ASDF-FLV provides support for file-local variables through ASDF. A file-local
variable behaves like *PACKAGE* and *READTABLE* with respect to LOAD and
COMPILE-FILE: a new dynamic binding is created before processing the file,
so that any modification to the variable essentially becomes file-local.
In order to make one or several variables file-local, use the macros
SET-FILE-LOCAL-VARIABLE(S).
For portability with the Genera system, the GitHub repository has a genera branch (thanks to Steve Nunez).