Bug#715003: g++-4.7: missing symbol: std::chrono::steady_clock::now()

[Tilman Keskinoz <arved+debian@arved.at>]

Package: g++-4.7
Version: 4.7.3-4
Severity: normal

Dear Maintainer,

$ cat ~/main.cc
#include <chrono>
#include <iostream>

int main() {
        auto start = std::chrono::steady_clock::now();
        std::cout << "Hello World\n";
        auto end = std::chrono::steady_clock::now();
        std::cout << "Printing took "
              // duration_cast is required to avoid accidentally losing precision.
              << std::chrono::duration_cast<std::chrono::microseconds>(end - start).count()
              << "us.\n";
}

$ g++ -std=gnu++11 main.cc
/tmp/cc0oJ2e2.o: In function `main':
main.cc:(.text+0xa): undefined reference to `std::chrono::steady_clock::now()'

This program used to compile until around ca. a month ago.

It compiles fine with g++-4.8
It compiles fine on an Ubuntu 13.04 with g++-4.7

-- System Information:
Debian Release: jessie/sid
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.9-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages g++-4.7 depends on:
ii  gcc-4.7             4.7.3-4
ii  gcc-4.7-base        4.7.3-4
ii  libc6               2.17-6
ii  libcloog-ppl1       0.16.1-3
ii  libgmp10            2:5.1.2+dfsg-1
ii  libgmpxx4ldbl       2:5.1.2+dfsg-1
ii  libmpc3             1.0.1-1
ii  libmpfr4            3.1.1-1
ii  libppl-c4           1:1.0-7
ii  libppl12            1:1.0-7
ii  libstdc++6-4.7-dev  4.7.3-4
ii  zlib1g              1:1.2.8.dfsg-1

g++-4.7 recommends no packages.

Versions of packages g++-4.7 suggests:
pn  g++-4.7-multilib    <none>
pn  gcc-4.7-doc         <none>
pn  libstdc++6-4.7-dbg  <none>

-- no debconf information