From 5882811b88767f26c75913ca2b2fffd05595a7b5 Mon Sep 17 00:00:00 2001
From: David McCullough <davidm@snapgear.com>
Date: Wed, 11 Jul 2001 13:33:21 +0000
Subject: The main part of the C++ support is the definition of __BEGIN_DECLS
 and __END_DECLS in this file based on the __cplusplus define.

---
 include/sys/cdefs.h | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

(limited to 'include/sys')

diff --git a/include/sys/cdefs.h b/include/sys/cdefs.h
index 877746e47..7df9f1e52 100644
--- a/include/sys/cdefs.h
+++ b/include/sys/cdefs.h
@@ -20,9 +20,14 @@
 
 #endif
 
-/* No C++ */
-#define __BEGIN_DECLS
-#define __END_DECLS
+/* C++ needs to know that types and declarations are C, not C++.  */
+#ifdef  __cplusplus
+# define __BEGIN_DECLS  extern "C" {
+# define __END_DECLS    }
+#else
+# define __BEGIN_DECLS
+# define __END_DECLS
+#endif
 
 /* GNUish things */
 #define __CONSTVALUE
-- 
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