Using XDP with clang/llvm version 9

[maharishib]

Hi,
My XDP code is running perfectly with clang/llvm version < 8. When compiling using v9, I get the following error:
0 maps not supported in current map section!
Error fixing up map structure, incompatible struct bpf_elf_map used?
Error fetching ELF ancillary data!

I need to use v9 as bpf_spin_locks are not supported by clang/llvm version < 8 due to some BTF annotation issue.

[mihaibudiu]

I frankly do not think this is a problem with our compiler; here are other people complaining about a similar problem: https://forums.whirlpool.net.au/archive/9znlnrk9
The error message is somewhere in iproute.

[maharishib]

OK Thanks

[mihaibudiu]

On the other hand, we are using some hand-crafted bpf headers, which may become incompatible with the kernel headers if they change. This has been a long-standing problem. I understand that there may be better solutions in newer kernel versions.