How can I make clang throw errors when the code is not strictly standard?

Question

I am writing a C ++ 11 library, and I want it to work with every compiler that supports C ++ 11. I don’t want to accidentally write code that is not standard (for example, uses language extensions such as VLA or blocks). How can I make clang disable all language extensions so that I can only write compatible code?

Answer 1

Try one of them :

-pedantic: Warn on language extensions. -pedantic-errors: Error on language extensions.