Date: Mon, 21 Aug 1995 23:08:29 +0800 (WST) From: Peter Wemm <peter@haywire.dialix.com> To: Bruce Evans <bde@zeta.org.au> Cc: bde@zeta.org.au, CVS-commiters@freefall.FreeBSD.org, cvs-lib@freefall.FreeBSD.org, pst@freebsd.org Subject: Re: cvs commit: src/lib/libc/net gethostbydns.c res_debug.c res_init.c res_mkquery.c res_query.c res_send.c Message-ID: <Pine.SV4.3.91.950821221014.25041H-100000@haywire.DIALix.COM> In-Reply-To: <199508211323.XAA26477@godzilla.zeta.org.au>
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On Mon, 21 Aug 1995, Bruce Evans wrote: > >Question: should libresolv become a no-op, as it currently does the same > >thing as libc/net/get* and libc/net/res*; > > I'm not qualified to decide this. I seem to remember Garrett saying that > libresolv should go away. libresolv isn't referenced by any Makefile in > /usr/src. > > >OR: > >should the libc stuff have the #define DEBUG removed so that the libc > >version does not have the debugging printf()'s that things like dig(1) > >need, while libresolv does... (so dig links with libresolv) > > >I suspect it was working the second way before, in which case I've broken > >the distinction between the two libraries.. > > I think you actually broke RES_DEBUG. Previously there was no DEBUG > flag in libc/net/*, although libresolv/Makefile defines it. The support > for RES_DEBUG should continue to to be independent of local debugging > flags. Hmm. It looks like the original 4.4BSD-Lite1 version had #ifdef DEBUG code disabled in the libc/net, while having a seperately compiled copy in libresolv that had the #ifdef DEBUG code enabled.. Theoretically, the libc/net stuff is faster, because normal code doesn't define RES_DEBUG. I dont think I broke RES_DEBUG in libc, because res_config.h #defined DEBUG as committed, and dig was definately working on the resolver in libc. For things like 'dig' and 'nslookup' where lots of the output actually comes from enabling RES_DEBUG, they were linked with -lresolv. I think that when Paul Traina imported 4.9.3-beta9, he must have disabled the distinction between the two libraries. My thoughts - either: libresolv goes away, and libc has the extra DEBUG code enabled (adding code and data space to libc); or: libresolv contains the resolver with RES_DEBUG enabled, and the libc resolver does not. Paul? Garrett? > Bruce Cheers, -Peter
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