Previous releases of the IBM C/C++ compiler on z/OS, AIX, and OS/400 included support for the IBM Open Class (IOC) Library. This support has been removed from the compiler or will be removed from the compiler.
The UNIX System Laboratories (USL) I/O Stream Library and Complex Mathematics Library are still supported on z/OS, AIX, and OS/400. Although support for these classes is not being removed at this time, it is recommended that you migrate to the Standard C++ iostream and complex classes. This is especially important if you are migrating other IOC streaming classes to Standard C++ Library streaming classes, because combining USL and Standard C++ Library streams in one application is not recommended.
This manual provides information about the USL I/O Stream Library and the Complex Mathematics Library. For information about how to migrate away from these classes, see the IBM Open Class Library Transition Guide.
The following symbols indicate information that is specific to AIX, OS/400, or z/OS:
