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Date:   Mon, 14 Sep 2020 09:16:28 +0100
From:   Quentin Monnet <quentin@...valent.com>
To:     Yonghong Song <yhs@...com>, bpf@...r.kernel.org,
        netdev@...r.kernel.org
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>, kernel-team@...com
Subject: Re: [PATCH bpf-next] bpftool: fix build failure

On 14/09/2020 07:12, Yonghong Song wrote:
> When building bpf selftests like
>   make -C tools/testing/selftests/bpf -j20
> I hit the following errors:
>   ...
>   GEN      /net-next/tools/testing/selftests/bpf/tools/build/bpftool/Documentation/bpftool-gen.8
>   <stdin>:75: (WARNING/2) Block quote ends without a blank line; unexpected unindent.
>   <stdin>:71: (WARNING/2) Literal block ends without a blank line; unexpected unindent.
>   <stdin>:85: (WARNING/2) Literal block ends without a blank line; unexpected unindent.
>   <stdin>:57: (WARNING/2) Block quote ends without a blank line; unexpected unindent.
>   <stdin>:66: (WARNING/2) Literal block ends without a blank line; unexpected unindent.
>   <stdin>:109: (WARNING/2) Literal block ends without a blank line; unexpected unindent.
>   <stdin>:175: (WARNING/2) Literal block ends without a blank line; unexpected unindent.
>   <stdin>:273: (WARNING/2) Literal block ends without a blank line; unexpected unindent.
>   make[1]: *** [/net-next/tools/testing/selftests/bpf/tools/build/bpftool/Documentation/bpftool-perf.8] Error 12
>   make[1]: *** Waiting for unfinished jobs....
>   make[1]: *** [/net-next/tools/testing/selftests/bpf/tools/build/bpftool/Documentation/bpftool-iter.8] Error 12
>   make[1]: *** [/net-next/tools/testing/selftests/bpf/tools/build/bpftool/Documentation/bpftool-struct_ops.8] Error 12
>   ...
> 
> I am using:
>   -bash-4.4$ rst2man --version
>   rst2man (Docutils 0.11 [repository], Python 2.7.5, on linux2)
>   -bash-4.4$
> 
> Looks like that particular version of rst2man prefers to have a blank line
> after literal blocks. This patch added block lines in related .rst files
> and compilation can then pass.
> 
> Cc: Quentin Monnet <quentin@...valent.com>
> Fixes: 18841da98100 ("tools: bpftool: Automate generation for "SEE ALSO" sections in man pages")
> Signed-off-by: Yonghong Song <yhs@...com>


Hi Yonghong, thanks for the fix! I didn't see those warnings on my
setup. For the record my rst2man version is:

	rst2man (Docutils 0.16 [release], Python 3.8.2, on linux)

Your patch looks good, but instead of having blank lines at the end of
most files, could you please check if the following works?

------

diff --git a/tools/bpf/bpftool/Documentation/Makefile
b/tools/bpf/bpftool/Documentation/Makefile
index 4c9dd1e45244..01b30ed86eac 100644
--- a/tools/bpf/bpftool/Documentation/Makefile
+++ b/tools/bpf/bpftool/Documentation/Makefile
@@ -32,7 +32,7 @@ RST2MAN_OPTS += --verbose

 list_pages = $(sort $(basename $(filter-out $(1),$(MAN8_RST))))
 see_also = $(subst " ",, \
-       "\n" \
+       "\n\n" \
        "SEE ALSO\n" \
        "========\n" \
        "\t**bpf**\ (2),\n" \

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