Flutter iOS jit_release engine +

编译jit_release engine

$./flutter/tools/gn --runtime-mode jit_release --ios
$./flutter/tools/gn --runtime-mode jit_release --ios --ios-cpu=arm
$./flutter/tools/gn --runtime-mode jit_release
$ninja -C out/ios_jit_release
$ninja -C out/ios_jit_release_arm
$ninja -C out/host_jit_release

修改Generated.xcconfig

LOCAL_ENGINE=ios_jit_release
FLUTTER_ENGINE=~/Desktop/Workspace/engine/src
FLUTTER_BUILD_MODE=debug
VERBOSE_SCRIPT_LOGGING=YES

可能需要复制一份gen_snapshot到clang_x64下改名gen_snapshot_arm64

修改xcode_backend.sh

//去掉debug和relase检测的代码
if [[ $(echo "$LOCAL_ENGINE" | tr "[:upper:]" "[:lower:]") != *"$build_mode"* ]]; then
      EchoError "========================================================================"
      EchoError "ERROR: Requested build with Flutter local engine at '${LOCAL_ENGINE}'"
      EchoError "This engine is not compatible with FLUTTER_BUILD_MODE: '${build_mode}'."
      EchoError "You can fix this by updating the LOCAL_ENGINE environment variable, or"
      EchoError "by running:"
      EchoError "  flutter build ios --local-engine=ios_${build_mode}"
      EchoError "or"
      EchoError "  flutter build ios --local-engine=ios_${build_mode}_unopt"
      EchoError "========================================================================"
      exit -1
    fi

生成flutter_assert

$flutter build bundle --release