Description:

Clang fails to compile C++11 code including libstdc++ <chrono> where GCC 4.7 works fine.

Additional info:
* clang 3.1
* libstdc++ 4.7.2

Steps to reproduce:

Compile:

#include <chrono>
int main()
{
return 0;
}

With:

$ clang++ -std=c++11 -c test.cpp
In file included from test.cpp:1:
/usr/lib/gcc/i686-pc-linux-gnu/4.7.2/../../../../include/c++/4.7.2/chrono:240:10: error: cannot cast from lvalue of type 'const long long' to rvalue reference type 'rep'
(aka 'long long &&'); types are not compatible
: __r(static_cast<rep>(__rep)) { }
^~~~~~~~~~~~~~~~~~~~~~~

Patch:

A very small patch to libstdc++ is available[1] and this bug had already been reported to LLVM[2] and Debian[3] bug trackers.

[1]: http://clang.llvm.org/libstdc++4.7-clang11.patch
[2]: http://llvm.org/bugs/show_bug.cgi?id=12893
[3]: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=666539