[ARROW-12982] [C++] Re-enable unused-variable warning

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 5.0.0
• Component/s: C++
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/28700
• Assignee: Weston Pace
• Reporter: Weston Pace
• Created: 05/Jun/21 02:46
• Updated: 11/Jan/23 08:30
• Resolved: 07/Jun/21 16:03

Description

I was playing around with cmake flags and at one point enabled all warnings.  I noticed that this warning has only one violation.  It's possible there are additional violations in some of the lesser built modules / integrations but we could also consider re-enabling the warning.

Issue Links

• links to: GitHub Pull Request #10458