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.

Extensions have been added to the language, such as function overloading, creation and linking of shared libraries, and Delphi language extensions including classes, exceptions, ANSI strings, and open arrays.

This dependency package always depends on the latest available version of the package containing the Integrated Development Environment (IDE). The IDE has an internal compiler.