I've recently completed bugfixing/testing on 4.14.1+no-naked-pointers, and 5.0 compatibility is not far behind (we're usually 1 or 2 compiler versions behind latest, e.g. current production releases are built using 4.13.1)
Disclaimer: I work on the XAPI project as part of my job, the project itself is >15 years old at this point.
I've recently completed bugfixing/testing on 4.14.1+no-naked-pointers, and 5.0 compatibility is not far behind (we're usually 1 or 2 compiler versions behind latest, e.g. current production releases are built using 4.13.1)
Disclaimer: I work on the XAPI project as part of my job, the project itself is >15 years old at this point.