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Re: Interpreting package version number




On Wed, Jan 16, 2019 at 08:51:27AM -0600, Richard Owlett wrote:
> On 01/16/2019 07:58 AM, songbird wrote:
> > Richard Owlett wrote:
> > 
> > > I'm running Stretch and have just installed Tcl from repository.
> > > Synaptic reports the installed version is 8.6.6+dfsg-1+b1 .
> > > The current upstream version is 8.6.9 .
> > > 
> > > I don't understand what "+dfsg-1+b1" is telling me.
> > > Where is that numbering scheme described?
> > > 
> > > My goal is to understand (from upstream docs) how what I have installed
> > > differs from the current upstream version.
> > 
> >    if you want to know what is different in any
> > debian package you can download the source code
> > package and look at the patches it applies.
> > 
> 
> IIUC "dfsg" tells me that Debian chose a different means to the same
> functional end (User's POV) than how upstream accomplished it.
> 
Sort of.  The reason for a "dfsg" repack of the upstream source is
usually to remove some components that may not be permitted to
distribute.  These might include binary blobs which cannot be generated
from source, non-free documentation (some protocol libraries include
copies of the RFCs they implement and those RFCs are sometimes not
freely redistributable).

I have yet to encounter a "dfsg" repack that changes the functionality
of the package, though.  So, in that regard your statement is correct.

Regards,

-Roberto

-- 
Roberto C. Sánchez