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https://issues.apache.org/jira/browse/ARROW-2167?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16367766#comment-16367766
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Phillip Cloud commented on ARROW-2167:
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Ok, I will take a closer look at that PR.
> [C++] Building Orc extensions fails with the default
> BUILD_WARNING_LEVEL=Production
> -----------------------------------------------------------------------------------
>
> Key: ARROW-2167
> URL: https://issues.apache.org/jira/browse/ARROW-2167
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Affects Versions: 0.8.0
> Reporter: Phillip Cloud
> Priority: Major
> Fix For: 0.9.0
>
>
> Building orc_ep fails because there are a bunch of upstream warnings like not
> providing {{override}} on virtual destructor subclasses, and using {{0}} as
> the {{nullptr}} constant and the default {{BUILD_WARNING_LEVEL}} is
> {{Production}} which includes {{-Wall}} (all warnings as errors).
> I see that there are different possible options for {{BUILD_WARNING_LEVEL}}
> so it's possible for developers to deal with this issue.
> It seems easier to let EPs build with whatever the default warning level is
> for the project rather than force our defaults on those projects.
> Generally speaking, are we using our own CXX_FLAGS for EPs other than Orc?
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