Closed-source third-party library

To create a Flutter plugin that includes Dart
source code, but distribute the C/C++ library
in binary form, use the following instructions:

In your plugin project,
open ios/<myproject>.podspec.

Add a vendored_frameworks field.
See the CocoaPods example.

Warning:
  Do not upload this plugin
  (or any plugin containing binary code) to pub.dev.
  Instead, this plugin should be downloaded
  from a trusted third-party,
  as shown in the CocoaPods example.

Stripping iOS symbols

When creating a release archive (IPA),
the symbols are stripped by Xcode.

In Xcode, go to Target Runner > Build Settings > Strip Style.

Change from All Symbols to Non-Global Symbols.