Useful macro

diff --git a/src/include/build.h b/src/include/build.h
index 1934023..a006d01 100644 (file)
--- a/src/include/build.h
+++ b/src/include/build.h
@@ -37,6 +37,11 @@ extern "C" {
 #endif
 
 /*
+ *     struct field size
+ */
+#define SIZEOF_MEMBER(_t, _m) sizeof(((_t *)0)->_m)
+
+/*
  *     Only use GCC __attribute__ if were building with a GCClike
  *     compiler.
  */