Date: Mon, 07 Jan 2013 15:32:21 +0000 From: Matthew Seaman <m.seaman@infracaninophile.co.uk> To: freebsd-questions@freebsd.org Subject: Re: Unreferenced Libraries? Message-ID: <50EAEA85.7020704@infracaninophile.co.uk> In-Reply-To: <kcelvs$bfe$1@ger.gmane.org> References: <kcelvs$bfe$1@ger.gmane.org>
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On 07/01/2013 14:27, Walter Hurry wrote: > 9.1-RELEASE on amd64. > > libchk reports the following libraries (among others) as unreferenced: > > /usr/lib/libBlocksRuntime.so.0 > /usr/lib/libform.so.5 > /usr/lib/libformw.so.5 > /usr/lib/libgpib.so.3 > /usr/lib/libgssapi_ntlm.so.10 > /usr/lib/libgssapi_spnego.so.10 > /usr/lib/libhistory.so.8 > /usr/lib/liblwres.so.80 > /usr/lib/libmenu.so.5 > /usr/lib/libmenuw.so.5 > /usr/lib/libmilter.so.5 > /usr/lib/libpanelw.so.5 > /usr/lib/librpcsec_gss.so.1 > /usr/lib/libstdbuf.so.1 > /usr/lib/libsupc++.so.1 > /usr/lib/libthread_db.so.3 > > All these are part of base. > > I note that in each case there is a <name>.so symlink pointing to the > relevant library, as is, I believe, accepted best practice. Yes, that's right. > Would I be correct in assuming that the reason libchk is reporting these > as unreferenced is that everything which is actually using them is > referencing the symlink? Actually, it is probably reporting them because nothing is actually using them. libmilter.so.5 for instance won't have any consumers in the base system (not even /usr/libexec/sendmail/sendmail) but it is provided in case you want to install any mail filters from ports or otherwise. > Or is libchk clever enough to resolve symlinks, and there is a different > reason? The shlib sym-link without the ABI version number is generally only used at compile-time. Once the application has been linked, the dynamic loader will require the shared library with appended ABI version. There are instances of things that look at first sight like a shared library, but that don't have an ABI version no. In general, these are not in fact shared libraries, but loadable modules used by various specific programs. Cheers, Matthew -- Dr Matthew J Seaman MA, D.Phil. PGP: http://www.infracaninophile.co.uk/pgpkey JID: matthew@infracaninophile.co.uk
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