LI77701: ENABLE -QNOSAVE AS THE DEFAULT FOR _R INVOCATION

XL Fortran for Linux Fix Pack 6 (February 2014 Update) for 14.1
XL Fortran for Linux Fix Pack 7 (May 2014 Update) for 14.1

APAR status

• Closed as program error.

Error description

• Currently, "All compiler command invocations except f77,
  fort77, xlf, xlf_r and xlf_r7 use -qnosave by default."
  
  With -qsmp=omp or the _r invocation, -qnosave is required. If a
  user forgot to specify -qnosave with -qsmp=omp or _r invocation
  compilations, the multithreaded program might malfunction at
  runtime. It's not obvious to debug such failures.
  

Local fix

• Specify -qnosave as required.
  

Problem summary

• PROBLEM DESCRIPTION: XL Fortran enables the -qsave and
  -qxlf77=persistent options by default in the xlf_r invocation.
  These
  options store some entities in static storage, which is not
  thread-safe.  The compiler reference
  recommends against using this invocation for threaded programs
  without explicitly specifying
  -qnosave / -qxlf77=nopersistent.  The compiler does not warn
  the user directly, however.
  USERS AFFECTED: Users of the xlf_r and related invocations
  

Problem conclusion

• XL Fortran xlf_r and bgxlf_r invocations have been changed to
  enable -qnosave or -qxlf77=nopersistent by default. The change
  ensures thread safety for these commands.  If your threaded
  program requires -qsave or -qxlf77=persistent, specify these
  options explicitly.
  Refer to this Technote for more information on the change and
  possible side effect:
  http://www-01.ibm.com/support/docview.wss?uid=swg21656184
  

Temporary fix

Comments

APAR Information

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

  LI77527

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

Fix information

• Fixed component name

  XL FORTRAN LINU

• Fixed component ID

  5725C7500

Applicable component levels

• RE10 PSY

     UP