Specifying compiler options in a configuration file

The default configuration file (/opt/ibmcmp/vac/11.1/etc/vac.cfg.$OSRelease.gcc$gccVersion. For example, /opt/ibmcmp/vac/11.1/etc/vac.cfg.sles11.gcc432 or /opt/ibmcmp/vac/11.1/etc/vac.cfg.rhel5.5.gcc412) defines values and compiler options for the compiler. The compiler refers to this file when compiling C or C++ programs. The configuration file is a plain text file. You can edit this file, or create an additional customized configuration file to support specific compilation requirements. For more information, see Using custom compiler configuration files.