+(0) GNU make
+
+It used to be required to have a "reasonable make", meaning GNU make,
+BSD make, or perhaps Solaris make. It is now required to use GNU
+make. Version 3.81 should certainly work; the intent is not to
+require the bleeding edge.
+
+Note that the examples below are written with "make". They probably
+should say "gmake", as GNU make is installed as gmake when it is not
+the native make.
+