rtpsw commented on code in PR #14385:
URL: https://github.com/apache/arrow/pull/14385#discussion_r994883955
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cpp/src/arrow/engine/substrait/options.h:
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@@ -32,7 +36,7 @@ namespace engine {
/// How strictly to adhere to the input structure when converting between
Substrait and
/// Acero representations of a plan. This allows the user to trade conversion
accuracy
/// for performance and lenience.
-enum class ConversionStrictness {
+enum class ARROW_ENGINE_EXPORT ConversionStrictness {
Review Comment:
It's a [visibility
macro](https://github.com/apache/arrow/pull/14385/files#diff-e803a80147d4db13f4a3eee8126ce922ca91a6c6c2295ca3c60d292514c66d1fR22).
It tells the linker to export the symbols for the construct following it.
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