Re: [PATCH bpf-next v3] bpftool: fix build failure

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On Mon, Sep 14, 2020 at 3:20 PM Andrii Nakryiko
<andrii.nakryiko@xxxxxxxxx> wrote:
>
> On Mon, Sep 14, 2020 at 11:31 AM Yonghong Song <yhs@xxxxxx> 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$
> >
> > The Makefile generated final .rst file (e.g., bpftool-cgroup.rst) looks like
> >   ...
> >       ID       AttachType      AttachFlags     Name
> >   \n SEE ALSO\n========\n\t**bpf**\ (2),\n\t**bpf-helpers**\
> >   (7),\n\t**bpftool**\ (8),\n\t**bpftool-btf**\
> >   (8),\n\t**bpftool-feature**\ (8),\n\t**bpftool-gen**\
> >   (8),\n\t**bpftool-iter**\ (8),\n\t**bpftool-link**\
> >   (8),\n\t**bpftool-map**\ (8),\n\t**bpftool-net**\
> >   (8),\n\t**bpftool-perf**\ (8),\n\t**bpftool-prog**\
> >   (8),\n\t**bpftool-struct_ops**\ (8)\n
> >
> > The rst2man generated .8 file looks like
> > Literal block ends without a blank line; unexpected unindent.
> >  .sp
> >  n SEEALSOn========nt**bpf**(2),nt**bpf\-helpers**(7),nt**bpftool**(8),nt**bpftool\-btf**(8),nt**
> >  bpftool\-feature**(8),nt**bpftool\-gen**(8),nt**bpftool\-iter**(8),nt**bpftool\-link**(8),nt**
> >  bpftool\-map**(8),nt**bpftool\-net**(8),nt**bpftool\-perf**(8),nt**bpftool\-prog**(8),nt**
> >  bpftool\-struct_ops**(8)n
> >
> > Looks like that particular version of rst2man prefers to have actual new line
> > instead of \n.
> >
> > Since `echo -e` may not be available in some environment, let us use `printf`.
> > Format string "%b" is used for `printf` to ensure all escape characters are
> > interpretted properly.
> >
> > Cc: Quentin Monnet <quentin@xxxxxxxxxxxxx>
> > Suggested-by: Andrii Nakryiko <andrii.nakryiko@xxxxxxxxx>
> > Fixes: 18841da98100 ("tools: bpftool: Automate generation for "SEE ALSO" sections in man pages")
> > Signed-off-by: Yonghong Song <yhs@xxxxxx>
> > ---
>
> Acked-by: Andrii Nakryiko <andriin@xxxxxx>

Applied. Thanks



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