gentoo-overlay/app-misc/screen/files/screen-4.0.1-vsprintf.patch

--- screen-4.0.1/configure.in	2003-06-03 07:58:24.000000000 -0400
+++ screen-4.0.1/configure.in.agriffis	2004-01-13 12:07:37.000000000 -0500
@@ -1206,7 +1206,9 @@
 rm -f /tmp/conftest*
 
 AC_MSG_CHECKING(for vsprintf)
-AC_TRY_LINK(,[vsprintf(0,0,0);], AC_MSG_RESULT(yes);AC_DEFINE(USEVARARGS), AC_MSG_RESULT(no))
+AC_TRY_LINK([#include <stdarg.h>],[va_list valist; vsprintf(0,0,valist);],
+	[AC_MSG_RESULT(yes);AC_DEFINE(USEVARARGS)],
+	[AC_MSG_RESULT(no)])
 
 AC_HEADER_DIRENT