[MacPorts] #69975: re2 at 2024-04-01_2: fails to build on macOS 10.12/Xcode 9.2 due to <optional> not found in abseil headers

[MacPorts]

#69975: re2 at 2024-04-01_2: fails to build on macOS 10.12/Xcode 9.2 due to <optional>
not found in abseil headers
----------------------+-------------------------
  Reporter:  andlabs  |      Owner:  herbygillot
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.9.3
Resolution:           |   Keywords:
      Port:  re2      |
----------------------+-------------------------
Changes (by andlabs):

 * Attachment "main.log" added.

 build log

-- 
Ticket URL: <https://trac.macports.org/ticket/69975>
MacPorts <https://www.macports.org/>
Ports system for macOS