IV35873: Unnecessary warning about printf specifiers

Fixes are available

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PROBLEM DESCRIPTION: The compiler was issuing out-of-date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

[{"Line of Business":{"code":"LOB57","label":"Power"},"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSGH2K","label":"XL C for AIX"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"12.1"}]

Document Information

Modified date:
01 October 2021

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IV35873: Unnecessary warning about printf specifiers

Fixes are available

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APAR status

Closed as program error.

Error description

Local fix

Problem summary

Problem conclusion

Temporary fix

Comments

APAR Information

APAR number

Reported component name

Reported component ID

Reported release

Status

PE

HIPER

Special Attention

Submitted date

Closed date

Last modified date

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:

Fix information

Fixed component name

Fixed component ID

Applicable component levels

Document Information

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