From owner-freebsd-questions  Wed May  6 19:48:59 1998
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Message-ID: <19980506214844.A16251@emsphone.com>
Date: Wed, 6 May 1998 21:48:44 -0500
From: Dan Nelson <dnelson@emsphone.com>
To: Doug White <dwhite@resnet.uoregon.edu>,
        "Jason C. Wells" <jcwells@u.washington.edu>
Cc: FreeBSD Questions <freebsd-questions@FreeBSD.ORG>
Subject: Re: malloc.h vs. stdlib.h
References: <Pine.BSF.3.96.980506141940.896A-100000@s8-37-26.student.washington.edu> <Pine.BSF.3.96.980506165639.6723I-100000@gdi.uoregon.edu>
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In the last episode (May 06), Doug White said:
> On Wed, 6 May 1998, Jason C. Wells wrote:
> 
> > >Probably.  That way we're sure it's using our enhanced malloc
> > >instead of a local reimplementation.
> > 
> > I got confused here. When you say "use our enhanced malloc" do you mean
> > use stdlib.h?
> 
> Yes.

Actually, no.  To clarify, simply including a header file does not
normally (barring #define tricks) make the linker suddenly decide to
link in a different function.  <malloc.h> is included because other
OSes used to put the prototype for malloc() in there.  malloc() is now
prototyped in <stdlib.h>.

SYSV also defined mallopt() and mallinfo() in <malloc.h>, but those
functions aren't used anymore.  SCO 5.0.4 and DEC OSF/1 provide stubs
for these functions for backwards compatibility, but they do nothing.

	-Dan Nelson
	dnelson@emsphone.com

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