Description of problem: The urdfdom-headers package is built for EPEL 7, but there is no build for EPEL 8. I found that the current rawhide branch builds successfully against EPEL 8, except for a small part of the Fedora patch that was updated in the latest release for Fedora.
Branch requested: https://pagure.io/releng/fedora-scm-requests/issue/32276
FEDORA-EPEL-2021-56f9b1b656 has been submitted as an update to Fedora EPEL 8. https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2021-56f9b1b656
FEDORA-EPEL-2021-56f9b1b656 has been pushed to the Fedora EPEL 8 testing repository. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2021-56f9b1b656 See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
FEDORA-EPEL-2021-56f9b1b656 has been pushed to the Fedora EPEL 8 stable repository. If problem still persists, please make note of it in this bug report.