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(I2P) :: scalar_I2 call b64_decode(code='Nf8=',n=scalar_I2) print "(L1)", scalar_I2==-203_I2P endprogram volatile_doctest