IBM XL C/C++ for Linux details

OpenMP support

Allows you to offload compute-intensive parts of an application and associated data to the NVIDIA GPUs by using the supported OpenMP device constructs.

Exploitation of the latest POWER9 architecture

Provides the architecture and tune compiler options and built-in functions to explore POWER9™.

High performance libraries

Includes the Mathematical Acceleration Subsystem (MASS) and Basic Linear Algebra Subprograms (BLAS) libraries for high-performance mathematical computing.

Profile-directed feedback (PDF)

Tunes the performance of your application for a typical usage scenario; optimizes the application based on an analysis of how often branches are taken and blocks of code are run.

Interprocedural analysis (IPA)

Optimizes across different files (whole-program analysis), and it can result in significant performance improvements.

Language standard compliance

IBM® XL C/C++ for Linux on little endian Linux distributions is C11 and C++11 compliant and supports a subset of the C++14 standard. IBM XL C/C++ for Linux on big endian Linux distributions complies with the ISO C99 & ISO C++03 standards and supports a subset of the C++11 standard.

Diagnostic reports

Provides important information to help you develop and debug your applications more efficiently with the compiler listings, XML reports, and HTML reports.

Symbolic debugger support

Provides debugging information in your compiled objects when you use different levels of the -g compiler option.

Entity visibility attributes

Visibility attributes describe whether and how an entity that is defined in one module can be referenced or used in other modules. Visibility attributes affect entities with external linkage only, and they cannot increase the visibility of other entities. By specifying visibility attributes for entities, you can export only the entities that are necessary to shared libraries.

Vector programming

Provides language extensions to support vector multimedia extension (VMX) and vector scalar extension (VSX) programming.

Customer case study

  • Exceptional performance on IBM Power Systems - Journey of an HPC Researcher

Technical details

Software requirements

  • Ubuntu Server 14.04, 14.10, or 16.04 (for little endian Linux®)
  • SLES 12 or SLES 12 SP3 (for little endian Linux)
  • RHEL 7.3, RHEL 7.4, or RHEL 7.4 for Power Little Endian (POWER9) (for little endian Linux)
  • CentOS 7 (for little endian Linux)
  • RHEL 6.4, 6.5, 6.6, or 7.0 (for big endian Linux)
  • SLES 11 SP2 or SP3 (for big endian Linux)

Hardware requirements

You can use any IBM Power Systems™ server as long as it is supported by your operating system distribution.

  • Approximately 153 MB for product packages
  • Minimum of 2 GB hard drive space for paging
  • Minimum of 512 MB for temporary files
  • 2 GB RAM minimum; 4 GB or more RAM recommended

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