Microsoft KB Archive/84744

= Conditionally Assembling the END Directive =

Article ID: 84744

Article Last Modified on 10/17/2003

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APPLIES TO


 * Microsoft Macro Assembler 6.0 Standard Edition
 * Microsoft Macro Assembler 6.0a
 * Microsoft Macro Assembler 6.0b

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This article was previously published under Q84744



SUMMARY
Sometimes it is helpful to conditionally have a starting label specified with the END directive; for example, to use preprocessor directives to specify various END directives: IFDEF xyz END start_label ELSE END ENDIF Note, however, that this approach will not work. As soon as MASM encounters the first END directive it will stop assembling. The assembler stops regardless of whether or not the END directive is inside a preprocessor block. This is the expected behavior for the assembler.

A method that can be used to accomplish this task involves using a conditionally defined text equate with the END directive. The following sample code demonstrates this method:

Sample Code
; Assemble options needed: /Dxyz

.MODEL small

.STACK 4096

.CODE start_label: mov ax, 4C00h int 21h

IFDEF xyz end_label EQU  ELSE end_label EQU <> ENDIF

END end_label

Additional query words: kbinf 6.00 6.00a 6.00b

Keywords: KB84744

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