On Windows, we now compile all core `.o`s twice, once with and without
`dllexport`, for use in the shipped dynamic and static libraries,
respectively. On other platforms, we export always as before to avoid
the duplicate work.
---------
Co-authored-by: tydeu <tydeu@hatpress.net>
- ignore unused variables in dep arrows
- avoid negated options
- make syntax stack generation more performant
- make ignore functions more extensible
- change message severity to `warning`
