[build@fc19jslave09 ~]$ cat t.cpp
#include <type_traits>
class T_base;
template<typename T,
         typename = typename std::enable_if<
           std::is_base_of<T_base, T>::value>::type, typename ...Args>
void f(T const&);

template<typename T, 
         typename = typename std::enable_if<
           std::is_base_of<T_base, T>::value>::type, typename ...Args>
inline void f(T const&)
{
}


[build@fc19jslave09 ~]$ icpc -std=c++0x -c  t.cpp
t.cpp(9): error: redefinition of default argument
           typename = typename std::enable_if<
                    ^

compilation aborted for t.cpp (code 2)
[build@fc19jslave09 ~]$ g++ -std=c++11 -c t.cpp
[build@fc19jslave09 ~]$ g++ --version
g++ (GCC) 4.8.1 20130603 (Red Hat 4.8.1-1)
Copyright (C) 2013 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

[build@fc19jslave09 ~]$ icpc --verison
icpc: command line warning #10006: ignoring unknown option '-fverison'
icpc: command line error: no files specified; for help type "icpc -help"
[build@fc19jslave09 ~]$ icpc --version
icpc (ICC) 14.0.0 20130728
Copyright (C) 1985-2013 Intel Corporation.  All rights reserved.

[build@fc19jslave09 ~]$