I compiled the stable kernel 4.14.8 for the X5000 and X1000 on a virtual ubuntu MATE 16.04.3 LTS PowerPC machine (virtual PowerMac G4 QEMU machine on a Core i7 host) today. (see screenshot)
Screenshot of ubuntu MATE 16.04.3 LTS PowerPC with the Freescale community kernel 4.14.13 and with the new game Project::OSiRiON from Casey's repository on an AmigaOne X5000: