building csky with CC=clang

[Nick Desaulniers]

Hello!
I was playing with some of LLVM's experimental backends (m68k) and saw
there was a CSKY backend. I rebuilt LLVM to support CSKY, but I ran
into trouble building the kernel before even getting to the compiler
invocation:

$ ARCH=csky CROSS_COMPILE=csky-linux-gnu- make CC=clang -j71 defconfig
...
scripts/Kconfig.include:40: linker 'csky-linux-gnu-ld' not found

My distro doesn't package binutils-csky-linux-gnu, is there
documentation on how to build the kernel targeting CSKY, starting with
building GNU binutils configured with CSKY emulation?
-- 
Thanks,
~Nick Desaulniers