Due to swig using a hardcoded swig library path in self-compiled
variants, we need to pass our custom swig library path with every
invocation of swig on macOS.
CMake's `add_custom_command` function does _not_ inherit the environment
variables used during configuration, hence why it needs to be passed
explicitly on invocation.
Usage of CMake's "-E env" command module should allow for cross-platform
compatible invocation.
Status output related to OBS configuration is prefixed with the string
"OBS" and added padding for enabled and disabled features. This padding
was not aligned between platforms.
By moving the padding and prefix decoration into its own function,
both elements are controlled in a single place. CMake scripts were
changed to use this new function `obs_status` instead of using CMake's
`message` function directly.
obs-scripting CMakeList.txt expects SWIG, Python3 or Luajit to enable
scripting so in case of not finding just return and don't abort
the configuration
This adds build-time options for disabling the Lua and/or Python
scripting support in cases where users do not wish to build
it, but have the required libraries installed.
Makes it so that the scripting cmake variable ENABLE_SCRIPTING is a user
variable rather than a global internal cmake variable, and defers the
internal global cmake variable to SCRIPTING_ENABLED instead.
