[vtk-developers] [ANNOUNCE] New module system landing

[Ben Boeckel]

On Wed, Jan 02, 2019 at 14:23:53 -0500, Ben Boeckel wrote:
>       - `Module_<MMM>` -> `VTK_MODULE_ENABLE_<MMM>`
>       - `VTK_USE_SYSTEM_<MMM>` -> `VTK_MODULE_USE_EXTERNAL_<MMM>`

So after some fiddling around with Buildbot, it turns out that putting
`::` in cache variable names makes it really hard to pass them on the
command line. The cache variables have `::` replaced with `_`.

The buildbot cleanup work is ongoing in:

    https://gitlab.kitware.com/vtk/vtk/merge_requests/5039

--Ben