Description of Problem:

A recent check-in of the USBS testing code depended on functionality added to
libcdl nine months ago, but there were still tools being used in the testfarm
predating those changes. The result was confusing error messages of the form:
 c:/TestFarm/tmp/current_20020124_0830/ecos-current/packages/io/usb/slave/current/cdl/usbs.cdl, option CYGBLD_IO_USB_SLAVE_USBTEST, property requires: error
    Unexpected character ',' in expression.
    {...B_SLAVE_TESTS}  ^,^ { " tests/usbtarget") 

Instead the CDL script should have been able to require a version of libcdl
which contained the appropriate functionality, so that a more informative error
message could be generated.

Version-Release number of selected component (if applicable):CVS

How Reproducible:Every time

Steps to Reproduce:
1. write a CDL script that uses functionality such as the is_substr() function
2. run this with old host-side tools which do not have this functionality
3. be confused by the resulting error messages

Actual Results:


Expected Results:


Additional Information: