CXX
   The CXX command invokes the C++ compiler to compile C++ source
   programs. The syntax is as follows:
        CXX file-spec,...  +library-file-spec/LIBRARY...
   Qualifiers indicate special actions to be performed by the
   compiler or special input file properties. Compiler qualifiers
   can apply to either the CXX command or to the specification
   of the file being compiled. When a qualifier follows the CXX
   command, it applies to all the files listed. When a qualifier
   follows the file specification, it applies only to the file
   immediately preceding it.
   For help on the C++ Class Library, type
      $ HELP CXXL
   For help on the Standard Library, type
      $ HELP CXXLSTD
   An HTML version of this online help is accessible from:
      file:/sys$common/syshlp/cxx$help/cphelp.html