I don't think there's a setting, but see the Base.compilecache function. You could define in your .juliarc.jl a wrapper around Pkg.update that calls update then recompiles any updated packages.
- [julia-users] force recompilation of package at ... Michael Borregaard
- [julia-users] force recompilation of packag... Tony Kelman
- Re: [julia-users] force recompilation o... Michael Krabbe Borregaard
