Where is setsockopt() defined?

[Florian Weimer]

* Peng Yu via Libc-help:

> https://github.com/bminor/glibc/blob/21c3f4b5368686ade28d90d8c7d79c4c95c72c1b/socket/sys/socket.h#L215
>
> I see setsockopt() is declared above. But I don't find its source
> code. Where is it defined? Thanks.

It's in sysdeps/unix/sysv/linux/setsockopt.c.

Florian