Migration Guide

When you migrate your applications from z/OS® XL C/C++ or prior releases of Open XL C/C++ for z/OS to Open XL C/C++ 2.2 for z/OS, there are some migration actions to be considered regarding language standards, binary compatibility, compiler options, pragmas, macros, and so on.

Notes:

z/OS XL C/C++ refers to all z/OS XL C/C++ compilers, including z/OS XL C/C++ 2.4.1, XL C/C++ V2.4, and earlier releases.
For the detailed information about the support for specific compiler options, pragmas, or macros, and so on, in z/OS XL C/C++, see z/OS XL C/C++ documentation library.