Add ASIO to portaudio

dep/Makefile

@@ -16,9 +16,9 @@ WGET = wget -nc
 UNTAR = tar xf
 UNZIP = unzip
 ifeq ($(ARCH),win)
-	CMAKE = cmake -G 'MSYS Makefiles'
+CMAKE = cmake -G 'MSYS Makefiles'
 else
-	CMAKE = cmake
+CMAKE = cmake
 endif
 
 # Packages
@@ -30,6 +30,7 @@ libcurl = curl-7.54.1
 libzip = libzip-1.2.0
 portmidi = portmidi
 portaudio = portaudio
+asio = asiosdk2.3
 
 
 .NOTPARALLEL:
@@ -92,10 +93,19 @@ $(portmidi):
 	$(MAKE) -C $@
 	$(MAKE) -C $@ install
 
-$(portaudio):
+$(asio):
+	echo "For ASIO support, download and move the ASIO SDK to $@"
+	exit 1
+
+ifeq ($(ARCH),win)
+PORTAUDIO_DEPS = $(asio)
+PORTAUDIO_ASIO = --with-host_os=mingw --with-winapi=wmme,asio --with-asiodir="../$(asio)"
+endif
+
+$(portaudio): $(PORTAUDIO_DEPS)
 	$(WGET) http://www.portaudio.com/archives/pa_stable_v190600_20161030.tgz
 	$(UNTAR) pa_stable_v190600_20161030.tgz
-	cd $@ && ./configure --prefix="$(LOCAL)"
+	cd $@ && ./configure --prefix="$(LOCAL)" $(PORTAUDIO_ASIO)
 	$(MAKE) -C $@
 	$(MAKE) -C $@ install