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-rw-r--r--rbtree.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/rbtree.h b/rbtree.h
index 9597b10..e64dc9a 100644
--- a/rbtree.h
+++ b/rbtree.h
@@ -131,7 +131,10 @@ static inline void rb_set_color(struct rb_node *rb, int color)
#define RB_ROOT (struct rb_root) { NULL, }
+/* Newer gcc versions take care of exporting this */
+#ifndef offsetof
#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
+#endif
#define container_of(ptr, type, member) ({ \
const typeof( ((type *)0)->member ) *__mptr = (ptr); \