The J2SE Makefiles assume that if you are building windows bits,
then USERNAME is defined. But that is not necessarily true in
a Cygwin environment. Either USER or LOGNAME or USERNAME or
id -un are plausible ways of getting the current user name.

As a result, a Cygwin `make sanity' gives:

Target Build Versions:
   JDK_VERSION = 1.6.0
   MILESTONE = internal
   BUILD_NUMBER = _07_mar_2005_10_28

It should say something like:

   BUILD_NUMBER = martin_07_mar_2005_10_28

###@###.### 2005-03-07 18:32:36 GMT