Determine the name of the produced target from the
        names of the sources.

def determine_output_name(self, sources):
        """Determine the name of the produced target from the
        names of the sources."""
        assert is_iterable_typed(sources, virtual_target.VirtualTarget)

        # The simple case if when a name
        # of source has single dot. Then, we take the part before
        # dot. Several dots can be caused by:
        # - Using source file like a.host.cpp
        # - A type which suffix has a dot. Say, we can
        #   type 'host_cpp' with extension 'host.cpp'.
        # In the first case, we want to take the part till the last
        # dot. In the second case -- no sure, but for now take
        # the part till the last dot too.
        name = os.path.splitext(sources[0].name())[0]

        for s in sources[1:]:
            n2 = os.path.splitext(s.name())
            if n2 != name:
                get_manager().errors()(
                    "%s: source targets have different names: cannot determine target name"
                    % (self.id_))

        # Names of sources might include directory. We should strip it.
        return self.determine_target_name(sources[0].name())