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BUILD_WEBRTC.md

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Build WebRTC

1. Prerequisites

  • At least 30 GB of free disk space

  • Matching macOS and Xcode version (see Versions)

2a. Setup Fresh Build

  1. Change to your iOS-Project folder

    cd /path/to/your/ios-project

  2. Create a new folder and go into it

    mkdir WebRTC-build
cd WebRTC-build

  3. Clone depot tools and add them to your current PATH

    git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git
export PATH=$(PWD)/depot_tools:$PATH

  4. Choose and set WebRTC and patch commit to use (see Versions below)

    export COMMIT=commit_id
export PATCH_COMMIT=patch_commit_id

# e.g.
# export COMMIT=b83487f08ff836437715b488f73416215e5570dd
# export PATCH_COMMIT=e8c6ee36392fb167a96d9c808f6d4638510c3178

  5. Fetch a regular WebRTC checkout with the iOS-specific parts added. (This might take a while...)

    fetch --nohooks webrtc_ios

  6. Get patches

    git clone https://github.com/threema-ch/webrtc-build-docker.git
cd webrtc-build-docker

    (The patches are part of our WebRTC PeerConnection Build Script.)

2b. Setup Rebuild

  1. Reset applied patches

    cd WebRTC-build/src
git reset --hard

  2. Add depot_tools to your current PATH

    export PATH=$(PWD)/depot_tools:$PATH

  3. Choose and set WebRTC and patch commit to use (see Versions below)

    export COMMIT=commit_id
export PATCH_COMMIT=patch_commit_id

  4. Update patches

    cd ../webrtc-build-docker
git checkout master && git pull origin master

3. Checkout and Apply Patches

  1. Check out patch commit

    git checkout $PATCH_COMMIT

  2. Go into src folder and checkout WebRTC. (This might take a while...)

    cd ../src
git checkout master && git pull && git checkout $COMMIT && gclient sync

  3. Apply patches

    for i in ../webrtc-build-docker/patches/*.patch; do patch -p1 < $i; done

4. Build

  1. Build

    tools_webrtc/ios/build_ios_libs.py --output-dir ../out/ --extra-gn-args symbol_level=1 enable_libaom=false rtc_include_dav1d_in_internal_decoder_factory=false rtc_include_ilbc=false

  2. Remove existing framework and move to correct location

    rm -r ../../WebRTC.xcframework
mv ../out/WebRTC.xcframework ../../

5. (Optional) Remove temporary build folder WebRTC-build

cd ../..
rm -r WebRTC-build

Versions

iOS App Version WebRTC Commit Patch Commit macOS Version Xcode Version WebRTC Binary Version
5.9.1 41b1493ddb5d98e9125d5cb002fd57ce76ebd8a7 (m123) 86a2fd8f10ac57e1ea16e0be37b337976e383338 14.4.1 (23E224) 15.3 (15E204a) 123.0
5.9 b0cc68e61205fd11a7256a6e85307ec17ad95790 (m120) 785df490a6de4b8f0b2496eede260f060c0dd0ee 14.3.1 (23D60) 15.2 (15C500b) 120.0
5.6 151be743d4c83671565f9c1eada3f4a0b2e44dea (m114) 07bf304f62e536217dad166ca9a603cad9d61e7e 13.5 (22G74) 14.3.1 (14E300c) 114.0
Group-Calls-Branch 218b56e516386cd57c7513197528c3124bcd7ef3 (m110) d49a6318dbb90665684c9d6cda083416912d5086 13.3.1 (a) (22E772610a) 14.2 (14C18) 110.0
4.8.0 (2741) ffd9187dc0d9211ad52173bf0daa5001ca7d45ee (m100) 92e9bfefac342b2c2547cd860844f9bf7fd36252 12.4 (21F79) 13.2.1 (13C100) 100.0.0