Free Pascal Runtime Library

Interaction of class libraries and widgetsets in Lazarus and Free Pascal

The Free Pascal Runtime Library, abbreviated RTL, is Free Pascal's runtime library.

The RTL consists of a collection of units that provide components and classes for general programming tasks. It acts as a basis for Free Pascal's Free Component Library (FCL) and the Lazarus Component Library (LCL). The RTL is licensed under the LGPL with a static linking exception.

Further reading

• Michaël van Canneyt; Florian Klämpfl (2012), Free Pascal (Free Pascal 2 ed.), Computer & Literatur Verlag GmbH, ISBN 978-3936546729, OL 25421359M, 393654672X
• Roderick Person (2013), Getting Started with Lazarus IDE, Packt Publishing, ISBN 978-1782163404, OL 25426631M, 1782163409

External links

• RTL documentation in the Free Pascal Wiki
• Complete online reference