Runtime linker

Hello, My personal project involves making a port of GHC for an almost bare-bones environment, which doesn't provide runtime linking support. GHC configure script sets `TargetHasRTSLinker` flag, but it seems to be ignored in RTS itself, and the linker is built regardless. Is this a regression, perhaps due to the migration from Makefiles to Hadrian? Or is building RTS without runtime linker no longer supported? Thank you.