-static inline void ignore_value (int i) { (void) i; }
-static inline void ignore_ptr (void* p) { (void) p; }
-/* FIXME: what about aggregate types? */
+#ifndef _GL_IGNORE_VALUE_H
+#define _GL_IGNORE_VALUE_H
+
+/* 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 3 < __GNUC__ + (4 <= __GNUC_MINOR__)
+# define ignore_value(x) \
+ (__extension__ ({ __typeof__ (x) __x = (x); (void) __x; }))
+#else
+# define ignore_value(x) ((void) (x))
+#endif
+
+#endif