Before installing XL C

Before you install IBM® XL C for AIX®, V11.1:

Familiarize yourself with the installation image, which contains the installable compiler filesets.
Ensure that system prerequisites such as disk space and operating system are met.
Determine the tasks you need to perform, depending on your installation requirements.
Become either the root user or a user with administrator privileges.
If you are using the evaluation copy of the XL C compiler, you can follow these steps to upgrade it to a full product version:
1. You must uninstall the evaluation copy first by following the steps in Uninstalling XL C.
2. Install the full product version of the XL C compiler by following the steps in Basic installation or Advanced installation.