[kernel] Parsing tests/syntax/c11-keywords.c (with preprocessing)
[kernel] tests/syntax/c11-keywords.c:12: Failure: 
  _Alignas is currently unsupported by Frama-C.
[kernel] User Error: stopping on file "tests/syntax/c11-keywords.c" that has errors. Add
  '-kernel-msg-key pp' for preprocessing command.
[kernel] Frama-C aborted: invalid user input.