(_GLIBCXX_WEAK_DEFINITION): Define.
	* include/bits/c++config (_GLIBCXX_WEAK_DEFINITION): Define.
	* libsupc++/del_op.cc (operator delete(void *)): Use
	_GLIBCXX_WEAK_DEFINITION.
	* libsupc++/del_opnt.cc
	(operator delete(void *, const std::nothrow_t&)): Same.
	* libsupc++/del_opv.cc (operator delete[](void *)): Same.
	* libsupc++/del_opvnt.cc
	(operator delete[](void *, const std::nothrow_t&)): Same.
	* libsupc++/new_op.cc (operator new(std::size_t)): Same.
	* libsupc++/new_opnt.cc
	(operator new(std::size_t, const std::nothrow_t&)): Same
	* libsupc++/new_opv.cc (operator new[](std::size_t)): Same.
	* libsupc++/new_opvnt.cc
	(operator new[](std::size_t, const std::nothrow_t&)): Same.

From-SVN: r90017