add USE_SYSTEM_RTAUDIO flag, off by default

CMakeLists.txt

@@ -214,19 +214,7 @@ IF (WIN32)
     ENDIF()
 ENDIF (WIN32)
 
-IF (UNIX AND NOT APPLE)
-    set(BUILD_DEB OFF CACHE BOOL "Build DEB")
-
-    SET(LIQUID_LIB liquid)
-    SET(OTHER_LIBRARIES ${OTHER_LIBRARIES} dl)
-
-    # use the system RtAudio which in turn provides OSS, ALSA, JACK,
-    # PulseAudio support depending on how it was compiled
-    find_package(RtAudio)
-    SET(OTHER_LIBRARIES ${OTHER_LIBRARIES} ${RTAUDIO_LIBRARIES})
-    ADD_DEFINITIONS(${RTAUDIO_DEFINITIONS})
-    include_directories(${RTAUDIO_INCLUDE_DIR})
-ELSE(UNIX AND NOT APPLE)
+MACRO(use_included_rtaudio)
     SET (cubicsdr_sources
         ${cubicsdr_sources}
         external/rtaudio/RtAudio.cpp
@@ -237,6 +225,65 @@ ELSE(UNIX AND NOT APPLE)
     )
     SOURCE_GROUP("_ext-RTAudio" REGULAR_EXPRESSION "external/rtaudio/.*${REG_EXT}")
     include_directories(${PROJECT_SOURCE_DIR}/external/rtaudio)
+ENDMACRO(use_included_rtaudio)
+
+IF (UNIX AND NOT APPLE)
+    set(BUILD_DEB OFF CACHE BOOL "Build DEB")
+
+    SET(USE_SYSTEM_RTAUDIO OFF CACHE BOOL "Use the system RtAudio which in turn provides OSS, ALSA, JACK, PulseAudio support depending on how it was compiled")
+
+    SET(USE_AUDIO_PULSE ON CACHE BOOL "Use Pulse Audio")
+    SET(USE_AUDIO_JACK OFF CACHE BOOL "Use Jack Audio")
+    SET(USE_AUDIO_ALSA OFF CACHE BOOL "Use ALSA Audio")
+    SET(USE_AUDIO_OSS OFF CACHE BOOL "Use OSS Audio")
+  
+    SET(LIQUID_LIB liquid)
+    SET(OTHER_LIBRARIES ${OTHER_LIBRARIES} dl)
+
+    IF(USE_SYSTEM_RTAUDIO)
+        find_package(RtAudio)
+        SET(OTHER_LIBRARIES ${OTHER_LIBRARIES} ${RTAUDIO_LIBRARIES})
+        ADD_DEFINITIONS(${RTAUDIO_DEFINITIONS})
+        include_directories(${RTAUDIO_INCLUDE_DIR})
+    ELSE(USE_SYSTEM_RTAUDIO)
+        use_included_rtaudio()
+
+        IF(USE_AUDIO_PULSE)
+           SET (OTHER_LIBRARIES ${OTHER_LIBRARIES} pulse-simple pulse)
+           ADD_DEFINITIONS(
+                -D__LINUX_PULSE__
+           )
+        ENDIF(USE_AUDIO_PULSE)
+
+        IF(USE_AUDIO_JACK)
+           find_package(Jack)
+           SET (OTHER_LIBRARIES ${OTHER_LIBRARIES} ${JACK_LIBRARIES})
+           ADD_DEFINITIONS(
+                -D__UNIX_JACK__
+           )
+           include_directories(${JACK_INCLUDE_DIRS})
+        ENDIF(USE_AUDIO_JACK)
+
+        IF(USE_AUDIO_ALSA)
+           SET (OTHER_LIBRARIES ${OTHER_LIBRARIES} asound)
+           set(ALSA_INCLUDE_DIR "/usr/include" CACHE FILEPATH "ALSA include path")
+           include_directories(${ALSA_INCLUDE_DIR})
+           set(ALSA_LIB_DIR "/usr/lib" CACHE FILEPATH "ALSA lib path")
+           link_directories(${ALSA_LIB_DIR})
+           ADD_DEFINITIONS(
+               -D__LINUX_ALSA__
+           )
+        ENDIF(USE_AUDIO_ALSA)
+
+        IF(USE_AUDIO_OSS)
+           SET (OTHER_LIBRARIES ${OTHER_LIBRARIES} oss)
+           ADD_DEFINITIONS(
+                -D__LINUX_OSS__
+           )
+        ENDIF(USE_AUDIO_OSS)
+    ENDIF(USE_SYSTEM_RTAUDIO)
+ELSE(UNIX AND NOT APPLE)
+    use_included_rtaudio()
 ENDIF(UNIX AND NOT APPLE)
 
 IF (APPLE)
@@ -258,6 +305,7 @@ ENDIF (APPLE)
 
 
 SET (cubicsdr_sources
+    ${cubicsdr_sources}
     src/CubicSDR.cpp
     src/AppFrame.cpp
     src/AppConfig.cpp
@@ -357,6 +405,7 @@ IF(ENABLE_DIGITAL_LAB)
 ENDIF()
 
 SET (cubicsdr_headers
+    ${cubicsdr_headers}
     src/CubicSDRDefs.h
     src/CubicSDR.h
     src/AppFrame.h