Do I need to build B2/bjam with options to run with all cores?

The Quickbook documentation build  of Boost.Math is on my critical path of the ‘edit-compile-run-crash’ cycle 😉

When the docs build, it only ever uses one core, leaving 15 of my shiny new cores idle ☹

I have tried adding -j15 (even though I understand that this is now the default).

Do I need to compile b2 in some multiprocessor way to get all cores working and hopeful cut the build time?

(In contrast, if I build all the math examples or tests etc, I get all the cores working at 100%).

Or am I expecting the impossible?

Thanks

Paul

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