Added a public GN config to compile mock headers.

Due to bugs.webrtc.org/216 code that includes
//webrtc/modules/audio_device:mock_audio_device fails to compile on
Windows unless a warning flag is switched off. It seems that
googlemock changes types of overridden virtual method parameters from
'const int' to 'int', which causes the VS compiler to report an error.

The problem was not solved by suppressing the flag wd4373 in
//webrtc/modules/audio_device:mock_audio_device, because targets that
include the headers are compiled separately.

This CL adds the flag suppression to the GN variable
|all_dependent_configs|. Then GN will apply the configuration to all
reachable dependencies. This is needed to reduce clutter and extra
conditions in dependency build targets.

The reason for |all_dependent_configs| before |public_configs| is
for a situation in which a targets headers include the headers from
this target. Then dependencies of dependencies will have a copy of
this targets' code after preprocessing, and compilation will fail.
This will happen if we e.g. change mock_voice_engine to return a
MockAudioTransport or MockAudioDevice.

This change has been tested by compiling a dependent CL
(https://codereview.webrtc.org/2454373002/) which uses these mocks
on Windows without suppressing the flag.

There is no GYP change, because test code has been removed from GYP.

NOTRY=True
BUG=webrtc:216

Review-Url: https://codereview.webrtc.org/2492713003
Cr-Commit-Position: refs/heads/master@{#15024}
1 file changed
tree: cc04c45481350312cd96326abf617aca55368a72
  1. build_overrides/
  2. chromium/
  3. data/
  4. infra/
  5. resources/
  6. third_party/
  7. tools/
  8. webrtc/
  9. .clang-format
  10. .git-blame-ignore-revs
  11. .gitignore
  12. .gn
  13. all.gyp
  14. AUTHORS
  15. BUILD.gn
  16. check_root_dir.py
  17. codereview.settings
  18. DEPS
  19. LICENSE
  20. license_template.txt
  21. LICENSE_THIRD_PARTY
  22. OWNERS
  23. PATENTS
  24. PRESUBMIT.py
  25. pylintrc
  26. README.md
  27. setup_links.py
  28. sync_chromium.py
  29. WATCHLISTS
README.md

WebRTC is a free, open software project that provides browsers and mobile applications with Real-Time Communications (RTC) capabilities via simple APIs. The WebRTC components have been optimized to best serve this purpose.

Our mission: To enable rich, high-quality RTC applications to be developed for the browser, mobile platforms, and IoT devices, and allow them all to communicate via a common set of protocols.

The WebRTC initiative is a project supported by Google, Mozilla and Opera, amongst others. This page is maintained by the Google Chrome team.

Development

See http://www.webrtc.org/native-code/development for instructions on how to get started developing with the native code.

More info