diff --git a/ftk/src/ftk.h b/ftk/src/ftk.h
index ea18328..6a1d9c6 100644
--- a/ftk/src/ftk.h
+++ b/ftk/src/ftk.h
@@ -190,6 +190,8 @@
 			typedef signed char						FLMINT8;
 			#if defined( FLM_GNUC)
 				typedef __builtin_va_list			f_va_list;
+			#elif defined( FLM_SOLARIS)
+				typedef void *							f_va_list;
 			#else
 				typedef char *							f_va_list;
 			#endif
@@ -368,15 +370,27 @@
 			(*(type *)(((ap) += f_argsize(type)) - (f_argsize(type))))
 			
 		#define f_va_end(ap) ((void)0)
+	#elif defined( FLM_SOLARIS)
+		void * f_va_arg_next( 
+			f_va_list *	pList);
+
+		#define f_va_start( list, name) \
+			((void)((list) = (f_va_list)&__builtin_va_alist))
+
+		#define f_va_arg( list, type) \
+			(*((type *)f_va_arg_next( &list))) 
+
+		#define f_va_end( list) \
+			(void)(list)
 	#else
 		#define f_va_start( list, name) \
-			(list = (f_va_list)&(name) + f_alignedsize( name))
+			((list) = (f_va_list)&(name) + f_alignedsize( name))
 			
 		#define f_va_arg( list, type) \
 			(*(type *)((list += f_alignedsize( type)) - f_alignedsize( type)))
 			
 		#define f_va_end( list) \
-			(list = (f_va_list)0)
+			((list) = (f_va_list)0)
 	#endif
 
 	// flmnovtbl keeps MS compilers from generating vtables for interfaces
diff --git a/ftk/src/ftkmisc.cpp b/ftk/src/ftkmisc.cpp
index fab769b..fc38267 100644
--- a/ftk/src/ftkmisc.cpp
+++ b/ftk/src/ftkmisc.cpp
@@ -100,6 +100,9 @@ RCODE FLMAPI ftkStartup( void)
 	}
 	
 	f_memoryInit();
+
+
+	f_assert( sizeof( f_va_list) == sizeof( va_list));
 	
 	if( RC_BAD( rc = f_initCharMappingTables()))
 	{
diff --git a/ftk/src/ftkunix.cpp b/ftk/src/ftkunix.cpp
index d6c1cdc..f51d297 100644
--- a/ftk/src/ftkunix.cpp
+++ b/ftk/src/ftkunix.cpp
@@ -1579,6 +1579,17 @@ FLMINT32 posix_atomic_xchg_32(
 	return( i32RetVal);
 }
 
+/**********************************************************************
+Desc:
+**********************************************************************/
+#if defined( FLM_SOLARIS) && !defined( FLM_GNUC)
+void * f_va_arg_next(
+	f_va_list *					pList)		
+{
+	return( __builtin_va_arg_incr( *pList, NULL));
+}
+#endif
+
 #endif // FLM_UNIX
 
 #if defined( FLM_WATCOM_NLM)
diff --git a/ftk/util/ftktest.cpp b/ftk/util/ftktest.cpp
index 3fa52ca..fddac61 100644
--- a/ftk/util/ftktest.cpp
+++ b/ftk/util/ftktest.cpp
@@ -35,6 +35,7 @@ int main( void)
 	IF_BlockMgr *		pBlockMgr = NULL;
 	IF_BTree *			pBTree = NULL;
 	FLMUINT32			ui32RootBlkId;
+	char					szTmpBuf[ 128];
 	
 	if( RC_BAD( rc = ftkStartup()))
 	{
@@ -76,6 +77,9 @@ int main( void)
 	
 	pBTree->btDeleteTree();
 	pBTree->Release();
+
+	f_sprintf( szTmpBuf, "Hello, World! (You're number %u)\n", 1);
+	f_printf( szTmpBuf);
 	
 Exit: