LI77118: WARNING ABOUT PASSING NON-POD VIA ELLIPSIS

XL C/C++ for Blue Gene/Q Fix Pack 12 (May 2015 Update) for 12.1
XL C/C++ for Blue Gene/Q Fix Pack 14 (May 2016 Update) for 12.1
XL C/C++ for Blue Gene/Q Fix Pack 15 (October 2017 Update) for 12.1
November 2012 Update for XL C/C++ for Blue Gene/Q, V12.1
February 2013 Update for XL C/C++ for Blue Gene/Q, V12.1
May 2013 Update for XL C/C++ for Blue Gene/Q, V12.1
XL C/C++ for Blue Gene/Q Fix Pack 5 (August 2013 Update) for 12.1
XL C/C++ for Blue Gene/Q Fix Pack 6 (November 2013 Update) for 12.1
XL C/C++ for Blue Gene/Q Fix Pack 7 (February 2014 Update) for 12.1
XL C/C++ for Blue Gene/Q Fix Pack 8 (May 2014 Update) for 12.1
XL C/C++ for Blue Gene/Q Fix Pack 9 (August 2014 Update) for 12.1
XL C/C++ for Blue Gene/Q Fix Pack 10 (November 2014 Update) for 12.1
XL C/C++ for Blue Gene/Q Fix Pack 11 (February 2015 Update) for 12.1
XL C/C++ for Blue Gene/Q Fix Pack 13 (August 2015 Update) for 12.1

APAR status

• Closed as program error.

Error description

• Compiler incorrectly issues spurious warning about passing
  non-POD via ellipsis.
  
  Consider the following example:
  
  $ cat test.cpp
  ////////////////////////////////////////////
  #include <string>
  std::string foo(std::string s, ...) {
    return "";
  }
  
  int main(int argc, char** argv) {
    foo("the nameless are like dust");
  
    return 0;
  }
  ////////////////////////////////////////////
  
  Warning is issued at the compile step:
  
  xlC -o test_program  test.cpp
  "test.cpp", line 8.7: 1540-2924 (W) Cannot pass an argument of
  non-POD class type
  "std::basic_string<char,std::char_traits<char>,std::allocator<ch
  ar> >" through ellipsis.
  

Local fix

• N/A
  

Problem summary

• Spurious warning about passing non-POD via ellipsis
  

Problem conclusion

• The check producing the message was adjusted to account for the
  compiler generated class-return argument.
  

Temporary fix

Comments

APAR Information

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

  IV28123

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

Fix information

• Fixed component name

  XL C/C++ FOR BG

• Fixed component ID

  5799AG100

Applicable component levels