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<H1>[Mageia-dev] Utter frustration</H1>
<B>Anne Wilson</B>
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TITLE="[Mageia-dev] Utter frustration">annew at kde.org
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<I>Fri Nov 30 13:59:25 CET 2012</I>
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<PRE>-----BEGIN PGP SIGNED MESSAGE-----
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On 30/11/12 12:26, Frank Griffin wrote:
><i> On 11/30/2012 07:13 AM, Anne Wilson wrote:
</I>>><i>
</I>>><i> Before doing all that, can you explain the significance of the
</I>>><i> suffixes here?
</I>>><i>
</I>>><i> ls /usr/lib/ | grep powerdevil
</I>>><i> libpowerdevilconfigcommonprivate.so.4@
</I>>><i> libpowerdevilconfigcommonprivate.so.4.10.0*
</I>>><i> libpowerdevilcore.so.0@ libpowerdevilcore.so.0.1.0*
</I>>><i> libpowerdevilui.so.4@ libpowerdevilui.so.4.10.0*
</I>>><i>
</I>><i> Library naming conventions use several, actual version, e. g.
</I>><i> 4.10.0, major version, e. g. 4, and a generic name, e. g.
</I>><i> libxxx.so. The last two are usually symlinked to the first.
</I>><i>
</I>><i> The major version usually signals an ABI difference or some other
</I>><i> major difference, e. g. new function, from the previous version.
</I>><i> The actual version changes whenever any change is made. Developers
</I>><i> use the major version if their code is dependent on that major
</I>><i> version, but just use the generic name if any version will do.
</I>><i>
</I>><i> In this way, the majority of packages using the library just ask
</I>><i> for libxxx.so, and don't have to be rebuilt or have their makefiles
</I>><i> or spec modified when the library changes. A few packages, which
</I>><i> are dependent on a specific version, ask for libxxx.so.N (or
</I>><i> higher), and these have to be changed when the major version they
</I>><i> require is released. A very very few packages are dependent on the
</I>><i> actual version, and these may have to change more often.
</I>
I assume the starred ones are actually in use - what's the
significance of '@'? I'm not sure I've really understood this.
Anne
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