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This seems to be necessary for older compilers (e.g. gcc 8.5 on RHEL8)
See e.g. https://build.ros2.org/job/Hbin_rhel_el864__ur_calibration__rhel_8_x86_64__binary/23/console
This might be necessary for rolling, as well, but for rolling a lot of upstream dependencies are missing on RHEL before this gets relevant.
It might be beneficial to add RHEL builds to our pipeline based on https://github.com/ros-controls/ros2_rhel