Steps for rebinding a changed compile unit under z/OS® batch

Before you begin: Make a change to a single source file and rebuild the application.

Perform the following steps to recompile the single changed source file and make a replacement of its binder sections in the program:

1. Recompile the single changed source file. Use the CSECT compiler option so that each section is named for purposes of rebindability. For example, assume that you have made a change to USERID.PLAN9.C(UNIT1). Recompile the source file using the EDCC procedure as follows:

   //* Compile UNIT1 user
   //CC EXEC EDCC,
   //             CPARM='OPTF(DD:OPTIONS)',
   //             INFILE='USERID.PLAN9.C(UNIT1)',
   //             OUTFILE='USERID.PLAN9.OBJ(UNIT1),DISP=SHR'
   //COMPILE.OPTIONS DD *
      LIST RENT LONGNAME DLL CSECT(MYPROG)
   /*

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2. Rebind only the changed compile unit into the executable program, which replaces its corresponding binder sections in the program object:

   //BIND   EXEC CBCB,
   //       OUTFILE='USERID.PLAN9.LOADE,DISP=SHR'
   //OLDPGM  DD DSN=USERID.PLAN9.LOADE,DISP=SHR
   //NEWOBJ  DD DSN=USERID.PLAN9.OBJ,DISP=SHR
   //SYSIN DD *
      INCLUDE NEWOBJ(UNIT1)
      INCLUDE OLDPGM(MYPROG)
      NAME NEWPGM(R)
   /*

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