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* [Bug c/102821] New: Tentative definition of variable with internal linkage has incomplete non-array type: missing diagnostics
@ 2021-10-18 20:09 pavel.morozkin at gmail dot com
2021-10-18 20:39 ` [Bug c/102821] " pinskia at gcc dot gnu.org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: pavel.morozkin at gmail dot com @ 2021-10-18 20:09 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102821
Bug ID: 102821
Summary: Tentative definition of variable with internal linkage
has incomplete non-array type: missing diagnostics
Product: gcc
Version: 11.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: pavel.morozkin at gmail dot com
Target Milestone: ---
Sample code (t940.c):
static struct s foo;
static struct s {int a;} foo;
Invocation:
$ gcc t940.c -c -std=c11 -pedantic -Wall -Wextra -Wno-unused-variable
Expected diagnostics:
t940.c:1:17: warning: tentative definition of variable with internal linkage
has incomplete non-array type 'struct s'
[-Wtentative-definition-incomplete-type]
Actual diagnostics:
<nothing>
Notes:
1. C11, 6.9.2 External object definitions, 3:
> If the declaration of an identifier for an object is a tentative definition and has internal linkage, the declared type shall not be an incomplete type.
2. C11, 4. Conformance, 1:
> In this International Standard, ‘‘shall’’ is to be interpreted as a requirement on an implementation or on a program; conversely, ‘‘shall not’’ is to be interpreted as a prohibition.
^ permalink raw reply [flat|nested] 4+ messages in thread* [Bug c/102821] Tentative definition of variable with internal linkage has incomplete non-array type: missing diagnostics 2021-10-18 20:09 [Bug c/102821] New: Tentative definition of variable with internal linkage has incomplete non-array type: missing diagnostics pavel.morozkin at gmail dot com @ 2021-10-18 20:39 ` pinskia at gcc dot gnu.org 2021-10-18 21:51 ` pavel.morozkin at gmail dot com 2021-10-18 22:05 ` jsm28 at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: pinskia at gcc dot gnu.org @ 2021-10-18 20:39 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102821 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Last reconfirmed| |2021-10-18 Ever confirmed|0 |1 Status|UNCONFIRMED |NEW --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Confirmed. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c/102821] Tentative definition of variable with internal linkage has incomplete non-array type: missing diagnostics 2021-10-18 20:09 [Bug c/102821] New: Tentative definition of variable with internal linkage has incomplete non-array type: missing diagnostics pavel.morozkin at gmail dot com 2021-10-18 20:39 ` [Bug c/102821] " pinskia at gcc dot gnu.org @ 2021-10-18 21:51 ` pavel.morozkin at gmail dot com 2021-10-18 22:05 ` jsm28 at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: pavel.morozkin at gmail dot com @ 2021-10-18 21:51 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102821 --- Comment #2 from Pavel M <pavel.morozkin at gmail dot com> --- Addition to "Notes" above. 3. C11, 5.1.1.3 Diagnostics, 1: > A conforming implementation shall produce at least one diagnostic message (identified in an implementation-defined manner) if a preprocessing translation unit or translation unit contains a violation of any syntax rule or constraint, even if the behavior is also explicitly specified as undefined or implementation-defined. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c/102821] Tentative definition of variable with internal linkage has incomplete non-array type: missing diagnostics 2021-10-18 20:09 [Bug c/102821] New: Tentative definition of variable with internal linkage has incomplete non-array type: missing diagnostics pavel.morozkin at gmail dot com 2021-10-18 20:39 ` [Bug c/102821] " pinskia at gcc dot gnu.org 2021-10-18 21:51 ` pavel.morozkin at gmail dot com @ 2021-10-18 22:05 ` jsm28 at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: jsm28 at gcc dot gnu.org @ 2021-10-18 22:05 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102821 Joseph S. Myers <jsm28 at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|--- |DUPLICATE Status|NEW |RESOLVED --- Comment #3 from Joseph S. Myers <jsm28 at gcc dot gnu.org> --- This is in a Semantics section of the standard, not Constraints, so no diagnostic is required, but as a quality-of-implementation matter we should diagnose it. *** This bug has been marked as a duplicate of bug 88727 *** ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2021-10-18 22:05 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2021-10-18 20:09 [Bug c/102821] New: Tentative definition of variable with internal linkage has incomplete non-array type: missing diagnostics pavel.morozkin at gmail dot com 2021-10-18 20:39 ` [Bug c/102821] " pinskia at gcc dot gnu.org 2021-10-18 21:51 ` pavel.morozkin at gmail dot com 2021-10-18 22:05 ` jsm28 at gcc dot gnu.org
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