IJ36786: MUNCH UTILITY UNABLE TO PROCESS V16.1 LIBC.A

APAR status

• Closed as program error.

Error description

• The legacy 'munch' utility used to gather static
  constructor/destructor calls is unable to process the new XL
  C/C++ runtime library, libC.a.  The tool outputs an error
  message:
  
  
     munch: Error reading input file libC.a
  
  
  Note:  this only affects users of the XL C/C++ for AIX, V12.1
  compiler, or users of later versions of the compiler that force
  munch usage.  Starting with V13.1.0 and up, the default
  method used to gather ctor/dtor calls is to use the AIX linker's
  -bcdtors option.
  

Local fix

Problem summary

• PROBLEM DESCRIPTION:
  The munch tool checks the magic number of the auxiliary header
  of each member in libC.a. If the number is not 0x0107, 0x0107,
  or 0x010b, it displays 1547-005 and fails. While the shrcore.o
  in the libC.a built on AIX 6.1 has a magic number of 0x010b,
  the one in the libC.a built on AIX 7.1 has a magic number 0x0
  and therefore munch fails. However, when the vstamp field is
  greater than 1, magic number being 0x0 is valid.
  
  USERS AFFECTED:
  Users who use pre V16.1 munch against V16.1 libC.a.
  

Problem conclusion

• This problem is fixed to allow using V12.1 tools against V16.1
  libC.a.
  

Temporary fix

Comments

APAR Information

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

  IJ22055

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

Fix information

• Fixed component name

  XL C/C++ FOR AI

• Fixed component ID

  5725C7200

Applicable component levels