The `-j` is meant for the top-level invocation only, and the $(MAKE) pattern is standard.
The `+` or $(MAKE) "tricks" to ensure the jobserver is inherited in submake and any other subprocess are no longer needed in gmake 4.4 (from 2022) because it defaults to a FIFO instead of pipes. The author should just upgrade gmake :).
The `+` or $(MAKE) "tricks" to ensure the jobserver is inherited in submake and any other subprocess are no longer needed in gmake 4.4 (from 2022) because it defaults to a FIFO instead of pipes. The author should just upgrade gmake :).