Bug#744792: clang-3.4: unusable with libstdc++ from gcc 4.9

[Ben Longbons]

Package: clang-3.4
Version: 1:3.4-2
Severity: grave
Justification: renders package unusable

Dear Maintainer,

clang 3.4 can't use libstdc++ 4.9's headers, due to changes in
<bits/c++config.h>

The error is:

/usr/bin/../lib/gcc/x86_64-linux-gnu/4.9/../../../../include/c++/4.9/cstddef:51:11: error: no member named 'max_align_t' in the global namespace
  using ::max_align_t;
        ~~^
1 error generated.

$ clang++ -v
Debian clang version 3.4-2 (tags/RELEASE_34/final) (based on LLVM 3.4)
Target: x86_64-pc-linux-gnu
Thread model: posix
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.4
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.4.6
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.4.7
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.6
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.6.4
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.7
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.7.3
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.8
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.8.2
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4.6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4.7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.6.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.7.3
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8.2
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9.0
Selected GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9


-- System Information:
Debian Release: jessie/sid
  APT prefers testing
  APT policy: (600, 'testing'), (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 3.13-1-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 clang-3.4 depends on:
ii  libc6                    2.18-4
ii  libclang-common-3.4-dev  1:3.4-2
ii  libclang1-3.4            1:3.4-2
ii  libffi6                  3.1~rc1+r3.0.13-12
ii  libgcc-4.8-dev           4.8.2-16
ii  libgcc1                  1:4.9-20140322-1
ii  libllvm3.4               1:3.4-2
ii  libobjc-4.8-dev          4.8.2-16
ii  libstdc++-4.8-dev        4.8.2-16
ii  libstdc++6               4.9-20140322-1
ii  libtinfo5                5.9+20140118-1

Versions of packages clang-3.4 recommends:
ii  llvm-3.4-dev  1:3.4-2
ii  python        2.7.5-5

clang-3.4 suggests no packages.

-- no debconf information