When building the J2SE workspace using Cygwin (which appears to be a supported
configuration for SCSL and source licensees judging from the build
documentation), there is a failure in make/java/nio related to the script
genExceptions.sh. The symptom is that all of the generated Java source files it
creates are zero-length.

The bug only occurs if the original "make" is invoked in the parent directory or
higher (i.e., make/java or make). If make is invoked from the make/java/nio
directory, the classes are generated successfully.

The bug appears to be related to the use of "cat" and the redirection of
standard input to output the exception classes' text. Redirecting the output of
"echo" to the target file works. Catting a file containing some flat text into
the target file also works.

So far the failure has not been boiled down to a small test case. A two
directory-deep recursive make setup was created that generated a trivial file
in the bottommost make invocation using cat; this test succeeded.

As a workaround and/or solution, the same spp.sh script used to generate the
NIO Buffer classes' sources could be used to generate the exception classes.