Index: configure.ac
--- configure.ac.orig
+++ configure.ac
@@ -147,6 +147,15 @@ if test x"$enable_oss" != x"no"; then
     esac
 fi
 
+dnl check for sndio
+AC_ARG_ENABLE([sndio],
+    [  --disable-sndio make a version not using sndio])
+if test x"$enable_sndio" != x"no"; then
+    AC_DEFINE([LIBAO_SNDIO],,[libao sndio support])
+    AC_CHECK_LIB([sndio],[sio_initpar],
+       [LIBAO_LIBS="$LIBAO_LIBS -lsndio"])
+fi
+
 dnl check for solaris
 AC_ARG_ENABLE([solaris-audio],
     [  --disable-solaris-audio make a version not using solaris audio])