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PI76637: BAD @@EXT@0 AND @@EXT@-1 SYMBOLS GENERATED WITH METAL C WITH DEBUG

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APAR status

  • Closed as program error.

Error description

  • When compiling Metal C code with the DEBUG option, duplicate and
invalid symbols are generated in the assembly output.

> xlc -Wc,METAL,LONGNAME,ILP32,DEBUG s.c -S
>
> cat s.s | grep "@@EXT@0"
@@EXT@0  DS    0H          029221
@@EXT@0  DS    0H          029221
@@EXT@0  DS    0H          029434
> cat s.s | grep "@@EXT@-1"
@@EXT@-1 DS    0H          029436
@@EXT@-1 DS    0H          029436
@@EXT@-1 DS    0H          029436
@@EXT@-1 DS    0H          029436
@@EXT@-1 DS    0H          029436
>

The '@@EXT@0' symbol is duplicated many times.  The '@@EXT@-1'
symbol name is invalid.

Local fix

  • 



Problem summary


    

  • ****************************************************************
* USERS AFFECTED: Users of XLC on zOS Metal C + DEBUG          *
****************************************************************
* PROBLEM DESCRIPTION: Duplicate labels generated by the       *
*                      compiler cause the assembler to fail.   *
****************************************************************
.

    



Problem conclusion


    

  • Apply service provided.

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    PI76637
    • 

  • Reported component name
    C/C++ FOR MVS
    • 

  • Reported component ID
    56551210A
    • 

  • Reported release
    7A0
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2017-02-15
    • 

  • Closed date
    2017-04-21
    • 

  • Last modified date
    2018-03-27
    • 





    

  • APAR is sysrouted FROM one or more of the following:
    

    • 

  • APAR is sysrouted TO one or more of the following:
    

    
PI77558 UI46641 PI95831
    

    • 



Modules/Macros


    

  • CCNECICS CCNECWI  CCNED220 CCNEDSCT CCNEDWRT CCNEFILT CCNEHIFC
CCNEMDEP CCNEOPTP CCNEP    CCNEPP   CCNETBY  CCNMSGE  CCNMSGT

    



Fix information


    

  • Fixed component name
    C/C++ FOR MVS
    • 

  • Fixed component ID
    56551210A
    • 



Applicable component levels


    

  • R7A0  PSY  UI46641
       UP17/06/08  P  F706
    • 



Fix is available


    

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Document Information


            

            


                        

            Modified date:
            

            09 August 2024
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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