Documentation is incomplete or missing. That includes this document.
Some programs are missing, that is, some programs are present in the
sccs suite and absent from this one.
On platforms where the C++ compiler used to compile CSSC does not
support exceptions, the normal mechanism for recovering from an error
in the processing of an SCCS file is unavailable. This means that if
such an error occurs, the program will immediately make a fatal exit,
as opposed to carrying on with the next file. In order to fix this
problem, please either CSSC with a compiler which has working support
for exceptions, or process just one file at a time.
Some programs behave subtly differently to their original counterparts.
Error messages are different, and also extra warnings are provided in
some circumstances. All other differences are also bugs. Please report
them (see Reporting Bugs).
Known bugs are listed on the bug tracking system at
http://savannah.gnu.org/bugs/?group=cssc. Some historical known
issues are listed in the file docs/BUGS. Once this file has
become obsolete it will be removed from the distribution.
If an item on the TODO list (see the file docs/TODO) has in
fact been fixed, this is a bug in the TODO list. Please report this via
the bug tracking system.
Some programs are partially implemented. Not all programs support all
the command-line options of their original counterparts. Also, some
features are currently missing. If you would like support for some
feature that is missing, please request it in the same way you would
report a bug; I'd like to know which features are required first.