[Freeswitch-users] What is the digit for in ./bootstrap.sh -j4 ?

On the Installation Guide page of the FreeSwitch wiki, it says the following: ------------------------- You can use multiple cores for your bootstrap/config/build, by specifying it at the start, e.g.: (note this may make build errors harder to spot) ./bootstrap.sh -j4 -------------------------- I looked through the bootstrap.sh code, and it appears that the trailing digit in the above example is ignored? Or am I missing something? I was thinking/hoping it was a way to specify the maximum # of background processes that get created. At this point I assume it is just an error in the wiki.