Annex B is partially supported.
The following list gives language features that are not available:
Interfaces.C (Requires unconstrained arrays and strings)
Interfaces.C.Pointers (Requires unconstrained arrays and strings)
Interfaces.C.Strings (Requires unconstrained arrays and strings)
Interfaces.COBOL (Not Applicable for target)
Interfaces.FORTRAN (Not Applicable for target)