IJ02718: FUNCTION CALL NOT USING -QPIC=LARGE TOC ACCESS

XL C for AIX, V13.1.3.5 Fix Pack (July 2018)
XL C/C++ for AIX, V13.1.3.5 Fix Pack (July 2018)
XL C for AIX, V13.1.3.6 Fix Pack (May 2019)
XL C/C++ for AIX, V13.1.3.6 Fix Pack (May 2019)

APAR status

• Closed as program error.

Error description

• In a large application with more than 64k TOC data the
  -qpic=large option is used to generate two instructions for
  each TOC access to avoid TOC overflow code-fixes by the linker.
  
  In most cases the two instruction TOC access is used, however in
  certain cases related to compiler-generated C++ helper
  functions, the old one instruction TOC access is used, causing
  the linker to generate fix-up code and issue a warning:
  
  
     ld: 0711-783 WARNING: TOC overflow. TOC size: 160240
     Maximum size: 65536
       Extra instructions are being generated for each reference
       to a TOC symbol if the symbol is in the TOC overflow area.
  

Local fix

Problem summary

• PROBLEM DESCRIPTION:
  When building -qpic=large large TOC code, the compiler is not
  generating the correct two instruction sequence for
  compiler-generated thunk functions.
  
  USERS AFFECTED:
  Users compiling with -qpic=large
  

Problem conclusion

• The problem has been fixed, and the correct code sequence is
  now generated.
  

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:

Fix information

• Fixed component name

  XL C FOR AIX

• Fixed component ID

  5725C7100

Applicable component levels

• RD13 PSY

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