> I don't know about every OS, but it is POSIX, and works on the systems I
> have here (Linux, FreeBSD and Solaris).
>
> I looked at the autoconf docs again but couldn't find a test for
> specific defines like this. If there is one I'd agree that we should use
> it.
Well Windows does support it as well. I'm just wondering more about some of
the less-common OSes (IRIX, VMS, etc.)

I did some googling, and I found a change log for Apache (1.2.5) and it
says:
  *) Don't disable Nagle algorithm if system doesn't have TCP_NODELAY.
     [Marc Slemko and Roy Fielding]

So that to me makes it sound like there are some OSes that do not support
this.

But really, I don't see any need for an autoconf check. Just enclose the
code in #ifdef TCP_NODELAY. If that is defined, then TCP_NODELAY exists. If
it is not defined, then TCP_NODELAY does not exist. That seems like a
workable solution to me...

Dominick Meglio
Received on 2004-03-21