Looks like a branch was created.  My scratch build failed on x86_64 with:

+ make check
make[1]: Entering directory '/builddir/build/BUILD/R-4.1.2/tests'
make[2]: Entering directory '/builddir/build/BUILD/R-4.1.2/tests'
make[3]: Entering directory '/builddir/build/BUILD/R-4.1.2/tests/Examples'
Testing examples for package 'base'
Error: testing 'base' failed
Execution halted

which isn't very informative.  Presumably it's being looked into?

FWIW, I need this for picosat.  Thanks Spot.

Looks like LTO needs to be disabled on EL9+ as well as Fedora 36+ due to an issue with double complex.  Spot - should I go ahead and do this?

This was already done for Fedora 36+ in [1]. You just need to "fix" that switch to consider EL9+ too, so I'd say go ahead.

[1] https://src.fedoraproject.org/rpms/R/c/c236b87ba9b7b7cd7ca3483c557a06ea965dbe29?branch=rawhide

FEDORA-EPEL-2022-5eb4de292b has been submitted as an update to Fedora EPEL 9. https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2022-5eb4de292b

Orion, thanks for taking this. I requested the branch and promptly got buried at work. :/ Nice work.

FEDORA-EPEL-2022-5eb4de292b has been pushed to the Fedora EPEL 9 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2022-5eb4de292b

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Happy to help.  Looks like we now neeed R-rpm-macros - see bug #2039606

FEDORA-EPEL-2022-5eb4de292b has been pushed to the Fedora EPEL 9 stable repository.
If problem still persists, please make note of it in this bug report.