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Licensing

This repository brings together several components under different compatible licenses. Source files and notices must not be removed when redistributing them.

Compiler

The Free Pascal / Unleashed compiler sources are distributed under GNU GPL v2 or later. MoonCompiler compiler changes are published under the same terms. The license text is in compiler/COPYING.txt.

The compiler's GPL does not automatically extend to a program it compiles: the license applies to the compiler itself and its derivatives.

RTL and Packages

The Runtime Library and FPC packages carrying the FPC linking notice retain LGPL v2.1 or later with that static-linking exception. Other bundled components retain their individual licenses, listed below; the exception does not apply automatically to every package. The RTL license text is in rtl/COPYING.txt, and the exception is in rtl/COPYING.FPC. The exception permits linking the RTL into an application without making that application an LGPL derivative solely because of that link; changes to the RTL units themselves remain under their original license.

Bundled Memory Manager

runtime/mm/mormot.core.fpcx64mm.pas retains the original mORMot license header: a choice of MPL 1.1 / GPL 2+ / LGPL 2.1+ with the FPC linking exception. A copy of the notices is in runtime/mm/LICENSE.md.

Bundled zlib Engine

The RTL's compressed DWARF reader and System.ZLib share zlib 1.3.1 native objects under the zlib license. The source archive, build script and notice are retained in rtl/inc/zlib. Binary distributions include share/doc/mooncompiler/ZLIB-LICENSE.txt.

Bundled Brotli Decoder

The optional Moon.HttpClient.Brotli unit links Google's Brotli 1.2.0 decoder under the MIT license. Using System.Net.HttpClient alone does not link it. Its unmodified source archive, build script and license are retained in packages/vcl-compat/native/brotli. Binary distributions include share/doc/mooncompiler/BROTLI-MIT.txt.

Static Regular Expression Engine

The Delphi compatibility regex units link PCRE2 10.49 under its BSD license and exception. The source archive includes the separate BSD notice for its SLJIT backend. Windows also links the GCC stack-probe runtime fragment under GPLv3 with the GCC Runtime Library Exception. Its original source, license and exception are retained with the native build recipe. The binary toolchain includes the applicable notices in share/doc/mooncompiler.

Windows SDK Declarations

The direct SDK units derived from the existing open FPC/JEDI headers retain their individual MPL 1.1 / LGPL notices and attribution. We distribute these under the MPL 1.1 option. Removing Jwa unit dependencies does not remove those licenses. The source map and dated modifications and full MPL text accompany the Win64 toolchain. The declarations and small SDK macro translations are not copied from Embarcadero's proprietary RTL.

Optional Diagnostic Reports

runtime/reporting uses the RTL license and linking exception; see its notice. Linux uses a dynamically loaded system libunwind, which is not bundled in this source directory.

External mORMot Qualification Inputs

Qualification fetches Moonbot-Tech/MoonORMot and a separate public upstream mORMot compiler corpus at exact commits. Neither full source tree is included in MoonCompiler Git history; each retains its own license and third-party notices.

Practical Rule

You may modify, build, and redistribute MoonCompiler, the RTL, MM, and tests, including through a public GitHub fork, provided that license headers and notices are retained and the source is available for MoonCompiler and every distributed GPL/LGPL/MPL component. Your own applications may remain under their own license within the applicable linking exceptions.