XL C/C++ for z/VM

An advanced optimizing compiler for the z/VM platform

IBM XL C/C++ for z/VM is a standards-based programming tool for developing large, complex, computationally-intensive applications. XL C/C++ for z/VM lets you write C and C++ applications or extend existing C applications using C++.

  • Standards compliance: Conforms to the ISO/IEC 9899:1999 international standard (C99), the latest ANSI/ISO 1998 C++ standard, and a standards-conforming C compiler and includes the C++ Standard Library.
  • HOT support: Uses the high order transformation (HOT) option for high-order transformations, which are optimizations that improve performance for loops through techniques such as interchange, fusion, and unrolling.
  • OPTIMIZE(3) support: Supports OPTIMIZE(3) or OPT(3), the compiler's highest and most aggressive level of optimization.
  • LANGLVL compiler option: Supports all available language levels that you can use to compile your code within XL C/C++ for z/VM.
  • Portability: Supports industry standards to simplify the porting of applications to z/VM from both IBM and non-IBM platforms.

Standards compliance

  • The C++ Standard Library includes the following: the C++ Standard I/O Stream Library for performing input and output (I/O) operations; the C++ Standard Complex Mathematics Library for manipulating complex numbers; and the STL, which is composed of C++ template-based algorithms, container classes, iterators, localization object, and the string class.
  • XL C/C++ for z/VM includes the UNIX System Laboratories I/O Stream and Complex Mathematics libraries.

OPTIMIZE(3) support

  • OPT(3) introduces additional options and pragmas to help you improve your application performance, including the loop unrolling option and pragmas and a number of new built-in functions.
  • Using the OPT(0), OPT(2) and OPT(3) options, you can obtain optimization levels that run from comprehensive low-level optimizations to more extensive optimizations.

XL C/C++ for z/VM resources

  • White paper: XL C/C++ (US)

    Questo white paper offre una panoramica dei compilatori XL C/C++ e delle funzioni che consentono di rispondere alle esigenze di sviluppo C e C++.

Buy XL C/C++ for z/VM

An advanced optimizing compiler for the z/VM platform

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System requirements

Mandatory and optional software requirements may vary according to your level of the operating system. See the Software Announcement for details.


Operating SystemSoftwareHardware
z/VM z/VM V6.2 or later Any zSeries server supported by zVM V6.2, or later.

The C/C++ for z/VM compiler will only execute on z/VM V6.2, or later and can only be licensed to operate on standard processor engines.

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XL C/C++ for z/VM

IBM Software