I want to do boost builds in parallel by default, e.g. instead of ./b2 -j4 I want to just invoke ./b2 and have it use -j4, or -jN for some other relevant N, itself.
Can I do this? I was thinking maybe I could put in tools/build/src/user-config.jam somehow, but I'm not really well-versed enough in how that works.
Bonus points if I don't have to enter a value manually but have it determined by something like nproc, dynamically before building.