Running the xlf_install utility for a new installation

The xlf_install utility is the recommended tool for installing XL Fortran. It is located in the root directory of the installation image.

About this task

Note: Because the xlf_install utility is written in Perl, you must ensure that Perl is installed on your system before you run the utility. See Verifying that the required GNU and Perl packages are installed.

When you run the xlf_install utility for a new installation, it performs the following tasks:

Checks for all prerequisite software packages
Uninstalls any previously installed XL Fortran runtime package and SMP runtime package
Installs all compiler packages into the default location, /opt/ibm/, except for the Fortran runtime package and SMP runtime package, which are installed into the /opt/ibmcmp/ directory
Automatically invokes the new_install utility, which installs the license file and generates the default configuration file
Optionally creates symbolic links in /usr/bin/ to the compiler invocation commands
Generates an installation log in the /tmp/ directory

To run the xlf_install utility to install IBM XL Fortran for Linux, V15.1:

If the product CD is mounted at the /cdrom directory in the system, issue the following commands:
```
   cd /cdrom
   ./xlf_install    
```
For additional arguments that you can specify for xlf_install, see xlf_install options.
- If another instance of IBM XL Fortran for Linux is detected on your system in the same installation directory, you are prompted to uninstall the Fortran runtime package and SMP runtime package. Confirm that you want to proceed with the uninstallation. If you choose not to uninstall the existing Fortran runtime package and SMP runtime package, the installation process will end.
- If other versions of the IBM SMP and MASS packages are detected on your system either alone or as part of an installation of IBM XL C/C++ for Linux, V13.1, you are prompted to uninstall them. Confirm that you want to proceed with uninstalling the existing IBM SMP and MASS packages. If you choose not to uninstall the previously installed components, the installation process will end.
  Note: xlf_install uninstalls these packages from their existing location and reinstalls them to the default location, /opt/ibmcmp/. Therefore, if they were previously installed in a nondefault location as part of an IBM XL C/C++ installation, you must run xlc_configure to reconfigure the IBM XL C/C++ compiler to point to the default location for these packages. For procedures, see "Running the xlc_configure utility directly" in the IBM XL C/C++ for Linux, V13.1 Installation Guide.
You are presented with the license agreement and licensing information. Read the license agreement and licensing information. If you agree to the licensing terms, accept the license agreement to continue installation.
You are prompted to create symbolic links for the compiler invocations in the /usr/bin/ directory.
Optionally, create the symbolic links.
Note: An alternative to this step is to add the path that contains the compiler invocations to the PATH environment variable. See Setting the PATH environment variable to include the path to the compiler invocations.

If you chose to create symbolic links, the following links are created in the /usr/bin/ subdirectory:
- xlf
- xlf90
- xlf95
- xlf2003
- xlf2008
- xlf_r
- xlf90_r
- xlf95_r
- xlf2003_r
- xlf2008_r
For more information on other specialized invocations that may be available, please refer to IBM XL Fortran for Linux, V15.1 Compiler Reference, "Invoking the compiler".
Note: Some command links are not created in /usr/bin/, either because they might delete user-defined or GCC-related invocations, or because they are not compiler invocation commands. These include:
- f77, f90, f95, fort77, f2003, f2008
- cleanpdf, mergepdf, new_install, resetpdf, showpdf, xlf_configure

If all packages are successfully installed:

The xlf_install Perl script returns 0 and the following messages are displayed confirming the successful installation:

"IBM XL Fortran for Linux, V15.1" Version 15.1.0.0 has been 
successfully installed and configured under prefix "/opt/ibm".
"IBM XL Fortran for Linux, V15.1" Version 15.1.0.0 has been 
successfully installed.

Note: NLS is not supported for messages that are issued by the xlf_install utility.

The configuration file is generated. Its location is /opt/ibm/xlf/15.1.0/etc/xlf.cfg.$OSRelease.gcc$gccVersion. For example, /opt/ibm/xlf/15.1.0/etc/xlf.cfg.sles11.gcc432 or /opt/ibm/xlf/15.1.0/etc/xlf.cfg.rhel6.2.gcc446.
The installation log is moved to its permanent location: xlf/15.1.0/xlf_install.log.

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