AOSP source code build error: Virtual memory exhausted: Cannot allocate memory

Sometimes compiling certain things from source I've received a "virtual memory exhausted: Cannot allocate memory" error. The following is a quick tip to maybe allow gcc/libtool/make/whatever to finish their duty.

Change the user’s limits.

ulimit -n

and it is current showing as 1024.
Increase limit from 1024 to 4084.

ulimit -n 2048