Free Pascal
Free Pascal Compiler (FPC for short, and formerly known as FPK Pascal) is a free Pascal and Object Pascal compiler.
In addition to its own Object Pascal dialect, Free Pascal supports, to varying degrees, the dialects of several other compilers, including those of Turbo Pascal, Delphi, and some historical Macintosh compilers. The dialect is selected on a per-unit (module) basis, and more than one dialect can be used to produce a single program.
A member of the write once, compile anywhere philosophy, Free Pascal is available for many architectures and operating systems (see Targets). It has support for integration of assembly language and supports internal assembler in a number of dialects.
Separate projects exist to facilitate the development of cross-platform graphical applications, the most prominent one being the Lazarus IDE.
Supported dialects
Free Pascal adopted the de facto standard dialect of Pascal programmers, Borland Pascal and, later, Delphi. From version 2.0 on, the Delphi 7 compatibility has been continuously implemented or improved.
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