In the ASN1 User's Guide Section 1.3.1 Compile-time Functions
it describes using the erlc program. It incorrectly gives the
syntax "-i IncludeDir" but in fact it requires a capital 'I'
as in "-I IncludeDir".
Where to search for .asn1db files with info about types and
values imported from other modules. This option can be repeated
many times if there are several places to search in. The compiler
will always search the current directory first.