A highly configurable compiler
You can use a variety of compiler invocation commands and options to tailor the compiler to your unique compilation requirements.
Compiler invocation commands
XL Fortran provides several commands to invoke the compiler, for example, xlf, xlf90, xlf95, xlf2003, and xlf2008. Compiler invocation commands are provided to support most standardized Fortran language levels and many popular language extensions.
The compiler also provides corresponding "_r" versions of most invocation commands, for example, xlf_r. The "_r" invocations instruct the compiler to link and bind object files to threadsafe components and libraries, and produce threadsafe object code for compiler-created data and procedures.
For more information about XL Fortran compiler invocation commands, see Compiling XL Fortran programs.
Compiler options
- Debugging your applications
- Optimizing and tuning application performance
- Selecting language levels and extensions for compatibility with nonstandard features and behaviors that are supported by other Fortran compilers
- Performing many other common tasks that would otherwise require changing the source code
You can specify compiler options through a combination of environment variables, compiler configuration files, command line options, and compiler directive statements embedded in your program source.
For more information about XL Fortran compiler options, see Summary of compiler options.
Custom compiler configuration files
The installation process creates a default plain text compiler configuration file containing stanzas that define compiler option default settings.
If you frequently specify compiler option settings other than the default settings of XL Fortran, you can use makefiles to define your settings. Alternatively, you can create custom configuration files to define your own frequently used option settings.
For more information about using custom compiler configuration files, see Using custom compiler configuration files.
Utilization tracking configuration file
The utilization and reporting tool can be used to detect whether your organization's use of the compiler exceeds your license entitlements.
The utilization tracking and reporting feature of the compiler has its own configuration file. The main compiler configuration file contains an entry that points to this file. The different installations of the compiler product can use a single utilization tracking configuration file to centrally manage the utilization tracking and reporting feature.
For detailed information about the utilization tracking and reporting feature, see Tracking and reporting compiler usage in the XL Fortran Compiler Reference.
