Re: [PATCH net-next v1] samples/bpf: Partially fixes the bpf.o build

[Daniel Borkmann]

On 01/26/2018 09:30 AM, Mickaël Salaün wrote:
> On 26/01/2018 03:16, Alexei Starovoitov wrote:
>> On Fri, Jan 26, 2018 at 01:39:30AM +0100, Mickaël Salaün wrote:
>>> Do not build lib/bpf/bpf.o with this Makefile but use the one from the
>>> library directory.  This avoid making a buggy bpf.o file (e.g. missing
>>> symbols).
>>
>> could you provide an example?
>> What symbols will be missing?
>> I don't think there is an issue with existing Makefile.
> 
> You can run this commands:
> make -C samples/bpf; nm tools/lib/bpf/bpf.o > a; make -C tools/lib/bpf;
> nm tools/lib/bpf/bpf.o > b; diff -u a b
> 
> Symbols like bzero and sys_bpf are missing with the samples/bpf
> Makefile, which makes the bpf.o shrink from 25K to 7K.

I've applied it to bpf-next, thanks Mickaël!