Output from running autoreconf:
  configure.ac:429: warning: The macro `AC_LANG_CPLUSPLUS' is obsolete.
  configure.ac:429: You should run autoupdate.
  ./lib/autoconf/c.m4:262: AC_LANG_CPLUSPLUS is expanded from...
  lib/m4sugar/m4sh.m4:692: _AS_IF_ELSE is expanded from...
  lib/m4sugar/m4sh.m4:699: AS_IF is expanded from...
  ./lib/autoconf/general.m4:2249: AC_CACHE_VAL is expanded from...
  ./lib/autoconf/general.m4:2270: AC_CACHE_CHECK is expanded from...
  tools/AC_CXX_NAMESPACES.m4:12: AC_CXX_NAMESPACES is expanded from...
  lib/m4sugar/m4sh.m4:692: _AS_IF_ELSE is expanded from...
  lib/m4sugar/m4sh.m4:699: AS_IF is expanded from...
  ./lib/autoconf/general.m4:2249: AC_CACHE_VAL is expanded from...
  ./lib/autoconf/general.m4:2270: AC_CACHE_CHECK is expanded from...
  tools/AC_CXX_HAVE_STL.m4:20: AC_CXX_HAVE_STL is expanded from...
  configure.ac:429: the top level
  configure.ac:429: warning: The macro `AC_TRY_COMPILE' is obsolete.
  configure.ac:429: You should run autoupdate.
  ./lib/autoconf/general.m4:2847: AC_TRY_COMPILE is expanded from...
  lib/m4sugar/m4sh.m4:692: _AS_IF_ELSE is expanded from...
  lib/m4sugar/m4sh.m4:699: AS_IF is expanded from...
  ./lib/autoconf/general.m4:2249: AC_CACHE_VAL is expanded from...
  ./lib/autoconf/general.m4:2270: AC_CACHE_CHECK is expanded from...
  tools/AC_CXX_NAMESPACES.m4:12: AC_CXX_NAMESPACES is expanded from...
  lib/m4sugar/m4sh.m4:692: _AS_IF_ELSE is expanded from...
  lib/m4sugar/m4sh.m4:699: AS_IF is expanded from...
  ./lib/autoconf/general.m4:2249: AC_CACHE_VAL is expanded from...
  ./lib/autoconf/general.m4:2270: AC_CACHE_CHECK is expanded from...
  tools/AC_CXX_HAVE_STL.m4:20: AC_CXX_HAVE_STL is expanded from...
  configure.ac:429: the top level
  configure.ac:429: warning: The macro `AC_LANG_CPLUSPLUS' is obsolete.
  configure.ac:429: You should run autoupdate.
  ./lib/autoconf/c.m4:262: AC_LANG_CPLUSPLUS is expanded from...
  lib/m4sugar/m4sh.m4:692: _AS_IF_ELSE is expanded from...
  lib/m4sugar/m4sh.m4:699: AS_IF is expanded from...
  ./lib/autoconf/general.m4:2249: AC_CACHE_VAL is expanded from...
  ./lib/autoconf/general.m4:2270: AC_CACHE_CHECK is expanded from...
  tools/AC_CXX_HAVE_STL.m4:20: AC_CXX_HAVE_STL is expanded from...
  configure.ac:429: the top level
  configure.ac:429: warning: The macro `AC_TRY_COMPILE' is obsolete.
  configure.ac:429: You should run autoupdate.
  ./lib/autoconf/general.m4:2847: AC_TRY_COMPILE is expanded from...
  lib/m4sugar/m4sh.m4:692: _AS_IF_ELSE is expanded from...
  lib/m4sugar/m4sh.m4:699: AS_IF is expanded from...
  ./lib/autoconf/general.m4:2249: AC_CACHE_VAL is expanded from...
  ./lib/autoconf/general.m4:2270: AC_CACHE_CHECK is expanded from...
  tools/AC_CXX_HAVE_STL.m4:20: AC_CXX_HAVE_STL is expanded from...
  configure.ac:429: the top level