I have found that the attributes are ignored when using any include from glibc (stdlib, stdio...). compiling with -E shows that the attributed are deleted.

The problem is actually that sys/cdefs.h (included by features.h which is included by almost all the other headers) have this code:


```
/* GCC has various useful declarations that can be made with the
   `__attribute__' syntax.  All of the ways we use this do fine if
   they are omitted for compilers that don't understand it. */
#if !defined _GNUC_ || _GNUC_ < 2
# define _attribute_(xyz) /* Ignore */
#endif
```

Which eliminates any attribute declaration on preprocessing.

Do you have a workaround or solution for this??