https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88920
--- Comment #23 from Andrew Stubbs <ams at gcc dot gnu.org> --- It's caused by the llvm_binutils check, which is used by pretty much every test to determine whether to complain about blank lines in compile output, or not. Right now the easiest way to determine if it's using that toolchain is to check if the target is amdgcn (that being the only target that needs it). I suppose llvm could also be detected by inspecting the --version output from <target>-as, or some such. Your configuration isn't to blame.
