[Bug c++/13527] New: __attribute__ ((unused)) ignored

[Bug c++/13527] New: __attribute__ ((unused)) ignored

[robin at robindaugherty dot net]

In a number of seperate files, the ((unused)) attribute went ignored, causing
warnings for these lines:

static char bugs_doc[] __attribute__ ((unused)) = "Robin Daugherty";
static char version[] __attribute__ ((unused)) = "hsmdr 1.0 (2003-APR-29)";

But only if the mysql header files are included first:

// MySQL client headers
#include <mysql/my_global.h>
#include <mysql/my_sys.h>
#include <mysql/m_string.h>
#include <mysql/mysql.h>
#include <mysql/mysql_embed.h>
#include <mysql/errmsg.h>
#include <mysql/my_getopt.h>

Moving this block before the two declarations causes warnings to be issued:

hsmdr.cpp:48: warning: `char bugs_doc[16]' defined but not used
hsmdr.cpp:49: warning: `char version[24]' defined but not used

But these warnings are gone if the declaration is first.

-- 
           Summary: __attribute__ ((unused)) ignored
           Product: gcc
           Version: 3.3.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: robin at robindaugherty dot net
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13527

[Bug c++/13527] __attribute__ ((unused)) ignored

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2003-12-30 22:54 -------
Can you provide the preprocessed source file after reading http://gcc.gnu.org/bugs.html.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13527

[Bug c++/13527] __attribute__ ((unused)) ignored

[robin at robindaugherty dot net]

------- Additional Comments From robin at robindaugherty dot net  2003-12-31 15:10 -------
I have observed this with 3.2.1 and 3.3.2 (made with default options for x86 on
Linux).  I compile these files with -Wall (I use this option in my Makefiles).

I have attached two files, one which causes five warnings, and one which causes
only three.  The difference between them is that #include <mysql/my_global.h> is
before the definitions in the first file, but after them in the second.

Let me know if you still want preprocessed sources from me.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13527

[Bug c++/13527] __attribute__ ((unused)) ignored

[falk at debian dot org]

------- Additional Comments From falk at debian dot org  2003-12-31 15:41 -------
#if !defined(__attribute__) && (defined(__cplusplus) || !defined(__GNUC__)  ||
__GNUC__ == 2 && __GNUC_MINOR__ < 8)
#define __attribute__(A)
#endif

There's the cuplrit. Complain to whoever provided this header file.


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |RESOLVED
         Resolution|                            |INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13527

[Bug c++/13527] __attribute__ ((unused)) ignored

[Jeremy at Zawodny dot com]

------- Additional Comments From Jeremy at Zawodny dot com  2004-02-17 23:03 -------
I made sure this got into MySQL AB's bug tracking system:

http://bugs.mysql.com/bug.php?id=2717

Jeremy

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13527