[ARROW-8608] [C++] Update vendored mpark/variant.h to latest to fix NVCC compilation issues

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.17.1, 1.0.0
• Component/s: C++
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/24772
• Assignee: Paul Taylor
• Reporter: Mark Harris
• Created: 28/Apr/20 00:19
• Updated: 11/Jan/23 08:01
• Resolved: 01/May/20 17:59

Description

Arrow vendors https://github.com/mpark/variant. The vendored version is  from 2019, which has issues compiling with NVCC (CUDA compiler). Projects like cuDF that depend on Arrow are stuck on a version of Arrow from before this dependency was added because they can't compile. 

mpark/variant's two most recent PRs are fixes for NVCC compilation. 

We would like to move cuDF forward to Arrow 0.16 or 0.17 soon, so it would be great to update the version mpark/variant in Arrow.

Issue Links

• links to: GitHub Pull Request #7053