[Mageia-dev] Utter frustration

[Anne Wilson]

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On 30/11/12 12:26, Frank Griffin wrote:
> On 11/30/2012 07:13 AM, Anne Wilson wrote:
>> 
>> Before doing all that, can you explain the significance of the 
>> suffixes here?
>> 
>> ls /usr/lib/ | grep powerdevil 
>> libpowerdevilconfigcommonprivate.so.4@ 
>> libpowerdevilconfigcommonprivate.so.4.10.0* 
>> libpowerdevilcore.so.0@ libpowerdevilcore.so.0.1.0* 
>> libpowerdevilui.so.4@ libpowerdevilui.so.4.10.0*
>> 
> Library naming conventions use several, actual version, e. g.
> 4.10.0, major version, e. g. 4, and a generic name, e. g.
> libxxx.so.  The last two are usually symlinked to the first.
> 
> The major version usually signals an ABI difference or some other
> major difference, e. g. new function, from the previous version.
> The actual version changes whenever any change is made.  Developers
> use the major version if their code is dependent on that major
> version, but just use the generic name if any version will do.
> 
> In this way, the majority of packages using the library just ask
> for libxxx.so, and don't have to be rebuilt or have their makefiles
> or spec modified when the library changes.  A few packages, which
> are dependent on a specific version, ask for libxxx.so.N (or
> higher), and these have to be changed when the major version they
> require is released.  A very very few packages are dependent on the
> actual version, and these may have to change more often.

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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