| commit | 6453c5def990b671c4cb3760c7d7d7a55187e168 | [log] [tgz] |
|---|---|---|
| author | Petr Hosek <phosek@google.com> | Sat Jan 12 21:32:25 2019 -0800 |
| committer | Commit Bot <commit-bot@chromium.org> | Wed Oct 14 21:02:04 2020 +0000 |
| tree | 593cf1d9ef169faa0bcb77d31c5fbc0453dc7a8e | |
| parent | 42d6de6e391c2a02ce328691240ec347098d24b4 [diff] |
Support cross-compiling GN for other targets This change extends the recipe used by builders with support for cross-compiling GN to different platforms beyond the host one, and sets up cross compilation for Linux as an example. Change-Id: I0d9aa1a104b14842c875d1a8d9082b6949e47e14 Reviewed-on: https://gn-review.googlesource.com/c/gn/+/3760 Reviewed-by: Scott Graham <scottmg@chromium.org> Reviewed-by: Dirk Pranke <dpranke@google.com> Commit-Queue: Petr Hosek <phosek@google.com>
GN is a meta-build system that generates build files for Ninja.
Related resources:
You can download the latest version of GN binary for Linux, macOS and Windows.
Alternatively, you can build GN from source:
git clone https://gn.googlesource.com/gn cd gn python build/gen.py ninja -C out # To run tests: out/gn_unittests
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.
To build and run the simple example with the default gcc compiler:
cd examples/simple_build ../../out/gn gen -C out ninja -C out ./out/hello
For a maximal configuration see the Chromium setup:
and the Fuchsia setup:
If you find a bug, you can see if it is known or report it in the bug database.
GN uses Gerrit for code review. The short version of how to patch is:
Register at https://gn-review.googlesource.com. ... edit code ... ninja -C out && out/gn_unittests
Then, to upload a change for review:
git commit git push origin HEAD:refs/for/master
The first time you do this you'll get an error from the server about a missing change-ID. Follow the directions in the error message to install the change-ID hook and run git commit --amend to apply the hook to the current commit.
When revising a change, use:
git commit --amend git push origin HEAD:refs/for/master
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.