On 29 July 2016 at 16:08, Juergen Sauermann wrote: > unfortunately it is not that easy. make does not pass its -j option to > sub-makes.
I don't know if it works as documented, I never checked it, but according to GNU make manual, it should coordinate between sub-makes to run the number of tasks in parallel as requested in top-level make invocation. Passing down -j verbatim doesn't make sense because sub-makes are also spawned in parallel so you would end up running more tasks than requested. Manual also says it shall simply pass -j to sub makes when it's given without a number to mean unlimited number of parallel tasks. https://www.gnu.org/software/make/manual/html_node/Options_002fRecursion.html#index-job-slots_002c-and-recursion -k
