Warnings

Only warning messages from the C++ compiler front-end that display a tag when the -errtags option is used can be specified with the -errwarn option to cause the compiler to exit with a failure status.

The warning messages generated by the C++ compiler change from release to release as the compiler error checking improves and features are added. Code that compiles using -errwarn=%all without error may not compile without error in the next release of the compiler.