configure: fix --without-instant_messaging

Refs #54375

Change-Id: Ic1fee5ba3f140f3ce1f8ece581a433963fc0747e

daemon/configure.ac

@@ -349,7 +349,6 @@ AC_ARG_WITH([instant_messaging],
            dnl Fallback to older version
            [with_instant_messaging=no])
     ]);
-AS_IF([test "$with_instant_messaging" != "yes"], [AC_MSG_ERROR([Missing libexpat development files])], [])
 
 AC_DEFINE_UNQUOTED([HAVE_INSTANT_MESSAGING], `if test "x$with_instant_messaging" = "xyes"; then echo 1; else echo 0; fi`, [Define if you have instant messaging support])
 AM_CONDITIONAL(BUILD_INSTANT_MESSAGING, test "x$with_instant_messaging" = "xyes" )

daemon/src/iax/iaxvoiplink.cpp

@@ -244,12 +244,14 @@ IAXVoIPLink::handleBusy(IAXCall& call)
     call.removeCall();
 }
 
+#if HAVE_INSTANT_MESSAGING
 void
 IAXVoIPLink::handleMessage(iax_event* event, IAXCall& call)
 {
     Manager::instance().incomingMessage(call.getCallId(), call.getPeerNumber(),
                                         std::string((const char*) event->data));
 }
+#endif
 
 void
 IAXVoIPLink::handleRinging(IAXCall& call)

daemon/src/iax/iaxvoiplink.h

@@ -94,7 +94,9 @@ class IAXVoIPLink {
         void handleRinging(IAXCall& call);
         void handleAnswerTransfer(iax_event* event, IAXCall& call);
         void handleBusy(IAXCall& call);
+#if HAVE_INSTANT_MESSAGING
         void handleMessage(iax_event* event, IAXCall& call);
+#endif
         void handleHangup(IAXCall& call);
 
         /*