|author||Adrian Taylor <email@example.com>||Fri May 01 13:33:36 2020 -0700|
|committer||Commit Bot <firstname.lastname@example.org>||Tue May 12 16:52:34 2020 +0000|
Cease to specify extern dirs for proc macro deps. Previously, if we had this arrangement: [Rust binary] -> depends on -> [Rust proc macro] -> depends on -> [Rust library] then the Rust library would be stored as a transitive dependency of the Rust binary. This was unnecessary because Rust procedural macros are complete standalone .so files, with no further references to the rlibs from which they are composed. The practical implication here is just a few extra unnecessary -Ldependency arguments to specify where to find such rlibs. However, subsequent commits use the list of transitive dependencies for more purposes, and this problem becomes more serious. Change-Id: I0310d60db1cab97fa6a808c9a08f663e53eba2ad Reviewed-on: https://gn-review.googlesource.com/c/gn/+/8300 Commit-Queue: Brett Wilson <email@example.com> Reviewed-by: Brett Wilson <firstname.lastname@example.org>
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.
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.