IBM Support

XL C/C++ Runtime for Linux on z Systems 1.2



This page contains the Runtime Environment package for use with applications developed using the IBM XL C/C++ for Linux of z Systems 1.2 compiler or its predecessors.

Download Description

If you wish to run an application developed using the IBM XL C/C++ for Linux on z Systems 1.2 compiler, but do not have the corresponding version of compiler or runtime already installed, then you need to install the Runtime environment package.

Table of Contents
Sections Description

The Change history section provides an overview on what is new in this release with a description of any new functions or enhancements when applicable.

The How critical is this fix section provides information related to the impact of this release to allow you to assess how your environment may be affected.

The Prerequisites section provides important information to review prior to the installation of this release.

The Download package section provides the direct link to obtain the download package for installation in your environment.

The Installation instructions section provides the installation instructions necessary to apply this release into your environment.

The Known side effects section contains a link to the known problems (open defects) identified at the time of this release.

Supporting Documentation
Document Description

Click to review the detailed system requirements information for a complete list of hardware requirements, supported operating systems, prerequisites and optional supported software, with component-level details and operating system restrictions.

IBM Knowledge Center provides an entry point to product documentation. You can view, browse, and search online information related to the product.

You can also visit the XL C++ for Linux on z Systems library to review additional documentation.

Click to review a list of technotes describing technical issues, changes to the existing behavior, as well as documentation corrections for this product.

Click to review a complete list of the defects (APARs) resolved in this release including a list of resolved defects for the entire version family.

XL C/C++ Developer forums and blog.


Prerequisites include:

Operating system:

    IBM z Systems servers that support the following:
  • Red Hat Enterprise Linux for IBM System z 6.3 (RHEL 6.3)
  • Red Hat Enterprise Linux for IBM System z 7.0 (RHEL 7.0)
  • Red Hat Enterprise Linux for IBM System z 7.1 (RHEL 7.1)
  • Red Hat Enterprise Linux for IBM System z 7.2 (RHEL 7.2)
  • SUSE Linux Enterprise Server for System z 11 Service Pack 3 (SLES 11 SP3)
  • SUSE Linux Enterprise Server for System z 12 (SLES 12)
  • SUSE Linux Enterprise Server for System z 12 Service Pack 1 (SLES 12 SP1)


  • The compiler, its libraries, and its generated object programs run on IBM z Systems, models z13, zBC12, zEC12, z114, z196, z10™ BC, or z10 EC with the required software and disk space.

Required hard disk space:

  • 0.5 MB

Installation Instructions

Review the installation instructions.

Terms and Conditions: By downloading, installing, copying, accessing or using this software you agree to the terms and conditions outlined in the License Agreement. Please review the License Agreement and License Information documents prior to proceeding with download or installation.

Installation instructions

To install the Runtime environment, complete the following steps:

  1. Download, and extract the packages. For example:

    tar -zxvf <filename>.tar.gz

  2. Install the packages using the following command:


Uninstallation Instructions

To uninstall the Runtime environment, run the following command:

     rpm -e libxlc-x.x.x.x-YYMMDD

, where x.x.x.x or x.x.x-x.x.x.x refers to the version number, and YYMMDD represents the build date of the rpms. In cases where a package is required by other installed packages, that package might not uninstall.

Download Package

The Runtime package IBM_XL_C_CPP_V1.2.0.0_LINUX_390_RUNTIME.tar.gz contains the following files:
Installation locations of

How critical is this fix?

Impact Assessment
Impact Description

This is a General Availability (GA) release.

Test Results


Regression: An error in the Maintenance Delivery Vehicle (MDV) that produces incorrect or unexpected behavior causing a supported feature to stop functioning as designed.
This includes:

  • Coding errors that cause a regression
  • Documentation or packaging problems that cause a regression
  • Errors reported in a new function delivered in a MDV that cause a regression

Incomplete: An error in the MDV has not regressed, but does not work as designed.
This includes:

  • Fixed APARs which did not solve the original problem but did not break anything new
  • APARs reporting documentation errors, such as readme errors, that cause problems applying an MDV but do not lead to a regression

  • Regression and incomplete APARs are considered fix-in-error or MDV-in-error
  • Definitions above apply only to valid APARs that result in product fixes (APARs returned as working-as-designed are not assessed for being fix-in-error)
  • Issues in major releases due to new functionality do not apply in this definition

There are no known regressions to report.

Problems Solved

Defects resolved

Click the Fix List link in the table of contents above to review a list of the problems solved in this release.

Known Side Effects

Review the following list of known issues and open defects:

There are no known issues report.

Open defects

Review the following list of open defects for XL C/C++ for Linux on z Systems on the IBM Support Portal.

Review technote 1461170: Open APARs for IBM products available on the Web for information on how to configure your MyNotifications subscription account and subscribe to the APARs you are interested in following.

Change History

What's new

For information about the new features and enhancements, review the Announcement Letter.

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Technical Support

The IBM XL C/C++ for Linux on z Systems Runtime environment is not supported as a stand-alone software product.

If you suspect a problem with the IBM XL C/C++ Runtime environment component while using it with a third-party application, contact your application provider for support.

Full support (installation, defect support and general questions) for the IBM XL C/C++ Runtime environment component is available with the software subscription and support agreement for the XL C/C++ for Linux on z Systems product.

A suitable test case is required for defect support; review technote 1260804: Test case preparation for IBM XL compilers support for details.

Depending on your application, you may also need to install the XL C/C++ Addons for Linux on z Systems 1.2 package. The Addons package contains files that may be required by some third-party applications. Only download and install the Addons package if instructed by your application provider.

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Document Information

Modified date:
08 August 2018