PI88204: INCORRECT C++ CALLING CONVENTION FOR STRUCT IN XPLINK MODE CONTINUE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• The April 2017 z/OS XL C/C++ V2R2 PTF contained APAR PI79089 for
  an issue with the C/C++ XPLINK calling convention for structs
  containing floating point values:
  
       PI79089: INCORRECT C++ CALLING CONVENTION FOR STRUCT IN
                XPLINK MODE
       http://www.ibm.com/support/docview.wss?uid=swg1PI79089
  
  The fix was enabled by using option: FEDBG(-qdebug=EnableHFA).
  
  
  A new fix has now been implemented that fixes the issue by
  default, and no longer requires the FEDBG option.  The option
  will now be ignored by the compiler and will not affect
  generated code.
  

Local fix

• N/A
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of XLC mixing C and C++ with a         *
  *                 function call returning POD with 2 floating  *
  *                 point members in XPLINK mode.                *
  ****************************************************************
  * PROBLEM DESCRIPTION: C++ does not use floating point         *
  *                      registers to return C struct with 2     *
  *                      floating point members. When this       *
  *                      function is called within C++ there is  *
  *                      no issue. However, when it's called     *
  *                      from a function compiled with the C     *
  *                      compiler the caller will not get the    *
  *                      correct value back.                     *
  ****************************************************************
  .
  

Problem conclusion

• Apply service provided. Fix is now enabled by default.
  

Temporary fix

Comments

APAR Information

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

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

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 UI50367

     UP17/10/04 P F710

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.