On 22/04/2015 05:43, Rob Skelly wrote:
Hello,
I am using GDAL 2.0 for most of my work, but rgdal depends on GDAL < 2. I
have built and installed GDAL 1.11.2 in /opt/gdal-1.11.2, and rgdal
compiles and installs into R, using the following command:
sudo R CMD INSTALL
--configure-args="--with-gdal-config=/opt/gdal.1.11.2/bin/gdal-config"
rgdal-0.9-2.tar.gz
However when R attempts to load rgdal at the end of the installation, it
fails with the error,
Error in dyn.load(file, DLLpath = DLLpath, ...) :
unable to load shared object
'/usr/local/lib/R/site-library/rgdal/libs/rgdal.so':
/usr/local/lib/R/site-library/rgdal/libs/rgdal.so: undefined symbol:
_ZN10OGRPolygon7addRingEP13OGRLinearRing
The addRing method on OGRPolygon seems to be a relic of GDAL 1.11.2 and no
longer exists in 2.0, so R is loading libgdal from /usr/local/lib, not
/opt/gdal-1.11.2/lib. I have confirmed this by temporarily moving the
1.11.2 libs into /usr/local, where it works fine.
You can *really* confirm where things are found via R CMD ldd ... see
the manual.
So, the question is, how to I convince R to use the new library search
path? I'm on xubuntu, and R is installed using apt.
You either use the ld options when building rgdal.so (e.g. for your OS
-Wl,-rpath=/opt/gdal-1.11.2/lib) or you link statically. The latter is
easier and safer ... just build a static GDAL.
Many projects set -R/-rpath flags in their config scripts: it is
something you could suggest to the GDAL maintainers (and finding them is
part of libtool which GDAL uses).
But (see the posting guide) the generic question belonged on R-devel and
questions about rgdal on R-sig-geo.
Thanks,
Rob
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
--
Brian D. Ripley, rip...@stats.ox.ac.uk
Emeritus Professor of Applied Statistics, University of Oxford
1 South Parks Road, Oxford OX1 3TG, UK
______________________________________________
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
