bcc: link with dynamic libbpf

[teknoraver]

Link bcc dynamically against libbpf. This reduces the size of libbcc.so
from 68 MB to 3 MB.
Backport some patches from upstream which are needed for the actual
dynamic linking.

Depends on openembedded/meta-openembedded#320

Signed-off-by: Matteo Croce [email protected]

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[kraj]

I am seeing build failures on aarch64/musl see http://sprunge.us/nAGWNa

[teknoraver]

Yes, this is expected as the PR depends on openembedded/meta-openembedded#320

Can you try both?

[kraj]

it is using both

[teknoraver]

OK, so it should be specific to musl. I tried only x86_64/libc and aarch64/libc6.

If all the other configurations work, we can exclude musl or stick with static linking

[kraj]

I think the issue I was facing was different, where a dependency was missing I have sent a patch for that.