FWIW, sadly, Mac OS X does flirt with varargs. These seem to have
crept in via the Mach back door. I don't believe that they are
actually used anywhere, but the varargs headers are there. Our
version of the KAME stack must have pre-dated the intro of this,
because the 'bsd' side of the code is varargs-free (so far, at any
rate).
Regards,
Justin
On Sunday, August 26, 2001, at 11:36 PM, Julian Elischer wrote:
> Jun-ichiro itojun Hagino wrote:
>>
>>> I have still not heard any reason for the varargs here..
>>> except "it's needed for portability"..
>>> portability with WHO?
>>
>> portability with other *BSD projects (NetBSD, OpenBSD,
>> BSD/OS, MacOSX
>> maybe).
>
> are you suggesting that BSD/OS and MacOS/X have varargs?
> Varargs are inherrently incompatible with switch tables
> unless there is a format key (e.g. as in printf())
> (I think NetBSD must have been crazy when they did it)
>
>>
>>> BSD4.4 certainly didn't have varargs there....
>>
>> 4.4BSD did not have prototype in protosw.h, there's no
>> varargs either.
>> freebsd added prototype on its own, and thus change/broke
>> some of the
>> existing xx{in,out}put prototypes. netbsd/openbsd added
>> varargs, to
>> keep existing practices in 4.4BSD.
>
> they were too lazy to fix the problems.
>
> I agree that we should fix protosw if it is deficient, but not
> with varargs.!
>
>> see it for yourself.
>
>> http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/sys/protosw.h
>> http://www.openbsd.org/cgi-bin/cvsweb/src/sys/sys/protosw.h
>> http://cvsweb.netbsd.org/bsdweb.cgi/syssrc/sys/sys/protosw.h
>
>
>
> so what's wrong with adding a
>
> #ifdef USE_VARARGS
> xxx_input(struct mbuf *m, va_alist)
> #else
> xxx_input(struct mbuf *m, int offset)
> #endif
>
> at least we'd get rid of the d*mned warning messages!
> Are you not aware that most of the warning messages for a normal
> kernel compile come from the KAME code? I am on compile number 157
> for the KSE code. (in 3 weeks)
>
> I must look at those messages EVERY compile to check that they are
> not hiding a
> real
> problem there when I change things.
>
> It is damaging to your reputation, and it certainly hurts my
> professional
> reputation to have people say "yes but FreeBSD kernel has lived for
> over a year with the same warning messages in a simple kernel compile".
> I HAVE had people say something like this to me.
>
> (The second worst module is acpi from intel)
>
>
>> itojun
>
> --
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> | ( OZ ) \___ ___ | country !
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> v
>
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---
Justin C. Walker, Curmudgeon-At-Large *
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