1 files changed, 10 insertions, 1 deletions

diff --git a/src/lib/libc/include/namespace.h b/src/lib/libc/include/namespace.h
index c8c864a266..cfdb95ad02 100644
--- a/src/lib/libc/include/namespace.h
+++ b/src/lib/libc/include/namespace.h
@@ -1,4 +1,4 @@
-/*      $OpenBSD: namespace.h,v 1.6 2015/09/10 18:13:46 guenther Exp $  */
+/*      $OpenBSD: namespace.h,v 1.7 2015/09/11 09:18:27 guenther Exp $  */
 
 #ifndef _LIBC_NAMESPACE_H_
 #define _LIBC_NAMESPACE_H_
@@ -124,6 +124,12 @@
  *      only be needed for syscalls that have C instead of asm stubs.
  *      Matches with PROTO_NORMAL(), PROTO_CANCEL(), or PROTO_WRAP()
  *      ex: DEF_SYS(pread)
+ *
+ *   MAKE_CLONE(dst, src)       Symbols that are exact clones of other symbols
+ *      This declares _libc_dst as being the same type as dst, and makes
+ *      _libc_dst a strong, hidden alias for _libc_src.  You still need to
+ *      DEF_STRONG(dst) or DEF_WEAK(dst) to alias dst itself
+ *      ex: MAKE_CLONE(SHA224Pad, SHA256Pad)
  */
 
 #include <sys/cdefs.h>  /* for __dso_hidden and __{weak,strong}_alias */
@@ -146,6 +152,9 @@
 #define DEF_WRAP(x)             __weak_alias(x, WRAP(x))
 #define DEF_SYS(x)              __strong_alias(_thread_sys_##x, HIDDEN(x))
 
+#define MAKE_CLONE(dst, src)    __dso_hidden typeof(dst) HIDDEN(dst) \
+                                __attribute__((alias (HIDDEN_STRING(src))))
+
 
 /*
  * gcc will generate calls to the functions below.