Update Tor to use Libevent 2.0 APIs when available.

This patch adds a new compat_libevent.[ch] set of files, and moves our
Libevent compatibility and utilitity functions there.  We build them
into a separate .a so that nothing else in src/commmon depends on
Libevent (partially fixing bug 507).

Also, do not use our own built-in evdns copy when we have Libevent
2.0, whose evdns is finally good enough (thus fixing Bug 920).

1 files changed, 5 insertions, 3 deletions

diff --git a/src/or/config.c b/src/or/config.c
index 9d5fb3b120..e5f27f9acd 100644
--- a/src/or/config.c
+++ b/src/or/config.c
@@ -4903,15 +4903,17 @@ init_libevent(void)
   /* Your libevent is ancient. */
 #endif
 
-  event_init();
+  tor_libevent_initialize();
+
   suppress_libevent_log_msg(NULL);
 #if defined(HAVE_EVENT_GET_VERSION) && defined(HAVE_EVENT_GET_METHOD)
   /* Making this a NOTICE for now so we can link bugs to a libevent versions
    * or methods better. */
   log(LOG_NOTICE, LD_GENERAL,
       "Initialized libevent version %s using method %s. Good.",
-      event_get_version(), event_get_method());
-  check_libevent_version(event_get_method(), get_options()->ORPort != 0);
+      event_get_version(), tor_libevent_get_method());
+  check_libevent_version(tor_libevent_get_method(),
+                         get_options()->ORPort != 0);
 #else
   log(LOG_NOTICE, LD_GENERAL,
       "Initialized old libevent (version 1.0b or earlier).");