Bug#666539: clang: Fails when trying to include chrono from C++11

[Mario Lang]

Package: clang
Version: 3.0-6
Severity: normal

Dear Maintainer,

clang fails to include chrono from C++11.

Here is a minimal example program:

---<snip>---
#include <chrono>
int main() { }
---<snip>---

Building with GCC (4.6 and 4.7) works fine:

x4:/tmp% g++-4.6 -std=c++0x -o clang-chrono clang-chrono.cxx
x4:/tmp% g++-4.7 -std=c++0x -o clang-chrono clang-chrono.cxx

However, building with clang fails:

x4:/tmp% clang++ -std=c++0x -o clang-chrono clang-chrono.cxx
In file included from clang-chrono.cxx:1:
/usr/include/c++/4.6/chrono:666:7: error: static_assert expression is not an integral constant expression
      static_assert(system_clock::duration::min()
      ^             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
zsh: exit 1     clang++ -std=c++0x -o clang-chrono clang-chrono.cxx

The same error happens with chrono from c++/4.7/.

I realize that this might be a libstdc++ bug.  However, gcc does not
trigger it, only clang seems to be strict enough (or broken enough? to
actually trigger it.  In any case, C++11 chrono is a no go on clang
right now :(.

-- 
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