update

Author: Cuda-Chen

Makefile

@@ -59,12 +59,19 @@ ifneq ($(UNAME_S),$(filter $(UNAME_S),Linux Darwin))
     ENABLE_VIRTIOSND := 0
 endif
 
-# Check ALSA installation
+ENABLE_PULSEAUDIO ?= 1
 ifeq ($(UNAME_S),Linux)
+    # Check ALSA installation
     ifeq (0, $(call check-alsa))
         $(warning No libasound installed. Check libasound in advance.)
         ENABLE_VIRTIOSND := 0
     endif
+
+    # Check PulseAudio installation
+    ifeq (0, $(call check-pa))
+        $(warning No PulseAudio installed.)
+        ENABLE_PULSEAUDIO := 0
+    endif
 endif
 ifeq ($(UNAME_S),Darwin)
     ifeq (0, $(call check-ca))
@@ -77,11 +84,11 @@ ifeq ($(call has, VIRTIOSND), 1)
     OBJS_EXTRA += virtio-snd.o
 
     PORTAUDIOLIB := portaudio/lib/.libs/libportaudio.a
-	LDFLAGS += $(PORTAUDIOLIB)
+    LDFLAGS += $(PORTAUDIOLIB)
 
     ifeq ($(UNAME_S),Linux)
         LDFLAGS += -lasound -lrt
-        ifeq (1, $(call check-pa))
+        ifeq (1, $(ENABLE_PULSEAUDIO))
             LDFLAGS += -lpulse
         endif
     endif
@@ -100,7 +107,7 @@ portaudio/Makefile:
 $(PORTAUDIOLIB): portaudio/Makefile
 	@cd $(dir $<) && ./configure
 	@cd $(dir $<) && $(MAKE)
-main.o: $(PORTAUDIOLIB)
+$(OBJS): $(PORTAUDIOLIB)
 
 # suppress warning when compiling PortAudio
 virtio-snd.o: CFLAGS += -Wno-unused-parameter