The problem “xcode-select: Failed to locate ‘clang’, requesting installation of command line developer tools” is seen when you are working on XCode and try to run the clang command in your system terminal.
xcode-select: Failed to locate 'clang', requesting installation of command line developer tools

The problem, “xcode-select: Failed to locate ‘clang’, requesting installation of command line developer tools” is seen because the XCode packages you are using are out of date and you will have to update those in order to run your applications smoothly.
To fix the error “xcode-select: Failed to locate ‘clang’, requesting installation of command line developer tools”, update your XCode packages in your system by running the command “xcode packages: xcodebuild -runFirstLaunch
“.
Additionally, if you launch Xcode and use the pre-selected runtime tools (in my case, MacOS and iOS), clang should function normally.
Steps to Fix the problem “xcode-select: Failed to locate ‘clang’, requesting installation of command line developer tools”:
To fix the error you will have to update all your XCode packages in your system by running the command to update all your XCode packages: xcodebuild -runFirstLaunch
.
You will have to update your xcode, then after the update, launching Xcode and approving the request to load the necessary development tools (for macOS and iOS).
Additionally, if you launch Xcode and use the pre-selected runtime tools (in my case, MacOS and iOS), clang should function normally.
This should help you fix and understand the problem, “xcode-select: Failed to locate ‘clang’, requesting installation of command line developer tools “.
Conclusion
You must update your XCode packages on your system by executing the necessary commands in order to resolve the issue “xcode-select: Failed to locate “clang,” asking installation of command line developer tools.” To update all of your xcode packages, use the given command: xcodebuild -runFirstLaunch.
The issue is seen because the XCode packages you are using are out of date and you will have to update those in order to run your applications smoothly.