White papers Code optimization with the IBM z/OS XL C/C++ Compiler This document introduces the capabilities that you can use to maximize the performance of your C/C++ applications. Read the white paper Upgrading z/OS XL C/C++ compilers New features that are introduced in recent releases of the XL C/C++ compiler and their benefits are outlined in this paper. Read the white paper SOS info utility for z/OS XL C/C++ compiler The SOS info utility can be used to obtain options information from an executable file without the need to produce and maintain listing files. Read the white paper Articles IBM C/C++ and Fortran new beta compilers available for download Learn about combining IBM's strength in compiler optimization technology with the LLVM open source infrastructure. Read the article Using inline assembly for z/OS XL C/C++ compiler Two ways to use high-level languages in low-level programming. Read the article AutoSIMD compiler optimization for z/OS XL C/C++ programs Learn about the AutoSIMD optimization introduced in the z/OS 2.2 XL C/C++ compiler. Read the article Videos Get an overview of the IBM z/OS XL C/C++ compiler This video introduces IBM z/OS XL C/C++, an advanced optimizing C and C++ compiler on z/OS to exploit the latest IBM Z architecture. Watch the video (03:02) Learn about the Metal C feature in the IBM z/OS XL C/C++ compiler This video introduces the Metal C feature in the IBM z/OS XL C/C++ compiler. Watch the video (02:47) Other resources z/OS XL C/C++ documentation library This library contains a collection of announcement letters and product documentation for z/OS XL C/C++. Go to the library Fix list for z/OS XL C/C++ A complete listing of releases, refreshes, fix packs and interim fixes sorted by version for IBM z/OS XL C/C++. Check the fix list Hardware and Software support for IBM Z, IBM Power and Storage Focus on keeping IBM Z infrastructure operational Proactive Support for IBM Z can help you get personalized support with priority response handling through a dedicated IBM Z Technical Account Manager (zTAM). Get Proactive Support for IBM Z (PDF, 724 KB) Upgrade warranty and maintenance for IBM Z Maintain the highest level of availability with best in-class IT support to keep your mission-critical systems running smoothly. Buy or upgrade now IDC MarketScape names IBM as a Leader in Support Services Based on the IDC study, 85% of enterprises mentioned support services as a key differentiator when choosing a vendor to purchase datacenter systems. Download the IDC report Expert resources to help you succeed Support Find solutions by using support search or open a support case. Documentation Get information about how to maintain and use the product. Community A rich community of business and technical expert blogs and forums.