IV49636: COMPILER ISSUES UNDEFINED REFERENCE ERROR

XL C/C++ for AIX Fix Pack 5 (September 2013 PTF) for 12.1
XL C/C++ for AIX Fix Pack 7 (January 2014 PTF) for 12.1
XL C/C++ for AIX Fix Pack 8 (March 2014 PTF) for 12.1
XL C/C++ for AIX Fix Pack 11 (February 2015 PTF) for 12.1
XL C/C++ for AIX Fix Pack 12 (May 2015 PTF) for 12.1
XL C/C++ for AIX Fix Pack 13 (August 2015 Update) for 12.1
XL C/C++ for AIX Fix Pack 14 (December 2015 Update) for 12.1
XL C/C++ for AIX Fix Pack 15 (April 2016 Update) for 12.1
XL C/C++ for AIX Fix Pack 16 (July 2016 Update) for 12.1
XL C/C++ for AIX Fix Pack 17 (November 2016 Update) for 12.1
XL C/C++ for AIX Fix Pack 18 (February 2017 Update) for 12.1
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 6 (December 2013 PTF) for 12.1
XL C/C++ for AIX Fix Pack 9 (July 2014 PTF) for 12.1
XL C/C++ for AIX Fix Pack 10 (October 2014 PTF) 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

• Consider the following example:
  
  
  File main.cpp:
  ---------------------------------
  $cat main.cpp
  #include "virtual.h"
  
  int main(){
  
   /// --- comment out below to avoid error (a) ---
   /// --- (start) ---
   vector1 vec1; f(vec1); // <- error
   /// --- (end) ---
  }
  
  
  File vector.cpp
  ---------------------------------
  $cat vector.cpp
  #include "vector.h"
  
  void f(const vector1& v) {}
  
  
  
  File vector.h:
  ---------------------------------
  $cat vector.h
  #include <cstddef> // <- for std::size_t
  
  // template class and specialization
  template <std::size_t N, typename T> class vector {};
  template <typename T> class vector<2,T> {};
  
  typedef vector<2,double> vector1;
  
  // function using template
  void f(const vector1& v);
  
  
  
  Compile as:
  
  xlC -g -o vector.o -c vector.cpp
  xlC -g -o main.o -c main.cpp
  xlC -g main.o vector.o -o test
  
  At the last step (linking) compiler incorrectly issues the
  undefined reference error:
  
  main.o: In function `main':
  main.cpp:7: undefined reference to `f(vector<(size_t)1, double>
  const&)'
  

Local fix

• N/A
  

Problem summary

• Undefined reference error
  

Problem conclusion

• The problem had been fixed
  

Temporary fix

Comments

APAR Information

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

  LI77494

• 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 PSN UP06/09/13

     C