I am having the same problems as in those previous posts
- QGIS 2.14 fails to install on Ubuntu 14.04
- Installing the latest QGIS version on Ubuntu 14.04
- QGIS update from 2.14 to 2.16 failed on Ubuntu 14.04 [closed]
Though here the compilation failed with qgis 2.18.
I tried in my sources.list
deb http://qgis.org/debian trusty main
deb-src http://qgis.org/debian trusty main
as in post 2 above but I have dependencies issues. I then tried with
deb http://qgis.org/ubuntugis trusty main
deb-src http://qgis.org/ubuntugis trusty main
The installation failed at the configuration of qgis-providers with
/usr/lib/qgis/crssync: symbol lookup error: /usr/lib/libgdal.so.20: undefined symbol: GEOSDelaunayTriangulation_r
To solve this issue, I installed the latest gdal librairy, gdal-2.1.2.
The gdal lib comming with qgis was libgdal.so.20.1.0
This solved the above error, however the installation failed again when setting upqgis-providers, now with this error
/usr/lib/qgis/crssync: symbol lookup error: /usr/lib/libqgis_core.so.2.18.1: undefined symbol: GEOSNearestPoints_r
I also tried the installation with the unstable ubuntugis repository (ie qgis version 2.14) and got exact same problems. but apparently qgis 2.14 is not more supported according to the comments in post 1 above.
EDIT 1:
that's what I have been running
clean existing repositories
sudo add-apt-repository --remove ppa:ubuntugis/ubuntugis-unstable
sudo add-apt-repository --remove ppa:ubuntugis
clean existing package
sudo apt-get remove gdal*
sudo apt-get remove libgdal*
sudo apt-get remove qgis*
sudo apt-get remove libgqgis*
sudo apt-get autoremove
in sources.list
deb http://qgis.org/debian/ trusty main
deb-src http://qgis.org/debian trusty main
then update and install
sudo apt-get update
sudo apt-get install qgis python-qgis
which gives
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
gdal-bin grass-core libfreexl1 libgdal1h liblwgeom-2.1.2 liblwgeom-dev
libqgis-analysis2.18.1 libqgis-app2.18.1 libqgis-core2.18.1
libqgis-customwidgets libqgis-gui2.18.1 libqgis-networkanalysis2.18.1
libqgis-server2.18.1 libqgisgrass6-2.18.1 libqgispython2.18.1 libspatialite5
python-gdal python-pyspatialite python-qgis-common python-shapely
qgis-common qgis-plugin-grass qgis-plugin-grass-common qgis-provider-grass
qgis-providers qgis-providers-common
Suggested packages:
grass-doc grass-gui grass-dev e00compr avce00 gpsbabel gpstrans python-rpy2
xml2
The following NEW packages will be installed
gdal-bin grass-core libfreexl1 libgdal1h liblwgeom-2.1.2 liblwgeom-dev
libqgis-analysis2.18.1 libqgis-app2.18.1 libqgis-core2.18.1
libqgis-customwidgets libqgis-gui2.18.1 libqgis-networkanalysis2.18.1
libqgis-server2.18.1 libqgisgrass6-2.18.1 libqgispython2.18.1 libspatialite5
python-gdal python-pyspatialite python-qgis python-qgis-common
python-shapely qgis qgis-common qgis-plugin-grass qgis-plugin-grass-common
qgis-provider-grass qgis-providers qgis-providers-common
0 to upgrade, 28 to newly install, 0 to remove and 0 not to upgrade.
Need to get 0 B/71.8 MB of archives.
After this operation, 265 MB of additional disk space will be used.
Do you want to continue? [Y/n]
Selecting previously unselected package libfreexl1:amd64.
(Reading database ... 1316497 files and directories currently installed.)
Preparing to unpack .../libfreexl1_1.0.0g-1ubuntu0.14.04.2_amd64.deb ...
Unpacking libfreexl1:amd64 (1.0.0g-1ubuntu0.14.04.2) ...
… lots of Unpacking …
Processing triggers for man-db (2.6.7.1-1ubuntu1) ...
Processing triggers for mime-support (3.54ubuntu1.1) ...
Processing triggers for gnome-menus (3.10.1-0ubuntu2) ...
Processing triggers for desktop-file-utils (0.22-1ubuntu1) ...
Processing triggers for hicolor-icon-theme (0.13-1) ...
Processing triggers for shared-mime-info (1.2-0ubuntu3) ...
