--- a/packages/infra/current/ChangeLog
+++ b/packages/infra/current/ChangeLog
@@ -1,3 +1,9 @@
+2005-06-27  Andrew Lunn  <andrew.lunn@ascom.ch>
+
+	* include/cyg_type.h: Added CYGBLD_ATTRIB_USED so that we can
+	indicate to gcc 3.4.4 or above not to throw away a variable or
+	function even when it appears to be not references.
+	
 2005-03-27  Andrew Lunn  <andrew.lunn@ascom.ch>
 
 	* include/diag.h: Added CYGBLD_ATTRIB_PRINTF_FORMAT where

--- a/packages/infra/current/include/cyg_type.h
+++ b/packages/infra/current/include/cyg_type.h
@@ -313,6 +313,15 @@ typedef cyg_haladdrword CYG_ADDRWORD;
 // COMPILER-SPECIFIC STUFF
 
 #ifdef __GNUC__
+#if defined(__GNU_PATCHLEVEL__)
+# define __GNUC_VERSION__ (__GNUC__ * 10000 \
+                            + __GNUC_MINOR__ * 100 \
+                            + __GNUC_PATCHLEVEL__)
+#else
+# define __GNUC_VERSION__ (__GNUC__ * 10000 \
+                            + __GNUC_MINOR__ * 100)
+#endif
+
 // Force a 'C' routine to be called like a 'C++' contructor
 # if !defined(CYGBLD_ATTRIB_CONSTRUCTOR)
 #  define CYGBLD_ATTRIB_CONSTRUCTOR __attribute__((constructor))
@@ -383,6 +392,16 @@ typedef cyg_haladdrword CYG_ADDRWORD;
 # define CYGBLD_ATTRIB_STRFTIME_FORMAT(__format__, __args__) \
         __attribute__((format (strftime, __format__, __args__)))
 
+// Tell the compiler not to throw away a variable or function. Only
+// available on 3.3.4 or above. Old version's didn't throw them away,
+// but using the unused attribute should stop warnings.
+# if !defined(CYGBLD_ATTRIB_USED)
+#  if __GNUC_VERSION__ >= 30404
+#   define CYGBLD_ATTRIB_USED __attribute__((used))
+#  else
+#   define CYGBLD_ATTRIB_USED __attribute__((unused))
+#  endif
+# endif 
 #else // non-GNU
 
 # define CYGBLD_ATTRIB_CONSTRUCTOR