[Bug c/34985] New: Warning "defined but not used" despite __attribute__((__used__))

["sam at ravnborg dot org" <gcc-bugzilla at gcc dot gnu dot org>]

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