Try to add support of libevent 1.4.*

config.h.in

 /* config.h.in.  Generated from configure.ac by autoheader.  */
 
+/* Use libevent v1 */
+#undef EVENT_V1
+
+/* Use libevent v2 */
+#undef EVENT_V2
+
 /* Define to 1 if you have the `alarm' function. */
 #undef HAVE_ALARM
 
@@ -24,9 +30,6 @@
 /* Define to 1 if you have the `config' library (-lconfig). */
 #undef HAVE_LIBCONFIG
 
-/* Define to 1 if you have the `edit' library (-ledit). */
-#undef HAVE_LIBEDIT
-
 /* Define to 1 if you have the `event' library (-levent). */
 #undef HAVE_LIBEVENT
 
@@ -143,12 +146,6 @@
 /* Use custom prog name */
 #undef PROG_NAME
 
-/* Use libedit */
-#undef READLINE_EDIT
-
-/* Use gnu libreadline */
-#undef READLINE_GNU
-
 /* Define to 1 if you have the ANSI C header files. */
 #undef STDC_HEADERS
 

configure.ac

@@ -19,6 +19,13 @@ AC_CHECK_LIB([m], [sqrt])
 AC_SEARCH_LIBS([clock_gettime], [rt])
 AC_SEARCH_LIBS([backtrace], [execinfo])
 AC_CHECK_LIB([event], [event_base_new], [], [AC_MSG_ERROR([no libevent found])])
+
+EVENT_VER=""
+
+AC_CHECK_HEADER(event2/event.h, [AC_DEFINE([EVENT_V2], [1], [Use libevent v2])], [
+  AC_CHECK_HEADER(event.h, [AC_DEFINE([EVENT_V1], [1], [Use libevent v1])], [AC_MSG_ERROR([no libevent found])])
+  ])
+
 EXTRA_LIBS=""
 
 #     OPENSSL_INCLUDES to the include directives required
@@ -28,18 +35,7 @@ EXTRA_LIBS=""
 AX_CHECK_OPENSSL(,[AC_MSG_ERROR([No openssl found])])
 AX_CHECK_ZLIB(, [AC_MSG_ERROR([No zlib found])])
 
-AC_CHECK_LIB([readline], [rl_save_prompt], 
-  [
-    AC_DEFINE([READLINE_GNU], [1], [Use gnu libreadline])
-    [ EXTRA_LIBS="${EXTRA_LIBS} -lreadline" ; ]
-  ],
-  [
-    AC_SEARCH_LIBS([tgetnum], [ncursesw ncurses curses])
-    AC_CHECK_LIB([edit], [rl_set_prompt])
-    AC_DEFINE([READLINE_EDIT], [1], [Use libedit])
-    [ EXTRA_LIBS="${EXTRA_LIBS} -ledit" ; ]
-  ]
-)
+AC_CHECK_LIB([readline], [rl_save_prompt], [ EXTRA_LIBS="${EXTRA_LIBS} -lreadline" ; ], [AC_MSG_ERROR([no libreadline found])])
 
 AC_MSG_CHECKING([for libconfig])
 AC_ARG_ENABLE(libconfig,[--enable-libconfig/--disable-libconfig],

event-old.h

+#ifndef __EVENT_OLD_H__
+#define __EVENT_OLD_H__
+
+typedef evutil_socket_t int
+  
+static inline struct event *event_new (struct event_base *base, int fd, int what, void(*callback)(int, short, void *), void *arg) {
+  struct event *ev = malloc (sizeof (*ec));
+  event_set (ev, base, fd, what, callback, arg);
+}
+  
+static inline struct event *evtimer_new (struct event_base *base, void(*callback)(int, short, void *), void *arg) {
+  struct event *ev = malloc (sizeof (*ec));
+  evtimer_set (ev, base, callback, arg);
+}
+
+static void event_free (struct event *ev) {
+  event_del (ev);
+  free (ev);
+}
+#endif

interface.c

@@ -42,7 +42,13 @@
 
 #include "interface.h"
 #include "telegram.h"
+
+#ifdef EVENT_V2
 #include <event2/event.h>
+#else
+#include <event.h>
+#include "event-old.h"
+#endif
 //#include "auto/constants.h"
 //#include "tools.h"
 //#include "structures.h"

loop.c

@@ -43,7 +43,12 @@
 #include <sys/stat.h>
 #include <fcntl.h>
 
+#ifdef EVENT_V2
 #include <event2/event.h>
+#else
+#include <event.h>
+#include "event-old.h"
+#endif
 
 #include "interface.h"
 #include "telegram.h"

lua-tg.c

@@ -32,7 +32,12 @@
 #include <lua.h>
 #include <lualib.h>
 #include <lauxlib.h>
+#ifdef EVENT_V2
 #include <event2/event.h>
+#else
+#include <event.h>
+#include "event-old.h"
+#endif
 lua_State *luaState;
 
 //#include "interface.h"

mtproto-client.c

@@ -58,7 +58,12 @@
 #include "tools.h"
 #include "tree.h"
 #include "updates.h"
+#ifdef EVENT_V2
 #include <event2/event.h>
+#else
+#include <event.h>
+#include "event-old.h"
+#endif
 
 #if defined(__FreeBSD__)
 #define __builtin_bswap32(x) bswap32(x)

net.c

@@ -38,7 +38,12 @@
 #include <poll.h>
 #include <openssl/rand.h>
 #include <arpa/inet.h>
+#ifdef EVENT_V2
 #include <event2/event.h>
+#else
+#include <event.h>
+#include "event-old.h"
+#endif
 #include <sys/time.h>
 #include <time.h>
 

queries.c

@@ -54,7 +54,12 @@
 #include "updates.h"
 #include "auto.h"
 #include "tgl.h"
+#ifdef EVENT_V2
 #include <event2/event.h>
+#else
+#include <event.h>
+#include "event-old.h"
+#endif
 
 #define sha1 SHA1
 

tgl.c

@@ -28,7 +28,12 @@
 #include "structures.h"
 #include "net.h"
 
+#ifdef EVENT_V2
 #include <event2/event.h>
+#else
+#include <event.h>
+#include "event-old.h"
+#endif
 
 #include <assert.h>