[2021.07] libxerces dependency missing on Debian 11

[wsdookadr]

Problem description

I'm using Debian 11 bullseye and I tried using the latest appimage release 2021.07. At startup, it shows an error with the following message:

	libio_e57.so: libio_e57.so does not seem to be a Qt Plugin.

Cannot load library /tmp/.mount_MeshLardC8HA/usr/lib/meshlab/plugins/libio_e57.so: 
(libxerces-c-3.2.so: cannot open shared object file: No such file or directory)

Workaround

I worked around this by installing libxerces:

sudo apt-get install libxerces-c-dev libxerces-c3.2

Proposed solution

To fix this, I propose libxerces be added to the list of installed packages in the build environment, so in the file 0_setup_env_ubuntu.sh and maybe also to the script that bundles together everything in the AppImage, in 2_deploy.sh . In the latter, I agree that -bundle-non-qt-libs should be enough, but it seems like libs need to be explicitly added there.

[alemuntoni]

This issue should be already solved here: 3327ceb
You can downloading the last nightly build to check if everything works as expected.