add audio

kern/devaudio-none.c

@@ -0,0 +1,35 @@
+/*
+ * Linux and BSD
+ */
+#include	"u.h"
+#include	"lib.h"
+#include	"dat.h"
+#include	"fns.h"
+#include	"error.h"
+#include	"devaudio.h"
+
+/* maybe this should return -1 instead of sysfatal */
+void
+audiodevopen(void)
+{
+	error("no audio support");
+}
+
+void
+audiodevclose(void)
+{
+	error("no audio support");
+}
+
+void
+audiodevsetvol(int what, int left, int right)
+{
+	error("no audio support");
+}
+
+void
+audiodevgetvol(int what, int *left, int *right)
+{
+	error("no audio support");
+}
+