Install fpc-source by entering the following commands in the terminal:
sudo apt update sudo apt install fpc-source
Description:
Free Pascal - SDK source code dependency package
The Free Pascal Compiler is an Object Pascal compiler supporting both Delphi and Turbo Pascal 7.0 dialects, as well as Mac Pascal dialects. It provides a completely portable RunTime Library (RTL) available on many platforms and compatible with Turbo Pascal, along with a platform-independent class-based Free Component Library (FCL) adding many Delphi extensions and interfacing with many popular open source libraries. . This dependency package always depends on the latest available version of the package containing Free Pascal's own source code. It is meant to be used by the Lazarus IDE.
Homepage: https://www.freepascal.org/
Version: 3.0.4+dfsg-18
Section: universe/devel