I meant to add to the previous message:
I note that the documentation on submitting patches says that patches
must land in master before being applied to a stable release. In this
case, the autotools files have been removed in master, but I think it
is still worth considering applying this patch
The meson build system already has these checks. I've just copied them
to autotools.
Without this, state trackers could be enabled when building with the
following set of options, which resulted in a compile error due to VL
being built without DRM.
--enable-autotools
