compiling error pidgin

media.c: In function 'purple_media_send_dtmf':
media.c:1481:2: error: unknown type name 'PurplePluginProtocolInfo'
  PurplePluginProtocolInfo *prpl_info = NULL;
  ^
media.c:1492:3: error: implicit declaration of function 'purple_connection_get_prpl' [-Werror=implicit-function-declaration]
   prpl = purple_connection_get_prpl(gc);
   ^
media.c:1492:8: warning: assignment makes pointer from integer without a cast
   prpl = purple_connection_get_prpl(gc);
        ^
media.c:1494:3: error: implicit declaration of function 'PURPLE_PLUGIN_PROTOCOL_INFO' [-Werror=implicit-function-declaration]
   prpl_info = PURPLE_PLUGIN_PROTOCOL_INFO(prpl);
   ^
media.c:1494:13: warning: assignment makes pointer from integer without a cast
   prpl_info = PURPLE_PLUGIN_PROTOCOL_INFO(prpl);
             ^
media.c:1507:2: error: implicit declaration of function 'PURPLE_PROTOCOL_PLUGIN_HAS_FUNC' [-Werror=implicit-function-declaration]
  if (prpl_info && PURPLE_PROTOCOL_PLUGIN_HAS_FUNC(prpl_info, media_send_dtmf)
  ^
media.c:1507:62: error: 'media_send_dtmf' undeclared (first use in this function)
  if (prpl_info && PURPLE_PROTOCOL_PLUGIN_HAS_FUNC(prpl_info, media_send_dtmf)
                                                              ^
media.c:1507:62: note: each undeclared identifier is reported only once for each function it appears in
media.c:1508:15: error: request for member 'media_send_dtmf' in something not a structure or union
   && prpl_info->media_send_dtmf(media, dtmf, volume, duration))
               ^
cc1: some warnings being treated as errors
Makefile:1296: recipe for target 'media.lo' failed
make[4]: *** [media.lo] Error 1