Add CoreAudio check

Author: Cuda-Chen

Makefile

@@ -55,7 +55,7 @@ endif
 
 # virtio-snd
 ENABLE_VIRTIOSND ?= 1
-ifneq ($(UNAME_S),$(filter $(UNAME_S),Linux))
+ifneq ($(UNAME_S),$(filter $(UNAME_S),Linux Darwin))
     ENABLE_VIRTIOSND := 0
 endif
 
@@ -66,19 +66,34 @@ ifeq ($(UNAME_S),Linux)
         ENABLE_VIRTIOSND := 0
     endif
 endif
+ifeq ($(UNAME_S),Darwin)
+    ifeq (0, $(call check-ca))
+        $(warning No CoreAudio installed Check AudioToolbox in advance.)
+        ENABLE_VIRTIOSND := 0
+    endif
+endif
 $(call set-feature, VIRTIOSND)
 ifeq ($(call has, VIRTIOSND), 1)
     OBJS_EXTRA += virtio-snd.o
 
     PORTAUDIOLIB := portaudio/lib/.libs/libportaudio.a
+	LDFLAGS += $(PORTAUDIOLIB)
+
+    ifeq ($(UNAME_S),Linux)
+        LDFLAGS += -lasound -lrt
+        ifeq (1, $(call check-pa))
+            LDFLAGS += -lpulse
+        endif
+    endif
+    ifeq ($(UNAME_S),Darwin)
+        LDFLAGS += -framework AudioToolbox 
+    endif	
+
+    CFLAGS += -Iportaudio/include
 	# PortAudio requires libm, yet we set -lm in the end of LDFLAGS
 	# so that the other libraries will be benefited for no need to set
 	# -lm separately.
-    LDFLAGS += $(PORTAUDIOLIB) -lasound -lpthread -lrt
-    ifeq (1, $(call check-pa))
-        LDFLAGS += -lpulse
-    endif
-    CFLAGS += -Iportaudio/include
+    LDFLAGS += -lpthread
 
 portaudio/Makefile:
 	git submodule update --init portaudio

mk/check-libs.mk

@@ -21,6 +21,18 @@ int main(){\n\
 }\n'
 endef
 
+# Create a mininal CoreAudio program
+define create-ca-prog
+echo '\
+#include <CoreAudio/CoreAudio.h>\n\
+#include <AudioToolbox/AudioQueue.h>
+int main(){\n\
+    AudioQueueRef queue;\n\
+    AudioQueueDispose(queue, TRUE);\n\
+    return 0;\n\
+}\n'
+endef
+
 # Check ALSA installation
 define check-alsa
 $(shell $(call create-alsa-prog) | $(CC) -x c -lasound -o /dev/null > /dev/null 2> /dev/null - 
@@ -32,3 +44,9 @@ define check-pa
 $(shell $(call create-pa-prog) | $(CC) -x c -lpulse -o /dev/null > /dev/null 2> /dev/null - 
 	&& echo $$?)
 endef
+
+# Check CoreAudio installation
+define check-ca
+$(shell $(call create-ca-prog) | $(CC) -x c -framework AudioToolbox -o /dev/null > /dev/null 2> /dev/null - 
+	&& echo $$?)
+endef