LI75006: INLINE FUNCTION REFERENCED NOT DEFINED ERROR

May 2010 Update for XL C/C++ Advanced Edition for Blue Gene/P, V9.0
December 2010 Update for XL C/C++ Advanced Edition for Blue Gene/P, V9.0
XL C/C++ Advanced Edition for Blue Gene/P Fix Pack 17 (October 2013 Update) for 9.0
April 2011 Update for XL C/C++ Advanced Edition for Blue Gene/P, V9.0
August 2011 Update for XL C/C++ Advanced Edition for Blue Gene/P, V9.0
April 2012 Update for XL C/C++ Advanced Edition for Blue Gene/P, V9.0
August 2012 Update for XL C/C++ Advanced Edition for Blue Gene/P, V9.0

APAR status

• Closed as program error.

Error description

• A reduced and legitimate test case generated error complaining
  the inline function is reference, but it is not defined.
  
  class A
  {public:
  virtual int boo() { return 1; }
  };
  
  class B :public virtual A
  {public:
  virtual int boo() { return 4; }
  
  virtual ~B();
  virtual void foo();
  };
  
  void B::foo()
  {}
  
  "inline_virtual2.C", line 8.13: 1540-0723 (S) The inline
  function "int
  boo()" is referenced, but it is not defined.
  

Local fix

• Use -qkeepinlines or,
  Use global volatile function pointers to reference the functions
  for which this error occurs.
  

Problem summary

• USER AFFECTED:
  Programs that meet the following criterias:
  1. A derived class with virtual inheritance of its base class
  2. The derived class has inline and non-inline virtual
  functions declared.
  3. The distinguishing function (first non-inline virtual
  function) of the
  derived class is not defined
  
  PROBLEM DESCRIPTION:
  In the case where the distinguishing function is not
  defined, XLC still generates virtual thunks for the
  inline virtual functions (this does not match the behavior of
  GCC
  where virutal thunks are not created).
  The virtual thunk declarations cause error since
  they have no implemenation and are needed to be inlined.
  

Problem conclusion

• Disable the generation of the virtual thunk declartions for
  classes
  without defined distinguishing function.
  

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:

  IZ70955 LI75560 LI75591 LI75712

Fix information

• Fixed component name

  XL C/C++ AE BG/

• Fixed component ID

  5799HJE00

Applicable component levels

• R900 PSY

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