Patrick,

I guess this is at least relevant for the ubuntu-full config that uses libspatialite from the distro. This libspatialite must link against proj 6.3.1 from the Ubuntu 20.04 distro, whereas the GDAL we build will link against the PROJ built in the image, so without that trick, crashes would happen.

Even

Le 26/08/2021 à 17:21, Patrick Young a écrit :
Hi,

I was curious how relevant building an internal PROJ library is these days as described in this note

https://trac.osgeo.org/gdal/wiki/BuildingOnUnixGDAL25dev <https://trac.osgeo.org/gdal/wiki/BuildingOnUnixGDAL25dev>

I noticed GDAL's docker builds still do this.  Are there some common dependencies that still use the older PROJ?

Many thanks!
Patrick

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