ARROW-14705: [C++] Add missing export

apache · Dec 20, 2021 · ee3be7c · ee3be7c
1 parent 76585b1
commit ee3be7c
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/cpp/src/arrow/type.h b/cpp/src/arrow/type.h
@@ -303,7 +303,7 @@ class ARROW_EXPORT Field : public detail::Fingerprintable {
   /// \brief Options that control the behavior of `MergeWith`.
   /// Options are to be added to allow type conversions, including integer
   /// widening, promotion from integer to float, or conversion to or from boolean.
-  struct MergeOptions : public util::ToStringOstreamable<MergeOptions> {
+  struct ARROW_EXPORT MergeOptions : public util::ToStringOstreamable<MergeOptions> {
     /// If true, a Field of NullType can be unified with a Field of another type.
     /// The unified field will be of the other type and become nullable.
     /// Nullability will be promoted to the looser option (nullable if one is not