Output from running autoreconf:
  configure.ac:8: warning: The macro `AC_CONFIG_HEADER' is obsolete.
  configure.ac:8: You should run autoupdate.
  ./lib/autoconf/status.m4:719: AC_CONFIG_HEADER is expanded from...
  configure.ac:8: the top level
  configure.ac:9: warning: The macro `AC_CONFIG_HEADER' is obsolete.
  configure.ac:9: You should run autoupdate.
  ./lib/autoconf/status.m4:719: AC_CONFIG_HEADER is expanded from...
  configure.ac:9: the top level
  configure.ac:10: warning: The macro `AC_CONFIG_HEADER' is obsolete.
  configure.ac:10: You should run autoupdate.
  ./lib/autoconf/status.m4:719: AC_CONFIG_HEADER is expanded from...
  configure.ac:10: the top level
  configure.ac:11: warning: The macro `AC_CONFIG_HEADER' is obsolete.
  configure.ac:11: You should run autoupdate.
  ./lib/autoconf/status.m4:719: AC_CONFIG_HEADER is expanded from...
  configure.ac:11: the top level
  configure.ac:12: warning: The macro `AC_CONFIG_HEADER' is obsolete.
  configure.ac:12: You should run autoupdate.
  ./lib/autoconf/status.m4:719: AC_CONFIG_HEADER is expanded from...
  configure.ac:12: the top level
  configure.ac:13: warning: The macro `AC_CONFIG_HEADER' is obsolete.
  configure.ac:13: You should run autoupdate.
  ./lib/autoconf/status.m4:719: AC_CONFIG_HEADER is expanded from...
  configure.ac:13: the top level
  configure.ac:76: warning: The macro `AC_PROG_CC_C99' is obsolete.
  configure.ac:76: You should run autoupdate.
  ./lib/autoconf/c.m4:1659: AC_PROG_CC_C99 is expanded from...
  configure.ac:76: the top level
  configure.ac:133: warning: $as_echo is obsolete; use AS_ECHO(["message"]) instead
  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/m4/ax_pthread.m4:88: AX_PTHREAD is expanded from...
  configure.ac:133: the top level
  configure.ac:163: warning: The macro `AC_TRY_RUN' is obsolete.
  configure.ac:163: You should run autoupdate.
  ./lib/autoconf/general.m4:2997: AC_TRY_RUN 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/m4/ax_func_posix_memalign.m4:27: AX_FUNC_POSIX_MEMALIGN is expanded from...
  configure.ac:163: the top level
  configure.ac:167: warning: The macro `AC_LANG_CPLUSPLUS' is obsolete.
  configure.ac:167: 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/m4/ax_cxx_namespace_std.m4:26: AX_CXX_NAMESPACE_STD 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/m4/ax_snprintf_in_namespace_std.m4:21: AX_CXX_SNPRINTF_IN_NAMESPACE_STD is expanded from...
  configure.ac:167: the top level
  configure.ac:167: warning: The macro `AC_TRY_COMPILE' is obsolete.
  configure.ac:167: 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/m4/ax_cxx_namespace_std.m4:26: AX_CXX_NAMESPACE_STD 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/m4/ax_snprintf_in_namespace_std.m4:21: AX_CXX_SNPRINTF_IN_NAMESPACE_STD is expanded from...
  configure.ac:167: the top level