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LDC – the LLVM-based D Compiler
===============================

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The LDC project provides a portable D programming language compiler
with modern optimization and code generation capabilities.

The compiler uses the official DMD frontend to support the latest
version of D2, and relies on the LLVM Core libraries for code
generation.

LDC is fully Open Source; the parts of the source code not taken/adapted from
other projects are BSD-licensed (see the LICENSE file for details).

Please consult the D wiki for further information:
https://wiki.dlang.org/LDC

D1 is no longer available; see the `d1` Git branch for the last
version supporting it.


Installation
------------

### From a pre-built package

Portable stand-alone binary builds (and a Windows installer) for common
platforms (incl. Linux, macOS, Windows, FreeBSD and Android) are available
at the [GitHub release page](https://github.com/ldc-developers/ldc/releases).
For Windows, the [Visual D installer](https://rainers.github.io/visuald/visuald/StartPage.html)
also comes with a bundled LDC.

For bleeding-edge users, we also provide the [latest successful Continuous
Integration builds](https://github.com/ldc-developers/ldc/releases/tag/CI)
with enabled LLVM & LDC assertions (increasing compile times by roughly 50%).

The [dlang.org install script](https://dlang.org/install.html) can also be
used to install these official packages from GitHub:

    curl -fsS https://dlang.org/install.sh | bash -s ldc

In addition, LDC is available from various package managers (but note that
these packages are **community-maintained, might be outdated and not offer
the full feature set of official packages from GitHub**):

|              | Command                                      |
| ------------ | -------------------------------------------- |
| Alpine Linux | `apk add ldc`                              |
| Android      | in [Termux app](https://play.google.com/store/apps/details?id=com.termux&hl=en): `pkg install ldc` |
| Arch Linux   | `pacman -S ldc`                              |
| Chocolatey   | `choco install ldc`                          |
| Debian       | `apt install ldc`                            |
| Docker       | `docker pull dlang2/ldc-ubuntu`              |
| Fedora       | `dnf install ldc`                            |
| FreeBSD      | `pkg install ldc`                            |
| Gentoo       | `layman -a ldc`                              |
| Homebrew     | `brew install ldc`                           |
| Nix/NixOS    | `nix-env -i ldc`                             |
| OpenBSD      | `pkg_add ldc`                                |
| Snap         | `snap install --classic --channel=edge ldc2` |
| Ubuntu       | `apt install ldc`                            |
| Void         | `xbps-install -S ldc`                        |

### Building from source

In-depth material on building and installing LDC and the standard
libraries is available on the project wiki for
[Linux, macOS, BSD, and Android](http://wiki.dlang.org/Building_LDC_from_source) and
[Windows](http://wiki.dlang.org/Building_and_hacking_LDC_on_Windows_using_MSVC).

If you have a working C++/D build environment, CMake, and a recent LLVM
version (≥ 6.0) available, there should be no big surprises. Do not
forget to make sure all the submodules (druntime, phobos, dmd-testsuite)
are up to date:

    $ cd ldc
    $ git submodule update --init

(DMD, GDC and LDC are supported as host compilers. For bootstrapping
purposes, we recommend GDC via its `gdmd` wrapper.)

Cross-compilation
-----------------

Similar to other LLVM-based compilers, cross-compiling with LDC is simple.
Full instructions and example invocations are provided on the dedicated
[Wiki page](https://wiki.dlang.org/Cross-compiling_with_LDC).

#### Targeting Android

You can find full instructions on cross-compiling or natively compiling
for Android [on the wiki](https://wiki.dlang.org/Build_D_for_Android).

Contact
-------

The best way to get in touch with the developers is either via the
[digitalmars.D.ldc forum/newsgroup/mailing list](https://forum.dlang.org)
or our [Gitter chat](http://gitter.im/ldc-developers/main).
There is also the #ldc IRC channel on FreeNode.

For further documentation, contributor information, etc. please see
[the D wiki](https://wiki.dlang.org/LDC).

Feedback of any kind is very much appreciated!


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