From owner-cvs-all  Tue Sep 11 13:15:20 2001
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From: Bruce Evans <bde@zeta.org.au>
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To: "Brian F. Feldman" <green@FreeBSD.org>
Cc: Mark Murray <mark@grondar.za>, Peter Wemm <peter@FreeBSD.org>,
	<cvs-committers@FreeBSD.org>, <cvs-all@FreeBSD.org>
Subject: Re: cvs commit: src/sys/kern subr_prf.c src/sys/sys systm.h 
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On Tue, 11 Sep 2001, Brian F. Feldman wrote:

> Bruce Evans <bde@zeta.org.au> wrote:
> > On Mon, 10 Sep 2001, Brian F. Feldman wrote:
> > > Agreed.  Peter's original comment was absolutely justified.  The _ONLY_ case
> > > I can see this possibly being even moderately alright is if it is somehow
> > > done in a way that makes it act like a macro definition and can be
> > > #undefined or (called)() in one of the standard ways.
> >
> > Disagreed.  This seems like a normal optimization to me.  It's like
> > replacing strlen("foo") by 3.
>
> So you don't take issues at all with GCC not only implementing the C
> language per se but implementing actual C library routines, no matter how
> standard they may be, in the compilation step?

Right.  The C library is part of the C language (in the hosted case).
I would only disagree with the compiler implementing the library in a
way that significantly constrains the implementation of the parts of
the library that the compiler doesn't implement.  E.g., it would be
bad for it to convert printf("%s", "a") into builtin inline
putc('a', stdin) where stdin is only compatible with Linux's stdio.h
:-).  OTOH, it already has to constrain the library for very
machine-dependent things like varargs.

Bruce


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