Fix iOS sqlite3 linking issue

fixes #888

Co-Authored-By: Ross Savage <[email protected]>

ios/Podfile

@@ -46,6 +46,15 @@ post_install do |installer|
   installer.pods_project.targets.each do |target|
     flutter_additional_ios_build_settings(target)
      target.build_configurations.each do |config|
+       # Remove the -lsqlite3 linker flag
+       # https://github.com/CocoaPods/CocoaPods/issues/830
+       # We already include our own sqlite3 implementation via a pod,
+       # so we don't want the system-provided one as well.
+       xcconfig_path = config.base_configuration_reference.real_path
+       xcconfig = File.read(xcconfig_path)
+       new_xcconfig = xcconfig.sub('-l"sqlite3"', '')
+       File.open(xcconfig_path, "w") { |file| file << new_xcconfig }
+
        config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = deployment_target
        config.build_settings['SWIFT_VERSION'] = '5.0'
        config.build_settings['ENABLE_BITCODE'] = 'NO'