https://clang.llvm.org/docs/AttributeReference.html#cleanup. We use it in severa...

https://clang.llvm.org/docs/AttributeReference.html#cleanup. We use it in several projects and compile those with clang.

Here's nbdkit compiled with clang 14:

  checking whether clang is Clang... yes
  [...]
  checking if __attribute__((cleanup(...))) works with this compiler... yes