PDF format documentation

Note: To ensure that you can access cross-reference links to other PDF documents, download the PDF files into the same directory on your local machine and do not change the PDF file names.

Table 1. IBM Open XL C/C++ 2.2 for z/OS documentation
Title	Description	Intended audience
What's New	Provides an executive overview of new functions in the IBM® Open XL C/C++ 2.2 for z/OS® compiler, with new functions categorized according to user benefits.	People who are evaluating and planning for IBM Open XL C/C++ 2.2 for z/OS.
Migration Guide	Contains migration considerations for using Open XL C/C++ for z/OS to compile programs that were previously compiled on different platforms, by previous z/OS XL C/C++ and Open XL C/C++ for z/OS releases, or by other compilers.	C and C++ developers who are to use IBM Open XL C/C++ 2.2 for z/OS to compile programs that were previously compiled on different platforms, by previous z/OS XL C/C++ and Open XL C/C++ for z/OS releases, or by other compilers.
Compiler Reference	Contains information about basic compiler usage, various compiler options, pragmas, macros, built-in functions.	Anyone who wants to work with the IBM Open XL C/C++ 2.2 for z/OS compiler. Users new to Open XL C/C++ for z/OS can also find information about the capabilities and features unique to Open XL C/C++ for z/OS. This document can help you understand the compiler features and how to use them for effective software development.

Note: The community version of the Clang documentation from https://clang.llvm.org is being provided as-is and for reference only. It does not constitute support of all features in IBM Open XL C/C++ 2.2 for z/OS. Refer to the Compiler Reference for IBM Open XL C/C++ 2.2 for z/OS for features that are officially supported in the Open XL C/C++ 2.2 for z/OS compiler.

Table 2. Clang 21 documentation
Title	Description	Intended audience
Clang documentation	Contains the release notes for the Clang C/C++/Objective-C/OpenCL front end, part of the LLVM Compiler Infrastructure, release 21.	Anyone who wants to find information about Clang 21.