IZ91298: HEADER FILES CHANGING OBJECT_MODEL

May 2011 PTF for XL C/C++ for AIX, V11.1
August 2011 PTF for XL C/C++ for AIX, V11.1
November 2011 PTF for XL C/C++ for AIX, V11.1
January 2012 PTF for XL C/C++ for AIX, V11.1
April 2012 PTF for XL C/C++ for AIX, V11.1
July 2012 PTF for XL C/C++ for AIX, V11.1
October 2012 PTF for XL C/C++ for AIX, V11.1
February 2013 PTF for XL C/C++ for AIX, V11.1
XL C/C++ for AIX Fix Pack 14 (May 2013 PTF) for 11.1
XL C/C++ for AIX Fix Pack 15 (August 2013 PTF) for 11.1
XL C/C++ for AIX Fix Pack 16 (November 2013 PTF) for 11.1
XL C/C++ for AIX Fix Pack 17 (February 2014 PTF) for 11.1
XL C/C++ for AIX Fix Pack 18 (May 2014 PTF) for 11.1
XL C/C++ for AIX Fix Pack 19 (August 2014 PTF) for 11.1
XL C/C++ for AIX Fix Pack 20 (November 2014 PTF) for 11.1
XL C/C++ for AIX Fix Pack 21 (April 2015 PTF) for 11.1
XL C/C++ for AIX Fix Pack 22 (September 2015 PTF) for 11.1
XL C/C++ for AIX Fix Pack 23 (March 2016 PTF) for 11.1
XL C/C++ for AIX Fix Pack 24 (September 2016 PTF) for 11.1

APAR status

• Closed as program error.

Error description

• When including header files for the TR1 unordered associative
  containers and defining macro __IBMCPP_TR1__, the object model
  of the compile is set to 'compat' numerous times and will
  override previous object model settings.
  
  If code is compiled with different object models, compile errors
  may be seen:
  
  "test.cpp", line 20.7: 1540-2200 (S) Class "foobar" has base
  classes with different object models.
  
  As well, the object model setting affects name mangling which
  will affect expected exported/imported symbol names.
  

Local fix

• Modify code to explicitly use a specific object model using the
  #pragma object_model setting.
  

Problem summary

• PROBLEM DESCRIPTION:
  Some C++ header files are changing the object model with
  #pragma object_model(compat).
  
  USERS AFFECTED:
  Programs using a non-compat object model that include an
  affected C++ header files.
  

Problem conclusion

• The C++ header files will now change the object model back to
  its original setting.
  

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:

  LI76097

Fix information

• Fixed component name

  XL C/C++ AIX

• Fixed component ID

  5724X1300

Applicable component levels