Date: Thu, 18 Oct 2007 10:43:46 -0400 (EDT) From: Daniel Eischen <deischen@freebsd.org> To: Andrey Chernov <ache@nagual.pp.ru> Cc: current@freebsd.org, thierry@herbelot.com Subject: Re: No libc shared lib number bump ? Message-ID: <Pine.GSO.4.64.0710181038360.22190@sea.ntplx.net> In-Reply-To: <20071018091950.GB1546@nagual.pp.ru> References: <200710180835.18929.thierry@herbelot.com> <47170A83.6050607@FreeBSD.org> <20071018091950.GB1546@nagual.pp.ru>
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On Thu, 18 Oct 2007, Andrey Chernov wrote: > On Thu, Oct 18, 2007 at 09:25:55AM +0200, Kris Kennaway wrote: >> Thierry Herbelot wrote: >>> Hello, >>> I just saw on my -current box that some/most/all shared libraries seem not >>> to have been bumped when REL_7 was branched : >>> % ll /lib/libc.so* >>> -r--r--r-- 1 root wheel 1036012 Oct 15 23:33 /lib/libc.so.7 >>> % uname -a >>> FreeBSD YYY 8.0-CURRENT FreeBSD 8.0-CURRENT #1919: Wed Oct 17 20:39:59 >>> CEST 2007 XXX@YYY:/tank/files3/obj/tank/files1/src/sys/GENERIC i386 >> >> This is deliberate, there is no longer any need now or in the future (since >> symbol versioning now exists). > > I don't understand this thing well, since it is new. Is there some > howto's in symbol versioning exists for most common cases like that: > a) some new function/variable/struct added You just add the symbol to the appropriate symbol map for added interfaces. Keep in mind that added interfaces will have to be supported forever (*). Even if they are deprecated and removed later, you will still have to have compat versions hanging around libc (or whatever symbol versioned library they are in). (*) libc and other symbol versioned libraries may be bumped again in 8.0 to reset the numbering scheme back to 0 (libc.so.0). It was deemed to late in the game to do this for 7.0. > b) some existen function/variable/struct changed > (at this moment I am interesting especially in a) case since did it for > ctype) See http://people.freebsd.org/~deischen/symver/library_versioning.txt I just updated it, but it will probably need additional editing. -- DE
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