IV58104: USING THE READLINKAT SUBROUTINE MAY FAIL WITH _XOPEN_SOURCE 700 APPLIES TO AIX 7100-02

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• If the source code holds the XOPEN_SOURCE Feature Test
  Macro
  with a value of 700, e.g.:
  
  #define _XOPEN_SOURCE 700
  
  includes
  #include <unistd.h>
  
  and then calls the "readlinkat" subroutine, e.g.
  
    rc = readlinkat( fd, path2,  buf, sizeof(buf));
  
  the compilation may fail with an error message similar to
  
  ld: 0711-317 ERROR: Undefined symbol: .__readlink64at
  ld: 0711-345 Use the -bloadmap or -bnoquiet option to
  obtain
      more information.
  

Local fix

• Do not use the XOPEN_SOURCE Feature Test Macro
  by removing line
  
  #define _XOPEN_SOURCE 700
  
  from the source code.
  This will create code which does not comply to the
  definition. Therefore this approach is only valid if
  this definition is not needed.
  

Problem summary

• READLINKAT() MAY FAIL TO LINK WITH _XOPEN_SOURCE 700 AND 64-bit
  

Problem conclusion

• Export the __readlink64at symbol
  

Temporary fix

Comments

• 7100-02 - use AIX APAR IV58104
  7100-03 - use AIX APAR IV59758
  7100-04 - use AIX APAR IV59824
  

APAR Information

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

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

  IV59758 IV59824 U868604

Fix information

• Fixed component name

  AIX V7.1

• Fixed component ID

  5765H4000

Applicable component levels

• R710 PSY U868604

     UP15/01/19 I 1000