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* [Bug c/34985] New: Warning "defined but not used" despite __attribute__((__used__)) @ 2008-01-26 20:07 sam at ravnborg dot org 2008-01-26 20:48 ` [Bug c/34985] " rguenth at gcc dot gnu dot org ` (4 more replies) 0 siblings, 5 replies; 6+ messages in thread From: sam at ravnborg dot org @ 2008-01-26 20:07 UTC (permalink / raw) To: gcc-bugs [-- Warning: decoded text below may be mangled, UTF-8 assumed --] [-- Attachment #1: Type: text/plain, Size: 1109 bytes --] Exact gcc version (Fedora 8): gcc (GCC) 4.1.2 20070925 (Red Hat 4.1.2-33) Following small code snippet: static void remove_one(void); static void __attribute__((__used__)) remove_one(void) { } build with: gcc -c -Wall test.c produces following warning: test.c:4: warning: remove_one defined but not used Removing the forward declaration (prototye) or adding the attribute to the forward declaration make the warning disappear. I had expected the attribution on the function to take precedence over the forward declaration. Browsing the gcc manual did not reveal an answer and searching the web / the bug database did not bring up an answer so I decided to report it as a bug. /Sam -- Summary: Warning "defined but not used" despite __attribute__((__used__)) Product: gcc Version: 4.1.2 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: sam at ravnborg dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34985 ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c/34985] Warning "defined but not used" despite __attribute__((__used__)) 2008-01-26 20:07 [Bug c/34985] New: Warning "defined but not used" despite __attribute__((__used__)) sam at ravnborg dot org @ 2008-01-26 20:48 ` rguenth at gcc dot gnu dot org 2008-02-02 12:53 ` manu at gcc dot gnu dot org ` (3 subsequent siblings) 4 siblings, 0 replies; 6+ messages in thread From: rguenth at gcc dot gnu dot org @ 2008-01-26 20:48 UTC (permalink / raw) To: gcc-bugs ------- Comment #1 from rguenth at gcc dot gnu dot org 2008-01-26 20:09 ------- Confirmed. Not a regression. -- rguenth at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Severity|normal |enhancement Status|UNCONFIRMED |NEW Ever Confirmed|0 |1 Keywords| |diagnostic Known to fail| |4.3.0 Last reconfirmed|0000-00-00 00:00:00 |2008-01-26 20:09:33 date| | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34985 ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c/34985] Warning "defined but not used" despite __attribute__((__used__)) 2008-01-26 20:07 [Bug c/34985] New: Warning "defined but not used" despite __attribute__((__used__)) sam at ravnborg dot org 2008-01-26 20:48 ` [Bug c/34985] " rguenth at gcc dot gnu dot org @ 2008-02-02 12:53 ` manu at gcc dot gnu dot org 2008-07-29 10:02 ` manu at gcc dot gnu dot org ` (2 subsequent siblings) 4 siblings, 0 replies; 6+ messages in thread From: manu at gcc dot gnu dot org @ 2008-02-02 12:53 UTC (permalink / raw) To: gcc-bugs ------- Comment #2 from manu at gcc dot gnu dot org 2008-02-02 12:52 ------- Patch here: http://gcc.gnu.org/ml/gcc-patches/2008-02/msg00044.html I miss the patch tracker :( -- manu at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |manu at gcc dot gnu dot org OtherBugsDependingO| |33702 nThis| | AssignedTo|unassigned at gcc dot gnu |manu at gcc dot gnu dot org |dot org | Status|NEW |ASSIGNED Keywords| |patch Last reconfirmed|2008-01-26 20:09:33 |2008-02-02 12:52:41 date| | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34985 ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c/34985] Warning "defined but not used" despite __attribute__((__used__)) 2008-01-26 20:07 [Bug c/34985] New: Warning "defined but not used" despite __attribute__((__used__)) sam at ravnborg dot org 2008-01-26 20:48 ` [Bug c/34985] " rguenth at gcc dot gnu dot org 2008-02-02 12:53 ` manu at gcc dot gnu dot org @ 2008-07-29 10:02 ` manu at gcc dot gnu dot org 2008-07-29 10:09 ` manu at gcc dot gnu dot org 2008-12-29 14:50 ` pinskia at gcc dot gnu dot org 4 siblings, 0 replies; 6+ messages in thread From: manu at gcc dot gnu dot org @ 2008-07-29 10:02 UTC (permalink / raw) To: gcc-bugs ------- Comment #3 from manu at gcc dot gnu dot org 2008-07-29 10:01 ------- Subject: Bug 34985 Author: manu Date: Tue Jul 29 10:00:25 2008 New Revision: 138235 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=138235 Log: 2008-07-29 Manuel Lopez-Ibanez <manu@gcc.gnu.org> PR 34985 * c-decl.c (merge_decls): Merge USED flags. cp/ * decl.c (duplicate_decls): Merge USED flags. testsuite/ * gcc.dg/pr34985.c: New. * g++.dg/warn/pr34985.C: New. Added: trunk/gcc/testsuite/g++.dg/warn/pr34985.C trunk/gcc/testsuite/gcc.dg/pr34985.c Modified: trunk/gcc/ChangeLog trunk/gcc/c-decl.c trunk/gcc/cp/ChangeLog trunk/gcc/cp/decl.c trunk/gcc/testsuite/ChangeLog -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34985 ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c/34985] Warning "defined but not used" despite __attribute__((__used__)) 2008-01-26 20:07 [Bug c/34985] New: Warning "defined but not used" despite __attribute__((__used__)) sam at ravnborg dot org ` (2 preceding siblings ...) 2008-07-29 10:02 ` manu at gcc dot gnu dot org @ 2008-07-29 10:09 ` manu at gcc dot gnu dot org 2008-12-29 14:50 ` pinskia at gcc dot gnu dot org 4 siblings, 0 replies; 6+ messages in thread From: manu at gcc dot gnu dot org @ 2008-07-29 10:09 UTC (permalink / raw) To: gcc-bugs ------- Comment #4 from manu at gcc dot gnu dot org 2008-07-29 10:08 ------- Fixed in GCC 4.4 -- manu at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution| |FIXED http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34985 ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c/34985] Warning "defined but not used" despite __attribute__((__used__)) 2008-01-26 20:07 [Bug c/34985] New: Warning "defined but not used" despite __attribute__((__used__)) sam at ravnborg dot org ` (3 preceding siblings ...) 2008-07-29 10:09 ` manu at gcc dot gnu dot org @ 2008-12-29 14:50 ` pinskia at gcc dot gnu dot org 4 siblings, 0 replies; 6+ messages in thread From: pinskia at gcc dot gnu dot org @ 2008-12-29 14:50 UTC (permalink / raw) To: gcc-bugs -- pinskia at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Target Milestone|--- |4.4.0 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34985 ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2008-12-29 14:50 UTC | newest] Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2008-01-26 20:07 [Bug c/34985] New: Warning "defined but not used" despite __attribute__((__used__)) sam at ravnborg dot org 2008-01-26 20:48 ` [Bug c/34985] " rguenth at gcc dot gnu dot org 2008-02-02 12:53 ` manu at gcc dot gnu dot org 2008-07-29 10:02 ` manu at gcc dot gnu dot org 2008-07-29 10:09 ` manu at gcc dot gnu dot org 2008-12-29 14:50 ` pinskia at gcc dot gnu dot org
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