On 8 Nov 1997, Tony Tam wrote:

> Can someone please explain to me the significance of
> 
> __P in the source code of NetBSD
> 
> one example is in the function declarations of Netinet/tcp_var.h at the 
> bottom of the file:
> 
> struct tcpiphdr *
> 	 tcp_template __P((struct tcpcb *));
> 
> What is the __P?

That's a portability hack, so that platforms that have old C compilers,
that can't take all the newer type declarations in the function argument,
can easily just turn them off and compile anyways.

> 
> Thanks,
> Tony
> 
> 

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