About this compiler

IBM® Open XL C/C++ 1.1 for z/OS® is the newest C/C++ compiler on z/OS that is fully based on the open source LLVM infrastructure. Open XL C/C++ 1.1 supports up to C17/C18 and C++17 language standard features and leverages the features of the IBM z16™™ mainframe.

The Open XL C/C++ 1.1 compiler supports EBCDIC and ASCII execution character sets, and generates AMODE 64 code, making it ideal for z/OS UNIX System Services users porting applications from distributed platforms.

Open XL C/C++ 1.1 is available as a no-charge add-on feature for users who have enabled the z/OS XL C/C++ (an optionally priced feature) on z/OS 2.4 or z/OS 2.5.