Using DD statements for the standard loader data sets

The loader always requires one standard data set, defined by the SYSLIN DD statement. Three other standard data sets are optional, and, if you use them, you must define them in DD statements with the names SYSLOUT, SYSPRINT, and SYSLIB. The four data set names and characteristics are shown in Table 1.

Table 1. Standard loader data sets
ddname	Type	Function
SYSLIN	Input	Primary input data (normally the compiler output)
SYSLOUT	Output	Loader messages and module map listing
SYSPRINT	Output	Runtime messages and problem output listing
SYSLIB	Library	Automatic call library

Figure 1 is an example of the general job control procedure for creating and running an executable program under batch.

Figure 1. JCL for creating an executable program

//STEP1    EXEC PGM=LOADER,PARM='MAP,LET'
//STEPLIB  DD DSN=CEE.SCEERUN,DISP=SHR
//         DD DSN=CEE.SCEERUN2,DISP=SHR
//SYSLIB   DD DSN=CEE.SCEELKED,DISP=SHR
//         DD DSN=USER.LOADLIB,DISP=SHR
//SYSLIN   DD DSN=USER.OBJLIB(PROGRAM1),DISP=SHR
//SYSLOUT  DD SYSOUT=A
//SYSPRINT DD SYSOUT=A
⋮
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