PH54349: OPENXL COMPILE FAILS USING NANOSLEEP (KEYWORDS: ZOS0301T/K)

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• When compiling with nanosleep() function the compiler has an
  ambiguous call error to nanosleep. The testcase used below:
  ```
  >cat test.C
  #include <time.h>
  extern "C" int nanosleep(const timespec *, timespec *);
  #include <iostream>
  >
  ```
  
  When compiling this testcase error is shown below:
  ```
  >./compile.sh
  + ./ibm-clang++ -m64 -o testC test.C
  In file included from test.C:3:
  In file included from ./bin/../include/c++/v1/iostream:37:
  In file included from ./bin/../include/c++/v1/ios:215:
  In file included from ./bin/../include/c++/v1/__locale:18:
  In file included from ./bin/../include/c++/v1/memory:820:
  In file included from
  ./bin/../include/c++/v1/__memory/shared_ptr.h:34:
  In file included from ./bin/../include/c++/v1/atomic:524:
  In file included from
  ./bin/../include/c++/v1/__thread/timed_backoff_policy.h:16:
  ./bin/../include/c++/v1/__threading_support:420:11: error: call
  to 'nanosleep' is ambiguous
     while (nanosleep(&__ts, &__ts) == -1 && errno == EINTR);
            ^~~~~~~~~
  test.C:2:16: note: candidate function
  extern "C" int nanosleep(const timespec *, timespec *);
                 ^
  ./bin/../include/c++/v1/__support/ibm/nanosleep.h:17:22: note:
  candidate function
  _LIBCPP_FUNC_VIS int nanosleep(const struct timespec* , struct
  timespec* );
                       ^
  1 error generated.
  + ./testC
  ./compile.sh: line 5: ./testC: not found
  >
  ```
  The compiler should compile with the nanosleep() function.
  KEYWORDS: ZOS0301T/K
  

Local fix

• NA
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of Open XL C/C++ 1.1                   *
  ****************************************************************
  * PROBLEM DESCRIPTION: Fix possible ambiguous call to          *
  *                      nanosleep when mixing C++ library       *
  *                      headers                                 *
  *                      with user provided definition.          *
  ****************************************************************
  * RECOMMENDATION: Install the PTF                              *
  ****************************************************************
  If the user tries to provide their own version of nanosleep(),
  they
  can encounter an ambiguous call error with the C++ library
  headers.
  

Problem conclusion

• Update the C++ library headers so the call is not ambiguous. The
  User should install the ptf to solve the problem.
  

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:

  UI92320

Modules/Macros

• CNWPHPAX CNWSNPAX
  

Fix information

• Fixed component name

  C/C++ FOR MVS

• Fixed component ID

  56551210A

Applicable component levels

• R7C2 PSY UI92320

     UP23/06/22 P F306

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.