Date: Wed, 28 May 2008 02:03:33 -0400 From: David Schultz <das@FreeBSD.ORG> To: d@delphij.net Cc: Maxim Sobolev <sobomax@FreeBSD.ORG>, src-committers@FreeBSD.ORG, re@FreeBSD.ORG, cvs-src@FreeBSD.ORG, cvs-all@FreeBSD.ORG, Xin LI <delphij@FreeBSD.ORG> Subject: Re: cvs commit: src/include string.h src/lib/libc/string Makefile.inc memchr.3 memrchr.c src/sys/sys param.h Message-ID: <20080528060333.GA4699@zim.MIT.EDU> In-Reply-To: <483C977F.20105@delphij.net> References: <200805272004.m4RK4SZt029194@repoman.freebsd.org> <483C7FF2.6000607@FreeBSD.org> <483C977F.20105@delphij.net>
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On Tue, May 27, 2008, Xin LI wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Maxim Sobolev wrote: > | Xin LI wrote: > |> delphij 2008-05-27 20:04:27 UTC > |> > |> FreeBSD src repository > |> > |> Modified files: (Branch: RELENG_6) > |> include string.h lib/libc/string > |> Makefile.inc memchr.3 sys/sys param.h Added > |> files: (Branch: RELENG_6) > |> lib/libc/string memrchr.c Log: > |> MFC: Add memrchr(3). > | > | I think this is not very good idea to MFC that into stable releases 6.x > | and 7.x. The reason is that configure scripts for some packages might > | detect up this API and enable it. Which means that some binary-only > | packages build for say 6.4 won't work on 6.3 and down. AFAIK, both > | forward and backward compatibility is required (or at least desired?) > | for stable branches. > | > | While it's "nice-to-have" feature, I see no pressing need to MFC this > | interface. > > I don't think so, perhaps I am wrong, but do we really want absolutely > no *new* features on -STABLE branches? ISTR that in prior discussions on symbol versioning, the consensus was that there's nothing wrong with adding new APIs in -STABLE branches, but of course apps that use the new features won't be backwards-compatible. By the way, one catch is that once you MFC symbols in the FBSD_1.1 namespace, any new symbols in the same library need to go in FBSD_1.2. We do guarantee that public namespaces do not change across stable branches. This is important for API-checking tools like appcert: even if you can't prevent problems like the one described previously, at least you have some assurance as to which versions of FreeBSD will run your app.home | help
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