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Q35883: FIX: Public Labels Are Prefixed with Underscore Incorrectly

Article: Q35883
Product(s): Microsoft Macro Assembler
Version(s): 5.1
Operating System(s): 
Keyword(s): 
Last Modified: 04-MAY-2001

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The information in this article applies to:

- Microsoft Macro Assembler (MASM), version 5.1 
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SYMPTOMS
========

If you assemble the following program with MASM version 5.1 and examine the
public label, TheProc, you will find an underscore prefixed to it. Another
symptom of the problem may occurs during link time. The linker will generate the
error L2029 unresolved external on public labels.

CAUSE
=====

The space before the comma in the structure initialization of Data1 causes the
problem to occur.

RESOLUTION
==========

Removing the space before the comma in the structure initialization of Data1
will allow you to work around the problem.

STATUS
======

Microsoft has confirmed this to be a problem in MASM version 5.1. This problem
was corrected in MASM version 5.1a.

Sample Code
-----------

  ; Assemble options needed: none

  StrucType STRUC
  Label1  DB "LPT"
  Label2  DB "   "
  StrucType ENDS

  _DATA SEGMENT
  Data1   StrucType < , "1">
  _DATA ENDS

  _TEXT SEGMENT
  ASSUME CS:_TEXT, DS:_DATA
  PUBLIC TheProc

  TheProc PROC NEAR
          mov ax, 4C00h
          int 21h
  TheProc ENDP
  _TEXT ENDS

  END

Additional query words: 5.10 buglist5.10 fixlist5.10a

======================================================================
Keywords          :  
Technology        : kbMASMsearch kbAudDeveloper kbMASM510
Version           : :5.1
Solution Type     : kbfix

=============================================================================

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