For va_list in gcc 4.4+ and glibc system stdarg.h is always required. For gcc 4.4+ including stdio.h
is required because of headers clean up.

Patch by Samuli Suominen <ssuominen@gentoo.org>

diff -ur libassa-3.5.0.orig/assa/Logger_Impl.cpp libassa-3.5.0/assa/Logger_Impl.cpp
--- libassa-3.5.0.orig/assa/Logger_Impl.cpp	2006-07-20 05:30:54.000000000 +0300
+++ libassa-3.5.0/assa/Logger_Impl.cpp	2009-09-04 13:26:26.000000000 +0300
@@ -14,6 +14,7 @@
 
 #include <iostream>
 #include <iomanip>
+#include <stdio.h>				// vsnprintf(3)
 #include <string.h>				// strerror(3)
 
 #include "assa/TimeVal.h"
diff -ur libassa-3.5.0.orig/assa/Logger_Impl.h libassa-3.5.0/assa/Logger_Impl.h
--- libassa-3.5.0.orig/assa/Logger_Impl.h	2006-07-20 05:30:54.000000000 +0300
+++ libassa-3.5.0/assa/Logger_Impl.h	2009-09-04 13:29:45.000000000 +0300
@@ -21,7 +21,7 @@
 #include <sys/varargs.h>		// va_list
 #endif
 
-#if defined (__CYGWIN32__) || defined (__NetBSD__) || defined (WIN32)
+#if defined (__CYGWIN32__) || defined (__NetBSD__) || defined (WIN32) || defined (__GLIBC__)
 # include <stdarg.h>
 #endif