Parses user-firendly options into coder-firendly specifics.
Generates a file used to implement C constants as "constant subroutines" in a Perl module.
Extracts a list of constants from a module's export list by evaling the
first part of the Module's *.pm file and then requesting some groups of
symbols be exported/imported into a dummy package. Then writes C or C++
code that can convert each C constant into a Perl "constant subroutine"
whose name is the constant's name and whose value is the constant's value.
