[NaCl SDK] Add nacl_mounts to NaCl SDK build. Experimental for now.

native_client_sdk/src/libraries/utils/macros.h

Index: native_client_sdk/src/libraries/utils/macros.h
diff --git a/native_client_sdk/src/libraries/utils/macros.h b/native_client_sdk/src/libraries/utils/macros.h
index 40f56848acea3074e5544ded492b52b5f3bbcd44..97602b3538ebc1b02dee1a6be584afe295d4f80d 100644
--- a/native_client_sdk/src/libraries/utils/macros.h
+++ b/native_client_sdk/src/libraries/utils/macros.h
@@ -6,18 +6,20 @@
 #define LIBRARIES_UTILS_MACROS_H_
 
 /**
-* A macro to disallow the evil copy constructor and operator= functions
-* This should be used in the private: declarations for a class.
-*/
+ * A macro to disallow the evil copy constructor and operator= functions
+ * This should be used in the private: declarations for a class.
+ */
 #define DISALLOW_COPY_AND_ASSIGN(TypeName)      \
   TypeName(const TypeName&);                    \
   void operator=(const TypeName&)
 
+/** returns the size of a member of a struct. */
+#define MEMBER_SIZE(struct_name, member) sizeof(((struct_name*)0)->member)
 
 /**
-* Macros to prevent name mangling of defnitions, allowing them to be
-* referenced from C.
-*/
+ * Macros to prevent name mangling of defnitions, allowing them to be
+ * referenced from C.
+ */
 #ifdef __cplusplus
 # define EXTERN_C_BEGIN  extern "C" {
 # define EXTERN_C_END    }