The LLVM-based D compiler.
D C++ C CMake Makefile DTrace
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appveyor.yml AppVeyor: Update LLVM to 4.0 r276453 Jul 22, 2016
circle.yml [CircleCI] Fix Circle CI build. Jul 21, 2016 Simplify and fix install target Sep 26, 2015 Dynamically load libcurl when needed (backport from post-2.068 upstream) Aug 29, 2015 [PGO] Add PGO to LDC. Supported for LLVM >= 3.7 Jun 20, 2016

LDC – the LLVM-based D Compiler

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

The compiler uses the official DMD frontends 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 code not taken/adapted from other projects are BSD-licensed (see the LICENSE file for details).

Please consult the D wiki for further information:

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


From a pre-built package

Linux and OS X

Some package managers include recent versions of LDC, so manually installing it might not be necessary. For several platforms, there are also stand-alone binary builds available at the GitHub release page.

Distribution Command
Arch Linux pacman -S ldc
Debian apt-get install ldc
Fedora yum install ldc
Gentoo layman -a ldc
HomeBrew brew install ldc
Ubuntu apt-get install ldc

The latest official releases can be downloaded from the GitHub release page.

For bleeding-edge users, we also provide the latest successful continuous integration builds.

LDC for Windows relies on the Microsoft linker. So you'll either need Visual Studio (2015 is greatly encouraged; 2013 works too if you build LDC yourself) with Visual C++, or the stand-alone Visual C++ Build Tools. For the latter to work, you'll need to create the environment variable LDC_VSDIR and set it to something like C:\Program Files (x86)\Microsoft Visual Studio 14.0\.

Building from source

In-depth material on building and installing LDC and the standard libraries is available on the project wiki for Linux and OS X and Windows.

If you have a working C++ build environment, CMake, a current LLVM (>= 3.5), and libconfig available there should be no big surprises. Building LDC also requires a working D compiler, DMD and LDC are supported. (LDC 0.17 is the last version that does not need a D compiler, and for that reason we try to maintain it in the 'ltsmaster' branch).

Do not forget to make sure all the submodules (druntime, phobos, dmd-testsuite) are up to date:

$ cd ldc
$ git submodule update --recursive --init


The best way to get in touch with the developers is either via the digitalmars.D.ldc forum/newsgroup/mailing list ( or our Gitter chat. There is also the #ldc IRC channel on FreeNode.

For further documentation, contributor information, etc. please see the D wiki:

Feedback of any kind is very much appreciated!