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SubjectRe: [PATCH bpf-next 02/11] samples: bpf: makefile: fix cookie_uid_helper_example obj build
On Fri, Sep 13, 2019 at 08:48:37PM +0000, Yonghong Song wrote:
>On 9/10/19 11:38 AM, Ivan Khoronzhuk wrote:
>> Don't list userspace "cookie_uid_helper_example" object in list for
>> bpf objects.
>> per_socket_stats_example-opjs is used to list additional dependencies
>> for user space binary from hostprogs-y list. Kbuild system creates
>> rules for objects listed this way anyway and no need to worry about
>> this. Despite on it, the samples bpf uses logic that hostporgs-y are
>> build for userspace with includes needed for this, but "always"
>> target, if it's not in hostprog-y list, uses CLANG-bpf rule and is
>> intended to create bpf obj but not arch obj and uses only kernel
>> includes for that. So correct it, as it breaks cross-compiling at
>> least.
>The above description is a little tricky to understand.
>Maybe something like:
> 'always' target is for bpf programs.
> 'cookie_uid_helper_example.o' is a user space ELF file, and
> covered by rule `per_socket_stats_example`.
> Let us remove `always += cookie_uid_helper_example.o`,
> which avoids breaking cross compilation due to
> mismatched includes.

Yes, looks better, thanks.

Ivan Khoronzhuk

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