netdev - Re: iproute2: Debian 9 No ELF support

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Date:   Mon, 17 Sep 2018 11:57:12 +0200
From:   Daniel Borkmann <daniel@...earbox.net>
To:     yuzibode@....com
Cc:     netdev@...r.kernel.org
Subject: Re: iproute2: Debian 9 No ELF support

On 09/17/2018 10:23 AM, Bo YU wrote:
> Hello,
> I have followed the instructions from:
> 
> https://cilium.readthedocs.io/en/latest/bpf/#bpftool
> 
> to test xdp program.
> But i can not enable elf support.
> 
> ./configure --prefix=/usr
> ```output
> TC schedulers
> ATM    no
> 
> libc has setns: yes
> SELinux support: no
> ELF support: no
> libmnl support: yes
> Berkeley DB: yes
> need for strlcpy: yes
> libcap support: yes
> ```
> And i have installed libelf-dev :
> ```output
> sudo apt show libelf-dev
> Package: libelf-dev
> Version: 0.168-1
> Priority: optional
> Section: libdevel
> Source: elfutils
> Maintainer: Kurt Roeckx <kurt@...ckx.be>
> Installed-Size: 353 kB
> Depends: libelf1 (= 0.168-1)
> Conflicts: libelfg0-dev
> Homepage: https://sourceware.org/elfutils/
> Tag: devel::library, role::devel-lib
> ```
> 
> And gcc version:
> gcc version 6.3.0 20170516 (Debian 6.3.0-18+deb9u1)
> 
> uname -a:
> Linux debian 4.18.0-rc1+ #2 SMP Sun Jun 24 16:53:57 HKT 2018 x86_64 GNU/Linux
> 
> Any help is appreciate.

Debian's official iproute2 packaging build says 'libelf-dev' [0], and having
libelf-dev installed should work ...

  [...]
  Build-Depends: bison,
               debhelper (>= 10~),
               flex,
               iptables-dev,
               libatm1-dev,
               libcap-dev,
               libdb-dev,
               libelf-dev,
               libmnl-dev,
               libselinux1-dev,
               linux-libc-dev,
               pkg-config,
               po-debconf,
               zlib1g-dev,
  [...]

Did you ran into this one perhaps [1]? Do you have zlib1g-dev installed?

  [0] https://salsa.debian.org/debian/iproute2/blob/master/debian/control
  [1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=885071