I've been working on a Routing Protocol and looking at legacy code for different routing protocols. I constantly find different macros where I it is very hard to find it in the header files because they include ~20-50 headers. Besides looking up the macro on the Internet is there any way by finding their definitions in the man pages?
For instance: INADDR_ALLHOSTS_GROUP macro which I eventually found in "netinet/in.h" but the man page never discussed the macro. Is there a way to use the man pages when you are trying to search for such things or would I need to go another way?