linux/tools/perf O=/tmp/build/perf CC=clang
+ make ARCH= CROSS_COMPILE= EXTRA_CFLAGS= NO_LIBELF=1 -C /git/linux/tools/perf O=/tmp/build/perf CC=clang
+ make ARCH= CROSS_COMPILE= EXTRA_CFLAGS= LIBCLANGLLVM=1 -C /git/linux/tools/perf O=/tmp/build/perf CC=clang
+ make ARCH= CROSS_COMPILE= EXTRA_CFLAGS= LIBCLANGLLVM=1 -C /git/linux/tools/perf O=/tmp/build/perf
[perfbuilder@...co linux-perf-tools-build]$

Probably all the rest will go well, will let you know.

Daniel, do you mind if I carry this one in my perf/core branch? Its
small and shouldn't clash with other patches, I think. It should go
upstream soon:

Andrii, there are these others:

8dfb6ed300bf tools lib bpf: Avoid designated initializers for unnamed union members
80f7f8f21441 tools lib bpf: Avoid using 'link' as it shadows a global definition in some systems
d93fe741e291 tools lib bpf: Fix endianness macro usage for some compilers

If you could take a look at them at my tmp.perf/core branch at:

https://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git/log/?h=tmp.perf/core

I'm force pushing it now to replace my __WORDSIZE patch with yours, the
SHAs should be the 3 above and the one below.

And to build cleanly I had to cherry pick this one:

3091dafc1884 (HEAD -> perf/core) libbpf: fix ptr to u64 conversion warning on 32-bit platforms

Alpine:3.5 just finished:

   2 alpine:3.5                    : Ok   gcc (Alpine 6.2.1) 6.2.1 20160822, clang version 3.8.1 (tags/RELEASE_381/final)

- Arnaldo