X-Git-Url: https://git.lttng.org/?p=urcu.git;a=blobdiff_plain;f=compiler.h;h=99972f30e2ba89726f663c78261f4e9203b6d026;hp=142b9a60fa98c011096a1fba025d962e63b07520;hb=3d7be7ca4e2451381a8fc8a00bd6d7dcbf3b678f;hpb=e72f49371b233637eaf143265a73c7322d0710fd

diff --git a/compiler.h b/compiler.h
index 142b9a6..99972f3 100644
--- a/compiler.h
+++ b/compiler.h
@@ -37,4 +37,14 @@
  */
 #define ACCESS_ONCE(x)	(*(volatile typeof(x) *)&x)
 
+#if (__GNUC__ == 4)
+#define __compiler_offsetof(a, b) __builtin_offsetof(a, b)
+#endif
+
+#ifdef __compiler_offsetof
+#define offsetof(TYPE, MEMBER) __compiler_offsetof(TYPE, MEMBER)
+#else
+#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
+#endif
+
 #endif /* _COMPILER_H */