IV35873: Unnecessary warning about printf specifiers

March 2013 PTF for XL C for AIX, V12.1
March 2013 PTF for XL C/C++ for AIX, V12.1

APAR status

• Closed as program error.

Error description

• The above test case tries to use %a, %A, %j, %t, %z printf
  format specifiers introduced by C99.
  
  XLC/C++ compilers work correctly - test case compiles and runs
  with expected output. However, during compilation, C/C++ gives
  out the following informational/warning messages when
  -qformat=all -qinfo=all is present:
  
  1540-2839 (I) The platform does not support the use of a
  non-portable extension character 'j' in the format.
  
  This informational message is incorrect and unnecessary.
  
  ====TEST CASE:
  $cat xlc12_defect_format_conversion.c
  #include <stdio.h>
  #include <stdint.h>
  #include <stddef.h>
  
  signed main(void) {
  
    printf("%A\n", 10.5);
    printf("%a\n", 10.5);
    printf("%ju\n", (uintmax_t)1000000);
    printf("%td\n", (ptrdiff_t)1000000);
    printf("%zu\n", (size_t)1000000);
  
    return 0;
  }
  
  
  $ xlc -qlanglvl=extc1x -qinfo=all -qformat=all
  xlc12_defect_format_conversion.c
  
  $xlC -qsourcetype=c++ -qlanglvl=extended0x -qinfo=all
  -qformat=all xlc12_defect_format_conversion.c
  
  
  ====ACTUAL OUTPUT:
  "xlc12_defect_format_conversion.c", line 73.10: 1540-2839 (I)
  The platform does not support the use of a non-portable
  extension character 'A' in the format.
  "xlc12_defect_format_conversion.c", line 74.10: 1540-2839 (I)
  The platform does not support the use of a non-portable
  extension character 'a' in the format.
  "xlc12_defect_format_conversion.c", line 81.10: 1540-2839 (I)
  The platform does not support the use of a non-portable
  extension character 'j' in the format.
  "xlc12_defect_format_conversion.c", line 81.10: 1540-2845 (W)
  Invalid uintmax_t format for unsigned long long argument type
  in argument 2.
  "xlc12_defect_format_conversion.c", line 87.10: 1540-2839 (I)
  The platform does not support the use of a non-portable
  extension character 't' in the format.
  "xlc12_defect_format_conversion.c", line 93.10: 1540-2839 (I)
  The platform does not support the use of a non-portable
  extension character 'z' in the format.
  
  ====EXPECTED OUTPUT:
  None of these Informational Messages.
  

Local fix

• N/A
  

Problem summary

• PROBLEM DESCRIPTION: The compiler was issuing out-of-date
  informational messages for printf format specifiers that are
  now part of the C99 standard.
  
  USERS AFFECTED: Users of -qinfo=all -qformat=all looking for
  information about non-portable format specifiers
  

Problem conclusion

• The messages have been updated to include C99 format specifiers
  Aatjuz
  

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:

  IV37954 LI77349 LI77404

Fix information

• Fixed component name

  XL C FOR AIX

• Fixed component ID

  5725C7100

Applicable component levels

• RC10 PSY U858497

     UP C