@PerlMax said in Custom builder for a library:
How can I start a app from the terminal, so that I can see error messages?
Running clickable logs should let you see the log messages for your app, if there are any. However, given what you've posted already, it seems you are running a bash script, which runs some other process, which has hit a SIGABRT condition.
Perl is not really a supported language for building UT applications, so we'd need to see your code (preferably in a git repository) to be able to help much further. Whatever you are running on the first line of your script is failing. If it is perl, then you might want to also check the system log on your device (/var/log/syslog) for possible apparmor DENIALs.