[gdal-dev] compiling GDAL with GEOS support.

[Jerl Simpson]

That was the problem.  I thought specifying the GEOS install directly would
overcome that.

Thanks for the help.

Jerl

On Wed, Aug 17, 2011 at 1:00 PM, Even Rouault
<even.rouault at mines-paris.org>wrote:

> Le mercredi 17 août 2011 18:19:20, Jerl Simpson a écrit :
> > Hi:
> >
> > I'm having a strange issue when compiling GDAL with GEOS support.
> >
> > I wonder if someone can help.
> >
> > When I enable GEOS support using "--with-geos=/usr/local/bin/geos-config"
> I
> > get the following errors:
> >
> > gdal/.libs/libgdal.so: undefined reference to `GEOSWKBWriter_create'
> > gdal/.libs/libgdal.so: undefined reference to `GEOSSimplify'
> > gdal/.libs/libgdal.so: undefined reference to `GEOSWKBWriter_write'
> > gdal/.libs/libgdal.so: undefined reference to
> > `GEOSWKBWriter_setOutputDimension'
> > gdal/.libs/libgdal.so: undefined reference to `GEOSUnionCascaded'
> > gdal/.libs/libgdal.so: undefined reference to `GEOSFree'
> > gdal/.libs/libgdal.so: undefined reference to `GEOSWKBWriter_destroy'
> > gdal/.libs/libgdal.so: undefined reference to
> > `GEOSGeom_getCoordinateDimension'
>
> Hum, what is interesting here is that all those symbols are conditionnaly
> used
> when GEOS >= 3.1 is detected. So my guess is that GDAL builds against the
> include files of the newer GEOS version you specify, but at the linking
> stage,
> there's an older libgeos that must be somewhere in the linking path,
> probably
> in /usr/lib that gets linked before the one you would liked too. So you
> might
> want to uninstall your older geos version, or to alter the linking order of
> the LIBS variable in GDALmake.opt and/or remove the mentions to -L/usr/lib
> that might be found in it
>



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