Unknown media type in type 'all/all'
Unknown media type in type 'all/allfiles'
Unknown media type in type 'uri/mms'
Unknown media type in type 'uri/mmst'
Unknown media type in type 'uri/mmsu'
Unknown media type in type 'uri/pnm'
Unknown media type in type 'uri/rtspt'
Unknown media type in type 'uri/rtspu'
Setting up libfreexl1:amd64 (1.0.0g-1ubuntu0.14.04.2) ...
Setting up libspatialite5:amd64 (4.1.1-5ubuntu1) ...
Setting up qgis-providers-common (1:2.18.1+20trusty) ...
Setting up libgdal1h (1.10.1+dfsg-5ubuntu1) ...
Setting up libqgis-core2.18.1 (1:2.18.1+20trusty) ...
Setting up libqgis-gui2.18.1 (1:2.18.1+20trusty) ...
Setting up qgis-providers (1:2.18.1+20trusty) ...
/usr/lib/qgis/crssync: symbol lookup error: /usr/lib/libqgis_core.so.2.18.1: undefined symbol: GEOSNearestPoints_r
dpkg: error processing package qgis-providers (--configure):
subprocess installed post-installation script returned error exit status 127
Setting up gdal-bin (1.10.1+dfsg-5ubuntu1) ...
Setting up grass-core (6.4.3-3) ...
Setting up liblwgeom-2.1.2 (2.1.2+dfsg-2ubuntu0.1) ...
Setting up liblwgeom-dev (2.1.2+dfsg-2ubuntu0.1) ...
Setting up libqgis-analysis2.18.1 (1:2.18.1+20trusty) ...
Setting up libqgis-app2.18.1 (1:2.18.1+20trusty) ...
Setting up libqgis-customwidgets (1:2.18.1+20trusty) ...
Setting up libqgis-networkanalysis2.18.1 (1:2.18.1+20trusty) ...
Setting up libqgis-server2.18.1 (1:2.18.1+20trusty) ...
Setting up libqgisgrass6-2.18.1 (1:2.18.1+20trusty) ...
Setting up libqgispython2.18.1 (1:2.18.1+20trusty) ...
Setting up python-gdal (1.10.1+dfsg-5ubuntu1) ...
Setting up python-shapely (1.3.0-1) ...
Setting up python-qgis-common (1:2.18.1+20trusty) ...
Setting up python-pyspatialite (3.0.1-4) ...
Setting up python-qgis (1:2.18.1+20trusty) ...
Setting up qgis-common (1:2.18.1+20trusty) ...
No apport report written because the error message indicates it's a follow-up error from a previous failure.
dpkg: dependency problems prevent configuration of qgis:
qgis depends on qgis-providers (= 1:2.18.1+20trusty); however:
Package qgis-providers is not configured yet.
dpkg: error processing package qgis (--configure):
dependency problems - leaving unconfigured
Setting up qgis-plugin-grass-common (1:2.18.1+20trusty) ...
Setting up qgis-provider-grass (1:2.18.1+20trusty) ...
dpkg: dependency problems prevent configuration of qgis-plugin-grass:
qgis-plugin-grass depends on qgis (= 1:2.18.1+20trusty); however:
Package qgis is not configured yet.
dpkg: error processing package qgis-plugin-grass (--configure):
dependency problems - leaving unconfigured
No apport report written because the error message indicates it's a follow-up error from a previous failure.
Processing triggers for libc-bin (2.19-0ubuntu6.9) ...
E: Sub-process /usr/bin/dpkg returned an error code (1)
EDIT 2:
when following the same commands than in EDIT 1
but using in the sources.list
deb http://qgis.org/ubuntugis trusty main
deb-src http://qgis.org/ubuntugis trusty main
deb http://ppa.launchpad.net/ubuntugis/ubuntugis-unstable/ubuntu trusty main
the installation still crashes with qgis-providers but complains about gdal
/usr/lib/qgis/crssync: symbol lookup error: /usr/lib/libgdal.so.20: undefined symbol: GEOSDelaunayTriangulation_r
Best Answer
The installation error seems to come from
libspatialite5. There are two versions available for trusty:4.1.1-5ubuntu1 from the main ubuntu repo. It depends on
libgeos-c1andlibgdal1h, and is used byqgis.org/debian4.1.1-5ubuntu2 from ubuntugis ppa. It is compiled against
libgeos-c1v5andlibgdal20, and is used byqgis.org/ubuntugis.Unfortunately, the libspatialite dependencies are not detected by the
qgispackages.You have to decide which path to install, and avoid mixing packages from both.
A clean install on a fresh Ubuntu inside a Virtual Box seems to solve the problem. On the host system, cleaning the system according to https://askubuntu.com/questions/231562/what-is-the-difference-between-apt-get-purge-and-apt-get-remove might solve the issue.