We need a way to pass flags to rombuilds in Raptor via extension flm interfaces, so that the CPP pass of the rom input files can be informed what toolchain we are building with and conditionally include or exclude files depending on whether the toolchain could build them.

<?xml version="1.0" encoding="UTF-8"?>
<relnotes name="User HAL">
  <purpose>
    User side access to hardware via hardware abstraction.
  </purpose>
</relnotes>