diff -r 56cd8111b7f7 -r 41300fa6a67c src/multimedia/audio/audio.pri
--- a/src/multimedia/audio/audio.pri	Tue Jan 26 12:42:25 2010 +0200
+++ b/src/multimedia/audio/audio.pri	Tue Feb 02 00:43:10 2010 +0200
@@ -17,6 +17,8 @@
            $$PWD/qaudioengine.cpp \
            $$PWD/qaudiodevicefactory.cpp
 
+contains(QT_CONFIG, audio-backend) {
+
 mac {
     HEADERS +=  $$PWD/qaudioinput_mac_p.h \
                 $$PWD/qaudiooutput_mac_p.h \
@@ -51,3 +53,6 @@
         }
     }
 }
+} else {
+    DEFINES += QT_NO_AUDIO_BACKEND
+}