From owner-freebsd-questions  Tue Jan  9 21:49:28 2001
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Date: Wed, 10 Jan 2001 16:50:43 +1100
From: "Geoffrey Crompton (RMIT Guest)" <ghcrompton@gecko.eric.net.au>
To: Matthew Emmerton <matt@gsicomp.on.ca>
Cc: FreeBSD-Questions <freebsd-questions@FreeBSD.ORG>
Subject: Re: programming in freebsd related questions
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References: <20010110121911.A29635@gecko.eric.net.au> <Pine.BSF.4.21.0101092020020.53322-100000@xena.gsicomp.on.ca>
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On Tue, Jan 09, 2001 at 08:25:38PM -0500, Matthew Emmerton wrote:
> On Wed, 10 Jan 2001, Geoffrey Crompton (RMIT Guest) wrote:
> 
> >   When I #include things like sys/socket.h and netinet/in.h, I get heaps
> > of compiler errors, unless I do a #include <sys/types.h> before I #include
> > the others. Why is that?
> 
> Because that's the way it is.  <sys/types.h> defines many things that are
> used by other header files, such as <sys/socket.h> and <netinet/in.h>, so
> you have to include it first, as you've found out.  Depending on your
> program, you may need to include <sys/param.h> _instead of_
> <sys/types.h>. (You can't include both.)

  Is there a design reason for why those files (<sys/socket.h>, <netinet/in.h>)
don't #include <sys/types.h>? Or is that just that way it is?

  Does <sys/param.h> define a superset of what is defined in <sys/types.h>?

  Thanks,
  Geoff Crompton


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