Binding by Copy

The modules specified on the MODULE parameter are always bound by copy. Modules named in a binding directory specified by the BNDDIR parameter are bound by copy if they are needed. A module named in a binding directory is needed in either of the following cases:

• The module provides an export for an unresolved import
• The module provides an export named in the current export block of the binder language source file being used to create a service program

If an export found in the binder language comes from a module object, that module is always bound by copy, regardless of whether it was explicitly provided on the command line or comes from a binding directory. For example,

Module M1:  imports P2
Module M2:  exports P2
Module M3:  exports P3
Binder language S1:  STRPGMEXP PGMLVL(*CURRENT)
                     EXPORT P3
                     ENDPGMEXP
Binding directory BNDDIR1:  M2
                            M3
CRTSRVPGM SRVPGM(MYLIB/SRV1) MODULE(MYLIB/M1) SRCFILE(MYLIB/S1)
          SRCMBR(S1) BNDDIR(MYLIB/BNDDIR1)

Service program SRV1 will have three modules: M1, M2, and M3. M3 is copied because P3 is in the current export block.