Re: [PATCHv2 iproute2-next 0/5] iproute2: add libbpf support

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On Wed, Oct 28, 2020 at 7:06 PM Hangbin Liu <haliu@xxxxxxxxxx> wrote:
>
> On Wed, Oct 28, 2020 at 05:02:34PM -0600, David Ahern wrote:
> > fails to compile on Ubuntu 20.10:
> >
> > root@u2010-sfo3:~/iproute2.git# ./configure
> > TC schedulers
> >  ATM  yes
> >  IPT  using xtables
> >  IPSET  yes
> >
> > iptables modules directory: /usr/lib/x86_64-linux-gnu/xtables
> > libc has setns: yes
> > SELinux support: yes
> > libbpf support: yes
> > ELF support: yes
> > libmnl support: yes
> > Berkeley DB: no
> > need for strlcpy: yes
> > libcap support: yes
> >
> > root@u2010-sfo3:~/iproute2.git# make clean
> >
> > root@u2010-sfo3:~/iproute2.git# make -j 4
> > ...
> > /usr/bin/ld: ../lib/libutil.a(bpf_libbpf.o): in function `load_bpf_object':
> > bpf_libbpf.c:(.text+0x3cb): undefined reference to
> > `bpf_program__section_name'
> > /usr/bin/ld: bpf_libbpf.c:(.text+0x438): undefined reference to
> > `bpf_program__section_name'
> > /usr/bin/ld: bpf_libbpf.c:(.text+0x716): undefined reference to
> > `bpf_program__section_name'
> > collect2: error: ld returned 1 exit status
> > make[1]: *** [Makefile:27: ip] Error 1
> > make[1]: *** Waiting for unfinished jobs....
> > make: *** [Makefile:64: all] Error 2
>
> You need to update libbpf to latest version.

Why not using libbpf from submodule?

>
> But this also remind me that I need to add bpf_program__section_name() to
> configure checking. I will see if I missed other functions' checking.
>
> Thanks
> Hangbin
>



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