Add a check to the make system to bail if the make version is < 3.80
tree1968ed95ebab5a345a9989e58e0447ab85b97aeb
-rw-r--r-- 1479 LICENSE
drwxr-xr-x - apps
drwxr-xr-x - boot
-rwxr-xr-x 71 bootdc
-rwxr-xr-x 152 buildloop
drwxr-xr-x - config
-rw-r--r-- 2363 docs.html
drwxr-xr-x - docs
drwxr-xr-x - include
drwxr-xr-x - kernel
drwxr-xr-x - lib
-rw-r--r-- 468 macros.mk
-rw-r--r-- 4715 make.syscfg
-rw-r--r-- 1442 makefile
-rw-r--r-- 872 newos_build_times.txt
drwxr-xr-x - scripts
drwxr-xr-x - templates
-rw-r--r-- 1483 todo.txt
drwxr-xr-x - tools