IJ36340: V16.1 XLCLANG++ HITS LIBCXXABI TERMINATE WITH V17 RUNTIME

APAR status

• Closed as program error.

Error description

• The xlclang++ V16.1 compiler hits libc++abi terminate on AIX
  when running against the V17.1 C++ runtime.
  
  The Open XL V17.1 C/C++ ships with the new libc++.a using
  libcxxabi/libunwind. The new libc++.a is supposed to be binary
  compatible with the V16.1 libc++.a so the installation of V17.1
  compiler will upgrade the libc++.a on the system to the V17.1
  runtime if it is not already at that level.
  
  After the upgrade, clients may see the error.
  

Local fix

• N/A
  

Problem summary

• USERS AFFECTED: Users who run the v16.1 Clangtana compiler
  against the v17.1 C++ runtime on AIX
  

Problem conclusion

• PROBLEM DESCRIPTION:
  The build compiler of the v16.1 xlclang++
  compiler front end incorrectly generates a call to
  __cxa_rethrow() instead of
  _Unwind_Resume() after the inline cleanup. As a result, when
  the v16.1 xlclang++ front end throws an exception,
  __cxa_rethrow() is called
  after the cleanup code. It then calls terminate() to abort the
  compilation
  because there does not exist a caught exception to be re-thrown.
  

Temporary fix

Comments

APAR Information

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

  IJ36335

• 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