[cfe-dev] Problem with gnu libc++ 4.7's chrono in Clang 3.2

[Martin Martin]

Hi,

Compiling the following 1-line file:

#include <condition_variable>

Causes the error:

$ clang++ -std=c++11 ./foo.cpp
In file included from ./foo.cpp:1:
In file included from
/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../include/c++/4.7/condition_variable:37:
/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../include/c++/4.7/chrono:539:6:
error: no matching constructor for
      initialization of 'duration' (aka 'std::chrono::duration<long,
std::ratio<1, 1000000> >')
          : __d(__t.time_since_epoch())
            ^   ~~~~~~~~~~~~~~~~~~~~~~
/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../include/c++/4.7/condition_variable:110:42:
note: in instantiation of
      function template specialization
'std::chrono::time_point<std::chrono::system_clock,
std::chrono::duration<long,
      std::ratio<1, 1000000> > >::time_point<std::chrono::duration<long,
std::ratio<1, 1000000000> > >' requested here
        const __clock_t::time_point __s_atime = __s_entry + __delta;
                                                ^
/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../include/c++/4.7/chrono:233:12:
note: candidate constructor not viable: no
      known conversion from 'duration<[...], ratio<[...], 1000000000>>' to
'duration<[...], ratio<[...], 1000000>>'
      for 1st argument
        constexpr duration(const duration&) = default;
                  ^
/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../include/c++/4.7/chrono:239:23:
note: candidate template ignored: couldn't
      infer template argument ''
          constexpr explicit duration(const _Rep2& __rep)
                             ^
/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../include/c++/4.7/chrono:246:14:
note: candidate template ignored: couldn't
      infer template argument ''
          constexpr duration(const duration<_Rep2, _Period2>& __d)
                    ^
/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../include/c++/4.7/chrono:231:12:
note: candidate constructor not viable:
      requires 0 arguments, but 1 was provided
        constexpr duration() : __r() { }
                  ^
1 error generated.

Searching the web doesn't turn up anything related.

This is on Ubuntu 12.10, with Clang branches/release_32 compiled from
source in release mode.

Any idea what I should look at next?

Thanks,
Martin
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