re PR libffi/65726 (libffi fails to build when not bootstrapping: configure: error: C++ preprocessor "/lib/cpp" fails sanity check)

2015-12-01  Andreas Tobler  <andreast@gcc.gnu.org>

    PR libffi/65726
    * Makefile.def (lang_env_dependencies): Make libffi depend
    on cxx.
    * Makefile.in: Regenerate.

From-SVN: r231128