IV82230: INCORRECT 1586-475 (W) NEW DEFINITION OF FUNCTION WARNINGS FOR SOURCE FILES THAT HAVE NOT BEEN MODIFED FROM PDF1 BUILD

XL C for AIX Fix Pack 15 (April 2016 Update) for 12.1
XL C/C++ for AIX Fix Pack 15 (April 2016 Update) for 12.1
XL C for AIX Fix Pack 16 (July 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 for AIX Fix Pack 17 (November 2016 Update) for 12.1
XL C for AIX Fix Pack 18 (February 2017 Update) for 12.1
XL C/C++ for AIX Fix Pack 18 (February 2017 Update) for 12.1
XL C for AIX Fix Pack 19 (August 2017 Update) for 12.1
XL C/C++ for AIX Fix Pack 19 (August 2017 Update) for 12.1
XL C for AIX Fix Pack 20 (March 2018 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
XL C for AIX Fix Pack 21 (January 2019 Update) for 12.1

APAR status

• Closed as program error.

Error description

• The issue is that the compiler incorrectly generates "1586-475
  (W) New definition of function..." warning messges for files
  that have not changed since the PDF1 build step.
  
  If the source files have not been changed from the PDF1 build
  step, it should not issue the above warning on the PDF2 build
  step.
  

Local fix

• N/A
  

Problem summary

• USERS AFFECTED:
  Users with very large complex programs that make use of PDF1 and
  PDF2 compile time and link time options may be affected by this
  issue.
  
  PROBLEM DESCRIPTION:
  The algorithm that was used to map a specific funtion to a hash
  is incorrectly assigning multiple functions to the same hash
  name. As a result, the compiler may incorrectly produce a
  warning message for one of those functions if it wasn't changed;
  and if the other function was changed.
  

Problem conclusion

• The compiler algorithm has been improved to reduce the number of
  hash collision; however, there may still be some occurances of
  these warnings (but not as many as before).
  

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:

  IV82245

Fix information

• Fixed component name

  XL C FOR AIX

• Fixed component ID

  5725C7100

Applicable component levels