Makefile: add some helpful rules for non-GNU makers
commit1fc5ef0fc9c2794f51fbeb9d9d7226c4cb951cd8
authorKyle J. McKay <mackyle@gmail.com>
Mon, 3 Nov 2014 22:03:02 +0000 (3 14:03 -0800)
committerKyle J. McKay <mackyle@gmail.com>
Mon, 3 Nov 2014 22:03:02 +0000 (3 14:03 -0800)
tree3a20109c1229b6d47b3d06072d9b94f05d6b278a
parent6cb9b4e9460688b9fb91b8b3e4d1bab555b6fa91
Makefile: add some helpful rules for non-GNU makers

Add a comment and helpful rules that cause most non-GNU
make commands to bail out early with a helpful error.

If running with GNU make the helpful additions do nothing.

Signed-off-by: Kyle J. McKay <mackyle@gmail.com>
Makefile