Configuring IBM XL C/C++ for Linux, V11.1 (for advanced users)

Before you can run IBM® XL C/C++ for Linux®, V11.1 you must configure (or re-configure) the compiler if either of the following conditions apply:
Two configuration tools are provided with the compiler: new_install and vac_configure, both located in the installation_path/vacpp/11.1/bin/ directory after installation.
Note: installation_path is the installation location of the compiler packages. If the compiler is installed in the default location, installation_path is /opt/ibmcmp/.
It is recommended that you use the new_install utility to configure the compiler, provided that all of the following conditions are met:

You should invoke the vac_configure utility directly only when at least one of the following is true:

Note: If you configure the compiler using vac_configure, your output configuration file, vac.cfg, can be written to any location where you have write permission. You would not need root or administrative privileges.