IV35873: Unnecessary warning about printf specifiers

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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  • PROBLEM DESCRIPTION: The compiler was issuing out-of-date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 number

    IV35873

  • Reported component name

    XL C FOR AIX

  • Reported component ID

    5725C7100

  • Reported release

    C10

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-01-24

  • Closed date

    2013-03-12

  • Last modified date

    2013-03-13

  • 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



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Document information


More support for:

XL C for AIX
Compiler

Software version:

12.1

Reference #:

IV35873

Modified date:

2013-03-13

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