Nodes of different colours represent the following:
Solid arrows point from a file to a file which depends upon it. A file is dependent upon another if the latter must be compiled before the former can be.
program volatile_doctest use befor64 use befor64 use penf integer(I1P) :: scalar_I1 call b64_decode(code='eA==',n=scalar_I1) print "(L1)", scalar_I1==120_I1P endprogram volatile_doctest