Re: [PATCH bpf-next] selftests/bpf: fix selftests build with old system-wide headers

From:   Andrii Nakryiko <andrii@kernel.org>
Date:   Wed, 16 Jun 2021 21:14:46 -0700

migrate_reuseport.c selftest relies on having TCP_FASTOPEN_CONNECT defined in
system-wide netinet/tcp.h. Selftests can use up-to-date uapi/linux/tcp.h, but
that one doesn't have SOL_TCP. So instead of switching everything to uapi
header, add #define for TCP_FASTOPEN_CONNECT to fix the build.

Acked-by: Kuniyuki Iwashima <redacted>

Thank you!