Index: gcc-4.2/include/ansidecl.h
===================================================================
--- gcc-4.2/include/ansidecl.h	(revision 109894)
+++ gcc-4.2/include/ansidecl.h	(working copy)
@@ -165,7 +165,7 @@
 #define VA_OPEN(AP, VAR)	{ va_list AP; va_start(AP, VAR); { struct Qdmy
 #define VA_CLOSE(AP)		} va_end(AP); }
 #define VA_FIXEDARG(AP, T, N)	struct Qdmy
- 
+
 #undef const
 #undef volatile
 #undef signed
@@ -352,7 +352,6 @@
 # endif /* GNUC >= 3.5 */
 #endif /* ATTRIBUTE_SENTINEL */
 
-
 #ifndef ATTRIBUTE_ALIGNED_ALIGNOF
 # if (GCC_VERSION >= 3000)
 #  define ATTRIBUTE_ALIGNED_ALIGNOF(m) __attribute__ ((__aligned__ (__alignof__ (m))))
@@ -361,6 +360,16 @@
 # endif /* GNUC >= 3.0 */
 #endif /* ATTRIBUTE_ALIGNED_ALIGNOF */
 
+/* Attribute `externally_visible' was usable as of gcc 4.2.  */
+#ifndef ATTRIBUTE_EXTERNALLY_VISIBLE
+# if (GCC_VERSION >= 4002)
+#  define ATTRIBUTE_EXTERNALLY_VISIBLE __attribute__ ((__externally_visible__))
+# else
+#  define ATTRIBUTE_EXTERNALLY_VISIBLE
+# endif /* GNUC >= 4.2 */
+#endif /* ATTRIBUTE_EXTERNALLY_VISIBLE */
+
+
 /* We use __extension__ in some places to suppress -pedantic warnings
    about GCC extensions.  This feature didn't work properly before
    gcc 2.8.  */