No SOURCES given to target: __CMAKE__CXX26 on ubuntu 25.04

Yep, that’s an example of a packager bug report, as Ubuntu is a packager of GCC.

For any packager who has a bugged compiler package, it’s on them to figure out how to fix their package.

Obviously we’re here to help anyone who needs it, but CMake can’t be arbitrarily re-arranging files in a given distro’s package.