Import changes for goma client

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Bug: b/286479835
GitOrigin-RevId: 0bd90576dddc384ddc5b593ba8acd1be1928836e
Change-Id: I4b9bf0d5ebd96126d43f9c2a233f093b5c7990ec
176 files changed
tree: 35cb6f970b1df12b14c8609f0169422c72496ab0
  1. base/
  2. benchmark/
  3. build/
  4. client/
  5. doc/
  6. go/
  7. infra/
  8. lib/
  9. test/
  10. testing/
  11. third_party/
  12. tools/
  13. .clang-format
  14. .gitallowed
  15. .gitignore
  16. .gn
  17. .style.yapf
  19. codereview.settings
  21. DEPS
  23. OWNERS

Goma client

Goma is a distributed compiler service for open-source project such as Chromium and Android. It's some kind of replacement of distcc+ccache.

NOTE: For non-Googler usage, please see Goma for Chromium Contributors.

Google employees interested in contributing to the goma client should use internal version. see http://go/ma-client-code

How Goma works

Goma hooks a compile request, and sends it to a backend compile server. If you have plenty of backend servers, a lot of compile can be processed in parallel, for example, -j100, -j500 or -j1000.

Also, the Goma backend caches the compile result. If the same compile request comes, the cached result is returned from the Goma cache server.

How to build

Goma client can be built on Linux, Mac, and Win.


  1. Use 64bit platform (Linux, Mac or Win).
  2. Install depot_tools.
  3. Install dependencies.
    • On Mac, install Xcode.
    • On Windows, install Visual Studio 2017. Community edition is OK.

Checkout source

$ mkdir goma && cd goma
$ gclient config
$ gclient sync
$ cd client

We assume the Goma client code is checked out to ${GOMA_SRC}. You can set this in your environment, but do not export it as it will make gomacc complain.

If you want to develop goma client, make goma client source unmanaged by gclient. Open .gclient file, and check "managed" value. If it's True, changed it to False. Otherwise, gclient will manage your repository, so your checkout can be unintentionally changed with gclient sync.

Move to client directory (which is under git repo), and configure git repository with your username and emails.

$ cd client
$ git config ''
$ git config 'Your Name'


$ cd "${GOMA_SRC}/client"
$ gclient sync
$ gn gen --args="is_debug=false" out/Release
$ ninja -C out/Release

Several important gn args

The build option can be modified with gn args.

  Do debug build if true.
  Enable DCHECK always (even in release build).
  Use ASan build (with clang).
  Currently working only on Win. If true, /LTCG is enable.
  Use lld for link (it will be fast)

Run unittest

$ cd "${GOMA_SRC}/client"
$ ./build/ --target=Release --build-dir=out

Coding style

Follow Google code style.

For C++11/14 features, we prefer to follow Chromium's guidelines.

How to use

For Chromium development

Goma can be integrated with Chromium development easily.

  1. Build goma client
  2. Start compiler_proxy
$ "${GOMA_SRC}/client/out/Release/" start

For Chromium

In Chromium src, specify the following args in gn args

use_goma = true
goma_dir = "${GOMA_SRC}/client/out/Release"  (Replace ${GOMA_SRC} to your checkout)

Then build like the following:

$ cd /path/to/chromium/src/out/Release
$ ninja -j100 chrome

More details are avairable in chromium's build instructions.

For general development

  1. Build Goma client
  2. Start compiler_proxy
$ ./ ensure_start
  1. Change your build script so that gomacc is prepended to compiler command. For example:
$ gomacc clang++ -c
  1. Build your product with make -j100, ninja -j100 or larger -j. Check http://localhost:8088 to see compiler_proxy is actually working.
  • You can use autoninja in depot_tools instead of specifying gomacc manually.