Source from sample Makefile: default: qualcosa.sh JOBS=${#J} ./qualcosa.sh Source for sample shell-script: #!/bin/bash echo "According

Source from sample Makefile: default: qualcosa.sh JOBS=${#J} ./qualcosa.sh Source for sample shell-script: #!/bin/bash echo "According to \$JOBS environment variable, the argument of -j/--jobs is $JOBS"