XL C/C++ for Linux

Advanced optimizing compiler for selected Linux distributions

IBM XL C/C++ for Linux is an industry standards-based, programming tool that you can use to develop large, complex, computationally intensive, 32- and 64-bit applications in the C and C++ programming languages. Optimized for IBM Power Systems, including the POWER7 processors, XL C/C++ for Linux supports vector and parallel programming. This compiler complies with the latest international programming language standards providing support for code portability between multiple operating systems and hardware platforms.

  • Performance tuning: Optimizes and maximizes the application performance executing on Power Systems.
  • Math libraries and utilities: Provides highly-tuned math libraries and optimization and development utilities.
  • Standards compliance: Conforms to C++ International Standards enabling ease of application migration to Power Systems.
  • Integration: Integrates with IBM Rational® Developer for Power and IBM Rational Team Concert™ for Power.
  • Reporting: Generates reports that indicate the number of concurrent users using the compiler.

Performance tuning

  • XL C/C++ for Linux offers automatic parallelization of sequential programs to make use of modern multicore processors. This compiler provides a complete implementation of OpenMP 3.0 to hide the complexities of parallel programming.
  • XL C/C++ provides language extensions to support Vector Multimedia eXtension (VMX) and Vector Scalar eXtension (VSX) programming.
  • XL C/C++ for Linux 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.

Math libraries and utilities

  • Mathematical Acceleration Subsystem (MASS) consists of libraries of mathematical intrinsic functions tuned specifically for optimum performance on Power Architecture.
  • Basic Linear Algebra Subprograms (BLAS) provides high-performance, algebraic functions used to perform combined matrix multiplication and addition on general matrices or their transposes.
  • Shared memory parallelization (SMP) runtime library supports both explicit and automatic parallel processing.

Standards compliance

  • XL C/C++ for Linux conforms to the following programming language specifications: C99, C89, Standard C++ (2003), and C++ 98.
  • This compiler implements additional C++0x features.

XL C/C++ for Linux resources

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Advanced optimizing compiler for selected Linux distributions

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XL C/C++ for Linux, V12.1


Operating SystemSoftwareHardware
Linux - Red Hat Enterprise Linux 6.2 (RHEL 6.2)
- Red Hat Enterprise Linux 5.7 (RHEL 5.7)
- SUSE Linux Enterprise Server 11 Service Pack 2 (SLES 11 SP2)
- SUSE Linux Enterprise Server 10 Service Pack 4 (SLES 10 SP4)

Instance of GNU Compiler Collection (GCC) and Perl

Refer to XL C/C++ for Linux Installation Guide for required packages.		 IBM Power Systems servers supported by SLES 10 SP4, SLES 11 SP2, RHEL 5.7, and RHEL 6.2

200 MB disk space

XL C/C++ for Linux, V11.1


Operating SystemSoftwareHardware
Supported operating systems

- Red Hat Enterprise Linux 6.0 (RHEL 6.0)
- Red Hat Enterprise Linux 5.5 (RHEL 5.5)
- SUSE Linux Enterprise Server 11 Service Pack 1 (SLES 11 SP1)
- SUSE Linux Enterprise Server 10 Service Pack 2 (SLES 10 SP2)		 - Instance of GNU Compiler Collection (GCC)
- Refer to XL C/C++ for Linux Installation Guide for required packages.
- Perl 5.0 or later, to run the installation utility		 IBM Power Systems servers supported by:

- Red Hat Enterprise Linux 6.0 (RHEL 6.0)
- Red Hat Enterprise Linux 5.5 (RHEL 5.5)
- SUSE Linux Enterprise Server 11 Service Pack 1 (SLES 11 SP1)
- SUSE Linux Enterprise Server 10 Service Pack 2 (SLES 10 SP2)

Required hard disk space: 200 MB

All versions


Operating SystemSoftwareHardware
All versions Frames-capable browser to view HTML-based online documentation

Graphical desktop environment (such as K Desktop Environment (KDE) or GNOME) that supports web browsers and PDF viewers

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XL C/C++ for Linux

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