> This is nice. Are there any parallelism capabilities?
Yes. It defaults to number-of-cores processes, but obviously can also be specified explicitly. One very nice part about it is that it'd work largely the same on windows (which has practically unusable testing right now). It probably doesn't yet, because I just tried to get it build and run tests at all, but it shouldn't be a lot of additional work.
The pidgin developers speak very highly of meson, for the same reasons already mentioned in this thread.