You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
-/* Written by Jim Meyering and Pádraig Brady. */
+/* Written by Jim Meyering, Eric Blake and Pádraig Brady. */
/* Use "ignore_value" to avoid a warning when using a function declared with
gcc's warn_unused_result attribute, but for which you really do want to
# endif
# endif
-static inline void _ignore_value (intptr_t p) { (void) p; }
-# define ignore_value(x) _ignore_value ((intptr_t) x)
+/* The __attribute__((__warn_unused_result__)) feature
+ is available in gcc versions 3.4 and newer,
+ while the typeof feature has been available since 2.7 at least. */
+# if __GNUC__ < 3 || (__GNUC__ == 3 && __GNUC_MINOR__ < 4)
+# define ignore_value(x) ((void) (x))
+# else
+# define ignore_value(x) (({ __typeof__ (x) __x = (x); (void) __x; }))
+# endif
-/* ignore_value works for both scalars and pointers; deprecate ignore_ptr. */
+/* ignore_value works for scalars, pointers and aggregates;
+ deprecate ignore_ptr. */
static inline void ATTRIBUTE_DEPRECATED
ignore_ptr (void *p) { (void) p; } /* deprecated: use ignore_value */
-/* FIXME: what about aggregate types? */
-
#endif