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* [Bug c/108690] New: -Wstrict-prototypes too picky for C23
@ 2023-02-07 2:50 eggert at gnu dot org
2023-02-07 2:54 ` [Bug c/108690] " pinskia at gcc dot gnu.org
2023-02-07 19:09 ` sam at gentoo dot org
0 siblings, 2 replies; 3+ messages in thread
From: eggert at gnu dot org @ 2023-02-07 2:50 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108690
Bug ID: 108690
Summary: -Wstrict-prototypes too picky for C23
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: eggert at gnu dot org
Target Milestone: ---
We ran into this problem in Gnulib when considering how to migrate towards C23.
With GCC 12.2.1 20221121 (Red Hat 12.2.1-4) on x86-64, compile the following
one-line program t.c with 'gcc -S -std=gnu2x -Wstrict-prototypes t.c':
int f ();
GCC complains:
t.c:1:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
1 | int f ();
| ^~~
This diagnostic is incorrect, because in C23 every function declaration and
definition is prototyped: 'int f ();' means the same thing as 'int f (void);'.
This incorrect warning is causing us to think we should stop using
-Wstrict-prototypes, but that would have a negative consequence in the common
case of pre-C23 builds.
In short, -Wstrict-prototypes should be a no-op in C23, since all functions are
prototyped in C23.
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c/108690] -Wstrict-prototypes too picky for C23
2023-02-07 2:50 [Bug c/108690] New: -Wstrict-prototypes too picky for C23 eggert at gnu dot org
@ 2023-02-07 2:54 ` pinskia at gcc dot gnu.org
2023-02-07 19:09 ` sam at gentoo dot org
1 sibling, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-02-07 2:54 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108690
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Status|UNCONFIRMED |RESOLVED
Target Milestone|--- |13.0
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Fixed on the trunk by r13-2349-g0a4b219d39c74ae
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c/108690] -Wstrict-prototypes too picky for C23
2023-02-07 2:50 [Bug c/108690] New: -Wstrict-prototypes too picky for C23 eggert at gnu dot org
2023-02-07 2:54 ` [Bug c/108690] " pinskia at gcc dot gnu.org
@ 2023-02-07 19:09 ` sam at gentoo dot org
1 sibling, 0 replies; 3+ messages in thread
From: sam at gentoo dot org @ 2023-02-07 19:09 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108690
--- Comment #2 from Sam James <sam at gentoo dot org> ---
Please add https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108694 to See Also.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2023-02-07 2:50 [Bug c/108690] New: -Wstrict-prototypes too picky for C23 eggert at gnu dot org
2023-02-07 2:54 ` [Bug c/108690] " pinskia at gcc dot gnu.org
2023-02-07 19:09 ` sam at gentoo dot org
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