talk/app/webrtc/objc/README

This directory contains the ObjectiveC implementation of the
webrtc::PeerConnection API.  This can be built for Mac or iOS.  This
file describes building the API, unit test, and AppRTCDemo sample app.

Prerequisites:
- Make sure gclient is checking out tools necessary to target iOS: your
  .gclient file should contain a line like:
  target_os = ['ios', 'mac']
  Make sure to re-run gclient sync after adding this to download the tools.

- Set up webrtc-related $GYP_DEFINES; example shell functions that set
  up for building for iOS-device, iOS-simulator, and Mac (resp) are:
function wrbase() {
  cd /path/to/webrtc/src
}

function wrios() {
  wrbase
  export GYP_DEFINES="$GYP_DEFINES OS=ios"
  export GYP_GENERATOR_FLAGS="$GYP_GENERATOR_FLAGS output_dir=out_ios"
  export GYP_CROSSCOMPILE=1
}

function wrios32() {
  wrios
  export GYP_DEFINES="$GYP_DEFINES target_arch=arm"
}

function wrios64() {
  wrios
  export GYP_DEFINES="$GYP_DEFINES target_arch=arm64"
}

function wrsim() {
  wrbase
  export GYP_DEFINES="$GYP_DEFINES OS=ios target_subarch=arm32 target_arch=ia32"
  export GYP_GENERATOR_FLAGS="$GYP_GENERATOR_FLAGS output_dir=out_sim"
  export GYP_CROSSCOMPILE=1
}

function wrmac() {
  wrbase
  export GYP_DEFINES="$GYP_DEFINES OS=mac target_subarch=arm64 target_arch=x64"
  export GYP_GENERATOR_FLAGS="$GYP_GENERATOR_FLAGS output_dir=out_mac"
}

- Finally, run "webrtc/build/gyp_webrtc.py" to generate ninja files.

Example of building & using the unittest & app:

- To build & run the unittest (must target mac):
  wrmac && ./webrtc/build/gyp_webrtc.py && \
      ninja -C out_mac/Debug libjingle_peerconnection_objc_test && \
      ./out_mac/Debug/libjingle_peerconnection_objc_test.app/Contents/MacOS/libjingle_peerconnection_objc_test

- To build & launch the sample app on OSX:
  wrmac && ./webrtc/build/gyp_webrtc.py && ninja -C out_mac/Debug AppRTCDemo && \
      ./out_mac/Debug/AppRTCDemo.app/Contents/MacOS/AppRTCDemo

- To build & launch the sample app on the iOS simulator:
  wrsim && ./webrtc/build/gyp_webrtc.py && ninja -C out_sim/Debug iossim AppRTCDemo && \
      ./out_sim/Debug/iossim out_sim/Debug/AppRTCDemo.app

- To build & sign the sample app for an iOS device (32 bit):
  wrios32 && ./webrtc/build/gyp_webrtc.py && ninja -C out_ios/Debug-iphoneos AppRTCDemo

- To build & sign the sample app for an iOS device (64 bit):
  wrios64 && ./webrtc/build/gyp_webrtc.py && ninja -C out_ios/Debug-iphoneos AppRTCDemo