Failed to build yocto/WP76xx Firmware Release 10.1

We tried with similar enviornment as mentioned “export NUM_THREADS=1 BB_NUMBER_THREADS=1 PARALLEL_MAKE=–jobs=1”.
It can able to compile.May i know requirement of setting up this enviornment.
for your info We are using ubuntu 16.04.please check in ubuntu 16 if using other than ubuntu 16.