|author||Robert Sesek <firstname.lastname@example.org>||Thu Oct 10 18:08:36 2019 -0400|
|committer||Commit Bot <email@example.com>||Thu Oct 10 22:31:40 2019 +0000|
Switch Semaphore to use dispatch_semaphore_t on Mac. The dispatch_semaphore_t is a higher-level, more-efficient semaphore primitive if the cross-process capabilities of semaphore_t are not needed. Bug: chromium:1012386 Change-Id: I9c1b50805ce7ec54f4848a2633b4a7b260e00578 Reviewed-on: https://gn-review.googlesource.com/c/gn/+/6240 Reviewed-by: Scott Graham <firstname.lastname@example.org> Commit-Queue: Scott Graham <email@example.com>
GN is a meta-build system that generates build files for Ninja.
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
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
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:
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 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.