FreeBSD buildbot failure

[Ivan A. Kosarev]

Hello Alexey,

The FreeBSD 9.2 buildbot fails on the bootstrapping phase:

http://lab.llvm.org:8011/waterfall?show=sanitizer_x86_64-freeBSD9.2

with this:

---

In file included from /home/buildslave/slave_as-bldslv5/sanitizer_x86_64-freeBSD9.2/llvm.src/lib/CodeGen/LexicalScopes.cpp:17:
In file included from /home/buildslave/slave_as-bldslv5/sanitizer_x86_64-freeBSD9.2/llvm.src/include/llvm/CodeGen/LexicalScopes.h:20:
In file included from /home/buildslave/slave_as-bldslv5/sanitizer_x86_64-freeBSD9.2/llvm.src/include/llvm/ADT/ArrayRef.h:14:
In file included from /home/buildslave/slave_as-bldslv5/sanitizer_x86_64-freeBSD9.2/llvm.src/include/llvm/ADT/SmallVector.h:22:
In file included from /usr/include/c++/v1/algorithm:627:
In file included from /usr/include/c++/v1/memory:603:
/usr/include/c++/v1/tuple:320:11: error: rvalue reference to type 'llvm::DIDescriptor' cannot bind to lvalue of type 'llvm::DIDescriptor'
         : value(__t.get())
           ^     ~~~~~~~~~
/usr/include/c++/v1/tuple:444:8: note: in instantiation of member function 'std::__1::__tuple_leaf<1, llvm::DIDescriptor &&, false>::__tuple_leaf' requested here
struct __tuple_impl<__tuple_indices<_Indx...>, _Tp...>
        ^
/home/buildslave/slave_as-bldslv5/sanitizer_x86_64-freeBSD9.2/llvm.src/lib/CodeGen/LexicalScopes.cpp:161:36: note: in instantiation of function template specialization 'std::__1::forward_as_tuple<llvm::LexicalScope *&, llvm::DIDescriptor, nullptr_t, bool>' requested here
                               std::forward_as_tuple(Parent, DIDescriptor(Scope),
                                    ^

---

The problem is that the libcxx version installed on the host seems to be 
too old as adding "-I<build-dir>/projects/libcxx/include" solves the issue.

I thought that since the buildbot scripts prescribe to checkout libcxx 
and libcxxabi, they probably should force the just-build clang to use 
these libs during the bootstrap phase and not the ones installed on the 
host system?

Please let me know what you think.

Thanks.

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