westonpace commented on PR #13040:
URL: https://github.com/apache/arrow/pull/13040#issuecomment-1116417482
Ah, it seems `MapNode` had not previously ever been used outside of the
compute module. `file_base.cc` is in the datasets module. You will need to
add the appropriate exports to `MapNode`. This is an unfortunate process that
seems to be unique to Windows. This should be as simple as...
```
class ARROW_EXPORT MapNode : public ExecNode {
...
```
Although exposing things tends to have somewhat infectious consequences.
For example, I'm pretty sure you will then also need to expose `AtomicCounter`
since it is referenced by `MapNode`. However, that should be about it and it
makes sense to expose both of those things as they will be generally useful to
anyone building `ExecNode` implementations outside of Arrow.
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