Whilst trying to track down a code generation issue with the jit, a user noted that gcc_jit_context_dump_to_file resembles C, but isn't C, and that it would be useful if it was compileable as C, so that we can compare the C frontend with the jit:
  https://gcc.gnu.org/ml/jit/2015-q3/msg00021.html

Specific pain-points were:
  1) types are in wrong order
  2) function types are incorrectly output
  3) array types are incorrectly output

(in that mail "4) in one case as least a pointer was missing." turned out to be user error).