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* [Bug c/28199] New: -Wmissing-format-attribute produces false positives on vprintf() like functions
@ 2006-06-29 11:27 flameeyes at gentoo dot org
2006-06-29 11:42 ` [Bug c/28199] " flameeyes at gentoo dot org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: flameeyes at gentoo dot org @ 2006-06-29 11:27 UTC (permalink / raw)
To: gcc-bugs
As the summary says, -Wmissing-format-attribute produces false positive
warnings when a function is declared to use a vprintf-like prototype, and this
can't be fixed because the printf attribute does not support varargs functions
(of course).
I'm attaching a testcase that should identify the problem. I hope it's in the
right format, I don't follow development closely, so I just adapted a testcase
from Joseph S. Myers that was added with the fix to bug #1017.
HTH,
Diego
--
Summary: -Wmissing-format-attribute produces false positives on
vprintf() like functions
Product: gcc
Version: 4.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: flameeyes at gentoo dot org
GCC build triplet: x86_64-unknown-linux-gnu
GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28199
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c/28199] -Wmissing-format-attribute produces false positives on vprintf() like functions
2006-06-29 11:27 [Bug c/28199] New: -Wmissing-format-attribute produces false positives on vprintf() like functions flameeyes at gentoo dot org
@ 2006-06-29 11:42 ` flameeyes at gentoo dot org
2006-06-29 11:49 ` schwab at suse dot de
2006-06-29 12:46 ` flameeyes at gentoo dot org
2 siblings, 0 replies; 4+ messages in thread
From: flameeyes at gentoo dot org @ 2006-06-29 11:42 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from flameeyes at gentoo dot org 2006-06-29 11:27 -------
Created an attachment (id=11780)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=11780&action=view)
impossible-missing-format-attribute.c
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28199
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c/28199] -Wmissing-format-attribute produces false positives on vprintf() like functions
2006-06-29 11:27 [Bug c/28199] New: -Wmissing-format-attribute produces false positives on vprintf() like functions flameeyes at gentoo dot org
2006-06-29 11:42 ` [Bug c/28199] " flameeyes at gentoo dot org
@ 2006-06-29 11:49 ` schwab at suse dot de
2006-06-29 12:46 ` flameeyes at gentoo dot org
2 siblings, 0 replies; 4+ messages in thread
From: schwab at suse dot de @ 2006-06-29 11:49 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from schwab at suse dot de 2006-06-29 11:42 -------
>From (gcc)Function Attributes:
For functions where the
arguments are not available to be checked (such as `vprintf'),
specify the third parameter as zero.
void foo (const char *, va_list) __attribute__ ((format (printf, 1, 0)));
--
schwab at suse dot de changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |INVALID
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28199
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c/28199] -Wmissing-format-attribute produces false positives on vprintf() like functions
2006-06-29 11:27 [Bug c/28199] New: -Wmissing-format-attribute produces false positives on vprintf() like functions flameeyes at gentoo dot org
2006-06-29 11:42 ` [Bug c/28199] " flameeyes at gentoo dot org
2006-06-29 11:49 ` schwab at suse dot de
@ 2006-06-29 12:46 ` flameeyes at gentoo dot org
2 siblings, 0 replies; 4+ messages in thread
From: flameeyes at gentoo dot org @ 2006-06-29 12:46 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from flameeyes at gentoo dot org 2006-06-29 12:17 -------
Sorry, I think I misunderstood the error messages' chain, as when the
__attribute__ is malformed (forgot a '('), the warning about the possible
candidate appear anyway, so i thought it was simply being ignored with '0'
parameter.
Sorry :(
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28199
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2006-06-29 12:17 UTC | newest]
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2006-06-29 11:27 [Bug c/28199] New: -Wmissing-format-attribute produces false positives on vprintf() like functions flameeyes at gentoo dot org
2006-06-29 11:42 ` [Bug c/28199] " flameeyes at gentoo dot org
2006-06-29 11:49 ` schwab at suse dot de
2006-06-29 12:46 ` flameeyes at gentoo dot org
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