https://bugs.freedesktop.org/show_bug.cgi?id=94410
--- Comment #6 from Timothee Besset ttimo@ttimo.net --- Not likely to be a radeon bug, but here is a possible solution for UE4 4.16:
17:18 <@rcl> if 4.16, remove the linker script 17:18 <@rcl> and try again 17:19 <@rcl> drivers aren't siloed from our new/delete and are probably allocating memory through UE, a user program
(see LinuxToolChain.cs)
If someone can try that and report, that would help.