If the compilation fails because "no available Mac SDK is found" (in flutter-1.17 the build tool will only try to find Mac 10.XX SDKs), please modify the file "/src/build/Mac/find_sdk.py" under flutter root by setting "sdks" as your current sdk, e.g., ['11.0'].
### Creat symbolic
Create symbolic as follows. Flutter engine txt include skia header in this pattern 'third_party/skia/*', so without symbolic, the txt lib will include skia
header file in flutter engine, instead of headers in skia repo.
cmd
```
cd <uiwidigets_dir>\engine
cd third_party \\ create the directory if not exists
xingwei.zhu