"If Fortran (respectively, C) is widely supported in the target environment, implementations supporting the Numerics Annex should provide the child package
Interfaces.Fortran(respectively,Interfaces.C) specified in Annex B and should support aconvention_identifierof Fortran (respectively, C) in the interfacing pragmas (see Annex B), thus allowing Ada programs to interface with programs written in that language."
Followed.