+AX_CHECK_SOCK_CLOEXEC([AC_DEFINE([HAVE_SOCK_CLOEXEC], [1], [Check for SOCK_CLOEXEC.])],
+ [AC_DEFINE([HAVE_SOCK_CLOEXEC], [0], [Check for SOCK_CLOEXEC.])])
+
+AX_PTHREAD(, [AC_MSG_ERROR(could not find libpthread)])
+
+AX_HARDEN_COMPILER_FLAGS
+
+AX_DEBUG