Update installation

A program temporary fix (PTF) is an update to XL C that provides a fix or multiple fixes to the product.

You can download the latest compiler updates from the support website: http://www.ibm.com/support/entry/portal/product/rational/xl_c_for_aix . You can also find the instructions on Fix Central.

Tasks for update installation
If you are installing an update to XL C, you must first determine whether the compiler has been installed to a default or nondefault directory, and then follow the recommended steps for updating that installation type.
Preparing a PTF package for installation
Updates to the compiler are supplied as PTF packages. Before you use these PTF packages to update the compiler, you must download and decompress these packages, and then generate a .toc file.
Updating a basic installation
If you used a basic installation process to install XL C to a default location, it is recommended that you use SMIT or the installp command to install PTFs.
Updating an advanced installation using xlcndi
If the XL C compiler has been installed to a nondefault directory, you must use xlcndi to install PTFs.
Product version migration
If you have a previous version of the compiler, it will not be removed when you are installing this version; only the C++ runtime library and the SMP runtime library will be migrated to the new versions. You can maintain multiple versions of the compiler on your system.
Operating system migration
If you have the compiler installed on AIX® 7.1, you might want to migrate the operating system to AIX 7.2.