Runtime migration issues with OS/390 C/C++ applications

This information helps application programmers understand and resolve the compatibility issues that might occur when they relink programs from an OS/390® C/C++ compiler to z/OS® V2R3 XL C/C++.

When you run applications that were previously compiled with an OS/390 compiler and library, be aware of the following potential migration issues:

Retention of OS/390 runtime behavior
Debug format and translation of the c89 -g flag option
Language Environment customization issues