Provide separate Rust tools for different output types

This introduces a set of new tools corresponding to different Rust
output types/crate types: cdylib, dylib, proc_macro, rlib and staticlib.

This enables using different setting for different output types, e.g.
Rust and static libraris should typically go into different output dirs
akin to their C counterparts. On the other hand, executables and dynamic
libraries might need additional post-processing such as stripping. This
wasn't possible with a single tool because there's no way conditionalize
the logic used by the tool.

Change-Id: I2dc2ad927a2a0f55b995abbf269bb7fcd0037c49
Commit-Queue: Petr Hosek <>
Reviewed-by: Brett Wilson <>
20 files changed
tree: a731d57e431c4affc29819c0e5f14a2be0d661b6
  1. base/
  2. build/
  3. docs/
  4. examples/
  5. infra/
  6. tools/
  7. util/
  8. .clang-format
  9. .editorconfig
  10. .gitignore
  11. .style.yapf
  14. OWNERS


GN is a meta-build system that generates build files for Ninja.

Related resources:

Getting a binary

You can download the latest version of GN binary for Linux, macOS and Windows.

Alternatively, you can build GN from source:

git clone
cd gn
python build/
ninja -C out
# To run tests:

On Windows, it is expected that cl.exe, link.exe, and lib.exe can be found in PATH, so you'll want to run from a Visual Studio command prompt, or similar.

On Linux and Mac, the default compiler is clang++, a recent version is expected to be found in PATH. This can be overridden by setting CC, CXX, and AR.


There is a simple example in examples/simple_build directory that is a good place to get started with the minimal configuration.

For a maximal configuration see the Chromium setup:

and the Fuchsia setup:

Reporting bugs

If you find a bug, you can see if it is known or report it in the bug database.

Sending patches

GN uses Gerrit for code review. The short version of how to patch is:

Register at

... edit code ...
ninja -C out && out/gn_unittests

Then, to upload a change for review:

git commit
git cl upload --gerrit

When revising a change, use:

git commit --amend
git cl upload --gerrit

which will add the new changes to the existing code review, rather than creating a new one.

We ask that all contributors sign Google's Contributor License Agreement (either individual or corporate as appropriate, select ‘any other Google project’).


You may ask questions and follow along with GN‘s development on Chromium’s gn-dev@ Google Group.