Assembling source

When a SYSMOD contains source to be assembled, it can supply either just the source (++SRC/++SRCUPD) for that element, or it can supply both the source (++SRC/++SRCUPD) for the element and an object deck (++MOD) for the same element.

Source only: When the SYSMOD supplies only the source and no corresponding object deck, the element is assembled.
Source and ++MOD: When the SYSMOD supplies both the source and the corresponding object deck, SMP/E determines whether the object deck can simply be link-edited into the target system or whether the source must be assembled. It does so by considering the following questions:
- Was ASSEM specified on the APPLY command?
- Are there any updates to the source that the SYSMOD supplying the object does not know about (UMIDs in the target zone SRC entry)?
- Has another SYSMOD, which this SYSMOD does not know about, assembled the module (RMID of the target zone MOD entry for the module to be assembled)?
- Is the ASSEMBLE indicator set for the corresponding MOD?
If the answer to any of these questions is yes, the module is assembled if SMP/E can determine where the resultant assembled object should go. SMP/E knows where to put the assembled object if there is a target zone MOD entry for the resultant object and a load module into which the module should be link-edited. If the MOD entry cannot be found or is not included in the same SYSMOD, a warning message is issued. Processing of the SYSMOD continues without assembling or link-editing the module. For further information on how SMP/E processes the object deck after assembly, see Module replacements.