Hi, I know this question looks a little silly.....but recently I found myself a little bewildered on this issue.And because it's about the basics,so I raise it here.
I'm using Enterprise Cobol for Z/os and to make things simple,I'll concentrate on batch Cobol program(no cics,no db2.....). Program B is a subprogram. Program A is calling prgram B: Call 'name-of-program-b'. And I set complier option to 'NODYN',so I'm sure this is a static call. Off course,becasue it's a static call,program A and program B must be linked into a single load module. First I use IBM-supplied procedure IGYWCL to complie-and-link program B to a load module and place it in a library named 'johnny.cob.subpgm.load'. Then I do the same thing to program A.Becuase it statically calls program B, I added 'johnny.cob.subpgm.load' to ddname 'SYSLIB' of step 'LKED'. Yes,there is no problem and the program A can run normally. Then why I got bewildered? Because I remember some books(for example,Murach's os/390 and z/os JCL) say that LKED.SYSLIB should contain 'object module' ,not 'load module'. But in the above example,what I supplied to LKED.SYSLIb is a load module and it works too. I also refer to an old IBM doc and find a statement about linkage editor: 'Multiple object modules or load modules can be combined into a single load module by the linkage editor.' So it seems that the input to linkage editor can be either object module or load module?If so,what's the difference between them? If a cobol program statically called a subprogram,when linked,what's the linkage editor really wants:the object module of that subprogram or the load module of that subprogram? Hope someone can give me some help on this. Thanks. -- Best Regards, Johnny Luo ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
