On 10/28/20 8:06 PM, Hangbin Liu 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. nope. you need to be able to handle this. Ubuntu 20.10 was just released, and it has a version of libbpf. If you are going to integrate libbpf into other packages like iproute2, it needs to just work with that version. > > 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. This is going to be an on-going problem. iproute2 should work with whatever version of libbpf is installed on that system.
