diff -ur a/gr-audio/lib/CMakeLists.txt b/gr-audio/lib/CMakeLists.txt
--- a/gr-audio/lib/CMakeLists.txt	2012-06-11 17:55:20.000000000 +0200
+++ b/gr-audio/lib/CMakeLists.txt	2012-06-12 23:34:58.601611171 +0200
@@ -38,7 +38,11 @@
 ########################################################################
 find_package(ALSA)
 
-if(ALSA_FOUND)
+GR_REGISTER_COMPONENT("gr-audio-alsa" ENABLE_GR_AUDIO_ALSA
+    ALSA_FOUND
+)
+
+if(ALSA_FOUND AND ENABLE_GR_AUDIO_ALSA)
 
     include_directories(${CMAKE_CURRENT_SOURCE_DIR}/alsa ${ALSA_INCLUDE_DIRS})
     list(APPEND gr_audio_libs ${ALSA_LIBRARIES})
@@ -49,14 +53,18 @@
     )
     list(APPEND gr_audio_confs ${CMAKE_CURRENT_SOURCE_DIR}/alsa/gr-audio-alsa.conf)
 
-endif(ALSA_FOUND)
+endif(ALSA_FOUND AND ENABLE_GR_AUDIO_ALSA)
 
 ########################################################################
 ## OSS Support
 ########################################################################
 find_package(OSS)
 
-if(OSS_FOUND)
+GR_REGISTER_COMPONENT("gr-audio-oss" ENABLE_GR_AUDIO_OSS
+    OSS_FOUND
+)
+
+if(OSS_FOUND AND ENABLE_GR_AUDIO_OSS)
 
     include_directories(${CMAKE_CURRENT_SOURCE_DIR}/oss ${OSS_INCLUDE_DIRS})
     list(APPEND gr_audio_sources
@@ -65,7 +73,7 @@
     )
     list(APPEND gr_audio_confs ${CMAKE_CURRENT_SOURCE_DIR}/oss/gr-audio-oss.conf)
 
-endif(OSS_FOUND)
+endif(OSS_FOUND AND ENABLE_GR_AUDIO_OSS)
 
 
 ########################################################################
@@ -73,7 +81,11 @@
 ########################################################################
 find_package(Jack)
 
-if(JACK_FOUND)
+GR_REGISTER_COMPONENT("gr-audio-jack" ENABLE_GR_AUDIO_JACK
+    JACK_FOUND
+)
+
+if(JACK_FOUND AND ENABLE_GR_AUDIO_JACK)
 
     include_directories(${CMAKE_CURRENT_SOURCE_DIR}/jack ${JACK_INCLUDE_DIRS})
     list(APPEND gr_audio_libs ${JACK_LIBRARIES})
@@ -85,7 +97,7 @@
     )
     list(APPEND gr_audio_confs ${CMAKE_CURRENT_SOURCE_DIR}/jack/gr-audio-jack.conf)
 
-endif(JACK_FOUND)
+endif(JACK_FOUND AND ENABLE_GR_AUDIO_JACK)
 
 ########################################################################
 ## OSX Support
@@ -115,7 +127,11 @@
 ########################################################################
 find_package(Portaudio)
 
-if(PORTAUDIO_FOUND)
+GR_REGISTER_COMPONENT("gr-audio-portaudio" ENABLE_GR_AUDIO_PORTAUDIO
+    PORTAUDIO_FOUND
+)
+
+if(PORTAUDIO_FOUND AND ENABLE_GR_AUDIO_PORTAUDIO)
 
     include_directories(${CMAKE_CURRENT_SOURCE_DIR}/portaudio ${PORTAUDIO_INCLUDE_DIRS})
     list(APPEND gr_audio_libs ${PORTAUDIO_LIBRARIES})
@@ -127,7 +143,7 @@
     )
     list(APPEND gr_audio_confs ${CMAKE_CURRENT_SOURCE_DIR}/portaudio/gr-audio-portaudio.conf)
 
-endif(PORTAUDIO_FOUND)
+endif(PORTAUDIO_FOUND AND ENABLE_GR_AUDIO_PORTAUDIO)
 
 ########################################################################
 ## Windows Support
