Static or dynamic call in COBOL.

[R Patil]

Hi,

I've this with me in a program:

Code: Select all

01 WS-PROG PIC X(8) VALUE ' DATEROUT'.
..
CALL WS-PROG.

Compiler options used: NODYNAM

Is this a dynamic or static call? As the option is NODYNAM, I'd assume it's a static call. But one of collegues says otehrwise. Please share yourviews.

[William Collins]

Whenever CALL identifier is used it is a dynamic CALL. It has to be, since the compiler cannot always reliably know what value the identifier has from CALL to CALL at run-time.

Compiler option DYNAM/NODYNAM only controls the behaviour of CALL literal.

[R Patil]

Whenever CALL identifier is used it is a dynamic CALL. It has to be, since the compiler cannot always reliably know what value the identifier has from CALL to CALL at run-time.

Compiler option DYNAM/NODYNAM only controls the behaviour of CALL literal.

Thanks but that's strange. I always thought it call depends on the compiler option!

Then what's the use of making a default compiiler option as NODYNAM and mandate it on the shop while as a programmer I can anyways make it behave DYAM?

[Robert Sample]

I think you have totally missed the point. CALL WS-PROG, where WS-PROG has the value 'DATEROUT' will be a dynamic call -- period. This is because COBOL does not know the name of the subprogram to be called until the program is executing.

However, CALL 'DATEROUT' may be either a static OR dynamic call -- depending upon the compiler option. If the compiler option is NODYNAM, you are not going to make it a dynamic call since the compiler can identify the subprogram at COMPILE time and take that into account -- so at execution time the name of the subprogram has been fixed and is part of the load module.

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