Date: Sat, 1 Feb 1997 17:00:32 -0700 (MST) From: Terry Lambert <terry@lambert.org> To: bde@zeta.org.au (Bruce Evans) Cc: bde@zeta.org.au, proff@iq.org, hackers@freebsd.org Subject: Re: #include dependencies Message-ID: <199702020000.RAA06935@phaeton.artisoft.com> In-Reply-To: <199702010949.UAA17084@godzilla.zeta.org.au> from "Bruce Evans" at Feb 1, 97 08:49:03 pm
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> >> Most of the headers are only used in the kernel. Kernel sources > > >I'm aware of this, this is why you see a number of #ifndef KERNEL. > > #ifndef KERNEL in kernel-only headers is nonsense (unless it is used > to control a #warning or #error). Or to prevent a structure definition plus a kvm grovelling library being misconstrued as an interrface. 8-). > After living for a while in an environment with sloppy headers, > programs depend on things like obtaining declarations related to > ANSI time functions by including <net/if.h>. I happen to agree with you on this one... > New interfaces should use sysctl() and be designed better to only > pass the parts of the kernel struct of interest to applications > across the interface. You happen to disagree with you on this one... 8-). Use of the "#ifndef" makes sysctl a better bet. Not using it makes sysctl a rule which programmers will feel free to ignore. Regards, Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers.
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