[C++] Update bundled RE2

Open Beginner friendly

#50,155 opened on Jun 11, 2026 0 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 2/5
Estimated time: 1-3 hours
Newbie friendliness: 68/100

Issue type: Feature
Clarity: Mostly clear
Activity status: Quiet
Tech stack: cpp
Domain: build-system

Research direction

Start with cpp/thirdparty/versions.txt at the linked entry and review the constraint from GH-48010. Determine the latest compatible RE2 version and whether Abseil can now be used on CRAN; done means updating the bundled dependency information consistently.

Written by the indexing model from the issue text.

Description

Component: C++ Type: enhancement

Describe the enhancement requested

We're using 2023-03-01 because of GH-48010:

https://github.com/apache/arrow/blob/ee0d861d2bf342272920ae7213b594a18154f7bf/cpp/thirdparty/versions.txt#L100-L104

Can we upgrade to the latest re2 now? (Can we use Abseil on CRAN now?)

Component(s)

C++

Dominant language: C++
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