Description: Simplify building of PortAudio based binary

This Makefile patch conditionally adds libasound or libportaudio to the build
flags depending on whether -DPORTAUDIO is included in CFLAGS.

Author: Chris Boot <debian@bootc.net>
Forwarded: no
Last-Update: 2013-12-28

--- a/Makefile
+++ b/Makefile
@@ -1,12 +1,13 @@
 # Cross compile support - create a Makefile which defines these three variables and then includes this Makefile...
 CFLAGS  ?= -Wall -fPIC -O2
-LDADD   ?= -lasound -lpthread -lm -lrt
+LDADD   ?= -lpthread -lm -lrt
 EXECUTABLE ?= squeezelite
 
 # passing one or more of these in $(OPTS) enables optional feature inclusion
 OPT_DSD     = -DDSD
 OPT_FF      = -DFFMPEG
 OPT_LINKALL = -DLINKALL
+OPT_PORTAUDIO = -DPORTAUDIO
 OPT_RESAMPLE= -DRESAMPLE
 OPT_VIS     = -DVISEXPORT
 
@@ -21,6 +22,8 @@
 SOURCES_VIS      = output_vis.c
 
 LINK_LINUX       = -ldl
+LINK_ALSA        = -lasound
+LINK_PORTAUDIO   = -lportaudio
 
 LINKALL          = -lFLAC -lmad -lvorbisfile -lfaad -lmpg123
 LINKALL_FF       = -lavcodec -lavformat -lavutil
@@ -60,6 +63,12 @@
 endif
 endif
 
+ifneq (,$(findstring $(OPT_PORTAUDIO), $(OPTS)))
+	LDADD += $(LINK_PORTAUDIO)
+else
+	LDADD += $(LINK_ALSA)
+endif
+
 OBJECTS = $(SOURCES:.c=.o)
 
 all: $(EXECUTABLE)