On 2/17/23 23:08, Yuri Astrakhan wrote:
As reported at OSGeo/PROJ-data [1] and also found on stackexchange 5 years
ago [2], it seems it is not possible to install libproj9 in a
cross-compilation scenario:
[1] https://github.com/OSGeo/PROJ-data/issues/94
[2]
https://askubuntu.com/questions/997277/multiarch-issue-with-packages-marked-as-supporting-all-architectures
The upstream PROJ-data project is for the grid shift files, it is not
related to the proj-data package which provides the resource files [0]
for libproj.
[0] https://proj.org/resource_files.html
When using proj in a multi-architecture environment (compiling
cross-platform), the `proj-data` debian package does not exist. The
stackexchange post [2] has some hacky solutions on how to get around this
issue. I was trying to use https://github.com/cross-rs/cross 's docker
image, and inside install proj with:
`docker run --rm -it ghcr.io/cross-rs/aarch64-unknown-linux-gnu:latest`
```bash
dpkg --add-architecture arm64
apt-get update
apt show libproj9:arm64
# shows Depends: proj-data, libc6 (>= 2.17)
apt-get install -y libproj9:arm64
# The following packages have unmet dependencies:
# libproj9:arm64 : Depends: proj-data:arm64 but it is not installable
apt-get install -y proj-data:arm64
# E: Package 'proj-data:arm64' has no installation candidate
```
The cross-build issue was fixed six years ago in proj (4.9.3-2~exp1):
https://bugs.debian.org/857538
You seem to be using Ubuntu xenial with proj (4.9.2-2), you'll need
bionic or later for the Multi-Arch changes:
https://launchpad.net/ubuntu/+source/proj
While Launchpad marks xenial as supported, standard supported ended in
April 2021, standard support for bionic ends in April 2023. You should
use the latest LTS (focal) if you cannot use Debian stable (bullseye).
The geospatial packages are not maintained in Ubuntu, so bugs don't get
fixed there via stable updates, only the packages in Debian are actively
maintained.
Kind Regards,
Bas
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