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Date: Sat, 17 Sep 2005 13:56:10 -0600 (MDT)
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To: ttw@cobbled.net
From: "M. Warner Losh" <imp@bsdimp.com>
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Cc: freebsd-drivers@freebsd.org
Subject: Re: basic driver build environment
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In message: <20050917183132.GK6440@eyore.cobbled.net>
            n0g0013 <ttw@cobbled.net> writes:
: On 17.09-12:00, M. Warner Losh wrote:
: [ ... ]
: > : 	a.      cleaner config for building modules in random
: > : 	directory (thought '-I' to make would work but it doesn't)
: [ ... ]
: > When I'm developing a new module, I do the following:
: > 
: > setenv SYSDIR /path/to/freebsd/src/sys
: > make
: > 
: > The Makefile looks like
: > 
: > # Maybe have a .PATH here
: > 
: > KMOD=	     foo
: > SRCS=	     foo_a foo_b
: > 
: > .include <bsd.kmod.mk>
: > 
: > At work, we wrap setting SYSDIR in an include file, since our build
: > system knows about it.
: 
: i get the following (plus more similar) error/s
: 
: 	@/sys/bus.h:456:23: device_if.h: No such file or directory
: 
: even when setting the SYSDIR to "/usr/src/sys".  perhaps i'm missing
: something about the "wrap setting SYSDIR in an include file" to make
: it work???
: 
: if i understand correctly it's looking for the kernel architecture
: files from the kernel build (i.e in the 'obj' directory).
: 
: apologies if i'm being braindamaged here.

Add bus_if.h and device_if.h to your SRCS line.  They are generated.
If it is a pci device, you'll also need pci_if.h

Warner