z/OS XL C/C++

Features
System requirements

An advanced optimizing compiler for the z/OS platform.

IBM z/OS XL C/C++ is a compiler that helps you create and maintain applications written in C or C++. This compiler can transform C or C++ source code to make use of your existing IBM System z hardware and the IBM zEnterprise System through built-in functions, performance-tuned libraries, and language constructs. The z/OS XL C/C++ compiler uses the services provided by the z/OS Language Environment and Run-Time Library Extension base elements.

Profile-driven optimization: Provides application profile monitoring and profile directed feedback capabilities to minimize the need for manual tuning.
Middleware support: Supports the latest IBM middleware, including IBM DB2®, CICS®, and IMS™.
Tools: Includes math libraries, optimization utilities, development utilities, and problem determination tools.
Integration: Integrates with IBM Rational Developer for System z and IBM Rational Team Concert for System z.
Standards compliance: Conforms to C and C++ International Standards that enable ease of application migration to System z.

Profile-driven optimization

z/OS XL C/C++ produces monitoring code used to generate a runtime profile to help tune the performance of applications.
Profile directed feedback (PDF) optimization collects information about a program run with typical input data and then applies transformations to the program based on that information. PDF can ensure the performance of the application is optimized for its important inputs.

Tools

z/OS XL C/C++ supports the industry standard DWARF format debugging information.
The z/OS XL C/C++ compilers generate debugging information in both DWARF format and the legacy ISD format for compatibility.
This compiler also supports Debug Tools for z/OS.

Standards compliance

z/OS XL C/C++ conforms to the following programming language specifications: C99, C89, Std C++, and C++98.
This compiler implements additional C++0x features and C/C++ Language extensions.

z/OS XL C/C++ resources

z/OS XL C/C++ library
See the collection of announcement letters and product documentation for z/OS XL C/C++.

Data sheet: z/OS XL C/C++
Learn more about the features and benefits of z/OS XL C/C++.

White paper: Upgrading z/OS XL C/C++ Compilers
New features were introduced in the last few releases of the compiler, and their benefits are outlined in the paper.