Assume
a fictitious package directory pkgdir with
Scheme files apple.scm and orange.ss.
Files
scmxlate-apple.scm and scmxlate-orange.ss
at top-level.
File dialects-supported.scm in subdirectory
dialects. E.g., lines for dialects mzscheme,
guile, scsh.
File files-to-be-ported.scm in dialects
-- contains lines for apple.scm and orange.ss.
In dialects, files dialect-apple.scm
and dialect-orange.ss for each dialect supported.