Trying to locate file gif.h and others

[Michael C]

Hi,

I haved searched the whole src tree and different codelines but cannot 
locate this file (amongst others).

This file is user included from the directory of the source but is not 
physically there.

There is another file with a similar name in the same directory (in_gif.h) 
and also other directories (if_gif.h & in6_gif.h).

My feeling is that one of these other files get renamed to gif.h depending 
on the build being performed. My problem is that not being familiar with the 
build system I don't know where to look to confirm my suspicions or not.

Can anyone provide information to help me please, another file I can not 
find is bridge.h!

I am not trying to compile OpenBSD, just looking at certain subsystems. I 
understand that everything works in regards to build.

Thanks
Michael