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https://issues.apache.org/jira/browse/ARROW-14204?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17423467#comment-17423467
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Eduardo Ponce commented on ARROW-14204:
---------------------------------------

Should we consider this bug as motivation to have at least one CI build without 
RE2?

> [C++] Fails to compile Arrow without RE2 due to missing ifdef guard
> -------------------------------------------------------------------
>
>                 Key: ARROW-14204
>                 URL: https://issues.apache.org/jira/browse/ARROW-14204
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: C++
>            Reporter: Eduardo Ponce
>            Assignee: Eduardo Ponce
>            Priority: Major
>             Fix For: 6.0.0
>
>
> [*RegexSubstringMatcher* is available only when RE2 is enabled as it is 
> guarded by an #ifdef 
> macro|https://github.com/apache/arrow/blob/master/cpp/src/arrow/compute/kernels/scalar_string.cc#L861-L862]
>  but it is [used here without the RE2 
> guard|https://github.com/apache/arrow/blob/master/cpp/src/arrow/compute/kernels/scalar_string.cc#L1113],
>  so it compilation fails.



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