Re: [PATCH v2] kbuild: Make $(LLVM) more flexible

[Matthew Wilcox]

On Mon, Mar 07, 2022 at 11:08:29AM -0800, Nick Desaulniers wrote:
> > +``LLVM=0`` is not the same as omitting ``LLVM`` altogether, it will behave like
> > +``LLVM=1``.
> 
> Hmm... I can see someone's build wrappers setting LLVM=1, then them
> being surprised that appending LLVM=0 doesn't disable LLVM=1 as they
> might expect.  But Masahiro says let's fix this later which is fine.

What happens if you say LLVM= instead of LLVM=0 ?  Would that "undo"
a prior LLVM=1 and use GCC instead?