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Re: RFC: Soname in rpm name



On Mon, 2005-01-24 at 16:01 +0100, Michael Schwendt wrote:
> On Mon, 24 Jan 2005 09:47:39 -0500, Charles R. Anderson wrote:
> 
> > On Mon, Jan 24, 2005 at 12:59:57PM +0100, Aurelien Bompard wrote:
> > > Jeff Johnson wrote:
> > > > Try with rpm -i.
> > > 
> > > Yeah OK. How about something that would be understood by depsolvers then ?
> > 
> > installonly packages are already well understood by depsolvers.  Look 
> > at the kernel packages.
> > 
> > yum.conf:
> > 
> > installonlypkgs=
> > 
> 
> Nah, that's only a work-around. There's no way for a repository to flag
> packages as install-only.

Using the rpm install method also breaks upgrades.  Say you have
libfoo-1.0 and libfoo-2.0.  Many apps use libfoo-1.0 and will continue
to do so because it's a massive API upgrade to libfoo-2.0.  think gtk1
vs gtk2.  Now a security bug is found in the 1.0 branch, and the
developers realize that a lot of users are stuck with apps using that
branch, so they release 1.1 with the security update (as the version
indicates, it's backwards compatible with 1.0), so libfoo-1.1 is
released.  With rpm install-only packages libfoo-1.1 would not be
installed unless the user manually told the system to do it, since
libfoo-2.0 is installed and is newer.

The only way for this to work is make RPM recognize that libfoo-1.0 and
libfoo-2.0 are completely different packages.  Just because they're both
libfoo is irrelevant, they are different APIs and different ABIs.

In GTK's case the second version just got a two appended.  Packages are
gtk and gtk2.

While that works, in the general case, using the soversion probably just
makes more sense.  The packages could be, for example, libfoo1.0 and
libfoo2.0.  The specifics aren't that important, just so long as it
works.


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