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From a quick search it's possible OSX isn't detected properly and then options only supported by GCC (and not Clang) are specified by CMake.

I'd suggest opening issues on the issue trackers of the packages you mention.

If/when you do, please post a comment here with a link to the issue you opened, so we can keep things connected.

From a quick search it's possible OSX isn't detected properly and then options only supported by GCC (and not Clang) are specified by CMake.CMake. This also doesn't appear to be Big Sur specific. It happened to people back in 2011 already.

I'd suggest opening issues on the issue trackers of the packages you mention.

If/when you do, please post a comment here with a link to the issue you opened, so we can keep things connected.

Edit: Additionally, there is a current discussion about ROS 2 on macOS on ROS Discourse: macOS support in ROS 2 Galactic and beyond. Link to Github issue tracking these (new) efforts: ros2/ros2#1148.

They don't mention your issue specifically, so either it's new, or there is something else not correct in your setup/approach.


From a quick search it's possible OSX isn't detected properly and then options only supported by GCC (and not Clang) are specified by CMake. This also doesn't appear to be Big Sur specific. It happened to people back in 2011 already.

I'd suggest opening issues on the issue trackers of the packages you mention.

If/when you do, please post a comment here with a link to the issue you opened, so we can keep things connected.