The patch below break bootstrap on darwin
(https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63811):
> Fix std::deque move construction with non-equal allocators.
>
> * include/bits/stl_deque.h (_Deque_base::_Deque_base(_Deque_base&&)):
> Dispatch according to whether allocators are always equal.
> (_Deque_base::_M_move_impl()): Implement move-from state.
In file included from
/Users/fx/devel/gcc/ibin2/x86_64-apple-darwin14.0.0/libstdc++-v3/include/deque:64:0,
from
/Users/fx/devel/gcc/trunk2/libstdc++-v3/include/precompiled/stdc++.h:67:
/Users/fx/devel/gcc/ibin2/x86_64-apple-darwin14.0.0/libstdc++-v3/include/bits/stl_deque.h:
In member function ‘std::_Deque_base<_Tp, _Alloc>::_Deque_impl
std::_Deque_base<_Tp, _Alloc>::_M_move_impl()’:
/Users/fx/devel/gcc/ibin2/x86_64-apple-darwin14.0.0/libstdc++-v3/include/bits/stl_deque.h:645:17:
error: expected primary-expression before ‘__attribute’
_Tp_alloc_type __attribute((__unused__)) {std::move(__alloc)};
^
make[2]: *** [x86_64-apple-darwin14.0.0/bits/stdc++.h.gch/O2ggnu++0x.gch] Error
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