[llvm-dev] --enable-bindings=none equivalent with CMake

[Carsten Mattner via llvm-dev]

On Thu, Jan 14, 2016 at 6:31 PM, Dan Liew <dan at su-root.co.uk> wrote:
>>> What's the correct switch?
>>
>> Is there no switch?
>
> AFAICT there is no switch to disable the bindings. If you take a look
> at ``cmake/config-ix.cmake`` the only conditional guarding
> ``find_package(Ocaml)`` is ``WIN32``.
>
> The current behaviour looks like (for both OCaml and Go) if not on
> Windows CMake will try to detect them and if it fails the bindings
> will be disabled.
>
> I'd happily review a patch that adds the behaviour you want. You could
> add a CMake cache variable called LLVM_ENABLED_BINDINGS that is a list
> (i.e. separated by ``;``) of bindings to enable.
>
> We would need to decide what the different behaviours would need to
> be. In some circumstances you want the configure to continue even if
> certain things (e.g. OCaml) aren't found and in other situations (i.e.
> certain bindings were explicitly requested) you want the configure to
> fail if those things (e.g. OCaml) aren't found.
>
> One possible way would be to have the following possible list element values
>
> * ``auto``. Preserves the existing behaviour and is the default. This
> will try to enable all bindings, if a particular binding cannot be
> built then a non-fatal message will be emitted and configuring will
> continue. Mixing ``auto`` with other possible list element values is
> an error.
> * ``go`` - the go bindings
> * ``ocaml`` - the ocaml bindings
>
> Setting the list to empty would disable building all bindings.

Has there been any work here and can I set LLVM_ENABLED_BINDINGS
to an empty value to disable all language bindings?