IV98017: IDENTICAL TEMPLATES HAVE IDENTICAL MANGLED NAME FUNCTION SIGNATURE ERROR

XL C/C++ for AIX Fix Pack 19 (August 2017 Update) for 12.1
XL C/C++ for AIX Fix Pack 20 (March 2018 Update) for 12.1
XL C/C++ for AIX Fix Pack 21 (January 2019 Update) for 12.1

APAR status

• Closed as program error.

Error description

• Two identical template functions that differ only by an extra
  whitespace character are treated by the compiler as two separate
  template declarations.  The mangled names of both functions are
  the same, causing an error.
  
  
  
     === EXAMPLE ===
  
  void MyClass<unsigned long,Update>::func()
  void MyClass<unsigned long, Update>::func()
  
  
  1540-0704 (S) The definitions of "void MyClass<unsigned
  long,Update>::func()" and "void MyClass<unsigned long,
  Update>::func()" have the same linkage signature
  "_ZN7MyClassIm6UpdateE4funcEv".
  

Local fix

• N/A
  

Problem summary

• USERS AFFECTED:
  The problem may be seen with functions containing template
  arguments inside
  inside the function arguments
  
  PROBLEM DESCRIPTION:
  The compiler incorrectly created 2 declarations of the same
  which causes
  issues with name mangling and overload resolution
  

Problem conclusion

• This issue has now been fixed
  

Temporary fix

Comments

APAR Information

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

  LI79547

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

Fix information

• Fixed component name

  XL C/C++ FOR AI

• Fixed component ID

  5725C7200

Applicable component levels

• RC10 PSY

     UP