A complex library, such as KERNLIB or PACKLIB, may be built in one go, as shown above, or component by component. The former is useful when one wishes to install a new release of CERNLIB, or install CERNLIB from scratch. The latter is more appropriate if only one or a few packages have changed.
For example, if a routine in ZEBRA has been modified, we may rebuild PACKLIB using the following steps:
The first command will cause the ZEBRA source code to be extracted, split and compiled. The second will rebuild PACKLIB from all of the appropriate object files.