re2 @2024-04-01: fatal error: 'filesystem' file not found

[workflowsguy]

Trying to update & build the re2 package (@2024-04-01_2). It built previously, but now fails with

--->  Computing dependencies for re2
--->  Fetching archive for re2
--->  Attempting to fetch re2-2024-04-01_2.darwin_17.x86_64.tbz2 from http://packages.macports.org/re2
--->  Attempting to fetch re2-2024-04-01_2.darwin_17.x86_64.tbz2 from http://nue.de.packages.macports.org/re2
--->  Attempting to fetch re2-2024-04-01_2.darwin_17.x86_64.tbz2 from http://cph.dk.packages.macports.org/re2
--->  Building re2
Error: Failed to build re2: command execution failed
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_re2/re2/main.log for details.
Error: Follow https://guide.macports.org/#project.tickets if you believe there is a bug.
Error: Processing of port re2 failed

The error log is attached

[ryandesign (Ryan Carsten Schmidt)]

Log says:

fatal error: 'filesystem' file not found

std::filesystem is only available on macOS 10.15 and later and I see you're on macOS 10.13.

Alternative: the port could try to use the legacysupport portgroup's feature of using a newer MacPorts copy of libc++. Consequences unknown.

[jmroot (Joshua Root)]

Recently abseil switched to compiler.cxx_standard 2017, which apparently means all dependents now have to use the same, but the dependents were not updated so re2 is still using 2014.

[ryandesign (Ryan Carsten Schmidt)]

Replying to jmroot:

Recently abseil switched to compiler.cxx_standard 2017, which apparently means all dependents now have to use the same, but the dependents were not updated so re2 is still using 2014.

​https://github.com/macports/macports-ports/pull/23963

[ryandesign (Ryan Carsten Schmidt)]

Has duplicate #70094.