Flutter or React Native Xcode 15 Error (Xcode): DT_TOOLCHAIN_DIR cannot be used to evaluate LIBRARY_SEARCH_PATHS

UPDATE: This issue is resolved in the latest cocaopod version.

Command to upgrade: brew upgrade cocoapods

so if you install that you shouldn’t need the solutions below:

Solution 1:
Add this code to your podfile

post_install do |installer|
  installer.pods_project.targets.each do |target|
     flutter_additional_ios_build_settings(target)
      target.build_configurations.each do |config|
        xcconfig_path = config.base_configuration_reference.real_path
        xcconfig = File.read(xcconfig_path)
        xcconfig_mod = xcconfig.gsub(/DT_TOOLCHAIN_DIR/, "TOOLCHAIN_DIR")
        File.open(xcconfig_path, "w") { |file| file << xcconfig_mod }
      end
  end
end

After that run a pod update (make sure that the iOS folder is the current directory before running pod update).

pod update

Solution 2: Issues while building iOS project with flutter

Check out this for multi flavour config.

Solution 3:
if you use inAppWebview for flutter then come error like this :

Parse Issue (Xcode): Could not build module ‘WebKit’

So you can add in Your pubspec.yaml file Like this:

flutter_inappwebview:
    git:
      url: https://github.com/Estrelio/flutter_inappwebview.git
      ref: fix-xcode-17  

Solution 4 (For non-flutter users):

Remove the below line from the script.

flutter_additional_ios_build_settings(target)