Building nginx with TCP_FASTOPEN enabled

[mastercan]

Lukas Tribus Wrote:
> Don't upgrade libc because of this (it will mess your system up).
> 
> Just define it manually when compiling nginx by passing it to the
> compiler:
> -DTCP_FASTOPEN=23
> 

Which command accepts the -D flag?
Where exactly do I set this option?

Thanks in advance

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,252447,252460#msg-252460