[QGIS-Developer] Ubuntu Package Releases and GDAL Dependancies

[Jeremy Palmer]

Hi All,

I've been taking a close look at a way to install QGIS with >= GDAL 2 on
64bit Ubuntu 14.04 and 16.04 for production desktops.

It's not possible to install QGIS using the https://qgis.org/debian package
archive as the ubuntu  14.04 archives only supports GDAL 1.10.1 and 16.04
only supports GDAL 1.11.3.

With https://qgis.org/ubuntugis it is possible to install QGIS with >= GDAL
2.2 as this archive requires ubuntugis-unstable which currently supports
GDAL 2.2.2.

The issue I have is I'm reluctant to use ubuntugis-unstable for production
use. I would rather use ubuntugis-stable. However this archive only
supports GDAL 2.1 and doesn't provide the minimum dependency of GDAL 2.2.2
for https://qgis.org/ubuntugis requires.

I was wondering why ubuntugis stable isn't used as the debian archive for
https://qgis.org/ubuntugis and ubuntugis-unstable is only used for the
development (e.g 2.99) nightly builds? This makes more sense to me.

I've also noted that the 2.18 binaries produced for the 14.04 and 16.04
packaging has inconsistent dependency requirements. e.g 2.18.15 14.04
64bit :

qgis - gdal-abi-2-2-2, libgdal20 (>= 1.8.0)
qgis-providers = libgdal20 (>= 2.2.0)
qgis-server - libgdal20 (>= 1.8.0)
libqgis-dev - libgdal-dev (>= 1.10.1-0~)
libqgis-core - libgdal20 (>= 2.2.0)
libqgis-app2 libgdal20 (>= 2.0.1)

Thanks,
Jeremy
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