The Free Pascal Runtime Library, abbreviated ''RTL'', is

Free Pascal Free Pascal Compiler (FPC) is a compiler for the closely related programming-language dialects Pascal and Object Pascal. It is free software released under the GNU General Public License, witexception clausesthat allow static linking against i ...

runtime library In computer programming, a runtime library is a set of low-level routines used by a compiler to invoke some of the behaviors of a runtime environment, by inserting calls to the runtime library into compiled executable binary. The runtime enviro ...

. The RTL consists of a collection of

units Unit may refer to: Arts and entertainment * UNIT, a fictional military organization in the science fiction television series ''Doctor Who'' * Unit of action, a discrete piece of action (or beat) in a theatrical presentation Music * ''Unit'' (alb ...

that provide

components Circuit Component may refer to: •Are devices that perform functions when they are connected in a circuit. In engineering, science, and technology Generic systems * System components, an entity with discrete structure, such as an assem ...

and classes for general programming tasks. It acts as a basis for

's Free Component Library (FCL) and the

Lazarus Component Library The Lazarus Component Library, abbreviated ''LCL'' is a visual software component library for the Lazarus IDE. Description The LCL consists of a collection of units that provide components and classes especially for visual tasks. It is bas ...

(LCL). The RTL is licensed under the LGPL with a static linking exception.

External links

RTL documentation in the Free Pascal Wiki

Complete online reference
{{Widget toolkits Free Pascal Pascal (programming language) libraries Computer libraries Platform-sensitive development Software using the LGPL license

Further reading

External links