[Bug 507915] Review Request: ldd-pdf - Linux Device Drivers, Third Edition Book in PDF format

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https://bugzilla.redhat.com/show_bug.cgi?id=507915


Dennis Gregorovic <dgregor at redhat.com> changed:

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                 CC|                            |dgregor at redhat.com




--- Comment #17 from Dennis Gregorovic <dgregor at redhat.com>  2009-07-01 11:37:51 EDT ---
(In reply to comment #10)
> (In reply to comment #9)
> > I disaggree with you in this point. Even if alle the releases contains the same
> > content, it may be helpful to use the %{dist} tag. For example for F-12 the
> > usage of LZMA to compress the rpm data is planed. So on the dist tag, you can
> > see, if you can use a package for F-12 or not without a try to install it.  
> 
> Not using the %dist tag doesn't mean the F12 package won't be LZMA compressed.
> What matters is when one updates, say from F11 to F12 the packages that don't
> have the %dist tag won't be updated (until a new version is available in the
> updates repo) if the version and release in both distros is the same: say,
> foo-1-1 in F11 and foo-1-1 in F12.

I'm not following the logic here.  

With the dist tag: If you have foo-1-1.fc11 in F11 and don't rebuild it, then
you will have foo-1-1.f11 in F12.  If you rebuild it, then you'll have
foo-1-1.f12 in F12.

Without the dist tag: If you have foo-1-1 in F11 and don't rebuild it, then you
will have foo-1-1 in F12.  If you rebuild it, then you'll have foo-1-2 or
foo-1-1.1 in F12, depending on your numbering preference.

The dist tag doesn't cause any additional builds and only helps when you need
to rebuild.

> When the dist tag is used the F12 package foo-1-1.fc12 will be "newer" than
> foo-1-1.fc11 and thus will replace the old one.
> 
> In case the package is (close to) identical in both distros [no binaries
> compiled], not using the dist tag saves some download and update time.

It sounds like there is some assumption that the dist tag ties a particular
build to a release.  That's not the case.  There are plenty of .fc9 package in
F10, for example.  
> 
> Of course, generally speaking something is compiled in every package and the
> %dist tag should be used, so from a stylistic point of view using it could be
> advised in these cases too. However, if the package is as big as the SRPM (11
> MB) I wouldn't put in a %dist tag since nothing is gained from it.

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