First, this bug is still there in current libc6 from unstable:
[EMAIL PROTECTED]:~> cat t.c
#include <signal.h>
[EMAIL PROTECTED]:~> gcc-2.95 -c -Wall t.c
In file included from /usr/include/asm/sigcontext.h:4,
from /usr/include/bits/sigcontext.h:28,
from /usr/include/signal.h:326,
from t.c:1:
/usr/include/linux/compiler.h:17: warning: `__attribute_used__' redefined
/usr/include/sys/cdefs.h:195: warning: this is the location of the
previous definition
Second, the symbol in question is defined differently in the mentioned
places:
/usr/include/sys/cdefs.h, line 195:
# define __attribute_used__ __attribute__ ((__unused__))
/usr/include/linux/compiler:
...
#if !defined(__KERNEL__)
/* Debian: Most of these are inappropriate for userspace. */
/* We don't define likely, unlikely, or barrier; they're
namespace-intrusive
and should not be needed outside of __KERNEL__. */
# define __attribute_pure__
# define __attribute_used__
# define __deprecated
...
The coment above shows that this point is debian-specific.
Something is broken here.
