Install libpt-dbg by entering the following commands in the terminal:
sudo apt update sudo apt install libpt-dbg
Portable Tools Library development debug files
This package contains the shared and static debug symbols of the library PTLib, which is a moderately large class library that has its genesis many years ago as a method to produce applications to run on both Microsoft Windows and Unix X-Window systems. This is not the debug compiled version of PTLib which would yield much more detailled information as a compromise of benefit and compile power consumption.